CN209355535U - A kind of refrigerating type low-temperature circulating device - Google Patents
A kind of refrigerating type low-temperature circulating device Download PDFInfo
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- CN209355535U CN209355535U CN201822069096.3U CN201822069096U CN209355535U CN 209355535 U CN209355535 U CN 209355535U CN 201822069096 U CN201822069096 U CN 201822069096U CN 209355535 U CN209355535 U CN 209355535U
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Abstract
The utility model discloses a kind of refrigerating type low-temperature circulating devices, including high temperature circulation subelement, low-temperature circulating subelement, the Intermediate Heat Exchanger for mutually bridging high temperature circulation subelement with low-temperature circulating subelement；The high temperature circulation subelement includes high-temperature level compressor, first order heat exchanger, first order heat exchanger, the first nuclear one-stage throttling device；The low-temperature circulating subelement includes evaporator, low-temperature level compressor, the second nuclear one-stage throttling device, regenerator.The utility model energy-saving and environmental protection, efficiently.
Description
Technical field
The utility model relates to refrigeration technology fields, and in particular to a kind of refrigerating type low-temperature circulating of superposition type compression refrigeration
Device.
Background technique
In industrial production, low temperature is obtained using the multi-stage compression refrigeration cycle of unitary system cryogen, suffers from evaporating pressure
Too low or refrigerant solidification limitation leads to that lower temperature cannot be produced.Such as: in t0At=- 80 DEG C, the vapor pres- sure of R22
Power is in 10kPa or less；Ammonia is solidified as solid-state at -77.7 DEG C.
When evaporating pressure is too low, is far below standard atmospheric pressure, on the one hand, a possibility that penetrating into air in refrigeration system increases
Add；On the other hand, the vapor ratio volume in refrigeration system will increase, and gas transmission coefficient can also reduce, and cause to produce identical refrigerating capacity
When, the compresser cylinder size needed increases.And if refrigerant uses cryogenic fluid, condensing pressure can be excessively high, close to critical
State causes restriction loss to increase, and when degree of supercooling is constant, the specific refrigerating effect of refrigeration system can be reduced.
Superposition type compresses refrigeration cycle, is made of two or more independent refrigeration cycle, is referred to as high temperature and follows
Ring and low-temperature circulating.In each individual refrigeration system, using different refrigerants, and the property of refrigerant is also different.One
As in the case of, the refrigerant used in high temperature circulation is high temperature refrigerant；The refrigerant used in low-temperature circulating is low temperature system
Cryogen.Superposition type compresses high temperature circulation and low-temperature circulating in refrigeration cycle, and single-stage or two-stage compression refrigeration circulation can be used.
High temperature circulation is connected with low-temperature circulating by a condenser/evaporator.Condenser/evaporator is both the evaporator of high temperature circulation,
It is also the condenser of low-temperature circulating.That is the heat that refrigerant evaporation absorbs in high-temperature refrigeration circulation, in cryogenic refrigeration circulation
The heat of refrigerant condensation release.In this way, the heat (refrigerating capacity) that low-temperature circulating absorbs is transmitted to high temperature by condenser/evaporator
The refrigerant of circulation, the refrigerant of high temperature circulation transfer heat to surrounding medium (air or water) again.
Superposition type compresses refrigeration cycle, can solve and obtains low temperature using the multi-stage compression refrigeration cycle of unitary system cryogen
When, by evaporating pressure it is too low or refrigerant solidification is limited.Because each alone cycle uses refrigerant of different nature,
It both can satisfy suitable evaporating pressure under lower evaporating temperature, also can satisfy at ambient temperature have it is moderate
Condensing pressure.
In conclusion the cascade refrigeration of two or more working medium can be used to obtain lower evaporating temperature
Circulation.
Summary of the invention
In view of the above-mentioned defects in the prior art, the refrigerating type low temperature that the utility model provides a kind of superposition type compression refrigeration follows
Loop device, energy-saving and environmental protection, efficiently.
