CN107388613A - Superposition type energy-saving refrigerating system - Google Patents
Superposition type energy-saving refrigerating system Download PDFInfo
- Publication number
- CN107388613A CN107388613A CN201710755379.0A CN201710755379A CN107388613A CN 107388613 A CN107388613 A CN 107388613A CN 201710755379 A CN201710755379 A CN 201710755379A CN 107388613 A CN107388613 A CN 107388613A
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- Prior art keywords
- evaporator
- tributary
- compressor
- heat exchanger
- output end
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000006386 neutralization reaction Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 10
- 239000003507 refrigerant Substances 0.000 description 49
- 238000005057 refrigeration Methods 0.000 description 21
- 239000007788 liquid Substances 0.000 description 13
- 239000003921 oil Substances 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000003079 width control Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2521—On-off valves controlled by pulse signals
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The present invention discloses a kind of superposition type energy-saving refrigerating system, including the first refrigerating circuit and the second refrigerating circuit, and first refrigerating circuit includes the first compressor, the first condenser and the first evaporator being sequentially connected；The heat exchange tributary arranged side by side with first evaporator is additionally provided between the input of the output end of first condenser and first compressor, the heat exchange tributary is provided with heat exchanger；Second refrigerating circuit includes the second compressor, the second condenser, the heat exchanger and the second evaporator being sequentially connected；It is additionally provided between the input of the output end of second compressor and second evaporator and maintains tributary with heat exchanger low temperature arranged side by side.The advantages of present invention is big with cryogenic temperature span, and energy-saving effect is good.
Description
Technical field
The present invention relates to a kind of refrigeration system, more particularly to a kind of superposition type energy-saving refrigerating system.
Background technology
The temperature and humidity control system of existing constant temperature and moisture test machine are typically a kind of internal circulation system, when needs pair
It is that cold air is blown out to laboratory by refrigeration system, cold air mixes with the high-temperature gas in laboratory when laboratory is cooled
Cooling, the gas of higher temperatures is blown out by refrigeration system again in laboratory afterwards, so as to realize circulating cooling.It is however, traditional
Refrigeration system generally only forms refrigerating circuit by a compressor, a condenser and an evaporator and realizes refrigeration, refrigeration temperature
To spend minimum for -20 degree, such refrigeration system can not reach lower temperature, and because loop is excessively simple, can not
Precise control of temperature, so that refrigeration precision is low.And existing another folding type cooling system, it is by two groups of refrigeration systems
Loop simultaneously carries out cascade refrigeration using heat exchanger, although can reach the temperature refrigeration temperature lower than traditional cryogenic temperature
Spend it is minimum can reach -80 degree, still, when reaching more low temperature, refrigeration system still can high power work to maintain low temperature shape
State；Also, when excessive temperature reduces (being less than required steady temperature), heated using heater, to be warming up to
The low-temperature condition to be maintained, therefore, used heater can consume larger energy again, and energy-saving effect is very poor.
The content of the invention
It is an object of the invention to provide a kind of cryogenic temperature span is big, and the energy-saving refrigeration of superposition type that energy-saving effect is good
System.
To achieve these goals, superposition type energy-saving refrigerating system provided by the invention includes the first refrigerating circuit and the
Two refrigerating circuits, first refrigerating circuit include the first compressor, the first condenser and the first evaporator being sequentially connected；Institute
State be additionally provided between the output end of the first condenser and the input of first compressor it is arranged side by side with first evaporator
Heat exchange tributary, the heat exchange tributary are provided with heat exchanger；Second refrigerating circuit includes the second pressure being sequentially connected
Contracting machine, the second condenser, the heat exchanger and the second evaporator；The output end of second compressor is steamed with described second
It is additionally provided between the input of hair device and maintains tributary with heat exchanger low temperature arranged side by side.
Compared with prior art, because the present invention is using by setting the first refrigerating circuit and the second refrigerating circuit, then profit
First refrigerating circuit and the second refrigerating circuit are formed to the refrigeration system of superposition type with heat exchanger, therefore, examination can be made
Lower temperature can be reached by testing room, and cryogenic temperature span is big；And due to the output end and the second evaporator in the second compressor
Input between be provided with and maintain tributary with heat exchanger low temperature arranged side by side, therefore, after laboratory reaches relatively low temperature,
Only need to open the low temperature maintenance tributary, maintain tributary to be cooperated with the second refrigerating circuit using low temperature, so as to tie up
The low-temperature condition in the laboratory is held, avoid tradition from being heated using heater and consume extra electric energy, therefore, Ke Yi great
The big consumption for reducing electric energy, improves energy-saving effect.
