CN206556300U - A kind of closed air refrigeration machine - Google Patents
A kind of closed air refrigeration machine Download PDFInfo
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- CN206556300U CN206556300U CN201720008751.7U CN201720008751U CN206556300U CN 206556300 U CN206556300 U CN 206556300U CN 201720008751 U CN201720008751 U CN 201720008751U CN 206556300 U CN206556300 U CN 206556300U
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- cooler
- centrifugal compressor
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Abstract
The utility model discloses a kind of closed air refrigeration machine, include the centrifugal blower being interconnected by pipeline, expansion work retracting device, return cooler, use cold unit, expansion work retracting device includes centrifugal compressor and turbo-expander, centrifugal blower outlet is connected with the centrifugal compressor entrance by pipeline, centrifugal compressor outlet is connected with described time cooler hot-side inlet by pipeline, the outlet of cooler hot junction is gone back to the turboexpander inlet by pipeline to be connected, turbo-expander outlet is connected with described with cold unit entrance by pipeline, it is connected with the outlet of cold unit with returning cooler cold-side inlet by pipeline, cooler cold side outlet is returned with the centrifugal blower entrance by pipeline to be connected.The utility model utility model replaces piston compressor and piston type turbine on conventional air refrigeration machine using centrifugal fan and turbo-expander, the optimal pressure ratio of selection, so that the coefficient of refrigerating performance of refrigeration system is maximum, efficiency of refrigerator is improved, electric energy is saved.
Description
Technical field：
The utility model is related to refrigerating field, relates generally to a kind of closed air refrigeration machine, is specially to be used as system using air
The refrigeration system of cold medium, is the closed air refrigeration machine for being related to a kind of compressor and expanding machine one in particular.
Background technology：
As CFC refrigerants are substituted, being limited of HCFC refrigerants, substitute and HFC refrigerant greenhouse effects,
Cryogenic refrigeration industry is just in the new natural refrigerant of developmental research.Using air as the refrigeration machine of refrigerant, no matter from protection ozone
Layer is all preferable refrigeration machine for global warming is delayed.Air is used as a kind of environmentally friendly and extremely facile gas
Body, replaces conventional refrigerants to have great potentiality using it as refrigerant.But, the critical-temperature of air it is very low (-
140.75 DEG C), cold air machine does not have phase transformation in air adjustment and freezing and refrigeration temperature field, can only utilize sensible heat.But its
There is some superiority in cryogenic freezing refrigeration field, but because cold air machine is nontoxic, non-ignitable, low pressure, ODP and GWP are zero, to ring
Border is friendly, is widely applied in some special dimensions, aircraft air-conditioning system, train air-conditioning, environment are mainly used at present
The fields such as laboratory, petrochemical industry processing, food fresh-keeping and snap frozen.
In order to improve the efficiency in air-refrigeration system, it is desirable to provide corresponding measure, such as expansion work is reclaimed, Hui Leng is set
Device, to improve the thermal efficiency.In existing refrigeration system, compressor and expanding machine are often separated, and refrigeration machine passes through expansion
The expansion work that machine is produced can only be wasted, if this demi-inflation work(is reclaimed, used, certainly will be increased as the kinetic energy of compressor
The efficiency of whole system.
Utility model content：
The utility model purpose is exactly that it is adopted in order to make up the defect of prior art there is provided a kind of closed air refrigeration machine
The method that is reclaimed with expansion work and the efficiency that whole system is improved by adding back cooler in systems, so as to reach saving system
Cooling system consumes electric energy, improves the efficiency of whole system.
The utility model is achieved through the following technical solutions：
A kind of closed air refrigeration machine, it is characterised in that：Include the centrifugal blower being interconnected by pipeline, expansion work
Retracting device, return cooler, use cold unit, the expansion work retracting device includes centrifugal compressor and turbo-expander, described
Centrifugal blower outlet is connected with the centrifugal compressor entrance by pipeline, the centrifugal compressor outlet and described time cooler heat
End entrance is connected by pipeline, and the outlet of described time cooler hot junction is connected with the turboexpander inlet by pipeline, described
Flat expander outlet is connected with described with cold unit entrance by pipeline, and the cold unit outlet enters with described time cooler cold end
Mouth is connected by pipeline, and described time cooler cold side outlet is connected with the centrifugal blower entrance by pipeline.
