This standard specifies the terminology, product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, etc. of frost-free refrigerators, frost-free refrigerators and freezers, frost-free frozen food storage boxes and frost-free food freezers. This standard applies to motor-driven compression household frost-free refrigerators, frost-free refrigerators and freezers, frost-free frozen food storage boxes and frost-free food freezers with a capacity of less than 500L. Hereinafter referred to as frost-free refrigerators (or refrigerators). Frost-free refrigerators use internal forced air circulation cooling, and all compartments are automatic defrosting and have automatic defrosting water treatment devices. This standard also applies to refrigerators with a refrigeration system, some of which use forced air circulation cooling, while other compartments use natural convection cooling, but all have automatic defrosting with automatic defrosting water treatment. If some compartments in the refrigerator use natural convection cooling and have a separate refrigeration system, these compartments should be assessed in accordance with GB 8059.1~8059.3. This standard does not apply to frost-free refrigerators for special purposes. GB/T 8059.4-1993 Household refrigeration appliances Frost-free refrigerators, frost-free refrigerator-freezers, frost-free frozen food storage boxes and frost-free food freezers GB/T8059.4-1993 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Household refrigerating appliances
Frost-free refrigerators, frost-free refrigerator-freezers, frost-free frozen food storage cabinets and frost-free food freezers Household refrigerating appliances Frost-free refrigerators, frost-free refrigerator-freezers, frost-free frozen food storage cabinets and frost-free food freezers GB/T 8059.4-93
This standard is equivalent to ISO8561 "Household refrigerating appliances-Frost-free refrigerators, frost-free refrigerator-freezers, frost-free frozen food storage cabinets and frost-free food freezers".
1 Subject content and scope of application
This standard specifies the terminology, product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, etc. of frost-free refrigerators, frost-free refrigerator-freezers, frost-free frozen food storage cabinets and frost-free food freezers. This standard applies to motor-driven compression household frost-free refrigerators, frost-free refrigerators, frost-free frozen food storage boxes and frost-free food freezers with a capacity of less than 500L, hereinafter referred to as frost-free refrigerators (or refrigerators). Frost-free refrigerators use internal forced air circulation cooling, and all compartments are automatic defrosting and have automatic defrosting water treatment devices. bzxz.net
This standard also applies to refrigerators with a refrigeration system, some of which use forced air circulation cooling, while other compartments use natural convection cooling, but all have automatic defrosting with automatic defrosting water treatment. If some compartments in the refrigerator use natural convection cooling and have separate refrigeration systems, these compartments should be assessed in accordance with GB8059.1~8059.3.
This standard does not apply to frost-free refrigerators for special purposes. 2 Reference standards
Packaging, storage and transportation pictorial marking
GB1911
GB1019General rules for household electrical appliances packaging
GB2423.3 Basic environmental test procedures for electrical and electronic products Test Ca: Steady-state damp heat test method GB2423.17 Basic environmental test procedures for electrical and electronic products Test Ka: Salt spray test method GB2828 Count sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches) GB2829 Count sampling procedures and sampling tables for periodic inspection (applicable to inspection of production process stability) GB3785
Electroacoustic performance and test methods of sound level meters
Determination of sound power level of household electrical appliances
GB4214
General safety requirements for household and similar electrical appliances GB4706.13 Safety of household and similar electrical appliances Special requirements for household refrigerators and food freezers GB 4798.1
Environmental conditions for application of electric and electronic products Storage Approved by the State Administration of Technical Supervision on November 19, 1993 1174
Implementation on May 1, 1994
GB/T 8059.4—93
GB4798.2 Environmental conditions for application of electric and electronic products Transport GB8059.1-8059.3 Household refrigeration appliances
3 Terminology
3.1 Household frost-free appliances An insulated box with appropriate capacity and equipment for household use, which is refrigerated by one or more means consuming electrical energy, in which all compartments are automatic defrosting and have automatic defrost water treatment devices, and at least one compartment is refrigerated by a frost-free system (Article 3.1.5). 3.1.1 Household frost-free refrigerator A frost-free refrigerator has one or more compartments for storing food, at least one of which is suitable for storing food that does not need to be frozen (Article 3.2.1).
