CN103322713A - Four-cycle double-stage compression refrigeration system - Google Patents
Four-cycle double-stage compression refrigeration system Download PDFInfo
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- CN103322713A CN103322713A CN2013102784080A CN201310278408A CN103322713A CN 103322713 A CN103322713 A CN 103322713A CN 2013102784080 A CN2013102784080 A CN 2013102784080A CN 201310278408 A CN201310278408 A CN 201310278408A CN 103322713 A CN103322713 A CN 103322713A
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Abstract
The invention discloses a four-cycle double-stage compression refrigeration system. The four-cycle double-stage compression refrigeration system is characterized in that an exhaust port of a low-pressure compressor is connected with a first valve and a second valve, the first valve is connected with an undersurface inlet of an inter-cooler, an outlet of the second valve and a shell-side air outlet of the inter-cooler are connected with each other in parallel and then are connected with an air suction port of a high-pressure compressor, an exhaust port of the high-pressure compressor is connected with an inlet of a condenser, an outlet of the condenser is connected with an inlet of a third valve and a tube-side inlet of the inter-cooler, a tube-side outlet of the inter-cooler is connected with an inlet of a fourth valve and an inlet of a fifth valve, an outlet of the third valve and an outlet of the fourth valve are connected with each other in parallel and then are connected with a shell-side inlet of the inter-cooler by a second throttling valve, a shell-side liquid outlet of the inter-cooler is connected with an inlet of a sixth valve, and an outlet of the fifth valve and an outlet of the sixth valve are connected with each other in parallel and then are connected with an inlet of an evaporator by a first throttling valve. The four-cycle double-stage compression refrigeration system has the advantage that primary throttling double-stage compression refrigeration cycles and secondary throttling double-stage compression refrigeration cycles can be implemented.
Description
Technical field
The present invention relates to refrigeration technology field, particularly relate to a kind of refrigeration system that not only can realize a throttling Two-stage Compression kind of refrigeration cycle but also can realize second throttle Two-stage Compression kind of refrigeration cycle.
Background technology
Having the double-stage compressive refrigerating system endless form now has four kinds, is respectively middle Two-stage Compression kind of refrigeration cycle, the middle not exclusively cooling of throttling Two-stage Compression kind of refrigeration cycle, middle Two-stage Compression kind of refrigeration cycle and the middle incomplete cooling Two-stage Compression kind of refrigeration cycle of second throttle cooled off fully of second throttle cooled off fully of a throttling.Wherein cooling off the Two-stage Compression circulation in the middle of the throttling fully comprises: complete complete two kinds of throttling Two-stage Compression kind of refrigeration cycle after the cooling of cooling in the middle of throttling Two-stage Compression kind of refrigeration cycle and the throttling before the cooling of cooling in the middle of the throttling; In the middle of the throttling not exclusively the circulation of cooling Two-stage Compression also comprise: incomplete incomplete two kinds of throttling Two-stage Compression kind of refrigeration cycle after the cooling of cooling in the middle of throttling Two-stage Compression kind of refrigeration cycle and the throttling before the cooling of cooling in the middle of the throttling.
For teaching and test with throttling Two-stage Compression kind of refrigeration cycle and second throttle Two-stage Compression kind of refrigeration cycle, usually adopt a certain double-stage compressive refrigerating system to realize single circulation, when needs not comparative pedagogy or when test of circulating effect of the same race, need to set up respectively the circulatory system, be unfavorable for the mutual comparison between the multiple Two-stage Compression circulation, simultaneously, because the accuracy of system's Different Effects experiment or test result, and system cost is high.
Summary of the invention
The objective of the invention is for the blank that exists in the prior art, a kind of throttling Two-stage Compression kind of refrigeration cycle that both can realize a time is provided, can realize again four circulation double-stage compressive refrigerating systems of second throttle Two-stage Compression kind of refrigeration cycle.
