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Variable-frequency refrigerating system and control method thereof

A refrigeration system and controller technology, which is applied to refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of low temperature control of variable frequency refrigeration systems, and achieve the effect of simple structure and improved operation efficiency.

Active Publication Date: 2021-01-12
ZHEJIANG BOYANG COMPRESSOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of low temperature control of the frequency conversion refrigeration system, the present invention provides a frequency conversion refrigeration system and its control method, which can improve the temperature control accuracy of the frequency conversion refrigeration system

Method used

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  • Variable-frequency refrigerating system and control method thereof

Examples

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Embodiment 1

[0064] like figure 1 As shown, this embodiment provides a frequency conversion refrigeration system, including a compressor 1, a condenser 2, a condensing fan 3, a liquid storage tank 4, and an evaporator 5 connected in sequence, and the connection between the condenser 2 and the liquid storage tank 4 A condensation temperature sensor 9 is arranged on the pipeline, the high-pressure outlet of the compressor 1 is connected to the condenser 2, an exhaust temperature sensor 20 is arranged at the high-pressure outlet of the compressor 1, and a low-pressure outlet of the compressor 1 It is connected to the outlet of the evaporator 5, and also includes a solenoid valve 6, an electronic expansion valve 7, an oil separator 8 and a controller 19. The solenoid valve 6 and the electronic expansion valve 7 are sequentially arranged at the outlet of the liquid storage tank 4 and the evaporator 5 On the pipeline between the inlets, the oil separator 8 is arranged on the pipeline between the...

Embodiment 2

[0067] Embodiment 2 is to carry out further optimization on the basis of embodiment 1, and specific implementation scheme is as follows:

[0068] like figure 1 As shown, this embodiment provides a frequency conversion refrigeration system, including a compressor 1, a condenser 2, a condensing fan 3, a liquid storage tank 4, and an evaporator 5 connected in sequence, and the connection between the condenser 2 and the liquid storage tank 4 A condensation temperature sensor 9 is arranged on the pipeline, the high-pressure outlet of the compressor 1 is connected to the condenser 2, an exhaust temperature sensor 20 is arranged at the high-pressure outlet of the compressor 1, and a low-pressure outlet of the compressor 1 It is connected to the outlet of the evaporator 5, and also includes a solenoid valve 6, an electronic expansion valve 7, an oil separator 8 and a controller 19. The solenoid valve 6 and the electronic expansion valve 7 are sequentially arranged at the outlet of the...

Embodiment 3

[0071] like Figure 1-3 As shown, this embodiment provides an intelligent control method for a frequency conversion refrigeration system. According to any one of the technical solutions of Embodiment 1-2, a frequency conversion refrigeration system includes:

[0072] like figure 2 As shown, the compressor operating frequency control:

[0073] (1) The controller 19 controls, records, and reads the temperature in the cabinet (Tc) and the set temperature (Ts) in the cabinet, and the difference between the temperature in the cabinet (Tc) and the set temperature (Ts) in the cabinet is the temperature difference, the temperature range in the cabinet is -10℃~10℃;

[0074] (2) The operating frequency of the compressor 1 is controlled by the controller 19, and the operating frequency range of the compressor 1 is divided into 14 frequency segments, respectively marked as X1, X2, X3, X4, X5, X6, X7 , X8, X9, X10, X11, X12, X13, X14, each frequency value is read into the EEPROM, and e...

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Abstract

The invention discloses a variable-frequency refrigerating system and a control method thereof, and relates to the technical field of refrigerating equipment. The refrigerating system comprises a compressor, a condenser, a condensate fan, a liquid storage tank and an evaporator which are sequentially connected, wherein a condensation temperature sensor is arranged on a pipeline between the condenser and the liquid storage tank; a high-pressure outlet of the compressor is connected with the condenser; an exhaust temperature sensor is arranged at the high-pressure outlet of the compressor; a low-pressure outlet of the compressor is connected with an outlet of the evaporator. The refrigerating system further comprises an electromagnetic valve, an electronic expansion valve, an oil separator and a controller, wherein the electronic electromagnetic valve and the electronic expansion valve are sequentially arranged on a pipeline between an outlet of the liquid storage tank and an inlet of the evaporator; and the oil separator is arranged on a pipeline between the high-pressure outlet of the compressor and an inlet of the condenser. The control method of the variable-frequency refrigerating system comprises the steps of compressor running frequency control, exhaust temperature control, electronic expansion valve control, condensate fan control, heat exchanger coil temperature control,outdoor unit current control and compressor current control. The temperature control degree can be improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a frequency conversion refrigeration system and a control method thereof. Background technique [0002] The main devices of the refrigeration cycle include: refrigeration compressors, condensers, electronic expansion valves, and evaporators. The principle of the refrigeration cycle is that the refrigerant absorbs heat in the low-temperature and low-pressure liquid state and then evaporates into a low-temperature and low-pressure steam. The refrigerant evaporated into a gas becomes a high-temperature and high-pressure gas under the action of the compressor, and the high-temperature and high-pressure condensation becomes a high-pressure liquid. The liquid turns into a low-pressure low-temperature liquid through the electronic expansion valve, and then absorbs heat and evaporates again to form the refrigeration cycle of the refrigerator. The function of the condense...

Claims

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Application Information

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IPC IPC(8): F25B1/00F25B31/00F25B41/20F25B41/34F25B43/00F25B43/02F25B49/02
CPCF25B1/00F25B31/004F25B43/006F25B43/003F25B43/02F25B49/022F25B2600/021F25B2700/21163Y02B30/70
Inventor 陈增辉陈建平徐敏铭
Owner ZHEJIANG BOYANG COMPRESSOR
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