Low-power-consumption compressor

Abstract

The utility model discloses a low-power-consumption compressor which comprises a first compression chamber and a second compression chamber which are arranged in a sealing structure. The chamber connecting channel is arranged between the first compression chamber and the second compression chamber in a communicating manner; and gas between the first compression chamber and the second compression chamber circulates in a reciprocating manner through alternate compression movement of the pistons in the first compression chamber and the second compression chamber. The cavity connecting channel is arranged between the first compression cavity and the second compression cavity in a communicating mode, and when a piston in the first compression cavity and a piston in the second compression cavity alternately conduct compression motion, gas between the first compression cavity and the second compression cavity can circulate in a reciprocating mode; the air pressure in the compression chamber is balanced, so that the additionally increased working amount caused by overcoming vacuum is reduced, and the power consumption of the compressor is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of oxygen production equipment, specifically relating to a low-power compressor. Background Technology

[0002] Currently, most oxygen concentrator compressors adopt a twin-cylinder design, which has the following disadvantages: relatively low exhaust efficiency, unbalanced movement, especially the internal connecting rod driving the piston, which leads to greater vibration, noise, and unstable connecting rod rotation, thus directly affecting the overall stability and efficiency of the device.

[0003] Patent CN202120945976.1 discloses a four-cylinder air compressor structure for a medical oxygen concentrator, including a body with cylinders positioned opposite each other above and below the body, the cylinders being connected to the body. Connecting components are located on both sides of the body, each component including an eccentric wheel. The eccentric wheel has an inner connecting rod interface and an outer connecting rod interface. The outer connecting rod interface is inserted into the body, while the inner connecting rod interface is located within the body. One of the outer connecting rod interfaces houses an outer connecting rod. When the prime mover output drives the outer connecting rod, the eccentric wheels on both sides of the body connect the inner and outer connecting rods. This patent effectively solves the problem of motion imbalance, making the rotational drive of the inner connecting rod more stable.

[0004] To further reduce the noise of the compressor during operation, the main housing can be made into a sealed structure. However, when the connecting rod in the crankcase on the motor side drives the piston to compress the gas in the cylinder, the gas in the crankcase will be in a vacuum state due to the movement of the connecting rod, increasing the work done by the connecting rod and thus increasing the power consumption of the compressor.

[0005] Furthermore, when an oxygen generator is working, it typically injects high-pressure gas into the molecular sieve via a compressor, achieving oxygen-nitrogen separation through pressure swing adsorption (PSA) to produce oxygen. Nitrogen, however, is often directly released into the atmosphere using the inherent pressure within the molecular sieve. This can lead to some nitrogen remaining inside the molecular sieve, thus reducing the oxygen-nitrogen separation efficiency.

[0006] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0007] This invention addresses the aforementioned problems in the prior art by proposing a low-power compressor. By setting up a chamber connection channel, gas can flow between the first and second compression chambers, which helps maintain the gas pressure balance within the compression chambers and reduces the compressor's power consumption.

[0008] A low-power compressor, comprising:

[0009] The first compression chamber and the second compression chamber are both configured with a sealed structure;

[0010] A chamber connecting channel is provided between the first compression chamber and the second compression chamber; through the alternating compression motion of the pistons in the first compression chamber and the second compression chamber, the gas between the first compression chamber and the second compression chamber flows back and forth.

[0011] In some embodiments of this application, it also includes:

[0012] An electric motor has a motor shaft that passes through the first compression chamber and the second compression chamber and drives the pistons in the first compression chamber and the second compression chamber to perform alternating compression movements. The motor shaft has an internal hollow structure to form a connecting channel between the chambers.

[0013] In some embodiments of this application, the first compression chamber includes: a first crankcase with a sealed structure, a first upper cylinder and a first lower cylinder respectively communicating with the first crankcase from the top and bottom;

[0014] The second compression chamber includes: a second crankcase with a sealed structure, and a second upper cylinder and a second lower cylinder that are respectively connected to the upper and lower parts of the second crankcase;

[0015] The motor is located between the first crankcase and the second crankcase.

[0016] In some embodiments of this application, the first compression chamber has an air inlet for introducing air into the first compression chamber and an air outlet for inputting compressed gas into the molecular sieve; the second compression chamber has an air intake port communicating with the nitrogen discharge port of the molecular sieve and an exhaust port for discharging nitrogen.