For realizing that the technical scheme that purpose of the present invention adopts is:
A kind of four circulation double-stage compressive refrigerating systems are comprised of low pressure compressor, high pressure compressor, evaporimeter, first throttle valve, the second choke valve, the first valve, the second valve, the 3rd valve, the 4th valve, the 5th valve, the 6th valve, condenser and intercooler; Described low pressure compressor exhaust outlet respectively with described the first valve inlet be connected the second valve inlet and be connected, described the first valve export is connected with described intercooler liquid level lower inlet, be connected with described high pressure compressor air entry after described the second valve export and the parallel connection of described intercooler shell-side gas vent, described high pressure compressor exhaust outlet is connected with described condenser inlet, described condensator outlet respectively with described the 3rd valve inlet be connected the side-entrance of intercooler pipe and be connected, described intercooler pipe side outlet respectively with described the 4th valve inlet be connected the 5th valve inlet and be connected, described the 3rd valve export be connected the 4th valve export parallel connection and be connected with described intercooler shell-side inlet by described the second choke valve, described intercooler shell-side liquid outlet is connected with described the 6th valve inlet, described the 5th valve export be connected the 6th valve export parallel connection and be connected with described evaporator by described first throttle valve, described evaporator outlet is connected with described low pressure compressor air entry; Unlatching by controlling described the first valve, the second valve, the 3rd valve, the 4th valve, the 5th valve and the 6th valve or close realizes cooling off fully in the middle of the throttling in the middle of Two-stage Compression kind of refrigeration cycle, the throttling not exclusively cools off in the middle of Two-stage Compression kind of refrigeration cycle and the second throttle not exclusively cooling Two-stage Compression kind of refrigeration cycle in the middle of cooling Two-stage Compression kind of refrigeration cycle, the second throttle fully.
Described choke valve is 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 four circulation double-stage compressive refrigerating systems of the present invention, exhaust outlet at low pressure compressor is connected in parallel to the first valve and the second valve, and at the distinct interface mounted valve of intercooler, different connected modes by a plurality of valves and control the unlatching of a plurality of valves or close, can realize simultaneously all endless form of Two-stage Compression kind of refrigeration cycle, when needs not comparative pedagogy 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 the multiple Two-stage Compression circulation, the accuracy of experiment or test result is higher, and reduced system cost, saved investment.
Description of drawings
Figure 1 shows that the present invention's four circulation double-stage compressive refrigerating system schematic diagrames.
Among the figure: 1. low pressure compressor, 2. high pressure compressor, 3. evaporimeter, 4-1. first throttle valve, 4-2. the second choke valve, 5-1. the first valve, 5-2. the second valve, 5-3. the 3rd valve, 5-4. the 4th valve, 5-5. the 5th valve, 5-6. the 6th 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 the present invention's four circulation double-stage compressive refrigerating system schematic diagrames, formed by 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, the 3rd valve 5-3, the 4th valve 5-4, the 5th valve 5-5, the 6th valve 5-6, condenser 6 and intercooler 7.Described low pressure compressor 1 exhaust outlet respectively with described the first valve 5-1 import be connected the second valve 5-2 import and be connected, described the 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 the second valve 5-2 outlet and the described intercooler 7 shell-side gas vent parallel connections, described high pressure compressor 2 exhaust outlets are connected with described condenser 6 imports, 6 outlets of described condenser respectively with described the 3rd valve 5-3 be connected intercooler 7 pipe side-entrances and be connected, described intercooler 7 pipe side outlets respectively with described the 4th valve 5-4 import be connected the 5th valve 5-5 import and be connected, described the 3rd valve 5-3 be connected that the 4th valve 5-4 outlet is in parallel to be connected with described intercooler 7 shell-side inlet through described the second choke valve 4-2 simultaneously, described intercooler 7 shell-side liquid outlets are connected with described the 6th valve 5-6 import, described the 5th valve 5-5 outlet and be connected that the 6th valve 5-6 outlet is in parallel to be connected with described evaporimeter 3 imports through described first throttle valve 4-1 simultaneously, described evaporimeter 3 exports and is connected with described low pressure compressor 1 air entry.Unlatching by controlling described the first valve 5-1, the second valve 5-2, the 3rd valve 5-3, the 4th valve 5-4, the 5th valve 5-5 and the 6th valve 5-6 or close realizes cooling off fully in the middle of the throttling in the middle of Two-stage Compression kind of refrigeration cycle, the throttling not exclusively cools off in the middle of Two-stage Compression kind of refrigeration cycle and the second throttle not exclusively cooling Two-stage Compression kind of refrigeration cycle in the middle of cooling Two-stage Compression kind of refrigeration cycle, the second throttle fully.
