QB/T 1520-2023Household and similar electrical dishwasher (English PDF)

3.1 Electrical dishwasher

An appliance driven by electrical energy that relies on chemical, mechanical, thermal energy to wash, rinse, dry tableware.

3.2 Rated capacity

ps

According to the requirements of Appendix B of GB 38383-2019, the number of standard tableware sets that a dishwasher can handle at one time, which shall be specified by the appliance instructions or the manufacturer.

3.3 Standard washing program

Except for special requirements of the test, the main program used for the performance test of this document, which shall be specified by the appliance instructions or the manufacturer.

5.1 Environmental conditions for use

Unless otherwise specified in the instructions for use of the appliance, the following environmental conditions for use shall be met.

5.2 General requirements

Unless otherwise specified, the dishwasher shall be powered by a single-phase AC power supply, which has a voltage of 220 V ~ 250 V and a frequency of 50 Hz ~ 60 Hz.

Before the cleaning performance test, the prototype shall be loaded with special consumables such as rinsing agent and salt in accordance with the instructions for use of the appliance or the method specified by the manufacturer; it shall be fully loaded with clean loads and tested for at least 3 complete standard washing programs.

5.3 Safety

The safety of the dishwasher shall comply with the requirements of GB 4706.1 and GB 4706.25.

5.4 Cleaning performance

The dishwasher shall be tested with a standard washing program; the cleaning index PC shall not be less than 1.12.

5.5 Drying performance

The dishwasher shall be tested with a standard washing program; the drying index PD shall not be less than 0.86.

5.6 Energy efficiency index

The dishwasher shall be tested with a standard washing program; the energy efficiency index EEI shall not be greater than 71.

5.7 Water efficiency index

The dishwasher is tested with a standard washing program; the water efficiency index

WEI shall not be greater than 68.

5.12 Machine durability

The dishwasher shall be able to operate normally for no less than 1960 times, taking one complete "standard washing program" as one time.

5.13 Rinsing performance

The rinsing rate of the dishwasher shall not be less than 92%.

5.14 Material dissolution

The dissolution limit of parts and materials in contact with food shall comply with the requirements of the corresponding parts of GB 4806.

5.15 Clean & dry-keeping performance

For dishwashers with clean & dry-keeping function clearly stated in the instructions for use of the appliance, the operation time of the clean & dry-keeping function shall not be less than 72 hours; the clean & dry-keeping score shall not be less than 3 points.

The level of clean & dry-keeping performance of the dishwasher shall be evaluated according to Table 2.

5.16 Allowable deviation of stated value

The deviation -- BETWEEN the measured values of the cleaning index, drying index, energy efficiency index, water efficiency index of the dishwasher AND the values stated on the appliance body or in the instructions for use of the appliance (or the specified values of the grades indicated in Appendix B) -- shall not exceed the deviation shown in Table 3.

5.17 General structure

5.17.1 Fasteners and other parts in the dishwasher shall comply with the relevant national standards, industry standards or public enterprise standards; their wearing parts shall be easy to replace.

5.17.2 The inner wall of the dishwasher tank and the surface of the parts in contact with the washing shall be smooth; it shall not scratch or damage the tableware during normal use.

5.18 Materials

5.18.1 Metal parts

The surface of the metal parts of the dishwasher (except stainless steel) shall be treated with anti-corrosion, such as electroplating, painting, enamel or other effective anti- corrosion treatment.

5.18.2 Electroplated parts

5.18.3 Painted or plastic-coated parts

5.18.4 Plastic parts

The surface of plastic parts of dishwashers shall be flat, smooth, uniform in color, resistant to aging; it shall not have defects such as cracks, bubbles, shrinkage holes, etc.

6.1 Test conditions

6.1.1 Test power supply

During the test, the power supply voltage shall be kept within (1 ± 1%) of the rated voltage. Unless otherwise specified in the test, the test voltage is 220 (1 ± 1%) V.

During the test, the power supply frequency shall be kept within (1 ± 1%) of the rated frequency. Unless otherwise specified in the test, the test frequency is 50 (1 ± 1%) Hz.

The waveform distortion of the power supply voltage in the standby/shutdown energy consumption test shall not be greater than 2%; the ratio of peak value to effective value shall be within 1.34 ~ 1.49.

6.1.2 Test water

During the entire test and pollutant preparation and treatment process, the hardness of the test water shall be (2.5 ± 0.5) mmol/L. The water hardness shall be adjusted in accordance with the requirements of GB/T 23119.

Water temperature. (15 ± 2) °C.

6.1.6 Test load and loading method

Except for special provisions, the test shall be conducted in accordance with the test load and corresponding number of sets specified in Appendix B of GB 38383-2019.

The reference dishwasher is loaded in accordance with the relevant requirements of GB

38383-2019.The prototype is loaded in accordance with the instructions for use of the appliance or the relevant requirements of the manufacturer.

