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VRF air conditioning system recooling circuit flow control method and device

A technology of flow control device and multi-line system, which is applied in the direction of refrigeration and liquefaction, refrigerators, refrigeration components, etc., can solve the problems of refrigerant flow reduction and affect the cooling effect of refrigeration internal units, and achieve the effect of precise control

Active Publication Date: 2015-12-02
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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  • Summary
  • Abstract
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Problems solved by technology

[0003] The opening of the electronic expansion valve will affect the flow of refrigerant entering the refrigeration unit. For example, when the opening of the electronic expansion valve is improper, the flow of refrigerant entering the refrigeration unit will decrease, thereby affecting the cooling effect of the refrigeration unit.

Method used

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  • VRF air conditioning system recooling circuit flow control method and device
  • VRF air conditioning system recooling circuit flow control method and device
  • VRF air conditioning system recooling circuit flow control method and device

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Embodiment Construction

[0025] 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.

[0026] figure 1 It is a flowchart of a flow control method for a recooling circuit of a multi-line system according to an embodiment of the present invention.

[0027] In the embodiment of the present invention, such as figure 2 As shown, the multi-line system includes a subcooling circuit composed of a first heat exchanger, a second heat exchanger, a first electronic expansion valve, and a second electronic expansion valve, as well as a flow divider and a first A pressure sensor, a second pressure sensor, a first temperature ...

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Abstract

The invention discloses a VRF air conditioning system recooling circuit flow control method and device; the method comprises the following steps: calculating a pressure difference between two ends of a second electron expansion valve according to pressure values of a first pressure sensor and a second pressure sensor; obtaining a first refrigerant flow of a heating inner machine, and obtaining a second refrigerant flow of a refrigeration inner machine; calculating a third refrigerant flow according to the first and second refrigerant flows; controlling opening degree of the second electron expansion valve according to the pressure difference and the third refrigerant flow. The VRF air conditioning system recooling circuit flow control method can accurately control refrigerating capacity of the refrigeration inner machine.

Description

technical field [0001] The invention relates to the technical field of electrical appliances, in particular to a flow control method and device for a recooling circuit of a multi-line system. Background technique [0002] When the two-pipe heat recovery multi-connected system operates in the main heating mode, part of the refrigerant re-cooled by the heat exchanger passes through the electronic expansion valve and finally enters the low-pressure pipe of the outdoor unit, and the other part enters the outdoor after absorbing heat through the refrigeration internal unit. Machine low-pressure pipe. [0003] Since the opening of the electronic expansion valve will affect the refrigerant flow into the refrigeration inner unit, for example, when the opening of the electronic expansion valve is improper, the refrigerant flow into the refrigeration inner unit will decrease, thereby affecting the cooling effect of the refrigeration inner unit. Contents of the invention [0004] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B41/04F25B49/02F25B41/34
Inventor 罗彬李元阳
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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