Liquid cooling circulation mute oil-free compressor system with double liquid flow channels

Abstract

The invention relates to a double-liquid-flow-channel liquid cooling circulation mute oil-free compressor system, and belongs to the technical field of air compressors. The system comprises a motor main body, a detachable motor end cover and a plurality of cylinder assemblies installed at the side part of the end cover. A three-dimensional liquid cooling channel network is arranged in the motor body, the end cover and the air cylinder assembly and comprises a liquid inlet channel, a liquid outlet channel, strip-shaped channels A / B / C and a cooling liquid cavity of the air path end cover, and at least two combined channels are formed to achieve cooling liquid circulation. Cold liquid flows in from the first end cover liquid inlet channel, passes through the combined channel, the cylinder sleeve lower strip-shaped channel B, the cold liquid cavity and the upper strip-shaped channel B and then flows out from the second end cover liquid outlet channel. Four air cylinder assemblies can be designed to be cooled in groups through four combined channels, and flow balance is ensured. The problems of uneven cooling, poor sealing reliability and noise pollution of the multi-cylinder compressor are solved, and the multi-cylinder compressor is suitable for scenes with high mute requirements.

Description

Technical Field

[0001] This invention relates to the field of air compressor technology, specifically to a dual-fluid-channel liquid-cooled circulating silent oil-free compressor system. Background Technology

[0002] As a key industrial power equipment, the heat dissipation and noise issues of air compressors have long been core factors restricting technological progress. Traditional reciprocating compressors generally use air-cooled heat dissipation systems, which have the following significant drawbacks: Firstly, regarding heat dissipation efficiency, air-cooled systems rely on air convection for heat dissipation. The thermal conductivity of air-cooled systems differs by orders of magnitude from that of liquid cooling media, leading to localized overheating under high load conditions. This is particularly problematic in multi-cylinder compressors, where uneven heat dissipation between cylinders can easily cause thermal stress imbalances, accelerating piston ring wear. Secondly, at the system architecture level, a single liquid flow path cannot simultaneously cool the motor windings and cylinder components; uneven flow distribution in parallel multi-cylinder operation creates cooling dead zones; and insufficient reliability of the sealing structure leads to leakage risks, hindering the development of high-pressure liquid cooling systems. Thirdly, in terms of noise control, air-cooled systems require forced ventilation, exacerbating noise pollution, while closed-loop liquid cooling designs face the problem of radiator noise leakage. Existing noise reduction technologies mostly employ passive sound insulation, failing to achieve synergistic optimization with the thermal management system. Furthermore, regarding equipment integration, current technologies have not solved the problem of compact integration between liquid cooling components and the compressor host; external cooling systems have complex piping, resulting in high maintenance costs. In particular, the topology design of the liquid cooling circuit for multi-cylinder compressors has not yet achieved modular expansion and precise flow control.

[0003] Therefore, how to design the liquid cooling circulation system of an air compressor has become an urgent problem to be solved. Summary of the Invention

[0004] To address the problems existing in the background art, the present invention provides a dual-fluid-channel liquid-cooled circulating silent oil-free compressor system, characterized in that: it includes a motor body, a detachable motor end cover is installed at the end of the motor, the motor end cover includes a first motor end cover and a second motor end cover respectively installed at both ends of a dedicated motor; a cylinder assembly is installed on the motor end cover, the cylinder assembly includes several cylinder liners and air passage end covers installed on the side of the dedicated motor; The motor body, motor end cover, cylinder liner, and air passage end cover are provided with liquid cooling channels, which include: Liquid inlet channel is provided on the right end face of the first motor end cover; A liquid outlet channel is provided on the left end face of the second motor end cover; A strip-shaped channel C is formed on the side end face of the motor body; And the strip channel A on the side end face of the motor end cover; Two strip-shaped channels B are opened inside the cylinder liner, namely the upper strip-shaped channel B and the lower strip-shaped channel B; A cold liquid cavity is located inside the gas path end cap; the cold liquid cavity is connected to the upper strip channel B and the lower strip channel B respectively; wherein: At least two combined channels are provided, which are formed by connecting strip channel C and strip channels A on both sides; One of the combined channels is connected to the liquid inlet channel of the first motor end cap and the lower strip channel B, respectively; The other combined channel is connected to the liquid outlet channel of the second motor end cap and the upper strip channel B, respectively; The coolant enters one of the combined channels from the inlet channel of the first motor end cover, passes through the lower strip channel B, the coolant chamber, and another combined channel, and flows out from the outlet channel.

