CN103335458A - Secondary throttling double-stage compression refrigeration system - Google Patents
Secondary throttling double-stage compression refrigeration system Download PDFInfo
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- CN103335458A CN103335458A CN201310278512XA CN201310278512A CN103335458A CN 103335458 A CN103335458 A CN 103335458A CN 201310278512X A CN201310278512X A CN 201310278512XA CN 201310278512 A CN201310278512 A CN 201310278512A CN 103335458 A CN103335458 A CN 103335458A
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Abstract
The invention discloses a secondary throttling double-stage compression refrigeration system which can achieve both secondary throttling middle incomplete cooling double-stage compression refrigeration circulation and secondary throttling middle complete cooling double-stage compression refrigeration circulation. An exhaust outlet of a low-pressure compressor is connected with an inlet of a first valve and an inlet of a second valve, an outlet of the first valve is connected with an inlet, under a liquid level, of an intercooler, an outlet of the second valve is connected with an air outlet of the intercooler in parallel, and then is connected with an air suction port of a high-pressure compressor, an exhaust outlet of the high-pressure compressor is connected with an inlet of a condenser, an outlet of the condenser is connected with the inlet of the intercooler through a second throttling valve, a liquid outlet of the intercooler is connected with an inlet of an evaporator through a first throttling valve, and an outlet of the evaporator is connected with an air suction port of the low-pressure compressor. The two circulation modes including the secondary throttling middle complete cooling double-stage compression refrigeration circulation and the secondary throttling middle incomplete cooling double-stage compression refrigeration circulation can be achieved through control over opening or closing of the first valve and the second valve.
Description
Technical field
The present invention relates to refrigeration technology field, particularly relate to and a kind ofly not only can realize in the middle of the second throttle cooling fully but also can realize in the middle of the second throttle the not exclusively double-stage compressive refrigerating system of cooling.
Background technology
Existing double-stage compressive refrigerating system endless form has four kinds, is respectively to cool off fully in the middle of the throttling to cool off not exclusively cooling twin-stage compression refrigeration circulation in the middle of twin-stage compression refrigeration circulation and the second throttle in the middle of not exclusively cooling twin-stage compression refrigeration circulation in the middle of twin-stage compression refrigeration circulation, the throttling, the second throttle fully.Wherein cooling off the twin-stage compression cycle fully in the middle of the throttling comprises: throttling twin-stage compression refrigeration circulation is two kinds after the cooling of cooling off fully in the middle of throttling twin-stage compression refrigeration circulation and the throttling before the cooling of the middle cooling fully of a throttling; Incomplete cooling twin-stage compression cycle also comprises in the middle of the throttling: the compression refrigeration of throttling twin-stage circulates two kinds after the preceding throttling twin-stage compression refrigeration circulation of cooling of the middle not exclusively cooling of a throttling and the cooling of the middle not exclusively cooling of a throttling.
Circulate with the compression refrigeration of second throttle twin-stage for teaching and test, usually adopt a certain double-stage compressive refrigerating system in the above-mentioned second throttle mode to realize single circulation, when needs not relatively teaching or when test of circulating effect of the same race, need set up the circulatory system respectively, be unfavorable for the mutual comparison between the multiple twin-stage compression cycle, simultaneously, because system's Different Effects experiment or precision of test result, and the system cost height.
Summary of the invention
The objective of the invention is at the technological deficiency that exists in the prior art, both can realize that the middle not exclusively cooling of second throttle twin-stage compression refrigeration circulation can realize cooling off the double-stage compressive refrigerating system that twin-stage compression refrigeration circulates fully in the middle of the second throttle and provide a kind of.
For realizing that the technical scheme that purpose of the present invention adopts is:
A kind of second throttle double-stage compressive refrigerating system, by low pressure compressor, high pressure compressor, evaporimeter, the first throttle valve, second choke valve, first valve, second valve, condenser and intercooler are formed, described low pressure compressor exhaust outlet is connected with described second valve inlet with described first valve inlet respectively, described first valve export is connected with described intercooler liquid level lower inlet, be connected with described high pressure compressor air entry after described second valve export and the parallel connection of described intercooler gas vent, described high pressure compressor exhaust outlet is connected with described condenser inlet, described condensator outlet is connected with described intercooler import through described second choke valve, described intercooler liquid outlet is connected with described evaporator through described first throttle valve, and described evaporator outlet is connected with described low pressure compressor air entry; Unlatching by controlling described first valve and second valve or close realizes cooling off fully in the middle of the second throttle in the middle of twin-stage compression refrigeration circulation and the second throttle not exclusively two kinds of endless form of cooling twin-stage compression refrigeration circulation.
Described first throttle valve and second choke valve are electric expansion valve, heating power expansion valve, capillary or orifice plate.
Described intercooler is plate type heat exchanger or double pipe heat exchanger.