To achieve the above object, technical solution adopted in the utility model is:
A kind of refrigerating type low-temperature circulating device, including high temperature circulation subelement, low-temperature circulating subelement, by high temperature circulation son
The Intermediate Heat Exchanger that unit is mutually bridged with low-temperature circulating subelement；
The high temperature circulation subelement includes high-temperature level compressor, first order heat exchanger, first order heat exchanger, the first order
Throttling set；The high temperature and pressure import connection first order heat exchanger of the first order heat exchanger is simultaneously connected by first order heat exchanger
The high temperature and pressure outlet of high-temperature level compressor is connect, the first nuclear one-stage throttling device of high temperature and pressure outlet of first order heat exchanger is simultaneously
By being connected to the low-temp low-pressure import of Intermediate Heat Exchanger after the first nuclear one-stage throttling device reducing pressure by regulating flow, the low temperature of the Intermediate Heat Exchanger is low
The low-temp low-pressure inlet communication of mouth and first order heat exchanger is extruded, and high-temperature level compression is flowed back by first order heat exchanger
On machine, high temperature circulation channel is formed；
The low-temperature circulating subelement includes evaporator, low-temperature level compressor, the second nuclear one-stage throttling device, regenerator；It is described
The low-temp low-pressure import of the low-temp low-pressure outlet connection regenerator of evaporator simultaneously connects low-temperature level compressor by regenerator；It is described
The high temperature and pressure import of regenerator connects low-temperature level compressor, and the second nuclear one-stage throttling device of high temperature and pressure outlet connection of regenerator is simultaneously
In the low-temp low-pressure import for connecting evaporator after the second nuclear one-stage throttling device reducing pressure by regulating flow, low-temperature circulating channel is formed.
As improvement to above-mentioned technical proposal, the low-temperature circulating subelement further includes expansion vessel, the expansion capacity
The front end of device is connected in the communicating passage of regenerator and low-temperature level compressor, and rear end is connected to low-temperature level compressor and centre is changed
In the communicating passage of hot device.
As improvement to above-mentioned technical proposal, the front passage of the expansion vessel is provided with check valve, the expansion
The rear end channel of container is provided with pressure-control valve.
As improvement to above-mentioned technical proposal, the first order heat exchanger is micro-channel heat exchanger, the first order heat
Exchanger is gas-liquid heat exchanger, and the Intermediate Heat Exchanger is plate heat exchanger.
As improvement to above-mentioned technical proposal, what is be added in the circulation canal of the high temperature circulation subelement is high temperature
Refrigerant, what is be added in the circulation canal of the low-temperature circulating subelement is low-temperature refrigerant.
As improvement to above-mentioned technical proposal, the high temperature refrigerant is R600a, and the low-temperature refrigerant is R23.
As improvement to above-mentioned technical proposal, the evaporator is externally connected with refrigerating channel, and the refrigerating channel is by refrigerating
Agent E conveys refrigerating capacity.
Compared with prior art, beneficial effect acquired by the utility model is:
The refrigerating type low-temperature circulating device of the utility model, using the evaporation of the high temperature refrigerant in high temperature circulation come cold
Low-temperature refrigerant in solidifying low-temperature circulating, i.e., the heat (refrigerating capacity) that low-temperature refrigerant absorbs in low-temperature circulating pass to high temperature and follow
High temperature refrigerant in ring, so that the low-temperature refrigerant in low-temperature circulating be made to obtain lower evaporating temperature.Meanwhile high temperature follows
Condenser in ring uses micro-channel heat exchanger, improves heat exchange efficiency, obtains the high temperature refrigerant in high temperature circulation more
Low evaporating temperature, by plate heat exchanger (condenser/evaporator), so that it is lower to obtain the low-temperature refrigerant in low-temperature circulating
Evaporating temperature；Condenser/evaporator uses plate heat exchanger, and high temperature circulation and low-temperature circulating are connected, and improves heat exchange effect
Rate；When high temperature circulation is connected with the equipment in low-temperature circulating with pipeline, using quick coupling, convenient for system installation, disassembly and dimension
Shield.Therefore, novel refrigerating type low-temperature circulating system described in the utility model is a kind of energy-saving and environmental protection, efficient low-temperature circulating
Device.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the utility model；
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, any modification, equivalent replacement, improvement and so on should be included in the utility model
Within protection scope.
