Pump components, rotary compressors and air conditioners

Abstract

The present invention provides a pump body assembly, a rotary compressor and an air conditioner, which relate to the technical field of air conditioning equipment, and solve the technical problem in the prior art that the pressure difference on both sides of the vane is large, which reduces the reliability of the compressor. The pump body assembly includes a cylinder, a roller, and a first vane and a second vane arranged on the cylinder, wherein there is a gap between the first vane and the second vane in the circumferential direction of the cylinder inner cavity; the first vane and the second vane jointly separate the space between the cylinder inner cavity and the roller into an air intake cavity, an intermediate cavity and an exhaust cavity in sequence; the internal pressure of the intermediate cavity is greater than the internal air pressure of the air intake cavity and less than the internal air pressure of the exhaust cavity. The present invention forms an intermediate cavity with an intermediate pressure through two vanes, reduces the pressure difference on both sides of each vane, improves the force condition of the vane, and improves the reliability of the pump body assembly, the rotary compressor and the air conditioner.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to a pump body component, a rotary compressor and an air conditioner. Background Art

[0002] Rotary compressors are widely used due to their simple structure, small size, and smooth operation, especially in the field of household air conditioning compressors. Traditional single-cylinder rotary compressors mainly include a cylinder, a roller, and a vane. The roller rotates eccentrically against the inner wall of the cylinder, forming a periodic change in the volume of the crescent-shaped space. During the rotation of the roller, the vane is always in contact with the roller, and the crescent-shaped space volume is divided into an intake chamber and an exhaust chamber on both sides of the vane.

[0003] New environmentally friendly refrigerants such as R410A and R32 have the characteristics of high exhaust pressure. Therefore, the pressure difference on both sides of the vane is significantly larger than that of traditional refrigerants such as R22. For example, in a single-cylinder rotary compressor with R32 refrigerant, the pressure difference on both sides of the vane is 3-4MPa under some harsh working conditions, while the pressure difference is generally no more than 2MPa when using R22. When the pressure difference on both sides of the vane is large, the friction between the vane and the vane groove, the contact stress between the vane and the roller, and the offset angle of the vane will increase, ultimately reducing the reliability of the compressor.

[0004] The applicant has found that the prior art has at least the following technical problems:

[0005] In the prior art, the pump assembly of the rotary compressor is generally provided with only one vane. When using the new environmentally friendly refrigerant, the pressure difference on both sides of the vane is large, which reduces the reliability of the compressor. Summary of the invention

[0006] The purpose of the present invention is to provide a pump assembly, a rotary compressor and an air conditioner to solve the technical problem that the pressure difference between the two sides of the sliding vane is large and the reliability of the compressor is reduced in the prior art. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The pump body assembly provided by the present invention includes a cylinder, a roller, and a first slide and a second slide arranged on the cylinder, wherein a gap exists between the first slide and the second slide in the circumferential direction of the cylinder inner cavity; the first slide and the second slide together divide the space between the cylinder inner cavity and the roller into an intake cavity, an intermediate cavity and an exhaust cavity in sequence; the internal pressure of the intermediate cavity is greater than the internal air pressure of the intake cavity and less than the internal air pressure of the exhaust cavity.

[0009] Optionally, the internal air pressure of the intermediate cavity is greater than the internal air pressure of the air suction cavity and less than the internal air pressure of the air discharge cavity.

[0010] Optionally, the pump body assembly further comprises a lower flange, the lower flange is provided with an air inlet channel, and an air outlet of the air inlet channel is communicated with the intermediate cavity.

[0011] Optionally, the air inlet passage is communicated with a flash evaporator of the air conditioner, and the gas in the flash evaporator is introduced into the intermediate cavity through a conduit.

[0012] Optionally, the air intake channel includes a transverse channel and a vertical channel, and the transverse channel and the vertical channel are perpendicular to each other.

[0013] Optionally, the head ends of the first sliding plate and the second sliding plate abut against the roller, and the tail ends of the first sliding plate and the second sliding plate are connected to the cylinder.

[0014] Optionally, the cylinder is provided with a first slide groove and a second slide groove corresponding to the first slide and the second slide, and the tail ends of the first slide and the second slide can be slidably disposed in the first slide groove and the second slide groove.

[0015] Optionally, the tail ends of the first sliding plate and the second sliding plate are abutted with elastic members, and during the operation of the pump body assembly, the elastic members keep the head ends of the first sliding plate and the second sliding plate abutting against the roller through elastic force.

[0016] Optionally, the elastic member is a spring.

[0017] Optionally, the head ends of the first sliding sheet and the head ends of the second sliding sheet abut against each other.

[0018] A rotary compressor comprises a pump body assembly, wherein the pump body assembly is the above-mentioned pump body assembly.

[0019] Optionally, the rotary compressor is a single-cylinder rotary compressor.

[0020] An air conditioner comprises a single-cylinder rotary compressor, wherein the pump body assembly of the single-cylinder rotary compressor is the above-mentioned pump body assembly.

[0021] Any of the above technical solutions can at least produce the following technical effects:

[0022] The pump body assembly provided by the present invention is provided with a first slide and a second slide on the cylinder to form an intermediate cavity, wherein the internal pressure of the intermediate cavity is greater than the internal air pressure of the air suction cavity and less than the internal air pressure of the air discharge cavity. The pressure difference on both sides of the first slide is the internal pressure of the intermediate cavity minus the internal air pressure of the air suction cavity, and the pressure difference on both sides of the second slide is the internal air pressure of the air discharge cavity minus the internal pressure of the intermediate cavity. Compared with the prior art, the pressure difference on both sides of each slide is reduced, the force condition of the slide is improved, the contact stress between the slide and the roller is reduced, thereby reducing the wear of the slide, reducing the friction force at the contact position of the slide and the cylinder, and reducing the offset angle of the slide at the contact position with the cylinder, thereby improving the reliability of the pump body assembly, the rotary compressor and the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a schematic diagram of the installation positions of the first sliding plate and the second sliding plate;

[0025] Figure 2 is a schematic diagram of the lower flange;

[0026] Figure 3 It is a schematic diagram of the pump body.

[0027] In the figure, 10, cylinder; 11, first slide groove; 12, second slide groove; 13, air intake port; 14, exhaust port; 15, elastic member; 20, roller; 30, slide; 31, first slide; 32, second slide; 33, head end; 34, tail end; 40, air intake chamber; 50, middle chamber; 60, exhaust chamber; 70, lower flange; 71, air intake channel; 72, air intake port; 73, air outlet; 74, transverse channel; 75, vertical channel; 80, crankshaft; 90, upper flange. DETAILED DESCRIPTION

[0028] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0029] The present invention provides a pump body assembly, such as Figure 1-Figure 3As shown, it includes: a cylinder 10, a roller 20, and a first slide 31 and a second slide 32 arranged on the cylinder 10, and one slide is added compared with the prior art. There is a gap between the first slide 31 and the second slide 32 in the circumferential direction of the inner cavity of the cylinder 10, so a space with a certain volume is enclosed between the adjacent two sides of the first slide 31 and the second slide 32 and the inner cavity of the cylinder 10, and this space is the middle cavity 50. The first slide 31 and the second slide 32 together divide the space between the inner cavity of the cylinder 10 and the roller 20 into an air suction cavity 40, an intermediate cavity 50 and an exhaust cavity 60 in sequence, and the intermediate cavity 50 is located between the air suction cavity 40 and the exhaust cavity 60, and the air suction port 13 of the air suction cavity 40 and the exhaust port 14 of the exhaust cavity 60 are located on both sides of the intermediate cavity. The internal pressure of the intermediate cavity 50 is greater than the internal air pressure of the air suction cavity 40 and less than the internal air pressure of the exhaust cavity 60, and the internal pressure of the intermediate cavity 50 can be achieved by setting a spring, filling an elastic object such as rubber, or filling gas. The internal pressure of the middle cavity 50 is between the internal pressure of the suction cavity 40 and the internal pressure of the exhaust cavity 60. The pressure difference on both sides of the first slide 31 is the internal pressure of the middle cavity 50 minus the internal pressure of the suction cavity 40, and the pressure difference on both sides of the second slide 32 is the internal pressure of the exhaust cavity 60 minus the internal pressure of the middle cavity 50. In the prior art, the pressure difference on both sides of the slide is the internal pressure of the exhaust cavity 60 minus the internal pressure of the middle cavity 50, which is greater than the pressure difference on both sides of the first slide 31 and the second slide 32. By providing two slides 30 (including the first slide 31 and the second slide 32), the pressure difference on both sides of each slide 30 is reduced, the force of the slide 30 is improved, the contact stress between the slide 30 and the roller 20 is reduced, the wear of the slide 30 is reduced, the friction between the slide 30 and the cylinder 10 (the slide groove corresponding to the slide 30 on the cylinder) is reduced, and the offset angle of the slide 30 at the contact position with the cylinder 10 is reduced, and finally the reliability of the pump body assembly is improved. At the same time, since the pressure difference between the two sides of the second sliding vane 32 on the exhaust chamber 60 side is reduced, the leakage of the high-pressure gas in the exhaust chamber 60 at the contact position between the sliding vane 30 and the roller 20 is also reduced, thereby improving the efficiency of the pump body assembly.

[0030] As an optional embodiment, the internal air pressure of the middle cavity 50 is greater than the internal air pressure of the air suction cavity 40 and less than the internal air pressure of the air exhaust cavity 60. It is relatively simple to achieve the internal pressure of the middle cavity 50 by filling the gas to generate air pressure, and it is also relatively easy to make the internal air pressure of the middle cavity 50 greater than the internal air pressure of the air suction cavity 40 and less than the internal air pressure of the air exhaust cavity 60.

[0031] As an optional implementation, Figure 2-Figure 3As shown, the pump body assembly also includes a lower flange 70, and the lower flange 70 and the upper flange 90 are respectively located below and above the suction chamber 40, the intermediate chamber 50 and the exhaust chamber 60, so that the pump body assembly can compress the low-pressure gas in the suction chamber 40 into high-pressure gas in the exhaust chamber 60. The lower flange 70 is provided with an air inlet channel 71, and the air outlet 73 of the air inlet channel 71 is connected with the intermediate chamber 50, and the gas can be filled into the intermediate chamber 50 through the air outlet 73. Preferably, the air inlet channel 71 is connected with the flash evaporator of the air conditioner. With the development, maturity and batch application of the air-injection and re-enthalpy-increasing compressor, a secondary throttling air-injection and re-enthalpy-increasing system with a three-pipe liquid reservoir as a flash evaporator has emerged. Due to its simple system, low cost and strong feasibility, this system is also widely used in single-stage compression air conditioners. The working principle of this flash evaporator is: no matter it is refrigeration or heating, when the air replenishment and enthalpy increase function is performed, the condensed high-pressure and room-temperature liquid refrigerant enters the bottom of the flash evaporator after a throttling; when the refrigerant is discharged from the bottom, the liquid refrigerant flashes into gas instantly due to the sudden change (reduction) in pressure, and a small amount of gaseous refrigerant is inevitably present after the throttling. Under the action of buoyancy, the gaseous refrigerant is finally in the upper half of the flash evaporator; and this part of the gaseous refrigerant flows out from the air pipe of the flash evaporator that just extends into the upper space from the outside; and the liquid refrigerant in the lower half of the flash evaporator flows out of the flash evaporator and enters the throttling element for secondary throttling. The flash evaporator is arranged behind the primary throttling valve for primary throttling of the liquid refrigerant and in front of the secondary throttling valve for secondary throttling of the liquid refrigerant. The primary throttle valve throttles and reduces the pressure of the high-pressure room-temperature liquid after condensation in the condenser, and the gas pressure generated in the flash evaporator is lower than the gas pressure discharged from the exhaust chamber 60; the secondary throttle valve will further reduce the pressure of the liquid generated by the flash evaporator to the evaporator at the rear end, and enter the suction chamber 40 after evaporation in the evaporator, and the gas pressure generated is lower than the gas pressure generated in the flash evaporator. Therefore, the gas in the flash evaporator is a medium-pressure gas relative to the suction chamber 40 and the exhaust chamber 60, and the gas pressure is between the gas pressure of the suction chamber 40 and the exhaust chamber 60. The air inlet channel 71 is connected to the air supply pipeline of the flash evaporator through a conduit, and the gas is introduced into the medium-pressure chamber 50. The conduit can be a metal pipe, a plastic pipe, etc., and enters the air inlet channel 71 through the air inlet 72, and the medium-pressure gas of the flash evaporator is introduced into the intermediate chamber 50, so as to facilitate the realization that the internal air pressure of the intermediate chamber 50 is greater than the internal air pressure of the suction chamber 40 and less than the internal air pressure of the exhaust chamber 60. Preferably, the air inlet channel 71 includes a transverse channel 74 and a vertical channel 75 . The transverse channel 74 is connected to the air inlet 72 , and the vertical channel is connected to the air outlet 73 . The transverse channel 74 and the vertical channel 75 are perpendicular to each other, so as to facilitate the processing of the air inlet channel 71 on the lower flange 70 .

[0032] As an optional implementation, Figure 1As shown, the head ends 33 of the first slide 31 and the second slide 32 abut against the roller 20. When the crankshaft 80 drives the roller 20 to rotate, the head ends 33 of the first slide 31 and the second slide 32 keep abutting against the roller 20. The tail ends 34 of the first slide 31 and the second slide 32 are connected to the cylinder 10. The cylinder 10 is provided with a first slide groove 11 and a second slide groove 12 corresponding to the first slide 31 and the second slide 32. The tail ends 34 of the first slide 31 and the second slide 32 are slidably arranged in the first slide groove 11 and the second slide groove 12. When the roller 20 rotates, the roller 20 pushes the first slide 31 to move in the first slide groove 11, and the second slide 32 to move in the second slide groove 12.

[0033] As an optional implementation, Figure 1 As shown, the tail ends 34 of the first slide 31 and the second slide 32 are abutted with an elastic member 15, and the elastic member 15 can be installed in the first slide slot 11 and the second slide slot 12 respectively. During the operation of the pump body assembly, the elastic member 15 keeps the head end 33 of the first slide 31 in abutment with the roller 20 and the head end 33 of the second slide 32 in abutment with the roller 20 through elastic force, and makes the first slide 31 reciprocate in the first slide slot 11 and the second slide 32 reciprocate in the second slide slot 12. Preferably, the elastic member 15 is a spring, which can recover quickly after being compressed, so as to facilitate the reciprocating motion of the first slide 31 and the second slide 32.

[0034] As an optional implementation, the head ends 33 of the first slide 31 and the second slide 32 abut against each other. After the head ends 33 abut against each other, the angle between the first slide 31 and the second slide 32 is as small as possible, thereby making the volume of the middle cavity 50 as small as possible, so as to reduce the impact of the middle cavity 50 on the amount of high-pressure gas generated by the exhaust cavity 60 during a working cycle of the pump body assembly.

[0035] A rotary compressor includes a pump body assembly provided by the present invention. The pump body assembly provided by the present invention reduces the pressure difference between the first slide 31 and the second slide 32 through the intermediate cavity 50 formed by the first slide 31 and the second slide 32, thereby improving the reliability of the rotary compressor. Specifically, the rotary compressor is a single-cylinder rotary compressor, and the pump body assembly provided by the present invention improves the reliability of the single-cylinder rotary compressor.

[0036] An air conditioner comprises a single-cylinder rotary compressor. The single-cylinder rotary compressor adopts the pump body assembly provided by the invention, thereby reducing the pressure difference on both sides of the sliding vane of the single-cylinder rotary compressor and improving the reliability and service life of the air conditioner.

[0037] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A pump assembly, characterized in that: include: A cylinder, a roller, and a first sliding plate and a second sliding plate provided on the cylinder, wherein a gap exists between the first sliding plate and the second sliding plate in the circumferential direction of the inner cavity of the cylinder; the first sliding plate and the second sliding plate jointly separate the space between the inner cavity of the cylinder and the roller into an air intake cavity, an intermediate cavity, and an air discharge cavity in sequence; the internal pressure of the intermediate cavity is greater than the internal pressure of the air intake cavity and less than the internal pressure of the air discharge cavity; The head ends of the first sliding plate and the second sliding plate are in contact with the roller, and the tail ends of the first sliding plate and the second sliding plate are connected with the cylinder.

2. The pump assembly according to claim 1, characterized in that: The internal air pressure of the intermediate chamber is greater than the internal air pressure of the suction chamber and less than the internal air pressure of the exhaust chamber.

3. The pump assembly according to claim 1, characterized in that: The pump body assembly further comprises a lower flange, the lower flange is provided with an air inlet passage, and an air outlet of the air inlet passage is communicated with the middle cavity.

4. The pump assembly according to claim 3, characterized in that: The air inlet passage is communicated with the flash evaporator of the air conditioner, and the gas in the flash evaporator is introduced into the intermediate cavity through a conduit.

5. The pump assembly according to claim 3, characterized in that: The air intake channel includes a transverse channel and a vertical channel, and the transverse channel and the vertical channel are perpendicular to each other.

6. The pump assembly according to claim 1, characterized in that: The cylinder is provided with a first sliding plate groove and a second sliding plate groove corresponding to the first sliding plate and the second sliding plate, and the tail ends of the first sliding plate and the second sliding plate are slidably disposed in the first sliding plate groove and the second sliding plate groove.

7. The pump assembly according to claim 6, characterized in that: The tail ends of the first sliding plate and the second sliding plate are in contact with elastic members. During the operation of the pump assembly, the elastic members keep the head ends of the first sliding plate and the second sliding plate in contact with the roller through elastic force.

8. The pump assembly according to claim 7, characterized in that: The elastic member is a spring.

9. The pump assembly according to claim 1, characterized in that: The head ends of the first sliding sheet and the second sliding sheet abut against each other.

10. A rotary compressor, comprising a pump assembly, characterized in that: The pump body assembly is the pump body assembly according to any one of claims 1 to 9.

11. The rotary compressor according to claim 10, characterized in that: The rotary compressor is a single-cylinder rotary compressor.

12. An air conditioner comprising a single-cylinder rotary compressor, characterized in that: The pump body assembly of the single-cylinder rotary compressor adopts the pump body assembly as described in any one of claims 1-9.

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