3.1.2 Household frost-free refrigerator-freezer A frost-free refrigerator with two or more compartments, at least one of which is suitable for storing foods that do not need to be frozen (Article 3.2.1), at least one freezer suitable for freezing fresh foods (Article 3.2.6), and can store frozen foods under "three-star" storage conditions (Article 3.2.5.4).
3.1.2.1 Single-control type I household refrigerator-freezer \) household refrigerator-freezer type I A refrigerator-freezer with only one temperature control means for adjusting the temperature of the refrigerator and freezer. 3.1.2.2 Multi-control type household refrigerator-freezer!) household refrigerator-freezer type I A refrigerator-freezer with multiple temperature control means for separately adjusting the temperature of each refrigerator and freezer. 3.1.3 Household frost-free frozen food storage 2) household frost-free frozen food storage A frost-free refrigerator with one or more *three-star” grade frozen food storage compartments (Article 3.2.5). 3.1.4 Household frost-free food freezer A frost-free refrigerator with one or more freezing compartments (Article 3.2.6). Note: 1) If there is a cooling compartment, additional temperature control means may be provided to adjust the temperature of the compartment. 2) In some cases, a "two-star\-rated part" (Chapter B6) is allowed in the refrigerator. 3.1.5 Frost-free system A frost-free system, whose internal cooling is achieved by forced air circulation, and the defrosting of its evaporator is achieved by an automatic box system. The characteristics of the box-free system are: a. The system works automatically to prevent the formation of a persistent frost layer on all refrigeration surfaces; b. The storage temperature of the refrigerator, cooling room, frozen food storage room and freezer should be maintained within the limit range specified in the relevant provisions of this standard;
Automatic processing of defrost water.
3.2 Compartments
3.2.1 Refrigerator fresh food storage compartment A compartment used to store food that does not need to be frozen. The room can also be divided into some small compartments. The indoor temperature should be able to be maintained at the temperature specified in Article 5.3.1.
3.2.2 Cooling room chiller Compartment used to store some special food or beverages, its temperature is slightly higher than the cold storage room, and its indoor temperature should be able to maintain the temperature specified in Article 5.3.1.
3.2.3 Low temperature compartment This room can be one of the following;
a. Ice making room;
b. Frozen food storage room.
3.2.4 Ice making compartment1175
GB/T8059.4—93
A compartment specially used for freezing and storing ice cubes. 3.2.5 Frozen food storage compartment A compartment specially used for storing frozen food, which is divided into the following three levels according to its storage temperature: 3.2.5.1 "one star" compartment The storage temperature (3.4.3.2) measured in accordance with Article 6.2.1 of this compartment shall not be higher than -6℃. 3.2.5.2 “Two star” compartment The storage temperature of this compartment measured in accordance with the provisions of 6.2.1 (Article 3.4.3.2) shall not be higher than 12℃. 3.2.5.3 “Two star” section is a part of a freezer (or box) or a “three star” room (or box), which is not independent (i.e., there are local partitions, but there are no separate doors or covers for entry and exit). The storage temperature of this part measured in accordance with the provisions of 6.2.1 (Article 3.4.3.2) shall not be higher than -12℃ (see Chapter B6). 3.2.5.4 “Three star” compartment The storage temperature of this compartment measured in accordance with the provisions of 6.2.1 (Article 3.4.3.2) shall not be higher than -18℃. 3.2.6 “Food freezer compartment” This compartment can store test packages of not less than 4.5kg/100L effective volume (but not less than 2kg) in accordance with 6.2.6, within 24 hours, the temperature is frozen from 25℃ to -18℃ (for SN, N, ST type refrigerators) or from 32℃ to -18℃ (for T type refrigerators). It is also suitable for storing frozen food under "three-star" storage conditions (3.2.5.4), and the storage temperature is not higher than -18℃. Note: 1) In some cases, the room is allowed to have a "two-star" part (Chapter B6). 