CN113883054A - Pump body subassembly, variable volume compressor and air conditioning system - Google Patents

Pump body subassembly, variable volume compressor and air conditioning system Download PDF

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Publication number
CN113883054A
CN113883054A CN202111263527.XA CN202111263527A CN113883054A CN 113883054 A CN113883054 A CN 113883054A CN 202111263527 A CN202111263527 A CN 202111263527A CN 113883054 A CN113883054 A CN 113883054A
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CN
China
Prior art keywords
variable
volume
variable volume
channel
pump body
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Pending
Application number
CN202111263527.XA
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Chinese (zh)
Inventor
魏会军
何庆南
阙沛祯
苗旺
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Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
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Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
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Application filed by Gree Green Refrigeration Technology Center Co Ltd of Zhuhai filed Critical Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority to CN202111263527.XA priority Critical patent/CN113883054A/en
Publication of CN113883054A publication Critical patent/CN113883054A/en
Pending legal-status Critical Current

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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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F04C18/3562—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
    • 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
    • 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
    • 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
    • F04C29/04—Heating; Cooling; Heat insulation
    • 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
    • F04C29/06—Silencing
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

The application provides a pump body subassembly, varactor compressor and air conditioning system. The pump body assembly comprises at least two cylinders and a variable volume tank (10), at least one of the two cylinders is a variable volume cylinder, a variable volume slide sheet is arranged on the variable volume cylinder, a pneumatic driving cavity (302) is arranged at the tail part of the variable volume slide sheet, the pneumatic driving cavity (302) is communicated with the variable volume tank (10) through a ventilation flow path (301), the maximum volume of the pneumatic driving cavity (302) is V1, the minimum value of the effective flow area of the ventilation flow path (301) is S, and the relation between S and V1 meets the condition that S/V1 is more than or equal to 0.02. According to the pump body subassembly of this application, can effectively solve pump body subassembly gleitbretter afterbody and store up liquid refrigerant, the great problem of gleitbretter afterbody pressure pulsation avoids the compressor unusual noise to appear, promotes user experience.

Description

Pump body subassembly, variable volume compressor and air conditioning system
Technical Field
The application relates to the technical field of compressors, in particular to a pump body assembly, a variable-capacity compressor and an air conditioning system.
Background
In order to meet the energy efficiency requirements of a multi-split air conditioning system under low and high loads, variable capacity compressors are increasingly widely used in the multi-split air conditioning system. The existing variable-capacity compressor generally adopts a sliding vane tail sealing structure, and high pressure or low pressure is introduced to realize the work or unloading of a variable-capacity cylinder. The tail part of a sliding sheet of the variable-volume cylinder can be selectively communicated with an air suction pipe or an exhaust pipe of a compressor, namely, a pin head part can be communicated with high pressure or low pressure, the tail part of a pin is always communicated with the air suction pipe of the compressor to keep low pressure, and under the action of differential pressure of the pin head part and the tail part, locking or separation of the pin and the sliding sheet is realized, so that switching of single cylinders and double cylinders is realized.
It has the following problems: when the system heats at low temperature, the suction superheat degree of the compressor is less than 0 due to low outdoor temperature, and the suction gas of the compressor carries part of liquid refrigerant; partial liquid refrigerant also can be accumulated in varactor cylinder gleitbretter afterbody, and after the compressor was switched to the double-cylinder operation by the single cylinder, the liquid refrigerant of varactor cylinder gleitbretter afterbody can not in time discharge, leads to the gleitbretter afterbody great pressure pulsation to appear, and unusual noise appears in the compressor, seriously influences user experience.
Disclosure of Invention
Consequently, the technical problem that this application will be solved lies in providing a pump body subassembly, variable volume compressor and air conditioning system, can effectively solve pump body subassembly gleitbretter afterbody and store up liquid refrigerant, and the great problem of gleitbretter afterbody pressure pulsation avoids the compressor unusual noise to appear, promotes user experience.
