CN220287803U - Temperature rise and fall control system - Google Patents
Temperature rise and fall control system Download PDFInfo
- Publication number
- CN220287803U CN220287803U CN202321995309.XU CN202321995309U CN220287803U CN 220287803 U CN220287803 U CN 220287803U CN 202321995309 U CN202321995309 U CN 202321995309U CN 220287803 U CN220287803 U CN 220287803U
- Authority
- CN
- China
- Prior art keywords
- refrigerant
- pressure
- compressor
- pipeline
- generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003507 refrigerant Substances 0.000 claims abstract description 121
- 230000001502 supplementing effect Effects 0.000 claims abstract description 17
- 238000007599 discharging Methods 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 8
- 238000005057 refrigeration Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model relates to the technical field of temperature control systems, in particular to a temperature rise and fall control system; the device comprises a refrigerant generator, a refrigerant quantity output controller, a refrigerant converter, a pressure detector and a refrigerant supplementing controller; one end of the refrigerant generator is a low-pressure end, the other end of the refrigerant generator is a high-pressure end, and the refrigerant generator is sequentially provided with a refrigerant quantity output controller and a refrigerant converter along one pipeline of the high-pressure end; the refrigerant generator is sequentially provided with a refrigerant supplementing controller and a pressure detector along the other pipeline of the high-pressure end; the utility model is provided with a pressure detector and a refrigerant supplementing controller; the energy saving of the refrigerating system can be ensured, and the situation that the heat dissipation of the compressor motor is poor or the compressor cylinder is blocked and pulled to be damaged due to too little refrigerant in the compressor can be avoided.
Description
Technical Field
The utility model relates to the technical field of temperature control systems, in particular to a temperature rise and fall control system.
Background
At present, the refrigeration system with the energy-saving function is characterized in that the temperature of the refrigeration system is reduced gradually to reduce the refrigerant flowing into an evaporator so as to realize energy saving. Some are realized by closing the opening of the electronic expansion valve, and others are realized by shortening the opening time of the quick-opening valve. In the process, if the opening degree of the electronic expansion valve is too small or the closing time of the quick opening valve is too long, the air return pressure of the compressor is too low, and a mechanical low-pressure protection switch is triggered to give an alarm to stop operation. And when the return air pressure is low, the quantity of the refrigerant flowing back is small, so that poor heat dissipation of a compressor motor is caused, and when the return air pressure is serious, the compressor cylinder clamping and cylinder pulling are also caused to be damaged.
Based on the above problems, we propose a temperature rise and fall control system.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides the temperature rise and fall control system, which can ensure the energy conservation of a refrigerating system through structural improvement, and can also avoid the situation that the heat dissipation of a compressor motor is poor or the compressor cylinder is blocked and pulled to be damaged due to too little refrigerant in the compressor.
The technical scheme of the utility model is as follows:
a temperature rise and fall control system comprises a refrigerant generator, a refrigerant quantity output controller, a refrigerant converter, a pressure detector and a refrigerant supplementing controller;
one end of the refrigerant generator is a low-pressure end, the other end of the refrigerant generator is a high-pressure end, and the refrigerant generator is sequentially provided with a refrigerant quantity output controller and a refrigerant converter along one pipeline of the high-pressure end; the refrigerant quantity output controller is used for reducing or increasing the output of the refrigerant quantity; the refrigerant converter is used for converting the refrigerant into cool air and discharging the cool air;
the refrigerant generator is sequentially provided with a refrigerant supplementing controller and a pressure detector along the other pipeline of the high-pressure end, and the pressure detector is positioned on the pipeline of the low-pressure end.
Further, the refrigerant generator is a compressor; the refrigerant quantity output controller is an electronic expansion valve; the refrigerant converter is an evaporator; the pressure detector is an electronic pressure sensor; the refrigerant supplementing controller is an SV5 electromagnetic valve.
Further, a condenser is arranged on a pipeline between the compressor and the electronic expansion valve.
Further, a dryer and a refrigerant window are sequentially arranged on a pipeline between the condenser and the electronic expansion valve.
Further, an oil separator is installed on a pipe between the compressor and the condenser.
