CN101050895A - Cascade refrigerating unit auxiliary device - Google Patents
Cascade refrigerating unit auxiliary device Download PDFInfo
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- CN101050895A CN101050895A CN 200710022614 CN200710022614A CN101050895A CN 101050895 A CN101050895 A CN 101050895A CN 200710022614 CN200710022614 CN 200710022614 CN 200710022614 A CN200710022614 A CN 200710022614A CN 101050895 A CN101050895 A CN 101050895A
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- low temperature
- temperature level
- compressor
- cascade
- auxiliary device
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- 238000005057 refrigeration Methods 0.000 claims description 21
- 239000003507 refrigerant Substances 0.000 description 8
- 238000001816 cooling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
An auxiliary device of cascade refrigerator set is prepared for connecting auxiliary compressor to air inlet end of low-temperature compressor on low-temperature grade of refrigerator set, connecting auxiliary compressor to air storage tank through one-way valve and directly connecting air storage tank to air inlet end of low-temperature compressor through solenoid valve for raising efficiency and reliability of start-up for cascade refrigerator set.
Description
Technical field
The present invention relates to a kind of cascade refrigerating unit auxiliary device.
Background technology
Industrial (as oil, chemical industry etc.) in order to satisfy requirements such as production technology and scientific research, generally adopts steam compression type low temperature cascade refrigeration EGR to obtain lower evaporating temperature (generally being used for producing-60～-120 ℃ low temperature).The cold machine of this type of superposition type generally is made up of two independent refrigeration systems, be called high temperature level and low temperature level, correspondingly in the system of each independent loops two kinds of different cold-producing mediums have been adopted, warm cold-producing medium during the high temperature level is used, the low temperature level is used low-temperature refrigerant, this type systematic requires under low temperature under the evaporating pressure and environment temperature condensing pressure moderate, can satisfy the designing requirement of refrigerating plant.But the low-temperature refrigerant that adopts in its low temperature level such as R14 or R23; surpassed its critical-temperature at normal temperatures; all exist with gaseous form and equalizing pressure higher; and generally be attached to expansion vessel in the low temperature level system; only be to reduce the equalizing pressure behind the compressor emergency shutdown, the rapid rising to condensing pressure produces little effect behind the unit to starting.So such cascade refrigeration unit often all is that low temperature level short time internal cause condensing pressure is too high and pressure protect occurs after start, cause starting failure or can not starting lastingly, this brings adverse effect to the instructions for use that requires in good time cooling.At present, in the cascade refrigeration machine, it is the most common that common faults starts failure with low temperature level in the main system.Solving smooth startup of the cold machine of superposition type is the important content that improves system reliability.
Summary of the invention
The present invention seeks to: a kind of cascade refrigerating unit auxiliary device is provided, this device can be transferred to part low temperature level cold-producing medium in the air accumulator of servicing unit when starting the low temperature level fast, refrigerant amount reduces in the cryogenic system, thereby scurry on the short time of inhibition low temperature level condensing pressure, after startup operates steadily, again the low-temperature refrigerant in the air accumulator is returned to cryogenic system, make system carry out the transition to normal operating phase, therefore, improve the reliability and the efficient of cascade refrigeration unit starting.
Technical scheme of the present invention is: a kind of cascade refrigerating unit auxiliary device, comprise the high temperature level refrigeration unit and the low temperature level refrigeration unit that are connected the condenser/evaporator two ends, the suction end of the cryogenic compressor of described low temperature level refrigeration unit is connected with auxiliary compressor, auxiliary compressor is connected with air accumulator by check valve, and air accumulator also directly is communicated with by magnetic valve with the suction end of cryogenic compressor.
The present invention is intended to increase easy device in the common cascade refrigeration machine, and low temperature part toggle speed in the cascade refrigeration system is fast, success rate is high to facilitate.The low-temperature refrigerant that superposition type low temperature level adopts generally has higher equalizing pressure when normal temperature; after the startup; condensing pressure can sharply rise in short time; high temperature level refrigeration system remains unchanged by the ability of cooling that plate changes low temperature level cold-producing medium; at this moment; corresponding raising is as easy as rolling off a log not to cause the high voltage protective switch motion that system is quit work to the pressure at expulsion of moment rising because of cooling effect has; perhaps; compressor thermal protector moves and stops compressor, causes the cooling failure of low temperature level.The servicing unit that increases can be after starting the low temperature level, by aspirating the amount of the cold-producing medium that circulates in the low temperature level system, reduce the cold-producing medium evaporating pressure, thereby suppressed low temperature level condensing pressure short time on scurry, in case after thermal balance was set up, system operated steadily, pressure does not have big fluctuation, can stop auxiliary compressor in good time and open magnetic valve the cold-producing medium that stores in the servicing unit is restored in the low temperature level system, thereby remove the attendant effect of servicing unit gradually system.
Advantage of the present invention is:
1. the present invention has improved cascade refrigeration unit low temperature level starting efficiency and has started reliability.
2. the present invention is simple in structure, and the cost and the process complexity of increase are less.
