CN113982926A - Single-stage and double-stage switching compressor, air conditioning system and control method - Google Patents
Single-stage and double-stage switching compressor, air conditioning system and control method Download PDFInfo
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- CN113982926A CN113982926A CN202111215576.6A CN202111215576A CN113982926A CN 113982926 A CN113982926 A CN 113982926A CN 202111215576 A CN202111215576 A CN 202111215576A CN 113982926 A CN113982926 A CN 113982926A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004378 air conditioning Methods 0.000 title description 8
- 239000003507 refrigerant Substances 0.000 claims abstract description 21
- 238000005192 partition Methods 0.000 claims description 43
- 238000004891 communication Methods 0.000 claims description 22
- 230000006835 compression Effects 0.000 claims description 21
- 238000007906 compression Methods 0.000 claims description 21
- 239000013589 supplement Substances 0.000 claims description 20
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 241001136800 Anas acuta Species 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
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- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention provides a single-stage and double-stage switching compressor, an air conditioner and a control method, wherein the single-stage and double-stage switching compressor comprises the following components: the pneumatic control system comprises a first air cylinder and a second air cylinder, wherein the first air cylinder works under a first pressure, the second air cylinder works under a second pressure, and the first pressure is smaller than the second pressure, so that the first air cylinder is a low-pressure air cylinder at a relatively low pressure, and the second air cylinder is a high-pressure air cylinder at a relatively high pressure; the second cylinder can be controlled to be loaded or unloaded, when the second cylinder is loaded, the refrigerant can be compressed by the first cylinder and then compressed by the second cylinder, and when the second cylinder is unloaded, the refrigerant is compressed by the first cylinder only. According to the invention, the energy efficiency of the two-stage compressor under the low-load working condition is improved; and the problem of small single-stage mode displacement caused by the unloading of a low-pressure cylinder in single-stage and double-stage switching is solved.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a single-stage and double-stage switching compressor, an air conditioning system and a control method.
Background
When common household air conditioners and heat pump water heaters are used in summer hot and winter cold areas and north cold areas, the air conditioner products generally have the problems of poor low-temperature heating effect, slow high-temperature refrigeration and low energy efficiency; the problem of poor low-temperature hot water making effect of the household heat pump water heater. The advent of dual stage enthalpy addition technology addresses these issues. The two-stage enthalpy-increasing compressor is used for the high-load working conditions, the pressure ratio is large, the pressure ratio can be effectively distributed by adopting two-stage compression, an air conditioning system can efficiently run, the exhaust temperature is reduced, and the reliability of the compressor is improved; however, when the compressor is used in a light working condition with low load, the energy efficiency is lower, and the compressor is not as good as the conventional single-stage compressor.
Patents CN106321433A and CN108302041A propose a technology of single-double stage switching by a variable displacement mechanism, which controls whether a low pressure cylinder with a large displacement works or not, and only a high pressure cylinder operates in a single stage mode, and the displacement of the high pressure cylinder is small, so that it may be difficult to meet the use requirement. On the other hand, in order to realize single-stage and double-stage switching, a plurality of valve elements are adopted for control in the patent technology, so that a peripheral pipeline is complicated.
Because the double-stage compression mode adopted by the double-stage compressor in the prior art has one more compression and exhaust process than the single-stage compression, the friction loss and the flow loss have higher ratio when the double-stage compressor is in lighter load, so that the energy efficiency is lower than that of the single-stage compressor; the invention provides a single-stage and double-stage switching compressor, an air conditioning system and a control method, aiming at the technical problems that the compressor with single-stage and double-stage switching has small displacement, is difficult to meet the use requirement and has a complex structure because the compressor controls the unloading or loading of a low-pressure cylinder, and is inferior to the conventional single-stage compressor.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects that the double-stage enthalpy-increasing compressor in the prior art has low energy efficiency under a low-load light working condition and the discharge capacity is small and the use requirement is difficult to meet due to the fact that the known single-stage and double-stage switching technology controls the discharge or the loading of a low-pressure cylinder, so that the single-stage and double-stage switching compressor, the air conditioning system and the control method are provided.