[0017] In some embodiments of this application, an air inlet is provided on one of the first upper cylinder and the first lower cylinder for introducing air into the first compression chamber, and an air outlet is provided on the other of the first upper cylinder and the first lower cylinder for inputting compressed gas into the molecular sieve; the air inlet and / or the air outlet are located on the side of the first compression chamber near the motor.

[0018] In some embodiments of this application, an intake pipe is provided on the first compression chamber to connect the upper intake chamber of the first upper cylinder and the lower intake chamber of the first lower cylinder. The intake pipe has a side intake chamber located outside the first crankcase, an upper intake pipe connected to the side intake chamber, and a lower intake pipe.

[0019] In some embodiments of this application, the first upper cylinder has a first upper cylinder head, a first upper valve plate, and an upper air inlet chamber and an upper air outlet chamber are formed between the first upper cylinder head and the first upper valve plate;

[0020] The first lower cylinder has a first lower cylinder head, a first lower valve plate, and a lower intake chamber and a lower exhaust chamber formed between the first lower cylinder head and the first lower valve plate;

[0021] The upper air intake pipe is connected to the upper air intake chamber, the lower air intake pipe is connected to the lower air intake chamber, and the air inlet is connected to either the upper air intake chamber or the lower air intake chamber.

[0022] In some embodiments of this application, the first upper cylinder has a first upper cylinder body, a first upper cylinder head, and a first upper valve plate located between the first upper cylinder body and the first upper cylinder head, with an upper intake chamber and an upper exhaust chamber formed between the first upper cylinder head and the first upper valve plate; the upper intake pipe is connected to the upper intake chamber.

[0023] In some embodiments of this application, the first lower cylinder has a first lower cylinder body, a first lower cylinder head, and a first lower valve plate located between the first lower cylinder body and the first lower cylinder head, with a lower intake chamber and a lower exhaust chamber formed between the first lower cylinder head and the first lower valve plate; the lower intake pipe is connected to the lower intake chamber.

[0024] In some embodiments of this application, a first upper air passage is provided on the first upper valve plate, and a first upper slot is provided at the lower end of the first upper air passage to match the upper end of the upper air intake pipe, wherein the upper end of the upper air intake pipe is located in the first upper slot.

[0025] In some embodiments of this application, an exhaust pipe is provided on the first compression chamber to connect the upper exhaust chamber of the first upper cylinder and the lower exhaust chamber of the first lower cylinder. The exhaust pipe has a side exhaust chamber located outside the first crankcase, an upper exhaust pipe and a lower exhaust pipe connected to the side exhaust chamber.

[0026] In some embodiments of this application, the first upper cylinder has a first upper cylinder head, a first upper valve plate, and an upper air inlet chamber and an upper air outlet chamber are formed between the first upper cylinder head and the first upper valve plate;

[0027] The first lower cylinder has a first lower cylinder head, a first lower valve plate, and a lower intake chamber and a lower exhaust chamber formed between the first lower cylinder head and the first lower valve plate;

[0028] The upper air outlet pipe is connected to the upper air outlet chamber, the lower air outlet pipe is connected to the lower air outlet chamber, and the air outlet is connected to either the upper air outlet chamber or the lower air outlet chamber.

[0029] In some embodiments of this application, the first upper cylinder has a first upper cylinder body, a first upper cylinder head, and a first upper valve plate located between the first upper cylinder body and the first upper cylinder head, with an upper intake chamber and an upper exhaust chamber formed between the first upper cylinder head and the first upper valve plate; the upper exhaust pipe is connected to the upper exhaust chamber.

[0030] In some embodiments of this application, the first lower cylinder has a first lower cylinder body, a first lower cylinder head, and a first lower valve plate located between the first lower cylinder body and the first lower cylinder head, with a lower intake chamber and a lower exhaust chamber formed between the first lower cylinder head and the first lower valve plate; the lower exhaust pipe is connected to the lower exhaust chamber.

[0031] In some embodiments of this application, one of the second upper cylinder and the second lower cylinder is provided with an air intake port communicating with the nitrogen discharge port of the molecular sieve, and the other of the second upper cylinder and the second lower cylinder is provided with an exhaust port for discharging nitrogen; the air intake port and / or exhaust port are opened on the side of the second compression chamber near the motor.

[0032] In some embodiments of this application, the air inlet or outlet provided on the first upper cylinder is offset from the air intake or exhaust port provided on the second upper cylinder in the front-rear direction.