The exit of described turbo-expander is connected with muffler.
Connected between described centrifugal compressor and turbo-expander by connecting shaft Synchronous Transmission, by reclaiming expansion work
The effect that expansion work is reclaimed is reached as the kinetic energy of the centrifugal compressor.
The described cooler that returns is binary channels, and device for cooling return-air is used in wherein cold-side inlet access, and after heat exchange, cold side outlet connects
To centrifugal blower porch；Hot-side inlet is connected with the centrifugal compressor outlet of expansion work retracting device, and outlet is returned with expansion work
The turboexpander inlet of receiving apparatus is connected.
Its principle is：There is no extraneous air to enter in system, be a closed type structure separated with the external world, shown expansion work
Retracting device is that the braking blower of turbo-expander is transformed into centrifugal compressor to apply in systems as high stage compressor,
The improved centrifugal compressor is directly connected with expanding machine by connecting rod, and the expansion work retracting device is made by reclaiming expansion work
For the kinetic energy of the centrifugal compressor, so as to reach the effect that expansion work is reclaimed.
The utility model has the advantages that：
1. in a cold air machine, connecting shaft is directly used as the centrifugal compressor and turbo-expander of high stage compressor
It is connected, high stage compressor is substantially exactly the braking blower of this turbo-expander.When gas enters turbo-expander to this device
Do manual work, the expansion work of acquisition is directly transmitted to centrifugal compressor by the connecting rod between them, regard this demi-inflation work(as second
The kinetic energy of level compressor, so as to reach the purpose of energy-conservation, improves overall efficiency.
2. because the system uses air as its refrigerant, eliminate evaporator necessary to conventional chiller.So
The topmost equipment of this refrigeration system only has centrifugal blower, expansion work retracting device and returns cooler.So the system is simple in construction,
The initial investment for installing the system is saved, while for ease of maintenaince, and due to eliminating evaporator, it is not required that strengthen heat exchange
The device such as fan, so as to save electric energy.
3. it is less as work required for the centrifugal blower of first order compressor because the compression ratio of the system is relatively low,
The compression ratio higher relative to conventional chiller, saves the input of energy.
4. the system adds back cooler, by the way that heat exchange will be carried out with cold unit outlet and compressor outlet, improve
Compressor inlet temperature, reduces turboexpander inlet temperature, so as to improve the thermal efficiency of complete machine.
Brief description of the drawings：
Fig. 1 is structural representation of the present utility model.
Embodiment：
Referring to accompanying drawing.
A kind of closed air refrigeration machine, include centrifugal blower 1, expansion work retracting device 2, return cooler 3, with cold unit 4,
Muffler 5, wherein expansion work retracting device 2 include centrifugal compressor 21, turbo-expander 22 and the connection being connected between them
Axle 23, bearing 24, centrifugal blower outlet are connected with the entrance of centrifugal compressor 21, the centrifugal compressor 21 export and
Described time the hot-side inlet of cooler 3 is connected, and the outlet of the described time hot junction of cooler 3 is connected with the entrance of turbo-expander 22, described
The flat outlet of expanding machine 22 is connected with described with the cold entrance of unit 4, described with the outlet of cold unit 4 and the described time cold-side inlet of cooler 3
It is connected, the described time cold side outlet of cooler 3 is connected with the entrance of centrifugal blower 1.The centrifugal compressor 21 and turbo-expander
22 are connected by connecting shaft 23.
The described outlet of turbo-expander 22 is connected with muffler 5.
Axle between described centrifugal compressor 21 and turbo-expander 22 is fixed by bearing 24.