[0005] In the preferred embodiment, four cylinder assemblies are installed on the side end face of the motor end cover, namely the first cylinder assembly, the second cylinder assembly, the third cylinder assembly and the fourth cylinder assembly; There are four combination channels, namely the first combination channel, the second combination channel, the third combination channel and the fourth combination channel; The first combined channel is connected to the liquid inlet channel, the lower strip channel B of the first cylinder assembly, and the lower strip channel B of the second cylinder assembly, respectively. The second combined channel is connected to the upper strip channel B of the first cylinder assembly, the upper strip channel B of the second cylinder assembly, and the liquid outlet channel, respectively. The third combined channel is connected to the liquid inlet channel, the lower strip channel B of the third cylinder assembly, and the lower strip channel B of the fourth cylinder assembly, respectively. The fourth combined channel is connected to the upper strip channel B of the third cylinder assembly, the upper strip channel B of the fourth cylinder assembly, and the liquid outlet channel, respectively. The coolant enters the first combined channel from the inlet channel, passes through the lower strip channel B of the first cylinder assembly, the coolant chamber, and the upper strip channel B to enter the second combined channel, and flows out from the outlet channel through the second combined channel. At the same time, the coolant enters the first combined channel from the inlet channel, passes through the lower strip channel B of the second cylinder assembly, the coolant cavity, and the upper strip channel B to enter the second combined channel, and flows out from the outlet channel through the second combined channel. At the same time, the coolant enters the third combined channel from the inlet channel, passes through the lower strip channel B of the third cylinder assembly, the coolant chamber, and the upper strip channel B to enter the fourth combined channel, and flows out from the outlet channel through the fourth combined channel. At the same time, the coolant enters the third combined channel from the inlet channel, passes through the lower strip channel B of the fourth cylinder assembly, the coolant chamber, and the upper strip channel B to enter the fourth combined channel, and flows out from the outlet channel through the fourth combined channel.

[0006] In the preferred embodiment, a valve plate is installed between the cylinder liner and the air passage end cover.

[0007] In the preferred embodiment, water passage sealing rings B are installed between the cylinder liner and the motor end cover, between the cylinder liner and the valve plate, and between the valve plate and the air passage end cover.

[0008] In the preferred embodiment, a water passage end cover is installed on the side of the air passage end cover, and a water passage sealing ring C is provided between the air passage end cover and the water passage end cover.

[0009] In a preferred embodiment, a piston assembly is installed inside the motor end cover; an end cover plate is installed at the end of the motor end cover.

[0010] In the preferred embodiment, a water channel sealing ring A is installed between the motor body and the motor end cover.

[0011] In a preferred embodiment, an air pipe is provided inside the air passage end cover; the air pipe of the first cylinder assembly and the air pipe of the second cylinder assembly are connected by a connecting pipe; the air pipe of the third cylinder assembly and the air pipe of the fourth cylinder assembly are connected by a connecting pipe.

[0012] In the preferred embodiment, the system further includes a liquid pump, a radiator, and a liquid tank; wherein the liquid pump is connected to the liquid inlet channel via a pipeline, and the radiator is connected to the liquid outlet channel via a pipeline; the radiator, liquid tank, and liquid pump are connected in sequence via pipelines; the liquid tank, liquid pump, radiator, motor body, motor end cover, cylinder liner, and water circuit end cover form a liquid cooling circulation loop.

[0013] In a preferred embodiment, the system further includes a soundproof enclosure, in which the motor body, motor end cover, end cover plate, and cylinder assembly are installed; the liquid pump is installed inside the soundproof enclosure, and the radiator and liquid tank are installed outside the soundproof enclosure; the soundproof enclosure is provided with a liquid inlet and a liquid outlet, and the liquid pump and liquid tank are connected by a pipeline through the liquid inlet; the liquid outlet channel is connected to the radiator by a pipeline through the liquid outlet interface.

