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Heat-pump water heater and control method thereof

A technology for heat pump water heaters and control methods, applied in temperature control, fluid heaters, non-electric variable control, etc., capable of solving problems such as performance degradation of heat pump water heaters

Active Publication Date: 2014-10-29
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a heat pump water heater and its control method, so as to solve the problem in the prior art that the performance of the heat pump water heater decreases as the water temperature rises

Method used

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  • Heat-pump water heater and control method thereof
  • Heat-pump water heater and control method thereof
  • Heat-pump water heater and control method thereof

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Embodiment Construction

[0027] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

[0028] The embodiment of the present invention provides a heat pump water heater. The heat pump water heater provided by the embodiment of the present invention will be specifically introduced as follows:

[0029] The heat pump water heater provided by the embodiment of the present invention mainly includes a water tank, a detection unit, a compressor, and a control unit. The detection unit is used to detect the temperature of the water in the water tank. It can be a thermocouple or a thermal resistance type temperature sensor, or it can be Temperature sensor package. The motor coil of the compressor has multi-stage windings. The resistance of the n-th winding of the multi-stage winding is ...

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Abstract

The invention discloses a heat-pump water heater and a control method thereof. The heat-pump water heater comprises a water tank, a detection unit, a compressor and a control unit, wherein the detection unit is used for detecting the water temperature in the water tank to obtain detected water temperature; a motor coil of the compressor is provided with multistage windings, the resistance value of the nth winding of the multistage windings is less than that of the (n-1)th winding of the multistage windings, and n is a natural number larger than 2; the control unit is connected with the detection unit and the compressor and used for searching for windings corresponding to the detected water temperature to obtain the pth winding and controlling the compressor to adopt the pth winding for operation. According to the heat-pump water heater and the control method, the problem that the performance of a heat-pump water heater declines as the water temperature rises in the prior art is solved, and therefore the overall performance of the heat-pump water heater is improved.

Description

Technical field [0001] The invention relates to the field of water heaters, in particular to a heat pump water heater and a control method thereof. Background technique [0002] The overall unit performance of the heat pump water heater will decrease with the increase of the hot water temperature, that is, the higher the water temperature, the lower the performance of the heat pump water heater. Especially for heat pump water heater products that use fixed-frequency compressors, because the fixed-frequency compressor has a fixed number of motor turns, fixed windings, and fixed speed, it is impossible to adjust the compressor frequency or speed according to the operating conditions of the system under different water temperature conditions. The performance of the stage heat pump water heater will be significantly reduced, resulting in a decrease in the overall performance of the heat pump water heater during the entire heating process. [0003] Regarding the problem that the perfor...

Claims

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Application Information

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IPC IPC(8): F24H9/20G05D23/20
CPCF24H4/04F24H15/223F24H15/156F24H15/421F24H15/38F24H9/2014
Inventor 寇颖举李绍斌曹浩史帆柳飞袁明征
Owner GREE ELECTRIC APPLIANCES INC
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