Some standard content:
National Standard of the People's Republic of China
Household refrigerating appliances-Refrigerators
Household refrigerating appliances-RefrigeratorsGB/T 8059.1—1995
Replaces GB8059.1-87
This standard adopts the international standard ISO7371:1995 "Household refrigerating appliances-Performance and test methods of refrigerators with or without low-temperature chambers".
Subject content and scope of application
This standard specifies the terminology, product classification, technical requirements, test methods and inspection rules, marking, packaging, transportation, storage, etc. of refrigerators. This standard applies to closed motor-driven compression household refrigerators below 500L (hereinafter referred to as refrigerators). This standard does not apply to refrigerators for special purposes.
2 Reference standards
Packaging, storage and transportation pictorial symbols
GB1019 General rules for household electrical appliances packaging
GB/T2423.17 Basic environmental testing 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 Electrical and acoustic performance and test methods of sound level meters GB/T4214 Determination of sound power level of household electrical appliances GB4706.1 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 Environmental conditions for application of electrical and electronic products Storage GB 4798. 1 E
GB4798.2 Environmental conditions for application of electrical and electronic products Transport 3 Terms
3.1 Household refrigerator (hereinafter referred to as refrigerator) household Refrigerating appliances An insulated box with appropriate volume and equipment for household use, which uses the means of consuming electrical energy to cool, and has one or more compartments, including refrigerators, refrigerator-freezers, and freezers. 3.2 Refrigerator
An insulated box with appropriate volume and equipment for household use, which uses the means of consuming electrical energy to cool, and has one or more compartments, including at least one refrigerator compartment.
3.3 Storage compartments3.3.1 Fresh food storage compartment A compartment used to store food that does not need to be frozen, and its temperature should be kept above 0℃. This room can also be divided into some small compartments. 3.3.2 Cellar compartment A compartment used to store certain special foods or beverages. Its temperature is slightly higher than that of the refrigerator compartment. Approved by the State Bureau of Technical Supervision on August 29, 1995, and implemented on August 1, 1996
GB/T 8059.1—1995
3.3.3 Low temperature compartment This room can be one of the following:
a. Ice-making compartment;
b. Frozen food storage room.
A refrigerator can have one or more low temperature compartments, or none. 3.3.4 Ice-making compartment A compartment specially used for freezing and storing ice cubes. 3.3.5 Frozen food storage compartments Compartments used for storing frozen food can be divided into: "one-star" level room, the storage temperature measured according to the specified test conditions and methods is not higher than -6°C; a.
b. "two-star" level room, the storage temperature measured according to the specified test conditions and methods is not higher than -12°C; c. The "two-star" grade part, a part of the "three-star" grade room, is not independent (i.e., there are local partitions, but no doors or covers for independent use), and the storage temperature of this part measured under the specified conditions is not higher than -12°C; d. The storage temperature of the "three-star" grade room measured under the specified test conditions and methods is not higher than -18°C. Note: In some cases, the room is allowed to have a "two-star" grade part (see B7 in Appendix B (Supplement)). 3.3.6 Chill compartment A compartment used to store perishable food. The temperature inside the compartment can be maintained between -2 and +3°C and the capacity can accommodate at least 2 "M\ bags.
3.4 General definitions3.4. 1 Top-opening type A refrigerator where food is taken in and out through the top door or lid.3.4.2 Upright type A refrigerator where food is taken in and out through the front door.3.4.3 Overall dimensionsWhen the door or lid is closed, the dimensions (length × width × height) of a rectangular parallelepiped connected to the inside of the refrigerator with a horizontal bottom are used to express it. Accessories are included, but handles are not included. If there are other protrusions, they should be stated separately.3.4.4 Overall space required inuse door or lid open, the total dimensions plus the space required for free circulation of cooling air when the refrigerator is in use and the space required for the door to be opened at the minimum angle when all accessories in the box enter and exit. Accessories include containers and shelves, as well as water trays that need to be taken out manually (see Figure 1). 1036
3.4.5 Volumes
3.4.5.1 Gross volume
GB/T 8059.1-1995
Width when door or lid is open
Total space required in use
The volume enclosed by the inner wall of the refrigerator with the door (or lid) closed. If forced air cooling is used, the volume of the space occupied by the air duct, evaporator, fan and other accessories should be subtracted from the gross volume.