During work：Air first passes through centrifugal blower 1 and is pressurized, and is then pressurized again into centrifugal compressor 21, afterwards
Into returning cooler 3 and heat exchange being carried out with the low temperature return-air of cold unit so as to reduce temperature, subsequently into the gas of turbo-expander 22
Body constant entropy expansion in expanding machine, obtains expansion work and is conducted to centrifugal compressor 21 by connecting shaft 23 and be used as its compression energy
Amount.Sent into by the cryogenic gas of turbo-expander 22 with cold unit 4.Cryogenic gas is after with absorption heat in cold unit 4
It is re-introduced into refrigeration system, although gas is absorbing certain heat with cold unit, but generally speaking still falls within temperature
Relatively low gas, enters back the cold end of cooler 3 afterwards, carries out heat exchange with the high temperature outlet of high stage compressor, improves itself
Temperature, subsequently into centrifugal blower 1.This completes one cycle.
Turbo-expander 22 is connected by refrigeration system of the present utility model with centrifugal compressor 21 with same axle so that gas
Expansion work produced by body passes through expanding machine is recycled, and is used as the input work of centrifugal compressor.So that this is
Unite compared to legacy system in the case where obtaining the air conditionses of uniform pressure, the work(of required input is less.And return the effect of cooler
It is the inlet temperature for improving centrifugal blower 1, while reducing the inlet temperature of turbo-expander 22 so that whole system is compared
There is the higher thermal efficiency compared with conventional chiller, and more save electric energy.
Claims (4)
1. a kind of closed air refrigeration machine, it is characterised in that：Include the centrifugal blower being interconnected by pipeline, expansion work to return
Receiving apparatus, return cooler, use cold unit, the expansion work retracting device includes centrifugal compressor and turbo-expander, it is described from
Heart fan outlet is connected with the centrifugal compressor entrance by pipeline, the centrifugal compressor outlet and described time cooler hot junction
Entrance is connected by pipeline, and the outlet of described time cooler hot junction is connected with the turboexpander inlet by pipeline, the turbine
Expander outlet is connected with described with cold unit entrance by pipeline, described with the outlet of cold unit and described time cooler cold-side inlet
It is connected by pipeline, described time cooler cold side outlet is connected with the centrifugal blower entrance by pipeline.
2. closed air refrigeration machine according to claim 1, it is characterised in that：The exit of described turbo-expander connects
It is connected to muffler.
3. closed air refrigeration machine according to claim 1, it is characterised in that：Described centrifugal compressor and turbine expansion
Connected between machine by connecting shaft Synchronous Transmission, reach that expansion work is returned by reclaiming expansion work as the kinetic energy of the centrifugal compressor
The effect of receipts.
4. closed air refrigeration machine according to claim 1, it is characterised in that：The described cooler that returns is binary channels, wherein
Device for cooling return-air is used in cold-side inlet access, and after heat exchange, cold side outlet is connected to centrifugal blower porch；Hot-side inlet and expansion work
The centrifugal compressor outlet of retracting device is connected, and outlet is connected with the turboexpander inlet of expansion work retracting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720008751.7U CN206556300U (en) | 2017-01-05 | 2017-01-05 | A kind of closed air refrigeration machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720008751.7U CN206556300U (en) | 2017-01-05 | 2017-01-05 | A kind of closed air refrigeration machine |
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| CN206556300U true CN206556300U (en) | 2017-10-13 |
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| CN201720008751.7U Active CN206556300U (en) | 2017-01-05 | 2017-01-05 | A kind of closed air refrigeration machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642782A (en) * | 2017-01-05 | 2017-05-10 | 中国科学院合肥物质科学研究院 | Closed air refrigerating machine |
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2017
- 2017-01-05 CN CN201720008751.7U patent/CN206556300U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642782A (en) * | 2017-01-05 | 2017-05-10 | 中国科学院合肥物质科学研究院 | Closed air refrigerating machine |
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