CN207438936U - A kind of two-way bypasses three-level auto-cascading refrigeration system - Google Patents
A kind of two-way bypasses three-level auto-cascading refrigeration system Download PDFInfo
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- CN207438936U CN207438936U CN201720912356.1U CN201720912356U CN207438936U CN 207438936 U CN207438936 U CN 207438936U CN 201720912356 U CN201720912356 U CN 201720912356U CN 207438936 U CN207438936 U CN 207438936U
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Abstract
The utility model provides a kind of two-way bypass three-level auto-cascading refrigeration system, and in particular to field of refrigeration.The purpose of this utility model be to provide it is a kind of can by delivery temperature and pressure control in safe range, the two-way accelerating cooling rate, improve system stability and refrigeration performance bypass three-level auto-cascading refrigeration system.The auto-cascading refrigeration system includes compressor, expansion vessel, condenser, gas-liquid separator, condenser/evaporator, electric expansion valve, solenoid valve, evaporator, the two-way bypass system is connected respectively from the gas vent of gas-liquid separator with expansion vessel, respectively the opening and closing with solenoid valve control bypass line and uninterrupted.When low temperature refrigerant gas pressure is excessive in gas-liquid separator top, automatically open solenoid valve, the pressure at expulsion of system is controlled in certain safe and effective scope by the uninterrupted for adjusting two-way bypass line, can effective control system pressure at expulsion and delivery temperature, and the incoagulable gas in the timely removal system of energy, accelerate rate of temperature fall, improve system energy efficiency.
Description
Technical field
The utility model provides a kind of two-way bypass three-level auto-cascading refrigeration system, can be by delivery temperature and pressure control
System is in safe range, quickening cooling rate, raising three-level auto-cascading refrigeration system stability, and in particular to refrigeration system is led
Domain.
Background technology
Cascade refrigeration machine is usually made of two individual refrigeration systems, is referred to as high temperature subsystem and low temperature subsystem
System part.High temperature subsystem partitions use medium temperature refrigerant, and low temperature subsystem partitions use low-temperature refrigerant.High temperature subsystem portion
The evaporation of refrigerant is for condensing refrigerant in low temperature subsystem partitions system, being incited somebody to action with a condenser/evaporator in subsystem
Two parts connect, it is both the evaporator of high temperature subsystem partitions and the condenser of low temperature subsystem partitions.
Automatic cascade refrigeration realizes multistage cascade refrigeration using mixed working fluid by single compressor, can make -60 DEG C
Following low temperature has great advantage in small-sized field of low-temperature refrigeration tool.Compared with multi-stage compression and classical cascade refrigeration Xun Huan, letter
Change system, many low temperature requirements can be met, at the same it is again simple and reliable.It produces -50 DEG C or so warm areas and two-stage may be employed
Three-level automatic cascade refrigeration system may be employed in automatic cascade refrigeration system, -100 DEG C or so warm areas.
It is used non-common when required cryogenic temperature is relatively low or during runback iterated series increase in auto-cascading refrigeration system
Boiling mix refrigerant becomes more complicated, and causes delivery temperature and the pressure rise of system, and security of system declines；And due to not
The presence of solidifying property gas so that cooling rate declines, auto-cascading refrigeration system reduced performance.
The content of the invention
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of two-way to bypass three-level Auto-cascade cycle
Refrigeration system.The system sets two-way two-way bypass line on the basis of three-level auto-cascading refrigeration system.
The utility model to achieve the above object, adopts the following technical scheme that：
A kind of two-way bypasses three-level auto-cascading refrigeration system, which is characterized in that is provided with condensed in two stages evaporator and two-stage
Gas-liquid separator is provided with expansion vessel before condenser, for being discharged into incoagulable gas to reduce system pressure.In two-stage gas
The gas vent of liquid/gas separator upper end is connected to form two-way bypass line with expansion vessel respectively.
The two-way bypass line is provided with solenoid valve, and the solenoid valve can control opening and closing and the gas stream of corresponding pipeline
Amount.
The solenoid valve of the two-way bypass line is opened and closed corresponds to gas-liquid separator head gas pressure with flow by place pipeline
Power controls, and when gas pressure is excessive, solenoid valve automatically opens incoagulable gas being discharged into is discharged into expansion capacity by bypass line
Device, so as to control the pressure at expulsion of system in certain safe and effective scope.
The two-way two-way bypass line synthesizes all the way before expansion vessel is entered, and is opened and closed by a main valve control,
The main valve is solenoid valve.
The refrigeration working medium that the refrigeration system uses select R134a, R23, R14 according to 60%, 20%, 20% mixing ratio
Example composition mixed non-azeotropic refrigerant.
Compared with general three-level auto-cascading refrigeration system, the advantage of the utility model is, when system exhaust temperature and pressure
When power is excessively high, can incoagulable gas be directly discharged by expansion vessel by two-way bypass line, to reduce rapidly delivery temperature
With pressure, quickening cooling rate, lifting system stability and performance.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1 bypasses three-level auto-cascading refrigeration system for two-way, including component：Compressor (1), oil eliminator
(2), solenoid valve a (3), solenoid valve b (4), expansion vessel (5), condenser (6), solenoid valve c (7), device for drying and filtering (8), gas-liquid
It is separator a (9), electric expansion valve a (10), condenser/evaporator a (11), gas-liquid separator b (12), electric expansion valve b (13), cold
Solidifying evaporator b (14), evaporator (15), electric expansion valve c (16).