In order to solve the above problems, the present invention provides a single-stage and double-stage switching compressor, comprising:
the pneumatic control system comprises a first air cylinder and a second air cylinder, wherein the first air cylinder works under a first pressure, the second air cylinder works under a second pressure, and the first pressure is smaller than the second pressure, so that the first air cylinder is a low-pressure air cylinder at a relatively low pressure, and the second air cylinder is a high-pressure air cylinder at a relatively high pressure; the second cylinder can be controlled to be loaded or unloaded, when the second cylinder is loaded, the refrigerant can be compressed by the first cylinder and then compressed by the second cylinder, and when the second cylinder is unloaded, the refrigerant is compressed by the first cylinder only.
In some embodiments, the first cylinder is located above the second cylinder, a partition plate assembly is arranged between the first cylinder and the second cylinder, a middle pressure cavity is arranged on the partition plate assembly, the middle pressure cavity can be communicated with exhaust gas of the first cylinder, and the interior of the second cylinder can be communicated with the middle pressure cavity to suck gas from the middle pressure cavity; and the air suction port of the first air cylinder is communicated with the air suction pipe of the single-stage and double-stage switching compressor.
In some embodiments, the partition plate assembly includes a first partition plate and a second partition plate, one end of the first partition plate is connected to the end surface of the first cylinder, the other end of the first partition plate is connected to the end surface of the second partition plate, the other end of the second partition plate is connected to the end surface of the second cylinder, the medium pressure chamber is disposed in the first partition plate, a first communicating channel is further disposed on the first partition plate, the first communicating channel communicates the inside of the first cylinder with the medium pressure chamber, a second communicating channel is further disposed on the second partition plate, and the second communicating channel communicates the inside of the second cylinder with the medium pressure chamber.
In some embodiments, the cylinder unloading device further comprises a first flange and a second flange, the first flange is arranged on a side end face of the first cylinder opposite to the partition plate assembly, the second flange is arranged on a side end face of the second cylinder opposite to the partition plate assembly, a pin control assembly is further arranged on the second flange, a second roller and a second slide plate are further arranged in the second cylinder, and the pin control assembly can move to be clamped with the second slide plate to limit the movement of the second slide plate so as to unload the second cylinder; the pin control assembly can move to a position where the pin control assembly is not clamped with the second sliding piece so as not to limit the movement of the second sliding piece, and therefore the second air cylinder is compressed normally.
In some embodiments, further comprising a housing, the first cylinder, the second cylinder, and the diaphragm assembly all disposed within an interior of the housing;
the pin control assembly comprises a pin and an elastic component, the pin comprises a head and a tail, a pin hole is formed in the second flange, the pin is contained in the pin hole and can move in the pin hole, a groove is formed in the second sliding piece, the head of the pin can be inserted into the groove to clamp the second sliding piece, the elastic component is arranged at the tail of the pin, the head of the pin is communicated with the gas in the shell, and the tail of the pin is communicated with the gas in the medium-pressure cavity.
In some embodiments, a first exhaust port is disposed on the first flange, the first exhaust port is communicated with the compression cavity of the first cylinder, a first exhaust valve is disposed at the first exhaust port, a second exhaust valve is disposed on the first partition plate at the first communication channel, a second exhaust port is disposed on the second flange, and a third exhaust valve is disposed at the second exhaust port;
still be provided with the exhaust chamber on the second flange, be provided with third intercommunication passageway on the second cylinder, be provided with fourth intercommunication passageway on the baffle subassembly, set up fifth intercommunication passageway on the first cylinder, set up the third gas vent on the first flange, the exhaust chamber third intercommunication passageway, fourth intercommunication passageway, fifth intercommunication passageway and the third gas vent communicates in proper order, third gas vent department is provided with fourth discharge valve.
The invention also provides an air conditioner which comprises the single-stage and double-stage switching compressor, and further comprises an air supplement pipeline, an air exhaust pipeline and a communication branch, wherein one end of the air supplement pipeline can be communicated with the medium-pressure cavity in the partition plate assembly to supplement air in the medium-pressure cavity, one end of the air exhaust pipeline is communicated to the inside of the shell to exhaust air, one end of the communication branch is communicated with the air exhaust pipeline, the other end of the communication branch is communicated with the air supplement pipeline, and a control valve is arranged on the communication branch.