As shown in Figure 1, the refrigerating type low-temperature circulating device of the utility model, including high temperature circulation and low-temperature circulating.High temperature
Capital equipment in circulation includes: high-temperature level compressor, micro-channel heat exchanger (first order heat exchanger), gas-liquid heat exchanger (
Level-one heat exchanger), throttling set (the first nuclear one-stage throttling device), plate heat exchanger (Intermediate Heat Exchanger), quick coupling；Low temperature follows
Capital equipment in ring includes: low-temperature level compressor, plate heat exchanger (Intermediate Heat Exchanger), regenerator, the throttling set (second level
Throttling set), evaporator, expansion vessel, quick coupling.The capital equipment of high temperature circulation and low-temperature circulating is each by specific tube
Road connection, high temperature circulation and low-temperature circulating are contacted by plate heat exchanger (Intermediate Heat Exchanger is also a kind of condenser/evaporator)
Come.
In conjunction with attached drawing 1 it is found that using R600a with the refrigerant in high temperature circulation, the refrigerant in low-temperature circulating uses R23
For, the utility model is described in further detail.
Fig. 1 is the system principle schematic diagram of the utility model.As shown in Figure 1, high temperature circulation are as follows: 5-5'-6-7-7'-8-5；
Low-temperature circulating are as follows: 1-1'-2-3-3'-4-1.
In practical application, refrigerant R600a in high temperature circulation, evaporation is inhaled in plate heat exchanger C (Intermediate Heat Exchanger)
Heat forms the refrigerant R600a steam of low-temp low-pressure；Low-temperature low-pressure refrigerant R600a steam passes sequentially through quick coupling J8, pipe
Road 5, quick coupling J7, gas-liquid heat exchanger G (first order heat exchanger), into high-temperature refrigeration compressor A1, in high-temperature refrigeration
It is compressed in compressor A1, forms the refrigerant R600a steam of high temperature and pressure；The refrigerant R600a refrigerant of high temperature and pressure
Steam passes sequentially through quick coupling JI, pipeline 6, quick coupling J5, into micro-channel heat exchanger B (first order heat exchanger), condensation
Heat release is undergone phase transition, and forms the refrigerant R600a liquid of high temperature and pressure；The refrigerant R600a liquid of high temperature and pressure successively passes through
Quick coupling J9, pipeline 7, quick coupling J13 carry out heat exchange, release into gas-liquid heat exchanger G (first order heat exchanger)
Thermal discharge forms the refrigerant R600a subcooled liquid of high temperature and pressure；The refrigerant R600a subcooled liquid of high temperature and pressure, successively leads to
Quick coupling J14, pipeline 7 ' are crossed, into throttling set F1 (the first nuclear one-stage throttling device), reducing pressure by regulating flow forms the system of low-temp low-pressure
Cryogen R600a liquid；The refrigerant R600a liquid of low-temp low-pressure is successively through piping 8, quick coupling 17, into plate-type heat-exchange
Device C (Intermediate Heat Exchanger), evaporation endothermic are undergone phase transition, and form the refrigerant R600a steam of low-temp low-pressure, are completed high temperature and are followed
Ring.
