This standard specifies the types and basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage of large ice-making equipment. This standard applies to large ice-making equipment with R717 as refrigerant, white ice produced by indirect brine cooling, and a daily output of more than 10 tons. Small ice-making equipment, transparent ice-making equipment and Freon ice-making equipment can also be used as a reference. JB/T 7222-1994 Large Ammonia Ice-making Equipment JB/T7222-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Large Ammonia Ice Making Equipment
1 Subject Content and Scope of Application
JB/T 7222 --- 94
This standard specifies the type and basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage of large ice making equipment. This standard is applicable to large ice making equipment (hereinafter referred to as ice making equipment) with a daily output of more than 10 tons, which uses R717 as a cooling agent and produces white ice in the form of indirect cooling with brine. Small ice making equipment, transparent ice making equipment and Freon ice making equipment can also be used for reference. 2 Reference standards
GB 191
GB1497
GB4600
GB4601
GB5657
GB6067
GB 6388
GB7190
GB9237
Packaging, storage and transportation pictorial symbols
Basic standards for low-voltage electrical appliances
Artificial ice
Ice bucket
Technical conditions for single-stage single-suction clean water centrifugal pumps
Safety regulations for lifting machinery
Transport packaging, receiving and shipping symbols
Glass fiber reinforced plastic cooling towers
General technical specifications for refrigeration equipment
GB 10875
Technical conditions for medium-sized piston single-stage refrigeration compressors GB/T13306 plate
JI31036
JB4337
JB4338
JB4339
JB4341
JB4347
General bridge crane#
Technical conditions
Ammonia storage tanks, low-pressure circulating ammonia storage tanks, ammonia storage tanks for ammonia refrigeration equipment Technical conditions for liquid separators and oil collectors Technical conditions for vertical condensers, horizontal condensers and horizontal evaporators for ammonia refrigeration units Technical conditions for evaporative condensers for ammonia refrigeration units Technical conditions for vertical tube evaporators and spiral tube evaporators for ammonia refrigeration units Technical conditions for mixers for refrigeration units
JB/T5446 Technical conditions for medium-sized piston single-unit two-stage refrigeration compressors JB/T6906 Oil-injected screw single-stage refrigeration compressors 3 Types and basic parameters
3.1 Type
Indirect ice-making method with R717 as refrigerant and brine as coolant, semi-continuous operation, ice buckets in groups, crane-mounted. 3.2 Model
The model of ice-making equipment consists of uppercase Chinese pinyin letters and Arabic numerals, and is expressed as follows: Approved by the Ministry of Machinery Industry of the People's Republic of China on July 18, 1994 and implemented on July 1, 1995
3.3 Model example
Block ice weight: number, kg
JB/T 7222-
-Ice making capacity: number, t/24h
Basic code for ice-making equipment
24h ice making 30tThe model of ice-making equipment with a block ice weight of 50kg is ZB30/50. 3.4 Basic parameters
3.4.1 Basic parameters of ice buckets
3.4.1.1 Ice buckets are divided into four specifications according to the weight of block ice: 50, 100, 125 and 135kg. 3.4.1.2 The shape and basic dimensions of the ice bucket are shown in Figure 1 and Table 1.0
中由由由由
Ice bucket specifications
3.4.2 Ice-making capacity of ice-making equipment
The ice-making capacity of ice-making equipment is: 10, 15, 20, 25, 30, 40, 60t/24h. 1236
?中中www.bzxz.net
雪香香
4 Technical requirements
4.1 General requirements
JB/T 7222—94
Ice-making equipment shall be manufactured in accordance with the provisions of this standard and in accordance with the drawings and technical documents approved through the prescribed procedures or in accordance with the agreement between the supply and demand parties. 4.2 Basic requirements
4.2.1 Nominal operating conditions
Ice making water temperature: 25℃;
Condenser cooling water temperature: 32℃;
Ice making pool brine temperature: 10～-12C.
