Outdoor double heat exchanger defrosting low-temperature heating system

A technology for outdoor heat exchangers and heating systems, which can be used in fluid heaters, heating and cooling combinations, refrigerators, etc., and can solve problems such as easy damage of heat pump compressors.

Inactive Publication Date: 2010-07-28
曾华文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Effectively improve the coefficient of performance (energy efficiency ratio) and heating (cooling

Method used

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  • Outdoor double heat exchanger defrosting low-temperature heating system
  • Outdoor double heat exchanger defrosting low-temperature heating system
  • Outdoor double heat exchanger defrosting low-temperature heating system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 heat pump air conditioning system one

[0029] Such as figure 1The air conditioning system shown includes a compressor 1, a first four-way reversing valve 2, a second four-way reversing valve 3, a first outdoor heat exchanger 6, a second outdoor heat exchanger 7, and a first throttling device 9. The second throttling device 10, the indoor heat exchanger 11, the first solenoid valve 4 and the second solenoid valve 5, and the exhaust gas from the compressor 1 flow to the first four-way reversing valve 2 and the second four-way reversing valve respectively The D end of the valve 3; one end of the first outdoor heat exchanger 6 and one end of the second outdoor heat exchanger 7 are respectively connected to the common inlet and outlet pipes at both ends of the first throttling device 9 and the third electromagnetic valve 8; the first outdoor heat exchanger The other ends of the device 6 and the second outdoor heat exchanger 7 are respectively connected to the ...

Embodiment 2

[0040] Embodiment 2 heat pump air conditioning system two

[0041] Such as figure 2 In the air conditioning system shown, the exhaust pipe of compressor 1 is connected to the D end of the first four-way valve reversing valve 2, and the gas pipe E at one end of the first four-way valve reversing valve 2 is connected to the indoor heat exchanger 11, and the other One end of the air pipe C is connected to the S end of the second four-way reversing valve 3; the air pipes E and C at both ends of the second four-way reversing valve 3 are respectively connected to the first outdoor heat exchanger 6 and the second outdoor heat exchanger 7; There is a second throttling device 10 and a fourth solenoid valve 12 between the D end of the second four-way reversing valve 3 and the liquid pipe of the indoor heat exchanger 11, and the fourth solenoid valve 12 and the second throttling device 10 are connected in parallel ; When the second throttling device 10 is an electronic expansion valve,...

Embodiment 3

[0052] Embodiment 3 heat pump air conditioning system three

[0053] Such as image 3 In the air conditioning system shown, the exhaust pipe of compressor 1 is connected to the D end of the first four-way valve reversing valve 2, and the gas pipe E at one end of the first four-way valve reversing valve 2 is connected to the indoor heat exchanger 11, and the other The air pipe C at one end is connected to the S end of the second four-way reversing valve 3; the air pipes E and C at the other two ends of the second four-way reversing valve 3 are respectively connected to the first outdoor heat exchanger 6 and the second outdoor heat exchanger 7 There is a fourth electromagnetic valve 12 between the D end of the second four-way reversing valve 3 and the liquid pipe of the indoor heat exchanger 11; the S end of the second four-way reversing valve 3 and any end air pipe E or C pass through The fifth solenoid valve 17 is connected together; one end of the second throttling device 10...

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PUM

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Abstract

The invention relates to an outdoor double heat exchanger defrosting low-temperature heating system, which comprises a compressor (1), four-way reversing valves, an outdoor heat exchanger, a throttling device and an indoor heat exchanger (11). The outdoor heat exchanger is divided into two parts, namely a first outdoor heat exchanger (6) and a second outdoor heat exchanger (7) respectively. One end of the first outdoor heat exchanger (6) and one end of the second outdoor heat exchanger (7) are connected together through the throttling device (9) and an electromagnetic valve (8); and the other ends of the first outdoor heat exchanger (6) and the second outdoor heat exchanger (7) are respectively connected with an air pipe E or C at any one end of two four-way reversing valves; and an inlet/outlet pipe of the throttling device (9) is connected with an inlet/outlet pipe of the electromagnetic valve (8). The outdoor heat exchanger is divided into two parts; the two outdoor heat exchangers alternatively defrost, are used as an evaporator and a condenser in turn, and can still provide heat for the indoor heat exchanger during defrosting. During heating at low temperature, the outdoor heat exchanger B is used as the condenser to heat the inlet air and the inlet air temperature outdoors is raised. Therefore, the coefficient of performance and the heating capacity are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of refrigeration heat energy, and in particular relates to an outdoor double heat exchanger defrosting low-temperature heating system. Background technique [0002] The defrosting and low-temperature heating problems of heat pump units have been plagued by many manufacturers, restricting the promotion and application of heat pump air conditioners, heat pump water heaters and air conditioner water heaters. At present, four-way valve reverse defrosting and hot gas bypass defrosting are generally used. The disadvantages of four-way valve reverse defrosting: it will absorb heat from indoor or hot water, stop heating, affect indoor or hot water temperature, room temperature or The temperature of hot water fluctuates greatly, and the comfort is poor; the high and low pressure fluctuates greatly during defrosting, which has a large impact on the compressor and the four-way valve; most of them rely on the heat gener...

Claims

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Application Information

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IPC IPC(8): F25B13/00F25B47/02F25B41/04F25B41/06F24H4/02F25B29/00
Inventor 曾华文
Owner 曾华文
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