CN210760426U - Refrigerating unit with refrigerating system protection function - Google Patents
Refrigerating unit with refrigerating system protection function Download PDFInfo
- Publication number
- CN210760426U CN210760426U CN201921901708.9U CN201921901708U CN210760426U CN 210760426 U CN210760426 U CN 210760426U CN 201921901708 U CN201921901708 U CN 201921901708U CN 210760426 U CN210760426 U CN 210760426U
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- pressure
- refrigerating unit
- refrigerating
- chip microcomputer
- single chip
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Abstract
The utility model discloses a refrigerating unit with the function of protecting a refrigerating system, which comprises a refrigerating unit and a refrigerator control system used for controlling the refrigerating unit; the refrigerating unit comprises an evaporator and a compressor which are connected through a low-pressure pipeline; the refrigerator control system comprises a single chip microcomputer; the refrigerating unit also comprises a pressure sensor and an electronic pressure regulating valve which are arranged on the low-pressure pipeline; the pressure sensor is used for detecting the pressure value in the low-pressure pipeline and transmitting the value to the single chip microcomputer; and the single chip microcomputer sends a control signal to adjust the valve opening of the electronic pressure regulating valve in real time through a pressure value fed back by the pressure sensor. The utility model has the advantages of simple structure and good use effect. The requirement of large refrigerant flow for quick cooling can be met, the stability of a refrigerating system can be protected during defrosting or heating, and the reliability of system operation is improved.
Description
Technical Field
The utility model belongs to the technical field of the refrigerator car and specifically relates to a refrigerating unit with protection refrigerating system function is related to.
Background
The refrigerating unit is assembled on a special transport vehicle for refrigerating, and the refrigerating vehicle is used for transporting products such as frozen food, dairy products, vegetables, fruits, vaccines, medicines and the like which are closely related to human life. More and more refrigerator car users put higher demands on the cooling rate, and the stability and reliability of the refrigeration system are also more and more important.
At present, most of refrigerating units commonly used in the market are provided with an air suction pressure regulating valve KVL (mechanical type) or even are not provided with the air suction pressure regulating valve, the phenomenon that the temperature reduction is slow due to the fact that the flow of a refrigerant is limited can occur, and if the air suction pressure regulating valve is not arranged, the condition that a compressor is damaged in defrosting or heating can occur.
Disclosure of Invention
An object of the utility model is to provide a refrigerating unit with protection refrigerating system function.
In order to achieve the above purpose, the utility model can adopt the following technical proposal:
the refrigerating unit with the function of protecting the refrigerating system comprises a refrigerating unit and a refrigerator control system for controlling the refrigerating unit;
the refrigerating unit comprises an evaporator and a compressor which are connected through a low-pressure pipeline;
the refrigerator control system comprises a single chip microcomputer;
the refrigerating unit also comprises a pressure sensor and an electronic pressure regulating valve which are arranged on the low-pressure pipeline;
the pressure sensor is used for detecting the pressure value in the low-pressure pipeline and transmitting the value to the single chip microcomputer;
and the single chip microcomputer sends a control signal to adjust the valve opening of the electronic pressure regulating valve in real time through a pressure value fed back by the pressure sensor.
The utility model has the advantages of simple structure and good use effect. The pressure sensor is used for acquiring the pressure of the low-pressure pipeline in real time and transmitting the pressure to the single chip microcomputer, the single chip microcomputer controls the electronic pressure regulating valve to regulate the opening of the valve in real time according to a target pressure value, the requirement of rapid cooling for large refrigerant flow can be met, the stability of a refrigerating system can be protected when defrosting or heating is carried out, and the reliability of system operation is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic block circuit diagram of the present invention.