[0033] In some embodiments of this application, an intake pipe is provided on the second compression chamber, which connects the upper intake chamber of the second upper cylinder and the lower intake chamber of the second lower cylinder. The intake pipe has a side intake chamber located outside the second crankcase, an upper intake pipe and a lower intake pipe connected to the side intake chamber.

[0034] In some embodiments of this application, an exhaust pipe is provided on the second compression chamber, which connects the upper exhaust chamber of the second upper cylinder and the lower exhaust chamber of the second lower cylinder. The exhaust pipe has a side exhaust chamber located outside the second crankcase, an upper exhaust pipe and a lower exhaust pipe connected to the side exhaust chamber.

[0035] Compared with the prior art, the advantages and positive effects of this utility model are: by setting a chamber connection channel, which is connected between the first compression chamber and the second compression chamber, when the piston in the first compression chamber and the piston in the second compression chamber alternately compress, the gas between the first compression chamber and the second compression chamber can flow back and forth, so that the gas pressure in the compression chamber is balanced, thereby reducing the extra work required to overcome the vacuum and reducing the power consumption of the compressor.

[0036] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of an embodiment of a low-power compressor proposed in this utility model;

[0039] Figure 2 for Figure 1 A structural diagram of the left-center forward view angle;

[0040] Figure 3 for Figure 1 A structural diagram of the right-center forward view angle;

[0041] Figure 4 for Figure 1 A schematic diagram of a vertical sectional structure;

[0042] Figure 5 for Figure 1 Another vertical sectional view of the structure;

[0043] Figure 6 for Figure 1 A vertical cross-sectional view of the first compression chamber.

[0044] Figure 7 for Figure 6 Enlarged structural diagram of region A in the middle;

[0045] Figure 8 for Figure 1 A vertical cross-sectional view of the second compression chamber.

[0046] Among them, the four-cylinder compressor is 100;

[0047] Motor 10; Motor shaft 11; Chamber connecting channel 111;

[0048] First compression chamber 20; First crankcase 21; First upper cylinder 22; First upper cylinder body 221; First upper cylinder head 222; Upper intake chamber 2221; Upper outlet chamber 2222; First upper valve plate 223; First upper air passage 2231; First upper piston 224; First lower cylinder 23; First lower cylinder body 231; First lower cylinder head 232; Lower intake chamber 2321; Lower outlet chamber 2322; First lower valve plate 233; First lower piston 234; Inlet 24; Outlet 25; Inlet pipe 26; Side intake chamber 261; Upper intake pipe 262; Baffle 2621; Lower intake pipe 263; Outlet pipe 27; Side outlet chamber 271; Upper outlet pipe 272; Lower outlet pipe 273;

[0049] Second compression chamber 30; second crankcase 31; second upper cylinder 32; second upper cylinder head 322; upper intake chamber 3221; upper exhaust chamber 3222; second upper valve plate 323; second upper piston 324; second lower cylinder 33; second lower cylinder head 332; lower intake chamber 3321; lower exhaust chamber 3322; second lower valve plate 333; second lower piston 334; intake port 34; exhaust port 35; intake pipe 36; upper intake pipe 362; lower intake pipe 363; exhaust pipe 37; side exhaust chamber 371; upper exhaust pipe 372; lower exhaust pipe 373. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0051] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," and "right," etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings, with the direction closer to the center of the component being "inner," and the opposite being "outer." These terms are used only for the convenience of describing this utility model and 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 this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0055] See Figures 1-8 This invention presents a low-power compressor 100, comprising a first compression chamber 20 and a second compression chamber 30, both of which are sealed. A chamber connecting channel 12 is disposed between the first compression chamber 20 and the second compression chamber 30. The alternating compression motion of the piston in the first compression chamber 20 and the piston in the second compression chamber 30 enables the reciprocating flow of gas between the two chambers. This balances the gas pressure within the compression chambers, thereby reducing the additional work required to overcome the vacuum and lowering the compressor's power consumption.

[0056] In some embodiments of this application, the compressor 100 further includes a motor 10, which has a motor shaft 11 that passes through a first compression chamber 20 and a second compression chamber 30. The motor shaft 11 drives pistons in the first compression chamber 20 and the second compression chamber 30 to perform alternating compression movements. The motor shaft 11 is configured with an internal hollow structure to form a chamber connection channel 12, that is, an axial through hole is formed on the motor shaft 11 to form the chamber connection channel 12. Forming the chamber connection channel 12 on the motor shaft 11 does not require large-scale modifications to the overall structure of the compressor, does not increase the number of complex components and manufacturing costs, and has the advantages of simple structure and ease of implementation.