The present invention is a four cycle two-stage compression refrigeration system to cool the intermediate throttle to achieve a two-stage compression refrigeration cycle (including a cooling throttle fully cooled before the middle of two-stage compression refrigeration cycle throttle and a throttle fully for cooling the intermediate after the two-stage compression refrigeration cycle throttle), a throttling is not completely cooled intermediate two-stage compression refrigeration cycle (including a throttle for cooling the middle of the incomplete front throttle two-stage compression refrigeration cycle, and a throttle is not completely cooled intermediate after cooling throttling two-stage compression refrigeration cycle), intermediate secondary throttle completely cooled two-stage compression refrigeration cycle, and the secondary throttle middle without completely cooled two-stage compression refrigeration cycle works as follows:
1, cools off the Two-stage Compression kind of refrigeration cycle in the middle of the throttling fully
Throttling Two-stage Compression kind of refrigeration cycle before the cooling of cooling off fully in the middle of (1) throttling
The second valve 5-2, the 4th valve 5-4 and the 6th valve 5-6 close, and the first valve 5-1, the 3rd valve 5-3 and the 5th valve 5-5 open.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 9 shell-side gas vents 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, condensed high pressure liquid refrigerant is divided into two parts, part high pressure liquid refrigerant enters in the intercooler 7 after the 3rd valve 5-3 throttling in the second choke valve 4-2 is the saturated gas-liquid two phase refrigerant of middle pressure, cool stream through the side-entrances of intercooler 7 pipe enter to the high pressure liquid refrigerant of managing side outlet with from middle cooler 7 liquid levels below import intercooler 7 pressure superheated vapor cold-producing medium, another part high pressure liquid refrigerant is entered by intercooler 7 pipe side-entrances and is cooled to the high-pressure sub-cooled liquid cold-producing medium in the intercooler 7, the high-pressure sub-cooled liquid cold-producing medium from middle cooler 7 pipe side outlets out enters to evaporate in the evaporimeter 3 after the 5th valve 5-5 throttling in first throttle valve 4-1 is the saturated gas-liquid two phase refrigerant of low pressure and finishes circulation.
Throttling Two-stage Compression kind of refrigeration cycle after the cooling of cooling off fully in the middle of (2) throttlings
The second valve 5-2, the 3rd valve 5-3 and the 6th valve 5-6 close, and the first valve 5-1, the 4th valve 5-4 and the 5th valve 5-5 open.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 shell-side gas vents 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, condensed high pressure liquid refrigerant enters from middle cooler 7 pipe side-entrances and is cooled to the high-pressure sub-cooled liquid cold-producing medium the intercooler 7, be divided into two parts from middle cooler 7 pipe side outlets high-pressure sub-cooled liquid cold-producing medium out, part high-pressure sub-cooled liquid cold-producing medium enters in the intercooler 7 after the 4th valve 5-4 throttling in the second choke valve 4-2 is the saturated gas-liquid two phase refrigerant of middle pressure, cool stream through intercooler 7 pipe side-entrances enter to the high pressure liquid refrigerant of managing side outlet with from middle cooler 7 liquid levels below import intercooler 7 pressure superheated vapor cold-producing medium; Another part high-pressure sub-cooled liquid cold-producing medium enters evaporation in the evaporimeter 3 after the 5th valve 5-5 throttling in first throttle valve 4-1 is the saturated gas-liquid two phase refrigerant of low pressure, finish kind of refrigeration cycle.
2, not exclusively cool off the Two-stage Compression kind of refrigeration cycle in the middle of the throttling
Throttling Two-stage Compression kind of refrigeration cycle before the cooling of not exclusively cooling off in the middle of (1) throttling
The first valve 5-1, the 4th valve 5-4 and the 6th valve 5-6 close, and the second valve 5-2, the 3rd valve 5-3 and the 5th valve 5-5 open.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 from middle cooler 7 shell-side gas vents out pressure saturated vapor refrigerant mixed be that middle pressure superheated vapor cold-producing medium enters and carries out two-stage compression in the high pressure compressor 2, high pressure superheater vaporous cryogen condensation in condenser 6 after the compression, condensed high pressure liquid refrigerant is divided into two parts, part high pressure liquid refrigerant enters in the intercooler 7 after the 3rd valve 5-3 throttling in the second choke valve 4-2 is the saturated gas-liquid two phase refrigerant of middle pressure, to the high pressure liquid refrigerant of managing side outlet, the middle pressure saturated vapor cold-producing medium in the intercooler 7 participates in two-stage compression to cool stream through intercooler 7 pipe side-entrances; Another part high pressure liquid refrigerant is entered by intercooler 7 pipe side-entrances and is cooled to the high-pressure sub-cooled liquid cold-producing medium in the intercooler 7, the high-pressure sub-cooled liquid cold-producing medium from middle cooler 7 pipe side outlets out, after the 5th valve 5-5 throttling in first throttle valve 4-1 is the saturated gas-liquid two phase refrigerant of low pressure, enter evaporation in the evaporimeter 3, finish kind of refrigeration cycle.
