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Control method of heat pump water heater and control device thereof

A technology for heat pump water heaters and control methods, which is applied to fluid heaters, lighting and heating equipment, etc., can solve the problems of different heating times of heat pump water heaters, and achieve the effects of improving user experience and avoiding time differences

Inactive Publication Date: 2017-06-09
QINGDAO HAIER NEW ENERGY ELECTRIC APPLIANCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to solve the problem of different heating times of heat pump water heaters

Method used

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  • Control method of heat pump water heater and control device thereof
  • Control method of heat pump water heater and control device thereof
  • Control method of heat pump water heater and control device thereof

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Embodiment Construction

[0041] figure 1 It is a schematic diagram of the principle of the heat pump water heater 10 of this embodiment. The air source heat pump water heater 10 is generally composed of a refrigeration cycle, mainly including two parts: an outdoor unit and an indoor heat exchanger. The outdoor unit generally includes an evaporator 300 , a compressor 200 , and an expansion valve 400 , etc.; the indoor heat exchanger generally includes two parts: a condenser 500 and a water tank 600 . Moreover, the compressor 200 adopts a variable frequency compressor, and by adjusting the frequency, the heat pump water heater 10 can operate at different ambient temperatures with the rated heat output Q 0 The heating time is the same, and the thermal efficiency of the heat pump water heater 10 is improved.

[0042] In some preferred embodiments, the condenser 500 can be arranged inside the water tank 600 to exchange heat with water to increase the temperature of the water. This embodiment has a compact...

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Abstract

The invention relates to a control method of a heat pump water heater and a control device thereof. According to the method, firstly, the environment temperature Te of the located environment of an outdoor unit of the heat pump water heater is detected; then, the practical heat generating quantity Q (Te) of the heat pump water heater is calculated according to the environment temperature Te; the rated heat generating quantity Q0 of the heat pump water heater and the rated frequency f0 of a compressor are obtained; then, the operation frequency f of the heat pump water heater is calculated in accordance with the proportion relationship of the practical heat generating quantity Q(Te) and the rated heat generating quantity Q0 according to the rated frequency f0; finally, the compressor of the heat pump water heater is driven to work at the operation frequency f. The heat pump water heater has the advantages that the work frequency of a variable-frequency compressor is regulated, so that the time of the heat pump water heater for reaching the rated heat generating quantity Q0 at different environment temperatures is identical; the condition that the hot water waiting time of a user in different seasons is different is avoided; the efficiency of the heat pump water heater is improved.

Description

technical field [0001] The invention relates to a heat pump water heater, in particular to a control method and a control device for the heat pump water heater. Background technique [0002] At present, heat pump water heaters mostly use air source. The water heater absorbs the low-temperature heat of outdoor air to vaporize the cold medium. After that, the medium is heated and pressurized in the compressor, and finally the heat is transferred to the water through the heat exchanger to realize hot water supply. The ambient temperature of the environment where the heat pump water heater is located is generally -15°C to 45°C, and the tap water temperature (generally 15°C) is heated to the target water temperature (generally about 55°C). As the ambient temperature of the outdoor unit of the heat pump water heater decreases, the evaporation temperature of the system decreases accordingly, and the compression ratio of the compressor increases when the condensing temperature remai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H9/20
Inventor 黄娟
Owner QINGDAO HAIER NEW ENERGY ELECTRIC APPLIANCE
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