3.3 General definition 3.3.1 Top-opening type Refrigerator with food taken in and out through the top door or cover. 3.3.2 Upright type Refrigerator with food taken in and out through the front door or cover. 3.3.3 Overall dimensions When the door (or cover) is closed, it is expressed as the size of a rectangular parallelepiped connected to the inside of the refrigerator with a horizontal bottom (length × width × height). Includes accessories, but does not include handles. If there are other protrusions, they should be stated separately. 3.3.4 Overall space required Inuse doors or lids are open, the overall dimensions include handles, plus the space required for free circulation of cooling air when the refrigerator is in use, plus the space required to allow the door or lid to be opened to the minimum angle in order to remove all movable parts in the box. See Figure 1. Width
Total space required for use in Figure 1
3.3.5 Volumes
3.3.5.1 Gross volume
GB/T8059.4-93
The volume enclosed by the inner wall of the refrigerator or the inner wall of the compartment with an outer door when the door or lid is closed and there are no internal accessories. When calculating the gross volume, the volume occupied by the air duct, evaporator, fan and other accessories should be subtracted from it. 3.3.5.2 Rated gross volume The gross volume marked by the manufacturer.
3.3.5.3 Total gross volume Volume is the sum of the gross volumes of the refrigerating chamber, cooling chamber, cryogenic chamber, freezing chamber (including the "two-star" grade part thereof) and other refrigerating chambers (see Chapter B2) (including chambers with or without independent doors). 3.3.5.4 Rated total gross volume Rated total gross volume The total gross volume marked by the manufacturer.
3.3.5.5 Effective volume storage volume The effective volume of the chamber is the volume occupied by each component and the space that is deemed not to be used for food storage after deducting the gross volume of any chamber. It is measured by the method specified in Appendix B (Supplement). 3.3.5.6 Rated effective volume Rated storage volume The effective volume marked by the manufacturer.
3.3.5.7 Total effective volume total storage volume The sum of the effective volumes of the refrigerating chamber, cooling chamber, cryogenic chamber, freezing chamber (including the "two-star" grade part thereof) and other refrigerating chambers (see Chapter B2) of the refrigerator.
3.3.5.8 Rated total storage volume The total effective volume marked by the manufacturer.
3.3.6 Shelf
A shelf (or shelf) is a component with a certain mechanical strength on which food is placed. The shelf may be fixed or movable (or mobile). 3.3.7 Load limit
The surface surrounding the effective volume of frozen food. 3.3.8 Load limit line The permanent mark indicating the effective volume limit of "three-star" frozen food storage. 3.4 Definition relating to some performance characteristic3.4.1 Energy consumption The energy consumption of a refrigerator in steady operation for 24 hours. It is measured at an ambient temperature of 25℃ (SN, N, ST type) or 32℃ (T type) according to the test method specified in 6.2.4. 3.4.2 Rated energy consumption The energy consumption marked by the manufacturer.
3.4.3 Storage temperatures3.4. 3.1 Food storage temperature (tm)3.4.3.1.1t refers to the arithmetic mean of the instantaneous temperatures t1, t2t: measured inside the M” package (3.4.6) placed at the measuring point specified in 6.1.5 in the refrigerated room.
3.4.3.1.2tmm refers to the maximum value of tm.3.4.3.2 Frozen food storage temperature (t**, t**, z\) frozen food storage temperaturet”*, t**, “ refers to the highest temperature of the hottest “M” package among the test packages placed in the corresponding star-rated frozen food storage room and freezer\ as specified in 6.1.6.
Note: 1) The freezer has “three-star” storage conditions for storing frozen food (3.2.6). 3.4.3.3 Chiller compartment temperature (tem) 3.4.3.3.1 tm refers to the arithmetic mean of the instantaneous temperatures 1177
tel, tez, tes measured in the "M" package (3.4.6) placed at the measuring point specified in 6.1.5 in the cooling room.