Throttling Two-stage Compression kind of refrigeration cycle after the cooling of not exclusively cooling off in the middle of (2) throttlings
The first valve 5-1, the 3rd valve 5-3 and the 6th valve 5-6 close, and the second valve 5-2, the 4th valve 5-4 and the 5th valve 5-5 open.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 from middle cooler 7 shell-side gas vents out pressure saturated vapor refrigerant mixed be that middle pressure superheated vapor cold-producing medium enters and carries out two-stage compression in the high pressure compressor 2, high pressure superheater vaporous cryogen condensation in condenser 6 after the compression, condensed high pressure liquid refrigerant enters from middle cooler 7 pipe side-entrances and is cooled to the high-pressure sub-cooled liquid cold-producing medium the intercooler 7, be divided into two parts from middle cooler 7 pipe side outlets high-pressure sub-cooled liquid cold-producing medium out, part high-pressure sub-cooled liquid cold-producing medium enters in the intercooler 7 after the 4th valve 5-4 throttling in the second choke valve 4-2 is the saturated gas-liquid two phase refrigerant of middle pressure, to the high pressure liquid refrigerant of managing side outlet, wherein the middle saturated vapor cold-producing medium of pressing participates in two-stage compression to cool stream through intercooler 7 pipe side-entrances; All the other high-pressure sub-cooled liquid cold-producing mediums enter evaporation in the evaporimeter 3 after the 5th valve 5-5 throttling in first throttle valve 4-1 is the saturated gas-liquid two phase refrigerant of low pressure, finish kind of refrigeration cycle.
3, cool off the Two-stage Compression kind of refrigeration cycle in the middle of the second throttle fully
The second valve 5-2, the 4th valve 5-4 and the 5th valve 5-5 close, and the first valve 5-1, the 3rd valve 5-3 and the 6th valve 5-6 open.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 shell-side gas vents 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, condensed high pressure liquid refrigerant enters in the intercooler 7 after the 3rd valve 5-3 throttling in the second choke valve 4-2 is the saturated gas-liquid two phase refrigerant of middle pressure, press the saturated vapor cold-producing medium to participate in two-stage compression wherein, the press liquid cold-producing medium from middle cooler 7 liquid outlets out in all the other, after the 6th valve 5-6 throttling in first throttle valve 4-1 is the saturated gas-liquid two phase refrigerant of low pressure, enter evaporation in the evaporimeter 3, finish kind of refrigeration cycle.
4, not exclusively cool off the Two-stage Compression kind of refrigeration cycle in the middle of the second throttle
The first valve 5-1, the 4th valve 5-4 and the 5th valve 5-5 close, and the second valve 5-2, the 3rd valve 5-3 and the 6th valve 5-6 open.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 from middle cooler 7 shell-side gas vents out pressure saturated vapor refrigerant mixed be that middle pressure superheated vapor cold-producing medium enters and carries out two-stage compression in the high pressure compressor 2, high pressure superheater vaporous cryogen condensation in condenser 6 after the compression, condensed high pressure liquid refrigerant enters in the intercooler 7 after the 3rd valve 5-3 throttling in the second choke valve 4-2 is the saturated gas-liquid two phase refrigerant of middle pressure, press the saturated vapor cold-producing medium to participate in two-stage compression wherein, the press liquid cold-producing medium from middle cooler 7 liquid outlets out in all the other, after the 6th valve 5-6 throttling in first throttle valve 4-1 is the saturated gas-liquid two phase refrigerant of low pressure, enter evaporation in the evaporimeter 3, finish kind of refrigeration cycle.