In some embodiments, the device further comprises a flash evaporator and an enthalpy increasing component, the other end of the air supply pipeline is communicated with the flash evaporator, and the enthalpy increasing component is arranged on the air supply pipeline.
In some embodiments, the control valve is a solenoid valve; and/or the enthalpy-increasing component is an ejector.
The present invention also provides a method for controlling an air conditioner as set forth in any one of the above, comprising: detecting outdoor working conditions;
judging whether enthalpy increasing and air supplementing are needed or not according to the outdoor working condition;
a control step, wherein when enthalpy increasing and air replenishing are needed, the control valve is opened, and the first cylinder and the second cylinder work and are connected in series to form a two-stage cylinder; when enthalpy increasing and air replenishing are not needed, the control valve is closed, the second cylinder is unloaded and does not work, and only the first cylinder works and operates.
The single-stage and double-stage switching compressor, the air conditioner and the control method provided by the invention have the following beneficial effects:
1. according to the invention, the high-pressure cylinder in the two cylinders is set as the variable-capacity cylinder, and the two-stage compressor has the characteristic that the displacement of the low-pressure cylinder is larger than that of the high-pressure cylinder, so that the discharge of the compressor during single-stage operation can be improved by controlling the unloading of the high-pressure cylinder and the operation of the low-pressure cylinder, the problem of small displacement in a single-stage mode is effectively solved, and the operation energy efficiency of the compressor is improved; whether the high-pressure cylinder works or not is controlled through the variable-volume structure, the displacement of the compressor is unchanged in a two-stage mode, the refrigerating capacity meets the use requirement, and the single-stage mode operates efficiently in a low-load working condition; under the high-load working condition, the energy efficiency of the two-stage mode is not attenuated. Meanwhile, an internal flow path is optimized, and single-stage and double-stage switching is simpler and more reliable.
2. The invention also uses pin control structure and the air exhaust pipeline and air supplement pipeline outside the compressor, which are matched with the pin control structure, the pin head is communicated with the high pressure inside the shell, the pin tail is communicated with the middle pressure cavity, the middle pressure cavity can selectively connect the high pressure exhaust or middle pressure air supplement according to the actual operation condition, when the high pressure exhaust is connected, the pin control structure can control the second slide sheet to unload without moving, thus realizing the compression of the single-stage low pressure cylinder; when the middle-pressure air supply is switched on, the pressure of the head of the pin is greater than the resultant force applied to the tail of the pin, and the pin control structure cannot limit the second slip sheet, so that the second cylinder normally compresses to work, and the double-stage compression air supply effect is realized.
Drawings
FIG. 1 is a view showing the overall structure of a single-stage or double-stage switching compressor according to the present invention;
FIG. 2 is a block diagram of the pump body of the single stage and double stage switching compressor of the present invention;
FIG. 3 is a diagram of the internal gas flow path of the single-stage and double-stage switching compressor of the present invention in a two-stage compression mode;
FIG. 4 is a diagram of the internal gas flow path of the single two stage switched compressor of the present invention in a single stage compression mode;
FIG. 5 is a pin control channel flow diagram of the present invention in a dual stage mode;
FIG. 6 is a pin control passage flow diagram in a single stage mode of the present invention;
FIG. 7 is a schematic diagram of the air conditioning system of the present invention in a dual stage mode;
fig. 8 is a schematic diagram of an air conditioning system of the present invention in a single stage mode.
The reference numerals are represented as:
11. a first cylinder; 11a, a fifth communication channel; 12. a second cylinder; 12a, a third communication channel; 2. a bulkhead assembly; 20. a medium pressure chamber; 21. a first separator; 22. a second separator; 2a, a fourth communication channel; 31. a first flange; 31a, a first exhaust port; 31b, a third exhaust port; 32. a second flange; 32a, a second exhaust port; 32b, an exhaust cavity; 41. a first roller; 42. a second roller; 51. a first slip sheet; 52. a second slip sheet; 6. a pin control assembly; 61. a pin; 61a, a head; 61b, tail; 62. an elastic member; 7. a housing; 81. a first exhaust valve; 82. a second exhaust valve; 83. a third exhaust valve; 84. a fourth exhaust valve; 9. a control valve; 10. a flash evaporator; 13. an enthalpy increasing component; 14. a condenser; 15. an evaporator; 16. a liquid separator; 17. a primary throttling device; 18. a secondary throttling device; 19. a flange cover plate; 101. an air supply pipeline; 102. an exhaust line; 103. and a branch is communicated.
