CN208431974U - A kind of device making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period - Google Patents
A kind of device making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period Download PDFInfo
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- CN208431974U CN208431974U CN201821009572.6U CN201821009572U CN208431974U CN 208431974 U CN208431974 U CN 208431974U CN 201821009572 U CN201821009572 U CN 201821009572U CN 208431974 U CN208431974 U CN 208431974U
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Abstract
A kind of device making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period, including cryogenic refrigerating system and refrigerating medium heating system, the cryogenic refrigerating system includes refrigerant storage tank, the first evaporator, the second evaporator, low-temperature level compressor, cooler, gs-oil separator, refrigerating medium storage tank and circulating pump；The end of refrigerant outlet pipeline is divided into two-way, the first via is connected through the first expansion valve, the first evaporator with low-temperature level compressor, second the second expansion valve of tunnel, the second evaporator are connected with low-temperature level compressor, and low-temperature level compressor, cooler, gs-oil separator pass sequentially through pipeline with refrigerant storage tank and be connected；The refrigerating medium storage tank is connected by pipeline with circulating pump, the end of the outlet conduit of circulating pump is divided into two-way, the first via is back to refrigerating medium storage tank through the first solenoid valve, the first evaporator, second solenoid valve, and the second tunnel is back to refrigerating medium storage tank through third solenoid valve, the second evaporator, the 4th solenoid valve.
Description
Technical field
The utility model belongs to refrigerating field, and in particular to one kind keeps the high refrigerating capacity of superposition type Cryo Refrigerator long period steady
Surely the device run.
Background technique
Cascade refrigeration cycle is that biggish total temperature difference is divided into two sections or several segments, is selected according to every section of warm area suitable
Suitable refrigerant circulation, then stacks up them, and the condensation load of low-temperature level is undertaken with the refrigerating capacity of high-temperature level, thus
Obtain the mode of lower cryogenic temperature.
Cascade refrigeration belongs to a kind of special shape of steam compression type refrigeration, usually by two to three operation temperature areas difference
Independent steam compression type refrigeration recycle composition, by taking two-stage Cascade refrigeration cycle as an example, it is by high-temperature level and low-temperature level two
It is grouped as, medium temperature refrigerant is used in high-temperature level, low-temperature refrigerant is used in low-temperature level, forms two single-stage compression refrigeration systems
The circulation of overlapping work.It is linked up between two-stage system using condenser/evaporator, the medium temperature refrigerant of high-temperature level steams wherein
Hair refrigeration, makes low-temperature refrigerant heat release wherein, is condensed into liquid after carrying out heat exchange with the medium temperature refrigerant of evaporation.From cold
The medium temperature refrigerant vapour that solidifying evaporator comes out takes away the condenser heat of low-temperature refrigerant, by high-temperature level refrigeration cycle by heat
Pass to surrounding medium.And the low-temperature refrigerant liquid come out from condenser/evaporator, after the decompression of low-temperature level throttle valve, into steaming
Send out device draw cooled object heat and sweat cooling, obtain required for low temperature.
The advantages of cascade cycle freezes is to recycle by conventional steam compression type refrigerating, in service pressure model
It is able to achieve the cryogenic temperature down to -140 DEG C under the premise of enclosing with pressure ratio, has greatly been widened while making working efficiency often
The refrigeration temperature area of rule system.Superposition type deep cooling unit is greater than mainly on freezer, pharmacy with more in single machine refrigerating capacity
300kw, warm area is at -60 DEG C to -90 DEG C, and greater than 72 hours long periods are not shut down to be run under operating condition, and domestic refrigeration machine is extremely difficult to.
Utility model content
In order to overcome the drawbacks of the prior art, the purpose of this utility model is to provide one kind to make superposition type Cryo Refrigerator
The device of the high refrigerating capacity stable operation of long period.