[0014] The beneficial effects achieved by this invention are as follows: First, this invention designs a three-dimensional circulation structure with dual liquid flow channels. Through inlet channels, outlet channels, strip channels, and coolant chambers located inside the motor end cover, cylinder liner, and air passage end cover, a multi-dimensional, interconnected cooling channel network is constructed. This three-dimensional layout overcomes the limitations of traditional unidirectional liquid cooling paths, achieving three-dimensional permeable flow of coolant between the motor body and multiple cylinder components. This design significantly improves the overall heat dissipation uniformity of core components and effectively avoids material performance degradation caused by localized overheating.

[0015] Secondly, this invention designs a multi-cylinder parallel liquid-cooled architecture. Four combined channels are used to implement grouped cooling control for the four cylinder components, employing a main-branch split liquid-cooling distribution logic. This ensures independent cooling paths for each cylinder while achieving dynamic balance of coolant flow. This architecture solves the technical problem of uneven cooling flow distribution in multi-cylinder compressors, ensuring a high degree of consistency in temperature rise among the cylinders during high-power operation and reducing the risk of thermal stress imbalance when multiple cylinders work together.

[0016] Third, this invention features an integrated sealing and modular silent structure. Through a multi-level arrangement of water-cooled sealing rings, a three-dimensional sealing system is formed at key interfaces such as the cylinder liner, valve plate, and air passage end cap. Combined with the internal and external layered layout of the silent housing, this physically isolates the operating noise of the liquid-cooled circulation system from the radiator's operating noise. This integrated structure improves the system's sealing reliability while effectively controlling the propagation path of high-frequency mechanical vibration and fluid noise, achieving a substantial reduction in compressor operating noise.

[0017] Fourth, this invention achieves a compact integration of an external circulation system. By incorporating a built-in liquid pump and externally mounted radiator and liquid tank, combined with optimized interface design of the silent enclosure, spatial decoupling of the liquid cooling circulation system from the compressor unit is achieved. This innovative configuration significantly reduces the overall size of the equipment while ensuring heat dissipation efficiency, making system maintenance and piping expansion more convenient, while avoiding the energy loss problems caused by the complex piping of traditional external cooling systems. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 It is an exploded view of the overall structure; Figure 4 This is a schematic diagram of the liquid cooling channel and the direction of liquid flow; Figure 5 This is a structural diagram of the motor end cover; Figure 6 This is a schematic diagram of the connection structure of Embodiment 2 of the present invention.

[0019] Marked in the image: 1. Motor body; 10. Strip channel C; 11. First combined channel; 12. Second combined channel; 13. Third combined channel; 14. Fourth combined channel; 2. Cylinder assembly; 2a. First cylinder assembly; 2b. Second cylinder assembly; 2c. Third cylinder assembly; 2d. Fourth cylinder assembly; 21. Cylinder liner; 211. Strip channel B; 2111. Lower strip channel B; 2112. Upper strip channel B; 22. Water passage sealing ring B; 23. Valve plate; 2 4. Gas path end cap; 241. Cold liquid chamber; 25. Water path sealing ring C; 26. Water path end cap; 3. Motor end cap; 3a. First motor end cap; 3b. Second motor end cap; 31. Liquid inlet channel; 32. Liquid outlet channel; 33. Strip channel A; 4. End cover plate; 5. Piston assembly; 6. Water path sealing ring A; 7. Connecting pipe; 81. Silent housing; 811. Liquid inlet interface; 812. Liquid outlet interface; 82. Liquid pump; 91. Radiator; 92. Liquid tank. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Reference Figures 1-6 The dual-fluid-channel liquid-cooled circulating silent oil-free compressor system of the present invention has the following structure: a motor body 1, a detachable motor end cover 3 installed at the end of the motor body 1, the motor end cover 3 includes a first motor end cover 3a and a second motor end cover 3b respectively installed at both ends of the dedicated motor; a cylinder assembly 2 is installed on the motor end cover 3, the cylinder assembly 2 includes a plurality of cylinder sleeves 21 and an air passage end cover 24 installed on the side of the dedicated motor; Liquid cooling channels are provided in the motor body 1, motor end cover 3, cylinder liner 21, and air passage end cover 24. The liquid cooling channels include: A liquid inlet channel 31 is provided on the right end face of the first motor end cover 3a; a liquid outlet channel 32 is provided on the left end face of the second motor end cover 3b; a strip channel C10 is provided on the side end face of the motor body 1; and a strip channel A33 is provided on the side end face of the motor end cover 3; two strip channels B211 are provided inside the cylinder liner 21, namely the upper strip channel B2112 and the lower strip channel B2111; a cold liquid cavity 241 is provided inside the air passage end cover 24; the cold liquid cavity 241 is connected to the upper strip channel B2112 and the lower strip channel B2111 respectively; wherein: At least two combined channels are provided, which are formed by the strip channel C10 and the strip channels A33 on both sides; one combined channel is connected to the liquid inlet channel 31 and the lower strip channel B2111 of the first motor end cover 3a respectively; the other combined channel is connected to the liquid outlet channel 32 and the upper strip channel B2112 of the second motor end cover 3b respectively; the cold liquid enters one of the combined channels from the liquid inlet channel 31 of the first motor end cover 3a, passes through the lower strip channel B2111, the cold liquid cavity 241, and the other combined channel, and flows out from the liquid outlet channel 32.

