Four-cylinder compressor structure for oxygen generator

Abstract

The four-cylinder compressor structure comprises a machine base, four air cylinder sets, two first T-shaped connecting pipes and two second T-shaped connecting pipes, each air cylinder set comprises a cylinder body, a valve plate and a cylinder cover, the valve plate is arranged on the cylinder body, the cylinder cover is arranged on the valve plate, and the first T-shaped connecting pipes and the second T-shaped connecting pipes are arranged on the machine base. A first port and a second port of the first T-shaped connecting pipe are both inserted into the side portion of a valve plate of the air cylinder set, and a first port and a second port of the second T-shaped connecting pipe are both inserted into the side portion of the valve plate of the air cylinder set. According to the four-cylinder compressor structure disclosed by the utility model, the thickness of the cylinder cover is not limited by the diameters of the first T-shaped connecting pipe and the second T-shaped connecting pipe, and the thickness of the cylinder cover can be set to be thinner, so that the overall height of the four-cylinder compressor structure can be effectively reduced, and the space occupancy rate of the four-cylinder compressor structure in the longitudinal direction inside an oxygen generator is reduced; the internal space of the oxygen generator is effectively utilized, and miniaturization of the oxygen generator is possible.

Description

Technical Field

[0001] This utility model relates to the field of oxygen generators, and in particular to a four-cylinder compressor structure for oxygen generators. Background Technology

[0002] Oxygen concentrators are widely used in homes, hospitals, sanatoriums, schools, hotels, sports venues, bars, oxygen bars, and high-altitude military stations. With people’s increasing awareness of health, the home oxygen concentrator market has gradually emerged and become an important health care device. As a home medical device, its market demand continues to grow with people’s pursuit of a healthy life.

[0003] The compressor in an oxygen concentrator is an important component. Some oxygen concentrators use a four-cylinder compressor. The two intake pipes and two exhaust pipes of the existing four-cylinder compressor are all located on the cylinder head of the cylinder assembly. Due to the limitation of the diameter of the intake and exhaust pipes, the cylinder head of the cylinder assembly is relatively thick, which increases the overall height of the four-cylinder compressor and increases the vertical space occupied by the four-cylinder compressor inside the oxygen concentrator, thus hindering the miniaturization design of the oxygen concentrator. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a four-cylinder compressor structure for an oxygen generator.

[0005] According to one aspect of the present invention, a four-cylinder compressor structure for an oxygen concentrator is provided, comprising:

[0006] Base;

[0007] The cylinder assembly comprises a cylinder body, a valve plate, and a cylinder head. The valve plate is located on the cylinder body, and the cylinder head is located on the valve plate. The cylinder head has a first concave cavity and a second concave cavity. The valve plate has an air inlet, an air outlet, a first groove, and a second groove. The air inlet and the first groove are both located in the first air chamber formed by the first concave cavity and the valve plate. The air outlet and the second groove are both located in the second air chamber formed by the second concave cavity and the valve plate.

[0008] Two first T-shaped connecting pipes,

[0009] The first port of a first T-shaped connecting pipe is inserted into the side of the valve plate of the first cylinder group and communicates with the first groove, and the second port of the first T-shaped connecting pipe is inserted into the side of the valve plate of the second cylinder group and communicates with the first groove.

[0010] The first port of another first T-shaped connecting pipe is inserted into the side of the valve plate of the third cylinder group and communicates with the first groove; the second port of the first T-shaped connecting pipe is inserted into the side of the valve plate of the fourth cylinder group and communicates with the first groove; and

[0011] Two second T-shaped connecting pipes,

[0012] The first port of a second T-shaped connecting pipe is inserted into the side of the valve plate of the first cylinder group and communicates with the second groove; the second port of the second T-shaped connecting pipe is inserted into the side of the valve plate of the second cylinder group and communicates with the second groove.

[0013] The first port of another second T-shaped connecting pipe is inserted into the side of the valve plate of the third cylinder group and communicates with the second groove. The second port of the second T-shaped connecting pipe is inserted into the side of the valve plate of the fourth cylinder group and communicates with the second groove.