3.4.3.3.2 temmax refers to the maximum value of tem. 3.4.4 freezing capacity GB/T 8059.4-93
Under the test conditions specified in 6.2.6, the mass of the test package (refrigerated load) when the temperature (refrigerated load) drops from the loading temperature of 25℃ or 32℃ (3.2.6) to -18℃ within 24h. The freezing capacity is expressed in kg/24h. 3.4.4.1 Rated freezing capacity The freezing capacity marked by the manufacturer.
3.4.5Defrosting
3.4.5.1 Automatically defrosted During defrosting, the evaporator is automatically defrosted, and there is no need to manually start the defrosting device. After defrosting, there is no need to manually restore its normal operation and remove the defrost water. That is, the whole defrosting process is completed automatically. 3.4.5.2 Automatic disposal of defrost water The disposal of defrost water is automatic, and the user does not need to remove and evaporate the defrost water. 3.4.6\M\package"M\package
A test package with a size of 50mm×100mm×100mm and a temperature sensing element installed at the geometric center according to the provisions of Article 6.1.2.3.4.7 cycles
3.4.7.1 operating cycle operating cycle refers to the time interval from the start of defrosting action in one defrosting cycle to the start of action in the next defrosting cycle.3.4.7.2 defrosting cycle the time interval from the moment the evaporator defrosting device is turned on to the moment the refrigeration process is resumed.3.4.8 stable operating conditions When the refrigerator has been running for not less than one operating cycle, during this time, there is no adjustment to the setting position of the temperature control device, and there is no obvious tendency to deviate from its storage temperature (see Table 3) thereafter, then the stable operating state has been reached.3.4.9 percentage running time refrigerator has a device to control the start and stop of the refrigeration source. Under the conditions of given ambient temperature and storage temperature in the box, its working time coefficient is: dt
R'(%) =
·（1)
Where: d\—the time the refrigeration system is running (on) in one operating cycle (Article 3.4.7.1); the total time of an operating cycle minus the time of the defrost cycle (Article 3.4.7.2), even if hot gas is used for defrosting (see D
Figure 2).
This standard takes into account the time of the defrost cycle when calculating the working time coefficient. In order to have a clear distinction from the working time coefficient R of general refrigerators, R' is introduced here. Its determination method is shown in Appendix C (reference). 3.4.10 Ice making capacity refers to the amount of ice that a refrigerator can make within 24 hours. Or it refers to the time required for the water in the ice box provided by the refrigerator to freeze into solid ice. 3.4.11 Ambient temperature refers to the temperature of the space around the refrigerator during the test. It is the arithmetic mean of the average temperature measured at two points 350mm from the center of the two side wall surfaces of the refrigerator and 1m above the ground and t2. 3.4.12 Load temperature rise time The temperature rise time refers to the time from the moment when the hottest "M" package in the freezer compartment (or cabinet) or "three-star" compartment (or cabinet) reaches -18°C to the moment when any "M" package (excluding "two-star" parts) first rises to -9°C under the specified test conditions when the refrigeration system is interrupted.
GB/T 8059.4—93
3.5 Definition relating to the refrigerating system 3.5.1 Refrigerant
A fluid that transfers heat in a refrigeration system usually by phase change. The fluid absorbs heat at low temperature and low pressure and releases heat at high temperature and high pressure. 3.5.2 Cooling device device
A device in which an evaporator is installed or in thermal contact with an evaporator. It may be a finned device or may be shaped to be suitable for storing frozen food or ice cubes.
3.6 Definition relating to compression-type appliances3.6.1 Compression-type applianceThe refrigeration process in a refrigerator is accomplished by evaporation of a liquid refrigerant at low pressure in an evaporator. The resulting vapour is mechanically compressed to become high-pressure vapour and then cooled in a condenser to return to liquid refrigerant. 3.6.2 Hermetically sealed motor-driven refrigerating compressorThe compressor and motor (or at least its moving parts) are housed in a hermetically sealed casing which is sealed by welding or other means and which cannot normally be disassembled after assembly.