It is preferred that the low temperature maintains tributary to be provided with the first pulse control valve.First pulse control valve can have
The control of effect ground maintains the refrigerant of the second evaporator conveying described in Zhi Liuxiang from the low temperature, so as to maintain the temperature of laboratory
Degree, is also accurately controlled the conveying capacity of refrigerant, effectively reduces energy consumption.
It is preferred that the second pulse control valve is provided between the heat exchanger and second evaporator.Second arteries and veins
The refrigerant for flowing to the second evaporator conveying can be accurately controlled by rushing control valve, so as to also be accurately controlled the temperature of laboratory
Degree.
It is preferred that it is additionally provided between the input of the output end of the heat exchanger and second compressor and described
Two evaporators pressure release tributary arranged side by side.Set the pressure release tributary to ensure the pressure in second refrigerating circuit, prevent
Pressure is excessive and damages the heat exchanger.
It is preferred that electronic throttle is provided with before the input of first evaporator.Set the electronic throttle can be with
The conveying capacity for the refrigerant for being sent to the first evaporator is accurately controlled, so as to can both accurately control temperature, and can effectively reduces
Energy consumption.
It is preferred that it is provided between the output end of first condenser and the output end of first evaporator and described the
One evaporator neutralization tributary arranged side by side.Flowed out from the refrigerant of the relatively low temperature of neutralization tributary outflow and from first evaporator
The refrigerants of higher temperatures neutralized, can cool rapidly, so as to ensure that the refrigerant for being back to the first compressor is in normal
Temperature, avoid damaging the first compressor.
Specifically, the neutralization tributary is provided with the first expansion valve.First expansion valve can evaporate by described first
The degree of superheat of device end, which changes, to control the flow of refrigerant, prevents that the refrigerant of neutralization tributary output is very few and makes the refrigerant after neutralization
Temperature is still too high.
It is preferred that the second expansion valve is provided with before the heat exchanger input.Second expansion valve passes through heat exchanger end
The degree of superheat at end changes to control the flow of refrigerant, makes cascade refrigeration effect more preferable.
It is preferred that the output end of first evaporator is provided with pressure-regulating valve.The pressure-regulating valve is used to control institute
The pressure in the first evaporator is stated to prevent the first evaporator from freezing.
Brief description of the drawings
Fig. 1 is the structure chart of the first refrigerating circuit of superposition type energy-saving refrigerating system of the present invention.
Fig. 2 is the structure chart of the second refrigerating circuit of superposition type energy-saving refrigerating system of the present invention.
Embodiment
To describe the technology contents of the present invention, construction feature, the effect realized in detail, below in conjunction with embodiment and match somebody with somebody
Accompanying drawing is closed to be explained in detail.
As shown in Figure 1 and Figure 2, superposition type energy-saving refrigerating system of the invention includes the first refrigerating circuit 1 and the second refrigeration
Loop 2, first refrigerating circuit 1 include be sequentially connected the first compressor 101, the first oil 102, the first condenser 103,
First fluid reservoir 104, first filter 105, magnetic valve 106, electronic throttle 107, the first evaporator 108, pressure-regulating valve
109th, the first qi leel 110 and the first air pressure adjustment valve 116；The output end of first compressor 101 is additionally provided with first pressure guarantor
Protection unit 117；The output end of first oil 102 is connected with the input of first compressor 101 again, first oil
102 are divided to be used to separate the gaseous refrigerant and fluid of first compressor 101 output；First condenser 103 is used for
Refrigerant is condensed into liquid from gaseous state；The electronic throttle 107 can be accurately controlled the refrigerant for being sent to the first evaporator 108
Conveying capacity, so as to can both accurately control temperature, and can effectively reduces energy consumption.The pressure-regulating valve 109 is used to control
Pressure in first evaporator 108, so as to prevent first evaporator 108 from nearby freezing.First qi leel
110 are used to gasify to remaining liquid refrigerants；The first air pressure adjustment valve 116 is used to prevent the first compressor from 101 surpassing
Load operation.
