CN108332443B - Refrigerating system capable of realizing variable flow single-stage compression cycle and cascade cycle - Google Patents
Refrigerating system capable of realizing variable flow single-stage compression cycle and cascade cycle Download PDFInfo
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- CN108332443B CN108332443B CN201810235387.7A CN201810235387A CN108332443B CN 108332443 B CN108332443 B CN 108332443B CN 201810235387 A CN201810235387 A CN 201810235387A CN 108332443 B CN108332443 B CN 108332443B
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- 230000006835 compression Effects 0.000 title claims abstract description 27
- 238000007906 compression Methods 0.000 title claims abstract description 27
- 238000005057 refrigeration Methods 0.000 claims description 103
- 230000005494 condensation Effects 0.000 claims description 24
- 238000009833 condensation Methods 0.000 claims description 24
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 230000001276 controlling effect Effects 0.000 claims description 8
- 239000003507 refrigerant Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a refrigerating system capable of realizing variable flow single-stage compression cycle and cascade cycle, and aims to provide a system which is flexible and convenient to adjust and high in efficiency. The refrigerating compressor unit comprises a plurality of compressors, wherein the exhaust ends of the compressors are connected in parallel and then are divided into a first exhaust interface and a second exhaust interface, and the air suction ends of the compressors are connected in parallel and then are divided into a first air suction interface and a second air suction interface. The first exhaust interface is connected with a first inlet of the condensing evaporator, a first outlet of the condensing evaporator is connected with a first interface of the four-way reversing valve, and a fourth interface of the four-way reversing valve is connected with a first air suction interface through a first throttle valve and the evaporator; the second exhaust interface is connected with a third interface of the four-way reversing valve through a condenser, the second interface of the four-way reversing valve is connected with a second inlet of the condensing evaporator through a second throttle valve, and a second outlet of the condensing evaporator is connected with a second air suction interface. The system is convenient to adjust, simple in structure and high in efficiency.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigeration system capable of realizing variable flow single-stage compression cycle and cascade cycle.
Background
In order to reduce equipment investment of users, under the condition of the same refrigeration requirement, the same system is often adopted in winter and summer to meet the refrigeration requirements of different seasons through controlling the operation of the system.
In winter, the temperature difference between heat sources of the refrigeration system is smaller due to lower outdoor temperature, and the refrigeration requirement of lower temperature can be met through single-stage compression circulation. Generally, a multi-head parallel single-stage compression refrigeration cycle is adopted, and flow regulation is realized by controlling the number of compressors put into operation in a refrigeration compressor unit. However, since this adjustment is a stepwise adjustment, there are mainly the following problems: when the refrigerating capacity required to be increased is smaller than that of one compressor, if the operation of one compressor is increased, the refrigerating energy of the unit is overlarge, and the suction pressure is overlarge, so that the unit is stopped; when the refrigerating capacity required to be reduced is smaller than that of one compressor, if the operation of one compressor is reduced, the refrigerating energy of the refrigerating compressor unit cannot meet the refrigerating requirement, so that repeated starting and stopping of the compressor occur, the stability of the system is reduced, and the service life of the unit is influenced.
In summer, the outdoor environment temperature is higher, the temperature difference between heat sources of the refrigeration system is larger, and the single-stage compression refrigeration cycle is limited by the suction and discharge compression ratio of the compressor, so that the single-stage compression refrigeration cycle is not suitable for a low-temperature refrigeration system with the compression ratio being more than 12. In this case, a cascade refrigeration cycle may be employed. For an overlapping refrigeration cycle system, different refrigeration working media are adopted for high-temperature-level circulation and low-temperature-level circulation, and because the low-temperature working media are in a supercritical state at normal temperature, an expansion container is usually arranged in the low-temperature-level refrigeration cycle, the system structure is complex, and the variable-working-medium flow control is difficult to realize.
Disclosure of Invention
The invention aims at overcoming the technical defects in the prior art, and provides a refrigerating system which can realize the conversion between single-stage compression circulation and cascade circulation, is convenient for capacity adjustment, and has simple system and high efficiency.
