Refrigeration unit and its control method and control system

A refrigeration unit and control system technology, applied in the field of air conditioning, can solve the problems of poor heating effect, affecting the oil cooler, high power consumption, etc., and achieve the effect of solving poor heating effect and high power consumption

CN105627614BActive Publication Date: 2018-01-09GREE ELECTRIC APPLIANCES INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-01-09

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Abstract

The invention provides a refrigerating unit and its control method and control system. The oil separator is used to directly transfer the refrigerated oil to the compressor, or transfer the refrigerated oil to the compressor through an oil cooler; the cooling tower is used to The refrigerated oil in the cooler and condenser is cooled; the heat recovery tank is used to collect the heat of the refrigerated oil in the oil cooler and condenser, and use the heat to heat the refrigerated oil in the oil cooler and condenser. When the temperature of the refrigerating oil is high, the refrigerating oil in the oil separator can be controlled to be directly transmitted to the compressor. At this time, even if the refrigeration unit maintains a certain water flow rate, it will not affect the heating effect of the refrigerating oil; When the temperature is low, the refrigerated oil in the oil separator can be controlled to be transmitted to the compressor through the oil cooler. At this time, the refrigerated oil in the oil cooler and condenser can be cooled by the heat recovery tank or the heat recovery tank and the heater. Heating, to solve the problems of high power consumption and poor heating effect.
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Description

technical field

[0001] The present invention relates to the technical field of air conditioning, and more specifically, to a refrigeration unit and its control method and control system. Background technique

[0002] Because the existing low-temperature refrigeration unit has the characteristics of low evaporation temperature and large compression ratio, the temperature of the high-pressure steam discharged from the compressor and the refrigerated oil will be relatively high. When the temperature of the refrigerating oil is too high, the cooling water in the oil cooler is required to cool the refrigerating oil before it can be transferred back to the compressor. When the temperature of the refrigerated oil is too low, the heater on the oil separator is required to electrically heat the refrigerated oil to prevent the refrigerated oil from melting into the refrigerant.

[0003] However, relying solely on electric heating to heat the refrigerated oil will not only lead to hig...

Examples

Embodiment Construction

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0057] An embodiment of the present invention provides a refrigeration unit, especially a low-temperature refrigeration unit.

[0058] refer to figure 1 , the refrigerating unit in this embodiment includes an oil separator 1, a compressor 2, an oil cooler 3, a condenser 4, a cooling tower 5 and a heat recovery tank 6, wherein the cooling tower 5 is used for oil cooler 3 and condensing Cool the refrigerating oil in the oil cooler 4, the heat recovery tank 6 is...