CN112710098A - Air supplementing device and method for single-screw refrigeration compressor coupled with composite slide valve under partial load - Google Patents
Air supplementing device and method for single-screw refrigeration compressor coupled with composite slide valve under partial load Download PDFInfo
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- CN112710098A CN112710098A CN202110060204.4A CN202110060204A CN112710098A CN 112710098 A CN112710098 A CN 112710098A CN 202110060204 A CN202110060204 A CN 202110060204A CN 112710098 A CN112710098 A CN 112710098A
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- compressor
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- subcooler
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- 230000001502 supplementing effect Effects 0.000 title claims abstract description 34
- 239000002131 composite material Substances 0.000 title claims abstract description 18
- 238000005057 refrigeration Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000013589 supplement Substances 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims description 17
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 description 8
- 239000003507 refrigerant Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
Images
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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
- F25B1/047—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of screw type
-
- 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
- F25B31/00—Compressor arrangements
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
A gas supplementing device and a gas supplementing method for a single-screw refrigeration compressor coupled with a composite slide valve under partial load belong to the field of air conditioner and heat pump engineering. The outlet of the compressor (1) is connected with the inlet of the cooler (2), the outlet of the cooler (2) is connected with two air supply channels of the compressor (1) through the primary throttling element (3) and the flash evaporator (4), or the outlet of the condenser (2) is connected with the two air supply channels of the compressor (1) through the primary throttling element (3) and the subcooler (9), and then the flash evaporator (4) or the subcooler (9) is connected with the inlet of the compressor (1) through the secondary throttling element (7) and the evaporator (8); the single-screw refrigeration compressor coupled with the composite slide valve can realize the air supplement method while operating under partial load working conditions. The method solves the problem that the single-screw refrigeration compressor coupled with the composite slide valve cannot supplement air under partial load, and adds an operation mode for a heat pump system applying the compressor.
Description
Technical Field
The invention relates to a single-screw refrigeration compressor, aims to provide a variable-capacity air supplementing method when the capacity of the single-screw refrigeration compressor is adjusted by using a composite slide valve, and belongs to the field of air-conditioning and heat pump engineering.
Background
Northern winter is a season with constantly changing temperature, that is, the change of environmental temperature also affects the demand of people for heat load. For a compressor for a heat pump, capacity modulation can meet the demand for heat load. The composite slide valve is a single slide valve structure consisting of coaxial double slide blocks, and can simultaneously realize the adjustment of capacity and content ratio. The purpose of improving the heating capacity can be realized by adding an economizer system in the system to supplement air into the compressor. There are two main forms of economizer systems: respectively a flash tank front throttling system and a subcooler system. The front throttling system of the flash tank is that liquid from the condenser enters the flash tank after being throttled by the primary throttling element. The separated gas is directly fed into the compressor as intermediate air supplement. The subcooler system is that a part of refrigerant liquid at the outlet of the condenser is decompressed to intermediate pressure by a throttling element and flows into the subcooler, the heat of the other part of high-pressure refrigerant liquid from the condenser is absorbed in the subcooler, the high-pressure refrigerant liquid enters an air supplementing channel of the compressor after being evaporated, and the high-pressure refrigerant liquid is subcooled by the cooler and then enters the evaporator for evaporation after being throttled by the throttle valve. When the composite slide valve works under the partial load working condition, the heating capacity is insufficient, and when the heating capacity is larger during the full load working condition, the air can be supplied under the partial load working condition. However, during capacity modulation, the existing methods of air replenishment are not suitable for use at part load.
Disclosure of Invention
In order to realize the heating performance of the single-screw refrigeration compressor heat pump system coupled with the composite slide valve and meet the requirements of users, the invention provides a gas supplementing method under the partial load working condition.
The air supplementing device is coupled with the composite slide valve under the partial load of the single-screw refrigeration compressor, and an air supplementing system coupled with the composite slide valve is based on a flash tank front throttling system and a subcooler system; the compressor (1) is provided with two independent air replenishing channels, one is a full-load air replenishing channel, the other is a partial-load air replenishing channel, a full-load air replenishing electromagnetic valve (5) is arranged on the full-load air replenishing channel, and a partial-load air replenishing electromagnetic valve (6) is arranged on the partial-load air replenishing channel; the outlet of the compressor (1) is connected with the inlet of the cooler (2), the outlet of the cooler (2) is connected with two air supply channels of the compressor (1) through the primary throttling element (3) and the flash evaporator (4), or the outlet of the condenser (2) is connected with the two air supply channels of the compressor (1) through the primary throttling element (3) and the subcooler (9), and then the flash evaporator (4) or the subcooler (9) is connected with the inlet of the compressor (1) through the secondary throttling element (7) and the evaporator (8);
the method further comprises the following steps: the outlet of the compressor (1) is connected with the inlet of the cooler (2), the outlet of the cooler (2) is connected with the inlet of the flash evaporator (4) through the primary throttling element (3), the air outlet of the flash evaporator (4) is connected with the two air supply channels of the compressor (1), and the liquid outlet of the flash evaporator (4) is connected with the inlet of the compressor (1) through the secondary throttling element (7) and the evaporator (8) in sequence;
or the outlet of the compressor (1) is connected with the inlet of the cooler (2), the outlet of the cooler (2) is divided into two paths, one path is directly connected with the inlet of the compressor (1) through the subcooler (9) and the secondary throttling element (7) and the evaporator (8), and the other path at the outlet of the subcooler (2) is connected with the two air supply channels of the compressor (1) through the primary throttling element (3) and the subcooler (9); two paths of the outlet of the cooler (2) respectively flow through different flows of the subcooler (9), the gas outlet of the subcooler (9) is connected with the two gas supplementing channels of the compressor (1), and the liquid outlet of the subcooler (9) is connected with the inlet of the compressor (1).