The technical scheme adopted for realizing the purpose of the invention is as follows:
a refrigerating system capable of realizing variable flow single-stage compression cycle and cascade cycle comprises a refrigerating compressor unit, a four-way reversing valve, a condensing evaporator, a first throttle valve, a second throttle valve, a condenser and an evaporator; the refrigerating compressor unit comprises a plurality of compressors, wherein the exhaust end of each compressor is connected in parallel and then is divided into a first exhaust interface and a second exhaust interface, the air suction end of each compressor is connected in parallel and then is divided into a first air suction interface and a second air suction interface, and regulating valves are respectively connected in series between the air suction ends of two adjacent compressors and between the exhaust ends of two adjacent compressors; the first exhaust interface of the refrigeration compressor unit is connected with the first inlet of the condensation evaporator, the first outlet of the condensation evaporator is connected with the first interface of the four-way reversing valve, and the fourth interface of the four-way reversing valve is connected with the first air suction interface of the refrigeration compressor unit through the first throttle valve and the evaporator; the second exhaust interface of the refrigerating compressor unit is connected with the third interface of the four-way reversing valve through the condenser, the second interface of the four-way reversing valve is connected with the second inlet of the condensing evaporator through the second throttle valve, and the second outlet of the condensing evaporator is connected with the second air suction interface of the refrigerating compressor unit.
When the refrigerant is used as a single-stage compression refrigeration system, the first interface of the four-way reversing valve is connected with the second interface, the third interface is connected with the fourth interface, part of the refrigerant enters the condenser from the second exhaust interface of the refrigeration compressor unit to be condensed, and the condensed refrigerant returns to the refrigeration compressor unit through the four-way reversing valve, the first throttle valve, the evaporator and the second air suction interface of the refrigeration compressor unit to complete refrigeration cycle; simultaneously, the other part of compressed working medium enters the condensation evaporator through a first exhaust interface of the refrigeration compressor unit, returns to the refrigeration compressor unit through the four-way reversing valve, the second throttle valve and the first air suction port of the condensation evaporator and the refrigeration compressor unit, and realizes stepless energy adjustment through the opening adjustment of the second throttle valve.
When the four-way reversing valve is used as an cascade refrigeration system, the first interface of the four-way reversing valve is connected with the fourth interface, and the third interface is connected with the second interface; one part of the compressors in the refrigerating compressor unit is used as a high-temperature-stage compressor, and the other part of the compressors is used as a low-temperature-stage compressor; part of working medium enters the condensation evaporator through a first exhaust interface of the refrigeration compressor unit after being compressed, and the condensed working medium returns to the refrigeration compressor unit through the four-way reversing valve, the first throttle valve, the evaporator and a first suction interface of the refrigeration compressor unit to complete low-temperature-stage circulation; after being compressed, part of working medium enters the condenser through a second exhaust interface of the refrigeration compressor unit to be condensed, and the condensed working medium returns to the refrigeration compressor unit through a second throttle valve, a four-way reversing valve, a condensation evaporator and a second suction interface of the refrigeration compressor unit to complete high-temperature-stage circulation; the high-low temperature level variable flow rate regulation is realized by controlling the start and stop of a compressor in the refrigerating compressor unit and the start and stop of a group of regulating valves corresponding to the suction end and the exhaust end of the same compressor.
The compressor is any one of a scroll compressor, a rotor compressor, a screw compressor and a piston compressor.
The condenser is an air-cooled condenser, a water-cooled condenser or an evaporative condenser.
The condensing evaporator is a plate heat exchanger or a double-pipe heat exchanger.
The evaporator is air-cooled or solution-cooled.
The first throttle valve and the second throttle valve are electronic expansion valves, thermal expansion valves, capillary tubes or orifice plate throttle devices.
Compared with the prior art, the invention has the beneficial effects that:
1. the refrigeration system of the invention can be operated as a single-stage compression parallel refrigeration system in winter or as a cascade refrigeration system in summer. When the single-stage compression parallel refrigerating system is operated, each compressor forming the refrigerating compressor unit can realize the step regulation of energy through start-stop control, and the stepless regulation of energy can be realized through the opening regulation of the second throttle valve, so that the stability and the reliability of the operation of the system are ensured, and the service life of the system is prolonged. When the cascade refrigeration system is operated, each compressor in the refrigeration compressor unit can change the number of the high-temperature-level refrigeration compressors and the low-temperature-level refrigeration compressors which are put into operation through the opening and closing of a group of regulating valve groups corresponding to the corresponding compressors, namely any refrigeration compressor in the middle part of the refrigeration compressor unit can be used as the high-temperature-level refrigeration compressor or the low-temperature-level refrigeration compressor, so that the interstage energy regulation is convenient, and the system flexibility is strong.
2. When the refrigeration system is used as an overlapping refrigeration system, a single refrigeration working medium is adopted, devices such as an expansion container and the like are not needed, and the system structure is simple.