3.4.5.2 Total gross volume volume is the sum of the gross volumes of the refrigerator compartment, cooling compartment, ice room, low temperature compartment, and freezer compartment (including the "two-star" grade part therein) (including whether there are independent compartments).
3.4.5.3 Effective volume storage volume The volume remaining after deducting the volume occupied by each component and those spaces that are deemed not to be used for storing food from the gross volume of any compartment is the effective volume of the compartment.
3.4.5.4 Rated effective volume rated.storage volume The effective volume marked by the manufacturer.
3.4.5.5 Total effective volume total storage volume The sum of the effective volumes of the refrigerator compartment, cooling compartment, ice room, low temperature compartment, and freezer compartment (including the "two-star" grade part therein). 3.4.5.6 Rated total effective volume rated total storagevolume the total effective volume marked by the manufacturer.
3.4.6 shelf
a shelf (or shelf) is a component with a certain mechanical strength on which food can be placed. The shelf can be fixed or movable. 3.4.7 load limit
the surface surrounding the effective volume of frozen food. 3.4.8 load limit line a permanent mark indicating the effective volume limit of frozen food. 3.5 definition relating to some performance characteristics3.5.1 energy consumption the energy consumption of a refrigerator in steady operation for 24 hours. It is measured at an ambient temperature of 25°C (SN, N, ST type) or 32°C (T type) according to the test method specified in 6.2.3. 3.5.2 rated energy consumption the energy consumption marked by the manufacturer.
3.5.3 Storage temperatures storage temperatures 3.5.3.1 Fresh food storage temperatures tm is the arithmetic mean of t1, tz and ts. t1, tz and ts are the average internal temperatures measured in the copper cylinder (6.1.4.1) at the measuring points specified in 6.1.5, i.e., within a complete control cycle (3.5.6), the arithmetic mean of the highest and lowest temperatures at each point (or the arithmetic mean of the temperatures when starting and stopping). 3.5.3.2 Frozen food storage temperaturesfrozen food storage temperatures is the hottest "M" package among the test packages placed in the frozen food storage room (the highest temperature value in Article 3.5.5 and Article 6.1.6.1.
3.5.3.3 Chilling compartment temperaturetem cellar compartment temperaturestem is the arithmetic mean of te1, tc2 and tea. te1, te2 and tes are the average internal temperatures measured in the mass cylinder (Article 6.1.4.1) at the measuring points specified in Article 6.1.5, that is, the arithmetic mean of the highest and lowest temperatures at each point in a complete control cycle (Article 3.5.6) (or the arithmetic mean of the temperatures when starting and stopping). 3.5.3.4 Chilling compartment temperaturetecmax, tecmin is the instantaneous maximum temperature and instantaneous minimum temperature of any "M" package among the "M" packages placed in accordance with Article 6.2.1. 3.5.4 The temperature rise of load time refers to the time difference between the moment when the hottest "M" package in the freezer (or box) or in any "three-star" room (or box) reaches -18°C and the moment when any "M" package (excluding the two-star part) first reaches -9°C under the specified test conditions when the refrigeration system is interrupted, that is, the load temperature recovery time.
3.5.5 Defrosting
There are three defrosting methods:
3.5.5.1 Automatically defrosted box There is no need to manually start the defrosting device during defrosting, and there is no need to manually restore its normal operation and drain the water in the box after defrosting, that is, the whole defrosting process is completed automatically.
3.5.5.2 Semi-automatically defrosting Defrosted defrost requires manual start of the defrost device, and the defrost is automatically restored to normal operation. The removal and treatment of defrost water can be manual or automatic.
Another type of semi-automatic defrost is that the defrost device does not need to be started manually during defrosting. After defrosting, it is not necessary to manually restore its normal operation, but the removal of defrost water is manual. 3.5.5.3 Manually-defrosted defrost requires manual start of the defrost device, and manual treatment is also required after defrosting. Restore its normal operation and remove the defrost water. However, there are also automatic removal and processing of defrost water.
Note: If the refrigerator has two or more compartments, the defrosting method of each compartment shall be described separately. 3.5.5.4 Frost-free
There is no accumulation of ice or frost on the surface of all stored food. 3.5.6 "M" package "M" package
A test package with a temperature sensing element of 50mm×100mm×100mm in the geometric center according to 6.1.2. 3.5.7 Control cycles
A refrigeration system controlled by a thermostat, in a stable operating state, between two adjacent startups or shutdowns is a control cycle.