High pressure compressor of the present invention and low pressure compressor be screw compressor, rotor compressor, helical-lobe compressor, piston compressor any, or other pattern compressor.Described condenser and evaporimeter are air-cooled, water-cooled or other pattern.Described choke valve is any in electric expansion valve, heating power expansion valve, capillary or the orifice throttle, 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. circulation double-stage compressive refrigerating system, it is characterized in that, formed by low pressure compressor, high pressure compressor, evaporimeter, first throttle valve, the second choke valve, the first valve, the second valve, the 3rd valve, the 4th valve, the 5th valve, the 6th valve, condenser and intercooler; Described low pressure compressor exhaust outlet respectively with described the first valve inlet be connected the second valve inlet and be connected, described the first valve export is connected with described intercooler liquid level lower inlet, be connected with described high pressure compressor air entry after described the second valve export and the parallel connection of described intercooler shell-side gas vent, described high pressure compressor exhaust outlet is connected with described condenser inlet, described condensator outlet respectively with described the 3rd valve inlet be connected the side-entrance of intercooler pipe and be connected, described intercooler pipe side outlet respectively with described the 4th valve inlet be connected the 5th valve inlet and be connected, described the 3rd valve export be connected the 4th valve export parallel connection and be connected with described intercooler shell-side inlet by described the second choke valve, described intercooler shell-side liquid outlet is connected with described the 6th valve inlet, described the 5th valve export be connected the 6th valve export parallel connection and be connected with described evaporator by described first throttle valve, described evaporator outlet is connected with described low pressure compressor air entry; Unlatching by controlling described the first valve, the second valve, the 3rd valve, the 4th valve, the 5th valve and the 6th valve or close realizes cooling off fully in the middle of the throttling in the middle of Two-stage Compression kind of refrigeration cycle, the throttling not exclusively cools off in the middle of Two-stage Compression kind of refrigeration cycle and the second throttle not exclusively cooling Two-stage Compression kind of refrigeration cycle in the middle of cooling Two-stage Compression kind of refrigeration cycle, the second throttle fully.
2. four circulation double-stage compressive refrigerating systems according to claim 1 is characterized in that, described choke valve is electric expansion valve, heating power expansion valve, capillary or orifice plate.
3. four circulation double-stage compressive refrigerating systems according to claim 1 and 2 is characterized in that, described intercooler is plate type heat exchanger or double pipe heat exchanger.
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| CN201310278408.0A CN103322713B (en) | 2013-07-04 | 2013-07-04 | Four-cycle double-stage compression refrigeration system |
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| CN201310278408.0A CN103322713B (en) | 2013-07-04 | 2013-07-04 | Four-cycle double-stage compression refrigeration system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843020A (en) * | 2017-12-08 | 2018-03-27 | 天津商业大学 | A kind of Trans-critical cycle CO2Two-stage Compression is pressurized refrigeration system |
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| CN201811498U (en) * | 2010-09-29 | 2011-04-27 | 中原工学院 | Double heat source type multi-compression high temperature heat pump |
| CN102654324A (en) * | 2012-05-24 | 2012-09-05 | 东华大学 | Twin-stage compression heat pump system with hot gas bypass defrosting device |
| CN203454449U (en) * | 2013-07-04 | 2014-02-26 | 天津商业大学 | Four-cycle two-stage compression refrigerating system |
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2013
- 2013-07-04 CN CN201310278408.0A patent/CN103322713B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5103650A (en) * | 1991-03-29 | 1992-04-14 | General Electric Company | Refrigeration systems with multiple evaporators |
| JPH04313647A (en) * | 1991-04-10 | 1992-11-05 | Matsushita Electric Ind Co Ltd | Heat pump type air conditioner |
| CN200940968Y (en) * | 2006-08-07 | 2007-08-29 | 北京市京科伦冷冻设备有限公司 | Refrigeration unit structure |
| CN201811498U (en) * | 2010-09-29 | 2011-04-27 | 中原工学院 | Double heat source type multi-compression high temperature heat pump |
| CN102654324A (en) * | 2012-05-24 | 2012-09-05 | 东华大学 | Twin-stage compression heat pump system with hot gas bypass defrosting device |
| CN203454449U (en) * | 2013-07-04 | 2014-02-26 | 天津商业大学 | Four-cycle two-stage compression refrigerating system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107843020A (en) * | 2017-12-08 | 2018-03-27 | 天津商业大学 | A kind of Trans-critical cycle CO2Two-stage Compression is pressurized refrigeration system |
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