[0014] The four-cylinder compressor structure of this utility model allows air to enter the first air chamber through the third port of the first T-shaped connecting pipe, the first T-shaped connecting pipe, and the first groove during cylinder intake, and then enter the cylinder body through the intake port. During cylinder exhaust, compressed air enters the second air chamber through the exhaust port, and then exits through the second groove, the second T-shaped connecting pipe, and the third port of the second T-shaped connecting pipe, thus completing the intake-compression-exhaust process. All four cylinders operate in the same manner. Since the first and second ports of the first T-shaped connecting pipe and the second T-shaped connecting pipe are both located on the side of the valve plate, the thickness of the cylinder head is not limited by the diameter of the first and second T-shaped connecting pipes. The cylinder head thickness can be set to be thinner, thereby effectively reducing the overall height of the four-cylinder compressor structure and reducing the longitudinal space occupancy of the four-cylinder compressor structure inside the oxygen concentrator. This effectively utilizes the internal space of the oxygen concentrator and provides a possibility for the miniaturization of the oxygen concentrator.

[0015] Furthermore, the first groove is provided with a first slope, and the second groove is provided with a second slope.

[0016] Therefore, the first ramp allows air to smoothly enter the first air chamber from the first T-shaped connecting pipe, reducing the resistance to air entering the first air chamber, and the second ramp allows compressed air to smoothly enter the second T-shaped connecting pipe from the second air chamber, reducing the resistance to air entering the second T-shaped connecting pipe.

[0017] Furthermore, it also includes a first sealing ring and a second sealing ring. The valve plate is provided with a first receiving groove and a second receiving groove. The first receiving groove surrounds the outer periphery of the air inlet and the first groove, and the second receiving groove surrounds the outer periphery of the air outlet and the second groove. The first sealing ring is received in the first receiving groove, and the second sealing ring is received in the second receiving groove. The first sealing ring surrounds the outer periphery of the port of the first cavity, and the second sealing ring surrounds the outer periphery of the port of the second cavity.

[0018] Therefore, the first sealing ring can improve the sealing performance of the first air chamber formed by the first cavity and the valve plate, preventing air leakage, and the second sealing ring can improve the sealing performance of the second air chamber formed by the second cavity and the valve plate, preventing air leakage.

[0019] Furthermore, the thickness of the first sealing ring is greater than the depth of the first receiving groove, and the thickness of the second sealing ring is greater than the depth of the second receiving groove.

[0020] Therefore, when the cylinder head is installed on the valve plate, the first and second sealing rings are squeezed between the cylinder head and the valve plate, thereby further improving the sealing performance of the first and second air chambers.

[0021] Furthermore, the first sealing ring and the second sealing ring are integrally connected.

[0022] Therefore, the integrated first and second sealing rings can be installed or removed as a whole at once, improving installation and disassembly efficiency.

[0023] Furthermore, a resettable and adjustable first suction plate is provided on the end face of the valve plate near the cylinder body. The first suction plate can be attached to or detached from the air inlet. The first suction plate is used to adjust the two ends of the air inlet to be separated or connected. A resettable and adjustable second suction plate is provided on the end face of the valve plate away from the cylinder body. The second suction plate can be attached to or detached from the air outlet. The second suction plate is used to adjust the two ends of the air outlet to be separated or connected.

[0024] Therefore, when the cylinder assembly draws air, the first suction plate is pushed away from the air inlet by the air pressure. The two ends of the air inlet are connected, and air can enter the cylinder body through the third port of the first T-shaped connecting pipe, the first T-shaped connecting pipe, the first groove, the first air chamber, and the air inlet. At the same time, the air pressure presses the second suction plate against the end face of the valve plate away from the cylinder body. The second suction plate is attached to the air outlet. The two ends of the air outlet are separated, and the air pressure inside the cylinder body cannot be output through the air outlet. The cylinder assembly is in the air intake state. Similarly, when the cylinder assembly exhausts air, the second suction plate is pushed away from the air outlet by the air pressure. The two ends of the air outlet are connected, and compressed air is discharged through the air outlet, the second air chamber, the second groove, the second T-shaped connecting pipe, and the third port of the second T-shaped connecting pipe. At the same time, the air pressure presses the first suction plate against the end face of the valve plate near the cylinder body. The first suction plate is attached to the air inlet. The two ends of the air inlet are separated, and the air pressure inside the cylinder body cannot be output through the air inlet. The cylinder assembly is in the exhaust state.