[0022] A valve plate 23 is installed between the cylinder liner 21 and the air passage end cover 24. Water passage sealing rings B22 are installed between the cylinder liner 21 and the motor end cover 3, between the cylinder liner 21 and the valve plate 23, and between the valve plate 23 and the air passage end cover 24. A water passage end cover 26 is installed on the side of the air passage end cover 24, and a water passage sealing ring C25 is provided between the air passage end cover 24 and the water passage end cover 26. A piston assembly 5 is installed inside the motor end cover 3; an end cover plate 4 is installed at the end of the motor end cover 3. A water passage sealing ring A6 is installed between the motor body 1 and the motor end cover 3. An air pipe is provided inside the air passage end cover 24; a connecting pipe 7 is provided between the air pipe of the first cylinder assembly 2a and the air pipe of the second cylinder assembly 2b; a connecting pipe 7 is provided between the air pipe of the third cylinder assembly 2c and the air pipe of the fourth cylinder assembly 2d. It also includes a liquid pump 82, a radiator 91, and a liquid tank 92; the liquid pump 82 is connected to the liquid inlet channel 31 via a pipeline, and the radiator 91 is connected to the liquid outlet channel 32 via a pipeline; the radiator 91, the liquid tank 92, and the liquid pump 82 are connected sequentially via pipelines; the liquid tank 92, the liquid pump 82, the radiator 91, the motor body 1, the motor end cover 3, the cylinder liner 21, and the water circuit end cover 26 form a liquid cooling circulation loop. It also includes a silent enclosure 81, in which the motor body 1, the motor end cover 3, the end cover plate 4, and the cylinder assembly 2 are installed; the liquid pump 82 is installed inside the silent enclosure 81, and the radiator 91 and the liquid tank 92 are installed outside the silent enclosure 81; the silent enclosure 81 is provided with a liquid inlet interface 811 and a liquid outlet interface 812, and the liquid pump 82 and the liquid tank 92 are connected via a pipeline through the liquid inlet interface 811; the liquid outlet channel 32 and the radiator 91 are connected via a pipeline through the liquid outlet interface 812.

[0023] The motor body 1 serves as the core of the system, with a strip-shaped channel C10 formed on its side end face. A liquid inlet channel 31 is formed on the right end face of the first motor end cover 3a, and a liquid outlet channel 32 is formed on the left end face of the second motor end cover 3b. A water channel sealing ring A6 is installed between the motor end cover 3 and the motor body 1, and a strip-shaped channel A33 is machined on the side end face of the end cover. The end cover plate 4 is bolted to the outer end face of the motor end cover 3 for sealing, and internally houses the piston assembly 5.

[0024] The first cylinder assembly 2a, the second cylinder assembly 2b, the third cylinder assembly 2c, and the fourth cylinder assembly 2d are evenly distributed on the side end face of the motor end cover 3. Each cylinder assembly 2 has two strip-shaped channels B211 inside its cylinder liner 21, defined as the upper strip-shaped channel B2112 and the lower strip-shaped channel B2111, respectively. The valve plate 23 connects the cylinder liner 21 to the air passage end cover 24 via bolts. The air passage end cover 24 has a coolant cavity 241 machined inside, and its air pipes are connected in parallel to the air passages of adjacent cylinder assemblies 2 via connecting pipes 7.

