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Heat pump water heater control method and heat pump water heater

A technology of a heat pump water heater and a control method, which is applied to fluid heaters, lighting and heating equipment, etc., can solve the problems of low operational reliability, and achieve the effects of good reliability, extended operating life, and high reliability

Active Publication Date: 2021-11-12
QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a suction superheat control method and a heat pump water heater to solve the technical problem of low operating reliability of the existing heat pump water heater in a low temperature environment

Method used

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  • Heat pump water heater control method and heat pump water heater
  • Heat pump water heater control method and heat pump water heater
  • Heat pump water heater control method and heat pump water heater

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Embodiment Construction

[0021] The specific implementation manners of the present application will be described in further detail below in conjunction with the accompanying drawings.

[0022] This application proposes a control method for a heat pump water heater, such as figure 2 As shown, the heat pump water heater constitutes a closed circulation system with a compressor 1, a condenser 2, an electronic expansion valve 3 and an evaporator 4, and a four-way reversing valve 7 for changing the flow direction of the refrigerant for defrosting is arranged in the system; the condenser 2 is a heat exchanger, which can be as figure 2 As shown, the cold water source pipe 10 is connected to the input port of the hot water tank 6 through the water pump 5, and the hot water outlet of the water tank is provided with a hot water pipe 11 and a hot water valve 8; image 3 The shown contact condenser 2 of different materials made of copper or aluminum that is in contact with the outer surface of the hot water ta...

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Abstract

The invention discloses a control method for a heat pump water heater and a heat pump water heater. Based on the exhaust superheat degree, exhaust temperature and ambient temperature, the exhaust superheat degree segment into which the exhaust superheat degree falls and the exhaust gas temperature into which the exhaust gas temperature falls are judged. segment and the ambient temperature segment where the ambient temperature falls, and determine the target suction superheat based on the exhaust superheat segment, exhaust temperature segment, ambient temperature segment and target suction superheat relationship table; based on the target The degree of suction superheat adjusts the opening degree of the electronic expansion valve of the heat pump water heater. The exhaust superheat will quickly reflect changes such as whether the unit is running with liquid before the exhaust temperature has changed significantly. The suction superheat determined based on the exhaust superheat is more accurate, and the unit is based on a more accurate suction superheat. The electronic expansion valve opening control is more accurate, so that the unit can operate in the optimal range for a long time in a low temperature environment, and solves the technical problem of low operating reliability of the existing heat pump water heater unit in a low temperature environment.

Description

technical field [0001] The invention belongs to the technical field of heat pump water heaters, and in particular relates to a heat pump water heater control method and the heat pump water heater. Background technique [0002] Air energy heat pump water heater technology has the characteristics of high efficiency, energy saving, environmental protection and reliability. The existing heat pump water heater products basically borrow the control idea of ​​air conditioner products, and judge and adjust the opening degree of the electronic expansion valve according to the compressor suction temperature and evaporator temperature. However, when faced with low ambient temperature during use, there is a problem of inaccurate control of the refrigerant suction superheat when the unit is severely frosted, which will reduce the operational reliability of the heat pump water heater in a low temperature environment. [0003] At present, the opening steps of the electronic expansion valve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24H9/20F24H4/02
CPCF24H4/02F24H9/2007
Inventor 李博杨磊王慧高文帅贾贾杜顺祥
Owner QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER
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