Further, a temperature sensor is arranged on a pipeline between the compressor and the oil separator, an SV2 electromagnetic valve is also arranged on a pipeline between the refrigerant window and the electronic expansion valve, and the SV2 electromagnetic valve is connected with the compressor through the pipeline.
The beneficial effects of the utility model are as follows:
the utility model is provided with a pressure detector and a refrigerant supplementing controller; when the pressure detector detects that the pressure of the low pressure end is lower than a set value, the quantity of refrigerant flowing back by the compressor is reduced, and in order to avoid the situation that the heat dissipation of the compressor motor is poor due to the fact that the quantity of refrigerant in the compressor is too small, the control system controls the refrigerant supplementing controller to flow a part of refrigerant coming out of the high pressure end back to the compressor, so that energy conservation of a refrigerating system can be ensured, and the situation that the heat dissipation of the compressor motor is poor due to the fact that the quantity of refrigerant in the compressor is too small, or the compressor is damaged due to the fact that a cylinder is clamped or pulled can be avoided.
Drawings
Fig. 1 is a schematic diagram of a system of the present utility model.
In the figure, 1, a refrigerant generator; 2. a refrigerant quantity output controller; 3. a refrigerant converter; 4. a pressure detector; 5. a refrigerant replenishment controller; 6. a condenser; 7. a dryer; 8. a refrigerant window; 9. an oil separator; 10. a temperature sensor; 11. SV2 solenoid valve.
Detailed Description
The following is a further description of embodiments of the utility model, taken in conjunction with the accompanying drawings:
as shown in fig. 1, a temperature rise and fall control system comprises a refrigerant generator 1, a refrigerant quantity output controller 2, a refrigerant converter 3, a pressure detector 4 and a refrigerant supplementing controller 5;
one end of the refrigerant generator 1 is a low-pressure end, the other end of the refrigerant generator 1 is a high-pressure end, the refrigerant generated by the refrigerant generator 1 is output through a high-pressure end pipeline and flows back into the refrigerant generator 1 through a low-pressure end pipeline to form a refrigerant conveying loop, and the refrigerant generator 1 is sequentially provided with a refrigerant quantity output controller 2 and a refrigerant converter 3 along one pipeline of the high-pressure end; the refrigerant quantity output controller 2 is used for reducing or increasing the output of the refrigerant quantity; the refrigerant converter 3 is used for converting the refrigerant into cool air and discharging the cool air;
the refrigerant generator 1 is sequentially provided with a refrigerant supplementing controller 5 and a pressure detector 4 along the other pipeline of the high-pressure end, and the pressure detector 4 is positioned on the pipeline of the low-pressure end; the low pressure end is also called an air return pressure end, the pressure detector 4 is used for detecting air return pressure, the control system is provided with minimum air return pressure, and if the air return pressure detected by the pressure detector 4 is lower than the set minimum air return pressure, the control system controls the refrigerant supplementing controller 5 to act so as to supplement the refrigerant to the refrigerant generator 1; the refrigerant generator 1 is a compressor; the refrigerant quantity output controller 2 is an electronic expansion valve; the refrigerant converter 3 is an evaporator; the pressure detector 4 is an electronic pressure sensor; the refrigerant supplementing controller 5 is an SV5 electromagnetic valve.
As a preferred embodiment; a condenser 6 is arranged on the pipeline between the compressor and the electronic expansion valve. The condenser 6 is used for cooling the refrigerant so as to meet the cooling requirement.
As a preferred embodiment; and a dryer 7 and a refrigerant window 8 are sequentially arranged on a pipeline between the condenser 6 and the electronic expansion valve. The dryer 7 is used for drying the refrigerant and improving the conversion quality of the subsequent refrigerant; the refrigerant window 8 is used for observing the output of the refrigerant quantity.
As a preferred embodiment; an oil separator 9 is installed on the pipe between the compressor and the condenser 6. The oil separator 9 is used for separating oil from gas of the refrigerant and improving the use quality of the refrigerant.
As a preferred embodiment; a temperature sensor 10 is arranged on a pipeline between the compressor and the oil separator 9, an SV2 electromagnetic valve 11 is also arranged on a pipeline between the refrigerant window 8 and the electronic expansion valve, and the SV2 electromagnetic valve 11 is connected with the compressor through a pipeline. By providing the temperature sensor 10, when the discharge temperature of the compressor is higher than 110 ℃ set by the control system, the SV2 electromagnetic valve 11 is opened; at this time, a part of refrigerant flows to a low-pressure return air end of the compressor through the SV2 electromagnetic valve 11; and cooling the refrigerant to be returned to the compressor, so as to prevent damage caused by overheat of the compressor.