Detailed Description
As shown in fig. 1 to 8, the present invention provides a single-stage and double-stage switching compressor, which includes:
a first cylinder 11 and a second cylinder 12, the first cylinder 11 operating at a first pressure and the second cylinder 12 operating at a second pressure, the first pressure being less than the second pressure, such that the first cylinder 11 is a low pressure cylinder at a relatively low pressure and the second cylinder 12 is a high pressure cylinder at a relatively high pressure; the second cylinder 12 can be controlled to be loaded or unloaded, when the second cylinder 12 is loaded, the refrigerant can be compressed by the first cylinder 11 and then compressed by the second cylinder 12, and when the second cylinder 12 is unloaded, the refrigerant is compressed by the first cylinder 11 only.
According to the invention, the high-pressure cylinder in the two cylinders is set as the variable-capacity cylinder, and the two-stage compressor has the characteristic that the displacement of the low-pressure cylinder is larger than that of the high-pressure cylinder, so that the discharge of the compressor during single-stage operation can be improved by controlling the unloading of the high-pressure cylinder and the operation of the low-pressure cylinder, the problem of small displacement in a single-stage mode is effectively solved, and the operation energy efficiency of the compressor is improved; whether the high-pressure cylinder works or not is controlled through the variable-volume structure, the displacement of the compressor is unchanged in a two-stage mode, the refrigerating capacity meets the use requirement, and the single-stage mode operates efficiently in a low-load working condition; under the high-load working condition, the energy efficiency of the two-stage mode is not attenuated. Meanwhile, an internal flow path is optimized, and single-stage and double-stage switching is simpler and more reliable.
In some embodiments, the first cylinder 11 is located above the second cylinder 12, a diaphragm assembly 2 is arranged between the first cylinder 11 and the second cylinder 12, a middle pressure cavity 20 is arranged on the diaphragm assembly 2, the middle pressure cavity 20 can be communicated with exhaust gas of the first cylinder 11, and the interior of the second cylinder 12 can also be communicated with the middle pressure cavity 20 to suck air from the middle pressure cavity 20; the suction port of the first cylinder 11 is communicated with the suction pipe of the single-stage and double-stage switching compressor. The first cylinder, the partition plate assembly and the second cylinder are sequentially arranged from top to bottom, and the middle-pressure cavity arranged in the partition plate assembly can receive middle-pressure gas compressed and discharged by the first cylinder, store supplemented middle-pressure gas and guide the supplemented middle-pressure gas into the high-pressure cylinder.
Based on the structure that the middle-low pressure level cylinder of the pump body of the double-stage enthalpy-increasing compressor is arranged on, exhaust valves are respectively arranged on two sides of the low pressure cylinder. The first exhaust valve 81 is positioned on the first flange 31 and connected with the housing cavity; the medium pressure exhaust valve (second exhaust valve 82) is located on the first partition plate 21 and connected to the partition plate cavity formed by the first partition plate 21 and the second partition plate 22.
In some embodiments, the partition plate assembly 2 includes a first partition plate 21 and a second partition plate 22, the first partition plate 21 has one end connected to an end surface of the first cylinder 11 and the other end connected to an end surface of the second partition plate 22, the second partition plate 22 has the other end connected to an end surface of the second cylinder 12, the medium pressure chamber 20 is disposed inside the first partition plate 21, a first communication passage is further disposed on the first partition plate 21, the first communication passage communicates the inside of the first cylinder 11 with the medium pressure chamber 20, a second communication passage is further disposed on the second partition plate 22, and the second communication passage communicates the inside of the second cylinder 12 with the medium pressure chamber 20. This is a further preferred form of construction of the diaphragm assembly of the invention to enable gas drawn in and exhausted from the interior of the first cylinder to enter the intermediate pressure chamber and to direct the gas in the intermediate pressure chamber into the second cylinder.
