MZ/T 137-2019General technical conditions for the remains refrigerator (English PDF)

4.1 Type

The types of corpse freezer are mainly single type and combined type.

4.2 Basic parameters

4.2.1 Number of frozen remains. 1-9.

4.2.2 Rated temperature. -18 °C

4.2.3 Power supply. single-phase 220 V or three-phase 380 V, frequency 50 Hz.

4.2.4 Dimensions of single dead body freezing space. the length is not less than 1.90 m, the width is not less than 0.60 m, and the height is not less than 0.40 m.

5.1 Working conditions

5.1.1 Environmental conditions

The corpse freezer should be able to work normally when the ambient temperature is 0 °C ~ 43 °C and the relative humidity is not more than 90%.

5.1.2 Power fluctuation range

Voltage. single-phase 220V ± 10%, three-phase 380V ± 10%.

Power frequency. (50 ± 1) Hz.

5.2 The deviation between the measured value of the external dimensions of the body refrigerator and the nominal external dimension of the drawing shall not be greater than ± 0.5%.

5.3 Refrigeration performance

5.3.1 Freezing temperature

After the corpse freezer has reached stable operation, the temperature of the freezer should be between -18 °C and 0 °C.

5.3.2 Freezing speed

After the dead body freezer is started, the temperature of the freezer reaches -18 °C, and the continuous operation time is required to not exceed 3 hours.

5.3.3 Power consumption

The body freezer is normally operated for 24 hours, and the measured value of its power consumption shall not be greater than 115% of the rated value.

5.3.4 Working time coefficient of refrigeration system

After the dead body freezer has reached a stable operating state, the working time of the refrigeration system should not be greater than 60% of the working time of the dead body freezer.

5.3.5 Temperature uniformity

After the dead body freezer has reached a stable operating state, the temperature difference between the measurement points in the freezer should not be greater than 4 ° C.

5.3.6 Temperature Fluctuation

After the dead body freezer has reached a stable operating state, the average temperature fluctuation in the freezer should not be greater than 4 ° C.

5.3.7 Working noise

When the body freezer is working normally, the cabinet noise should not be greater than 55dB (A).

5.3.8 Working vibration

When the dead body freezer is working normally, the cabinet vibration shall meet the requirements of Article 5.7.1 of GB/T 8059-2016.

5.3.9 Tightness of refrigeration system

The tightness of the refrigeration system shall meet the requirements of Article 3.56 of GB/T 8059-2016.

5.3.10 Display and alarm

The freezer should have the temperature display and alarm function in the cabinet.

5.4 Structure and material properties

5.4.1 Thermal insulation and anti-condensation

The corpse freezer should have good thermal insulation performance, and the thermal insulation material should not have obvious shrinkage and deformation with temperature changes. During normal work, freezing There should be no bead-like or running-grade condensation on the exterior surface of the cabinet.

5.4.2 Cabinet door sealing performance

After the door of the freezer cabinet is closed, there should be no holes to allow air to enter the freezer. After the cabinet door is closed, the door seal should be tight all around.

5.4.3 Durability of door hinges, handles and locks

Door hinges, handles and locks should be strong and resistant to corrosion. After the door is opened and closed 100,000 times, it should not be damaged, and its airtight performance Destruction, the results shall meet the requirements of 5.4.2.

5.4.4 Internal structural performance

The structure design of the corpse freezer should ensure the storage of the corpse is clean, and defrost water and ice must not touch any part of the corpse.

5.4.5 Remains shelf strength and performance

5.4.5.1 Under a load of 150Kg, the remains of the remains shall not be damaged and permanently deformed.

5.4.5.2 Removal and transfer of corpse shelves from the freezer shall be light and flexible.

5.4.6 Surface coating performance

The plating requirements of electroplated parts shall meet the requirements of Article 20.2 of GB/T 8059-2016.

5.4.7 Surface coating properties

The surface coating requirements shall meet the requirements of Article 21.2 of GB/T 8059-2016.

5.4.8 Performance of refrigeration system and piping

Refrigeration compressors and system piping should be neatly arranged, tightly connected and firm.

