Control method and device for electronic expansion valve at indoor unit evaporator inlet

A technology of electronic expansion valve and control method, which is applied in the direction of noise suppression, refrigeration and liquefaction, refrigerators, etc., which can solve the problems of low compressor operating frequency, large condenser flow area, and affecting user experience, etc., to achieve the goal of promoting refrigerant flow rate , Enhance heat exchange efficiency, increase the effect of refrigerant flow uniformity

Inactive Publication Date: 2019-06-18
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, due to the low operating frequency of the compressor driving the refrigerant flow and the large flow area of ​​the condenser, the refrigerant flow rate is slow and the mixing is uneven
[0004] Therefore, in the multi-connected system of the related art, when the refrigerant passes through the flow section of the electronic expansion valve, the bubbles in the two-phase refrigerant with a relatively slow flow rate will collide or rub against the inner wall of the flow channel in the electronic expansion valve flow channel, thereby generating flow Noise, affecting user experience

Method used

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  • Control method and device for electronic expansion valve at indoor unit evaporator inlet
  • Control method and device for electronic expansion valve at indoor unit evaporator inlet
  • Control method and device for electronic expansion valve at indoor unit evaporator inlet

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Embodiment Construction

[0028] 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 and are intended to explain the present invention and should not be construed as limiting the present invention.

[0029] The method and device for controlling the electronic expansion valve at the inlet of the evaporator of the indoor unit according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0030] figure 1 It is a schematic flowchart of a method for controlling the electronic expansion valve at the inlet of the evaporator of the indoor unit according to an embodiment of the present invention.

[0031] Such as figure 1 As shown, the control method of the electronic expa...

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Abstract

The invention provides a control method and device for an electronic expansion valve at an indoor unit evaporator inlet. The method comprises the steps that the system capability requirement and the system indoor unit starting capacity are acquired; the electronic expansion valve at the indoor unit evaporator inlet is controlled according to the system capability requirement; or the electronic expansion valve at the indoor unit evaporator inlet is controlled according to the system indoor unit starting capacity. According to the control method and device for the electronic expansion valve at the indoor unit evaporator inlet, the condensation pressure of a condenser is increased and the heat exchange efficiency of the condenser is enhanced by controlling the electronic expansion valve at the indoor unit evaporator inlet, therefore, the supercooling degree of an outlet of the condenser is improved, the refrigerant flowing speed is promoted, the refrigerant flowing uniformity is improved,and then the refrigerant flowing noise of an indoor unit is reduced.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method for controlling an electronic expansion valve at the inlet of an evaporator of an indoor unit and a control device for the electronic expansion valve at the inlet of an evaporator of an indoor unit. Background technique [0002] At present, the noise of the refrigerant in the multi-connected system of the related art is mostly caused by the too fast flow of the refrigerant impacting the electronic expansion valve or other throttling components. [0003] When the multi-connected system is running with a small capacity, due to the small energy demand of the system, the condensation capacity is insufficient, the subcooling degree of the refrigerant at the outlet of the condenser is small, and the actual physical state of the refrigerant is a gas-liquid two-phase state. In addition, due to the low operating frequency of the compressor driving the refrigerant flow an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/30F24F11/64F24F13/24F25B41/06F25B41/34
CPCY02B30/70
Inventor 梁鑫杨国忠王命仁谭志军
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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