In some embodiments, the cylinder further comprises a first flange 31 and a second flange 32, the first flange 31 is disposed on a side end surface of the first cylinder 11 opposite to the diaphragm assembly 2, the second flange 32 is disposed on a side end surface of the second cylinder 12 opposite to the diaphragm assembly 2, a pin control assembly 6 is further disposed on the second flange 32, a second roller 42 and a second slide sheet 52 are further disposed inside the second cylinder 12, and the pin control assembly 6 is movable to be in clamping connection with the second slide sheet 52 to limit the movement of the second slide sheet 52 so as to unload the second cylinder 12; the pin control assembly 6 can move out of engagement with the second slide 52 to restrict movement of the second slide 52 so that the second cylinder 12 is normally compressed. The invention also can respectively seal and support the axial end face of the first cylinder through the first flange and the second flange, can control whether the second cylinder runs or not through the arrangement of the pin control assembly, and can stop the second sliding sheet through the movement of the pin assembly so as to unload the second cylinder or release the stop of the second sliding sheet so as to ensure the normal compression running of the second cylinder.
In some embodiments, further comprising a housing 7, said first cylinder 11, said second cylinder 12 and said diaphragm assembly 2 being disposed inside said housing 7;
the pin control assembly 6 comprises a pin 61 and an elastic component 62, the pin 61 comprises a head part 61a and a tail part 61b, a pin hole is formed in the second flange 32, the pin 61 is accommodated in the pin hole and can move in the pin hole, a groove is formed in the second sliding piece 52, the head part of the pin 61 can be inserted into the groove to clamp the second sliding piece 52, the elastic component 62 is arranged at the tail part 61b of the pin 61, the head part 61a is introduced into the gas in the shell 7, and the tail part 61b is introduced into the gas in the medium pressure cavity 20.
The pin control assembly is a preferred structure form of the pin control assembly, the pin and the elastic component are used, the head part of the pin is communicated with high-pressure gas in the shell, the tail part of the pin is communicated with medium-pressure gas or high-pressure gas in the medium-pressure cavity, the pin can be effectively controlled, and the medium-pressure gas or high-pressure gas is introduced into the medium-pressure cavity, so that whether the pin moves or not can be controlled, and whether the second sliding piece is clamped by the pin or not can be controlled.
The invention also uses pin control structure and the air exhaust pipeline and air supplement pipeline outside the compressor, which are matched with the pin control structure, the pin head is communicated with the high pressure inside the shell, the pin tail is communicated with the middle pressure cavity, the middle pressure cavity can selectively connect the high pressure exhaust or middle pressure air supplement according to the actual operation condition, when the high pressure exhaust is connected, the pin control structure can control the second slide sheet to unload without moving, thus realizing the compression of the single-stage low pressure cylinder; when the middle-pressure air supply is switched on, the pressure of the head of the pin is greater than the resultant force applied to the tail of the pin, and the pin control structure cannot limit the second slip sheet, so that the second cylinder normally compresses to work, and the double-stage compression air supply effect is realized.
In some embodiments, the first flange 31 is provided with a first exhaust port 31a, the first exhaust port 31a is communicated with a compression cavity of the first cylinder 11, the first exhaust port is provided with a first exhaust valve 81, the first partition 21 is provided with a second exhaust valve 82 at the first communication passage, the second flange 32 is provided with a second exhaust port 32a, and the second exhaust port 32a is provided with a third exhaust valve 83;
still be provided with exhaust chamber 32b on the second flange 32, be provided with third intercommunication passageway 12a on the second cylinder 12, be provided with fourth intercommunication passageway 2a on the baffle subassembly 2, set up fifth intercommunication passageway 11a on the first cylinder 11, set up third gas vent 31b on the first flange 31, exhaust chamber 32b third intercommunication passageway 12a, fourth intercommunication passageway 2a, fifth intercommunication passageway 11a and third gas vent 31b communicate in proper order, third gas vent 31b department is provided with fourth discharge valve 84.
The communicating passage and the exhaust valve structure on the first flange, the second flange, the first cylinder, the second cylinder and other parts of the invention are that the first cylinder can be discharged from the first exhaust valve on the first flange and can also be discharged from the fourth exhaust valve through the second cylinder, thereby realizing the switching between single-stage compression and double-stage compression.
