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Control method of heat pump type dishwasher and heat pump type 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: 2019-03-05
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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  • Control method of heat pump type dishwasher and heat pump type dishwasher
  • Control method of heat pump type dishwasher and heat pump type dishwasher

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 with figure 2 As shown, this embodiment discloses a control method for a heat pump dishwasher. The control method in this embodiment includes that when the heat pump dishwasher starts to heat the washing water, controlling the heat pump working fluid loop to start before the washing water starts to circulate in the heat exchange device.

[0039] Such as figure 2 As shown, the heat pump system of this embodiment includes a heat pump working fluid circuit that is 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 fluid. Specifically, the high-pressure heat pump working fluid steam discharged from the compressor 7 flows into the condenser 9, and the heat pump working fluid steam condenses to release latent heat. The liquid heat pump working fluid flows through t...

Embodiment 2

[0048] This embodiment is a supplement to embodiment 1, such as figure 2 As shown, in this embodiment, the evaporator 6 is further 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 heat pump heating efficiency at the initial start of the heat pump dishwasher, in addition to the above control process, in this embodiment, the starting time of the fan 5 is further controlled to be earlier than the starting time of the compressor 7. Controlling the fan 5 to start first will increase the heat exchange 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

[0050] This embodiment is a comprehensive implementation of the control method of the heat pump dishwasher of the first and second embodiments.

[0051] In this embodiment, as figure 2 As shown, the heat pump working fluid circuit is provided with a compressor 7, a condenser 9, a throttling device 8, and an evaporator 6, which are connected to each other to form the heat pump working fluid circuit, and the evaporator 6 is also provided with a fan 5 ; The washing water circuit is provided with a circulating water pump 4.

[0052] Such as figure 1 As shown, the washing water heating of the dishwasher includes the following steps in sequence:

[0053] S1. Turn on the fan of the evaporator;

[0054] S2. Turn on the compressor of the heat pump working fluid loop;

[0055] S3. After a time interval of t seconds, turn on the circulating water pump of the washing water channel.

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Abstract

The invention discloses a control method of a heat pump type dishwasher and the heat pump type dishwasher. The dishwasher adopts a heat pump for heating washing water and includes a heat pump work medium loop and a washing water path, the heat pump work medium loop includes a heat exchange device, and the heat pump work medium loop and the washing water path exchange heat through the heat exchangedevice to heat the washing water; the control method comprises the step that when the heat pump type dishwasher starts to heat the washing water, the heat pump work medium loop is controlled to be started before the washing water is circulated in the heat exchange device. By optimizing a starting process of the heat pump type dishwasher, the pressure drop of a condenser and evaporator of a heat pump system cannot be too large, the circulation quantity of a heat pump work medium of the heat pump system maintains a normal flow rate, and thus rapid increase of a heat pump load is facilitated; moreover, lubricating oil discharged with the heat pump work medium when a compressor is started can be recycled back to the compressor for supplement in time, a good lubrication effect is achieved on the compressor, and the service life of the compressor is prolonged.

Description

Technical field [0001] The invention belongs to the field of kitchen equipment, and specifically relates to a heat pump type dishwasher control method and a heat pump type dishwasher. Background technique [0002] Dishwashers are equipment used to automatically clean bowls, chopsticks, plates, dishes, knives, forks and other tableware. 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 hygiene for cooking personnel in restaurants, hotels, and institutional canteens. Now, a variety of small dishwashers are already on the market and are gradually entering ordinary households. [0003] Existing dishwashers use heating pipes for dishwashers. The heating pipes are built into the sink at the bottom of the inner tank. During washing, the heating pipes are used for heating, while the circulating water pump circulates water to wash the dishes. However, this meth...

Claims

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Application Information

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Patent Type & Authority Applications(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