3.5.8 Stable operating conditions1038
GB/T 8059.1-1995
In the case of cyclic operation of the refrigeration system, including any automatic defrosting cycle, when the temperature of each "M" package and copper cylinder at each corresponding point in the adjacent control cycle fluctuates within a range of ±0.5K, and the average temperature difference within a period of about 24h is not greater than ±1K, it is considered to have reached a stable operating state.
In the case of continuous operation of the refrigeration system, although the temperature changes to a certain extent, within 18h, the temperature rise and fall of all "M" packages and copper cylinders or brass cylinders does not exceed 0.5K, then it is considered to have reached a stable operating state. 3.5.9 Working time percentage Rpercentage running timeR Under the conditions of given ambient temperature and average temperature in the box, the percentage of working time is: R
Wu: R--percentage of working time;
d--the time the refrigeration system is running (on) within a certain integer control cycle; D--the total time of a certain integer control cycle. 3.5.10 Cooling speed cooling speed
Under the specified test conditions, the ambient temperature is 32C, and the refrigerator runs continuously under no-load conditions. The time required for the instantaneous temperature of each compartment to reach the requirements of Table 1.
3.5.11 Ice-making capacity refers to the amount of ice that the refrigerator can make within 24 hours, or the time required for the water in the ice box provided by the refrigerator to freeze into solid ice. 3.5.12 Ambient temperature ambient temperature The ambient temperature is the temperature of the space surrounding the refrigerator during the test. It refers to the arithmetic mean of the average temperatures tal and taz measured at two points 1 m above the ground and 350 mm from the vertical center line of the two side walls of the refrigerator. 3.6 Refrigerant
A fluid that transfers heat through phase change in a refrigeration system. It absorbs heat at low temperature and low pressure and releases heat at high temperature and high pressure. 3.7 Definition relating to compression-type appliances 3.7.1 Compression-type appliance The refrigeration process of a refrigerator is achieved by evaporating a liquid refrigerant at low pressure in an evaporator, and the resulting vapor is mechanically compressed into high-pressure vapor. It is then cooled in a condenser and restored to liquid refrigerant. 3.7.2 Hermetically sealed motor-driven refrigerating compressor The compressor and motor (or at least its moving parts) are installed in a sealed airtight casing by welding or other means, and generally cannot be disassembled after assembly. There are no moving parts outside the casing. 3.7.3 Hermetically sealed compressor refrigerating system This refrigeration system mainly consists of a motor-driven compressor, a condenser, a pressure reducing element, an evaporator and all other components containing refrigerant, which are permanently connected by the manufacturer by welding or other methods. 3.7.4 Refrigerant compressor A mechanical operating component that absorbs refrigerant vapor from the evaporator and discharges it into the condenser at a higher pressure. 3.7.5 Pressure reducing element An element that reduces the pressure of the refrigerant from the condensing pressure to the evaporation pressure. 3.7.6 Condenser
A heat exchanger in which the compressed vapor refrigerant is liquefied by transferring heat to the external cooling medium.
3.7.7 Evaporator
A heat exchanger in which the liquid refrigerant after pressure reduction is evaporated by absorbing heat from the cooled medium. 1039
3.7.8 Thermostat
GB/T 8059.1—1995
A device that automatically adjusts the operation of the refrigeration system according to the temperature of the evaporator or compartment. 4 Product classification
4.1 Refrigerators can be divided into the following categories according to their use:
Refrigerator (indicated by the Chinese Pinyin letter C); a.
b. Refrigerator-freezer (indicated by the Chinese Pinyin letter CD): Freezer (indicated by the Chinese Pinyin letter D). c.
4.2 According to the climate environment when the refrigerator is used, it is divided into: Category
Subtemperate type (SN)
Temperate type (N)
Subtropical type (ST)
Tropical type (T)
4.3 Model naming
Climate environment temperature
10~32℃
16~32℃
18~38℃
18~43℃
Improved design serial number is expressed in the order of Chinese phonetic letters. Specification code (effective volume L is expressed in Arabic numerals) Usage classification code (in 4.1)-Product code (household refrigerator)
Example: BC-150A
Indicates the first improved design of 150L refrigerator. 5 Technical requirements
Refrigerator should comply with the requirements of this standard and GB4706.13, and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 5.1 Use environment
Refrigerator should be able to be used under the following conditions. 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: 187242V,
Power supply frequency: 50±1Hz.