[0057] In some embodiments of this application, the first compression chamber 20 includes: a first crankcase 21 with a sealed structure, and a first upper cylinder 22 and a first lower cylinder 23 respectively communicating vertically with the first crankcase 21. The second compression chamber 30 includes: a second crankcase 31 with a sealed structure, and a second upper cylinder 32 and a second lower cylinder 33 respectively communicating vertically with the second crankcase 31. The motor 10 is located between the first crankcase 21 and the second crankcase 31, which are arranged horizontally, meaning the compressor 100 is a four-cylinder compressor symmetrically arranged horizontally.

[0058] In some embodiments of this application, the first compression chamber 20 has an air inlet 24 for introducing air into the first compression chamber 20 and an air outlet 25 for inputting compressed gas into the molecular sieve. The second compression chamber 30 has an air intake 34 communicating with the nitrogen venting port of the molecular sieve and an air exhaust port 35 for discharging nitrogen. The first compression chamber 20 pressurizes the air and supplies it to the molecular sieve; the second compression chamber 30 uses negative pressure to draw out the nitrogen discharged from the molecular sieve, which is beneficial for thorough nitrogen removal from the molecular sieve and improves the working efficiency of the oxygen generation equipment.

[0059] In some embodiments of this application, the first upper cylinder 22 is provided with an air inlet 24 for introducing air into the first compression chamber 20, and the first lower cylinder 23 is provided with an air outlet 25 for inputting compressed gas into the molecular sieve. The first compression chamber 20 contains two cylinders, an air inlet 24 and an air outlet 25, which helps to reduce connecting pipelines and simplify the gas path structure. The air inlet 24 and the air outlet 25 are located on the side of the first compression chamber 20 near the motor 10, making the pipeline structure compact and reducing the space occupied on the outside of the compressor.

[0060] In some embodiments of this application, the second lower cylinder 33 is provided with an intake port 34 communicating with the nitrogen discharge port of the molecular sieve, and the second upper cylinder 32 is provided with an exhaust port 35 for discharging nitrogen; the intake port 34 and the exhaust port 35 are located on the side of the second compression chamber 30 near the motor 10. This helps to reduce the number of connecting pipes, making the gas path structure simple; and it also makes the pipe structure compact, reducing the space occupied on the outside of the compressor.

[0061] Preferably, the air inlet 24 on the first upper cylinder 22 and the exhaust port 35 on the second upper cylinder 32 are staggered in the longitudinal direction. This staggered arrangement in the longitudinal direction facilitates the installation of pipelines and avoids interference.

[0062] In some other embodiments, an air inlet 24 may be provided on the first lower cylinder 23, and an air outlet 25 may be provided on the first upper cylinder 22. Alternatively, an air intake 34 may be provided on the second upper cylinder 32, and an exhaust 35 may be provided on the second lower cylinder 33.

[0063] In some embodiments of this application, the first upper cylinder 22 has a first upper cylinder body 221, a first upper cylinder head 222, a first upper piston 224, and a first upper valve plate 223 located between the first upper cylinder body 221 and the first upper cylinder head 222. An upper intake chamber 2221 and an upper exhaust chamber 2222 are formed between the first upper cylinder head 222 and the first upper valve plate 223.

[0064] In some embodiments of this application, the first lower cylinder 23 has a first lower cylinder body 231, a first lower cylinder head 232, a first lower piston 234, and a first lower valve plate 233 located between the first lower cylinder body 231 and the first lower cylinder head 232. A lower intake chamber 2321 and a lower exhaust chamber 2322 are formed between the first lower cylinder head 232 and the first lower valve plate 233.

[0065] In some embodiments of this application, an intake pipe 26 is provided on the first compression chamber 20, connecting the upper intake chamber 2221 of the first upper cylinder 22 and the lower intake chamber 2321 of the first lower cylinder 23. The intake pipe 26 has a side intake chamber 261 located outside the first crankcase 21, an upper intake pipe 262 connected to the side intake chamber 261, and a lower intake pipe 263. The upper intake pipe 262 is connected to the upper intake chamber 2221, and the lower intake pipe 263 is connected to the lower intake chamber 2321. An intake port 24 is connected to the upper intake chamber 2221. A portion of the air entering the upper intake chamber 2221 from the intake port 24 enters the lower intake chamber 2321 through the intake pipe 26, thus simultaneously supplying gas to both the upper intake chamber 2221 and the lower intake chamber 2321 through a single intake port 24.