[0025] Furthermore, a pneumatic quick connector is provided on the third port of the first T-shaped connecting pipe.

[0026] Therefore, the third port of the first T-shaped connecting pipe can be quickly connected to the relevant pipeline in the oxygen generator via a pneumatic quick-connect fitting.

[0027] Furthermore, a pneumatic quick connector is provided on the third port of the second T-shaped connecting pipe.

[0028] Therefore, the third port of the second T-shaped connecting pipe can be quickly connected to the relevant pipeline in the oxygen generator via a pneumatic quick-connect fitting.

[0029] Furthermore, two cylinder groups are arranged vertically opposite each other on the base, and two other cylinder groups are arranged vertically opposite each other on the base. Two cylinder groups are arranged horizontally opposite each other on the base, and two other cylinder groups are arranged horizontally opposite each other on the base.

[0030] Therefore, the four cylinder banks are compactly mounted on the engine base.

[0031] Furthermore, a first T-shaped connecting pipe and a second T-shaped connecting pipe are located between the two valve plates of two cylinder groups arranged opposite to each other, and another first T-shaped connecting pipe and another second T-shaped connecting pipe are located between the two valve plates of another two cylinder groups arranged opposite to each other.

[0032] Therefore, the thickness of the cylinder head is not limited by the diameters of the two first T-shaped connecting pipes and the two second T-shaped connecting pipes, and the thickness of the cylinder head can be set to be thinner, thereby effectively reducing the overall height of the four-cylinder compressor structure. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a four-cylinder compressor for an oxygen generator according to the present invention;

[0034] Figure 2 for Figure 1 The diagram shown is a structural schematic of a four-cylinder compressor with the top two cylinder heads, the first sealing ring, and the second sealing ring concealed along direction A.

[0035] Figure 3 for Figure 1 The diagram shows a disassembled structure of a four-cylinder compressor.

[0036] Figure 4 for Figure 3 A schematic diagram of the four-cylinder compressor structure from another perspective. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. It should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two elements.

[0039] See Figures 1 to 4 The four-cylinder compressor structure used in oxygen concentrators includes a base 1, four cylinder groups 2, two first T-shaped connecting pipes 3, two second T-shaped connecting pipes 4, a first sealing ring 5, a second sealing ring 6, and a pneumatic quick connector 7.

[0040] See Figure 1 , Figure 3 and Figure 4 The arrangement of the four cylinder groups 2 is as follows: two cylinder groups 2 are mounted vertically opposite each other on the base 1, and the other two cylinder groups 2 are mounted vertically opposite each other on the base 1. At the same time, two cylinder groups 2 are arranged horizontally opposite each other on the base 1, and the other two cylinder groups 2 are also arranged horizontally opposite each other on the base 1. The four cylinder groups 2 are compactly mounted on the base 1. This arrangement of the four cylinder groups 2 is existing technology, and the specific installation method will not be described in detail. A coaxial motor with dual-end output is installed in the base 1. The coaxial motor is used to drive the four cylinder groups 2 to move, so that the four cylinder groups 2 can perform air extraction-compressed air-exhaust.

[0041] The four cylinder groups 2 have the same structure. The structure of one cylinder group 2 will be used as an example for explanation.

[0042] See Figures 1 to 4 The cylinder assembly 2 includes a cylinder body 21, a valve plate 22, and a cylinder head 23. The valve plate 22 is fixed on the cylinder body 21, and the cylinder head 23 is closed and fixed on the valve plate 22. The cylinder head 23 can be locked and fixed together with the valve plate 22 by screws.

