How to increase the maximum outlet water temperature of heat pump water heater

A heat pump water heater and water outlet temperature technology, which is applied in heat pumps, refrigerators, fluid heaters, etc., can solve the problems of increasing the cost of the whole machine and occupying installation space, and achieve the effect of increasing the maximum outlet water temperature

Active Publication Date: 2016-08-10
GREE ELECTRIC APPLIANCES INC
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  • Application Information

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Problems solved by technology

That is to say, when the same amount of hot water needs to be provided, the R410A unit has more hot water, that is, the volume of the water tank is larger. Compared with R134a, heat pump water heater products using R410A refrigerant have no advantages, and the control method needs to be improved

Method used

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  • How to increase the maximum outlet water temperature of heat pump water heater

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Embodiment

[0031] Such as figure 1 As shown, in this embodiment, a water temperature sensor package is arranged in the middle or upper middle of the water tank for detecting the water temperature Ts.

[0032] Taking the circulating unit as an example, the working method of the heat pump water heater is as follows:

[0033] 1. When the water temperature in the water tank is 15°C, set the water temperature to 55°C; the frequency conversion heat pump water heater unit is powered on to turn on the mechanism of hot water, and the frequency is adjusted according to the normal control method.

[0034] 2. The water temperature of the water tank continues to rise. When Ts=45°C, according to the highest water temperature frequency conversion control requirements, the frequency of the frequency conversion hot water unit will not increase, and the current frequency will remain.

[0035] 3. The water temperature of the water tank continues to rise. When Ts=50°C, according to the highest water temper...

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Abstract

The invention provides a method for increasing the highest outlet water temperature of a heat pump water heater. Due to the fact that a compressor frequency reducing step is included, when a heat pump heat water control system judges that current operating parameters conform to compressor frequency reducing conditions, the compressor frequency reduces, and the circulation volume of coolants is reduced. Consequently, the condensing load of the heat pump water heater is reduced, the heat exchange temperature difference of a condenser is reduced, and the temperature of water in a water tank is further increased. According to the method, judgments are conducted according to the current operating parameters, a method of frequency reduction on a high water temperature section is adopted, and the circulation volume of the system is reduced, namely, the condensing load-heat exchange temperature difference of the system is reduced, and the heat exchange temperature difference is reduced by 5 DEG C, so that the highest water temperature can reach 55 DEG C. On the condition that the cost and the installation space of the whole machine are not increased, the purpose that the highest outlet water temperature of a R410A coolant heat pump water heater reaches 55 DEG C is achieved.

Description

technical field [0001] The invention relates to the technical field of control methods for heat pump water heaters, in particular to a method for increasing the maximum water outlet temperature of a heat pump water heater. Background technique [0002] R410A is a new type of environmentally friendly refrigerant. R410A new refrigerant is composed of two quasi-azeotropic mixtures, mainly composed of hydrogen, fluorine and carbon elements (expressed as hfc), and has the characteristics of stability, non-toxicity and superior performance. At the same time, because it does not contain chlorine, it will not react with ozone, nor will it damage the ozone layer. In addition, the performance of air conditioners using new refrigerants will also be improved to a certain extent. R410A is the most suitable refrigerant internationally recognized to replace R22, and it has been popularized in Europe, America, Japan and other countries. [0003] R410A refrigerant is the best and final cho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B30/00F24H4/02F24H9/20
Inventor 曹浩
Owner GREE ELECTRIC APPLIANCES INC
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