[0066] Preferably, a first upper vent hole 2231 is provided on the first upper valve plate 223, and a first upper slot is provided at the lower end of the first upper vent hole 2231. The first upper slot is used to match the upper end of the upper air intake pipe 262, and the upper end of the upper air intake pipe 262 is located inside the first upper slot. By providing an upper slot, it is beneficial to the installation and positioning of the upper air intake pipe 262 and the first upper vent hole 2231, and to increase the contact area. A sealing ring is provided between the first upper slot and the upper air intake pipe 262, and the sealing ring is sleeved on the outside of the upper air intake pipe 262. A radially extending flange 2621 is provided on the upper part of the upper air intake pipe 262, and the sealing ring is located on the upper side of the flange 2621.

[0067] In some embodiments of this application, an outlet pipe 27 is provided on the first compression chamber 20, connecting the upper outlet chamber 2222 of the first upper cylinder 22 and the lower outlet chamber 2322 of the first lower cylinder 23. The outlet pipe 27 has a side outlet chamber 271 located outside the first crankcase 21, an upper outlet pipe 272 connected to the side outlet chamber 271, and a lower outlet pipe 273. The upper outlet pipe 272 is connected to the upper outlet chamber 222, and the lower outlet pipe 273 is connected to the lower outlet chamber 23222. An outlet 25 is connected to the lower outlet chamber 23222. The compressed gas in the upper outlet pipe 272 enters the lower outlet chamber 23222 through the outlet pipe 27, and is then output through the outlet 25.

[0068] In some embodiments of this application, the second compression chamber 30 extracts nitrogen gas discharged from the molecular sieve by negative pressure, the second lower cylinder 33 is provided with an air intake 34 communicating with the nitrogen discharge port of the molecular sieve, and the second upper cylinder 32 is provided with an exhaust port 35 for discharging nitrogen gas; the air intake 34 and the exhaust port 35 are located on the side of the second compression chamber 30 near the motor 10.

[0069] In some embodiments of this application, the second upper cylinder 32 has a second upper cylinder head 322, a second upper valve plate 323, and a second upper piston 324, with an upper intake chamber 3221 and an upper exhaust chamber 3222 formed between the second upper cylinder head 322 and the second upper valve plate 323. The second lower cylinder 33 has a second lower cylinder head 332, a second lower valve plate 333, and a second lower piston 334, with a lower intake chamber 3321 and a lower exhaust chamber 3322 formed between the second lower cylinder head 332 and the second lower valve plate 333.

[0070] In some embodiments of this application, an intake pipe 36 is provided on the second compression chamber 30, connecting the upper intake chamber 3221 of the second upper cylinder 32 and the lower intake chamber 3321 of the second lower cylinder 33. The intake pipe 36 has a side intake chamber 361 located outside the second crankcase 31, an upper intake pipe 362 connected to the side intake chamber 361, and a lower intake pipe 363. The upper intake pipe 362 is connected to the upper intake chamber 3221, the lower intake pipe 363 is connected to the lower intake chamber 3321, and the intake port 34 is connected to the lower intake chamber 3321.

[0071] In some embodiments of this application, an exhaust pipe 37 is provided on the second compression chamber 30, connecting the upper exhaust chamber 3222 of the second upper cylinder 32 and the lower exhaust chamber 3322 of the second lower cylinder 33. The exhaust pipe 37 has a side exhaust chamber 371 located outside the second crankcase 31, an upper exhaust pipe 372 and a lower exhaust pipe 373 connected to the side exhaust chamber 371. The upper exhaust pipe 372 is connected to the upper exhaust chamber 3222, the lower exhaust pipe 373 is connected to the lower exhaust chamber 3322, and the exhaust port 35 is connected to the upper exhaust chamber 3222.

[0072] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A low power consumption compressor, characterized by, Comprise: The first compression chamber and the second compression chamber are in a sealed structure; The chamber connecting channel is communicated between the first compression chamber and the second compression chamber; through the alternating compression movement of the pistons in the first compression chamber and the second compression chamber, the gas between the first compression chamber and the second compression chamber flows reciprocally.