Compared with prior art, the invention has the beneficial effects as follows:
In the second throttle double-stage compressive refrigerating system of the present invention, exhaust outlet at low pressure compressor is connected in parallel to first valve and second valve, unlatching by controlling first valve and second valve or close, can realize cooling off twin-stage compression refrigeration circulation and two kinds of endless form of the middle not exclusively cooling of second throttle twin-stage compression refrigeration circulation fully in the middle of the second throttle, when needs not relatively teaching or when test of circulating effect of the same race, can use a system to realize multiple circulation, be conducive to the mutual comparison between two kinds of twin-stage compression cycle, experiment or precision of test result are higher, and reduced system cost, saved investment.
Description of drawings
Figure 1 shows that the schematic diagram of second throttle double-stage compressive refrigerating system of the present invention.
Among the figure: 1. low pressure compressor, 2. high pressure compressor, 3. evaporimeter, 4-1. first throttle valve, 4-2. second choke valve, 5-1. first valve, 5-2. second valve, 6. condenser, 7. intercooler.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Figure 1 shows that second throttle double-stage compressive refrigerating system schematic diagram of the present invention, comprise low pressure compressor 1, high pressure compressor 2, evaporimeter 3, first throttle valve 4-1, the second choke valve 4-2, the first valve 5-1, the second valve 5-2, condenser 6 and intercooler 7.Described low pressure compressor 1 exhaust outlet is connected with the described second valve 5-2 import with the described first valve 5-1 import respectively, described first valve 5-1 outlet is connected with described intercooler 7 liquid level lower inlets, be connected with described high pressure compressor 2 air entries after described second valve 5-2 outlet and the described intercooler 7 gas vent parallel connections, described high pressure compressor 2 exhaust outlets are connected with described condenser 6 imports, described condenser 6 outlets are connected with described intercooler 7 imports through the described second choke valve 4-2, described intercooler 7 liquid outlets are connected with evaporimeter 3 imports through described first throttle valve 4-1, and evaporimeter 3 outlets are connected with described low pressure compressor 1 air entry.
Second throttle double-stage compressive refrigerating system of the present invention can be realized cooling off twin-stage compression refrigeration circulation and two kinds of endless form of the middle not exclusively cooling of second throttle twin-stage compression refrigeration circulation fully in the middle of the second throttle.
1, cools off twin-stage compression refrigeration circulation in the middle of the second throttle fully
The second valve 5-2 closes, and the first valve 5-1 opens.In low pressure compressor 1, carry out the one-level compression by the low-pressure steam cold-producing medium after evaporimeter 3 evaporations, middle pressure superheated vapor cold-producing medium after the compression through the first valve 5-1 in intercooler 7 by liquid cools to middle pressure saturation state, from middle cooler 7 gas vents come out pressure saturated vapor cold-producing medium enter and carry out second level compression in the high pressure compressor 2, high pressure superheater vaporous cryogen condensation in condenser 6 after the compression, the throttling in the second choke valve 4-2 of condensed high pressure liquid refrigerant is to enter in the intercooler 7 after the saturated gas-liquid two phase refrigerant of middle pressure, press the saturated vapor cold-producing medium to participate in the secondary compression wherein, the press liquid cold-producing medium comes out from middle cooler 7 liquid outlets in all the other, throttling is to enter evaporation in the evaporimeter 3 after the saturated gas-liquid two phase refrigerant of low pressure in first throttle valve 4-1, finishes kind of refrigeration cycle.
2, not exclusively cooling twin-stage compression refrigeration circulation in the middle of the second throttle
The first valve 5-1 closes, and the second valve 5-2 opens.In low pressure compressor 1, carry out the one-level compression by the low-pressure steam cold-producing medium after evaporimeter 3 evaporations, middle pressure superheated vapor cold-producing medium after the compression through the second valve 5-2 with come out from middle cooler 7 gas vents pressure saturated vapor refrigerant mixed be that middle pressure superheated vapor cold-producing medium enters and carries out secondary compression in the high pressure compressor 2, high pressure superheater vaporous cryogen condensation in condenser 6 after the compression, the throttling in the second choke valve 4-2 of condensed high pressure liquid refrigerant is to enter in the intercooler 7 after the saturated gas-liquid two phase refrigerant of middle pressure, press the saturated vapor cold-producing medium to participate in the secondary compression wherein, the press liquid cold-producing medium comes out from middle cooler 7 liquid outlets in all the other, throttling is to enter evaporation in the evaporimeter 3 after the saturated gas-liquid two phase refrigerant of low pressure in first throttle valve 4-1, finishes kind of refrigeration cycle.
