CN214841801U - Refrigerating system capable of being started quickly in low-temperature environment - Google Patents
Refrigerating system capable of being started quickly in low-temperature environment Download PDFInfo
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- CN214841801U CN214841801U CN202121612269.7U CN202121612269U CN214841801U CN 214841801 U CN214841801 U CN 214841801U CN 202121612269 U CN202121612269 U CN 202121612269U CN 214841801 U CN214841801 U CN 214841801U
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Abstract
The utility model relates to a refrigeration technology field especially relates to a but refrigerating system of quick start under low temperature environment. The outdoor unit comprises a compressor, a condenser, a liquid storage tank and a refrigerant heating device; the inlet of the compressor is provided with a gas-liquid separator, the outlet of the compressor is connected with the inlet of the condenser, the exhaust pipe of the compressor is also connected with the inlet end pipeline of the liquid storage tank through a bypass pipe, and the bypass pipe is provided with a first electromagnetic valve; the outlet of the condenser is connected with the inlet of the liquid storage tank, and the outlet pipeline is also provided with a high-pressure sensor and a first one-way valve; the outlet of the liquid storage tank is connected with the refrigerant heating device through a group of pipelines. The utility model discloses a but set up the high-low differential pressure between outdoor side and the indoor side and make refrigerating unit start fast reliably under low temperature environment. The speed and the reliability of the refrigeration system during starting in a low-temperature environment are improved.
Description
Technical Field
The utility model relates to a refrigeration technology field especially relates to a but refrigerating system of quick start under low temperature environment.
Background
In life, a plurality of scenes need to be refrigerated in a low-temperature environment, for example, the room environment needs to be cooled all the year round, or indoor showcases or wine cellars need to be refrigerated in the north under the condition of indoor central heating in winter, and the like. However, in some places, the outdoor environment is low in winter, and the refrigerant in the refrigeration system can slowly migrate to the outdoor side in the case of the shutdown of the refrigeration system. When the system is restarted, the compressor cannot absorb the refrigerant in time and cannot establish low pressure due to insufficient refrigerant on the indoor side, the condenser cannot establish high pressure, and the compressor cannot be normally started due to frequent shutdown of the compressor due to a low-pressure protection program. Generally, such a refrigeration system is equipped with a low-temperature component, but the low-temperature component has poor effect when the ambient temperature is low, and normal starting of the system cannot be guaranteed. Therefore, the refrigeration system which is high in starting reliability and high in speed in the low-temperature environment is needed to be provided for the reason that the low-temperature assembly is poor in effect when the environment temperature is low and normal starting of the system cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
A refrigerating system capable of being started quickly in a low-temperature environment comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compressor, a condenser, a liquid storage tank and a refrigerant heating device; the inlet of the compressor is provided with a gas-liquid separator, the outlet of the compressor is connected with the inlet of the condenser, the exhaust pipe of the compressor is also connected with the inlet end pipeline of the liquid storage tank through a bypass pipe, and the bypass pipe is provided with a first electromagnetic valve; the outlet of the condenser is connected with the inlet of the liquid storage tank, and the outlet pipeline is also provided with a high-pressure sensor and a first one-way valve; the outlet of the liquid storage tank is connected with a refrigerant heating device through a group of pipelines, a second electromagnetic valve and a first electronic expansion valve are arranged on the pipelines, and the outlet of the refrigerant heating device is connected with the inlet pipeline of the gas-liquid separator; and the inlet pipeline of the gas-liquid separator is provided with a low-pressure sensor.
In one embodiment, the refrigerant heating device is formed by winding an electric heating wire outside a refrigerant pipeline, and wrapping a heat-insulating foaming material layer on the periphery of the refrigerant pipeline.
In one embodiment, the heating power of the refrigerant heating device can be controlled according to the pressure of the low-pressure sensor.
In one embodiment, a set of temperature sensors is arranged on the air suction pipe and the air discharge pipe of the compressor.
In one embodiment, the indoor unit comprises an evaporator, and an inlet of the evaporator is connected with an output pipeline of the liquid storage tank outside the outdoor.
In one embodiment, a pipeline from the outdoor side to the inlet of the evaporator is provided with a third electromagnetic valve and a second electronic expansion valve.
In one embodiment, the outlet of the evaporator is connected with the inlet pipeline of the gas-liquid separator.
In one embodiment, a second one-way valve is arranged on the outlet pipeline of the evaporator.
Has the advantages that:
1. above-mentioned refrigerating system that can start fast under low temperature environment, the start-up process difference current compressor draws the refrigerant from indoor side. The system is started initially, the refrigerant directly passes through the refrigerant heating device from the condenser to form circulation to the compressor, and the refrigerant does not pass through the indoor side, so that the high pressure of the condensation side can be quickly established.