[0043] See Figure 3 and Figure 4The cylinder head 23 has a first recess 231 and a second recess 232 formed on its end face near the valve plate 22. The first recess 231 and the second recess 232 have the same shape and size and are symmetrically arranged on the cylinder head 23. The valve plate 22 has a first receiving groove 225 and a second receiving groove 226 formed on its end face. In this embodiment, the first receiving groove 225 and the second receiving groove 226 are connected. An intermediate receiving groove 220 is formed between the first receiving groove 225 and the second receiving groove 226. The intermediate receiving groove 220 and the first receiving groove 225 form a ring of receiving grooves. The intermediate receiving groove 220 and the second receiving groove 226 form a ring of receiving grooves. The first sealing ring 5 and the second sealing ring 6 are integrally connected. The first sealing ring 5 and the second sealing ring 6 share the middle connecting part 56. The overall shape and size of the first sealing ring 5 and the second sealing ring 6 are appropriate to the overall shape and size of the first receiving groove 225, the intermediate receiving groove 220, and the second receiving groove 226. The first sealing ring 5 is housed in the first receiving groove 225, and the second sealing ring 6 is housed in the second receiving groove 226. The connecting portion 56 between the first sealing ring 5 and the second sealing ring 6 is housed in the intermediate receiving groove 220. The cylinder head 23 is closed and fixed on the valve plate 22. The first cavity 231 and the valve plate 22 enclose and form a first air chamber, and the second cavity 232 and the valve plate 22 enclose and form a second air chamber. The first sealing ring 5 encloses the periphery of the port of the first cavity 231, and the second sealing ring 6 encloses the periphery of the port of the second cavity 232. The first sealing ring 5 can improve the sealing performance of the first air chamber enclosed by the first cavity 231 and the valve plate 22 to prevent air leakage, and the second sealing ring 6 can improve the sealing performance of the second air chamber enclosed by the second cavity 232 and the valve plate 22 to prevent air leakage. The integrally connected first sealing ring 5 and second sealing ring 6 can be installed or disassembled as a whole at one time, improving the efficiency of installation and disassembly.

[0044] In this embodiment, the thickness of the first sealing ring 5 is greater than the depth of the first receiving groove 225, the thickness of the second sealing ring 6 is greater than the depth of the second receiving groove 226, and the thickness of the middle connecting portion 56 shared by the first sealing ring 5 and the second sealing ring 6 is greater than the depth of the middle receiving groove 220. When the cylinder head 23 is installed on the valve plate 22, the first sealing ring 5 and the second sealing ring 6 will be squeezed between the cylinder head 23 and the valve plate 22, thereby further improving the sealing performance of the first air chamber and the second air chamber.

[0045] See Figures 2 to 4The valve plate 22 has an air inlet 221, an air outlet 222, a first groove 223, and a second groove 224 formed on its end face near the cylinder head 23. The first receiving groove 225 and the intermediate receiving groove 220 surround the air inlet 221 and the first groove 223. The second receiving groove 226 and the intermediate receiving groove 220 surround the air outlet 222 and the second groove 224. The air inlet 221 and the first groove 223 are both located in the first air chamber formed by the first cavity 231 and the valve plate 22. The air outlet 222 and the second groove 224 are both located in the second air chamber formed by the second cavity 232 and the valve plate 22.