In order to solve the problems, the application provides a pump body assembly, which comprises at least two cylinders and a variable volume tank, wherein at least one of the at least two cylinders is a variable volume cylinder, a variable volume slide sheet is arranged on the variable volume cylinder, a pneumatic driving cavity is arranged at the tail part of the variable volume slide sheet, the pneumatic driving cavity is communicated with the variable volume tank through a ventilation flow path, the maximum volume of the pneumatic driving cavity is V1, the minimum value of the effective flow area of the ventilation flow path is S, and the relation between S and V1 meets the condition that S/V1 is more than or equal to 0.02.
Preferably, the effective volume of the varactor is V2, and the relationship between V1 and V2 satisfies V2/V1 ≧ 20.
Preferably, the vent flow path includes a variable volume vent connected to the variable volume tank by a connecting tube.
Preferably, the ventilation flow path further comprises a first channel and a second channel which are arranged at intervals, the first channel is arranged on the upper side of the variable-volume vent hole, the second channel is arranged on the lower side of the variable-volume vent hole, and the variable-volume vent hole is connected with the variable-volume vent hole through the first channel and the second channel.
Preferably, the height of the variable-volume cylinder is H, the sum of the heights of the first channel and the second channel is H, and H/4 is more than or equal to H and less than or equal to H/2.
Preferably, the first and second channels are of the same height.
Preferably, pump body subassembly still includes pin and pin spring, and the varactor gleitbretter is provided with the locking groove towards one side of pin, and the pin can stretch into the locking inslot under the effect of pin spring to unload the varactor cylinder, perhaps break away from the locking groove under the varactor pressure of varactor jar, so that varactor cylinder work.
According to another aspect of the present application, there is provided a variable displacement compressor, comprising a pump body assembly as described above.
According to another aspect of the present application, there is provided an air conditioning system including a variable capacity compressor as described above.
Preferably, the air conditioning system further comprises a condenser, a throttling device and an evaporator, the evaporator is connected to the air suction pipe of the compressor, the condenser is connected to the exhaust pipe of the compressor, the variable volume tank is connected to the exhaust pipe through a first branch and connected to the air suction pipe through a second branch, a first control valve for controlling the first branch to be switched on and switched off is arranged on the first branch, and a second control valve for controlling the second branch to be switched on and switched off is arranged on the second branch.
The application provides a pump body subassembly, including two at least cylinders and varactor jar, two at least cylinders wherein are the varactor cylinder, are provided with the varactor gleitbretter on the varactor cylinder, and the afterbody of varactor gleitbretter is provided with the pneumatic drive chamber, and the pneumatic drive chamber is through ventilating flow path and varactor jar intercommunication, and the biggest volume in pneumatic drive chamber is V1, and the effective flow area minimum of the flow path of ventilating is S, and wherein the relation satisfies between S and the V1 that S/V1 is more than or equal to 0.02. The pump body assembly limits the proportional relation between the flow area of the ventilation flow path between the air driving cavity and the variable volume tank and the maximum volume of the air driving cavity, the flow area of the ventilation flow path is related to the maximum volume of the air driving cavity, so that the effective area of the ventilation flow path can be increased, liquid refrigerants can be effectively stored at the tail of a sliding sheet of the variable volume cylinder, the problem of large pressure pulsation at the tail of the sliding sheet is solved, abnormal noise of a compressor is avoided, and user experience is improved.
Drawings
FIG. 1 is a schematic diagram of an air conditioning system according to an embodiment of the present application;
FIG. 2 is a schematic structural view of a pump block assembly according to an embodiment of the present application;
FIG. 3 is an exploded view of the pump body assembly according to one embodiment of the present application;
fig. 4 and 5 are schematic diagrams of pressure pulsation generation of a variable displacement compressor according to an embodiment of the present application;
FIG. 6 is a graph illustrating a variation between a crank angle and a pressure of the variable displacement compressor according to an embodiment of the present application;
FIG. 7 is a graph of S/V1 versus pressure pulsation for a variable displacement compressor in accordance with an embodiment of the present application;
FIG. 8 is a graph of V2/V1 vs. Δ P2/Δ P1 for a variable capacity compressor according to an embodiment of the present application;
FIG. 9 is an exploded view of the assembled pump body assembly of one embodiment of the present application;
FIG. 10 is a cross-sectional view of the pneumatic drive chamber of the pump body assembly according to one embodiment of the present application.