5.2 Effective volume
The effective volume unit is L.
10～32℃
10～38℃
10～43℃
5.3 Total effective volume
GB/T 8059.1-1995
The total effective volume of refrigerators shall be calculated in accordance with the provisions of Appendix B (Supplementary Part), and the calculated value shall not be less than 97% of the rated total effective volume. 5.4 Refrigeration performance
5.4.1 Storage temperature
When testing in accordance with Article 6.2.1, the temperatures of the cold storage room, cooling room and ice room shall comply with the provisions of Table 1 at the same time. For refrigerators with low-temperature rooms, while complying with the provisions of Table 1, the temperature of the frozen food storage room shall comply with the star-level temperature specified in Article 3.3.5 (see Table 1).
Table 1 Storage temperature
Cold room
Climate type
Ambient temperature
(See Article 3.5.3.1)
0≤ttts
t mmax
Note: The lower limit temperature of the ice room may not be lower than -4°C. 5.4.2 Ice-making capacity
Freezer and
"three-star" compartment
(see 3.5.3.2)
≤-18
"two-star" room and
"two-star" part
(see 3.5.3.2
and Appendix B7)
Cooling room
(see 3.5.3.3)
g≤ten
Ice greenhouse
(see 3.5.5.4)| |tt||2≤teem
temnx≤+3
8. When the ice-making capacity of the refrigerator is tested according to Article 6.2.2, the ice-making box provided by the manufacturer shall be used for assessment. The water in the ice box shall be completely frozen into solid ice within 2 hours;
b. If the manufacturer specifies the ice-making capacity for 24 hours, the water in the ice box shall be completely frozen into solid ice within the conversion time specified in Article 6.2.2.2. 5.4.3 Power consumption
When the power consumption is measured according to Article 6.2.3, the actual measured value shall not be greater than 11 of the rated value. 5%. 5.4.4 Defrost performance
Only automatic or semi-automatic defrosting refrigerators are assessed. According to 6.2.5, the following requirements must be met. a. After defrosting, it should be able to automatically resume normal operation; b. After defrosting, no frost or ice that affects normal operating performance should remain on the evaporator surface and in the drainage pipe. 5.4.5 Load temperature recovery time
The load temperature recovery time is expressed in minutes.
The refrigerator should have good thermal insulation performance and should be designed to make its load temperature recover slowly. When testing according to Article 6.2, the measured load temperature recovery time shall not be less than 300 minutes. If the manufacturer marks the rated value as not less than 350 minutes, the actual measured value shall not be less than 85% of the rated value.
5.5 Structure and material properties
5.5.1 Insulation performance and anti-condensation
The refrigerator should have good insulation performance, the insulation material should not have obvious shrinkage deformation, and it is not allowed to accumulate too much water vapor on the outer surface of the refrigerator during normal operation.
GB/T 8059.1—1995
When the refrigerator is subjected to the condensation test according to 6.3.1, no bead-like or running condensation is allowed to appear on the outer surface of the refrigerator. 5.5.2 Airtightness
When the door (or lid) is closed, there should be no pores in the wall of the refrigerator to allow air to enter the refrigerator. 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. Test according to 6.3.2 5.5.3 Durability of door hinges and handles
Door hinges and handles shall be strong and corrosion-resistant. According to the durability test in 6.3.3, the outer door of the refrigerator compartment (or cooling room, ice room) shall not be damaged after 100,000 opening and closing tests, and the airtightness shall not be damaged. After the test, it shall be subjected to the airtightness test in 6.3.2, and the result shall meet the requirements of 5.5.2. After the test, the fastening system can still make the door easy to open and close and maintain its good function. When the frozen food storage room (or freezer) of the refrigerator has a separate outer door, it shall not be damaged after 10,000 opening and closing tests in accordance with the durability test in 6.3.3, and the airtightness shall not be damaged. After the test, it shall be subjected to the airtightness test in 6.3.2, and the result shall meet the requirements of 5.5.2.