3. When the compressor works in winter, the unit is converted into a single-stage compression parallel system to operate, stepless regulation of energy can be realized through bypass regulation (namely, a second throttle valve), and stepped regulation of energy can be realized through start and stop of the compressor, so that the system has higher operation efficiency due to the stepless regulation and the stepped regulation of energy, and when the compressor works in summer, the unit is converted into an overlapping unit to operate, the control is realized by adopting a variable working medium flow mode, the working medium flow ratio of a high-temperature-level refrigerating system and a low-temperature-level refrigerating system is reasonable, and the system efficiency is high.
Drawings
FIG. 1 is a schematic diagram of a refrigeration system of the present invention that can implement a variable flow single stage compression cycle and an cascade cycle;
FIG. 2 is a schematic diagram of a refrigeration compressor unit;
fig. 3 is a schematic diagram of an interface of the four-way reversing valve.
Description of the embodiments
The invention will be described in detail below with reference to the drawings and the specific embodiments.
The invention discloses a refrigerating system capable of realizing variable flow single-stage compression cycle and cascade cycle, which is shown in fig. 1-3, and comprises a refrigerating compressor unit 1, a four-way reversing valve 2, a condensing evaporator 3, a first throttle valve 4-1, a second throttle valve 4-2, a condenser 5 and an evaporator 6. The refrigeration compressor unit 1 in this embodiment includes a plurality of compressors 7, wherein the exhaust end of each compressor 7 is divided into a first exhaust port 1-2 and a second exhaust port 1-3 after being connected in parallel, the suction end of each compressor 7 is divided into a first suction port 1-1 and a second suction port 1-4 after being connected in parallel, and regulating valves 8 are respectively connected in series between the suction ends of two adjacent compressors and between the exhaust ends of two adjacent compressors. The regulating valves 8 of the suction end and the discharge end corresponding to each compressor 7 are simultaneously opened or simultaneously closed. The first exhaust port 1-2 of the refrigeration compressor unit is connected with the first inlet of the condensation evaporator 3, the first outlet of the condensation evaporator 3 is connected with the first port 2-1 of the four-way reversing valve 2, and the fourth port 2-4 of the four-way reversing valve 2 is connected with the first air suction port 1-1 of the refrigeration compressor unit through the first throttle valve 4-1 and the evaporator 6. The second exhaust port 1-3 of the refrigeration compressor unit is connected with the third port 2-3 of the four-way reversing valve through the condenser 5, the second port 2-2 of the four-way reversing valve is connected with the second inlet of the condensation evaporator 3 through the second throttle valve 4-2, and the second outlet of the condensation evaporator 3 is connected with the second air suction port 1-4 of the refrigeration compressor unit.
When the refrigerating system is used as a single-stage compression refrigerating system, the first port 2-1 of the four-way reversing valve is connected with the second port 2-2, the third port 2-3 is connected with the fourth port 2-4, all regulating valves 8 in the refrigerating compressor unit are opened, and the second throttling valve 4-2 is used as a bypass pressure reducing valve. Part of working medium enters the condenser 5 from the second exhaust port 1-3 of the refrigeration compressor unit to be condensed, the condensed working medium enters the first throttle valve 4-1 through the four-way reversing valve, enters the evaporator 6 to be evaporated after being throttled by the first throttle valve 4-1, a refrigeration phenomenon is generated, and then the working medium returns to the refrigeration compressor unit 1 through the second air suction port 1-4 of the refrigeration compressor unit to complete refrigeration cycle, and the refrigeration compressor unit 1 realizes the step adjustment of energy through the start and stop of different compressors 7. Simultaneously, the other part of working medium enters the condensation evaporator 3 through the first exhaust interface 1-2 of the refrigeration compressor unit after being compressed, enters the second throttle valve 4-2 through the four-way reversing valve 2, enters the condensation evaporator after being depressurized through the second throttle valve 4-2, and then returns to the refrigeration compressor unit 1 through the first air suction port 1-1 of the refrigeration compressor unit, and stepless energy adjustment is realized through the opening adjustment of the second throttle valve.