The invention also provides an air conditioner, which comprises the single-stage and double-stage switching compressor, and further comprises an air supplement pipeline 101, an exhaust pipeline 102 and a communication branch 103, wherein one end of the air supplement pipeline 101 can be communicated with the medium-pressure cavity 20 in the partition plate assembly 2 to supplement air in the medium-pressure cavity 20, one end of the exhaust pipeline 102 is communicated to the inside of the shell 7 to exhaust air, one end of the communication branch 103 is communicated with the exhaust pipeline 102, the other end of the communication branch is communicated with the air supplement pipeline 101, and a control valve 9 is arranged on the communication branch 103.
The invention also uses pin control structure and the air exhaust pipeline and air supplement pipeline outside the compressor, which are matched with the pin control structure, the pin head is communicated with the high pressure inside the shell, the pin tail is communicated with the middle pressure cavity, the middle pressure cavity can selectively connect the high pressure exhaust or middle pressure air supplement according to the actual operation condition, when the high pressure exhaust is connected, the pin control structure can control the second slide sheet to unload without moving, thus realizing the compression of the single-stage low pressure cylinder; when the middle-pressure air supply is switched on, the pressure of the head of the pin is greater than the resultant force applied to the tail of the pin, and the pin control structure cannot limit the second slip sheet, so that the second cylinder normally compresses to work, and the double-stage compression air supply effect is realized.
Fig. 2 is a schematic diagram of a pump body structure. As shown in fig. 5, the pin head is communicated with the inner cavity of the housing, i.e. the pin head is always a high-pressure refrigerant. When the enthalpy increasing component is introduced into the medium-pressure refrigerant, the medium-pressure refrigerant enters the tail part of the pin through the pin control channel, at the moment, the pin moves downwards under the action of pressure difference, and the second sliding piece 52 can work normally. As shown in fig. 3, at this time, the compressor operates in a two-stage mode, after the low-pressure cylinder sucks air to complete one-stage compression, the medium-pressure refrigerant enters the partition cavity through the medium-pressure exhaust valve, the high-pressure cylinder sucks the medium-pressure refrigerant, after the two-stage compression is completed, the high-pressure refrigerant enters the flange cavity through the high-pressure exhaust valve (third exhaust valve 83), and then enters the shell cavity through the exhaust circulation hole.
As shown in fig. 6, when the enthalpy increasing component is introduced with the high-pressure refrigerant, the high-pressure refrigerant enters the tail portion of the pin through the pin control channel, and after the pressure of the high-pressure refrigerant is balanced with the pressure of the head portion of the pin, the pin moves upward under the spring force, and after the second sliding piece 52 is locked, the second cylinder 12 runs in a no-load mode. As shown in fig. 4, at this time, the compressor operates in a single-stage mode, and after the low-pressure cylinder completes compression, the high-pressure refrigerant enters the housing cavity through the first exhaust valve 81 on the first flange 31; when the displacement is large, a fourth exhaust valve 84 is arranged between the partition cavity and the shell cavity, so that exhaust is assisted to reduce exhaust resistance.
In some embodiments, the system further comprises a flash evaporator 10 and an enthalpy increasing component 13, the other end of the gas supplementing pipeline 101 is communicated with the flash evaporator 10, and the enthalpy increasing component 13 is arranged on the gas supplementing pipeline 101. The air conditioner is further preferable in structural form, the air supply gas can be provided through the flash evaporator, and the enthalpy increasing component can accelerate the air supply gas.
In some embodiments, the control valve 9 is a solenoid valve; and/or the enthalpy-increasing component 13 is an ejector. This is the preferred form of construction for the control valve and enthalpy increasing component of the present invention.
The present invention also provides a method for controlling an air conditioner as set forth in any one of the above, comprising: detecting outdoor working conditions;
judging whether enthalpy increasing and air supplementing are needed or not according to the outdoor working condition;
a control step, wherein when enthalpy increasing and air replenishing are needed, the control valve is opened, and the first cylinder and the second cylinder work and are connected in series to form a two-stage cylinder; when enthalpy-increasing air-filling is not needed, the control valve is closed, the second cylinder 12 is unloaded and does not work, and only the first cylinder works and operates.
