Air source heat pump system capable of intermittently supplying heat under defrosting operating condition
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An air source heat pump and working condition technology, which is applied in heat pumps, compressors with reversible cycles, lighting and heating equipment, etc. The effect of impacting each other and improving the defrosting effect
Inactive Publication Date: 2009-05-20
HARBIN INST OF TECH
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[0003] In order to solve the existing defrosting method in the defrosting process, the suction pressure changes sharply, the heat supply is stopped, and the problem of blowing cold air to the room is solved. air source heat pump system
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specific Embodiment approach 1
[0007] Specific Embodiment 1: As shown in Figure 1, the air source heat pump system described in this embodiment that can supply heat intermittently under defrosting conditions includes a compressor 1, a four-way reversing valve 2, an indoor unit 3, a throttling Mechanism 4, outdoor unit 5 and gas-liquid separator 6, the air source heat pump system also includes a first solenoid valve F1, a second solenoid valve F2, a third solenoid valve F3, a seventh solenoid valve F7, an eighth solenoid valve F8, The ninth solenoid valve F9, the defrosting branch assembly and the step-down branch assembly; the defrosting branch assembly consists of the tenth solenoid valve F10, the eleventh solenoid valve F11, the twelfth solenoid valve F12, the defrosting branch Road 7, the first defrosting branch road 7-1, the second defrosting branch road 7-2 and the third defrosting branch road 7-3, the step-down branch circuit assembly is composed of the fourth solenoid valve F4, the fifth solenoid valv...
specific Embodiment approach 2
[0009] Embodiment 2: As shown in FIG. 1 , the air source heat pump system in this embodiment further includes a dryer 9 , and the dryer 9 is arranged on the pipeline between the indoor unit 3 and the throttling mechanism 4 . The drier 9 can remove substances such as moisture in the refrigerant. Other components and connections are the same as those in the first embodiment.
[0010] working principle:
[0011] When the present invention is in the heating state, the fourth solenoid valve F4, the fifth solenoid valve F5, the sixth solenoid valve F6, the tenth solenoid valve F10, the eleventh solenoid valve F11 and the twelfth solenoid valve F12 are all kept closed, and the The first solenoid valve F1, the second solenoid valve F2, the third solenoid valve F3, the seventh solenoid valve F7, the eighth solenoid valve F8 and the ninth solenoid valve F9 are kept open. The high-temperature (high-pressure) gas refrigerant discharged from the compressor 1 is turned into a low-temperat...
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Abstract
The invention discloses an air source heat pump system which can unintermittently supply heat under the working condition of defrosting and relates to an air source heat pump system. The system solves the problems that the prior defrosting mode has drastic change of air suction pressure, stops heat supply and blows cold wind indoors in the defrosting process. The outlet end of a compressor is communicated with a first port of a four-way reversing valve; a second port of the four-way reversing valve is communicated with the inlet end of an indoor machine; the outlet end of the indoor machine is respectively communicated with one end of a first bypass shunt circuit, one end of a second bypass shunt circuit and one end of a third bypass shunt circuit through a throttling mechanism; the other end of the first bypass shunt circuit, the other end of the second bypass shunt circuit and the other end of the third bypass shunt circuit are communicated with a third port of the four-way reversing valve; a fourth port is communicated with the inlet end of a gas-liquid separator; and the outlet end of the gas-liquid separator is communicated with the inlet end of the compressor. The system realizes unintermittent heat supply in the defrosting process, simultaneously reduces drastic change of air suction pressure of the compressor and is more stable in the conversion process of heat supply and defrosting.
Description
technical field [0001] The invention relates to an air source heat pump system. Background technique [0002] As an energy-saving and environment-friendly heating method, air source heat pump has received more and more attention. However, during operation, there is frost on the outdoor unit of the unit. The existence of the frost layer seriously affects the heating performance of the unit. Therefore, it is necessary to remove the frost layer in time. How to achieve timely and effective defrosting has become an urgent research problem. There are many existing defrosting methods, but they all have different degrees of problems. In summary, there are mainly the following problems: 1. Natural defrosting method, the compressor needs to be interrupted during defrosting, and the outdoor air temperature is required to be higher than 2-3 °C Only when it can run, the limitation is big. 2. The electric heating defrosting method consumes high-quality electric energy, the energy uti...
Claims
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