High pressure compressor of the present invention and low pressure compressor are any in screw compressor, rotor compressor, helical-lobe compressor, the piston compressor.Described condenser and evaporimeter are air-cooled or water-cooled.Described choke valve is any in electric expansion valve, heating power expansion valve, capillary or the orifice plate throttling, but also can be the throttling arrangement of other step-down power.Described intercooler can be plate type heat exchanger, double pipe heat exchanger or other pattern heat exchanger.Described valve can be ball valve, gate valve or other pattern valve, can replace with magnetic valve, also can use triple valve, cross valve to replace.
The above only is preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. second throttle double-stage compressive refrigerating system, it is characterized in that, by low pressure compressor, high pressure compressor, evaporimeter, the first throttle valve, second choke valve, first valve, second valve, condenser and intercooler are formed, described low pressure compressor exhaust outlet is connected with described second valve inlet with described first valve inlet respectively, described first valve export is connected with described intercooler liquid level lower inlet, be connected with described high pressure compressor air entry after described second valve export and the parallel connection of described intercooler gas vent, described high pressure compressor exhaust outlet is connected with described condenser inlet, described condensator outlet is connected with described intercooler import through described second choke valve, described intercooler liquid outlet is connected with described evaporator through described first throttle valve, and described evaporator outlet is connected with described low pressure compressor air entry; Unlatching by controlling described first valve and second valve or close realizes cooling off fully in the middle of the second throttle in the middle of twin-stage compression refrigeration circulation and the second throttle not exclusively two kinds of endless form of cooling twin-stage compression refrigeration circulation.
2. second throttle double-stage compressive refrigerating system according to claim 1 is characterized in that, described first throttle valve and second choke valve are electric expansion valve, heating power expansion valve, capillary or orifice plate.
3. second throttle double-stage compressive refrigerating system according to claim 1 is characterized in that, described intercooler is plate type heat exchanger or double pipe heat exchanger.
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| CN201310278512XA CN103335458A (en) | 2013-07-04 | 2013-07-04 | Secondary throttling double-stage compression refrigeration system |
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| CN201310278512XA CN103335458A (en) | 2013-07-04 | 2013-07-04 | Secondary throttling double-stage compression refrigeration system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387645A (en) * | 2015-12-17 | 2016-03-09 | 重庆美的通用制冷设备有限公司 | Water chilling unit and control method thereof |
| CN107631509A (en) * | 2017-10-31 | 2018-01-26 | 吴家伟 | Two-stage refrigerating system is cooled down completely among a kind of three-level throttling of the double flash vessels of band |
| CN113137774A (en) * | 2021-05-13 | 2021-07-20 | 上海海洋大学 | Software-combined two-stage compression refrigeration cycle thermodynamic analysis method |
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| JP2001133058A (en) * | 1999-11-05 | 2001-05-18 | Matsushita Electric Ind Co Ltd | Refrigeration cycle |
| JP2005214442A (en) * | 2004-01-27 | 2005-08-11 | Sanyo Electric Co Ltd | Refrigerator |
| JP2006153298A (en) * | 2004-11-25 | 2006-06-15 | Mitsubishi Heavy Ind Ltd | Two-stage compression refrigerating system |
| CN101012618A (en) * | 2006-01-20 | 2007-08-08 | 三洋电机株式会社 | Drying machine |
| CN101688696A (en) * | 2007-04-24 | 2010-03-31 | 开利公司 | Refrigerant vapor compression system and method of transcritical operation |
| CN203454485U (en) * | 2013-07-04 | 2014-02-26 | 天津商业大学 | Secondary throttling two-stage compression refrigeration system |
-
2013
- 2013-07-04 CN CN201310278512XA patent/CN103335458A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001133058A (en) * | 1999-11-05 | 2001-05-18 | Matsushita Electric Ind Co Ltd | Refrigeration cycle |
| JP2005214442A (en) * | 2004-01-27 | 2005-08-11 | Sanyo Electric Co Ltd | Refrigerator |
| JP2006153298A (en) * | 2004-11-25 | 2006-06-15 | Mitsubishi Heavy Ind Ltd | Two-stage compression refrigerating system |
| CN101012618A (en) * | 2006-01-20 | 2007-08-08 | 三洋电机株式会社 | Drying machine |
| CN101688696A (en) * | 2007-04-24 | 2010-03-31 | 开利公司 | Refrigerant vapor compression system and method of transcritical operation |
| CN203454485U (en) * | 2013-07-04 | 2014-02-26 | 天津商业大学 | Secondary throttling two-stage compression refrigeration system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387645A (en) * | 2015-12-17 | 2016-03-09 | 重庆美的通用制冷设备有限公司 | Water chilling unit and control method thereof |
| CN107631509A (en) * | 2017-10-31 | 2018-01-26 | 吴家伟 | Two-stage refrigerating system is cooled down completely among a kind of three-level throttling of the double flash vessels of band |
| CN113137774A (en) * | 2021-05-13 | 2021-07-20 | 上海海洋大学 | Software-combined two-stage compression refrigeration cycle thermodynamic analysis method |
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Application publication date: 20131002 |