2. In the process, sufficient gaseous refrigerant at the inlet of the press is ensured by adjusting the heating power of the refrigerant heating device and the opening degree of the electronic expansion valve, the suction pressure of the press is ensured, and low-pressure protection is not generated.
3. The refrigerant rapidly enters the indoor side by utilizing the high pressure established on the outdoor side, and the low pressure on the indoor side is rapidly established, so that the whole system is rapidly started in a low-temperature environment.
Drawings
Fig. 1 is a schematic structural diagram of a refrigeration system according to an embodiment of the present invention.
In the figure: 100. a compressor; 110. a high voltage switch; 120. a first solenoid valve; 130. a condenser; 140. a high pressure sensor; 150. a first check valve; 160. a liquid storage tank; 170. a second solenoid valve; 180. a first electronic expansion valve; 190. a refrigerant heating device; 200. a low pressure sensor; 210. a gas-liquid separator; 220. a third electromagnetic valve; 230. a second electronic expansion valve; 240. an evaporator; 250. a second one-way valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, a refrigeration system capable of being rapidly started in a low temperature environment includes an outdoor unit and an indoor unit. Illustratively, the outdoor unit includes a compressor 100, a condenser 130, a liquid reservoir 160, and a refrigerant heating device 190.
The inlet of the compressor 100 is provided with a gas-liquid separator 210, the outlet of the compressor 100 is connected with the inlet of the condenser 130, the exhaust pipe of the compressor 100 is further connected with the inlet end pipeline of the liquid storage tank 160 through a bypass pipe, the exhaust pipe is provided with a high-pressure switch 110, and the bypass pipe is provided with a first electromagnetic valve 120.
The outlet of the condenser 130 is connected with the inlet of the liquid storage tank 160, and the outlet pipeline is also provided with a high-pressure sensor 140 and a first one-way valve 150;
an outlet of the liquid storage tank 160 is connected with a refrigerant heating device 190 through a second solenoid valve 170 and a first electronic expansion valve 180, and an outlet of the refrigerant heating device 190 is connected with an inlet pipeline of a gas-liquid separator 210.
The inlet line of the gas-liquid separator 210 is provided with a low pressure sensor 200.
The indoor unit includes an evaporator 240. Illustratively, the inlet line of the evaporator 240 is in communication with the outlet line of the reservoir 160. And a third solenoid valve 220 and a second electronic expansion valve 230 are provided on the pipe.
The output end of the evaporator 240 is communicated with the compressor 100, and the pipeline of the output end of the evaporator 240 is provided with a second check valve 250.
The working process of the refrigeration system is as follows: before the system is started, the outdoor temperature is low, so that the refrigerant quantity in the system is mostly concentrated on the outdoor side.
And (3) starting the system, controlling the third electromagnetic valve 220 to be closed, and controlling the second electromagnetic valve 170, the first electromagnetic valve 120, the compressor 100 and the refrigerant heating device 190 to be opened. At this time, the condenser 130, the accumulator 160, the first electronic expansion valve 180, the refrigerant heating device 190, the gas-liquid separator 210 and the compressor 100 are in a closed-loop circulation state.
The compressor 100 extracts the refrigerant in the liquid storage tank 160, and after the refrigerant is throttled by the first electronic expansion valve 180 and heated by the refrigerant heating device 190, a large amount of gaseous refrigerant is generated, and at this time, the compressor 100 does not have low-pressure protection. Meanwhile, the bypass pipeline of the compressor exhaust pipe enables part of exhaust gas to supplement the suction gas of the compressor through the liquid pipe, and the suction pressure of the compressor 100 is ensured.
The first solenoid valve 120 is then closed and the pressure in the condenser 130 will build up rapidly. In this process, the opening degree of the first electronic expansion valve 180 and the heating power of the refrigerant heating device 190 are controlled by the low pressure sensor 200, so that the suction pressure value and the superheat degree of the compressor 100 are always maintained in a proper range, and meanwhile, the redundant refrigerant outside the room enters the liquid storage tank 160 for storage.
When the high-side pressure reaches an appropriate value, the third solenoid valve 220 may be opened and the opening degree of the second electronic expansion valve 230 may be gradually increased. Meanwhile, the first electronic expansion valve 180 is appropriately closed and the first solenoid valve 120 is opened. At this time, a large pressure difference may exist between the outdoor unit and the indoor unit, so that the refrigerant rapidly enters the indoor unit, and then the first electronic expansion valve 180, the first solenoid valve 120, and the second solenoid valve 170 are closed, and finally, it is known that a normal low pressure is established in the indoor side through the low pressure sensor 200. At this time, the entire system starts normally.