[0025] The inlet channel 31 connects the first combined channel 11 and the third combined channel 13, and the outlet channel 32 connects the second combined channel 12 and the fourth combined channel 14. The strip channel C10 forms a longitudinal flow channel on the side end face of the motor body 1, and the two strip channels A33 form transverse branches of the combined channel. The lower strip channel B2111 of the cylinder liner 21 connects to the inlet of the combined channel, and the upper strip channel B2112 connects to the outlet of the combined channel via the cold liquid chamber 241, forming a complete path of "inlet channel 31 → combined channel → lower strip channel B2111 → cold liquid chamber 241 → upper strip channel B2112 → combined channel → outlet channel 32".

[0026] Water circuit sealing rings B22 are installed on the contact surfaces of cylinder liner 21 and motor end cover 3, cylinder liner 21 and valve plate 23, and valve plate 23 and air circuit end cover 24, respectively. Water circuit sealing ring C25 is installed between air circuit end cover 24 and dedicated water circuit end cover 26, and water circuit end cover 26 is fixed to the outside of air circuit end cover 24 by a snap-fit ​​structure. Liquid pump 82 is connected to the liquid inlet 811 of silent housing 81 through a flange, and the liquid inlet 811 is equipped with a filter screen. Radiator 91 is connected to liquid outlet 812 through a quick connector. Liquid tank 92 is equipped with a liquid injection port and pressure balance valve on the top, and is connected to the inlet of liquid pump 82 through a metal hose at the bottom.

[0027] Example 1: In this example, four cylinder assemblies 2 are installed on the side end face of the motor end cover 3, namely the first cylinder assembly 2a, the second cylinder assembly 2b, the third cylinder assembly 2c and the fourth cylinder assembly 2d. There are four combination channels, namely the first combination channel 11, the second combination channel 12, the third combination channel 13 and the fourth combination channel 14; The first combined channel 11 is connected to the liquid inlet channel 31, the lower strip channel B2111 of the first cylinder assembly 2a, and the lower strip channel B2111 of the second cylinder assembly 2b, respectively. The second combined channel 12 is connected to the upper strip channel B2112 of the first cylinder assembly 2a, the upper strip channel B2112 of the second cylinder assembly 2b, and the liquid outlet channel 32, respectively. The third combined channel 13 is connected to the liquid inlet channel 31, the lower strip channel B2111 of the third cylinder assembly 2c, and the lower strip channel B2111 of the fourth cylinder assembly 2d, respectively. The fourth combined channel 14 is connected to the upper strip channel B2112 of the third cylinder assembly 2c, the upper strip channel B2112 of the fourth cylinder assembly 2d, and the liquid outlet channel 32, respectively. The coolant enters the first combined channel 11 from the inlet channel 31, passes through the lower strip channel B2111 of the first cylinder assembly 2a, the coolant chamber 241, and the upper strip channel B2112 to enter the second combined channel 12, and flows out from the outlet channel 32 through the second combined channel 12. Meanwhile, the coolant enters the first combined channel 11 from the inlet channel 31, passes through the lower strip channel B2111 of the second cylinder assembly 2b, the coolant cavity 241, and the upper strip channel B2112 to enter the second combined channel 12, and flows out from the outlet channel 32 through the second combined channel 12. Meanwhile, the coolant enters the third combined channel 13 from the inlet channel 31, passes through the lower strip channel B2111 of the third cylinder assembly 2c, the coolant chamber 241, and the upper strip channel B2112 to enter the fourth combined channel 14, and flows out from the outlet channel 32 through the fourth combined channel 14. Meanwhile, the coolant enters the third combined channel 13 from the inlet channel 31, passes through the lower strip channel B2111 of the fourth cylinder assembly 2d, the coolant chamber 241, and the upper strip channel B2112 to enter the fourth combined channel 14, and flows out from the outlet channel 32 through the fourth combined channel 14.

[0028] Example 2 describes a method for implementing an external circulation system in conjunction with a silent structure. In this example, the liquid pump 82 is a magnetically driven centrifugal pump with a power of 1.5kW and a rated flow rate of 120L / min. It is rigidly connected to the liquid inlet 811 of the silent housing 81 via a flange. The liquid inlet 811 uses a DN25 standard flange, with an integrated 80-mesh stainless steel filter screen inside, and an O-ring on the sealing surface of the interface. The inlet of the liquid pump 82 is connected to the bottom outlet of the liquid tank 92 via a φ32mm metal flexible hose, and the hose is wrapped with a 3mm thick silicone sound insulation sleeve.

