Air-conditioning heat pump device

Abstract

The invention discloses an air-conditioning heat pump device, which comprises a compressing mechanism, a heat-source side heat exchanger, a user side heat exchanger, a second heat exchanger, a second throttling mechanism, a four-way valve, a first flow-direction control valve, a second flow-direction control valve, a ninth flow-direction control valve, a first one-way valve, a second one-way valve, a third one-way valve, a fourth-one-way valve, an economizer, a third throttling mechanism, a fifty one-way valve, a sixth one-way valve, a seventh one-way valve and an eighth one-way valve. When in operation, free switching of single-double stage compression can be realized according to requirements; the air-conditioning heat pump device can work normally under high-low temperature working environment to realize a plurality of operation states, such as producing domestic hot water, refrigerating or heating, and the like. The invention has the advantages of simple structure, reliable operation, and low cost, and is particularly suitable for domestic small-medium size air-conditioning heat pump devices with domestic hot water requirements.

Description

technical field [0001] The invention relates to an air-conditioning heat pump device, which belongs to the technical field of air-conditioning and refrigeration. Background technique [0002] The invention patent with the application number 200710305376.3 relates to a dual-purpose heat pump device for winter and summer. During the operation of the device throughout the year, it can realize cooling, heating, production of domestic hot water, and recovery of condensation heat during cooling. It needs multiple functions such as cooling and production of domestic hot water at the same time, heating and production of domestic hot water at the same time according to user needs in winter; but the above-mentioned device has the following defects during operation: [0003] 1) When the condensing temperature is too high or the evaporation temperature is too low, the throttling loss of the throttling mechanism will increase, resulting in an increase in the gas content in the gas-liquid...

AI Technical Summary

Problems solved by technology

[0003] 1) When the condensing temperature is too high or the evaporation temperature is too low, the throttling loss of the throttling mechanism will increase, resulting in an increase in the gas content in the gas-liquid two-phase mixture after throttling, so that the heat exchange capacity of the evaporator cannot be fully utilized , so as to reduce the efficiency of the heat pump device, on the other hand, it will cause the exhaust temperature of the compressor to be too high, and in severe cases, it will affect the normal operation of the compressor;

[0004] 2) When realizing the function of simultaneously cooling and producing domestic hot water according to the user's needs in summer, the above-mentioned device needs to control the heat supply and cooling capacity at the same time according to the user's requirements, or simultaneously control the temperature of the cooled medium (such as : indoor air temperature or chilled water temperature) and the temperature of the heated medium (for example: domestic hot water temperature), therefore, when the above device adopts single-stage compression, due to the mutual influence between the heat supply and cooling capacity, at the same time The control of the heat supply and cooling capacity, or the temperature of the cooled medium and the temperature of the heated medium cannot be very precise;

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