A kind of device making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period, including cryogenic refrigerating system and
Refrigerating medium heating system, the cryogenic refrigerating system include refrigerant storage tank, the first evaporator, the second evaporator, low-temperature level pressure
Contracting machine, cooler, gs-oil separator, refrigerating medium storage tank and circulating pump；The end of refrigerant outlet pipeline is divided into two-way, the
Be connected all the way through the first expansion valve, the first evaporator with low-temperature level compressor, second the second expansion valve of tunnel, the second evaporator with
Low-temperature level compressor is connected, and low-temperature level compressor, cooler and gs-oil separator pass sequentially through pipeline and be connected, gs-oil separator
Outlet is connected by pipeline with the import of refrigerant storage tank；
The refrigerating medium storage tank is connected by pipeline with circulating pump, and the end of the outlet conduit of circulating pump is divided into two-way, the
It is back to refrigerating medium storage tank through the first solenoid valve, the first evaporator, second solenoid valve all the way, the second tunnel is through third solenoid valve,
Two evaporators, the 4th solenoid valve are back to refrigerating medium storage tank.
The refrigerating medium heating system includes refrigerating medium heating tank and re-heat canned motor pump, and refrigerating medium heating tank and re-heat shield
Pump by pipeline connect, the end of re-heat canned motor pump export pipeline set there are two branch, a branch is through the 5th solenoid valve, first
Evaporator, the 6th solenoid valve are back to refrigerating medium heating tank, another branch is through the 7th solenoid valve, the second evaporator, the 8th electricity
Magnet valve is back to refrigerating medium heating tank.
The top of the refrigerating medium heating tank is connected by pipeline with refrigerating medium storage tank, and the pipeline is equipped with safety valve.
It is set on the outlet conduit of the refrigerating medium storage tank there are two branch, a branch road is equipped with circulating pump, another branch
Road is equipped with cooling supply and pumps.
The refrigerant of cryogenic refrigerating system application is R23, and refrigeration oil SOLEST32, refrigerating medium is methylene chloride.
Regulating valve is equipped on the inlet and outlet pipeline of the refrigerant storage tank, on the outlet conduit of gs-oil separator.
Pipeline between first evaporator and low-temperature level compressor is equipped with first pressure gauge, the second evaporator and low
Pipeline between warm grade compressor is equipped with second pressure gauge.
The identical cryogenic vaporizer of two abilities is arranged in superposition type Cryo Refrigerator low temperature supplying cold spots in the utility model,
Two carry out alternation and re-heat, and refrigerating capacity declines when solving the problems, such as Cryo Refrigerator long-term operation.This is practical
It is novel when carrying out re-heat, will not to refrigerant circulation generate significant impact, so that refrigeration unit is followed at steady-state always
Ring refrigeration.
Specifically, one group of cryogenic vaporizer runing time less than 48 hours, low-temperature level Compressor Inlet Pressure is
0.6-1.5bar, outlet pressure 15-20bar.
For first evaporator when carrying out swell refrigeration, the second evaporator then carries out heating re-heat, when changing middle long with evaporation plate
Between run the R23 of accumulation and plate changes the refrigeration oil of attachment.When the second evaporator operation, the first evaporator then carries out re-heat behaviour
Make, whole process can reach seamless switching by procedure auto-control.Using refrigerating medium cooling supply, carried with industrial circulating water heating
Cryogen, refrigerating medium heat cryogenic vaporizer and (are removed evaporation plate with the defrosting for realizing evaporator and change what middle long-play accumulated
R23 and plate change the refrigeration oil of attachment).The evaporator that re-heat terminates then is in standby in case switching.
Refrigerating medium heating tank can be by multiple heating modes such as industrial recirculated water, middle water.It can by the evaporator temperature of re-heat
After being increased to 5-32 DEG C, keep to defrost completely for 30-60 minutes.By the switching of each valve group of PLC Automatic Control, it is not required to very important person
Work participates in, and design parameter can adjust according to the actual situation.When re-heat program stopped, refrigerating medium is remained in refrigerating medium heating tank
At 5-32 DEG C.Safety valve is arranged in top, and Spillover Medium flows into refrigerating medium storage tank.
