CN101050894A - Cascade refrigerating unit auxiliary device - Google Patents
Cascade refrigerating unit auxiliary device Download PDFInfo
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- CN101050894A CN101050894A CN 200710022613 CN200710022613A CN101050894A CN 101050894 A CN101050894 A CN 101050894A CN 200710022613 CN200710022613 CN 200710022613 CN 200710022613 A CN200710022613 A CN 200710022613A CN 101050894 A CN101050894 A CN 101050894A
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- temperature level
- low temperature
- refrigeration unit
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- evaporator
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Abstract
An auxiliary device of cascade refrigerator set is prepared for applying plate exchanger with three flow-path as condensation evaporator, connecting two flow-path of said evaporator separately to high-temperature grade of refrigerator set and low-temperature grade of refrigerator set then connecting another one flow-path of said evaporator to energy storage agent tank and driving unit for raising reliability and efficiency 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 after starting the low temperature level, the assisted with high-temperature level is scurried on the short time of inhibition low temperature level condensing pressure the cooling of low temperature level cold-producing medium fast, thereby improves 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 rudimentary refrigeration unit that are connected the condenser/evaporator two ends, described condenser/evaporator is three flow process plate type heat exchangers, wherein two-way is connected with low temperature level refrigeration unit with high temperature level refrigeration unit respectively, other one the tunnel is connected with accumulation of energy agent storage tank and drive unit, and drive unit is the pump that contains magnetic valve.
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, accumulation of energy agent assisted with high-temperature level is fast to the cooling of low temperature level cold-producing medium, suppressed low temperature level condensing pressure short time on scurry, after in case thermal balance is set up, system operates steadily, pressure does not have big fluctuation, at this moment can remove servicing unit from program the attendant effect and the energy storage in good time of system are got ready for starting next time.
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 accumulation of energy agent storage tanks; 5 drive units.
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, described condenser/evaporator 1 is three flow process plate type heat exchangers, wherein two-way is connected with rudimentary refrigeration unit 3 with high temperature level refrigeration unit 2 respectively, other one the tunnel is connected with accumulation of energy agent storage tank 4 and drive unit 5, and drive unit 5 is for containing the pump of magnetic valve.
The present invention adopts three flow process plate type heat exchangers to substitute two common flow process plate type heat exchangers as condenser/evaporator 1, wherein two-way changes function and identical high temperature level refrigeration unit 2 and the low temperature level refrigeration unit 3 promptly distributed to of usage with other common double-current journey plate, other one tunnel flow process is connected with accumulation of energy agent storage tank 4 and drive unit 5 (plate changes, storage tank and pipeline carry out insulation) with copper pipe in this device, fills high-performance accumulation of energy agent in the storage tank 4.Main system starts back operation high temperature level refrigeration unit 2 and drive unit 5 earlier; high temperature level refrigeration unit 2 is carried out heat exchange by condenser/evaporator 1 and accumulation of energy agent; the accumulation of energy agent is cooled to uniform temperature after a period of time; after low temperature level refrigeration unit 3 starts; drive unit 5 impels low temperature accumulation of energy agent to enter three flow process plates to change condenser/evaporator 1; the high temperature level refrigeration unit 2 cooling low temperature level refrigeration unit 3 that a large amount of released cold quantities of accumulation of energy agent assist to start operation have in advance just started metacyclic cold-producing medium; with its temperature of quick reduction and condensing pressure, prevent that low temperature level refrigeration unit 3 is owing to the soaring too high pressure protect that occurs of pressure.Can realize accumulating the quick released cold quantity of cold by control in good time, impel low temperature level refrigeration unit 3 to start operation smoothly effectively servicing units such as accumulation of energy agent storage tank 4, drive units 5.By insulation, accumulation of energy agent loss of refrigeration capacity is less, can shorten the pre-cool time of high temperature level refrigeration unit 2, in a word, the normal device that starts of this auxiliary cascade refrigeration unit has the cold of accumulating and release in good time, has effectively assisted the normal startup operation of low temperature level refrigeration unit 3.
Claims (2)
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: described condenser/evaporator (1) is three flow process plate type heat exchangers, wherein two-way is connected with rudimentary refrigeration unit (3) with high temperature level refrigeration unit (2) respectively, and other one the tunnel is connected with accumulation of energy agent storage tank (4) and drive unit (5).
2. cascade refrigerating unit auxiliary device according to claim 1 is characterized in that: described drive unit (5) can be the pump that contains magnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710022613 CN101050894A (en) | 2007-05-18 | 2007-05-18 | Cascade refrigerating unit auxiliary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710022613 CN101050894A (en) | 2007-05-18 | 2007-05-18 | Cascade refrigerating unit auxiliary device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101050894A true CN101050894A (en) | 2007-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200710022613 Pending CN101050894A (en) | 2007-05-18 | 2007-05-18 | Cascade refrigerating unit auxiliary device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893344A (en) * | 2010-06-24 | 2010-11-24 | 中国科学院理化技术研究所 | Low-temperature liquefaction system for dual cycle of mixed working medium |
| CN102297512A (en) * | 2011-08-12 | 2011-12-28 | 侯全舵 | Cascade type heat pump system |
| CN104913541A (en) * | 2015-03-09 | 2015-09-16 | 浙江大学 | Stirling cycle and steam compression refrigeration cycle directly-coupled refrigerating machine and method |
| CN105823251A (en) * | 2016-06-05 | 2016-08-03 | 山东商业职业技术学院 | Honeycomb-type low-temperature quick cold charging system |
| CN109511272A (en) * | 2016-08-02 | 2019-03-22 | 三菱电机株式会社 | Heat pump assembly |
-
2007
- 2007-05-18 CN CN 200710022613 patent/CN101050894A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893344A (en) * | 2010-06-24 | 2010-11-24 | 中国科学院理化技术研究所 | Low-temperature liquefaction system for dual cycle of mixed working medium |
| CN101893344B (en) * | 2010-06-24 | 2012-08-15 | 中国科学院理化技术研究所 | Low-temperature liquefaction system for dual cycle of mixed working medium |
| CN102297512A (en) * | 2011-08-12 | 2011-12-28 | 侯全舵 | Cascade type heat pump system |
| CN104913541A (en) * | 2015-03-09 | 2015-09-16 | 浙江大学 | Stirling cycle and steam compression refrigeration cycle directly-coupled refrigerating machine and method |
| CN104913541B (en) * | 2015-03-09 | 2017-07-28 | 浙江大学 | Stirling cycle and the direct-coupled refrigeration machine of Vapor Compression Refrigeration Cycle and method |
| CN105823251A (en) * | 2016-06-05 | 2016-08-03 | 山东商业职业技术学院 | Honeycomb-type low-temperature quick cold charging system |
| CN109511272A (en) * | 2016-08-02 | 2019-03-22 | 三菱电机株式会社 | Heat pump assembly |
| CN109511272B (en) * | 2016-08-02 | 2020-10-30 | 三菱电机株式会社 | Heat pump device |
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