Heat pump unit

Abstract

The invention discloses a heat pump unit. The heat pump unit comprises a first heat exchange part, a second heat exchange part, an expansion valve and a water pan, wherein the first heat exchange partserves as a condenser under a heating mode, and the second heat exchange part serves as an evaporator under the heating mode. The heat pump unit further comprises a defroster arranged on the second heat exchange part. The defroster comprises an inlet end and an outlet end. The inlet end of the defroster communicates with an outlet pipe section of the first heat exchange part and an outlet pipe section of the second heat exchange part. The heat pump unit further comprises an ice breaker arranged on the water pan. The ice breaker also comprises an inlet end and an outlet end. The inlet end of the ice breaker also communicates with the outlet pipe section of the first heat exchange part and the outlet pipe section of the second heat exchange part. Under the heating mode, a refrigerating medium flowing out of the first heat exchange part supplies heat to the defroster and the ice breaker, under the refrigerating mode, a refrigerating medium flowing out of the second heat exchange part supplies heat to the defroster and the ice breaker, defrosting and ice breaking are thoroughly conducted on the second heat exchange part and the water pan, and the energy consumption of the heat pump unit is not increased.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to a heat pump unit. Background technique [0002] Because the heat pump unit has the characteristics of low operating cost, energy saving, environmental protection and high energy efficiency during operation, it has been used more and more widely. For example, the heating and cooling air conditioners used in daily life and the air-cooled units used in industrial production are heat pump units. . [0003] During the working process of the heat pump unit, in the heating mode, there is a problem of frosting or even freezing of the evaporator and the problem of freezing of the water tray below the evaporator. [0004] Frosting and icing in the heating mode largely depend on the ambient temperature. When the ambient temperature drops below 10°, the body temperature of the evaporator will usually drop below 0° when the performance of the evaporator is satisfied, making the air The m...

AI Technical Summary

Problems solved by technology

[0007] Therefore, in the prior art, it is easy to continue heating when the evaporator still has a lot of frost and ice.

In this state, the remaining frost layer and ice layer will quickly condense into denser and more difficult to remove frost or ice, so that these frost and ice cannot be removed in the next defrosting mode

In the past, the vicious circle of the heat pump unit has been caused, and the heat pump unit cannot realize the normal heating function in the end.

[0008] Moreover, in the prior art, after the defrosting mode ends, there will be more ice on the water tray.

Once the ice layer on the water tray accumulates to a certain thickness, the ice layer will spread to the bottom of the evaporator, covering both the bottom of the evaporator and the water tray, and eventually the heat pump unit will not be able to achieve normal heating functions, or even It will also cause a series of more serious problems such as pipeline freezing and leakage of refrigerant medium.

[0009] However, if the running time of the defrosting mode is extended until the frost layer, ice layer and ice layer of the water tray on the evaporator are completely cleared and then switched back to the heating mode, it will increase energy consumption and affect the user's heating.

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