5.4.9 Cabinet Structure and Performance

The door and the cabinet must be assembled firmly, straight, and flexible to open and close.

5.4.10 Appearance requirements

The appearance of the corpse freezer should be flat, smooth, and there should be no obvious scratches.

6.1 Test conditions

6.1.1 The ambient temperature is (15 ± 1) ° C, (32 ± 1) ° C, (40 ± 1) ° C. The location of the temperature measurement point is 1m from the ground and from the front table of the freezer the left and right symmetrical centerline of the face is 0.25 m.

6.1.2 The relative humidity of the environment is 45% ~ 90%. The measurement position is the same as that of the ambient temperature measurement point.

6.1.3 The temperature difference between the ambient temperature measurement point and 0.05 m above the ground shall not exceed 2 ° C.

6.1.4 The air flow speed of the test environment shall not exceed 0.25 m/s. The measurement position is the same as the ambient temperature measurement position.

6.1.5 The fluctuation range of the test power supply voltage shall not be greater than ± 1% of the rated voltage.

6.1.6 The remains rack can be removed during the test.

6.2 Measuring instruments

6.2.1 Thermocouples shall be used for temperature measurement. The accuracy of the temperature measuring instrument shall be ± 0.3 °C. The temperature sensing elements shall be placed on a diameter and height.

Both are 15.2 mm copper cylinder centers.

6.2.2 The relative humidity measuring instrument adopts a dry and wet bulb thermometer with a scale value not exceeding 0.5 °C or an instrument with the same accuracy or higher.

6.2.3 The accuracy of voltmeter, ammeter and power meter is 0.5, and the accuracy of watt-hour meter is 1.

6.3 Performance test

6.3.1 Freezing temperature test. When the ambient temperature is 15 °C, 32 °C, 40 °C, start the corpse freezer and determine whether the corpse freezer reaches the temperature inside the cabinet after stable operation.

6.3.2 Rated stability and freezing speed test. When the ambient temperature is 32 ° C, close the cabinet door. Measurement remains freezer started to work in the freezer Time required for the inner midpoint temperature to drop to -18 ° C.

6.3.3 Power consumption test. When the ambient temperature is 32 °C, the freezer remains stable and the temperature in the freezer is stable at -18 °C at that time, measure the power consumption of the corpse refrigerator in normal operation for 24 hours.

6.3.4 Test of working time coefficient of refrigeration system. When the ambient temperature is 32 °C, the remains freezer has reached a stable operating state, and the temperature in the cabinet when it is stable at -18 °C ~ 0 °C, record the on and off time of 5 cycles, and calculate the working time coefficient of the refrigeration system (the refrigeration system works the time factor is equal to the total on time of the refrigeration system divided by the total operating time and then multiplied by 100%).

6.3.5 Temperature uniformity test. When the ambient temperature is 32 °C and the relative humidity is 45% to 90%, the dead body freezer reaches a stable operating state.

And when the temperature in the freezing chamber is stable at -18 °C, measure the temperature value of the measuring point in the refrigeration chamber at the moment of stopping the operation, and calculate the difference between the maximum and minimum values.

6.3.6 Temperature fluctuation test. When the ambient temperature is 32 °C, the freezer remains stable and the temperature in the freezer is within at -18 °C ~ 0 °C, measure the temperature at the measuring point in the refrigerating room at the instant of starting and stopping and calculate the difference between the maximum and minimum values.

6.3.7 Adiabatic performance test. When the ambient temperature is 32 °C and the relative humidity is 45% to 90%, the dead body freezer reaches a stable operating state.

And when the temperature in the freezing chamber is stable at -18 °C, after the corpse freezer works normally for 1 hour, observe the exterior surface of the corpse freezer for condensation.

6.3.8 Noise and vibration test of corpse freezer. Tested in accordance with Article 22 of GB/T 8059-2016.

6.3.9 Sealing performance test of refrigeration system

The dead body freezer is placed in a positive pressure room, and the ambient temperature is within the range of normal working conditions. The leak detector is adjusted to an annual leakage of 0.5 g.