The reference numerals are represented as:
1. a compressor; 2. a condenser; 3. a throttling device; 4. an evaporator; 5. a first control valve; 6. a second control valve; 7. an exhaust pipe; 8. an air intake duct; 9. a connecting pipe; 10. a variable volume tank; 201. a crankshaft; 202. an upper flange; 203. an upper cylinder; 204. an upper spring; 205. an upper roller; 206. an upper sliding sheet; 207. a partition plate; 208. a lower cylinder; 209. a lower roller; 210. a lower slip sheet; 211. a lower flange; 212. a pin; 213. a pin spring; 214. a lower cover plate; 301. a ventilation flow path; 302. a pneumatic driving cavity; 303. a variable volume vent; 304. a first channel; 305. a second channel.
Detailed Description
With reference to fig. 1 to 10, according to an embodiment of the present disclosure, the pump body assembly includes at least two cylinders and a variable volume tank 10, at least one of the at least two cylinders is a variable volume cylinder, a variable volume slide is disposed on the variable volume cylinder, a pneumatic driving cavity 302 is disposed at a tail of the variable volume slide, the pneumatic driving cavity 302 is communicated with the variable volume tank 10 via a vent flow path 301, a maximum volume of the pneumatic driving cavity 302 is V1, a minimum effective flow area of the vent flow path 301 is S, and a relationship between S and V1 satisfies that S/V1 is greater than or equal to 0.02.
The pump body assembly limits the proportional relation between the flow area of the ventilation flow path 301 between the air driving cavity 302 and the variable volume tank 10 and the maximum volume of the air driving cavity 302, the flow area of the ventilation flow path 301 is related to the maximum volume of the air driving cavity 302, so that the effective area of the ventilation flow path 301 can be increased, liquid refrigerants can be effectively stored at the tail of a sliding vane of the variable volume cylinder, the problem that the pressure pulsation at the tail of the sliding vane is large is solved, abnormal noise of a compressor is avoided, and user experience is improved.
Specifically, the pump block assembly includes a crankshaft 201, an upper flange 202, an upper cylinder 203, an upper spring 204, an upper roller 205, an upper slide 206, a spacer 207, a lower cylinder 208, a lower roller 209, a lower slide 210, a lower flange 211, a pin 212, a pin spring 213, and a lower cover plate 214.
The lower cylinder 208 is a variable displacement cylinder. The tail of the upper sliding plate 206 is in an open structure, i.e. directly communicated with the high pressure inside the compressor, and the tail of the upper sliding plate 206 is connected with the upper spring 204, so that the upper cylinder 203 is always in a working state. The tail part of the lower sliding sheet 210 is a sealed pneumatic driving cavity 302, the pneumatic driving cavity 302 is communicated with the variable volume tank 10 through a connecting pipe 9, namely, high pressure or low pressure in the variable volume tank 10 is introduced into the tail part of the lower sliding sheet 210, so that the pneumatic driving cavity 302, namely the head part of the pin 212 can be mutually switched between high pressure and low pressure; while the tail of pin 212 remains at a low pressure at all times. When the pressure in the pneumatic driving cavity 302 is high, the pressure overcomes the spring force of the pin spring 213, so that the pin 212 is completely retracted into the pin hole, and the lower cylinder 208 is in a working state; when the pressure in the pneumatic driving chamber 302 is low, the pressure on the pin 212 is the same, and the pin 212 is acted by the spring force of the pin spring 213, so that the pin 212 extends out and locks the lower slide 210, and the lower cylinder 208 is in an unloading state.