There are no moving parts outside the casing.
3.6.3 Hermetically sealed compressor refrigerating system systemThe refrigeration system consists mainly of a motor-driven compressor, a condenser, a pressure reducing element, an evaporator and all other components containing the refrigerant, which are permanently connected by the manufacturer by welding or other methods. 3.6.4 Refrigerant compressor A mechanically operated component that draws refrigerant vapor from the evaporator and discharges it into the condenser at a higher pressure. 3.6.5 Expansion device An element that reduces the pressure of the refrigerant from the cold-shrouding pressure to the evaporation pressure. 3.6.6 Condenser
A heat exchanger in which the compressed vapor refrigerant is liquefied by discharging heat to the external cooling medium.
3.6.7 Evaporator
A heat exchanger in which the liquid refrigerant after pressure reduction is evaporated by absorbing heat from the cooled medium. 3.6.8 Thermostat
A device that automatically adjusts the operation of the refrigeration system according to the temperature of the evaporator or compartment (or box). 3.6.9 Fan
A device that provides cooling to the condenser and/or one or more compartments of a refrigerator by means of forced airflow. 3.6.10 Defrost timer A device that can control the start, duration and termination of defrost between defrost cycles. 3.6.11 Demand defrost A defrost system that can control the start of a defrost cycle according to the rate of frost accumulation on the evaporator surface. 3.6.12 Defrost heater A device that can provide heat to the frost on the evaporator surface to promote the melting and removal of the frost. 4 Product classification
4.1 Type
4.1.1 Climate type
According to the climate environment temperature when the refrigerator is in normal use, it is divided into: 1179
Climate type
Subtemperate
Subtropical
4.1.2 Purpose classification
According to the purpose of the refrigerator, it is divided into:
Purpose category
Refrigerator
Refrigerator-freezer
Freezer
4.1.3 Cooling method classification
According to the cooling method of each compartment of the refrigerator, it is divided into:
GB/T 8059.4-93
Ambient temperature of refrigerator in normal use
Ambient temperature range of refrigerator in normal use and meet the requirements of storage temperature in 5.3.1
Table 2 Code of refrigerator use category
Code (Chinese phonetic letter)
Natural convection cooling (direct cooling), no letter; forced air circulation cooling (wind cooling) and frost-free system, indicated by Chinese phonetic letter W. 4.2 Specifications
Refrigerator specifications are indicated by rated total effective volume (L). Only Arabic numerals are marked, without units. It is recommended that the effective volume be in multiples of 5, such as 170, 175, 180185, 190, 195, 2004.3 Model naming
The product models and their meanings are as follows:
Improved design serial number, using capital letters to indicate the cooling method, according to Article 4.1.3
Specification code, according to Article 4.2
Application classification according to Article 4.1.2
Example:
-Product code, household refrigeration appliances (refrigerators) second improved design 180L household frost-free refrigerator-freezer is indicated as: BCD-180WB
200L household frost-free food freezer is indicated as: BD-200 W
5 Technical requirements
5.1 Operating environment
GB/T8059.4—93
Under the following environmental conditions, frost-free refrigerators can still be used. 5.1.1 Ambient temperature
Subtemperate type (SN), temperate type (N)
Subtropical type (ST)
Tropical type (T)
5.1.2 Ambient humidity
Relative humidity is not more than 90%.
5.1.3 Power supply
Voltage: 187~～242V
Frequency 50±1Hz.
5.2 Total effective volume
10~~35℃;
10～40℃,
10~~43℃.
The total effective volume of the refrigerator shall be calculated in accordance with the provisions of Appendix B (Supplement), and the calculated value shall not be less than 97% of the rated value. 5.3 Refrigeration performance
5.3.1 Storage temperature
When testing in accordance with Article 6.2.1, the temperature of each compartment of the frost-free refrigerator shall comply with the provisions of Table 3 and Article 3.2.5 star rating. See Figure 2 for an example.