5.5.4 Shelves and containers
Shelves, containers and similar parts shall have sufficient mechanical strength. After the mechanical strength test in 6.3.4, there shall be no deformation that loses the original function, especially the sliding and rotating parts. They shall also be able to move completely when loaded with cylindrical loads. Shelves, containers and similar parts designed to be removable shall be easy to remove during use. 5.5.5 Internal materials of refrigerators
Internal materials of refrigerators and their accessories shall not produce or transmit odor to food during normal use. When the odor test is carried out in accordance with 6.3.5, the evaluation value (average value) shall not be greater than 1.
Internal materials of refrigerators shall not contaminate the stored food when in contact with the stored food, nor shall they transmit toxic substances to the food. The materials shall be resistant to moisture and food acids.
All surface coatings for use shall be impact-resistant, have appropriate strength, uniform color, smooth, easy to clean and resistant to moisture and food acids. 5.5.6 Sealing performance of refrigeration system
The refrigeration system shall be sealed. When leak detection is carried out in accordance with Article 6.3.6, the annual leakage of refrigerant in any part shall not exceed 0.5g. 5.5.7 Noise and vibration
5.5.7.1 When the refrigerator is in operation, no obvious noise shall be generated. When measured in accordance with Article 6.3.7.1, the noise sound power level of refrigerators below 250L (including 250L) shall not exceed 52dB(A); refrigerators above 250L shall not exceed 55dB(A). 5.5.7.2 When the refrigerator is in operation, no obvious vibration shall be generated. When measured in accordance with Article 6.3.7.2, the effective value of the vibration velocity shall not exceed 0.71 mm/s.
5.5.8 Electroplating parts
After the metal electroplating parts of the refrigerator are subjected to the salt spray test according to 6.3.8, the surface corrosion of the electroplating layer shall be checked. The number of metal rust spots and rust marks on the coating shall not exceed 2 per 100cm2, and the area of each rust spot and rust mark shall not exceed 1mm. When the surface area of the test piece is less than 100cm, rust spots and rust marks are not allowed.
5.5.9 Surface coating
After the surface coating of the refrigerator is tested according to 6.3.9 and 6.3.10, the coating surface shall be checked. The appearance shall be good, and no obvious pinholes are allowed. In any 100cm2 square area of the sample surface, there shall be no more than 2 bubbles with a diameter of 0.5 to 1mm, and bubbles with a diameter of more than 1mm are not allowed.
5.5.10 Appearance requirements
The appearance shall not have obvious defects, and the decorative surface shall be flat and bright. The coating surface should be smooth and bright, with uniform color, and should not have obvious blisters, scratches, pits, wrinkles, bubbles, missing coatings, and nested sand particles. The decorative coating of electroplated parts should be smooth and fine, with uniform color, and should not have defects such as spots, pinholes, bubbles, and coating peeling. The surface of plastic parts should be flat and smooth, with uniform color, and should not have defects such as cracks, bubbles, obvious shrinkage holes and deformation. 1042
GB/T8059.1-1995
Nameplates and cutting marks should be complete, and the nameplate should meet the requirements according to the inspection of Article 8.1.1. 5.6 Requirements for refrigerator structure and design
Refrigerator design should have appropriate anti-condensation measures. Facilities for collecting, draining and treating defrosting water should be designed. Dust accumulation should be avoided and reduced as much as possible when designing the condenser. The evaporator should be designed to prevent damage during normal use. It should be made of non-toxic and corrosion-resistant materials. The coating or plating used to protect the surface of the evaporator should be corrosion-resistant, non-toxic, and temperature-resistant. For components that may be replaced, such as switches, light bulbs, thermostats, etc., they should be installed in places that are easy to operate, replace, and safe. When designing the refrigeration system, the materials should have sufficient strength and should not be degraded by the effects of refrigerants, lubricants or other mixtures.
Freezers and "three-star" frozen food storage rooms should have load limit lines (see Figure 2), but they may not be set in the following cases: any space within the gross volume of the compartment is suitable for storing food under "three-star storage conditions; a.
The load limit line is specified by a special structural form, such as a basket, baffle, etc.; b.
The load limit is determined by natural limit (see Appendix A Figure A1). c.
