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Cooling system and control method thereof

A cooling system and control method technology, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of over-temperature burnout of frequency converters, condensation of frequency converters, etc., and achieve the effect of avoiding condensation and not easy to over-temperature

Active Publication Date: 2018-11-09
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, the present invention provides a cooling system and its control method, which can solve the problem that the frequency converter is condensed when the compressor unit is running under a small load condition, and the frequency converter is overheated and burned out when it is running under a heavy load condition.

Method used

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  • Cooling system and control method thereof

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Embodiment Construction

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "top", "bottom", "inner", "outer" etc. is based on the Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0038]In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first", "second", may explicitly or implicitly include one or more of these features.

[0039] In the description of the present invention, ...

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Abstract

The invention discloses a cooling system and a control method thereof. The cooling system comprises a compressor unit, a condenser, a first electromagnetic valve, a second electromagnetic valve, a first throttling valve and a frequency converter, wherein the second electromagnetic valve and the first throttling valve are connected in series and then connected with the first electromagnetic valve in parallel; the compressor unit, the condenser, the first electromagnetic valve and the frequency converter are connected in series so as to form a first cooling loop; the compressor unit, the condenser, the second electromagnetic valve, the first throttling valve and the frequency converter are connected in series so as to form a second cooling loop; and a temperature detection module is arrangedin the frequency converter. A refrigerant of the first cooling loop is not throttled before entering the frequency converter, and the liquid supply temperature is relatively higher, so that the frequency converter can be cooled when the compressor unit runs at the small load condition so as to be prevented from condensing; and a refrigerant of the second cooling loop is throttled by the first throttling valve before entering the frequency converter, the temperature of the throttled refrigerant is lower, and the sufficient cooling amount can be provided for the frequency converter, so that thefrequency converter is not easy to overheat.

Description

technical field [0001] The invention relates to the field of cooling systems, in particular to a cooling system and a control method thereof. Background technique [0002] The variable frequency chiller adjusts the operating load of the unit by changing the operating frequency (speed) of the compressor unit to meet different cooling needs. The frequency converter is a control system used to control and adjust the operating frequency (speed) of the compressor unit, so ensuring the normal operation of the frequency converter is the prerequisite for the stable operation of the air conditioning unit. [0003] The frequency converter will generate heat when it is working, and the rectifier module, inverter module and reactance are the main heat generating components. The greater the operating power of the inverter, the greater the heat generated. If the heat is not taken away in time, the temperature of the inverter will continue to rise. When the temperature is higher than the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F25B41/04F25B49/02F25B41/20
CPCF25B1/00F25B49/02F25B41/40F25B41/20F25B41/39F25B1/10F25B2600/021F25B2700/21154F25B2600/2501F25B2600/2519F25B2400/0411F25B2700/21153F25B2500/14H05K7/20945Y02B30/70F25B41/22
Inventor 刘华张治平李宏波梁湖刘贤权
Owner GREE ELECTRIC APPLIANCES INC
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