Table 3 Storage temperature of refrigerators without registration in all climate types Refrigerator
(Article 3.4.3.1)
Temperature condition
itzvt3
Storage temperature
Permitted temperature deviation during defrost cycle
0≤≤10
Frozen food storage room (or box)
Freezer (or box)
or its indoor star-rated part
(Article 3.4.3.2 and Chapter B6)
Cooling room
(Article 3.4.3.3)
fam mnx
8ten ma14
8tem m14
Note: ① As a result of the influence of the defrost cycle, the duration of temperature deviation higher than the storage temperature (condition I) in Table 3 should not be greater than 4 h. ② If it is level "3", the duration of the temperature excursion shall be measured from the moment when the first "M" package is higher than 18℃ to the moment when the last "M" package permanently returns to or is lower than -18℃. ③ If it is tm, the duration of the temperature excursion shall be measured from the moment when tm is higher than 5℃ to the moment when it permanently returns to or is lower than 5℃. ④ The above two temperature excursions do not need to occur at the same time. 1181
5.3.2 Cooling rate
GB/T 8059.4--93
Start of refrigeration process
Maximum 0.2×"X" or maximum 4h
Last M\pack
×"X\ or maximum 4h
Evaporator temperaturet
Chemistry cycle
Operation cycle\X
Chemistry device switched on
Figure 2 Example of an operation cycle of a frost-free refrigeratort
When testing according to 6.2.2, the instantaneous temperature of each compartment of a frost-free refrigerator (tmm ax>temmavt**, z”*, t”) should all reach the storage temperature value in Table 3 (Condition I), and the continuous operation time should not exceed 3h. 5.3.3 Ice-making capacity
The ice-making capacity of a frost-free refrigerator can be assessed according to one of the following conditions (this requirement does not apply to automatic ice-making machines): 5.3.3.1 Assess according to the ice-making box provided by the manufacturer. When tested according to 6.2.3.1, the water in the ice box should be completely frozen into solid ice within 3h.
5.3.3.2 Assessed according to The manufacturer shall mark the ice production volume for 24 hours for assessment. When testing in accordance with 6.2.3.2, the water in the ice box shall be completely frozen into solid ice within the specified conversion time.
5.3.4 Power consumption
When the power consumption is measured in accordance with 6.2.4, the actual measured value shall not be greater than 115% of the rated value. 5.3.5 Load temperature recovery time
Applicable to the freezer compartment of frost-free refrigerators and "three-star" grade frozen food storage rooms. The refrigerator shall have good thermal insulation performance. The refrigerator shall be designed so that its load The temperature recovery time shall be appropriately extended and expressed in minutes. When the load temperature recovery time is measured in accordance with Article 6.2.5, the actual measured value shall not be less than 90% of the rated value, but shall not be less than 250 minutes. For frost-free freezers, it shall not be less than 300 minutes. 5.3.6 Freezing capacity
When frost-free refrigerators and frost-free food freezers are measured in accordance with Article 6.2.6, the measured freezing capacity shall not be less than 1182
90% of the rated value, nor less than the minimum limit of freezing capacity. GB/T 8059.4--93
The minimum limit of freezing capacity is 4.5kg/100L (freezer) and the freezer below 45L shall not be less than 2kg. 5.4 Structure and material performance
5.4.1 Insulation performance and anti-condensation
The refrigerator should have good insulation performance. The insulation material should not have obvious shrinkage deformation, and the outer surface of the refrigerator should not be allowed to accumulate excessive water vapor during normal operation.