When the refrigerating system is used as an overlapping refrigerating system, the first interface 2-1 of the four-way reversing valve is connected with the fourth interface 2-4, and the third interface 2-3 is connected with the second interface 2-2. Each compressor 7 in the refrigeration compressor unit 1 realizes variable flow adjustment of a high-low temperature level system through opening and closing of different adjusting valves 8, and any refrigeration compressor in the middle part of the refrigeration compressor unit can be used as a high-temperature level refrigeration compressor or a low-temperature level refrigeration compressor for conveniently adjusting interstage energy. And the regulating valve corresponding to the exhaust end and the suction end of each compressor is opened or closed at the same time. In the present embodiment, the right compressor 7 of the refrigeration compressor unit 1 serves as a high-temperature stage system compressor, and the left compressor 7 of the refrigeration compressor unit 1 serves as a low-temperature stage system compressor. During operation, part of working medium enters the condensation evaporator 3 through the first exhaust interface 1-2 of the refrigeration compressor unit after being compressed, dissipates heat to the high-temperature working medium, enters the first throttle valve 4-1 through the four-way reversing valve 2, enters the evaporator 6 after being throttled by the first throttle valve 4-1, evaporates to generate refrigeration, and returns to the refrigeration compressor unit through the first air suction interface 1-1 of the refrigeration compressor unit to complete low-temperature circulation. Part of working medium is compressed and then enters the condenser 5 for condensation through the second exhaust interface 1-3 of the refrigeration compressor unit, the condensed working medium enters the second throttle valve 4-2 through the four-way reversing valve, enters the condensation evaporator 3 after being throttled by the second throttle valve 4-2, absorbs the condensation heat of the low-temperature working medium, and returns to the refrigeration compressor unit through the second air suction interface 1-4 of the refrigeration compressor unit 1 to complete high-temperature circulation. The high-low temperature level variable flow rate regulation is realized by controlling the start and stop of a compressor in the refrigerating compressor unit and the start and stop of a group of regulating valves corresponding to the suction end and the exhaust end of the same compressor.
Wherein the compressor is any one of a scroll compressor, a rotor compressor, a screw compressor and a piston compressor.
The condenser is an air-cooled condenser, a water-cooled condenser or an evaporative condenser.
The condensing evaporator is a plate heat exchanger or a double-pipe heat exchanger.
The evaporator is air-cooled or solution-cooled.
The first throttle valve and the second throttle valve are electronic expansion valves, thermal expansion valves, capillary tubes or orifice plate throttle devices.
In the refrigerating system, the refrigerating compressor unit can be switched between a variable-flow single-stage compression parallel refrigerating system and a variable-flow cascade refrigerating system through the action of the four-way reversing valve. In the variable flow single-stage compression parallel refrigerating system, the energy is regulated in a step mode by controlling the start-stop number of compressors in the refrigerating compressor unit, and the stepless energy regulation is realized by controlling the opening of the second throttle valve. In the cascade refrigeration system, the flow change and interstage matching of the high-low temperature stage system can be realized by controlling the opening and closing of the regulating valve in the refrigeration compressor unit.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (6)
1. A refrigerating system capable of realizing variable flow single-stage compression cycle and cascade cycle is characterized by comprising a refrigerating compressor unit, a four-way reversing valve, a condensing evaporator, a first throttle valve, a second throttle valve, a condenser and an evaporator; the refrigerating compressor unit comprises a plurality of compressors, wherein the exhaust end of each compressor is connected in parallel and then is divided into a first exhaust interface and a second exhaust interface, the air suction end of each compressor is connected in parallel and then is divided into a first air suction interface and a second air suction interface, and regulating valves are respectively connected in series between the air suction ends of two adjacent compressors and between the exhaust ends of two adjacent compressors; the first exhaust interface of the refrigeration compressor unit is connected with the first inlet of the condensation evaporator, the first outlet of the condensation evaporator is connected with the first interface of the four-way reversing valve, and the fourth interface of the four-way reversing valve is connected with the first air suction interface of the refrigeration compressor unit through the first throttle valve and the evaporator; the second exhaust interface of the refrigeration compressor unit is connected with the third interface of the four-way reversing valve through the condenser, the second interface of the four-way reversing valve is connected with the second inlet of the condensation evaporator through the second throttle valve, and the second outlet of the condensation evaporator is connected with the second air suction interface of the refrigeration compressor unit;