The air supplementing device of the single-screw refrigeration compressor coupled with the composite slide valve under partial load comprises a controller (10), wherein the controller (10) is respectively connected with a power device (12) and an indoor temperature sensor (13) in the compressor (1), the power device (12) is connected with the slide valve (11), and the controller (10) controls the power device (12) according to the temperature measured by the temperature sensor (13) so as to control the slide of the slide valve (11).
When the heat pump system is in a gas supplementing mode, liquid from the condenser (2) enters through two gas supplementing channels on the compressor (1) after passing through the flash tank (4) or the pressure reducing valve (3) and the subcooler (9), and the gas supplementing channels are respectively provided with a full-load gas supplementing electromagnetic valve (5) and a partial-load gas supplementing electromagnetic valve (6). The compressor performs air supplement through a full-load air supplement electromagnetic valve (5) under the full-load working condition, and a partial-load air supplement electromagnetic valve is closed. When partial load air supplement is carried out, the system closes the full load air supplement electromagnetic valve (5) and opens the partial load electromagnetic valve (6), and air supplement of the single-screw refrigeration compressor under partial load can be realized.
When the air-cooled heat pump system operates in a low-temperature environment, the heat pump system is in an air supplementing mode, and the gas treated by the liquid from the cooler (2) through the flash evaporator (4) or the pressure reducing valve (3) and the subcooler (9) enters the compressor (1) through an air supplementing port connected with the full-load air supplementing electromagnetic valve (5), so that the heat pump system can increase the heating capacity; when the heating capacity of the heat pump is overlarge along with the change of the indoor temperature, the heat pump system can directly carry out partial load adjustment, and at the moment, the air replenishing channel is directly switched along with the movement of the slide valve, namely, the full-load air replenishing electromagnetic valve (5) is closed and the partial-load air replenishing electromagnetic valve (6) is opened.
The invention has simple structure and can simultaneously supplement air and regulate capacity.
Drawings
FIG. 1 is a schematic view of a heat pump system coupled with a flash tank air make-up and a composite slide valve
FIG. 2 is a schematic view of a heat pump system coupling subcooler air supplement and a compound slide valve
FIG. 3 shows a control diagram of a slide valve in part load mode
The system comprises a compressor 1, a cooler 2, a primary throttling element 3, a flash tank 4, a full-load air replenishing electromagnetic valve 5, a partial-load air replenishing electromagnetic valve 6, a secondary throttling element 7, an evaporator 8, a subcooler 9, a controller 10, a slide valve 11, a power device 12 and a temperature sensor 13.
Detailed Description
The present invention will be further illustrated with reference to the following examples, but the present invention is not limited to the following examples.
When the temperature measured by the indoor temperature sensor (13) is higher than a set value, which means that the indoor heat load required is less than the heating capacity of the heat pump in full load operation, the heat pump system is changed from full load to partial load, the controller (10) transmits an instruction to the power device (12) according to the data of the temperature sensor (13), the power device (12) pushes the slide valve (11) in the compressor to move to the position of partial load, at the moment, the controller (10) controls the electromagnetic valve on the gas supplementing pipeline in a linkage mode, the full load gas supplementing electromagnetic valve (5) is closed, and the partial load gas supplementing electromagnetic valve (6) is opened. The compressor can realize air supplement under partial load working condition.
When the temperature measured by the indoor temperature sensor (13) is higher than a set value, which means that the indoor heat load required is less than the heating capacity of the heat pump in full load operation, the heat pump system is changed from full load to partial load, the controller (10) transmits an instruction to the power device (12) according to the data of the temperature sensor (13), the power device (12) pushes the slide valve (11) in the compressor to move to the position of partial load, at the moment, the controller (10) controls the electromagnetic valve on the gas supplementing pipeline in a linkage mode, the full load gas supplementing electromagnetic valve (5) is closed, and the partial load gas supplementing electromagnetic valve (6) is opened. The compressor can realize air supplement under partial load working condition.