The refrigerator shall be in accordance with 6.3.1 When conducting the condensation test according to Article 6.3.2, no bead-like or running condensation should appear on the outer surface of the refrigerator. 5.4.2 Airtightness
The door seal or lid seal should have good airtightness. After the door or lid is closed, the door seal or lid seal should be tight all around, and there should be no gap between the door seal or lid seal and the box wall to allow outside air to enter the box. When conducting the test according to Article 6.3.2, the paper should not slide freely. 5.4.3 Durability of door hinges and handles
The door hinges and handles should be strong and corrosion-resistant. When conducting the durability test according to Article 6.3.3, the outer doors or lids of the cold storage room and the cooling room should not be damaged after 100,000 opening and closing tests, and their airtightness should not be damaged. After the test is completed, it should be subjected to the airtightness test of Article 6.3.2 again, and the result should meet the requirements of Article 5.4.2. Frozen food storage boxes, food freezers, and refrigerators with freezer compartments and frozen food storage compartments, if they have separate outer doors or lids, their hinges and handles should not be damaged after 10,000 opening and closing tests, and their airtightness should not be impaired. After the test, they should be subjected to the airtightness test of 6.3.2, and the results should meet the requirements of 5.4.2. After the test, the fastening system should still enable the door or lid to be easily opened and closed and maintain its good function. 5.4.4 Shelves and containers
Shelves, containers and similar parts should have sufficient mechanical strength and should not be deformed to lose their original functions after the mechanical strength test of 6.3.4. In particular, sliding parts or rotating parts should be able to move completely when loaded with cylindrical loads. Removable movable shelves, containers and similar parts should be easy to remove when in use. 5.4.5 Internal materials of refrigerators
Internal materials and accessories of refrigerators should not produce or transmit odor to food during normal use. When the odor test is carried out in accordance with Article 6.3.5, the evaluation value (average value) of each cold storage room and cooling room should not be greater than 1. When the internal materials of the refrigerator come into contact with the stored food, they should not contaminate the food, nor should they transfer toxic substances to the food. The materials should be resistant to moisture and food acids.
All decorative surfaces for use should have appropriate strength, firm color, easy to clean and resistant to moisture and food acids. 5.4.6 Sealing performance of refrigeration system
The refrigeration system should be sealed. When leak detection is carried out in accordance with Article 6.3.6, the annual leakage of refrigerant at any part should not be greater than 0.5g. 5.4.7 Noise and vibration
5.4.7.1 When the noise of the refrigerator is measured in accordance with Article 6.3.7.1, the sound power level of the noise should not be greater than 52dB(A) for refrigerators of 250L and below, and should not be greater than 55dB(A) for refrigerators of more than 250L. 5.4.7.2 When the refrigerator is subjected to vibration test according to 6.3.7.2, the effective value of its vibration velocity shall not be greater than 0.71 mm/s. 5.4.8 Electroplated Parts
After the metal electroplated parts of the refrigerator are subjected to salt spray test according to 6.3.8, the surface corrosion of the electroplated layer shall be checked. The number of metal rust spots and rust marks on the coating shall not exceed 2 per 100 cm. The area of ​​each rust spot and rust mark shall not exceed 1 mm. When the surface area of ​​the test piece is less than 100 cm2, rust spots and rust marks are not allowed.
5.4.9 Surface Coating
5.4.9.1 After the surface coating of the refrigerator is subjected to damp heat test according to 6.3.9.1, its surface appearance is good and no obvious pinholes are allowed. In any 100 cm2 square area of ​​the main surface of the specimen, there shall be no more than 2 bubbles with a diameter of 0.5 to 1 mm. Bubbles with a diameter greater than 1 mm are not allowed.