It should be noted that the present utility model is a two-stage refrigeration system, one of which is described above, the control principle of the other section (also in the schematic diagram) is the same as that of the first section, and will not be described in detail. In addition, the control principle can be applied to a two-stage refrigeration system and a multi-stage refrigeration system, and in the multi-stage refrigeration system, each compressor can be added with the control principle, and each path of protection is independently operated and is not affected.
The working principle of the utility model is as follows: in order to save energy and protect the compressor, the refrigerating system does not trigger low-pressure alarm and can stably operate for a long time. The mechanical low-pressure protection switch at the low-pressure return air end of the original compressor is replaced by the electronic pressure sensor (namely the pressure detector 4) provided by the utility model, and the return air pressure of the compressor is measured; the control system can be provided with a minimum return air pressure and an alarm value. The refrigerating system can check whether the return air pressure measured by the electronic pressure sensor is lower than the set minimum return air pressure in real time in the energy saving process. If the measured return air pressure is lower than the set minimum return air pressure, the control system controls the SV5 solenoid valve (i.e. the refrigerant replenishment controller 5) to act through PID. When the SV5 solenoid valve is sucked, a part of refrigerant from the high-pressure end flows back to the compressor. Therefore, the air return pressure of the compressor is improved (the refrigerant increasing process) and the refrigerating effect is not changed (the opening and closing angle of the refrigerant quantity output controller 2 is larger in the initial refrigerating process, so that more refrigerant is output in a short time to reduce the temperature, and when the energy-saving stage is started, namely the required temperature is reached, at the moment, the opening and closing angle of the refrigerant quantity output controller 2 is reduced, so that the output of the refrigerant is reduced, and the energy-saving effect is achieved. When the return air pressure approaches the set minimum return air pressure, the PID shortens the suction time of the SV5 solenoid valve, and always keeps the return air pressure above the set minimum return air pressure. If the refrigerant leakage or the SV5 electromagnetic valve damage causes the return air pressure to be lower than the set return air pressure alarm value, the control system can pop up the low-pressure abnormal alarm of the compressor and immediately stop running.
It should be noted that the main problems in the prior art are: if the opening degree of the electronic expansion valve is too small or the closing time of the quick-opening valve is too long, the air return pressure of the compressor is too low, and a mechanical low-pressure protection switch is triggered to alarm and stop running (directly causing stopping and influencing the production efficiency). In addition, the refrigerant flowing back is less when the return air pressure is low, so that the heat dissipation of the compressor motor is poor, and the compressor cylinder clamping and cylinder pulling are damaged when the return air pressure is severe.
Thus, after the improvement of the application, the pressure detector 4 and the refrigerant supplementing controller 5 are arranged; when the pressure detector 4 detects that the pressure at the low pressure end is lower than the set value, the quantity of the refrigerant flowing back by the compressor is reduced, so that the situation that the heat dissipation of the motor of the compressor is poor due to the fact that the refrigerant in the compressor is too small can be avoided, and the control system controls the refrigerant supplementing controller 5 to flow a part of the refrigerant coming out of the high pressure end back into the compressor, so that the energy saving of the refrigerating system can be ensured, the normal operation (stopping prevention) of the refrigerating system is ensured, and the situation that the heat dissipation of the motor of the compressor is poor due to the fact that the refrigerant in the compressor is too small, or the clamping cylinder and the pulling cylinder of the compressor are damaged can be avoided.
The above embodiments are merely illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solution of the present utility model should fall within the scope of protection defined by the claims of the present utility model without departing from the spirit of the design of the present utility model.