As shown in fig. 1, the pump body and the motor are disposed inside the compressor housing, a liquid separator component and an enthalpy increasing component are disposed outside the housing, and a cavity inside the housing is filled with a high-pressure refrigerant during operation of the compressor. As shown in fig. 7, a branch is provided between the compressor discharge pipe and the enthalpy-increasing component suction pipe, and an electromagnetic valve is provided on the branch for controlling the on-off of the branch. The electromagnetic valve is closed, the flash evaporator is normally supplied with air, the cavity of the clapboard and the air suction port of the high-pressure cylinder are at medium pressure, and the compressor operates in a two-stage mode. As shown in fig. 8, after the flash evaporator is closed and air is supplied, the electromagnetic valve is opened, the high pressure is introduced into the enthalpy increasing component, the partition cavity and the high pressure cylinder air inlet are at high pressure, and the compressor operates in a single-stage mode. The invention firstly judges whether air supplement is needed, then the flash evaporator opens or closes the air supplement channel, and then the electromagnetic valve (namely the control valve) is opened or closed. The enthalpy increasing component is a component connected with an air replenishing channel of the flash evaporator and is used for gas-liquid separation of supplemented refrigerants.
As shown in figures 5 and 6, the pin head is communicated with the cavity of the shell and is always high-pressure refrigerant, the tail part of the pin is communicated with the suction port of the high-pressure cylinder, the enthalpy increasing component is introduced with high pressure at the moment, so the tail part of the pin is also high pressure, and after the pressure of the tail part of the pin is balanced with the pressure of the pin head, the pin is acted by a spring and can move upwards to clamp a slide sheet of the high-pressure cylinder, and the operation is carried out according to a single-stage mode at the moment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A single two stage switching compressor, characterized by: the method comprises the following steps:
a first cylinder (11) and a second cylinder (12), the first cylinder (11) operating at a first pressure and the second cylinder (12) operating at a second pressure, the first pressure being less than the second pressure, such that the first cylinder (11) is a low pressure cylinder at a relatively low pressure and the second cylinder (12) is a high pressure cylinder at a relatively high pressure; the second cylinder (12) can be controlled to be loaded or unloaded, when the second cylinder (12) is loaded, the refrigerant can be compressed by the first cylinder (11) and then compressed by the second cylinder (12), and when the second cylinder (12) is unloaded, the refrigerant is compressed only by the first cylinder (11).
2. The single two stage switching compressor as set forth in claim 1, wherein:
the first cylinder (11) is positioned above the second cylinder (12), a partition plate assembly (2) is arranged between the first cylinder (11) and the second cylinder (12), a medium pressure cavity (20) is arranged on the partition plate assembly (2), the medium pressure cavity (20) can be communicated with exhaust gas of the first cylinder (11), and the interior of the second cylinder (12) can also be communicated with the medium pressure cavity (20) so as to suck air from the medium pressure cavity (20); and the air suction port of the first cylinder (11) is communicated with the air suction pipe of the single-stage and double-stage switching compressor.
3. The single two stage switching compressor as set forth in claim 2, wherein:
the baffle plate assembly (2) comprises a first baffle plate (21) and a second baffle plate (22), one end of the first baffle plate (21) is connected with the end face of the first air cylinder (11), the other end of the first baffle plate is connected with the end face of the second baffle plate (22), the other end face of the second baffle plate (22) is connected with the end face of the second air cylinder (12), the middle pressure cavity (20) is arranged in the first baffle plate (21), a first communicating channel is further arranged on the first baffle plate (21), the first communicating channel communicates the inside of the first air cylinder (11) with the middle pressure cavity (20), a second communicating channel is further arranged on the second baffle plate (22), and the inside of the second air cylinder (12) is communicated with the middle pressure cavity (20).
4. The single two stage switching compressor as set forth in claim 3, wherein:
the cylinder head further comprises a first flange (31) and a second flange (32), the first flange (31) is arranged on one side end face, opposite to the partition plate assembly (2), of the first cylinder (11), the second flange (32) is arranged on one side end face, opposite to the partition plate assembly (2), of the second cylinder (12), a pin control assembly (6) is further arranged on the second flange (32), a second roller (42) and a second sliding sheet (52) are further arranged inside the second cylinder (12), and the pin control assembly (6) can move to be clamped with the second sliding sheet (52) to limit the movement of the second sliding sheet (52) so as to unload the second cylinder (12); the pin control assembly (6) can move to be not clamped with the second sliding piece (52) so as not to limit the movement of the second sliding piece (52), and therefore the second air cylinder (12) is compressed normally.