The pump body assembly has the problems that when the system heats at low temperature, the suction superheat degree of the compressor is less than 0 due to low outdoor temperature, and the suction air of the compressor carries part of liquid refrigerant; the pneumatic driving cavity 302, the ventilation flow path 301 and the variable volume tank 10 at the tail part of the lower sliding sheet 210 can also store part of liquid refrigerant, and after the compressor is switched from a single cylinder to double cylinders for operation, the liquid refrigerant in the pneumatic driving cavity 302, the ventilation flow path 301 and the variable volume tank 10 can not be discharged in time. At the same time, the lower slide 210 will follow the lower roller 209 to reciprocate, resulting in a larger pressure pulsation in the pneumatic driving chamber 302, as shown in fig. 6, which is a pressure variation curve in the pneumatic driving chamber 302. When the pressure fluctuation in the pneumatic driving cavity 302 is large, the force applied to the tail of the lower sliding piece 210 is large, and the lower sliding piece 210 is separated from the lower roller 209 due to the fact that the tail of the lower sliding piece 210 has no spring structure, so that the compressor generates abnormal noise, and the user experience is seriously influenced.
Through experimental study, the ratio of the minimum value S of the effective flow area of the ventilation flow path 301 to the maximum volume V1 of the pneumatic drive chamber 302 is closely related to the amplitude of the pressure pulsation in the pneumatic drive chamber 302. As shown in fig. 7, which is a graph of the pressure pulsation amplitude Δ P versus S/V1, when the value of S/V1 is increased, the pressure pulsation amplitude is greatly reduced, and when the value of S/V1 is greater than or equal to 0.02, the pressure pulsation amplitude is less changed. Therefore, to minimize pressure pulsations in the pneumatic drive chamber 401 to ensure that the lower slide 210 and lower roller 209 do not disengage, S and V1 should satisfy: S/V1 is more than or equal to 0.02.
Furthermore, the pressure pulsations in the pneumatic drive chamber 302 are transmitted directly to the first control valve 5 or the second control valve 6 via the displacement vessel 10. In heating conditions, the variable volume tank 10 is connected to the condenser 2 via the first control valve 5, so that pressure pulsations in the pneumatic drive chamber 302 are directly transmitted to the internal machine, causing abnormal noise.
To solve this problem, in one embodiment, the effective volume of the varactor 10 is V2, and the relationship between V1 and V2 satisfies V2/V1 ≧ 20.
The effective volume of the variable displacement tank 10 is V2, and the amplitudes of pressure pulsation before and after the variable displacement tank 10 are Δ P1 and Δ P2, respectively. As shown in fig. 8, by increasing the value of V2/V1, the value of Δ P2/Δ P1 can be significantly reduced, which acts to attenuate pressure pulsation. In order to reduce the value of delta P2 as much as possible to ensure that the internal machine does not generate abnormal sound under the heating condition, V1 and V2 should satisfy the following conditions: V2/V1 is not less than 20.
In one embodiment, the vent flow path 301 includes a variable volume vent 303, the variable volume vent 303 being connected to the variable volume canister 10 by a connecting tube 9. In this embodiment, the varactor vent 303 is disposed on the varactor cylinder, and extends to the outer peripheral wall of the varactor cylinder, one end of the connecting pipe 9 is connected with the varactor vent 303, and the other end extends out of the varactor compressor and is connected to the varactor tank 10 located outside the varactor compressor.
In one embodiment, the vent flow path 301 further includes a first channel 304 and a second channel 305 disposed at an interval, the first channel 304 is disposed on an upper side of the variable-volume vent 303, the second channel 305 is disposed on a lower side of the variable-volume vent 303, and the variable-volume vent 303 is connected to the variable-volume vent 303 through the first channel 304 and the second channel 305. In this embodiment, the first channel 304 and the second channel 305 are disposed on the upper side and the lower side of the variable-volume vent 303, and the refrigerant entering the variable-volume vent 303 is not directly entered into the pneumatic driving cavity 302, but enters the pneumatic driving cavity 302 through the first channel 304 and the second channel 305, so that the refrigerant in the variable-volume vent 303 can be prevented from directly impacting the variable-volume slide sheet in the pneumatic driving cavity 302, the fluctuation of the variable-volume slide sheet is reduced, and the stability of the variable-volume slide sheet during operation is improved. The refrigerant in the varactor vent 303 enters into the pneumatic drive chamber 302 through the passageway of upper and lower both sides simultaneously, can make the refrigerant simultaneously to the upper and lower both sides application of force of varactor gleitbretter, avoids varactor gleitbretter to take place the slope because the atress is uneven, leads to taking place the dead phenomenon of card, perhaps leads to wearing and tearing problem because the incline.
