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Heat pump dishwasher control method and heat pump dishwasher

A control method and technology for dishwashers, which are applied to the washing machine/washing machine for tableware, parts of the washing machine/rinsing washing machine for tableware, washing control program, etc. Small, low compressor suction pressure, etc., to achieve the effect of being conducive to rapid rise, prolonging life, and reducing condensing pressure

Active Publication Date: 2021-07-23
QINGDAO HAIER DISHWASHER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the initial operation of the compressor, the suction pressure of the compressor is too low, and the circulation volume of the heat pump working medium is too small, which is not conducive to the rapid increase of the heat pump load
Moreover, the suction pressure of the compressor is too low, and the lubricating oil discharged with the heat pump working fluid cannot be circulated back to the compressor in time for replenishment when the compressor is turned on, resulting in poor lubrication of the compressor and affecting the life of the compressor

Method used

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  • Heat pump dishwasher control method and heat pump dishwasher
  • Heat pump dishwasher control method and heat pump dishwasher

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 and figure 2 As shown, this embodiment discloses a heat pump dishwasher control method. The control method described in this embodiment includes that when the heat pump dishwasher starts to heat the washing water, the heat pump working fluid circuit is controlled to start before the washing water starts to circulate in the heat exchange device.

[0037] Such as figure 2As shown, the heat pump system of this embodiment includes a heat pump working fluid circuit connected to each other: a throttling device 8 , an evaporator 6 , a compressor 7 , and a condenser 9 . The working principle of the heat pump system is to realize energy transfer through the conversion of the gas-liquid state of the heat pump working medium. Specifically, the high-pressure heat pump working medium steam discharged from the compressor 7 flows into the condenser 9, and the heat pump working medium steam condenses to release latent heat. The liquid heat pump working fluid flows...

Embodiment 2

[0046] This embodiment is a supplement to embodiment 1, such as figure 2 As shown, in this embodiment, the evaporator 6 is also provided with a fan 5, and the fan 5 is used to accelerate the heat exchange between the evaporator and the outside. Also in order to improve the heating efficiency of the heat pump at the initial stage of start-up of the heat pump dishwasher, in addition to adopting the above-mentioned control process in this embodiment, the start-up time of the fan 5 is further controlled to be earlier than the start-up time of the compressor 7 . Controlling the fan 5 to start first will increase the heat transfer capacity of the evaporator 6 and increase the evaporation temperature when the heat pump system is running, which is more conducive to the rapid increase of the load of the compressor 7 .

Embodiment 3

[0048] This embodiment is the implementation steps of the method for controlling the heat pump dishwasher in combination of Embodiment 1 and Embodiment 2.

[0049] In this example, if figure 2 As shown, the heat pump working medium circuit is provided with a compressor 7, a condenser 9, a throttling device 8 and an evaporator 6 that are interconnected to form the heat pump working medium circuit, and the evaporator 6 is also provided with a fan 5 ; The water circulation pump 4 is arranged on the washing water waterway.

[0050] Such as figure 1 As shown, the washing water heating of the dishwasher includes the following steps in sequence:

[0051] S1, turn on the fan of the evaporator;

[0052] S2. Turn on the compressor of the heat pump working fluid circuit;

[0053] S3. After a time interval of t seconds, turn on the circulating water pump of the washing water channel.

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PUM

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Abstract

The invention discloses a control method for a heat pump type dishwasher and a heat pump type dishwasher. The dishwasher uses a heat pump to heat washing water, and includes a heat pump working fluid circuit and a washing water circuit, and the heat pump working fluid circuit includes a heat exchange device, the heat pump working fluid circuit and the washing water water circuit exchange heat through the heat exchange device to heat the washing water; the control method includes: when the heat pump dishwasher starts to heat the washing water, controlling the heat pump working fluid circuit when the washing water begins to exchange heat The device starts before cycling. By optimizing the start-up process of the heat pump type dishwasher, the invention makes the pressure drop of the condenser and the evaporator of the heat pump system not too large, and keeps the circulating volume of the heat pump working medium of the heat pump system at a normal flow rate, thereby facilitating the rapid increase of the heat pump load. When the compressor is turned on, the lubricating oil discharged with the working fluid of the heat pump can be circulated back to the compressor for replenishment in time, providing good lubrication for the compressor and prolonging the life of the compressor.

Description

technical field [0001] The invention belongs to the field of kitchen equipment, and in particular relates to a heat pump dishwasher control method and the heat pump dishwasher. Background technique [0002] Dishwashers are equipment used to automatically clean tableware such as bowls, chopsticks, plates, plates, knives, forks, etc. According to the structure, they can be divided into two categories: box type and conveyor type. It reduces labor intensity, improves work efficiency, and improves cleanliness and sanitation for the cooks in restaurants, hotels, and canteens of government agencies. Now, a variety of small dishwashers are on the market and are gradually entering ordinary families. [0003] Existing dishwashers all use heating tubes for the dishwasher. The heating tubes are built into the water tank at the bottom of the liner. When washing, the heating tubes are used for heating, and the circulating water pump is used to circulate water to wash the tableware. But ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A47L15/16A47L15/42A47L15/48
CPCA47L15/0018A47L15/16A47L15/42A47L15/4285A47L15/48Y02B40/00
Inventor 宋华诚许升
Owner QINGDAO HAIER DISHWASHER