Again as shown in figure 1, between the input of the output end of first condenser 103 and first compressor 101
The heat exchange tributary 11 arranged side by side with first evaporator 108 is additionally provided with, specifically, the input in the heat exchange tributary 11 connects
It is connected between the first filter 105 and magnetic valve 106, the output end in the heat exchange tributary 11 is connected to the pressure and adjusted
Between whole valve 109 and first qi leel 110；The heat exchange tributary 11 is provided with heat exchanger 111, forms superposition type system
It is cold；The second expansion valve 112 is provided with before the input of heat exchanger 111.Second expansion valve 112 passes through heat exchanger 111
The degree of superheat of end changes to control cold medium flux, makes the effect of cascade refrigeration more preferable.The input of second expansion valve 112
Magnetic valve 115 is provided with before end.
Again referring to Fig. 1, between the output end of first condenser 103 and the output end of first evaporator 108
Provided with the neutralization tributary 12 arranged side by side with first evaporator 108.Specifically, the input for neutralizing tributary 12 is connected to institute
State between first filter 105 and magnetic valve 106, the output end for neutralizing tributary 12 is connected to first evaporator 108
Between the pressure-regulating valve 109；The neutralization tributary 12 is provided with the first expansion valve 113.First expansion valve 113
Magnetic valve 114 is provided with before input.The refrigerant of the relatively low temperature flowed out from the neutralization tributary 12 with from first evaporator 108
The refrigerant of the higher temperatures of outflow is neutralized, and can be cooled rapidly, so as to ensure that the refrigerant for being back to the first compressor 101 is in
Normal temperature, avoid damaging the first compressor 101.First expansion valve 113 can pass through the end of the first evaporator 108
The degree of superheat change control neutralize tributary 12 cold medium flux, the pressure-regulating valve 109 by control it is described first evaporation
Pressure in device 108 prevents the first evaporator 108 from freezing.
Referring to Fig. 2, second refrigerating circuit 2 include being sequentially connected the second compressor 201, the second oil 202, the
Two condensers 203, the heat exchanger 111, the second filter 204, the second pulse control valve 205, capillary 206, second steam
Send out device 207, the second qi leel 208 and the second air pressure adjustment valve 209.The output end of second compressor 201 is additionally provided with the second pressure
Try hard to keep protection unit 215；The output end of second oil 202 is connected with the input of second compressor 201 again, and described the
Two oils 202 are used to separate the gaseous refrigerant and fluid of second compressor 201 output；Second condenser 203
For by refrigerant from the gaseous gaseous state for being condensed into more low temperature；Second pulse control valve 205 can accurately control flow direction
The refrigerant that second evaporator 207 conveys, so as to also be accurately controlled the temperature of laboratory.Second qi leel 208 is used for
Remaining liquid refrigerants is gasified；The second air pressure adjustment valve 215 is used to prevent the excess load work of the second compressor 201
Make.In addition, the refrigerant in second refrigerating circuit 2 is different from the refrigerant in first refrigerating circuit 1, described second
Refrigerant in refrigerating circuit 2 is lower than the condensation temperature of the refrigerant in first refrigerating circuit 1.
Again referring to Fig. 2, between the input of the output end of second compressor 201 and second evaporator 207
It is additionally provided with and maintains tributary 21 with the heat exchanger 111 low temperature arranged side by side.Specifically, the low temperature maintains the input in tributary 21
It is connected between second oil 202 and second condenser 203；The low temperature maintains the output end in tributary 21 to be connected to
Between the capillary 206 and second evaporator 207.The low temperature maintains tributary 21 to be provided with the first pulse control valve
210.The output end of first pulse control valve 210 is provided with capillary 214 again.First pulse control valve 210 can have
The refrigerant that the control of effect ground conveys from low temperature maintenance tributary 21 to second evaporator 207, so as to which laboratory can be maintained
Temperature, be also accurately controlled the conveying capacity of refrigerant, effectively reduce energy consumption.
Again as shown in Fig. 2 between the input of the output end of the heat exchanger 111 and second compressor 201 also
Provided with the pressure release tributary 22 arranged side by side with the evaporator.Specifically, the input in the pressure release tributary 22 is connected to described second
Between filter 204 and second pulse control valve 205, the output end in the pressure release tributary 22 is connected to second evaporation
Between the qi leel 208 of device 207 and second.Relief valve 211, the second fluid reservoir 212 and capillary are sequentially provided with the pressure release tributary 22
Pipe 213.Set the pressure release tributary 22 to ensure the pressure in second refrigerating circuit 2, prevent that pressure is excessive and damages
The heat exchanger 111.