[0046] See Figure 2 A resettable and adjustable first suction plate 227 is installed on the end face of the valve plate 22 near the cylinder body 21. The first suction plate 227 can be attached to or detached from the air inlet 221 on the valve plate 22. The first suction plate 227 can adjust the two ends of the air inlet 221 to be spaced apart or connected. A resettable and adjustable second suction plate 228 is installed on the end face of the valve plate 22 away from the cylinder body 21. The second suction plate 228 can be attached to or detached from the air outlet 222 on the valve plate 22. The second suction plate 228 can adjust the two ends of the air outlet 222 to be spaced apart or connected. The first suction plate 227 and the second suction plate 228 can be made of thin, easily deformable and recoverable springs. The first suction plate 227 and the second suction plate 228 function similarly to a one-way valve. When the cylinder assembly 2 is pumped out, the first suction plate 227 is pushed off by the air pressure. The first suction plate 228 is pressed against the valve plate 22 at the end away from the cylinder 23, while the two ends of the second suction plate 228 are connected. The second suction plate 228 is attached to the exhaust port 222, which is separated from the cylinder 21. The air pressure inside the cylinder 21 cannot be output through the exhaust port 222, and the cylinder group 2 is in an intake state. Similarly, when the cylinder group 2 exhausts, the second suction plate 228 is pushed away from the exhaust port 222 by the air pressure. The two ends of the exhaust port 222 are connected. At the same time, the first suction plate 227 is pressed against the valve plate 22 at the end near the cylinder 23, while the first suction plate 227 is attached to the intake port 221, which is separated from the cylinder 21. The air pressure inside the cylinder 21 cannot be output through the intake port 221, and the cylinder group 2 is in an exhaust state.

[0047] See Figures 2 to 4 The first groove 223 has a first ramp 2231 formed therein, and the second groove 224 has a second ramp 2241 formed therein. The first ramp 2231 allows air to smoothly enter the first air chamber from the first T-shaped connecting pipe 3, reducing the resistance of air entering the first air chamber. The second ramp 2231 allows compressed air to smoothly enter the second T-shaped connecting pipe 4 from the second air chamber, reducing the resistance of air entering the second T-shaped connecting pipe 4.

[0048] See Figures 2 to 4The first port of a first T-shaped connecting pipe 3 is inserted and fixed in the side of the valve plate 22 of the first cylinder group 2 and communicates with the first groove 223 on the valve plate 22. The second port of the first T-shaped connecting pipe 3 is inserted and fixed in the side of the valve plate 22 of the second cylinder group 2 and communicates with the first groove 223 on the valve plate 22. The first cylinder group 2 and the second cylinder group 2 are arranged opposite each other on the base 1. The first port of another first T-shaped connecting pipe 3 is inserted and fixed in the side of the valve plate 22 of the third cylinder group 2 and communicates with the first groove 223 on the valve plate 22. The second port of the first T-shaped connecting pipe 3 is inserted and fixed in the side of the valve plate 22 of the fourth cylinder group 2 and communicates with the first groove 223 on the valve plate 22. The third cylinder group 2 and the fourth cylinder group 2 are arranged opposite each other on the base 1. In order to improve the sealing performance, sealing rings can be installed on the outer walls of the first port and the second port of the first T-shaped connecting pipe 3.

[0049] See Figures 2 to 4 One port of a second T-shaped connecting pipe 4 is inserted and fixed in the side of the valve plate 22 of the first cylinder group 2 and communicates with the second groove 224 on the valve plate 22. The second port of the second T-shaped connecting pipe 4 is inserted and fixed in the side of the valve plate 22 of the second cylinder group 2 and communicates with the second groove 224 on the valve plate 22. The first cylinder group 2 and the second cylinder group 2 are arranged opposite each other on the machine base 1. One port of another second T-shaped connecting pipe 4 is inserted and fixed in the side of the valve plate 22 of the third cylinder group 2 and communicates with the second groove 224 on the valve plate 22. The second port of the second T-shaped connecting pipe 4 is inserted and fixed in the side of the valve plate 22 of the fourth cylinder group 2 and communicates with the second groove 224 on the valve plate 22. The third cylinder group 2 and the fourth cylinder group 2 are arranged opposite each other on the machine base 1. In order to improve the sealing performance, sealing rings can be installed on the outer walls of the first port and the second port of the second T-shaped connecting pipe 4.

[0050] See Figure 1 , Figure 3 and Figure 4 A first T-shaped connecting pipe 3 and a second T-shaped connecting pipe 4 are located between the two valve plates 22 of two cylinder groups 2 arranged opposite to each other on the left and right. Another first T-shaped connecting pipe 3 and another second T-shaped connecting pipe 4 are located between the two valve plates 22 of another two cylinder groups 2 arranged opposite to each other on the left and right. In this way, the thickness of the four cylinder heads 23 is not limited by the diameter of the two first T-shaped connecting pipes 3 and the two second T-shaped connecting pipes 4. The thickness of the cylinder heads 23 can be set to be thinner, thereby effectively reducing the overall height of the four-cylinder compressor structure.

