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CN-224230365-U - Refrigerating system for adjusting pressure of refrigerating pipeline

CN224230365UCN 224230365 UCN224230365 UCN 224230365UCN-224230365-U

Abstract

The utility model provides a refrigerating system for adjusting pressure of a refrigerating pipeline, which comprises an evaporator, a compressor, a condenser and an electronic expansion valve which are sequentially communicated to form a closed loop, wherein one end of a first pipeline is connected with the evaporator, the other end of the first pipeline is connected with the condenser, a first electromagnetic valve is arranged on the first pipeline and is connected with the electronic expansion valve in series, a bypass pipeline is connected with the first electromagnetic valve in parallel, the inner diameter of the bypass pipeline is smaller than that of the first pipeline, a second electromagnetic valve is arranged on the bypass pipeline, a sensor is used for detecting current of the compressor, and a control device is electrically connected to the sensor and is configured to control the second electromagnetic valve to be opened for a first preset time when the current detected by the sensor is smaller than a first preset current value. The refrigeration system provided by the utility model has the advantages that the flow area of the pipeline in the refrigeration system is effectively reduced, so that the starting pressure difference is easier to establish.

Inventors

  • QIN XIAOHUI
  • WANG YANYAN
  • QU XIANGLE

Assignees

  • 青岛中集特种冷藏设备有限公司
  • 青岛中集冷藏箱制造有限公司
  • 中集集装箱(集团)有限公司
  • 中国国际海运集装箱(集团)股份有限公司

Dates

Publication Date
20260512
Application Date
20250516

Claims (8)

  1. 1. The refrigerating system for adjusting the pressure of the refrigerating pipeline is characterized by comprising an evaporator, a compressor, a condenser and an electronic expansion valve which are sequentially communicated to form a closed loop; One end of the first pipeline is connected with the evaporator, and the other end of the first pipeline is connected with the condenser; the first electromagnetic valve is arranged on the first pipeline and is connected with the electronic expansion valve in series; The bypass pipeline is connected in parallel with the first electromagnetic valve, and the inner diameter of the bypass pipeline is smaller than that of the first pipeline; the second electromagnetic valve is arranged on the bypass pipeline; a sensor for detecting a current of the compressor, and And the control device is electrically connected to the sensor and is configured to control the second electromagnetic valve to be opened for a first preset time when the current detected by the sensor is smaller than a first preset current value.
  2. 2. The refrigeration system of claim 1, wherein said second solenoid valve is closed and said first solenoid valve is opened after said second solenoid valve has been operated for said first predetermined time.
  3. 3. The refrigeration system of claim 1 further comprising a second line, one end of the second line being connected to the outlet of the evaporator and the other end of the second line being connected to the inlet of the compressor; The refrigeration system further comprises a gas-liquid separator, and the gas-liquid separator is arranged on the second pipeline.
  4. 4. The refrigeration system of claim 1 further comprising a third line, one end of the third line being connected to the outlet of the compressor and the other end of the third line being connected to the inlet of the condenser; The refrigeration system further comprises an oil-liquid separator, and the oil-liquid separator is arranged on the third pipeline.
  5. 5. A refrigeration system for regulating the pressure of a refrigeration circuit according to claim 1, the refrigeration system further comprises a liquid reservoir, and the liquid reservoir is arranged in the first pipeline.
  6. 6. A refrigeration system for regulating the pressure of a refrigerant line as recited in claim 5, wherein, the refrigeration system further comprises a filter, wherein the filter is arranged in the first pipeline and is connected with the liquid storage device in series.
  7. 7. A refrigeration system as recited in claim 6 wherein said filter is disposed in series with said first solenoid valve.
  8. 8. A refrigeration system for regulating the pressure of a refrigeration circuit according to claim 1, The first preset current value is in a range of 36A or more and 38A or less, and The first preset time is in a range of 110s or more and 120s or less.

Description

Refrigerating system for adjusting pressure of refrigerating pipeline Technical Field The present utility model relates generally to the field of container refrigeration systems and, more particularly, to a refrigeration system that regulates refrigeration line pressure. Background In the traditional refrigeration scheme, in the low-temperature starting initial process, under the conditions of larger heat load and insufficient heat exchange capacity of a condenser, the problems that the air suction pressure is low, the starting pressure difference is difficult to establish and the like are easily caused when the compressor operates, the surface of an evaporator is easily frosted, a vicious circle is formed after frosting, the frosting is aggravated, meanwhile, the refrigerant is incompletely evaporated, the compressor is caused to suck liquid refrigerant, the compressor is damaged, even the refrigerating system is caused to alarm or stop operation, the refrigerating capacity is reduced, and the expected cooling effect cannot be achieved. Accordingly, there is a need to provide a refrigeration system that regulates the pressure of a refrigeration circuit to at least partially address the above-mentioned problems. Disclosure of utility model In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the utility model is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. In order to at least partially solve the above problems, the present utility model provides a refrigeration system for adjusting the pressure of a refrigeration pipeline, the refrigeration system for adjusting the pressure of the refrigeration pipeline includes an evaporator, a compressor, a condenser and an electronic expansion valve which are sequentially communicated to form a closed loop; One end of the first pipeline is connected with the evaporator, and the other end of the first pipeline is connected with the condenser; the first electromagnetic valve is arranged on the first pipeline and is connected with the electronic expansion valve in series; The bypass pipeline is connected in parallel with the first electromagnetic valve, and the inner diameter of the bypass pipeline is smaller than that of the first pipeline; the second electromagnetic valve is arranged on the bypass pipeline; a sensor for detecting a current of the compressor, and And the control device is electrically connected to the sensor and is configured to control the second electromagnetic valve to be opened for a first preset time when the current detected by the sensor is smaller than a first preset current value. Optionally, after the second electromagnetic valve moves to the first preset time, the second electromagnetic valve is closed, and the first electromagnetic valve is opened. Optionally, the refrigeration system further comprises a second pipeline, one end of the second pipeline is connected to the outlet of the evaporator, and the other end of the second pipeline is connected to the inlet of the compressor; The refrigeration system further comprises a gas-liquid separator, and the gas-liquid separator is arranged on the second pipeline. Optionally, the refrigeration system further comprises a third pipeline, one end of the third pipeline is connected to the outlet of the compressor, and the other end of the third pipeline is connected to the inlet of the condenser; The refrigeration system further comprises an oil-liquid separator, and the oil-liquid separator is arranged on the third pipeline. Optionally, the refrigeration system further comprises a liquid reservoir, and the liquid reservoir is arranged in the first pipeline. Optionally, the refrigeration system further comprises a filter, wherein the filter is arranged in the first pipeline and is arranged in series with the liquid reservoir. Optionally, the filter is disposed in series with the first solenoid valve. Optionally, the first preset current value ranges from 36A to 38A, and The first preset time is in a range of 110s or more and 120s or less. Compared with the prior art, the refrigerating system for regulating the pressure of the refrigerating pipeline has the following structure The beneficial effects are that: When the current detected by the sensor is smaller than a first preset current value, the control device controls the second electromagnetic valve to be opened for a first preset time. Because the internal diameter of the first pipeline is larger than the internal diameter of the bypass pipeline, when the second electromagnetic valve is opened, the flow area of the pipeline in the refrigerating system can be effectively reduced, so that the effect of easily establishing a starting pressure difference is achieved, the subsequent normal operation of th