The load limit line should be marked clearly and not faded, and can be marked with one or more load limit lines. The size of the mark can be reduced proportionally, but it cannot be less than half of the specified size.
100~150
This edge represents the load limit
Figure 2 Load limit line mark
6 Test method||t t||6.1 General test conditions
6.1.1 Test room
The refrigerator is placed in this laboratory for testing according to the method in 6.1.1.4. The ambient temperature in the test room is adjustable within the range of 10 to 43°C. 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 3.5.12.
If multiple refrigerators are tested at the same time, their environmental parameters should be the arithmetic mean of the values measured at the specified points of each refrigerator. 1043
6.1.1.1 Ambient temperature
8. Test storage temperature
10 and 32°C
16 and 32°C
18 and 38°C
18 and 43°C
GB/T 8059.1-1995
b. When doing other tests, follow the test requirements and temperature. When it is required to reach a stable operating state and during the test, the temperature at each specified measuring point (Article 3.5.12) should maintain the specified ambient temperature, and its fluctuation range is within ±0.5K. Within a range of 2m from the test platform (Article 6.1.1.4), the vertical temperature gradient should not exceed 2K/m. 6.1.1.2 Ambient humidity
Unless otherwise specified, the relative humidity in the test room should generally be 45%-75%. 6.1.1.3 Ambient air velocity
The air velocity in the test room should not be greater than 0.25m/s. 6.1.1.4 Installation of refrigerators
Each refrigerator shall be placed on a solid wooden test platform painted matte black. The platform shall be open below to allow free air circulation. The top of the platform shall be 300mm above the test room floor. The platform shall extend outwards at least 300mm but not more than 600mm beyond the two side walls and the front wall of the refrigerator. The rear side of the platform shall extend to the vertical partition at the back of the refrigerator. The air circulation around the refrigerator shall be limited by three vertical partitions painted matte black around the refrigerator. The rear partition shall be parallel to the back of the refrigerator and close to the limiter at the back of the refrigerator, or keep a distance from the back of the refrigerator as required by the manufacturer. The left and right partitions shall be parallel to the two side walls of the refrigerator and 300mm apart. The width of the partitions is 300mm (see Figure 3). The three vertical partitions shall be continuous and uninterrupted and fixed to the test platform. The height of the partitions shall be at least 300mm above the top of the refrigerator. The refrigerator shall be placed to prevent direct radiation from cold and heat sources in the test room. The refrigerator shall be away from other objects in the test room to eliminate the influence of objects with different temperatures from the ambient temperature. When built-in refrigerators are combined with other appliances (non-refrigerating appliances), the test should be carried out in the combined state, but the other appliances in the combination are not in operation.
Dimensions are in meters
Figure 3 Partitions restricting air circulation (plan view)6.1.2 Test package
When a refrigerator with a load is to be used for various performance tests, a test package with a rectangular parallelepiped shape should be used. 6.1.2.1 Test package dimensions and their allowable deviations The dimensions of the test package before freezing and the mass of the contents are shown in Table 2.1044
Dimensions, mm
25×50×100
50×100×100
50×100×200
Allowable deviation of length dimension:
GB/T 8059.1-1995
Test package dimensions and mass
a. When the size is 25mm and 50mm, the allowable deviation is ±1.5mm. b. When the size is 100mm and 200mm, the allowable deviation is ±3.0mm. The allowable deviation of mass is ±2%.
6.1.2.2 Composition of test package
The test package consists of the following ingredients:
a. Each 1000g of filling material contains:www.bzxz.net
Hydroxyethyl methylcellulose
Sodium chloride
Parachlorometa-cresol
The freezing point of this filling material is -1℃, and its thermal properties are equivalent to lean beef. Quality
The packaging material is a layer of plastic film or a suitable material with negligible water vapor exchange with the ambient medium. After filling, the packaging material is immediately sealed. Note: ① In order to compensate for the water evaporated during the preparation of the filling material, it is recommended to add 4% water. ② A laminated film can be used, which is a laminated film bonded together by a layer of easily sealed 120μm thick high pressure ethylene film and a layer of about 12.5μm thick polyester film on the outside. When measuring the ice chamber, a test package with a freezing point of -5℃ must be used. c.