Compared to the prior art, the beneficial effects of the utility model are:
An evaporator is all arranged in traditional cascade refrigeration machine, will cause under refrigerating capacity and efficiency after long-term operation
Drop, fluctuation of service.The utility model in this overlapping deep cooling machine low temperature supplying cold spots there are two the identical cryogenic vaporizer of ability,
Two carry out alternation and re-heat (defrosting), by refrigeration oil and refrigerant shadow when solving Cryo Refrigerator long-term operation
The problem of refrigerating capacity caused by sound declines.The utility model will not generate great shadow to refrigerant circulation when carrying out re-heat
It rings, makes refrigeration unit circularly cooling at steady-state always, achieved the purpose that indirectly energy-saving.The utility model energy
Keep superposition type Cryo Refrigerator higher to cooling capacity stability requirement, and can be provided for duty cycle longer industrial manufacture process
More stable cooling capacity supply.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；In figure, 1. refrigerant storage tanks, 21. first expansion valves, 22. second is swollen
Swollen valve, 31. first evaporators, 32. second evaporators, 41. first pressure gauges, 42. second pressure gauges, 51. first solenoid valves,
52. second solenoid valve, 53. third solenoid valves, 54. the 4th solenoid valves, 55. the 5th solenoid valves, 56. the 6th solenoid valves, 57. the 7th
Solenoid valve, 58. the 8th solenoid valves, 6. low-temperature level compressors, 7. coolers, 8. refrigerating medium storage tanks, 9. circulating pumps, 10. refrigerating mediums
Heating tank, 11. re-heat canned motor pumps, 12. cooling supply pump, 13. gs-oil separators, 14. regulating valves, 15. safety valves.
Specific embodiment
As shown in Figure 1, a kind of device for making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period, including low temperature
Refrigeration system and refrigerating medium heating system, the cryogenic refrigerating system include that refrigerant storage tank 1, the first expansion valve 21, second are swollen
Swollen valve 22, the first evaporator 31, the second evaporator 32, first pressure gauge 41, second pressure gauge 42, low-temperature level compressor 6, cooling
Device 7, gs-oil separator 13, refrigerating medium storage tank 8, circulating pump 9 and cooling supply pump 12；The end of 1 outlet conduit of refrigerant storage tank is divided into
Two-way, the first via are connected through the first expansion valve 21, the first evaporator 31, first pressure gauge 41 with low-temperature level compressor 6, and described
One evaporator 31 and the second evaporator 32 include hot-fluid pipeline and cold flow pipeline, the first expansion valve 21 and the first evaporator 31
Cold flow pipeline is connected, second tunnel the second expansion valve 22, the second evaporator 32, second pressure gauge 42 and 6 phase of low-temperature level compressor
Even, the second expansion valve 22 is connected with the cold flow pipeline of the second evaporator 32, low-temperature level compressor 6, cooler 7 and gs-oil separator
13, which pass sequentially through pipeline, is connected, and the outlet of gs-oil separator 13 is connected by pipeline with the import of refrigerant storage tank 1, Oil-gas Separation
It is all provided on the pipeline in 13 exit of device, on the entrance pipeline of refrigerant storage tank 1 and on the exit pipeline of refrigerant storage tank 1
There is regulating valve 14；The refrigerant is bottom in and top out in the trend of the first evaporator 31, the second evaporator 32.
It is set on 8 outlet conduit of refrigerating medium storage tank there are two branch, a branch road is equipped with circulating pump 9, another branch
Road is equipped with cooling supply pump 12, is back to refrigerating medium storage tank 8, the outlet of circulating pump 9 after 12 submitting refrigerating medium of cooling supply pump is heated
The end of pipeline is divided into two-way, and the first via is returned through the first solenoid valve 51, the hot-fluid pipeline of the first evaporator 31, second solenoid valve 52
It is back to refrigerating medium storage tank 8, the second tunnel is returned through third solenoid valve 53, the hot-fluid pipeline of the second evaporator 32, the 4th solenoid valve 54
To refrigerating medium storage tank 8；Trend of the refrigerating medium in the first evaporator 31, the second evaporator 32 in the refrigerating medium storage tank 8 is equal
It is upper entering and lower leaving.