Claims (3)
1. The air supplement device under the partial load of the single-screw refrigeration compressor coupled with the composite slide valve is characterized in that an air supplement system coupled with the composite slide valve is based on a flash tank front throttling system and a subcooler system; the compressor (1) is provided with two independent air replenishing channels, one is a full-load air replenishing channel, the other is a partial-load air replenishing channel, a full-load air replenishing electromagnetic valve (5) is arranged on the full-load air replenishing channel, and a partial-load air replenishing electromagnetic valve (6) is arranged on the partial-load air replenishing channel; the outlet of the compressor (1) is connected with the inlet of the cooler (2), the outlet of the cooler (2) is connected with the two air supply channels of the compressor (1) through the primary throttling element (3) and the flash evaporator (4), or the outlet of the condenser (2) is connected with the two air supply channels of the compressor (1) through the primary throttling element (3) and the subcooler (9), and then the flash evaporator (4) or the subcooler (9) is connected with the inlet of the compressor (1) through the secondary throttling element (7) and the evaporator (8).
2. The air supplement device of the single-screw refrigeration compressor coupled with the composite slide valve under the part load according to the claim 1, characterized in that the outlet of the compressor (1) is connected with the inlet of the cooler (2), the outlet of the cooler (2) is connected with the inlet of the flash evaporator (4) through the first-stage throttling element (3), the air outlet of the flash evaporator (4) is connected with two air supplement channels of the compressor (1), and the liquid outlet of the flash evaporator (4) is connected with the inlet of the compressor (1) through the second-stage throttling element (7) and the evaporator (8) in sequence;
or the outlet of the compressor (1) is connected with the inlet of the cooler (2), the outlet of the cooler (2) is divided into two paths, one path is directly connected with the inlet of the compressor (1) through the subcooler (9) and the secondary throttling element (7) and the evaporator (8), and the other path at the outlet of the subcooler (2) is connected with the two air supply channels of the compressor (1) through the primary throttling element (3) and the subcooler (9); two paths of the outlet of the cooler (2) respectively flow through different flows of the subcooler (9), the gas outlet of the subcooler (9) is connected with the two gas supplementing channels of the compressor (1), and the liquid outlet of the subcooler (9) is connected with the inlet of the compressor (1).
3. A method for supplementing air by an air supplementing device under partial load of a single-screw refrigeration compressor coupled with a compound slide valve according to claim 1 or 2, characterized in that the air supplementing device under partial load of the single-screw refrigeration compressor coupled with the compound slide valve comprises a controller (10), the controller (10) is respectively connected with a power device (12) and an indoor temperature sensor (13) in the compressor (1), the power device (12) is connected with the slide valve (11), and the controller (10) is used for controlling the power device (12) according to the temperature measured by the temperature sensor (13) so as to control the slide of the slide valve (11);
when the heat pump system is in a gas supplementing mode, liquid from the condenser (2) enters through two gas supplementing channels on the compressor (1) after passing through the flash tank (4) or the pressure reducing valve (3) and the subcooler (9), and the gas supplementing channels are respectively provided with a full-load gas supplementing electromagnetic valve (5) and a partial-load gas supplementing electromagnetic valve (6). The compressor performs air supplement through a full-load air supplement electromagnetic valve (5) under the full-load working condition, and a partial-load air supplement electromagnetic valve is closed; when partial load air supplement is carried out, the system closes the full load air supplement electromagnetic valve (5) and opens the partial load electromagnetic valve (6), and air supplement of the single-screw refrigeration compressor under partial load can be realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110060204.4A CN112710098A (en) | 2021-01-17 | 2021-01-17 | Air supplementing device and method for single-screw refrigeration compressor coupled with composite slide valve under partial load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110060204.4A CN112710098A (en) | 2021-01-17 | 2021-01-17 | Air supplementing device and method for single-screw refrigeration compressor coupled with composite slide valve under partial load |
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| Publication Number | Publication Date |
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| CN112710098A true CN112710098A (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110060204.4A Withdrawn CN112710098A (en) | 2021-01-17 | 2021-01-17 | Air supplementing device and method for single-screw refrigeration compressor coupled with composite slide valve under partial load |
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Citations (14)
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|---|---|---|---|---|
| US4005949A (en) * | 1974-10-10 | 1977-02-01 | Vilter Manufacturing Corporation | Variable capacity rotary screw compressor |
| CN1336987A (en) * | 1999-09-22 | 2002-02-20 | 大金工业株式会社 | Screw compressor and refrigerator |
| DE102004002772A1 (en) * | 2004-01-20 | 2005-08-04 | Grasso Gmbh Refrigeration Technology | Screw compressor refrigeration system has a controlled economizer connection situated between an intermediate pressure separator and the compressor |
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| CN111023605A (en) * | 2019-12-20 | 2020-04-17 | 北京工业大学 | High-pressure-ratio refrigeration compressor flow-dividing gas-liquid co-inlet gas supplementing port cooperative cooling method |
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-
2021
- 2021-01-17 CN CN202110060204.4A patent/CN112710098A/en not_active Withdrawn
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Application publication date: 20210427 |