Heat pump unit control method

A technology of a heat pump unit and a control method, applied in the field of heat pumps, can solve problems such as low heating capacity of hot water, and achieve the effects of increasing heating capacity and strong heat exchange

Inactive Publication Date: 2019-04-23
QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the technical problem of low heating capacity of hot water at low ambient temperature in existing air source heat pump water heaters, the present invention proposes a control method for heat pump units, which can solve the above problems

Method used

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  • Heat pump unit control method

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Embodiment 1

[0062] Embodiment 1, this embodiment proposes a heat pump unit control method, such as figure 1 As shown, the system schematic diagram of the heat pump unit used in this method adopts the double expansion valve control of compressor enthalpy increase, including the main heat exchange loop and the auxiliary air supply loop. The main heat exchange loop and the auxiliary air supply loop pass the first exchange The heat exchanger is used for heat exchange. The main heat exchange circuit is connected with the first heat exchanger, the main throttling device EVX1, and the system heat exchanger. When the refrigerant passes through the system heat exchange circuit, it is used to absorb the heat in the environment. The auxiliary air supply circuit is connected with The auxiliary throttling device EVX2, the first heat exchanger, and the air supply port of the compressor are used to convert the liquid refrigerant from the liquid receiver into a gaseous state during heating, and then supply ...

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Abstract

The invention discloses a heat pump unit control method. The heat pump unit adopted by the method is controlled by a double-expansion valve for increasing enthalpy of a compressor, and comprises a main heat exchange loop and an auxiliary air supply loop, and the main heat exchange loop and the auxiliary air supply loop are subjected to heat exchange through a first heat exchanger; the method comprises the following steps that deviation rate of an air suction superheat degree of the compressor is calculated, and the opening degree of a main throttling device is adjusted according to the deviation rate of the air suction superheat degree; an actual target superheat degree of the first heat exchanger is calculated, the opening degree of an auxiliary throttling device is adjusted according tothe actual target superheat degree of the first heat exchanger. According to the heat pump unit control method, the opening degree of the main throttling device on the main heat exchange loop and theopening degree of the auxiliary throttling device on the auxiliary air supply loop are adjusted, and then the amount of refrigerant entering the heat exchange loop and the air supply loop is adjustedcorrespondingly, so that the unit is enabled to improve the air suction temperature of a press machine of the unit under a low ambient temperature, high heat exchange of the unit at a low ambient temperature is guaranteed, and the heating capacity of the unit is improved.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to a method for controlling a heat pump unit. Background technique [0002] At present, there are two types of heat pump water heaters generally sold in the heat pump water heater market in my country: air source heat pump water heaters and water source heat pump water heaters. Under normal climates, the ambient temperature is much higher than the water temperature, and the power consumed to produce hot water at the same temperature is much lower than that of water source heat pump water heaters. In the northern part of my country, the ambient temperature in the cold winter season is around -15°C, while the water temperature is generally kept above 10°C, and the northern winter generally lasts for 4 months. Heat pump water heaters are much higher. Although in the three seasons of spring, summer and autumn, air source heat pump water heaters can still meet the use requirements in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02
CPCF25B49/02F25B2600/25F25B2700/21F25B2700/2106F25B2700/21152
Inventor 崔怀银杨磊刘晓伟余锦剑
Owner QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER
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