when the refrigerant is used as a single-stage compression refrigeration system, the first interface of the four-way reversing valve is connected with the second interface, the third interface is connected with the fourth interface, part of the refrigerant enters the condenser from the second exhaust interface of the refrigeration compressor unit to be condensed, and the condensed refrigerant returns to the refrigeration compressor unit through the four-way reversing valve, the first throttle valve, the evaporator and the second air suction interface of the refrigeration compressor unit to complete refrigeration cycle; simultaneously, the other part of compressed working medium enters the condensation evaporator through a first exhaust interface of the refrigeration compressor unit, returns to the refrigeration compressor unit through the four-way reversing valve, the second throttle valve and a first air suction port of the condensation evaporator and the refrigeration compressor unit, and realizes stepless energy adjustment through the opening adjustment of the second throttle valve;
when the four-way reversing valve is used as an cascade refrigeration system, the first interface of the four-way reversing valve is connected with the fourth interface, and the third interface is connected with the second interface; one part of the compressors in the refrigerating compressor unit is used as a high-temperature-stage compressor, and the other part of the compressors is used as a low-temperature-stage compressor; part of working medium enters the condensation evaporator through a first exhaust interface of the refrigeration compressor unit after being compressed, and the condensed working medium returns to the refrigeration compressor unit through the four-way reversing valve, the first throttle valve, the evaporator and a first suction interface of the refrigeration compressor unit to complete low-temperature-stage circulation; after being compressed, part of working medium enters the condenser through a second exhaust interface of the refrigeration compressor unit to be condensed, and the condensed working medium returns to the refrigeration compressor unit through a second throttle valve, a four-way reversing valve, a condensation evaporator and a second suction interface of the refrigeration compressor unit to complete high-temperature-stage circulation; the high-low temperature level variable flow rate regulation is realized by controlling the start and stop of a compressor in the refrigerating compressor unit and the start and stop of a group of regulating valves corresponding to the suction end and the exhaust end of the same compressor.
2. The refrigeration system for implementing a variable flow single stage compression cycle and an cascade cycle of claim 1, wherein the compressor is any one of a scroll compressor, a rotor compressor, a screw compressor, and a piston compressor.
3. The refrigeration system for implementing a variable flow single stage compression cycle and cascade cycle of claim 1, wherein the condenser is an air cooled condenser, a water cooled condenser, or an evaporative condenser.
4. The refrigeration system for implementing a variable flow single stage compression cycle and cascade cycle of claim 1 wherein the condensing evaporator is a plate heat exchanger or a double pipe heat exchanger.
5. The refrigeration system of claim 1 wherein said evaporator is air-cooled or solution-cooled.
6. The refrigeration system for implementing a variable flow single stage compression cycle and cascade cycle of claim 1, wherein the first and second throttles are electronic expansion valves, thermal expansion valves, capillary tubes, or orifice plate throttles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810235387.7A CN108332443B (en) | 2018-03-21 | 2018-03-21 | Refrigerating system capable of realizing variable flow single-stage compression cycle and cascade cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810235387.7A CN108332443B (en) | 2018-03-21 | 2018-03-21 | Refrigerating system capable of realizing variable flow single-stage compression cycle and cascade cycle |
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| CN108332443A CN108332443A (en) | 2018-07-27 |
| CN108332443B true CN108332443B (en) | 2024-01-19 |
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| JP2008002711A (en) * | 2006-06-20 | 2008-01-10 | Daikin Ind Ltd | Refrigerating device |
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| CN205641653U (en) * | 2016-05-03 | 2016-10-12 | 天津商业大学 | Cascade refrigeration system of unsteady flow volume simplex matter sharing condenser and evaporimeter |
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| CN208091005U (en) * | 2018-03-21 | 2018-11-13 | 天津商业大学 | The refrigeration system of variable-flow single stage compress cycle and cascade cycle can be achieved |
-
2018
- 2018-03-21 CN CN201810235387.7A patent/CN108332443B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008002711A (en) * | 2006-06-20 | 2008-01-10 | Daikin Ind Ltd | Refrigerating device |
| CN103335440A (en) * | 2013-07-04 | 2013-10-02 | 天津商业大学 | Secondary throttling middle complete cooling double-working-condition refrigeration system |
| CN105783326A (en) * | 2016-05-03 | 2016-07-20 | 天津商业大学 | Variable-flow single-working-medium sharing heat exchanger overlapping heat pump system |
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| CN107024031A (en) * | 2017-05-27 | 2017-08-08 | 中原工学院 | A kind of three pressure high-efficiency air cooling source pumps suitable for the big temperature difference |
| CN208091005U (en) * | 2018-03-21 | 2018-11-13 | 天津商业大学 | The refrigeration system of variable-flow single stage compress cycle and cascade cycle can be achieved |
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| CN108332443A (en) | 2018-07-27 |
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