4.2.2 Nominal ice making capacity
Under nominal operating conditions, the ice making capacity shall meet the design requirements and shall not be less than 98% of the design capacity. 4.2.3 Block ice quality
4.2.3.1 Block ice weight deviation is ±3%.
4.2.3.2 Block ice hollowness is not more than 8%.
Note: Hollowness is the ratio of the hollow volume of a block ice to the volume of the block ice. 4.2.3.3 Block ice shall be complete and dense in appearance, without obvious impurities, white in color, and translucent or transparent. 4.2.4 Power consumption
Under nominal working conditions, the power consumption of ice-making equipment shall not exceed 55kW·h/t. 4.2.5 Safety requirements
4.2.5.1 The design, manufacture, installation and operation of ice-making equipment shall comply with the safety provisions of GB9237. 4.2.5.2 The low-voltage electrical equipment matched with ice-making equipment shall comply with the safety provisions of GB1497. 4.2.5.3 The crane used for ice lifting shall comply with the safety provisions of GB6067. 4.2.6 Environmental conditions
The ice-making equipment shall be able to work normally at an ambient temperature of 43℃. 4.3 Refrigeration compressor units and refrigeration accessories 4.3.1 The refrigeration compressor used in ice-making equipment shall comply with the provisions of GB10875, JB/T5446 and JB/T6906. 4.3.2 Refrigeration accessories for ice making equipment should be selected in conjunction with the refrigeration compressor unit and should comply with the provisions of JB4337~4339 and JB4341.
4.4 Cooling tower and water pump
The cooling tower and water pump should be selected in conjunction with the condenser. The cooling tower should comply with the provisions of GB7190, and the water pump should comply with the provisions of GB5657. 4.5 Mixer
The mixer should be selected in conjunction with the ice making pool and evaporator according to the ice making capacity so that the brine reaches the required flow rate without dead corners and should comply with the provisions of JB4347.
4.6 Ice bucket
The ice bucket should comply with the provisions of GB4601.
4.7 Ice bucket waterer
4.7.1 The ice bucket waterer is welded with steel plates. The deformation and welding quality should be controlled during assembly welding. After manufacture, a water filling test should be carried out to ensure no leakage. 4.7.2 The quality of accessories such as float valve, drain valve, rubber hose, etc. provided by the ice bucket water adder shall meet the design requirements. 4.7.3 The ice bucket water adder shall be installed straight and without skew to ensure even water distribution. 4.7.4 After the welding parts of the ice bucket water adder are assembled and welded, their surfaces shall be cleaned and painted with anti-rust paint. 4.7.5 The ice bucket water adder shall ensure that the amount of water poured into each ice bucket is consistent and meets the requirements of the hollowness and deviation of the nominal weight of the ice block. When producing hollow ice, the amount of water shall be appropriately increased. 4.8 Ice pool
JB/T 7222 -- 94
4.8.1 The ice pool is welded with steel plates. The deformation and welding quality shall be controlled during assembly and welding. After production, kerosene penetration or water storage test shall be carried out to ensure no leakage.
4.8.2 The depth of the ice pool should ensure that the distance from the bottom of the ice bucket to the bottom plate of the ice pool is 50~100mm. 4.8.3 The inner surface of the ice pool should be painted with waterline paint. The metal surface should be cleaned and kept dry before painting. 4.9 Ice Melting Tank
4.9.1 The ice melting tank can be equipped with a transmission device to make it swing to reduce the melting time. 4.9.2 The weld should not leak.
4.9.3 The ice melting tank should be treated with anti-rust treatment. After welding, the surface should be cleaned and painted with anti-rust paint. 4.70 Ice Bucket Stand
4.10.1 The ice bucket stand should be straight and without obvious deformation. The size of the frame on the upper edge of the ice bucket should be controlled so that the ice bucket can be placed smoothly and will not fall off. 4.10.2 After welding, the surface of the ice bucket stand should be cleaned and painted with anti-rust paint. 4.11 Ice pourer
4.11.1 The ice pourer should be firmly installed and flexible to turn. 4.11.2 The contact area between the ice pourer and the ice bucket should be covered with wood, rubber and other materials to avoid hard collision. 4.11.3 The surface of the ice pourer should be cleaned and painted with anti-rust paint. 4.12 Crane for ice lifting
A double-hook crane specially used for ice lifting can be selected and shall comply with the provisions of JB1036. Other lifting equipment can also be selected. 4.13 Requirements for completeness
Ice-making equipment consists of the following parts:
Refrigeration compressor unit and its auxiliary devices:
Refrigeration auxiliary equipment;
Cooling tower and water pump;
Mixer;
Ice bucket;
Ice bucket water filler;
Ice pool;
Ice melting trough;
Ice bucket rack;
Ice pourer;
Crane for ice lifting.