In practical application, the refrigerant R23 of low-temperature circulating, in evaporator D, the refrigerant R23 for forming low-temp low-pressure steams
Gas；The refrigerant R23 steam of low-temp low-pressure passes sequentially through quick coupling J12, pipeline 1, quick coupling J11, into regenerator I,
Heat exchange is carried out, heat is absorbed, forms the refrigerant R23 superheated vapor of low-temp low-pressure；The refrigerant R23 of low-temp low-pressure is overheated
Steam passes sequentially through quick coupling J10, pipeline 1 ', meets kinetic head J4 fastly, into cryogenic refrigeration compressor A2, in cryogenic refrigeration pressure
It is compressed in contracting machine A2, forms the refrigerant R23 steam of high temperature and pressure；The refrigerant R23 steam of high temperature and pressure passes sequentially through
Quick coupling J3, pipeline 2, quick coupling J9 condense heat release, undergo phase transition, shape into plate heat exchanger C (Intermediate Heat Exchanger)
At the refrigerant R23 liquid of high temperature and pressure；The refrigerant R23 liquid of high temperature and pressure successively passes through quick coupling J18, pipeline 3, fast
Quick coupling 15, into regenerator I, carry out heat exchange, discharge heat, form the refrigerant R23 subcooled liquid of high temperature and pressure；High temperature
The refrigerant R23 subcooled liquid of high pressure, passes sequentially through quick coupling J16, pipeline 3 ', and into throttling set F2, (second level throttles
Device), reducing pressure by regulating flow forms the refrigerant R23 liquid of low-temp low-pressure；The refrigerant R23 liquid of low-temp low-pressure is successively by pipe
Road 4, quick coupling 19, into evaporator D, evaporation endothermic is undergone phase transition, and forms the refrigerant R23 steam of low-temp low-pressure, low
Temperature circulation.
In practical application, high temperature circulation and low-temperature circulating pass through plate heat exchanger C (Intermediate Heat Exchanger) (condenser/evaporator)
It connects.In plate heat exchanger C (Intermediate Heat Exchanger), the refrigerant R600a liquid of the low-temp low-pressure in high temperature circulation with
The refrigerant R23 refrigerant vapour of high temperature and pressure in low-temperature circulating exchanges heat.The refrigeration of low-temp low-pressure in high temperature circulation
Agent R600a liquid, evaporation endothermic are undergone phase transition, and form the refrigerant R600a steam of low-temp low-pressure；High temperature in low-temperature circulating
The refrigerant R23 refrigerant vapour of high pressure condenses heat release, undergoes phase transition, form the refrigerant R23 liquid of high temperature and pressure.
The utility model is used as condenser/evaporator using plate heat exchanger C (Intermediate Heat Exchanger), changes compared to using tubular type
Hot device has heat exchange efficiency high, and heat loss is small, and device structure is compact, and occupation area of equipment is small, and service life of equipment is grown excellent
Point.
In practical application, the refrigerant R600a high pressure high temperature vapor in high temperature circulation enters micro-channel heat exchanger B (first
Grade heat exchanger), heat release is condensed, undergoes phase transition, forms the refrigerant R600a liquid of high temperature and pressure.Refrigerant R600a is in microchannel
The heat transfer discharged in heat exchanger B (first order heat exchanger) gives surrounding medium air.It, can be micro- logical to enhance heat transfer effect
It installs fan beside road heat exchanger B (first order heat exchanger) additional and heat transfer effect is further strengthened by forced convection heat transfer.
Micro-channel heat exchanger (first order heat exchanger) there is high heat transfer coefficient, refrigerant side and air wide pre. drop to reduce, body
The features such as product is small, anticorrosive, recyclable.
The utility model uses micro-channel heat exchanger B (first order heat exchanger), compared to fin-tube type condenser is used, has
Improve refrigeration system Energy Efficiency Ratio, reduce refrigerant usage amount, reduce refrigeration equipment occupied area, reduce refrigeration equipment weight,
The advantages of reducing refrigeration unit cost.