In this embodiment, the variable displacement control structure of the variable displacement compressor includes a partition plate 207, a lower cylinder 208, a lower slider 210, and a lower flange 211. The tail part of the lower sliding sheet 210 is provided with a pneumatic driving cavity 302, and the lower cylinder 208 is also provided with a variable-volume vent hole 303. A first channel 304 and a second channel 305 are provided between the pneumatic driving chamber 302 and the positive displacement vent 303, respectively. The pneumatic driving chamber 302 is connected to the variable volume vent 303 via a first channel 304 and a second channel 305, and the variable volume vent 303 is connected to the variable volume tank 10 via a connection pipe 9. The vent channel 301 includes a first channel 304, a second channel 305, a variable volume vent 303, and a connection tube 9.
In one embodiment, the height of the varactor cylinder is H, the sum of the heights of the first channel 304 and the second channel 305 is H, and H/4 ≦ H ≦ H/2. In the present embodiment, the height of the first channel 304 is h1, and the height of the second channel 305 is h2, h is h1+ h 2. In the operation of the compressor, if h is too large, the strength of the variable-volume cylinder is insufficient, the deformation of the slide groove is increased, the abrasion between the slide groove and the variable-volume cylinder is aggravated, and the reliability of the compressor is insufficient.
In one embodiment, the heights of the first channel 304 and the second channel 305 are the same, so that the uniformity of air intake at the upper side and the lower side can be further improved, and the stability of the force structure of the variable capacity sliding vane is improved.
In one embodiment, the pump body assembly further comprises a pin 212 and a pin spring 213, a locking groove is formed in one side of the variable-volume slide sheet facing the pin 212, and the pin 212 can extend into the locking groove under the action of the pin spring 213 to unload the variable-volume cylinder or be separated from the locking groove under the variable-volume pressure of the variable-volume tank 10 to enable the variable-volume cylinder to work.
According to an embodiment of the present application, a variable displacement compressor includes a pump body assembly as described above.
According to an embodiment of the present application, an air conditioning system includes a variable displacement compressor 1, and the variable displacement compressor 1 is the above-described variable displacement compressor.
The air conditioning system further comprises a condenser 2, a throttling device 3 and an evaporator 4, the evaporator 4 is connected to an air suction pipe 8 of the compressor 1, the condenser 2 is connected to an air exhaust pipe 7 of the compressor 1, a variable volume tank 10 is connected to the air exhaust pipe 7 through a first branch and is connected to the air suction pipe 8 through a second branch, a first control valve 5 for controlling the on-off of the first branch is arranged on the first branch, and a second control valve 6 for controlling the on-off of the second branch is arranged on the second branch.
When the first control valve 5 is opened, the second control valve 6 is closed, the variable-volume tank 10 is communicated with the exhaust pipe 7, and high pressure exists in the variable-volume tank 10; when the second control valve 6 is opened, the first control valve 5 is closed, the variable volume tank 10 is communicated with the air suction pipe 6, and low pressure is generated in the variable volume tank 10, so that pressure switching in the pneumatic driving cavity 302 is realized, and variable volume control of the variable volume compressor 1 is realized.