The refrigerating medium heating system includes refrigerating medium heating tank 10 and re-heat canned motor pump 11, refrigerating medium heating tank 8 and multiple
Heat shielding pump 11 by pipeline connect, the end of 11 export pipeline of re-heat canned motor pump set there are two branch, a branch is through the 5th
Solenoid valve 55, the first evaporator 31, the 6th solenoid valve 56 are back to refrigerating medium heating tank 10, another branch is through the 7th solenoid valve
57, the second evaporator 32, the 8th solenoid valve 58 are back to refrigerating medium heating tank 10.5th solenoid valve 55 and the first evaporator
31 hot-fluid pipeline is connected, and the 7th solenoid valve 57 is connected with the hot-fluid pipeline of the second evaporator 32, refrigerating medium heating tank 10
In trend of the refrigerating medium in the first evaporator 31, the second evaporator 32 be bottom in and top out.
The top of the refrigerating medium heating tank 10 is connected by pipeline with refrigerating medium storage tank 8, and the pipeline is equipped with safety
Valve 15 overflows refrigerating medium in refrigerating medium heating tank 10 and flows into refrigerating medium storage tank 8.
The refrigerant of cryogenic refrigerating system application is R23, refrigeration oil SOLEST32, equipped with refrigeration in refrigerant storage tank 1
Agent R23 and refrigeration oil SOLEST32, refrigerating medium are methylene chloride, and refrigerating is housed in refrigerating medium heating tank 10 and refrigerating medium storage tank 8
Agent methylene chloride.
When work, for example, re-heat (when defrosting) need to be carried out to the second evaporator 32, the first evaporator 31 is work shape
State, third solenoid valve 53, the 4th solenoid valve 54, the 5th solenoid valve 55, the 6th solenoid valve 56 and the second expansion valve 32 are closed, system
(- 25 ~ -50 DEG C) liquid refrigerant R23 and refrigeration oil SOLEST32 in cryogen storage tank 1 is through 21 swell refrigeration of the first expansion valve
(after expanded valve throttling, become lower -80 ~ -95 DEG C of gas-liquid mixtures of pressure into the cold flow pipeline of the first evaporator 31 afterwards
Afterwards, it is sent into evaporator, is absorbed heat in evaporator and is sufficiently evaporated and become the lower steam of pressure), at this point, from refrigerating medium storage tank 8
In come out heat methylene chloride (- 50 ~ -80 DEG C) through circulating pump 9, the first solenoid valve 51 enter the first evaporator 31 hot-fluid
Channel and refrigerant R23 exchange heat, and R23 and refrigeration oil SOLEST32, which become entering low-temperature level compressor 6 after gas, to be pressed
Contracting, the R23 gas and refrigeration oil SOLEST32 of high temperature and pressure (temperature is 90 ~ 120 DEG C, pressure 15-22bar) enter cooler
7 are cooled to liquid (- 25 ~ -50 DEG C), and liquid after cooling is back to refrigerant storage tank 1 through gs-oil separator 13 after purification,
The methylene chloride (- 80 ~ -95 DEG C) that cooling capacity is absorbed in first evaporator 31 is back to refrigerating medium storage tank 8 through second solenoid valve 52,
Meanwhile hot (5-32 DEG C) methylene chloride enters second through re-heat canned motor pump 11, the 7th solenoid valve 57 in refrigerating medium heating tank 10
The heat passage of evaporator 32 carries out heating defrosting to the second evaporator 32, and cooled methylene chloride (2-10 DEG C) is through the 8th electricity
Magnet valve 58 is back to refrigerating medium heating tank 10.