A kind of two-way bypass three-level auto-cascading refrigeration system of this practicality is provided with condensed in two stages evaporator and two-stage gas-liquid point
Expansion vessel is provided with from device, before condenser, for being discharged into incoagulable gas to reduce system pressure.In two-stage gas-liquid separation
The gas vent of device upper end is connected to form two-way bypass line with expansion vessel respectively, and two-way bypass line sets electromagnetism respectively
Valve control piper is opened and closed and flow.The two-way two-way bypass line synthesizes all the way before expansion vessel is entered, and by one
Main valve control opening and closing, the main valve are solenoid valve.When gas-liquid separator head gas pressure is excessive, solenoid valve automatically open by
Incoagulable gas is discharged into is discharged into expansion vessel by bypass line, to reduce rapidly delivery temperature and pressure, accelerate cooling rate.
Compared with general three-level auto-cascading refrigeration system, advantage is to have added two-way two-way bypass line the utility model
Afterwards, incoagulable gas can be discharged into expansion vessel by system in time so that the pressure at expulsion and delivery temperature of system can be rapid
Control enhances the security and stability of refrigeration system in safe range；Meanwhile refrigeration cool-down rate also has promotion, system
Overall security and refrigeration performance have a distinct increment.
Claims (6)
1. a kind of two-way bypasses three-level auto-cascading refrigeration system, it is characterised in that：It is provided with condensed in two stages evaporator and two-stage gas
Liquid/gas separator is provided with expansion vessel before condenser, for being discharged into incoagulable gas to reduce system pressure, described one kind
The component that two-way bypass three-level auto-cascading refrigeration system includes has：Compressor (1), oil eliminator (2), solenoid valve a (3), electromagnetism
Valve b (4), expansion vessel (5), condenser (6), solenoid valve c (7), device for drying and filtering (8), gas-liquid separator a (9), electronic expansion
Valve a (10), condenser/evaporator a (11), gas-liquid separator b (12), electric expansion valve b (13), condenser/evaporator b (14), evaporation
It is device (15), electric expansion valve c (16), wherein component compresses machine (1), oil eliminator (2), expansion vessel (5), condenser (6), dry
Dry filter (8), gas-liquid separator a (9), electric expansion valve a (10) and condenser/evaporator a (11) form a Xun Huan.
2. a kind of two-way bypass three-level auto-cascading refrigeration system according to claim 1, it is characterised in that：In two-stage gas-liquid
The gas vent of separator upper end is connected to form two-way bypass line with expansion vessel respectively.
3. a kind of two-way bypass three-level auto-cascading refrigeration system according to claim 2, it is characterised in that：Two roadside
Siphunculus road is provided with solenoid valve, and the solenoid valve can control opening and closing and the gas flow of corresponding pipeline.
4. a kind of two-way bypass three-level auto-cascading refrigeration system according to claim 1, it is characterised in that：Two roadside
The solenoid valve opening and closing on siphunculus road corresponds to the control of gas-liquid separator head gas pressure with flow by place pipeline, when gas pressure mistake
When big, solenoid valve automatically opens incoagulable gas being discharged into is discharged into expansion vessel by bypass line, by the pressure at expulsion of system
Control is in certain safe and effective scope.
5. a kind of two-way bypass three-level auto-cascading refrigeration system according to claim 1, it is characterised in that：The two-way two
Road bypass line synthesizes all the way before expansion vessel is entered, and by a main valve control opening and closing, the main valve is solenoid valve.
6. a kind of two-way bypass three-level auto-cascading refrigeration system according to claim 1, it is characterised in that：The refrigeration system
The refrigeration working medium that system uses selects R134a, R23, R14 to mix system according to 60%, 20%, 20% mixed proportion composition non-azeotrope
Cryogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720912356.1U CN207438936U (en) | 2017-07-20 | 2017-07-20 | A kind of two-way bypasses three-level auto-cascading refrigeration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720912356.1U CN207438936U (en) | 2017-07-20 | 2017-07-20 | A kind of two-way bypasses three-level auto-cascading refrigeration system |
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| CN207438936U true CN207438936U (en) | 2018-06-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737624A (en) * | 2018-12-28 | 2019-05-10 | 西安交通大学 | A kind of dual temperature refrigeration system and its control method |
| CN114034160A (en) * | 2021-12-14 | 2022-02-11 | 郑州大学 | Novel two-stage rectification self-cascade natural gas liquefaction system and control method thereof |
-
2017
- 2017-07-20 CN CN201720912356.1U patent/CN207438936U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737624A (en) * | 2018-12-28 | 2019-05-10 | 西安交通大学 | A kind of dual temperature refrigeration system and its control method |
| CN114034160A (en) * | 2021-12-14 | 2022-02-11 | 郑州大学 | Novel two-stage rectification self-cascade natural gas liquefaction system and control method thereof |
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