The embodiment is not only used for the double-rotor variable-capacity compressor, but also suitable for the multi-rotor variable-capacity compressor.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, 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 application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims (10)

1. The pump body assembly is characterized by comprising at least two cylinders and a variable volume tank (10), wherein at least one of the at least two cylinders is a variable volume cylinder, a variable volume slide sheet is arranged on the variable volume cylinder, a pneumatic driving cavity (302) is arranged at the tail part of the variable volume slide sheet, the pneumatic driving cavity (302) is communicated with the variable volume tank (10) through a ventilation flow path (301), the maximum volume of the pneumatic driving cavity (302) is V1, the minimum value of the effective flow area of the ventilation flow path (301) is S, and the relation between S and V1 meets the condition that S/V1 is more than or equal to 0.02.
2. The pump body assembly according to claim 1, characterized in that the effective volume of the variable-volume canister (10) is V2, the relationship between V1 and V2 being such that V2/V1 ≧ 20.
3. The pump body assembly according to claim 1, characterized in that the vent flow path (301) comprises a variable volume vent (303), the variable volume vent (303) being connected to the variable volume canister (10) by a connecting tube (9).
4. The pump body assembly according to claim 3, wherein the vent flow path (301) further comprises a first channel (304) and a second channel (305) arranged at a distance, the first channel (304) being arranged on an upper side of the variable-volume vent hole (303), the second channel (305) being arranged on a lower side of the variable-volume vent hole (303), the variable-volume vent hole (303) being connected with the variable-volume vent hole (303) through the first channel (304) and the second channel (305).
5. The pump block assembly according to claim 4, characterized in that the height of the varactor cylinder is H, the sum of the heights of the first channel (304) and the second channel (305) is H, H/4 ≦ H ≦ H/2.
6. The pump body assembly according to claim 5, characterized in that the first channel (304) and the second channel (305) are of the same height.
7. The pump block assembly according to claim 1, characterized in that it further comprises a pin (212) and a pin spring (213), the side of the positive-displacement slide facing the pin (212) being provided with a locking groove, the pin (212) being able to be inserted into the locking groove under the action of the pin spring (213) in order to unload the positive-displacement cylinder or to be disengaged from the locking groove under the positive-displacement pressure of the positive-displacement canister (10) in order to operate the positive-displacement cylinder.
8. A variable capacity compressor comprising a pump body assembly, characterized in that it is a pump body assembly according to any one of claims 1 to 7.
9. An air conditioning system comprising a variable capacity compressor (1), characterized in that the variable capacity compressor (1) is a variable capacity compressor according to claim 8.
10. The air conditioning system according to claim 9, characterized in that the air conditioning system further comprises a condenser (2), a throttling device (3) and an evaporator (4), the evaporator (4) is connected to an air suction pipe (8) of the compressor (1), the condenser (2) is connected to an air discharge pipe (7) of the compressor (1), the variable volume tank (10) is connected to the air discharge pipe (7) through a first branch and connected to the air suction pipe (8) through a second branch, a first control valve (5) for controlling the first branch is arranged on the first branch, and a second control valve (6) for controlling the second branch is arranged on the second branch.
CN202111263527.XA 2021-10-28 2021-10-28 Pump body subassembly, variable volume compressor and air conditioning system Pending CN113883054A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111263527.XA CN113883054A (en) 2021-10-28 2021-10-28 Pump body subassembly, variable volume compressor and air conditioning system

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Application Number Priority Date Filing Date Title
CN202111263527.XA CN113883054A (en) 2021-10-28 2021-10-28 Pump body subassembly, variable volume compressor and air conditioning system

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Publication Number Publication Date
CN113883054A true CN113883054A (en) 2022-01-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115217759A (en) * 2022-07-08 2022-10-21 珠海凌达压缩机有限公司 Variable capacity air conditioning system
WO2024041002A1 (en) * 2022-08-24 2024-02-29 珠海格力电器股份有限公司 Variable-capacity compressor and air conditioning system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115217759A (en) * 2022-07-08 2022-10-21 珠海凌达压缩机有限公司 Variable capacity air conditioning system
CN115217759B (en) * 2022-07-08 2023-11-28 珠海凌达压缩机有限公司 Variable-capacity air conditioning system
WO2024041002A1 (en) * 2022-08-24 2024-02-29 珠海格力电器股份有限公司 Variable-capacity compressor and air conditioning system

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