When needing to carry out re-heat to the first evaporator 31, the second evaporator 32 is in working condition, the first solenoid valve 51, the
Two solenoid valves 52, the 7th solenoid valve 57, the 8th solenoid valve 58 and the first expansion valve 21 are closed, and the automatic switchover of evaporator is completed
Operation.Refrigerant R23 and refrigeration oil SOLEST32 enters the cold flow of the second evaporator 32 after 22 swell refrigeration of the second expansion valve
Pipeline, at this point, the methylene chloride of the heat come out from refrigerating medium storage tank 8 enters the second evaporation through circulating pump 9, third solenoid valve 53
Heat passage and refrigerant R23, the refrigeration oil SOLEST32 of device 32 exchange heat, and R23 and refrigeration oil SOLEST32 become low pressure
Enter low-temperature level compressor 6 after gas to be compressed, the R23 and refrigeration oil SOLEST32 gas of high temperature and pressure enter cooler 7
It is cooled to liquid, liquid after cooling is back to refrigerant storage tank 1 through gs-oil separator 13 after purification, in the second evaporator 32
The methylene chloride for absorbing cooling capacity is back to refrigerating medium storage tank 8 through the 4th solenoid valve 54, meanwhile, hot two in refrigerating medium heating tube 10
The heat passage that chloromethanes enters the first evaporator 31 through re-heat canned motor pump 11, the 5th solenoid valve 55 carries out the first evaporator 31
Heating defrosting, cooled methylene chloride are back to refrigerating medium heating tank 10 through the 6th solenoid valve 56.
After the first 31 re-heat of evaporator, the first expansion valve 21 is opened, and the second expansion valve 22 is closed.Switch to the first evaporation
Device 31 works, and 32 re-heat of the second evaporator carries out repeatedly.
The runing time of one group of evaporator is controlled less than 48 hours, 6 inlet pressure of low-temperature level compressor is 0.6-1.5bar,
High pressure (i.e. 6 outlet pressure of cryogenic compressor) is always in 15-22bar.
Refrigerating medium heating tank 10 can be by multiple heating modes pair such as industrial recirculated water (25 ~ 32 DEG C), middle water (5 ~ 30 DEG C)
Refrigerating medium is heated, not just merely because the temperature of recirculated water, middle water is suitable, it is often more important that recirculated water, middle water will not change
The form of variable load cryogen methylene chloride (but returns to methylene chloride in heating tank and refrigerating medium heating from the evaporator after re-heat
The mixed temperature of methylene chloride in tank 10 should be higher than the freezing point of water, so re-heat evaporator is sent in control when re-heat
Methylene chloride amount and remaining methylene chloride in refrigerating medium heating tank 10 amount it is very crucial, otherwise heat medium recirculated water etc.
Have the possibility for the solidification that freezes).
After circulation is warming up to and is increased to 5-32 DEG C by the evaporator temperature of re-heat, re-heat canned motor pump 11 is kept for 30-60 minutes
Defrosting process can be completed in circulation.Entire re-heat and handoff procedure are not required to very important person by the switching of each valve of PLC Automatic Control
Work participates in, and design parameter can adjust according to the actual situation.When re-heat program stopped, refrigerating medium is protected always in refrigerating medium heating tank 10
It holds at 5-32 DEG C.
The automatic re-heat of evaporator in less than 48 hours and switching be once both able to satisfy the production needs in example.If any higher
It is required that when, it can the time appropriate that automatic re-heat and switching be reduced.
The utility model can be continuously to stabilization cooling capacity supply in chemical process offer 720 hours or more.It is raw to meet this chemical industry
Refrigeratory capacity demand.And Cryo Refrigerator is stable, operational efficiency relatively before single evaporator Cryo Refrigerator significantly increase.
The identical low-temperature evaporation of two abilities is arranged in superposition type Cryo Refrigerator low temperature supplying cold spots in the utility model
Device --- the first evaporator 31 and the second evaporator 32, two carry out alternation and re-heat, to solve cryogenic refrigeration captain's week
The problem of refrigerating capacity declines when phase runs.The utility model will not generate great shadow to refrigerant circulation when carrying out re-heat
It rings, makes refrigeration unit circularly cooling at steady-state always.