In practical application, in the gas-liquid heat exchanger G (first order heat exchanger) of high temperature circulation, from micro-channel heat exchanger
The refrigerant R600a liquid of the high temperature and pressure come out in B (first order heat exchanger) goes out with from plate heat exchanger C (Intermediate Heat Exchanger)
The refrigerant R600a steam of the low-temp low-pressure come carries out heat exchange；It is come out from micro-channel heat exchanger B (first order heat exchanger)
The refrigerant R600a liquid of high temperature and pressure discharges heat, forms the refrigerant R600a subcooled liquid of high temperature and pressure；It is changed from board-like
The refrigerant R600a steam for the low-temp low-pressure that hot device C (Intermediate Heat Exchanger) comes out absorbs heat, forms the refrigeration of low-temp low-pressure
Agent R600a superheated vapor；If in the refrigerant R600a steam of the low-temp low-pressure come out from plate heat exchanger C (Intermediate Heat Exchanger)
Refrigerant R600a liquid containing low-temp low-pressure, then after entering gas-liquid heat exchanger G (first order heat exchanger), due to close
Degree is different, and the refrigerant R600a liquid of low-temp low-pressure can be separated from the refrigerant R600a steam of low-temp low-pressure.It is low
The refrigerant R600a liquid accumulation of warm low pressure is to the lower half of gas-liquid heat exchanger G (first order heat exchanger)；Low-temp low-pressure
Refrigerant R600a steam gathers the upper half of gas-liquid heat exchanger G (first order heat exchanger).Gas-liquid heat exchanger G (first
Grade heat exchanger) high temperature and pressure in the pipe of lower half refrigerant R600a liquid and gas-liquid heat exchanger G (first order heat exchange
Device) in low-temp low-pressure refrigerant R600a liquid and low-temp low-pressure refrigerant R600a steam carry out heat exchange, formed it is low
The refrigerant R600a superheated vapor of warm low pressure.
The utility model use gas-liquid heat exchanger G (first order heat exchanger), have separation from plate heat exchanger C (in
Between heat exchanger) the refrigerant R600a liquid of low-temp low-pressure that contains in the refrigerant R600a steam of low-temp low-pressure that comes out, really
The low-temperature low-pressure refrigerant R600a steam of guarantor into high-temperature level compressor A1 are dry flue gas, so that it is guaranteed that high-temperature level compressor A1
The advantages of safe operation；In addition, the utility model uses gas-liquid heat exchanger G (first order heat exchanger), having makes from high temperature
The refrigerant R600a liquid supercooling of the high temperature and pressure come out in micro-channel heat exchanger B (first order heat exchanger) in circulation, is promoted high
The refrigerating capacity of temperature circulation, thus the advantages of lifting system refrigerating capacity.
Height in practical application, in the regenerator I of low-temperature circulating, from plate heat exchanger C (Intermediate Heat Exchanger) out
The refrigerant R23 liquid of warm high pressure and the refrigerant R23 steam of the low-temp low-pressure come out from evaporator D carry out heat exchange.From
The refrigerant R23 liquid of the high temperature and pressure come out in plate heat exchanger C (Intermediate Heat Exchanger) discharges heat, forms high temperature and pressure
Refrigerant R23 subcooled liquid；The refrigerant R23 steam of the low-temp low-pressure come out from evaporator D absorbs heat, is formed low
23 superheated vapor of refrigerant of warm low pressure.
The utility model uses regenerator I, has the high temperature and pressure for making to come out from plate heat exchanger C (Intermediate Heat Exchanger)
The supercooling of refrigerant R23 liquid, to promote the refrigerating capacity of low-temperature circulating, i.e., lifting system refrigerating capacity the advantages of；In addition, this reality
Regenerator I is used with novel, there is the refrigerant R23 steam overheat for making the low-temp low-pressure come out from evaporator D, it is ensured that enter
The low-temperature low-pressure refrigerant R23 steam of low-temperature level compressor A2 is dry flue gas, so that it is guaranteed that low-temperature level compressor A2 is safely operated
The advantages of.