Summary simultaneously combines Fig. 1 and Fig. 2, and several refrigeration modes of the refrigeration system of the present invention are described below,
It is as follows：
When the state that the temperature for needing to make laboratory reaches a high temperature, such as 100 degree to 200 degree of scope, can be made
One refrigerating circuit 1 and the second refrigerating circuit 2 are stopped, and start heater, so as to be heated to the temperature of laboratory, with
The state to reach a high temperature.
When needing to make the temperature of laboratory reach the state of medium temperature, such as 0 degree to 100 degree of scope, institute can be started
The first compressor 101 is stated, and second refrigerating circuit 2 is stopped, the magnetic valve 106 in the heat exchange tributary 11 is closed；
At this moment, first compressor 101 transfers out refrigerant, and refrigerant forms liquid, the refrigerant of liquid by the first condenser 103
Enter first evaporator after the first fluid reservoir 104, first filter 105, magnetic valve 106 and electronic throttle 107
The air of 108 pairs of laboratories carries out fast cooling, and is cooperated with heater, so as to so that the temperature of laboratory reaches
To middle temperature state.At the same time, the magnetic valve 114 is opened when necessary, and refrigerant is by first expansion valve 113 and outflow
The refrigerant of first evaporator 108 neutralizes, and reduces the refrigerant temperature for being back to the first qi leel 110.
When needing to make the temperature of laboratory reach the state of low temperature, such as 0 degree of scope to -80 degree, it can open simultaneously
Move the refrigerating circuit 2 of the first refrigerating circuit 1 and second；In first refrigerating circuit 1, the magnetic valve 106 and electromagnetism
Valve 114 is closed, and magnetic valve 115 is opened；First compressor 101 transfers out gaseous refrigerant, and refrigerant is cold by first
Condenser 103 forms liquid, and the refrigerant of liquid enters the heat exchange branch after the first fluid reservoir 104 and first filter 105
Stream 11, and the refrigerant of the second refrigerating circuit 2 in heat exchanger 111 is cooled, form the refrigerant of the second refrigerating circuit 2
The refrigerant of liquid.And during this, the second compressor 201 of second refrigerating circuit 2 is also lasting defeated by gaseous refrigerant
See off, gaseous refrigerant becomes liquid by the second condenser 203 and heat exchanger 111, and the refrigerant of liquid passes through second again
Enter second evaporator 207 after filter 204, the second pulse control valve 205, so as to the air cooling-down of laboratory, from
And the temperature of laboratory can be made to reach low-temperature condition.And after reaching low-temperature condition, in order to maintain this low-temperature condition, described
Two pulse control valves 205 are beaten simultaneously per opening after a while once to convey the refrigerant of liquid to second evaporator 207
First pulse control valve 210 is opened, first pulse control valve 210 directly ties up a certain amount of gaseous refrigerant from low temperature
Tributary 21 is held to be transported in second evaporator 207, due to liquid refrigerant there is a possibility that laboratory excessive temperature decline,
And gaseous refrigerant can be such that the temperature of laboratory somewhat rises, therefore, pass through the second pulse control valve 205 and the first Pulse Width Control
The collaborative work of valve 210 can accurately maintain the constant low temperature in laboratory.And in the prior art, the refrigerant of liquid
To being heated up after laboratory's excessive drop temperature usually using heater to laboratory, heater needs to consume extra electric energy, because
And low temperature of the invention maintains tributary 21 to reduce energy consumption.
Compared with prior art, because the present invention is utilized by the first refrigerating circuit 1 of setting and the second refrigerating circuit 2, then
The refrigerating circuit 2 of first refrigerating circuit 1 and second is formed to the refrigeration system of superposition type using heat exchanger 111, therefore, can
So that laboratory can reach lower temperature, cryogenic temperature span is big；And due to the output end and the in the second compressor 201
It is provided between the input of two evaporators 207 and maintains tributary 21 with the heat exchanger 111 low temperature arranged side by side, therefore, works as experiment
After room reaches relatively low temperature, it is only necessary to open the low temperature and maintain tributary 21, and gas is controlled by the first pulse control valve 210
The flow of the refrigerant of state, using the collaborative work of the second pulse control valve 205 and the first pulse control valve 210, so as to tie up
The low-temperature condition in laboratory is held, avoids heating using heater and consuming extra electric energy.Therefore, whole refrigeration system can be with
The consumption of electric energy is reduced, is greatly enhanced energy-saving effect.
