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Control method and device for air-replenishing enthalpy increasing

A technology of supplementing air to increase enthalpy and control methods, applied in refrigeration and liquefaction, refrigerators, refrigeration components, etc., can solve the problems of suction with liquid and uncontrollable superheat of supplementary air, so as to prevent suction with liquid and quickly The effect of adjusting the amount of air supply and improving performance

Inactive Publication Date: 2017-07-21
CHONGQING MIDEA GENERAL REFRIGERATING EQUIP +1
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Problems solved by technology

[0006] For this reason, the first purpose of the present invention is to propose a method for controlling enthalpy increase with air supplementation, which is used to solve the problems of uncontrollable superheat of air supplementation and the risk of liquid inhalation in the existing methods of air supplementation and enthalpy increase

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Embodiment Construction

[0034] 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.

[0035] The embodiment of the present invention aims at the problem that in the current technology of supplementing gas to increase enthalpy through a throttling orifice, the degree of superheat of the supplemented gas is uncontrollable, there is a risk of sucking liquid, which affects the performance and service life of the compressor, and a solution is proposed. A control method for supplementing air and increasing enthalpy.

[0036] This method determines the current superheat of the gas supply circuit according to the current ...

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Abstract

The invention provides a control method and device for air-replenishing enthalpy increasing. The method comprises the following steps that the current air-replenishing pressure and temperature of an air-replenishing loop are obtained; and according to the current air-replenishing pressure and temperature, the current superheat degree of the air-replenishing loop is determined. Through the method, according to the difference value of the current superheat degree and a preset superheat degree of the air-replenishing loop, the opening of an electronic control valve is adjusted, the purpose that air suction has an enough superheat degree can be ensured, liquid is prevented from being carried in air suction, and performance of a compressor is improved; and the air-replenishing quantity can be quickly adjusted, it is ensured that a unit can efficiently operate under different working condition loads, and energy saving performance of the unit is greatly improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning control, in particular to a method and device for controlling air supplementation and enthalpy increase. Background technique [0002] At present, compressor units are more and more widely used in chillers. In order to further improve the energy efficiency of the unit, the compressor usually adopts the technology of supplementing air to increase enthalpy. [0003] The key to the implementation of supplementary air to increase enthalpy lies in the control of supplementary air volume and supplementary air superheat. The supplementary air volume should be able to adapt to changes in different working conditions. The implementation of gas enthalpy increase cannot achieve the desired effect, and it will also cause the compressor to run with liquid, which will damage the compressor to a certain extent and affect its service life. [0004] In the prior art, a throttling orifice is usually used...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02
CPCF25B49/02F25B2600/2513
Inventor 杨志华王永
Owner CHONGQING MIDEA GENERAL REFRIGERATING EQUIP
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