CN201096428Y - Superposition type refrigerating unit auxiliary device - Google Patents
Superposition type refrigerating unit auxiliary device Download PDFInfo
- Publication number
- CN201096428Y CN201096428Y CNU2007200444243U CN200720044424U CN201096428Y CN 201096428 Y CN201096428 Y CN 201096428Y CN U2007200444243 U CNU2007200444243 U CN U2007200444243U CN 200720044424 U CN200720044424 U CN 200720044424U CN 201096428 Y CN201096428 Y CN 201096428Y
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- low temperature
- temperature level
- refrigerating unit
- magnetic valve
- auxiliary device
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Abstract
The utility model discloses an auxiliary device of a cascade refrigerating unit, which comprises a high temperature refrigerating unit and a low temperature refrigerating unit connected at both ends of a condensation evaporator, a first electromagnetic valve is connected on a low temperature liquid line between an exit of the condensation evaporator and an expansion valve, the first electromagnetic valve is connected with an entrance of an air storage tank, a second electromagnetic valve is connected on a vapor return pipeline of a low temperature compressor, and the second electromagnetic valve is connected with an exit of the air storage tank; and the device maintains the appropriate condensing pressure in the low temperature grade through the variable flow control, and can continue to work to supply cold air reliably.
Description
Technical field
The utility model 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 utility model purpose is: a kind of cascade refrigerating unit auxiliary device is provided, this device can be in the low temperature level starts back a period of time or stores according to the load size normally move the time in good time or discharge low-temperature refrigerant in the air accumulator, regulate by the unsteady flow amount, make and keep suitable condensing pressure in the low temperature level, and the energy continuous firing, thereby can reliable cooling.
The technical solution of the utility model 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, be connected with first magnetic valve on the outlet of described condenser/evaporator and the low temperature level liquid pipe between the expansion valve, first magnetic valve is connected with the import of air accumulator, be connected with second magnetic valve on the back-steam pipeline of low temperature stage compressor, second magnetic valve is connected with the outlet of air accumulator.
The utility model is intended to increase easy device in the common cascade refrigeration machine, partly starts, moves and can normally carry out with low temperature in the auxiliary cascade refrigeration system.The low-temperature refrigerant that the low temperature level adopts in the superposition type system generally has higher equalizing pressure when normal temperature, after the startup, condensing pressure sharply rises in short time, high temperature level refrigeration system remains unchanged by the ability of cooling of heat exchanger to low temperature level cold-producing medium, so, corresponding raising is as easy as rolling off a log not to cause high voltage protective switch or thermal protector action that system is quit work to the pressure at expulsion of moment rising because of cooling effect has, and causes the low temperature level to start failure; Perhaps after the low temperature level starts operation, make system pressure higher, cause the low temperature stage pressure too high and shut down because of the evaporimeter heat load increases.This all directly causes the cooling failure.The servicing unit that increases can be when starting the low temperature level, will be collected in low-temperature refrigerant in the air accumulator gradually by magnetic valve and controlledly discharge and get back in the low temperature circulatory system.Reduce the amount of the cold-producing medium that circulates in good time, reduce the cold-producing medium evaporating pressure, thus suppressed the low temperature level after startup in the short time or the fluctuation of evaporimeter thermic load causes in the running condensing pressure on scurry.The enforcement of this servicing unit, but effectively start and reliability of operation.
The utility model advantage is:
1. the utility model has improved cascade refrigeration unit low temperature level and has started success rate and the reliability of moving cooling.
2. the utility model structure is simple relatively, and the cost and the process complexity of increase are less.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is a structural representation of the present utility model.
Wherein: 1 condenser/evaporator; 2 high temperature level refrigeration unit; 3 low temperature level refrigeration unit; 4 expansion valves; 5 low temperature level liquid pipes; 6 first magnetic valves; 7 air accumulators; 8 low temperature stage compressors; 9 second 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 low temperature level refrigeration unit 3 that are connected condenser/evaporator 1 two ends, be connected with first magnetic valve 6 on the low temperature level liquid pipe 5 between the outlet of condenser/evaporator 1 and the expansion valve 4, first magnetic valve 6 is connected with the import of air accumulator 7, being connected with second magnetic valve, 9, the second magnetic valves 9 on the back-steam pipeline of low temperature stage compressor 8 is connected with the outlet of air accumulator 7.