2. The low power consumption compressor according to claim 1, characterized in that, Also comprise: The motor has a motor shaft, the motor shaft is arranged through the first compression chamber and the second compression chamber, and drives the alternating compression movement of the pistons in the first compression chamber and the second compression chamber, and the motor shaft is in a hollow structure to form the chamber connecting channel.

3. The low-power compressor according to claim 2, wherein The first compression chamber comprises: a first compression chamber in a sealed structure, a first upper cylinder and a first lower cylinder respectively communicated with the first crankcase; The second compression chamber comprises: A second compression chamber in a sealed structure, a second upper cylinder and a second lower cylinder respectively communicated with the second crankcase; The motor is arranged between the first crankcase and the second crankcase.

4. The low power consumption compressor according to claim 3, wherein An air inlet for introducing air into the first compression chamber is arranged on one of the first upper cylinder and the first lower cylinder, and an air outlet for inputting compressed gas into a molecular sieve is arranged on the other of the first upper cylinder and the first lower cylinder; the air inlet and / or the air outlet are arranged on the side of the first compression chamber close to the motor.

5. The low power consumption compressor according to claim 4, wherein An air inlet pipeline is arranged on the first compression chamber and communicated with the upper air inlet chamber of the first upper cylinder and the lower air inlet chamber of the first lower cylinder, and the air inlet pipeline has a side air inlet chamber located outside the first crankcase, an upper air inlet pipe and a lower air inlet pipe connected with the side air inlet chamber.

6. The low power consumption compressor according to claim 5, wherein The first upper cylinder has a first upper cylinder head, a first upper valve plate, and an upper air inlet chamber and an upper air outlet chamber formed between the first upper cylinder head and the first upper valve plate; The first lower cylinder has a first lower cylinder head, a first lower valve plate, and a lower air inlet chamber and a lower air outlet chamber formed between the first lower cylinder head and the first lower valve plate; The upper air inlet pipe is connected with the upper air inlet chamber, the lower air inlet pipe is connected with the lower air inlet chamber, and the air inlet is connected with the upper air inlet chamber or the lower air inlet chamber.

7. The low power consumption compressor according to claim 4, wherein An air outlet pipeline is arranged on the first compression chamber and communicated with the upper air outlet chamber of the first upper cylinder and the lower air outlet chamber of the first lower cylinder, and the air outlet pipeline has a side air outlet chamber located outside the first crankcase, an upper air outlet pipe and a lower air outlet pipe connected with the side air outlet chamber.

8. The low power consumption compressor according to claim 7, wherein The first upper cylinder has a first upper cylinder head, a first upper valve plate, and an upper air inlet chamber and an upper air outlet chamber formed between the first upper cylinder head and the first upper valve plate; The first lower cylinder has a first lower cylinder head, a first lower valve plate, and a lower air inlet chamber and a lower air outlet chamber formed between the first lower cylinder head and the first lower valve plate; The upper air outlet pipe is connected with the upper air outlet chamber, and the lower air outlet pipe is connected with the lower air outlet chamber.

9. A low power consumption compressor according to any one of claims 3 to 8, characterized in that, One of the second upper cylinder and the second lower cylinder is provided with an air suction port communicated with a nitrogen discharge port of the molecular sieve, and the other of the second upper cylinder and the second lower cylinder is provided with a nitrogen discharge port; the air suction port and / or the nitrogen discharge port are arranged on the side of the second compression chamber close to the motor; The air inlet port or the air outlet port arranged on the first upper cylinder is staggered with the air suction port or the nitrogen discharge port arranged on the second upper cylinder in the front-rear direction.

10. The low power consumption compressor according to claim 9, wherein, The second compression chamber is provided with an air suction pipe line communicated with an upper air suction chamber of the second upper cylinder and a lower air suction chamber of the second lower cylinder, and the air suction pipe line has a side air suction chamber located outside the second crankcase, an upper air suction pipe and a lower air suction pipe connected with the side air suction chamber. The second compression chamber is provided with an air discharge pipe line communicated with an upper air discharge chamber of the second upper cylinder and a lower air discharge chamber of the second lower cylinder, and the air discharge pipe line has a side air discharge chamber located outside the second crankcase, an upper air discharge pipe and a lower air discharge pipe connected with the side air discharge chamber.

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