The above disclosed right model for being only the preferred embodiments of the present invention, the present invention can not being limited with this certainly
Enclose, therefore the equivalent variations made according to scope of the present invention patent, still fall within the scope that the present invention is covered.
Claims (9)
- A kind of 1. superposition type energy-saving refrigerating system, it is characterised in that：It is described including the first refrigerating circuit and the second refrigerating circuit First refrigerating circuit includes the first compressor, the first condenser and the first evaporator being sequentially connected；First condenser The heat exchange tributary arranged side by side with first evaporator is additionally provided between the input of output end and first compressor, it is described Heat exchange tributary is provided with heat exchanger；Second refrigerating circuit include be sequentially connected the second compressor, the second condenser, The heat exchanger and the second evaporator；Between the input of the output end of second compressor and second evaporator It is additionally provided with and maintains tributary with heat exchanger low temperature arranged side by side.
- 2. superposition type energy-saving refrigerating system as claimed in claim 1, it is characterised in that：The low temperature maintains tributary to be provided with First pulse control valve.
- 3. superposition type energy-saving refrigerating system as claimed in claim 1, it is characterised in that：The heat exchanger and described second The second pulse control valve is provided between evaporator.
- 4. superposition type energy-saving refrigerating system as claimed in claim 1, it is characterised in that：The output end of the heat exchanger with The pressure release tributary arranged side by side with second evaporator is additionally provided between the input of second compressor.
- 5. superposition type energy-saving refrigerating system as claimed in claim 1, it is characterised in that：The input of first evaporator It is preceding to be provided with electronic throttle.
- 6. superposition type energy-saving refrigerating system as claimed in claim 1, it is characterised in that：The output end of first condenser The neutralization tributary arranged side by side with first evaporator is provided between the output end of first evaporator.
- 7. superposition type energy-saving refrigerating system as claimed in claim 6, it is characterised in that：The neutralization tributary is provided with first Expansion valve.
- 8. superposition type energy-saving refrigerating system as claimed in claim 1, it is characterised in that：Set before the heat exchanger input There is the second expansion valve.
- 9. superposition type energy-saving refrigerating system as claimed in claim 1, it is characterised in that：The output end of first evaporator Provided with pressure-regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710755379.0A CN107388613A (en) | 2017-08-29 | 2017-08-29 | Superposition type energy-saving refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710755379.0A CN107388613A (en) | 2017-08-29 | 2017-08-29 | Superposition type energy-saving refrigerating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107388613A true CN107388613A (en) | 2017-11-24 |
Family
ID=60346392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710755379.0A Pending CN107388613A (en) | 2017-08-29 | 2017-08-29 | Superposition type energy-saving refrigerating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107388613A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202420018U (en) * | 2012-01-13 | 2012-09-05 | 重庆市威尔试验仪器有限公司 | Energy-saving mixed cascade refrigeration system |
| CN104807231A (en) * | 2015-05-12 | 2015-07-29 | 上海海洋大学 | Switchable two-stage cascade energy-saving ultralow-temperature refrigeration system for ship |
| CN207247610U (en) * | 2017-08-29 | 2018-04-17 | 东莞市伟煌试验设备有限公司 | Superposition type energy-saving refrigerating system |
-
2017
- 2017-08-29 CN CN201710755379.0A patent/CN107388613A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202420018U (en) * | 2012-01-13 | 2012-09-05 | 重庆市威尔试验仪器有限公司 | Energy-saving mixed cascade refrigeration system |
| CN104807231A (en) * | 2015-05-12 | 2015-07-29 | 上海海洋大学 | Switchable two-stage cascade energy-saving ultralow-temperature refrigeration system for ship |
| CN207247610U (en) * | 2017-08-29 | 2018-04-17 | 东莞市伟煌试验设备有限公司 | Superposition type energy-saving refrigerating system |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171124 |
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| RJ01 | Rejection of invention patent application after publication |