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Defrosting assistance system and air-conditioning heat pump unit in extremely-cold working conditions as well as defrosting method

A technology of heat pump units and auxiliary systems, applied in heating methods, space heating and ventilation details, refrigerators, etc., can solve problems such as leakage of finned heat exchanger refrigerant, impact of ice cubes, heat transfer freeze damage of units, etc., to achieve The effect of preventing secondary freezing, reducing the quantity, and avoiding the effect of heat exchange

Pending Publication Date: 2019-01-29
BEIJING ZHONGKE HUAYU ENERGY TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the northern winter heating season, when the air source heat pump unit is working in the defrosting mode, the defrosting water is frozen again before it is discharged from the water receiving tray in time. Repeatedly, the ice becomes thicker and thicker until it contacts the fins and affects the replacement of the unit. Refrigerant leakage occurs in hot or even frozen finned heat exchangers

Method used

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  • Defrosting assistance system and air-conditioning heat pump unit in extremely-cold working conditions as well as defrosting method
  • Defrosting assistance system and air-conditioning heat pump unit in extremely-cold working conditions as well as defrosting method
  • Defrosting assistance system and air-conditioning heat pump unit in extremely-cold working conditions as well as defrosting method

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Embodiment Construction

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0036] like Figure 1-4 As shown, an embodiment of the air-conditioning heat pump unit under extremely cold working conditions according to the present invention may include an axial flow fan 1, a fin heat exchanger 2, a windshield 3 and a defrosting auxiliary system 4. In this embodiment, two sets of fin heat exchangers 2 are arranged in a V-shaped structure, the axial fan 1 is horizontally arranged at the upper opening of the V-shaped structure, and two windshields 3 are respectively arranged in the V-shaped structure. openings at bot...

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Abstract

The invention provides a defrosting assistance system of an air-conditioning heat pump unit in extremely-cold working conditions. The defrosting assistance system comprises a water collecting tray anda heating element, wherein the water collecting tray is used for collecting defrosting water when the air-conditioning heat pump unit works in the defrosting mode; and the heating element is used forsupplying heat to the water collecting tray. According to the defrosting assistance system, the effect that defrosting water is timely and thoroughly discharged out of the water collecting tray can be achieved through the reasonable arrangement of the heating element on the water collecting disc. The invention further discloses the air-conditioning heat pump unit and a defrosting method. The air-conditioning heat pump unit is equipped with the defrosting assistance system. The defrosting method is applied to defrosting by using the defrosting assistance system.

Description

technical field [0001] The invention belongs to the technical field of HVAC, and in particular relates to a defrosting auxiliary system under extremely cold working conditions, an air-conditioning heat pump unit including the defrosting auxiliary system, and a defrosting method using the defrosting auxiliary system. Background technique [0002] When the air source heat pump operates under the weather conditions of -10°C to 0°C and relative humidity above 70%, the surface of its outdoor heat exchanger is prone to frost, which will lead to unstable operation or poor reliability of the unit. After the outdoor heat exchanger is frosted, the frost layer will continue to thicken, resulting in an increase in thermal resistance and obstruction of air flow, resulting in a decrease in the heating capacity and the COP of the unit, resulting in a waste of energy. Most of the existing air source heat pumps have a defrosting mode, that is, when the defrosting conditions are met, the heat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B47/00F24F13/22F24F13/30F24F11/42
CPCF24F11/42F24F13/22F24F13/30F25B47/00
Inventor 黄智强王建凯李亿孙吉富丁财丰
Owner BEIJING ZHONGKE HUAYU ENERGY TECH DEV
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