Hydroxyethyl methylcellulose
Sodium chloride
P-chloro-meta-cresol
This type of test package cannot be used in the test of freezing capacity and load temperature recovery time. 6.1.2.3"M" package
The "M" package or measuring package refers to a test package with a mass of 500g (Article 6.1.2.1), in which a thermocouple for temperature measurement is installed at its geometric center, and the thermocouple is in direct contact with the filling material. Measures should be taken to minimize heat conduction from the outside. 6.1.3 Preparation before the test
The refrigerator test should be carried out at the rated voltage and rated frequency, or within the range of (100 ± 1)% of the average value of the rated voltage. Before the test, the refrigerator should be placed in the environmental conditions specified in Article 6.1.1.1 and left to stand naturally (with the refrigerator door open) to allow the temperature inside the box to reach equilibrium with the ambient temperature, and the maximum temperature difference between them should not exceed ± 1K . The refrigerator can be tested only after equilibrium is reached. 6.1.3.1 Setting of the thermostat
If the thermostat is adjustable, it shall be adjusted to the specified position according to the test requirements; if the thermostat is not adjustable (the manufacturer has adjusted it but it is not available for users to adjust), it shall be tested according to the delivery status; b.
If the manufacturer's manual has provisions, it shall be adjusted according to the manual. c.
6.1.3.2 Anti-condensation heater
If the refrigerator is equipped with an anti-condensation electric heater, except for the power consumption test and condensation test, the electric heater shall be 1045
GB/T8059.1—1995
Turn on. If the electric heater is adjustable, it should be adjusted to the maximum heating position. 6.1.3.3 Accessories and parts in the refrigerator
At the beginning of the test, various accessories and parts in the refrigerator should be in normal positions, the ice box and all containers, shelves, etc. should be empty (unless otherwise specified), the evaporator should be free of frost and ice, and the accessories and inner walls in the box should be dry. If the refrigerator is equipped with a cold storage device (unless it cannot be removed), the cold storage device should be removed during type inspection. If there is an additional electric heater in the refrigerator, only one working state, either turned on or off, is selected during type inspection, which is determined by the manufacturer. The leads connecting the temperature measuring element in the box to the measuring instrument will not affect the airtightness of the refrigerator. 6.1.4 Measurement Measuring instruments
6.1.4.1 Temperature measuring instruments
Temperature measurement shall be carried out using thermocouples or other measuring devices of equal accuracy. The temperature sensing part shall be inserted into the test package (Article 6.1.2.3) or into the center of the tinned copper cylinder. The mass of the tinned copper cylinder is 25g, and the diameter and height are both approximately 15.2mm.
The temperature measuring instrument shall be accurate to ±0.3K during type inspection and to ±1K during factory inspection. 6.1.4.2 Humidity measuring instruments
Relative humidity shall be measured using a dry-bulb and wet-bulb thermometer. It shall be accurate to ±0.3K during type inspection and to ±1K during factory inspection. 6.1.4.3 Electrical measuring instruments
Ammeters, voltmeters, power meters, etc. in electrical instruments shall have an accuracy of not less than 0.5 during type inspection and not less than 1.0 during factory inspection.
6.1.4.4 Other measuring instruments
Noise measuring instruments shall use sound level meters of type I or above specified in GB3785 or other test instruments with equivalent accuracy. The vibration test instrument is required to have a frequency response range of 10 to 1000Hz. The relative sensitivity within its frequency range shall be based on the relative sensitivity of 80Hz, and the relative sensitivity of other frequencies shall not exceed -10% to +20%. The sensitivity of the leak detector shall not be greater than the annual leakage of 0.5g. 6.1.5 Determination of the temperature of the cold storage room, cooling room and ice room The temperature of the cold storage room, cooling room and ice room is represented by tm, tem and tc. respectively. tm and tem are the arithmetic mean of t1, t2~ts and te1, t:2, tea respectively. Temperatures t1vtz, t and tal~te2, tes should be measured in the copper cylinder. The copper cylinder should be hung and placed at three measuring points T1, T2, T: and Tl, Tcz, Tc3 in the center between the rear inner wall of the refrigeration room and the inner wall of the door (when closed) (see Figure 4-1, Figure 4-2, Figure 4-3). T
Note: It refers to the temperature measuring point measured in the "M" package 1046
Figure 4-1 Temperature measuring points of the refrigeration room
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