Detailed Description
As shown in fig. 1 and 2, the refrigerating unit with the function of protecting the refrigerating system of the present invention includes a refrigerating unit and a refrigerator control system for controlling the refrigerating unit;
the refrigerating unit comprises an evaporator 2 and a compressor 3 which are connected through a low-pressure pipeline 1;
the refrigerator control system comprises a single chip microcomputer;
the refrigerating unit also comprises a pressure sensor 4 and an electronic pressure regulating valve 5 which are arranged on the low-pressure pipeline 1;
the pressure sensor 4 is used for detecting the pressure value in the low-pressure pipeline 1 and transmitting the value to the single chip microcomputer;
the single chip microcomputer sends a control signal to adjust the valve opening of the electronic pressure regulating valve 5 in real time through the pressure value fed back by the pressure sensor 4.
The working principle is as follows: the conventional refrigerating unit mainly comprises a compressor 3, an oil separator 6, a main stop valve 7, a condenser 8, a liquid storage device 9, a drying filter 10, a liquid viewing mirror 11, a stop valve 12, an expansion valve 13, an evaporator 2, a defrosting valve 14 and other elements; this application sets up electronic pressure control valve 5 and pressure sensor 4 on low-pressure pipeline 1 between 2 exports of evaporimeter and 3 induction ports of compressor to be connected the signal output part of pressure sensor 4 and the signal input part electricity of cold quick-witted control system's singlechip, be connected the control input part of electronic pressure control valve 5 and the control output part electricity of singlechip.
During refrigeration, the exhaust gas of the compressor 3 enters the oil separator 6, and the oil separated by the oil separator 6 returns to the compressor 3; the high-temperature high-pressure gas passing through the oil separator 6 passes through the main stop valve 7, is cooled by the condenser 8, and then enters the liquid storage device 9; the liquid from the liquid storage device 9 passes through a drying filter 10 and a liquid viewing mirror 11, and flows to the evaporator 2 through an expansion valve 13 in a throttling mode; the refrigerant flowing out of the evaporator 2 returns to the compressor 3 through the electronic pressure regulating valve 5;
like this, pressure sensor 4 can gather the transmission pressure value in real time when the refrigeration to send numerical value to the singlechip in real time, the singlechip is according to the pressure value of pressure sensor 4 feedback, and real time control adjusts the valve opening of electronic pressure regulating valve 5, handles the refrigerant low pressure demand under the different cold volume loads, fully gives play to refrigerating system ability, reaches rapid cooling's purpose.
When heating or defrosting is carried out, the main stop valve 7 is closed, high-temperature and high-pressure gas passing through the oil separator 6 flows to the evaporator 2 through the defrosting valve 14 to be heated or defrosted, and then returns to the compressor 3 through the electronic pressure regulating valve 5;
therefore, when defrosting or heating is performed, the electronic pressure regulating valve 5 is stabilized to a required valve opening value strictly according to the system reliability requirement, the suction pressure is controlled, the compressor 3 is prevented from being damaged by overhigh pressure or liquid compression, and the refrigerating system is protected.
Claims (1)
1. A refrigerating unit with a function of protecting a refrigerating system comprises the refrigerating unit and a refrigerator control system used for controlling the refrigerating unit;
the refrigerating unit comprises an evaporator and a compressor which are connected through a low-pressure pipeline;
the refrigerator control system comprises a single chip microcomputer;
the method is characterized in that: the refrigerating unit also comprises a pressure sensor and an electronic pressure regulating valve which are arranged on the low-pressure pipeline;
the pressure sensor is used for detecting the pressure value in the low-pressure pipeline and transmitting the value to the single chip microcomputer;
and the single chip microcomputer sends a control signal to adjust the valve opening of the electronic pressure regulating valve in real time through a pressure value fed back by the pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921901708.9U CN210760426U (en) | 2019-11-06 | 2019-11-06 | Refrigerating unit with refrigerating system protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921901708.9U CN210760426U (en) | 2019-11-06 | 2019-11-06 | Refrigerating unit with refrigerating system protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210760426U true CN210760426U (en) | 2020-06-16 |
Family
ID=71032685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921901708.9U Active CN210760426U (en) | 2019-11-06 | 2019-11-06 | Refrigerating unit with refrigerating system protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210760426U (en) |
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2019
- 2019-11-06 CN CN201921901708.9U patent/CN210760426U/en active Active
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