Heat pump system provided with water pan de-icing pipeline

Abstract

The invention provides a heat pump system provided with a water pan die-icing pipeline. The system is characterized in that a preheating system is additionally arranged on the bottom surface of a water pan of a fin type evaporator, wherein the preheating system comprises a working medium pipeline; one end port of the working medium pipeline is connected to a gate J of an indoor heat exchanger, andthe other end port of the working medium pipeline is connected to an outlet of a first one-way valve; the working medium pipeline is an one-way pipeline is connected to a fourth one-way valve; the outlet end of the one-way valve is connected to the outlet of the first one-way valve. According to the heat pump system provided with the water pan di-icing pipeline, the preheating system is additionally arranged on the bottom surface of the water pan, so that the temperature of the water pan can be increased, and the defogging efficiency is improved, and as a result, the water pan is prevented from being iced and blocked; a hot working medium pipe is de-iced, so that the temperature of the evaporator can be decreased, and the heat absorbing capacity of the fin type evaporator can be improved,and as a result, the air absorbing heating performance of a heater in a low-temperature environment can be improved; the water pan can be prevented from being iced and blocked, and meanwhile, the heating performance of the heater in the low-temperature environment can be improved.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to a heat pump system with a water tray for melting ice. Background technique [0002] In northern heating, in low-temperature environment, the finned heat exchanger of the unit is frequently frosted and defrosted, and the outdoor temperature is low. After defrosting, the water will freeze quickly in the water receiving tray, blocking the drain, and affecting the defrosting effect. The suction pressure of the compressor is low, the low pressure protection unit shuts down, and the heating capacity drops. When the existing heat pump unit is in heating operation, when the outdoor ambient temperature is close to or lower than the freezing point, the water vapor in the air will frost on the surface of the evaporator. The frosting of the evaporator increases the heat transfer resistance of the evaporator, increases the air flow resistance, and reduces the heat transfer efficiency. If...

AI Technical Summary

Problems solved by technology

If this situation is not improved, it will continue to deteriorate, which will lead to a significant attenuation of the heating capacity of the unit, an imbalance between the supply and demand of room heat, and the room temperature will begin to fluctuate.

The existing defrosting methods of heat pump systems mostly use additional antifreeze circulation pipelines, which will increase the complexity of the unit, make maintenance inconvenient, and increase costs

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