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Device and method for icing prevention regulation for heat pump evaporators

A heat pump evaporator, anti-icing technology, applied in lighting and heating equipment, heating/cooling equipment, heating methods, etc., can solve the problems of reducing utilization, reducing heat pump efficiency, etc., to achieve the effect of high thermal energy

Active Publication Date: 2014-12-24
HANON SYST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result is heat dissipation to the surrounding environment, or a reduction in the use of surfaces for absorbing heat, and thus a reduction in the efficiency of the heat pump

Method used

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  • Device and method for icing prevention regulation for heat pump evaporators
  • Device and method for icing prevention regulation for heat pump evaporators
  • Device and method for icing prevention regulation for heat pump evaporators

Examples

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Embodiment Construction

[0064] exist figure 1 The prior art heat pump 100 represented in WO2009 / 094691A1 comprises a refrigeration circuit with a heat pump evaporator 170, a compressor 150, a condenser 140 and an expansion valve 130, the latter being between the outlet of the condenser 140 and the heat pump evaporator Between 170 imports. The connection between the heat pump evaporator 170 and the compressor 150, the condenser 140, the expansion valve 130 and the heat pump evaporator 170 is provided through a refrigerant line 190 for refrigerant flow. The refrigerant liquid absorbs heat from ambient air 180 within the heat pump evaporator 170 and evaporates into a refrigerant vapor. Compressor 150 uses mechanical energy to compress the refrigerant vapor and thereby increase its temperature. In the condenser 140 the refrigerant vapor transfers its heat to the heating circuit 145, causing the refrigerant vapor to condense and become refrigerant liquid again. In the expansion valve 130, the pressure ...

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PUM

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Abstract

The invention relates to a device and a method for icing prevention regulation for a heat pump evaporator (3) in air conditioning systems of vehicles, composed of a subsection (1) of a refrigerant circuit which can be operated both as a heat pump and also as an air-conditioning system. The device comprises the heat pump evaporator (3), an electrical or mechanical refrigerant compressor (4), a cooler fan (9) which is assigned to the heat pump evaporator (3) and which draws ambient air (11) upstream of and through the heat pump evaporator (3) at an adjustable flow speed and which thus permits a permanent flow of ambient air (11) over the heat pump evaporator surface, a first temperature sensor (6) in or on the refrigerant line (5, 5a) upstream of the heat pump evaporator (3) with respect to the heat pump operating direction, and a control and regulating unit (8). The control and regulating unit (8) is connected via signal lines (10, 10a, 10b, 10c, 10e) at least to the first temperature sensor (6), to further sensors, in particular for detecting the ambient air temperature (Tu) and the vehicle speed (VF), to the expansion valve (2), to the cooler fan (9) and to the refrigerant compressor (4) for the direct or indirect regulation of the flow cross section of the expansion valve (2) and the rotational speed of the electric refrigerant compressor (4) or of the regulating valve of the mechanical refrigerant compressor (4) and for the actuation of the cooler fan (9) of the vehicle during heat pump operation.

Description

technical field [0001] The invention relates to an anti-icing control device and method for a heat pump evaporator in a vehicle air conditioner. Background technique [0002] The present invention belongs to the field of heat pumps using ambient air as a heat source. A number of research institutes, vehicle manufacturers and aftermarket suppliers investigate the use of heat pumps that use ambient air as the source of heating for the passenger compartment. When the heat pump is operated with ambient air as the heat source, there is a risk of freezing on the air side of the heat pump evaporator especially when the refrigerant temperature is at or below 0°C. [0003] Evaporator icing is a physical process, which is mainly affected by the following factors: [0004] - evaporator surface temperature; [0005] - the dew point of the air flowing through the evaporator; and [0006] - the flow rate of air directed through the evaporator. [0007] When the humid air cools, or th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60H1/32F24D11/00F25B47/00F25D21/04
CPCF25B47/006B60H1/00785B60H1/00828F24H4/00F24D19/0095B60H2001/00961F25D21/04F25B49/02
Inventor E.施米茨P.海尔M.格拉夫C.雷宾格D.施罗德
Owner HANON SYST
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