6.2 Test instruments

The performance, range, uncertainty and other parameters of the test instruments shall meet the following requirements.

6.3 General requirements

6.3.1 Each prototype shall be tested for at least 5 valid cleaning performance tests. The test results of the cleaning performance and drying performance tests are the arithmetic mean of all valid test results.

6.4 Cleaning performance

The preparation and contamination method of pollutants in the cleaning performance test shall be carried out in accordance with Appendix A of GB 38383-2019; the loading method of tableware in the oven shall be carried out in accordance with Appendix E of

GB 38383-2019;

6.5 Drying performance

The drying performance test is carried out at the same time as the cleaning performance test; the evaluation and calculation of the test results are carried out in accordance with

7.4 of GB/T 20290-2016.

6.6 Cyclic power consumption and cyclic water consumption

The cyclic power consumption and cyclic water consumption tests shall be carried out at the same time as the 6.4 cleaning performance test; the cyclic water consumption and cyclic power consumption shall be recorded during the cleaning performance test.

The amount of water and electricity generated by the regeneration process of the soft water system.

6.7 Standby power

The test is carried out according to the following method.

6.15 Material dissolution

For parts and materials in contact with food, the dissolution limit is tested in accordance with the relevant methods of the corresponding parts of GB 4806.

6.18 General structure and materials

6.18.1 Structural and material inspection

Visually inspect the structure and materials of the dishwasher and conduct relevant tests if necessary.

6.18.2 Corrosion resistance test of chassis coating layer

As shown in Figure 1, cut a chassis sample which has a length of 200 mm and a width of 50 mm. In the middle of one side of the outer surface, use a new razor blade to cut two parallel cuts which have a length of 150 mm, a spacing of 17 mm, and a depth to the substrate. Then place it in a salt spray test chamber and spray it with a sodium chloride (NaCl) solution at a mass fraction of (5 ± 1)% in an environment of (35 ± 2) °C for 24 hours. After taking it out, wash it thoroughly with water to clean the surface attachments; then measure the rust width at the cut.

7.1 Basic requirements

Dishwashers shall be tested according to this document and can only be put into mass production after passing the formal inspection.

7.2 Inspection instructions

Each dishwasher shall be inspected and qualified by the technical inspection department of the manufacturer before leaving the factory. It shall be accompanied by a quality inspection certificate, appliance instructions, and warranty.

7.3 Inspection classification

The inspection of dishwashers is divided into exit-factory inspection and type inspection.

7.4 Exit-factory inspection

7.4.1 Mandatory inspection items for product exit-factory inspection

The mandatory inspection items for product exit-factory inspection are as shown in item

1 and 3 of Table 4.

7.4.2 Random inspection items for product exit-factory inspection

7.5 Type inspection

7.5.1 Dishwashers shall be inspected at least once a year during normal production.

Type inspection shall also be conducted in any of the following situations.

7.5.2 Type inspection shall include all inspection items specified in this document and

GB 4706.25.

7.5.3 The sampling plan used for type inspection shall be in accordance with the discrimination level I, sampling scheme, sample size of GB/T 2829.The rejection quality level shall meet the requirements of Table 5.Safety requirements are all fatal defects. If one item is unqualified, the batch of products is unqualified.

7.5.4 The cycle of type inspection shall be determined by the manufacturer and shall comply with the provisions of 7.5.The samples for type inspection shall be randomly selected from the products that have passed the exit-factory inspection.

7.5.5 If the type inspection is qualified, the batches of the representative group of products produced in this cycle that have passed the acceptance inspection can be put into storage or exit-factory as qualified products. If they are put into storage for more than two years before being shipped, they shall be subject to type inspection again.

7.5.6 Before the end of this type inspection, the supplier's quality inspection department

or the buyer may refer to the last type inspection results to accept the product; however, the current type inspection results shall prevail.

8.1 Marking

8.1.1 The markings on the dishwasher and packaging shall comply with the requirements of the corresponding clauses of GB/T 5296.2.

8.1.2 The values that can be achieved by the dishwasher cleaning index, drying index, energy efficiency index, water efficiency index and other indicators shall be marked on the nameplate or the appliance instructions;

8.1.3 The following information shall be marked on the product.

8.2 Packaging

The packaging of the dishwasher shall be designed in accordance with the moisture- proof packaging and shock-proof packaging required by GB/T 1019.The packaging materials and packaging marks shall comply with the relevant requirements of GB/T 1019.

8.3 Transportation and storage

8.3.1 During transportation, the dishwasher shall be protected from severe collisions, falls, rain, snow, chemical corrosion.

8.3.2 The dishwasher shall be stored in a clean and well-ventilated environment at an ambient temperature of no more than 40 °C and a relative humidity of no more than 85% without opening the packaging. There shall be no corrosive gases in the surrounding air.

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