4.14 Warranty period
If the user complies with the provisions of the product manual, the manufacturer shall repair or replace the ice-making equipment free of charge within 18 months from the date of shipment from the manufacturer if the ice-making equipment is damaged or fails to work properly due to poor manufacturing quality. 5 Test method
5.1 Nominal ice-making capacity and power consumption test
5.1.1 Test conditions
The test shall be carried out according to the nominal working conditions specified in Article 4.2.1, and the air temperature in the ice-making room shall be 15-20℃. When the temperature of the ice-making water deviates from the nominal working conditions, correction and conversion are allowed. 5.1.2 Test procedure
The continuous ice-making test shall be carried out under the specified nominal working conditions. The test shall start from adding water to the ice bucket, continue for three complete freezing and de-icing cycles, and end before the fourth water addition. The cycle time, ice-making volume and power consumption shall be recorded once for each cycle. 5.1.3 Calculation of test results
5.1.3.1 Calculation of nominal ice-making capacity
The nominal ice-making capacity is calculated according to formula (1):
Wherein: G nominal ice-making capacity, t/24 h; JB/T 7222
Gi+G2+G
C, + C + C
Gi.G2, G are the ice-making amounts of the first, second and third cycles respectively, t, C.C2.C3-
are the time of the first, second and third cycles respectively, h. 5.1.3.2 Calculation of power consumption
Power consumption is calculated according to formula (2):
E +E→E
G +Ga+ G
Where: E. Power consumption per ton of ice produced, kw·h/t; Et, E2, Es are the power consumption of one, two, and three cycles respectively, kW·h. 5.2 Block ice quality inspection
? (1)
. (2)
5.2.1 While carrying out the test in 5.1, the weight deviation, hollowness and appearance quality of the block ice shall be randomly inspected. The inspection method shall be in accordance with the provisions of GB4600.
5.2.2 At least two blocks shall be randomly inspected at the maximum, middle, and minimum brine flow rates, and a random inspection shall be conducted once in each ice making cycle, with no less than six blocks each time. 6 Inspection rules
6.1 Ice-making equipment shall be inspected and qualified by the quality inspection department of the manufacturer according to this standard and relevant standards and technical documents (according to the agreement between the user and the manufacturer) before it can leave the factory.
6.2 Acceptance inspection
According to the needs of the user, the following inspections shall be carried out on site after the ice-making equipment is installed: a.
Nominal ice-making capacity;
Number of ice blocks;
Power consumption
7 Marking, packaging and storage
7.1 Marking
Each set of products shall have a label fixed on a conspicuous and flat part of the water dispenser. The size and technical requirements of the label shall comply with the provisions of GB/T13306. The following contents shall be marked on the label at least: a.
Manufacturer name;
Product model and name;
Nominal ice-making capacity;
Ice bucket specifications;
Factory number;
Factory date.
7.2 Packaging
The markings on the product packaging box shall comply with the provisions of GB191 and GB6388. The following contents shall be clearly marked on the packaging box: Shipping station and manufacturer name;
Arrival station and consignee name;
Product model and name:
Net weight, gross weight;
Overall dimensions;
JB/T 722294
“Handle with care”, “Upward”, “Avoid moisture” and lifting position and other signs. The following documents should be carried with the product when it leaves the factory:
Packing list:
Product certificate;
Product manual.
The product should be stored in a dry and ventilated place.
Additional instructions:
This standard was proposed and managed by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Dalian Refrigeration Factory. The main drafters of this standard are: Jin Naigu and Li Muzhen. 1240
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