Heat pump water heater

A technology of heat pump water heaters and outdoor heat exchangers, which is applied in the field of heat pump water heaters and air source heat pump water heaters, and can solve problems such as high cost, low energy efficiency ratio, and failure to work normally

Inactive Publication Date: 2009-10-14
邓永林
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] In the existing heat pump water heaters, the throttling element of the system adopts capillary tube or electronic expansion valve, and the heat pump water heater using capillary tube as the throttling element cannot automatically adjust the refrigerant flow rate supplied to the outdoor heat exchanger according to the change of outdoor temperature, resulting in energy efficiency. The heat pump water heater using the electronic expansion valve as the throttling element can automatically adjust the refrigerant flow rate supplied to the outdoor heat exchanger according to the outdoor temperature change, but it needs to be equipped with high-precision controllers and sensors. Not only the cost is very expensive, but also the potential failure rate is high

Method used

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  • Heat pump water heater

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Embodiment Construction

[0013] this invention figure 1 In the shown heat pump water heater system, the external balance and external temperature-sensitive bidirectional thermal expansion valve 5 has two liquid connecting pipes at its lower end respectively connected with the indoor heat exchanger 4 and the outdoor heat exchanger 3, and the pressure transfer pipe 5- 2 is connected with the air return pipe 7 to feel the return air pressure flowing through the air return pipe 7, and the temperature sensing tube 5-1 senses the return air temperature flowing through the air return pipe 7 through the connection capillary 5-3.

[0014] The working principle of the heat pump water heater is as follows: the low-pressure gaseous refrigerant is compressed by the compressor 1 into a high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant enters the indoor heat exchanger 4 through the four-way electromagnetic reversing valve 2 to exchange heat with the...

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Abstract

The invention relates to a heat pump water heater, comprising a compressor (1), a four-way electromagnetic reversing valve (2), an outdoor heat exchanger (3), an indoor heat exchanger (4), a water tank (6), and the like. The heat pump water heater is characterized in that a bidirectional heat expansion valve (5) is arranged between the outdoor heat exchanger (3) and the indoor heat exchanger (4), thereby the capability for making hot water and the energy efficiency ratio can be enhanced, and the defrosting time when indoor temperature is below 0 DEG C can be shortened at the same time.

Description

technical field [0001] The invention relates to a heat pump water heater, which belongs to the technical field of vapor compression heat pumps, and is especially suitable for air source heat pump water heaters. Background technique [0002] In the existing heat pump water heaters, the throttling element of the system adopts capillary tube or electronic expansion valve, and the heat pump water heater using capillary tube as the throttling element cannot automatically adjust the refrigerant flow rate supplied to the outdoor heat exchanger according to the change of outdoor temperature, resulting in energy efficiency. The heat pump water heater using the electronic expansion valve as the throttling element can automatically adjust the refrigerant flow rate supplied to the outdoor heat exchanger according to the outdoor temperature change, but it needs to be equipped with high-precision controllers and sensors. Not only the cost is very expensive, but also the potential failure ...

Claims

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Application Information

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IPC IPC(8): F24H4/04
CPCY02B30/12
Inventor 邓永林
Owner 邓永林
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