[0029] Radiator module 91 is equipped with a tube-fin heat exchanger with a core size of 600×400×80mm, consisting of 312 φ8mm copper tubes and 0.2mm aluminum fins. The inlet of radiator 91 connects to the outlet port 812 of the silent enclosure 81 via a DN32 quick-release connector, and the outlet flows back to the top of the liquid tank 92 by gravity through a φ40mm corrugated pipe. Two sets of φ400mm axial fans are installed on the top of radiator 91, with honeycomb-shaped baffles added to the fan casing.

[0030] Liquid tank 92 is a 150L sealed container made of 304 stainless steel. It has an inlet with a breather valve and a level viewing window on the top. A conical drain valve is located at the bottom of liquid tank 92, and a PT100 temperature sensor and pressure transmitter are installed on the side wall. Its mounting bracket shares a steel base with radiator 91, with a center-to-center distance of 1.2m between them, and is fixed to the foundation with anchor bolts.

[0031] The Silent Enclosure 81 features a double-layer shell structure made of 1.5mm galvanized steel sheet. The inner layer is perforated with 2mm diameter micro-perforations, and the interlayer is filled with 50mm thick melamine foam. The door is equipped with an 8mm wide labyrinth-style sealing strip, and the door lock mechanism features a pressure-balanced valve. Six sets of M12 rubber shock absorbers are installed at the bottom of the enclosure, and a double-layered tempered glass observation window is located at the top.

[0032] A three-stage vibration isolation system is installed between the motor body 1 and the enclosure: the first stage is the rubber pad on the motor base, the second stage is the spring damper, and the third stage is the polyurethane vibration damping block of the liquid pump 82 bracket. All pipelines passing through the enclosure use flexible connecting sleeves, and the surface of the pipelines inside the enclosure is wrapped with 2mm thick flame-retardant sound-absorbing cotton.

[0033] Coolant is pressurized from tank 92 by pump 82 and injected into the system at 0.8 MPa through inlet port 811. After circulating and cooling the motor body 1 and cylinder assembly 2 inside the silent enclosure 81, the high-temperature liquid is delivered to the external radiator 91 through outlet port 812. The axial fan automatically adjusts its speed according to the temperature signal, cooling the liquid to 43±2℃ before returning it to tank 92. After the noise inside the enclosure is converted by microporous plate sound energy, absorbed by foam cotton, and isolated by a sealing structure, the measured noise value at 1m is ≤65dB(A), which is 18dB lower than that of the traditional structure.

[0034] This embodiment achieves low vibration and low noise operation while ensuring heat dissipation efficiency through the modular layout of the external circulation system and the multi-layer noise reduction design of the silent enclosure 81. It is particularly suitable for acoustically sensitive scenarios such as hospital operating rooms and scientific research laboratories.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. Dual liquid channel liquid cooled silent oil-free compressor system, characterized by: It includes a motor body, a detachable motor end cover is installed at the end of the motor body, the motor end cover includes a first motor end cover and a second motor end cover which are respectively installed at the two ends of the special motor; a cylinder assembly is installed on the motor end cover, the cylinder assembly includes a plurality of cylinder sleeves and a gas circuit end cover which are installed at the side of the special motor; The motor body, the motor end cover, the cylinder sleeve and the gas circuit end cover are provided with a liquid cooling channel, and the liquid cooling channel includes: An inlet channel is provided on the right end face of the first motor end cover; An outlet channel is provided on the left end face of the second motor end cover; A strip-shaped channel C is provided on the side end face of the motor body; And a strip-shaped channel A is provided on the side end face of the motor end cover; Two strip-shaped channels B are provided in the cylinder sleeve, which are an upper strip-shaped channel B and a lower strip-shaped channel B; A cold liquid cavity is provided in the gas circuit end cover; the cold liquid cavity is in communication with the upper strip-shaped channel B and the lower strip-shaped channel B; wherein: At least two combined channels are provided, and the combined channels are formed by the strip-shaped channel C and the strip-shaped channels A on both sides of the strip-shaped channel C; One of the combined channels is in communication with the inlet channel of the first motor end cover and the lower strip-shaped channel B; The other combined channel is in communication with the outlet channel of the second motor end cover and the upper strip-shaped channel B; The cold liquid enters one of the combined channels from the inlet channel of the first motor end cover, passes through the lower strip-shaped channel B, the cold liquid cavity, the other combined channel, and flows out from the outlet channel.