In fact, the outdoor pressure and the indoor pressure of the system are established in a very short time, the compressor cannot generate low-pressure protection, and the whole starting process of the system is rapid and reliable.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. The utility model provides a but refrigerating system of quick start under low temperature environment which characterized in that: the outdoor unit comprises a compressor, a condenser, a liquid storage tank and a refrigerant heating device; the inlet of the compressor is provided with a gas-liquid separator, the outlet of the compressor is connected with the inlet of the condenser, the exhaust pipe of the compressor is also connected with the inlet end pipeline of the liquid storage tank through a bypass pipe, and the bypass pipe is provided with a first electromagnetic valve; the outlet of the condenser is connected with the inlet of the liquid storage tank, and the outlet pipeline is also provided with a high-pressure sensor and a first one-way valve; the outlet of the liquid storage tank is connected with a refrigerant heating device through a group of pipelines, a second electromagnetic valve and a first electronic expansion valve are arranged on the pipelines, and the outlet of the refrigerant heating device is connected with the inlet pipeline of the gas-liquid separator; and the inlet pipeline of the gas-liquid separator is provided with a low-pressure sensor.
2. The refrigeration system capable of being started rapidly in a low-temperature environment according to claim 1, wherein: the refrigerant heating device is formed by winding an electric heating wire outside a refrigerant pipeline, and wrapping a heat-insulating foaming material layer on the periphery of the refrigerant pipeline.
3. A refrigeration system capable of being started rapidly in a low-temperature environment according to claim 2, wherein: the heating power of the refrigerant heating device can be controlled according to the pressure of the low-pressure sensor.
4. The refrigeration system capable of being started rapidly in a low-temperature environment according to claim 1, wherein: and the air suction pipe and the air exhaust pipe of the compressor are respectively provided with a group of temperature sensors.
5. The refrigeration system capable of being started quickly in a low-temperature environment according to claim 4, wherein: the indoor unit comprises an evaporator, and an inlet of the evaporator is connected with an output pipeline of the liquid storage tank.
6. The refrigeration system capable of being started quickly in a low-temperature environment according to claim 5, wherein: and a third electromagnetic valve and a second electronic expansion valve are arranged on a pipeline from the outdoor side to the inlet of the evaporator.
7. The refrigeration system capable of being started quickly in a low-temperature environment according to claim 6, wherein: and the outlet of the evaporator is connected with the inlet pipeline of the gas-liquid separator.
8. The refrigeration system capable of being started rapidly in a low-temperature environment according to claim 7, wherein: and a second one-way valve is arranged on an outlet pipeline of the evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121612269.7U CN214841801U (en) | 2021-07-15 | 2021-07-15 | Refrigerating system capable of being started quickly in low-temperature environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121612269.7U CN214841801U (en) | 2021-07-15 | 2021-07-15 | Refrigerating system capable of being started quickly in low-temperature environment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353394A (en) * | 2022-01-04 | 2022-04-15 | 烽火通信科技股份有限公司 | Low-temperature starting control method, device and equipment for machine room air conditioner and storage medium |
| CN114593465A (en) * | 2022-01-10 | 2022-06-07 | 西安四腾环境科技有限公司 | Air conditioning unit capable of rapidly heating and cooling under low-temperature working condition and control method |
| CN115143655A (en) * | 2022-06-20 | 2022-10-04 | 青岛海信日立空调系统有限公司 | Evaporation condensation magnetic suspension refrigerating unit |
-
2021
- 2021-07-15 CN CN202121612269.7U patent/CN214841801U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353394A (en) * | 2022-01-04 | 2022-04-15 | 烽火通信科技股份有限公司 | Low-temperature starting control method, device and equipment for machine room air conditioner and storage medium |
| CN114353394B (en) * | 2022-01-04 | 2023-12-22 | 烽火通信科技股份有限公司 | Low-temperature starting control method, device and equipment for machine room air conditioner and storage medium |
| CN114593465A (en) * | 2022-01-10 | 2022-06-07 | 西安四腾环境科技有限公司 | Air conditioning unit capable of rapidly heating and cooling under low-temperature working condition and control method |
| CN114593465B (en) * | 2022-01-10 | 2023-12-15 | 西安四腾环境科技有限公司 | Rapid temperature rise and fall air conditioning unit under low-temperature working condition and control method |
| CN115143655A (en) * | 2022-06-20 | 2022-10-04 | 青岛海信日立空调系统有限公司 | Evaporation condensation magnetic suspension refrigerating unit |
| CN115143655B (en) * | 2022-06-20 | 2023-05-23 | 青岛海信日立空调系统有限公司 | Evaporation condensation magnetic suspension refrigerating unit |
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