GB/T 8059.4--93
5.4.9.2 After the surface coating of the refrigerator is subjected to the adhesion test according to 6.3.9.2, no more than one-third of the coating area shall be allowed to fall off. 5.4.10 Appearance requirements
The appearance should not have obvious defects, and the decorative surface should be flat and bright. The coating surface should be flat and bright, with consistent color and uniform luster. The coating should be firm and easy to clean. There should be no obvious defects such as flow scars, scratches, pits, wrinkles, bubbles, missing coating and aggregated sand particles. The decorative coating of electroplated parts should be smooth and fine, with uniform color, and there should be no obvious defects such as spots, pinholes, bubbles and coating peeling. The surface of plastic parts should be flat and smooth, with uniform color, and there should be no defects such as cracks, bubbles, obvious shrinkage holes and deformation. The nameplate and all signs should be complete. The nameplate should be checked according to the content of 8.1.1 and should meet the requirements. 5.5 Requirements for refrigerator structure and design
Refrigerators should be designed with facilities for collecting, draining and treating defrost water. Frost-free refrigerators should have external defrost water collectors, in which the defrost water is evaporated. The defrost water collector should have sufficient volume and sufficient evaporation means. The defrost water drainage system should be easy to remove any blockages and prevent outside air from invading the refrigerator compartments. Appropriate anti-condensation measures should be taken when designing refrigerators. Dust accumulation should be avoided and reduced as much as possible when designing condensers. Protective measures should be taken when designing evaporators to prevent them from being damaged during normal use of the refrigerator. Surfaces for heat exchange should be made of non-toxic and corrosion-resistant materials, or non-corrosion-resistant coatings (or platings) should be used to withstand temperature changes and alternating frosting and defrosting processes. Components that may be replaced, such as switches, light bulbs, thermostats and other control and adjustment devices, should be designed to be installed in places that are easy to operate, replace and safe.
The installation and connection of refrigeration system pipes, especially the connection with moving parts, should be designed to avoid noise, vibration and damage due to fatigue. The system should be installed and fixed safely and reliably. If necessary, some pipes and valves should be well insulated. When designing the refrigeration system, appropriate measures should be taken to prevent condensation of water vapor on cold parts, which will affect the operation of the refrigeration system and harm the refrigerator and the surrounding environment.
When designing the refrigeration system, the material should have sufficient strength and should not be inferior due to the action of refrigerants, lubricants or other mixtures. Freezers and "three-star" frozen food storage rooms should be equipped with load limit lines (Figure 3), but they may not be set in any of the following situations: a. Any space within the gross volume of the compartment is suitable for storing food under "three-star" storage conditions; b. Its load limit is specified by special structural forms, such as baskets, containers, baffles, etc.; c. Its load limit is determined by natural limits (Figure A1). The load limit line should be marked clearly, non-fading, and can be marked with one or more load limit lines. The size of the mark can be reduced in proportion, but not less than half of the specified size.
6 Test method
6.1 General test conditions
6.1.1 Test room
GB/T 8059.4—93
100～[50
This side indicates the load limit
Figure 3 Load limit line mark
The refrigerator is placed in this test room for testing according to the method specified in Article 6.1.1.4. The ambient temperature in the test room is adjustable within the range of 10～43℃. The parameters such as ambient temperature, ambient humidity and ambient air flow rate in the test room are represented by the values ​​measured at the measuring points specified in Article 3.4.11.
If multiple refrigerators are tested at the same time, their environmental parameters should be the arithmetic mean of the values ​​measured at the specified measuring points of each refrigerator. 6.1.1.1 Ambient temperature
All tests shall be conducted under the following ambient temperature conditions: When testing the storage temperature of refrigerators and refrigerator-freezers: a.
10℃ and 32℃,
16℃ and 32℃,
18℃ and 38℃,
18℃ and 43℃.
When testing the storage temperature of frozen food storage boxes and food freezers: SN type, N type
32℃;
38℃;
43℃.
When testing power consumption, load temperature recovery time, and freezing capacity: c.
SN type, N type, ST type
25℃,
32℃.
The tests of other test items shall be conducted at the temperatures specified in the test requirements. d.
When the stable operation state is required and during the test, the temperature at the specified measuring points (3.4.11) should be maintained at the specified ambient temperature, and its fluctuation range should be within ±0.5K. Within a range of 2m from the test platform (6.1.1.4), the vertical temperature gradient should not exceed 2K/m. 1185
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.