Carbon dioxide heat pump evaporator

Abstract

The invention discloses a carbon dioxide heat pump evaporator. The carbon dioxide heat pump evaporator comprises a fixing base, side evaporator bodies, an evaporator tray and a defrosting drainage system, wherein the side evaporator bodies are arranged on the left side and the right side of the fixing base separately and are provided with defrosting water circulation channels, and the evaporator tray is arranged at the bottoms of the side evaporator bodies and is used for supporting the side evaporator bodies; the defrosting drainage system comprises a plurality of defrosting electric heatingpipes, water receiving tanks, water tank electric heating mechanisms and drainage pipes, wherein the defrosting electric heating pipes are arranged in the side evaporator bodies in an inserted mode, the water receiving tanks communicate with the defrosting water circulation channels, the water tank electric heating mechanisms are used for heating the water receiving tanks, and the drainage pipes communicate with the water receiving tanks and are provided with pipeline electric heating tracing bands; and the evaporator tray, the water receiving tanks and the drainage pipes are sequentially arranged from top to bottom. The carbon dioxide heat pump evaporator is suitable for low-temperature areas, particularly for severe cold areas, and has the characteristics of being short in defrosting time, smooth in drainage and the like.

Description

technical field [0001] The invention relates to a heat pump evaporator, in particular to a carbon dioxide heat pump evaporator. Background technique [0002] Due to the characteristics of the refrigerant itself, the air source carbon dioxide heat pump has the characteristics of environmental protection, low temperature resistance, and high temperature water outlet, and has attracted more and more attention from the market. Air-source carbon dioxide heat pumps have a one-time output temperature of up to 90°C, and can normally produce high-temperature hot water at -30°C cold temperatures. Compared with conventional air-source heat pumps, they have incomparable advantages; but when the environment When the temperature is low, when the surface temperature of the fin heat exchanger is lower than 0°C, frost is easy to form on the surface. As the frost layer continues to thicken, the heat transfer resistance increases, resulting in a decrease in the heat transfer performance of the...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an improved carbon dioxide heat pump evaporator, which can solve the problems of long defrosting time and poor drainage in the existing carbon dioxide heat pump system when operating at low ambient temperature. Inadequacies

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