Claims (7)
1. a kind of device for making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period, including cryogenic refrigerating system and load
Cryogen heating system, it is characterized in that: the cryogenic refrigerating system include refrigerant storage tank, it is the first evaporator, the second evaporator, low
Warm grade compressor, cooler, gs-oil separator, refrigerating medium storage tank and circulating pump；The end of refrigerant outlet pipeline is divided into
Two-way, the first via are connected through the first expansion valve, the first evaporator with low-temperature level compressor, second the second expansion valve of tunnel, second
Evaporator is connected with low-temperature level compressor, and low-temperature level compressor, cooler and gs-oil separator pass sequentially through pipeline and be connected, oil gas
The outlet of separator is connected by pipeline with the import of refrigerant storage tank；
The refrigerating medium storage tank is connected by pipeline with circulating pump, and the end of the outlet conduit of circulating pump is divided into two-way, the first via
It is back to refrigerating medium storage tank through the first solenoid valve, the first evaporator, second solenoid valve, the second tunnel is steamed through third solenoid valve, second
Hair device, the 4th solenoid valve are back to refrigerating medium storage tank.
2. the device according to claim 1 for making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period, special
Sign is: the refrigerating medium heating system includes refrigerating medium heating tank and re-heat canned motor pump, refrigerating medium heating tank and re-heat canned motor pump
It is connected by pipeline, the end of re-heat canned motor pump export pipeline is set there are two branch, and a branch is steamed through the 5th solenoid valve, first
Hair device, the 6th solenoid valve are back to refrigerating medium heating tank, another branch is through the 7th solenoid valve, the second evaporator, the 8th electromagnetism
Valve is back to refrigerating medium heating tank.
3. the device according to claim 2 for making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period, special
Sign is: the top of the refrigerating medium heating tank is connected by pipeline with refrigerating medium storage tank, and the pipeline is equipped with safety valve.
4. the device according to claim 1 for making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period, special
Sign is: is set on the outlet conduit of the refrigerating medium storage tank there are two branch, a branch road is equipped with circulating pump, another branch road
It is pumped equipped with cooling supply.
5. the device according to claim 1 for making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period, special
Sign is: the refrigerant of cryogenic refrigerating system application is R23, and refrigeration oil SOLEST32, refrigerating medium is methylene chloride.
6. the device according to claim 1 for making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period, special
Sign is: being equipped with regulating valve on the inlet and outlet pipeline of the refrigerant storage tank, on the outlet conduit of gs-oil separator.
7. the device according to claim 1 for making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period, special
Sign is: the pipeline between first evaporator and low-temperature level compressor is equipped with first pressure gauge, the second evaporator and low temperature
Pipeline between grade compressor is equipped with second pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821009572.6U CN208431974U (en) | 2018-06-28 | 2018-06-28 | A kind of device making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821009572.6U CN208431974U (en) | 2018-06-28 | 2018-06-28 | A kind of device making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period |
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| Publication Number | Publication Date |
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| CN208431974U true CN208431974U (en) | 2019-01-25 |
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ID=65099204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821009572.6U Active CN208431974U (en) | 2018-06-28 | 2018-06-28 | A kind of device making the high refrigerating capacity stable operation of superposition type Cryo Refrigerator long period |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208431974U (en) |
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2018
- 2018-06-28 CN CN201821009572.6U patent/CN208431974U/en active Active
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191220 Address after: 467013 high tech Development Zone, Jianshe Road, Henan, Pingdingshan Patentee after: Henan Shenma Nylon Chemical Co., Ltd. Address before: 467013 high tech Development Zone, Jianshe Road, Henan, Pingdingshan Co-patentee before: Pingdingshan salens Technology Co., Ltd. Patentee before: Henan Shenma Nylon Chemical Co., Ltd. |
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| TR01 | Transfer of patent right |