5. The single two stage switching compressor as set forth in claim 4, wherein:
the air cylinder assembly further comprises a shell (7), and the first air cylinder (11), the second air cylinder (12) and the partition plate assembly (2) are arranged inside the shell (7);
the pin control assembly (6) comprises a pin (61) and an elastic component (62), the pin (61) comprises a head portion (61a) and a tail portion (61b), a pin hole is formed in the second flange (32), the pin (61) is accommodated in the pin hole and can move in the pin hole, a groove is formed in the second sliding piece (52), the head portion of the pin (61) can be inserted into the groove to clamp the second sliding piece (52), the elastic component (62) is arranged on the tail portion (61b) of the pin (61), the head portion (61a) is communicated with gas in the shell (7), and the tail portion (61b) is communicated with gas in the medium pressure cavity (20).
6. The single two stage switching compressor as set forth in claim 4, wherein:
a first exhaust port (31a) is formed in the first flange (31), the first exhaust port (31a) is communicated with a compression cavity of the first cylinder (11), a first exhaust valve (81) is arranged at the first exhaust port, a second exhaust valve (82) is arranged on the first partition plate (21) and positioned at the first communication channel, a second exhaust port (32a) is formed in the second flange (32), and a third exhaust valve (83) is arranged at the second exhaust port (32 a);
still be provided with exhaust chamber (32b) on second flange (32), be provided with third intercommunication passageway (12a) on second cylinder (12), be provided with fourth intercommunication passageway (2a) on baffle subassembly (2), set up fifth intercommunication passageway (11a) on first cylinder (11), set up third gas vent (31b) on first flange (31), exhaust chamber (32b) third intercommunication passageway (12a), fourth intercommunication passageway (2a), fifth intercommunication passageway (11a) and third gas vent (31b) communicate in proper order, third gas vent (31b) department is provided with fourth discharge valve (84).
7. An air conditioner, characterized in that: the single-stage and double-stage switching compressor comprises the single-stage and double-stage switching compressor as claimed in claim 5, and further comprises an air supplement pipeline (101), an exhaust pipeline (102) and a communication branch (103), wherein one end of the air supplement pipeline (101) can be communicated with the medium-pressure cavity (20) in the partition plate assembly (2) to supplement air in the medium-pressure cavity (20), one end of the exhaust pipeline (102) is communicated to the inside of the shell (7) to exhaust air, one end of the communication branch (103) is communicated with the exhaust pipeline (102), the other end of the communication branch is communicated with the air supplement pipeline (101), and a control valve (9) is arranged on the communication branch (103).
8. The air conditioner according to claim 7, wherein:
still include flash vessel (10) and increase enthalpy part (13), the other end of gas supply pipeline (101) with flash vessel (10) intercommunication, increase enthalpy part (13) set up in on gas supply pipeline (101).
9. The air conditioner according to claim 8, wherein:
the control valve (9) is an electromagnetic valve; and/or the enthalpy-increasing component (13) is an ejector.
10. A control method of an air conditioner according to any one of claims 7 to 9, characterized in that: the method comprises the following steps: detecting outdoor working conditions;
judging whether enthalpy increasing and air supplementing are needed or not according to the outdoor working condition;
a control step, wherein when enthalpy increasing and air replenishing are needed, the control valve is opened, and the first cylinder and the second cylinder work and are connected in series to form a two-stage cylinder; when enthalpy-increasing air-replenishing is not needed, the control valve is closed, the second cylinder (12) is unloaded and does not work, and only the first cylinder works and operates.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111215576.6A CN113982926A (en) | 2021-10-19 | 2021-10-19 | Single-stage and double-stage switching compressor, air conditioning system and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111215576.6A CN113982926A (en) | 2021-10-19 | 2021-10-19 | Single-stage and double-stage switching compressor, air conditioning system and control method |
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| CN202111215576.6A Withdrawn CN113982926A (en) | 2021-10-19 | 2021-10-19 | Single-stage and double-stage switching compressor, air conditioning system and control method |
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