[0051] See Figures 1 to 4Pneumatic quick connectors 7 are installed on the third port of each of the two first T-shaped connecting pipes 3 and the third port of each of the two second T-shaped connecting pipes 4. The third port of the first T-shaped connecting pipe 3 can be quickly connected to the relevant pipelines in the oxygen concentrator through the pneumatic quick connectors 7, and the third port of the second T-shaped connecting pipe 4 can be quickly connected to the relevant pipelines in the oxygen concentrator through the pneumatic quick connectors 7.

[0052] See Figures 1 to 4 In the four-cylinder compressor structure of this utility model, when the cylinder group 2 is pumping air, the first suction plate 227 is pushed away from the air inlet 221 by the air pressure. The two ends of the air inlet 221 are connected, and air can enter the cylinder body 21 through the third port of the first T-shaped connecting pipe 3, the first T-shaped connecting pipe 3, the first groove 223, the first air chamber, and the air inlet 221. At the same time, the air pressure presses the second suction plate 228 against the end face of the valve plate 22 away from the cylinder body 21. The second suction plate 228 is attached to the air outlet 222. The two ends of the air outlet 222 are separated, and the air pressure inside the cylinder body 21 is not... The air can be output through the air outlet 222, and the cylinder assembly 2 is in an intake state. Similarly, when the cylinder assembly 2 exhausts, the second suction plate 228 is pushed away from the air outlet 222 by the air pressure. The two ends of the air outlet 222 are connected, and the compressed air is discharged through the air outlet 222, the second air chamber, the second groove 224, the second T-shaped connecting pipe 4, and the third port of the second T-shaped connecting pipe 4. At the same time, the air pressure presses the first suction plate 227 against the end face of the valve plate 22 near the cylinder body 21. The first suction plate 227 is attached to the air inlet 221, and the two ends of the air inlet 221 are separated. The cylinder body 21 The internal air pressure cannot be output through the air inlet 221, and cylinder group 2 is in the exhaust state; when cylinder group 2 draws air, air enters the cylinder body 21 through the third port of the first T-shaped connecting pipe 3; when cylinder group 2 exhausts air, compressed air is discharged from the third port of the second T-shaped connecting pipe 4 through the air outlet 222, thus completing the process of intake-compression-exhaust. All four cylinder groups 2 work in the same way; in the four-cylinder compressor structure of this utility model, since the first and second ports of the two first T-shaped connecting pipes 3 are both located on the side of the valve plate 22, and the two second T-shaped connecting pipes 222 are located on the side of the valve plate 22, the four cylinder groups 2 work in the same way. The first and second ports of the T-shaped connecting pipe 4 are both located on the side of the valve plate 22, which allows the thickness of the four cylinder heads 23 to be unrestricted by the diameter of the first T-shaped connecting pipe 3 and the second T-shaped connecting pipe 4. The thickness of the cylinder heads 23 can be set to be thinner, thereby effectively reducing the overall height of the four-cylinder compressor structure. Moreover, there are two cylinder heads 23 in the longitudinal direction, which can further reduce the overall height of the four-cylinder compressor structure, reduce the space occupancy rate of the four-cylinder compressor structure in the longitudinal direction inside the oxygen concentrator, effectively utilize the space inside the oxygen concentrator, and provide the possibility for the miniaturization of the oxygen concentrator.

[0053] The above descriptions are merely some embodiments of this utility model, intended to illustrate the technical means of this utility model, and are not intended to limit the technical scope of this utility model. Any obvious improvements made to this utility model by those skilled in the art in conjunction with existing common knowledge fall within the protection scope of this utility model.