In practical application, expansion vessel H in low-temperature circulating can work as low temperature after system-down, since temperature raises
All gasification is superheated vapor to refrigerant R23 in circulation in pipeline and equipment, leads to pressure rise, is more than compressor and other
When the maximum working pressure (MWP) of equipment, pressure-control valve K1 is opened, and some refrigerant R23 steam is made to enter expansion vessel H, is reduced
Pressure.On the pipeline that expansion vessel H is connected with low-temperature level compressor A2 suction pipe, check valve K2, system starting have been installed additional
When operation, the temperature and pressure of 1 ' side of low-temperature level compressor A2 suction pipe is reduced, and the pressure in expansion vessel H is higher than low temperature
The pressure of 1 ' side of grade compressor A2 suction pipe, since there are pressure differences, refrigerant R23 is from expansion vessel H, by unidirectional
Valve K2 enters low-temperature level compressor A2 suction pipe 1 '.
The utility model uses expansion vessel H, has and pressure in low-temperature circulating system is maintained to be in service pressure model
In enclosing, it is ensured that the advantages of relevant device and pipe safety in low-temperature circulating are run；In addition, the utility model uses expansion vessel
H is connected with the air-breathing pipeline 1 ' of low-temperature level compressor A2 and outlet pipeline 2, and in connecting tube, has installed pressure control additional
Valve K processed, high-temperature level compressor A1 and low-temperature level compressor A2 can be started simultaneously by having, and keep system starting more convenient, quick
The advantages of.In addition to this, on the pipeline that expansion vessel H is connected with low-temperature level compressor A2 suction pipe, check valve has been installed additional
K2 has when low-temperature circulating system operates normally, prevents low-temperature refrigerant R23 steam from entering expansion vessel H, avoid increasing low
The usage amount of warm refrigerant R23, the advantages of reaching save the cost.
In practical application, the low-temperature low-pressure refrigerant R23 liquid in low-temperature circulating enters evaporator D, and evaporation endothermic occurs
Phase transformation forms the refrigerant R23 steam of low-temp low-pressure.Refrigerant R23 produces cooling capacity by absorbing heat in evaporator D.
In evaporator D, refrigerating capacity is conveyed by refrigerating medium E, is used.The specific heat capacity of refrigerating medium E is big, can maintain temperature phase
To stabilization.
The utility model has long distance delivery cooling capacity using conveying in refrigerating medium E to refrigerating capacity, and convenient for control
The advantages of with distribution cooling capacity；The advantages of various equipment with centralized arrangement refrigerating plant reduce occupied area, facilitate management；
With the total measurement (volume) for reducing refrigerant R23 in low-temperature circulating, that is, reduce the filling of refrigerant R23 in low-temperature circulating refrigeration system
Amount, and reduce the leakage rate in operational process, thus the advantages of reaching save the cost；With to freezing object holding temperature
Metastable advantage.
In practical application, quick coupling J1~J12 of use belongs to the special quick coupling of ultralow temperature, has good resistance to low
Warm nature and resistance to pressure.The utility model uses quick coupling, is conducive to the connection of equipment and pipeline enclosure, is easily installed, tears open
The advantages of unloading, repairing.In practical application, the pipeline of use all has good temperature tolerance, resistance to pressure, and resists to refrigerant
Corrosivity.
By in above description it is recognised that micro-channel heat exchanger, gas-liquid heat exchanger (first order heat exchanger), board-like
Heat exchanger (Intermediate Heat Exchanger) can be replaced with the equipment of said function, and high temperature refrigerant, may also be used equally low-temperature refrigerant
Refrigerant replace, therefore, in a specific embodiment, this specific embodiment is only carried out by taking above equipment, refrigerant as an example
Description, it will be understood that foregoing description is not limited only to above equipment and refrigerant.
Although the preferred embodiment of the utility model has been described, once a person skilled in the art knows basic
Creative concept, then additional changes and modifications can be made to these embodiments.It is wrapped so the following claims are intended to be interpreted as
It includes preferred embodiment and falls into all change and modification of the scope of the utility model.
