CN205784049U - A kind of Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration - Google Patents
A kind of Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration Download PDFInfo
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- CN205784049U CN205784049U CN201620478826.3U CN201620478826U CN205784049U CN 205784049 U CN205784049 U CN 205784049U CN 201620478826 U CN201620478826 U CN 201620478826U CN 205784049 U CN205784049 U CN 205784049U
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- cold
- heat exchanger
- bypass line
- refrigeration
- liquid refrigerant
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Abstract
This utility model provides a kind of Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration, is specifically related to field of refrigeration.The purpose of this utility model is to provide and is capable of quick temperature control, reduction compressor liquid hammer risk, improves refrigerating efficiency, a kind of Liquid refrigerant by-pass cold recovery folding type cooling system under cooling load changes greatly operating mode of reduction refrigeration loss.Described refrigeration system includes condenser/evaporator, low temperature throttle mechanism, high temperature throttle mechanism, vaporizer, condenser, cryogenic compressor, high temperature compressor, cold-storage tank, bypass pipe, heat exchanger, the outlet of described condenser/evaporator is divided into two-way, one tunnel is low temperature throttle mechanism and vaporizer, one tunnel is bypass line, throttle mechanism and electromagnetic valve are also installed on bypass line, cold-producing medium synthesizes a road after this two-way, and be connected with heat exchanger entrance, described heat exchanger exit is connected by pipeline with cryogenic compressor entrance, and heat exchanger is connected by pipeline with cold-storage tank.When worst cold case, bypass line closed electromagnetic valve, unit is in the cooling load state of maximum；Then opening bypass line electromagnetic valve when worst hot case makes the cold-producing medium of low-temperature level produce bypass, i.e. some refrigerant after throttling is introduced directly in the muffler of vaporizer, mix with the return-air of vaporizer, entering low-temperature level compressor after heat exchanger, unnecessary cold is recovered in cold-storage tank by heat exchanger.
Description
Technical field
This utility model provides a kind of Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration, it is possible to
Realize quick temperature control, reduction compressor liquid hammer risk, and unnecessary cold can be reclaimed.
Background technology
Cascade refrigeration machine is generally made up of two single refrigeration systems, is called high temperature subsystem and low temperature subsystem
System part.High temperature subsystem partitions uses middle temperature cold-producing medium, and low temperature subsystem partitions uses low-temperature refrigerant.High temperature subsystem portion
In subsystem, the evaporation of cold-producing medium is used to make cold-producing medium condensation in low temperature subsystem partitions system, will with a condenser/evaporator
Two parts connect, and it is the vaporizer of high temperature subsystem partitions, are again the condensers of low temperature subsystem partitions.
At petrochemical industry, during petroleum vapor recovery, cooling load changes greatly, and uses Ordinary Compression chance frequent start-stop, holds
It is easily caused mechanical disorder, uses frequency-changeable compressor then can increase equipment cost.
Summary of the invention
The deficiency existed for prior art, the purpose of this utility model is to provide the liquid for two-stage cascade refrigeration
Body bypass cold recovery refrigeration system.This system increases a refrigerant bypass in the low-temperature level of two-stage folding type cooling system
Road, and by unnecessary cold cold-storage tank reclaim, to realize quick temperature control, reduction compressor liquid hammer risk, and improve refrigerating efficiency,
Reduce refrigeration loss.
This utility model for achieving the above object, adopts the following technical scheme that
A kind of Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration, it is characterised in that steam in condensation
Sending out and be provided with refrigerant bypass line between device and heat exchanger, described bypass line is in parallel closing with cryogenic vaporizer place pipeline
System；Described bypass line is provided with electromagnetic valve and throttle mechanism, and described bypass line throttle mechanism is electric expansion valve；Described side
Logical line entry is connected with the outlet of described condenser/evaporator, and the outlet of described bypass line is connected with described heat exchanger entrance.
The electromagnetic valve opening and closing of described bypass line is controlled by described evaporator outlet temperature, when described evaporator outlet temperature
During less than setting value, described electromagnetic valve is opened.
Described cryogenic vaporizer place pipe throttle mechanism is electric expansion valve.