Claims

1. A four-cylinder compressor structure for an oxygen concentrator, characterized in that, include: Base; The cylinder assembly comprises a cylinder body, a valve plate, and a cylinder head. The valve plate is located on the cylinder body, and the cylinder head is located on the valve plate. The cylinder head has a first concave cavity and a second concave cavity. The valve plate has an air inlet, an air outlet, a first groove, and a second groove. The air inlet and the first groove are both located in the first air chamber formed by the first concave cavity and the valve plate. The air outlet and the second groove are both located in the second air chamber formed by the second concave cavity and the valve plate. Two first T-shaped connecting pipes, The first port of a first T-shaped connecting pipe is inserted into the side of the valve plate of the first cylinder group and communicates with the first groove, and the second port of the first T-shaped connecting pipe is inserted into the side of the valve plate of the second cylinder group and communicates with the first groove. The first port of another first T-shaped connecting pipe is inserted into the side of the valve plate of the third cylinder group and communicates with the first groove; the second port of the first T-shaped connecting pipe is inserted into the side of the valve plate of the fourth cylinder group and communicates with the first groove; and Two second T-shaped connecting pipes, The first port of a second T-shaped connecting pipe is inserted into the side of the valve plate of the first cylinder group and communicates with the second groove; the second port of the second T-shaped connecting pipe is inserted into the side of the valve plate of the second cylinder group and communicates with the second groove. The first port of another second T-shaped connecting pipe is inserted into the side of the valve plate of the third cylinder group and communicates with the second groove. The second port of the second T-shaped connecting pipe is inserted into the side of the valve plate of the fourth cylinder group and communicates with the second groove.

2. The four-cylinder compressor structure according to claim 1, characterized in that, The first groove has a first slope, and the second groove has a second slope.

3. The four-cylinder compressor structure according to claim 1, characterized in that, It also includes a first sealing ring and a second sealing ring. The valve plate is provided with a first receiving groove and a second receiving groove. The first receiving groove surrounds the outer periphery of the air inlet and the first groove. The second receiving groove surrounds the outer periphery of the air outlet and the second groove. The first sealing ring is received in the first receiving groove and the second sealing ring is received in the second receiving groove. The first sealing ring surrounds the outer periphery of the port of the first cavity and the second sealing ring surrounds the outer periphery of the port of the second cavity.

4. The four-cylinder compressor structure according to claim 3, characterized in that, The thickness of the first sealing ring is greater than the depth of the first receiving groove, and the thickness of the second sealing ring is greater than the depth of the second receiving groove.

5. The four-cylinder compressor structure according to claim 4, characterized in that, The first sealing ring and the second sealing ring are integrally connected.

6. The four-cylinder compressor structure according to claim 1, characterized in that, The valve plate has a resettable and adjustable first suction plate on the end face near the cylinder body. The first suction plate can be attached to or detached from the air inlet. The first suction plate is used to adjust the two ends of the air inlet to be separated or connected. The valve plate has a resettable and adjustable second suction plate on the end face away from the cylinder body. The second suction plate can be attached to or detached from the air outlet. The second suction plate is used to adjust the two ends of the air outlet to be separated or connected.

7. The four-cylinder compressor structure according to claim 1, characterized in that, A pneumatic quick connector is provided on the third port of the first T-shaped connecting pipe.

8. The four-cylinder compressor structure according to claim 1, characterized in that, The third port of the second T-shaped connecting pipe is equipped with a pneumatic quick connector.

9. The four-cylinder compressor structure according to claim 1, characterized in that, Two cylinder groups are arranged vertically opposite each other on the machine base, and two other cylinder groups are arranged vertically opposite each other on the machine base. Two cylinder groups are arranged horizontally opposite each other on the machine base, and two other cylinder groups are arranged horizontally opposite each other on the machine base.

10. The four-cylinder compressor structure according to claim 9, characterized in that, A first T-shaped connecting pipe and a second T-shaped connecting pipe are located between the two valve plates of two cylinder groups arranged opposite to each other on the left and right. Another first T-shaped connecting pipe and another second T-shaped connecting pipe are located between the two valve plates of another two cylinder groups arranged opposite to each other on the left and right.

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