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Condensing Unit Exhaust Temperature Control Method

A technology of exhaust temperature and condensing unit, applied in refrigerators, refrigeration components, refrigeration safety arrangements, etc., can solve the problems of reducing suction specific volume, reducing exhaust temperature, reducing system energy efficiency, etc., to ensure the energy efficiency of work. Effect

Active Publication Date: 2017-12-08
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Direct injection of liquid refrigerant into the suction chamber of the compressor will reduce the specific enthalpy of the compressor suction, reduce the specific volume of the suction, thereby achieving the purpose of reducing the discharge temperature, but the liquid spray cooling will reduce the mass flow rate of the system refrigerant at the same time, reduce the energy efficiency of the system

Method used

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  • Condensing Unit Exhaust Temperature Control Method
  • Condensing Unit Exhaust Temperature Control Method

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0018] see figure 1 with figure 2 As shown, according to the embodiment of the present invention, the method for controlling the exhaust temperature of the condensing unit includes: detecting the exhaust temperature of the condensing unit; when T exhaust > To_OFF-A°C, adjust the frequency of the compressor until T exhaust ≤ To_OFF- B°C; where A

[0019] Through the above exhaust temperature control method, the exhaust temperature of the condensing unit can be detected first, and then when it is necessary to control the exhaust temperature of the condensing unit, the exhaust temperature of the condensing unit can ...

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Abstract

The invention discloses a method for controlling the exhaust temperature of a condensing unit. The method for controlling the exhaust temperature of the condensing unit includes: detecting the exhaust temperature of the condensing unit; when T exhaust > To_OFF‑A°C, adjusting the frequency of the compressor until T exhaust ≤ To_OFF‑B°C; where A<B, To_OFF is the system exhaust temperature protection value, and Texhaust is the exhaust temperature. According to the method for controlling the exhaust temperature of the condensing unit of the present invention, the exhaust temperature of the condensing unit can be controlled at an ideal value, while ensuring that the energy efficiency of the condensing unit is at a relatively high value.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method for controlling the exhaust temperature of a condensing unit. Background technique [0002] At present, the lowest evaporation temperature of low-temperature condensing units on the market is generally around -40°C. Due to the low evaporation pressure and high compression ratio of the system, the exhaust temperature is very high, which affects the reliability of the system operation. In order to control the exhaust temperature of the system, many manufacturers adopt liquid spray cooling. Direct injection of liquid refrigerant into the suction chamber of the compressor will reduce the specific enthalpy of the compressor suction, reduce the specific volume of the suction, thereby achieving the purpose of reducing the discharge temperature, but the liquid spray cooling will reduce the mass flow rate of the system refrigerant at the same time, reduce the energy eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02F25B39/04
Inventor 李庆卫广穹李金奎
Owner GREE ELECTRIC APPLIANCES INC
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