Described heat exchanger is connected by pipeline with cold-storage tank, and described heat exchanger guarantee system is when oepration at full load,
Overheat of compressor degree is in the reasonable scope.
Compared with general two-stage folding type cooling system, advantage of the present utility model is when cooling load changes greatly,
The cold-producing medium by vaporizer can be reduced, it is achieved quickly temperature control, reduction compressor liquid hammer by opening bypass line electromagnetic valve
Risk, and improve refrigerating efficiency, reduce refrigeration loss.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described in further detail.
The Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration as shown in Figure 1, including condenser 1,
Electric expansion valve 2, high temperature compressor 3, condenser/evaporator 4, cryogenic compressor 5, electromagnetic valve 6, electric expansion valve 7, electronic expansion
Valve 8, vaporizer 9, heat exchanger 10, cold-storage tank 11.
This utility model Liquid refrigerant by-pass two-stage folding type cooling system is provided with system between condenser/evaporator and heat exchanger
Refrigerant by pass tube road, the outlet of described condenser/evaporator is divided into two-way, and a road is low temperature throttle mechanism and vaporizer, and a road is bypass
Pipeline, bypass line is provided with throttle mechanism and electromagnetic valve, and cold-producing medium synthesizes a road after this two-way, and enters with heat exchanger
Mouth connects, and described heat exchanger exit is connected by pipeline with cryogenic compressor entrance, and heat exchanger is connected by pipeline with cold-storage tank.
When worst cold case, bypass line closed electromagnetic valve, unit is in the cooling load state of maximum；Then open when worst hot case
Bypass line electromagnetic valve makes the cold-producing medium of low-temperature level produce bypass, i.e. some refrigerant after throttling and is introduced directly into vaporizer
Muffler in, mix with the return-air of vaporizer, after heat exchanger enter low-temperature level compressor, unnecessary cold passes through heat exchange
Device is recovered in cold-storage tank.
This utility model is compared with general two-stage folding type cooling system, and advantage is when cooling load changes greatly, can
With by opening bypass line electromagnetic valve, reduce by the cold-producing medium of vaporizer, it is achieved quickly temperature control, avoid high frequent to open
Stop, reduce compressor liquid hammer risk, and improve refrigerating efficiency, reduce refrigeration loss.
Claims (6)
1. the Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration, it is characterised in that at condensation evaporation
Being provided with refrigerant bypass line between device and heat exchanger, described bypass line is in parallel closing with cryogenic vaporizer place pipeline
System；Described bypass line entrance is connected with the outlet of described condenser/evaporator, the outlet of described bypass line and described heat exchanger entrance
Connect.
Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration the most according to claim 1, its feature
It is: described bypass line is provided with electromagnetic valve and throttle mechanism.
Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration the most according to claim 2, its feature
It is: described bypass line throttle mechanism is electric expansion valve.
Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration the most according to claim 2, its feature
It is: the electromagnetic valve opening and closing of described bypass line is controlled by described evaporator outlet temperature, when described evaporator outlet temperature is low
When setting value, described electromagnetic valve is opened.
Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration the most according to claim 1, its feature
It is: described cryogenic vaporizer place pipe throttle mechanism is electric expansion valve.
Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration the most according to claim 1, its feature
It is: described heat exchanger is connected by pipeline with cold-storage tank, and described heat exchanger ensures that system, when oepration at full load, is compressed
The machine degree of superheat is in the reasonable scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620478826.3U CN205784049U (en) | 2016-05-20 | 2016-05-20 | A kind of Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620478826.3U CN205784049U (en) | 2016-05-20 | 2016-05-20 | A kind of Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205784049U true CN205784049U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620478826.3U Expired - Fee Related CN205784049U (en) | 2016-05-20 | 2016-05-20 | A kind of Liquid refrigerant by-pass cold recovery refrigeration system for two-stage cascade refrigeration |
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| CN (1) | CN205784049U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120916A (en) * | 2017-05-08 | 2017-09-01 | 上海理工大学 | Superposition type dual temperature drying system |
| CN107131594A (en) * | 2017-04-18 | 2017-09-05 | 海南佩尔优科技有限公司 | A kind of water energy-storage system and its control method |
| CN108507216A (en) * | 2018-03-27 | 2018-09-07 | 成都朗博旺科技发展有限公司 | A kind of superelevation grain depot cold recovery equipment and with the grain storage system of the equipment |
| CN111238072A (en) * | 2020-01-14 | 2020-06-05 | 西安交通大学 | Energy-saving refrigeration system capable of realizing refrigerant switching and working method thereof |
| CN112594967A (en) * | 2020-12-25 | 2021-04-02 | 珠海格力电器股份有限公司 | Composite refrigeration system and control method thereof |
| CN114396734A (en) * | 2022-01-07 | 2022-04-26 | 北京京仪自动化装备技术股份有限公司 | Control method of temperature control system and temperature control system |
| CN114992892A (en) * | 2022-05-25 | 2022-09-02 | 青岛海尔空调电子有限公司 | Cascade heat pump system and control method thereof |
| CN115164432A (en) * | 2022-06-27 | 2022-10-11 | 青岛海尔空调电子有限公司 | Heat pump system and control method thereof |
| CN115289705A (en) * | 2022-06-23 | 2022-11-04 | 北京京仪自动化装备技术股份有限公司 | Temperature control system and temperature control method |
| CN115289704A (en) * | 2022-06-23 | 2022-11-04 | 北京京仪自动化装备技术股份有限公司 | Temperature control device and temperature control method |
-
2016
- 2016-05-20 CN CN201620478826.3U patent/CN205784049U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131594A (en) * | 2017-04-18 | 2017-09-05 | 海南佩尔优科技有限公司 | A kind of water energy-storage system and its control method |
| CN107120916A (en) * | 2017-05-08 | 2017-09-01 | 上海理工大学 | Superposition type dual temperature drying system |
| CN108507216B (en) * | 2018-03-27 | 2023-08-22 | 成都朗博旺科技发展有限公司 | Cold recovery equipment for ultrahigh grain depot and grain storage system with same |
| CN108507216A (en) * | 2018-03-27 | 2018-09-07 | 成都朗博旺科技发展有限公司 | A kind of superelevation grain depot cold recovery equipment and with the grain storage system of the equipment |
| CN111238072A (en) * | 2020-01-14 | 2020-06-05 | 西安交通大学 | Energy-saving refrigeration system capable of realizing refrigerant switching and working method thereof |
| CN111238072B (en) * | 2020-01-14 | 2021-03-26 | 西安交通大学 | Energy-saving refrigeration system capable of realizing refrigerant switching and working method thereof |
| CN112594967A (en) * | 2020-12-25 | 2021-04-02 | 珠海格力电器股份有限公司 | Composite refrigeration system and control method thereof |
| CN112594967B (en) * | 2020-12-25 | 2024-05-03 | 珠海格力电器股份有限公司 | Composite refrigeration system and control method thereof |
| CN114396734A (en) * | 2022-01-07 | 2022-04-26 | 北京京仪自动化装备技术股份有限公司 | Control method of temperature control system and temperature control system |
| CN114396734B (en) * | 2022-01-07 | 2024-03-15 | 北京京仪自动化装备技术股份有限公司 | Control method of temperature control system and temperature control system |
| CN114992892A (en) * | 2022-05-25 | 2022-09-02 | 青岛海尔空调电子有限公司 | Cascade heat pump system and control method thereof |
| CN115289704B (en) * | 2022-06-23 | 2023-10-13 | 北京京仪自动化装备技术股份有限公司 | Temperature control device and temperature control method |
| CN115289704A (en) * | 2022-06-23 | 2022-11-04 | 北京京仪自动化装备技术股份有限公司 | Temperature control device and temperature control method |
| CN115289705B (en) * | 2022-06-23 | 2024-03-15 | 北京京仪自动化装备技术股份有限公司 | Temperature control system and temperature control method |
| CN115289705A (en) * | 2022-06-23 | 2022-11-04 | 北京京仪自动化装备技术股份有限公司 | Temperature control system and temperature control method |
| CN115164432A (en) * | 2022-06-27 | 2022-10-11 | 青岛海尔空调电子有限公司 | Heat pump system and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20210520 |