The utility model is connected with first magnetic valve 6 in low temperature level liquid pipe 5 pipelines of the outlet of condenser/evaporator 1 and on the branch line that connects, during 6 actions of first magnetic valve, can make the low temperature level high-pressure refrigerant part bypass that flows to electric expansion valve 4 after the condensation enter in the air accumulator 7, the outlet of air accumulator 7 is connected with second magnetic valve 9, during the action of second magnetic valve 9, the pipeline of the air entry of low-temperature refrigerant by being attempted by low temperature stage compressor 8 flows back in the low temperature level system in the air accumulator 7.
The utility model can be in the low temperature level starts back a period of time or stores according to the load size normally move the time in good time or discharge low-temperature refrigerant in the air accumulator 7, regulate by the unsteady flow amount, make and keep suitable condensing pressure in the low temperature level, and can continuous firing, thereby can reliable cooling.
Be connected with pressure sensor and temperature sensor in the low temperature level system, first magnetic valve 6 and second magnetic valve 9 are not opened simultaneously, and the opening and closing of first magnetic valve 6, second magnetic valve 9 are according to pressure sensor, the unified control of temperature sensor detected value.
Below only be concrete exemplary applications of the present utility model, protection domain of the present utility model is not constituted any limitation.In addition to the implementation, the utility model can also have other embodiment.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the utility model scope required for protection.
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: be connected with first magnetic valve (6) on the low temperature level liquid pipe (5) between the outlet of described condenser/evaporator (1) and the expansion valve (4), first magnetic valve (6) is connected with the import of air accumulator (7), be connected with second magnetic valve (9) on the back-steam pipeline of low temperature stage compressor (8), second magnetic valve (7) is connected with the outlet of air accumulator (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200444243U CN201096428Y (en) | 2007-09-30 | 2007-09-30 | Superposition type refrigerating unit auxiliary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200444243U CN201096428Y (en) | 2007-09-30 | 2007-09-30 | Superposition type refrigerating unit auxiliary device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201096428Y true CN201096428Y (en) | 2008-08-06 |
Family
ID=39923481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200444243U Expired - Fee Related CN201096428Y (en) | 2007-09-30 | 2007-09-30 | Superposition type refrigerating unit auxiliary device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201096428Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486754A (en) * | 2013-08-26 | 2014-01-01 | 安徽亿瑞深冷能源科技有限公司 | Energy-saving middle temperature refrigerant/middle temperature refrigerant cascade refrigeration system |
| CN103673368A (en) * | 2013-12-27 | 2014-03-26 | 天津商业大学 | Superposed refrigerating system capable of adjusting air-intake temperature of compressor |
| CN104180549A (en) * | 2014-08-25 | 2014-12-03 | 天津商业大学 | Exhaust-temperature-adjustable cascade refrigerating system and exhaust cooling device |
| CN105276848A (en) * | 2014-06-26 | 2016-01-27 | 舟山金瀛制冷科技有限公司 | Refrigerating system and refrigerating technique |
-
2007
- 2007-09-30 CN CNU2007200444243U patent/CN201096428Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486754A (en) * | 2013-08-26 | 2014-01-01 | 安徽亿瑞深冷能源科技有限公司 | Energy-saving middle temperature refrigerant/middle temperature refrigerant cascade refrigeration system |
| CN103486754B (en) * | 2013-08-26 | 2015-12-23 | 安徽亿瑞深冷能源科技有限公司 | A kind of energy-conservation middle temperature cold-producing medium/middle temperature cold-producing medium cascade refrigeration system |
| CN103673368A (en) * | 2013-12-27 | 2014-03-26 | 天津商业大学 | Superposed refrigerating system capable of adjusting air-intake temperature of compressor |
| CN105276848A (en) * | 2014-06-26 | 2016-01-27 | 舟山金瀛制冷科技有限公司 | Refrigerating system and refrigerating technique |
| CN104180549A (en) * | 2014-08-25 | 2014-12-03 | 天津商业大学 | Exhaust-temperature-adjustable cascade refrigerating system and exhaust cooling device |
| CN104180549B (en) * | 2014-08-25 | 2016-05-11 | 天津商业大学 | The folding type cooling system of adjustable delivery temperature and exhaust cooling device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080806 Termination date: 20140930 |
|
| EXPY | Termination of patent right or utility model |