3. therefore the present invention can omit as other assemblies such as expansion vessels.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 is a structural representation of the present invention.
Wherein: 1 condenser/evaporator; 2 high temperature level refrigeration unit; 3 low temperature level refrigeration unit; 4 cryogenic compressors; 5 auxiliary compressors; 6 check valves; 7 air accumulators; 8 magnetic valves.
The specific embodiment
Embodiment: as shown in Figure 1, a kind of cascade refrigerating unit auxiliary device, comprise the high temperature level refrigeration unit 2 and the rudimentary refrigeration unit 3 that are connected condenser/evaporator 1 two ends, the suction end of the cryogenic compressor 4 of described low temperature level refrigeration unit 3 is connected with auxiliary compressor 5, auxiliary compressor 5 is connected with air accumulator 7 by check valve 6, and air accumulator 7 also directly is communicated with by magnetic valve 8 with the suction end of cryogenic compressor 4.
The present invention is connected with auxiliary compressor 5 before the air entry of cryogenic compressor 4, when auxiliary compressor 5 starts, it can be transferred to low temperature refrigerant in the low temperature level in the air accumulator 7, reduce pressure at expulsion owing to cold medium flux in the cryogenic system is not enough, can start the low temperature level rapidly after making the main system start.After refrigerant in the cryogenic system dropped to a certain temperature or pressure, magnetic valve 8 was opened, and air accumulator 7 promptly is communicated with the low temperature level system, got back to the low temperature level system after the low temperature refrigerant that stores in the air accumulator 7 is sucked by cryogenic compressor 4 and participated in kind of refrigeration cycle.The servicing unit that by inserting auxiliary compressor 4 is arranged like this, critical pieces such as air accumulator 7 and solenoid electric valve 8 constitutes can guarantee that low-temperature end can start success rapidly when startup superposition type system.
Claims (1)
1. cascade refrigerating unit auxiliary device, comprise the high temperature level refrigeration unit (2) and the low temperature level refrigeration unit (3) that are connected condenser/evaporator (1) two ends, it is characterized in that: the suction end of the cryogenic compressor (4) of described low temperature level refrigeration unit (3) is connected with auxiliary compressor (5), auxiliary compressor (5) is connected with air accumulator (7) by check valve (6), and air accumulator (7) also directly is communicated with by magnetic valve (8) with the suction end of cryogenic compressor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710022614XA CN100557338C (en) | 2007-05-18 | 2007-05-18 | Cascade refrigerating unit auxiliary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710022614XA CN100557338C (en) | 2007-05-18 | 2007-05-18 | Cascade refrigerating unit auxiliary device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101050895A true CN101050895A (en) | 2007-10-10 |
| CN100557338C CN100557338C (en) | 2009-11-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200710022614XA Expired - Fee Related CN100557338C (en) | 2007-05-18 | 2007-05-18 | Cascade refrigerating unit auxiliary device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100557338C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018076364A1 (en) * | 2016-10-31 | 2018-05-03 | 合肥华凌股份有限公司 | Refrigeration apparatus |
-
2007
- 2007-05-18 CN CNB200710022614XA patent/CN100557338C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018076364A1 (en) * | 2016-10-31 | 2018-05-03 | 合肥华凌股份有限公司 | Refrigeration apparatus |
| US11112156B2 (en) | 2016-10-31 | 2021-09-07 | Hefei Hualing Co., Ltd. | Refrigeration apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100557338C (en) | 2009-11-04 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SUZHOU QUTU THERMAL CONTROL SYSTEM CO., LTD. Free format text: FORMER NAME: SUZHOU QUTU REFRIGERATOR CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: Suzhou City, Jiangsu province 215126 Industrial Park Sheng Pu Zhen Min Sheng Road No. 61 Patentee after: Suzhou Qutu Thermal Control System Co., Ltd. Address before: Suzhou City, Jiangsu province 215126 Industrial Park Sheng Pu Zhen Min Sheng Road No. 61 Patentee before: Suzhou Qutu Refrigerator Co., Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Cascade refrigerating unit auxiliary device Effective date of registration: 20141125 Granted publication date: 20091104 Pledgee: Bank of Communications Ltd Suzhou branch Pledgor: Suzhou Qutu Thermal Control System Co., Ltd. Registration number: 2014320010013 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20160812 Granted publication date: 20091104 Pledgee: Bank of Communications Ltd Suzhou branch Pledgor: Suzhou Qutu Thermal Control System Co., Ltd. Registration number: 2014320010013 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Cascade refrigerating unit auxiliary device Effective date of registration: 20160826 Granted publication date: 20091104 Pledgee: Bank of Communications Ltd Suzhou Industrial Park sub branch Pledgor: Suzhou Qutu Thermal Control System Co., Ltd. Registration number: 2016320010013 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20190118 Granted publication date: 20091104 Pledgee: Bank of Communications Ltd Suzhou Industrial Park sub branch Pledgor: Suzhou Qutu Thermal Control System Co., Ltd. Registration number: 2016320010013 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091104 Termination date: 20190518 |
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| CF01 | Termination of patent right due to non-payment of annual fee |