Leak detection shall be performed on any part of the refrigeration system of the freezer, and the result of the leak detection shall meet the requirements of 5.3.9.

6.4 Structure and material performance test

6.4.1 Condensation test. Test in accordance with Article 17 of GB/T 8059-2016.

6.4.2 Cabinet door sealing performance test.

a) During the test, place a piece of paper with a thickness of 0.08mm, a width of 50mm, and a length of.200mm at any position on the door seal, and then close the door.

Check if the paper slips freely.

b) Close the cabinet door and illuminate the cabinet. You can find out the air tightness by checking the door seal for light leakage.

This test shall be performed after the durability tests of the door hinges, handles and locks. Check whether the air tightness can be guaranteed.

Meet the technical requirements of this standard.

6.4.3 Strength test of corpse stretcher. Put a load of 100 kg evenly on the corpse rack, remove the load after 4 hours, and check whether there is any Damage and permanent deformation.

6.4.4 Electroplated parts and surface coating test. Test in accordance with the provisions of Articles 21 and 22 of GB/T 8059-2016.

6.4.5 Door hinge, handle and lock endurance test. Test in accordance with the requirements of Article 10 of GB/T 8059-2016.

6.4.6 Appearance test. visually.

7.1 Inspection types

The test of the body freezer is divided into factory inspection and type inspection.

7.2 Factory test

The body freezer submitted for delivery shall be subject to factory inspection. The inspection items include all items specified in this standard.

The quality inspection department of the manufacturing unit decides on its own.

7.3 Type test

The type shall include all the items required by this standard and shall be carried out in batches. In the following cases, the body freezer shall be type tested Check.

a) trial production of new products;

b) when there is a significant change in design, process or materials used;

c) products in continuous production, not less than once a year;

d) Reproduction after a lapse of more than one year.

8.1 Logo

8.1.1 Each dead body freezer shall have a durable nameplate and circuit diagram at appropriate and obvious locations. The following contents should be clearly marked on the nameplate Content.

a) product brand, name, model;

b) protection against electric shock;

c) total effective volume, L;

d) rated voltage, V;

e) rated frequency, Hz;

f) input total power, W;

g) power consumption, kW - h/24h;

h) the name and quantity of refrigerant, g;

i) the name of the manufacturer;

j) manufacturing date and number;

k) Weight, kg.

8.1.2 Each corpse freezer shall be accompanied by the following documents.

a) The instruction manual shall include 8.1.1 items and matters concerning the installation, use and maintenance of the product;

b) packing list (including the list of accessories,, etc.);

c) inspection certificate;

d) Product warranty.

8.1.3 Trademarks

The body freezer should have a registered trademark.

8.1.4 Packaging mark

Non-fading pigments shall be applied on the outer surface of the packaging box, and the following signs shall be clearly marked;

a) the full name of the manufacturing unit;

b) product name and model;

c) grades and trademarks;

d) product color;

e) Net weight, kg;

f) gross weight, kg;

g) package dimensions, length × width × height (mm);

h) Precautions for storage and transportation are indicated. be careful in handling, moisture-proof, upward, and the number of layers or symbols, patterns, etc. And meets GB 191 Relevant provisions in the.

8.2 Packaging

8.2.1 The corpse freezer should be packed in a firm packing box, and it is required that the packing box is not significantly damaged or deformed. No looseness of the internal product during transportation Scattered, damage and obvious displacement, the performance of the product remains unchanged.

8.2.2 The packaging of the dead body freezer should be protected against moisture, dust, and shock, which is sufficient to ensure that the product does not Damaged by shock, handling, humidity, and ingress of dust.

8.3 Transport and storage

8.3.1 During transportation and storage, they should not be hit, over-tilted or exposed to rain or snow.

8.3.2 The product should be stored in a dry and well-ventilated warehouse at a temperature lower than 40 °C, and there should be no corrosive gas around it.

8.3.3 Product packaging should be repacked if it needs to be stored after disassembly.

references

[1] GB/T 23287-2009 Article 7.28 for funeral terms