Claims (6)
1. A temperature rise and fall control system, characterized in that:
the device comprises a refrigerant generator, a refrigerant quantity output controller, a refrigerant converter, a pressure detector and a refrigerant supplementing controller;
one end of the refrigerant generator is a low-pressure end, the other end of the refrigerant generator is a high-pressure end, and the refrigerant generator is sequentially provided with a refrigerant quantity output controller and a refrigerant converter along one pipeline of the high-pressure end; the refrigerant quantity output controller is used for reducing or increasing the output of the refrigerant quantity; the refrigerant converter is used for converting the refrigerant into cool air and discharging the cool air;
the refrigerant generator is sequentially provided with a refrigerant supplementing controller and a pressure detector along the other pipeline of the high-pressure end, and the pressure detector is positioned on the pipeline of the low-pressure end.
2. A temperature rise and fall control system as claimed in claim 1, wherein: the refrigerant generator is a compressor; the refrigerant quantity output controller is an electronic expansion valve; the refrigerant converter is an evaporator; the pressure detector is an electronic pressure sensor; the refrigerant supplementing controller is an SV5 electromagnetic valve.
3. A temperature raising and lowering control system according to claim 2, wherein: and a condenser is arranged on a pipeline between the compressor and the electronic expansion valve.
4. A temperature raising and lowering control system according to claim 3, wherein: and a dryer and a refrigerant window are sequentially arranged on a pipeline between the condenser and the electronic expansion valve.
5. The system of claim 4, wherein: an oil separator is arranged on a pipeline between the compressor and the condenser.
6. A temperature raising and lowering control system according to claim 5, wherein: and a temperature sensor is arranged on a pipeline between the compressor and the oil separator, an SV2 electromagnetic valve is also arranged on a pipeline between the refrigerant window and the electronic expansion valve, and the SV2 electromagnetic valve is connected with the compressor through the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321995309.XU CN220287803U (en) | 2023-07-26 | 2023-07-26 | Temperature rise and fall control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321995309.XU CN220287803U (en) | 2023-07-26 | 2023-07-26 | Temperature rise and fall control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220287803U true CN220287803U (en) | 2024-01-02 |
Family
ID=89339182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321995309.XU Active CN220287803U (en) | 2023-07-26 | 2023-07-26 | Temperature rise and fall control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220287803U (en) |
-
2023
- 2023-07-26 CN CN202321995309.XU patent/CN220287803U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111520925B (en) | Compressor air supply system and compressor air supply control method | |
| TWI468592B (en) | Control system | |
| JP5209007B2 (en) | System and method for controlling stability in a centrifugal compressor | |
| CN111928421B (en) | Air-supplementing enthalpy-increasing heat pump system and early warning control method thereof | |
| CN109099610B (en) | Air-supplementing enthalpy-increasing refrigerating system, air conditioner and air conditioner control method | |
| CN102353117B (en) | System protection method for sudden indoor load change of variable refrigerant volume (VRV) air conditioner | |
| CN102901320B (en) | Control method of refrigerator applicable to high-temperature environment | |
| CN103629873A (en) | Control method of two-stage compression air conditioning system | |
| US11274864B2 (en) | Air-conditioning apparatus | |
| CN107965937A (en) | A kind of refrigeration unit and its evacuation halt control method | |
| WO2022068307A1 (en) | Water-cooling heat pump unit and control method therefor | |
| US11859605B2 (en) | Compressor system, and control method for same | |
| CN1246657C (en) | Condenser pressure-retaining energy-saving type refrigeration system for refrigerator | |
| CN113310235B (en) | Cascade type variable frequency heat pump system capable of automatically switching high and low condensation and operation method | |
| CN220287803U (en) | Temperature rise and fall control system | |
| JP2010002173A (en) | Refrigerator | |
| CN103673440A (en) | Refrigerated dryer with electronic bypass type energy adjusting function | |
| CN117128667A (en) | Control method for electronic expansion valve of EVI (variable displacement heat pump) system of low-temperature air source heat pump unit | |
| CN106949683B (en) | Flexible pressure control system for low-temperature refrigeration and cooling of mixed working medium and operation method thereof | |
| CN112113364A (en) | Water chilling unit and control method | |
| KR20130000355A (en) | Steam driven compressor | |
| CN113418328B (en) | Control method for refrigerating and freezing unit and refrigerating and freezing unit | |
| CN111895673B (en) | Magnetic suspension centrifugal unit, start-up control method and device thereof, medium and air conditioner | |
| CN113739338B (en) | Liquid collection control method and system of air conditioner and air conditioner | |
| CN113883600A (en) | Air conditioner double-compressor refrigerating system and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |