Rotary compressor pump body mechanism and compressor

Abstract

The rotary compressor pump body mechanism comprises an upper air cylinder, a lower air cylinder and a partition plate assembled between the upper air cylinder and the lower air cylinder, an air supplementing main channel extending inwards in the transverse direction is formed in the side face of the partition plate, and air supplementing auxiliary channels extending inwards are formed in the side face of the upper air cylinder and the side face of the lower air cylinder; the auxiliary air supply channel is provided with an air port channel longitudinally communicating the end faces of the upper cylinder and the lower cylinder. The side surfaces of the partition plate, the upper cylinder and the lower cylinder are provided with plug blocks for blocking the main air supply channel and the auxiliary air supply channel; the partition plate is further provided with an air injection channel communicating with the auxiliary air supplementing channel and the main air supplementing channel in the longitudinal direction. The end faces of the upper cylinder and the lower cylinder are provided with gulp valve seats covering the air port channels. The problems of insufficient air supply amount and refrigerant backflow of the compressor are effectively solved, and then the performance of the compressor is improved.

Description

Technical Field

[0001] The invention relates to the technical field of compressor pump bodies, in particular to a rotary compressor pump body and a compressor. Background Art

[0002] With the development of the air-conditioning industry and compressor technology, the structure of compressors has become more and more diversified, and at the same time, higher requirements have been placed on the capabilities of compressors. The air-supply reheat compressor is a type of compressor with strong heating capabilities under low temperature conditions. There are two main types of reheat compressors under the existing technology. One is to set a one-way valve on the end face of the cylinder, and an air-supply port on the side of the cylinder. The refrigerant enters the one-way valve opening from the air-supply channel and is discharged directly into the cylinder cavity. The other is to set the air-supply channel in the radial and axial directions of the partition in the middle of the pump body. The refrigerant enters through the radial channel and then enters the upper and lower cylinder cavities respectively from the axial channel. This method is prone to the problem of refrigerant reflux.

[0003] In order to avoid the refrigerant backflow phenomenon, the prior art can eliminate this effect by setting a one-way valve structure on the end face of the partition, but the phenomenon of insufficient air supply will still occur. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a rotary compressor pump body mechanism and a compressor to solve the problem of insufficient air supply or refrigerant reflux in the existing air supply and enthalpy increase compressor.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a rotary compressor pump body mechanism, including an upper cylinder and a lower cylinder and a partition plate installed between the upper cylinder and the lower cylinder, wherein:

[0006] The side of the partition is provided with a main air supply channel extending inwardly in the transverse direction, and the side of the upper cylinder and the lower cylinder are provided with secondary air supply channels extending inwardly;

[0007] The air supply auxiliary channel is provided with an air port channel longitudinally connecting the end surfaces of the upper cylinder and the lower cylinder;

[0008] The partition is also provided with an air injection channel longitudinally connecting the air supply auxiliary channel and the air supply main channel;

[0009] The end surfaces of the upper cylinder and the lower cylinder are provided with air replenishing valve seats covering the air port passage.

[0010] As a further improvement of the present invention: the side surfaces of the partition plate, the upper cylinder and the lower cylinder are provided with plugs for blocking the main air supply channel and the auxiliary air supply channel;

[0011] The air supplementary channel comprises a first air supplementary channel extending laterally inwardly along the side surface of the upper cylinder. The plug is connected to the air port of the first air supplementary channel on the side surface of the upper cylinder. The plug is used to block the first air supplementary channel.

[0012] As a further improvement of the present invention: the auxiliary air supply channel also includes a second air supply channel extending laterally inward along the side of the lower cylinder, the plug is connected to the air port of the second air supply channel on the side of the lower cylinder, and the plug is used to block the second air supply channel.

[0013] As a further improvement of the present invention: the air port channel includes a third air supply channel connecting the first air supply channel and the upper cylinder end surface along the longitudinal direction of the upper cylinder, and a fourth air supply channel connecting the first air supply channel and the upper cylinder end surface along the longitudinal direction of the upper cylinder.

[0014] As a further improvement of the present invention: the air port channel includes a third air supply channel connecting the second air supply channel and the end face of the lower cylinder along the longitudinal direction of the lower cylinder, and a fourth air supply channel connecting the second air supply channel and the end face of one side of the upper cylinder along the longitudinal direction of the upper cylinder. The third air supply channel and the fourth air supply channel of the upper cylinder are arranged opposite to the third air supply channel and the fourth air supply channel of the lower cylinder.

[0015] As a further improvement of the present invention: the jet channel is provided with a first jet channel and a second jet channel connected to the two end surfaces of the partition, the first jet channel is connected to the third air supply channel and the air supply main channel, and the second jet channel is connected to the fourth air supply channel and the air supply main channel.

[0016] As a further improvement of the present invention: the air supply valve seat is arranged on the third air supply channel to cover the third air supply channel, the third air supply channel is also arranged on the side close to the inner circle of the pump body, and the first jet channel is arranged between the third air supply channel and the inner circle of the pump body.

[0017] As a further improvement of the present invention: the air supply valve seat is provided with a baffle and a valve plate, the valve plate can detachably cover the third air supply channel, the upper cylinder and the lower cylinder are respectively fixedly connected to the baffle, and the baffle is used to limit the opening of the valve plate.

[0018] As a further improvement of the present invention: the main air supply channel has a first minimum cross-sectional area Sb, the air injection channel has a second minimum cross-sectional area Sp, and the first minimum cross-sectional area Sb and the second minimum cross-sectional area Sp are in a relationship of: 2.0<Sb / Sp<2.2.

[0019] On the other hand, the present invention selects the following technical solution: a compressor, including a rotary compressor pump body mechanism as described above.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the present invention, when the compressor is replenishing air to increase enthalpy, the refrigerant enters the compressor from the suction pipe on the shell, enters the interior of the pump body through the partition air replenishment main channel, a part of the refrigerant directly enters the air replenishment sub-channels of the upper cylinder and the lower cylinder through the jet channel at the front end of the air replenishment main channel, and the other part of the refrigerant enters the air replenishment sub-channel of the upper cylinder and the air replenishment sub-channel of the lower cylinder through the jet channel at the rear end of the air replenishment main channel, and then enters the cylinder compression chamber through the air replenishment valve seats on the upper and lower cylinders, and the lateral air ports of the upper and lower cylinders are blocked with plugs, and an enthalpy increase port is opened on the shell partition, that is, single partition air replenishment; the lateral air replenishment port of the partition is blocked with plugs, and air port channels and jet channels are opened on the upper and lower cylinders to form an enthalpy increase port, the upper and lower cylinders are connected, and the upper and lower cylinders enter the upper and lower air replenishment sub-channels through the jet channels respectively, thereby reducing the backflow of gas at the suction pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structural cross section of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the matching end surface of the upper cylinder or the lower cylinder and the partition plate of the present invention;

[0024] Figure 3 It is a schematic diagram of the end surface structure of the partition of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the plug block used in the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the plug block of the present invention.

[0027] Figure numerals: 1, lower cylinder, 2, upper cylinder, 3, partition, 4, main air supply channel, 5, second air supply channel, 6, first air supply channel, 7, second jet channel, 8, first jet channel, 9, fourth air supply channel, 10, third air supply channel, 11, air supply valve seat, 12, baffle, 13, valve plate, 14, plug. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Because the compressor uses the partition 3 to replenish air in the prior art, one way is to set the valve plate 13 of the one-way valve on the end surface of the partition 3, and the refrigerant enters the cylinder from the partition 3 through the one-way valve, which will cause the problem of insufficient air replenishment. Another way is to fix the valve plate 13 of the one-way valve on the cylinder, but it is also easy to cause the phenomenon of refrigerant backflow.

[0030] In order to solve the technical problems in the prior art, the present invention is further described in conjunction with the accompanying drawings and embodiments:

[0031] like Figures 1 to 3 As shown, an embodiment of the present invention discloses a rotary compressor pump body mechanism, comprising an upper cylinder 2 and a lower cylinder 1 and a partition 3 assembled between the upper cylinder 2 and the lower cylinder 1, wherein a main air supply channel 4 extending inwardly in the transverse direction is opened on the side of the partition 3, and an air supply auxiliary channel extending inwardly is opened on the side of the upper cylinder 2 and the lower cylinder 1; the air supply auxiliary channel is provided with an air port channel connecting the end faces of the upper cylinder 2 and the lower cylinder 1 in the longitudinal direction; the partition 3 is also provided with an injection channel connecting the air supply auxiliary channel and the main air supply channel 4 in the longitudinal direction; the end faces of the upper cylinder 2 and the lower cylinder 1 are provided with an air supply valve seat 11 covering the air port channel.

[0032] In the present invention, the rotary compressor pump body mechanism also applies a conventional pump body structure, including a crankshaft, an upper bearing, an upper cylinder 2, a middle partition 3, a lower bearing, a lower flange, a roller, a vane, an upper and lower muffler, and bolts and screws for connecting various parts, etc., wherein, in the cylinder cavity, the vane head contacts the outer circle of the roller, and divides the working volume cavity surrounded by the inner circle of the cylinder, the outer circle of the roller, and the upper and lower cylinders 1 and the end faces of the partition 3 into two, the suction cavity is connected to the pump suction port, and the discharge cavity is connected to the exhaust port.

[0033] In one embodiment of the present application, the side surfaces of the partition plate 3, the upper cylinder 2 and the lower cylinder 1 are provided with a plug 14 for blocking the main air supply channel 4 and the auxiliary air supply channel; the auxiliary air supply channel includes a first air supply channel 6 extending laterally inwardly along the side surface of the upper cylinder 2, and the plug 14 is connected to the air port of the first air supply channel 6 on the side surface of the upper cylinder 2, and the plug 14 is used to block the first air supply channel 6. Further, the auxiliary air supply channel also includes a second air supply channel 5 extending laterally inwardly along the side surface of the lower cylinder 1, and the plug 14 is connected to the air port of the second air supply channel 5 on the side surface of the lower cylinder 1, and the plug 14 is used to block the second air supply channel 5.

[0034] In one embodiment of the present application, the air port channel includes a third air supply channel 10 connecting the first air supply channel 6 and the end surface of the upper cylinder 2 along the longitudinal direction of the upper cylinder 2, and a fourth air supply channel 9 connecting the first air supply channel 6 and the end surface of the upper cylinder 2 along the longitudinal direction of the upper cylinder 2.

[0035] In one embodiment of the present application, the air port channel includes a third air supply channel 10 connecting the second air supply channel 5 and the end face of the lower cylinder 1 along the longitudinal direction of the lower cylinder 1, and a fourth air supply channel 9 connecting the second air supply channel 5 and the end face of one side of the upper cylinder 2 along the longitudinal direction of the upper cylinder 2. The third air supply channel 10 and the fourth air supply channel 9 of the upper cylinder 2 are arranged opposite to the third air supply channel 10 and the fourth air supply channel 9 of the lower cylinder 1.

[0036] In one embodiment of the present application, the jet channel is provided with a first jet channel 8 and a second jet channel 7 connected to the two end surfaces of the partition 3, the first jet channel 8 is connected to the third air supply channel 10 and the air supply main channel 4, and the second jet channel 7 is connected to the fourth air supply channel 9 and the air supply main channel 4.

[0037] In one embodiment of the present application, the air supply valve seat 11 is arranged on the third air supply channel 10 of the upper cylinder 2 and the lower cylinder 1 to cover the third air supply channel 10, and the third air supply channel 10 is also arranged on the side close to the inner circle of the pump body, and the first jet channel 8 is arranged between the third air supply channel 10 and the inner circle of the pump body.

[0038] In one embodiment of the present application, the air supply valve seat 11 is provided with a baffle 12 and a valve plate 13, and the valve plate 13 can detachably cover the third air supply channel 10. The upper cylinder 2 and the lower cylinder 1 are respectively fixedly connected to the baffle 12, and the baffle 12 is used to limit the opening of the valve plate 13.

[0039] In the present application, an upper cylinder 2 is provided with an air supply valve seat 11, which includes a valve seat located on the end face of the upper cylinder 2, and an air jet is provided on the valve seat. The air supply valve seat 11 includes a baffle 12 and a valve plate 13. The upper cylinder 2 has a first air supply channel 6 connected to the air jet along a radial direction. The channel of the first air supply channel 6 has two outlets including a third air supply channel 10 and a fourth air supply channel 9. The third air supply channel 10 connects the first air supply channel 6 and the air jet of the valve seat, that is, the air jet of the valve seat is the air jet of the third air supply channel 10, and the valve plate 13 and the baffle 12 are covered on the air jet of the third air supply channel 10. The fourth air supply channel 9 leads to the side of the upper cylinder 2, and the third air supply channel 10 leads to the same end face as the valve seat.

[0040] The lower cylinder 1 is provided with another air supply valve seat 11, which includes a valve seat located at the end face of the lower cylinder 1, and an air jet is provided on the valve seat. The air supply valve seat 11 includes a baffle 12 and a valve plate 13. The lower cylinder 1 has a first air supply channel 6 connected with the air jet along a radial direction. The channel of the first air supply channel 6 has two outlets including a third air supply channel 10 and a fourth air supply channel 9. The third air supply channel 10 connects the first air supply channel 6 and the air jet of the valve seat, that is, the air jet of the valve seat is the air jet of the third air supply channel 10, and the valve plate 13 and the baffle 12 are covered on the air jet of the third air supply channel 10. The fourth air supply channel 9 leads to the side of the lower cylinder 1, and the third air supply channel 10 leads to the same end face as the valve seat.

[0041] The first partition plate 3 jet port and the second partition plate 3 jet port are arranged on the two end surfaces of the middle partition plate 3, and the partition plate 3 is provided with a main air supply channel 4 connected with the first partition plate 3 jet port and the second partition plate 3 jet port in the radial direction. A first jet channel 8 is axially provided on both sides of the partition plate 3 exposed from the compression chambers of the upper and lower cylinders 1, and a second jet channel 7 is opened in an axial direction of the main air supply channel 4, wherein the first jet channel 8 is connected with the main air supply channel 4 and the first jet channel 8, the second partition plate 3 jet port is connected with the main air supply channel 4 and the second jet channel 7, and the first partition plate 3 jet port is connected with the third air supply channel 10, and the second partition plate 3 jet port is connected with the fourth air supply channel 9, so that the first jet channel 8 is connected with the third air supply channel 10 of the upper cylinder 2 and the lower cylinder 1, and the second jet channel 7 is connected with the fourth air supply channel 9 of the upper cylinder 2 and the lower cylinder 1.

[0042] The plug 14 is used to block the air supply ports on the sides of the upper cylinder 2, the lower cylinder 1 and the partition 3 to prevent the high-pressure gas between the upper cylinder 2 and the lower cylinder 1 and the compressor housing from flowing into the air supply channel.

[0043] In one embodiment of the present application, when the compressor is replenishing air to increase enthalpy, the refrigerant enters the compressor from the intake pipe on the shell, enters the interior of the pump body through the main air replenishment channel 4 of the partition 3, a part of the refrigerant directly passes through the first jet channel 8 and the third air replenishment channel 10, and enters the compression chamber of the upper cylinder 2 and the lower cylinder 1, and the other part of the refrigerant enters the first air replenishment channel 6 of the upper cylinder 2 and the second air replenishment channel 5 of the lower cylinder 1 through the second jet channel 7 and the fourth air replenishment channel 9, and then enters the cylinder compression chamber through the air replenishment valve seat 11 on the upper cylinder 2 and the lower cylinder 1.

[0044] Generally, the upper and lower eccentric circles of the double-cylinder crankshaft are arranged at 180 degrees. The compression chamber of the upper cylinder 2 is in the compression process. Before the pressure reaches the exhaust pressure, the lower compression chamber is in the suction stage. At this time, the gas refluxed from the upper compression chamber can enter the lower compression chamber through the first jet channel 8, reducing the reflux of gas at the suction pipe. Similarly, when the lower compression chamber is in the compression process, before the pressure reaches the exhaust pressure, the upper compression chamber is in the suction stage. At this time, the gas refluxed from the lower compression chamber can enter the upper compression chamber through the first jet channel 8, reducing the reflux of gas at the suction pipe.

[0045] According to the number of plugs 14 used and the application sites, the compressor can be flexibly converted into a single air supply, double air supply, or even a triple air supply structure. Specifically, the plug 14 is a hollow shell-like structure with an oblique angle, which is convenient for driving into the air supply ports of the upper cylinder 2, the lower cylinder 1 and the partition 3, and at the same time, the plug 14 can be pressed in more tightly under the action of external pressure. The single air supply method of the plug 14 is to use the plug 14 to block the lateral air supply ports of the upper cylinder 2 and the lower cylinder 1, and open an enthalpy increase port at the height of the shell partition 3, that is, single partition 3 air supply; the double air supply method of the plug 14 is to use the plug 14 to block the lateral air supply port of the partition 3, and open an enthalpy increase port at the height of the upper and lower cylinders 1, that is, double cylinder air supply. Generally speaking, the single air supply method using the plug 14 is that the partition 3 air supply has low cost, simple structure, double cylinder air supply, and better air supply effect.

[0046] In the air replenishment process of the present application, during the implementation of air replenishment with a single partition 3, the block 14 blocks the first air replenishment channel 6 and the second air replenishment channel 5 of the upper and lower cylinders 1 from the side, respectively, and the refrigerant enters the air replenishment main channel 4 through the air replenishment pipe on the shell assembly. During the flow of the refrigerant along the air replenishment main channel 4, a part of the refrigerant enters the first air replenishment channel 6 and the second air channel of the upper cylinder 2 and the lower cylinder 1 respectively through the second jet channel 7, and this part of the refrigerant then flows along the first air replenishment channel 6 and the second air channel into the third air replenishment channel 10, and this part of the refrigerant enters the compression chamber through the air replenishment valve seat 11 on the cylinder; the other part of the refrigerant in the air replenishment main channel 4 continues to move forward, passes through the first jet channel 8, and directly enters the compression chamber of the upper cylinder 2 and the lower cylinder 1.

[0047] In this application, when the upper cylinder 2 is in the compression process, the pressure in the compression chamber gradually increases, and the refrigerant in the compression chamber tends to flow outward. First, the air replenishment valve seat 11 on the third air replenishment channel 10 of the upper cylinder 2 prevents the refrigerant from flowing back from the third air replenishment channel 10 of the upper cylinder 2. In addition, due to the symmetrical arrangement of the eccentric circle of the crankshaft, the lower cylinder 1 is in the suction state at this time. At the same time, due to the characteristic of the fluid flowing from high pressure to low pressure, by adjusting the air replenishment pressure to be greater than the suction pressure, the valve plate 13 of the air replenishment valve seat 11 of the lower cylinder 1 in the suction state is opened, so that the refrigerant flowing back from the upper cylinder can flow directly from the first jet channel 8 to the lower cylinder 1. By setting it in this way, the air replenishment effect is enhanced by utilizing the reflux phenomenon.

[0048] Similarly, when the lower cylinder 1 is in the compression process, the pressure in the compression chamber gradually increases, and the refrigerant in the compression chamber tends to flow outward. First, the air replenishment valve seat 11 on the third air replenishment channel 10 of the lower cylinder 1 prevents the refrigerant from flowing back from the third air replenishment channel 10 of the lower cylinder 1. In addition, due to the symmetrical arrangement of the eccentric circle of the crankshaft, the upper cylinder 2 is in the suction state at this time. At the same time, due to the characteristic of the fluid flowing from high pressure to low pressure, by adjusting the air replenishment pressure to be greater than the suction pressure, the valve plate 13 of the air replenishment valve seat 11 of the upper cylinder 2 in the suction state is opened, so that the refrigerant flowing back from the lower cylinder can flow directly from the first jet channel 8 to the upper cylinder 2. By such a setting, the reflux phenomenon is used to enhance the air replenishment effect.

[0049] The design of the present application, regardless of whether the plug 14 is used to block the partition 3 or the upper cylinder 2 and the lower cylinder 1, can achieve the effect of reducing backflow and enhancing the gas replenishment capacity because the interiors thereof are interconnected.

[0050] In one embodiment of the present application, the main air supply channel 4 has a first minimum cross-sectional area Sb, and the jet channel has a second minimum cross-sectional area Sp. The first minimum cross-sectional area Sb and the second minimum cross-sectional area Sp have a relationship of: 2.0<Sb / Sp<2.2.

[0051] In the present application, there is an optimal relationship between the minimum cross-sectional area Sb of the main gas replenishment channel 4 and the minimum cross-sectional area Sp of the jet channel: 2.0<Sb / Sp<2.2, and the preferred value of Sb / Sp is 2.1. In order to ensure that the replenishment gas flows smoothly in the channel, the cross-sectional area of ​​the main gas replenishment channel 4 should be equal to the sum of the cross-sectional areas of the first jet channel 8 and the second jet channel 7. There are two tributaries in this design, so the ratio should be 2:1. However, in actual situations, the refrigerant fluid has travel loss and local pressure loss in the main gas replenishment channel 4, the first jet channel 8 and the second jet channel 7, and the Sb / Sp value of 2.1 is the most preferred.

[0052] On the other hand, another embodiment of the present invention provides a compressor, comprising a rotary compressor pump body mechanism as described in one or more of the above embodiments.

[0053] In the present application, when the compressor is replenishing air to increase enthalpy, the refrigerant enters the compressor from the suction pipe on the shell, enters the interior of the pump body through the main air replenishment channel 4 of the partition 3, and a part of the refrigerant directly enters the air replenishment auxiliary channels of the upper cylinder 2 and the lower cylinder 1 through the jet channel at the front end of the main air replenishment channel 4, and the other part of the refrigerant enters the air replenishment auxiliary channel of the upper cylinder 2 and the air replenishment auxiliary channel of the lower cylinder 1 through the jet channel at the rear end of the main air replenishment channel 4, and then enters the cylinder compression chamber through the air replenishment valve seat 11 on the upper and lower cylinders 1, and the lateral air ports of the upper and lower cylinders 1 are blocked by the plug block 14, and an enthalpy increase port is opened on the shell partition 3, that is, single partition 3 air replenishment; the lateral air replenishment port of the partition 3 is blocked by the plug block 14, and an air port channel and a jet channel are opened on the partition 3 to form an enthalpy increase port in the upper and lower cylinders 1. The upper and lower cylinders 1 are connected, and the upper and lower cylinders 1 enter the upper and lower air replenishment auxiliary channels through the jet channels respectively, thereby reducing the reflux of gas at the suction pipe.

[0054] In summary, after reading the present invention document, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical scheme and technical concept of the present invention without creative mental work, which all fall within the scope of protection of the present invention.

Claims

1. A rotary compressor pump body mechanism, characterized in that: It includes an upper cylinder and a lower cylinder and a partition plate installed between the upper cylinder and the lower cylinder, wherein: The side of the partition is provided with a main air supply channel extending inwardly in the transverse direction, and the side of the upper cylinder and the lower cylinder are provided with secondary air supply channels extending inwardly; The air supply auxiliary channel is provided with an air port channel longitudinally connecting the end surfaces of the upper cylinder and the lower cylinder; The partition is also provided with an air injection channel longitudinally connecting the air supply auxiliary channel and the air supply main channel; The end surfaces of the upper cylinder and the lower cylinder are provided with air replenishing valve seats covering the air port passage.

2. A rotary compressor pump body mechanism according to claim 1, characterized in that: The side surfaces of the partition plate, the upper cylinder and the lower cylinder are provided with plugs for blocking the main air supply channel and the auxiliary air supply channel; The air supplementary channel comprises a first air supplementary channel extending laterally inwardly along the side surface of the upper cylinder. The plug is connected to the air port of the first air supplementary channel on the side surface of the upper cylinder. The plug is used to block the first air supplementary channel.

3. A rotary compressor pump body mechanism according to claim 2, characterized in that: The auxiliary air supply channel also includes a second air supply channel extending laterally inwardly along the side of the lower cylinder. The plug is connected to the air port of the second air supply channel on the side of the lower cylinder, and the plug is used to block the second air supply channel.

4. A rotary compressor pump body mechanism according to claim 3, characterized in that: The air port channel includes a third air supplement channel connecting the first air supplement channel and the upper cylinder end surface along the longitudinal direction of the upper cylinder, and a fourth air supplement channel connecting the first air supplement channel and the upper cylinder end surface along the longitudinal direction of the upper cylinder.

5. A rotary compressor pump body mechanism according to claim 4, characterized in that: The air port channel includes a third air supply channel connecting the second air supply channel and the end face of the lower cylinder along the longitudinal direction of the lower cylinder, and a fourth air supply channel connecting the second air supply channel and the end face of one side of the upper cylinder along the longitudinal direction of the upper cylinder. The third air supply channel and the fourth air supply channel of the upper cylinder are arranged opposite to the third air supply channel and the fourth air supply channel of the lower cylinder.

6. A rotary compressor pump body mechanism according to claim 5, characterized in that: The jet channel is provided with a first jet channel and a second jet channel connected to both end surfaces of the partition, the first jet channel is connected to the third air supply channel and the air supply main channel, and the second jet channel is connected to the fourth air supply channel and the air supply main channel.

7. A rotary compressor pump body mechanism according to claim 6, characterized in that: The air supply valve seat is arranged on the third air supply channel to cover the third air supply channel, the third air supply channel is also arranged on a side close to the inner circle of the pump body, and the first jet channel is arranged between the third air supply channel and the inner circle of the pump body.

8. A rotary compressor pump body mechanism according to claim 7, characterized in that: The air supply valve seat is provided with a baffle and a valve sheet, the valve sheet can detachably cover the third air supply channel, the upper cylinder and the lower cylinder are respectively fixedly connected to the baffle, and the baffle is used to limit the opening of the valve sheet.

9. A rotary compressor pump body mechanism according to claim 1, characterized in that: The main air supply channel has a first minimum cross-sectional area Sb, and the air injection channel has a second minimum cross-sectional area Sp. The first minimum cross-sectional area Sb and the second minimum cross-sectional area Sp have a relationship of: 2.0<Sb / Sp<2.

2.

10. A compressor, characterized in that: It comprises a rotary compressor pump body mechanism as described in any one of claims 1-9.

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