Claims (7)
1. a kind of refrigerating type low-temperature circulating device, which is characterized in that including high temperature circulation subelement, low-temperature circulating subelement, incite somebody to action
The Intermediate Heat Exchanger that high temperature circulation subelement is mutually bridged with low-temperature circulating subelement；
The high temperature circulation subelement includes high-temperature level compressor, first order heat exchanger, first order heat exchanger, first order throttling
Device；The high temperature and pressure import connection first order heat exchanger of the first order heat exchanger is simultaneously high by the connection of first order heat exchanger
The high temperature and pressure of warm grade compressor exports, and the first nuclear one-stage throttling device of high temperature and pressure outlet of first order heat exchanger simultaneously passes through
The low-temp low-pressure import of Intermediate Heat Exchanger is connected to after first nuclear one-stage throttling device reducing pressure by regulating flow, the low-temp low-pressure of the Intermediate Heat Exchanger goes out
The low-temp low-pressure inlet communication of mouth and first order heat exchanger, and high-temperature level compressor is flowed back by first order heat exchanger
On, form high temperature circulation channel；
The low-temperature circulating subelement includes evaporator, low-temperature level compressor, the second nuclear one-stage throttling device, regenerator；The evaporation
The low-temp low-pressure import of the low-temp low-pressure outlet connection regenerator of device simultaneously connects low-temperature level compressor by regenerator；The backheat
The high temperature and pressure import of device connects low-temperature level compressor, high temperature and pressure outlet the second nuclear one-stage throttling device of connection of regenerator and the
In the low-temp low-pressure import for connecting evaporator after two-step throttle device reducing pressure by regulating flow, low-temperature circulating channel is formed.
2. refrigerating type low-temperature circulating device according to claim 1, which is characterized in that the low-temperature circulating subelement also wraps
Expansion vessel is included, the front end of the expansion vessel is connected in the communicating passage of regenerator and low-temperature level compressor, rear end connection
In the communicating passage of low-temperature level compressor and Intermediate Heat Exchanger.
3. refrigerating type low-temperature circulating device according to claim 2, which is characterized in that the front passage of the expansion vessel
It is provided with check valve, the rear end channel of the expansion vessel is provided with pressure-control valve.
4. refrigerating type low-temperature circulating device according to claim 3, which is characterized in that the first order heat exchanger is micro- logical
Road heat exchanger, the first order heat exchanger are gas-liquid heat exchanger, and the Intermediate Heat Exchanger is plate heat exchanger.
5. refrigerating type low-temperature circulating device according to claim 4, which is characterized in that the high temperature circulation subelement follows
What is be added in ring channel is high temperature refrigerant, and what is be added in the circulation canal of the low-temperature circulating subelement is cryogenic refrigeration
Agent.
6. refrigerating type low-temperature circulating device according to claim 5, which is characterized in that the high temperature refrigerant is
R600a, the low-temperature refrigerant are R23.
7. refrigerating type low-temperature circulating device according to claim 6, which is characterized in that the evaporator is externally connected with refrigerating
Channel, the refrigerating channel convey refrigerating capacity by refrigerating medium E.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822069096.3U CN209355535U (en) | 2018-12-11 | 2018-12-11 | A kind of refrigerating type low-temperature circulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822069096.3U CN209355535U (en) | 2018-12-11 | 2018-12-11 | A kind of refrigerating type low-temperature circulating device |
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| Publication Number | Publication Date |
|---|---|
| CN209355535U true CN209355535U (en) | 2019-09-06 |
Family
ID=67798729
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822069096.3U Expired - Fee Related CN209355535U (en) | 2018-12-11 | 2018-12-11 | A kind of refrigerating type low-temperature circulating device |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147516A (en) * | 2021-12-02 | 2022-03-08 | 大连理工大学 | Cascade type refrigeration and freezing clamping device |
-
2018
- 2018-12-11 CN CN201822069096.3U patent/CN209355535U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147516A (en) * | 2021-12-02 | 2022-03-08 | 大连理工大学 | Cascade type refrigeration and freezing clamping device |
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