2. The double-liquid-flow-channel liquid cooling circulating silent oil-free compressor system according to claim 1, wherein: Four cylinder assemblies are installed on the side end face of the motor end cover, which are a first cylinder assembly, a second cylinder assembly, a third cylinder assembly and a fourth cylinder assembly; Four combined channels are provided, which are a first combined channel, a second combined channel, a third combined channel and a fourth combined channel; The first combined channel is in communication with the inlet channel, the lower strip-shaped channel B of the first cylinder assembly and the lower strip-shaped channel B of the second cylinder assembly; The second combined channel is in communication with the upper strip-shaped channel B of the first cylinder assembly, the upper strip-shaped channel B of the second cylinder assembly and the outlet channel; The third combined channel is in communication with the inlet channel, the lower strip-shaped channel B of the third cylinder assembly and the lower strip-shaped channel B of the fourth cylinder assembly; The fourth combined channel is in communication with the upper strip-shaped channel B of the third cylinder assembly, the upper strip-shaped channel B of the fourth cylinder assembly and the outlet channel; The cold liquid enters the first combined channel from the inlet channel, passes through the lower strip-shaped channel B of the first cylinder assembly, the cold liquid cavity and the upper strip-shaped channel B, enters the second combined channel, and flows out from the outlet channel through the second combined channel; At the same time, the cold liquid enters the first combined channel from the inlet channel, passes through the lower strip-shaped channel B of the second cylinder assembly, the cold liquid cavity and the upper strip-shaped channel B, enters the second combined channel, and flows out from the outlet channel through the second combined channel; At the same time, the cold liquid enters the third combined channel from the inlet channel, passes through the lower strip-shaped channel B of the third cylinder assembly, the cold liquid cavity and the upper strip-shaped channel B, enters the fourth combined channel, and flows out from the outlet channel through the fourth combined channel; Meanwhile, the cold liquid enters the third combined channel from the liquid inlet channel, passes through the lower strip-shaped channel B of the fourth cylinder assembly, the cold liquid cavity, the upper strip-shaped channel B of the fourth cylinder assembly, enters the fourth combined channel, and flows out from the liquid outlet channel through the fourth combined channel.

3. The dual liquid channel liquid cooled, silent, oil-less compressor system of claim 1, wherein, The valve plate is installed between the cylinder sleeve and the gas channel end cover.

4. The dual liquid channel liquid cooled, silent, oil-less compressor system of claim 3, wherein: Waterway sealing ring B is installed between the cylinder sleeve and the motor end cover, between the cylinder sleeve and the valve plate, and between the valve plate and the gas channel end cover.

5. The dual liquid channel liquid cooled, silent, oil-less compressor system of claim 1, wherein, The waterway end cover is installed on the side of the gas channel end cover, and waterway sealing ring C is arranged between the gas channel end cover and the waterway end cover.

6. The dual liquid channel liquid cooled, silent, oil-less compressor system of claim 1, wherein, The piston assembly is installed in the motor end cover, and the end cover plate is installed on the end of the motor end cover.

7. The dual liquid channel liquid cooled, silent, oil-less compressor system of claim 1, wherein, Waterway sealing ring A is installed between the motor main body and the motor end cover.

8. The dual liquid channel liquid cooled, silent, oil-less compressor system of claim 2, wherein, The gas pipes of the first and second cylinder assemblies are provided with a communication pipe, and the gas pipes of the third and fourth cylinder assemblies are provided with a communication pipe.

9. The dual-liquid channel liquid cooling circulating silent oil-free compressor system according to any one of claims 1-8, characterized in that: Further comprising a liquid pump, a radiator, and a liquid tank, wherein the liquid pump is connected to the liquid inlet channel through a pipeline, the radiator is connected to the liquid outlet channel through a pipeline, the radiator, the liquid tank, and the liquid pump are sequentially connected through pipelines, and the liquid tank, the liquid pump, and the radiator, together with the motor main body, the motor end cover, the cylinder sleeve, and the waterway end cover, form a liquid cooling circulation loop.

10. The dual liquid channel liquid cooled, silent, oil-less compressor system of claim 9, wherein, Further comprising a silent box body, wherein the motor main body, the motor end cover, the end cover plate, and the cylinder assembly are installed in the silent box body, the liquid pump is installed in the silent box body, the radiator and the liquid tank are installed outside the silent box body, the silent box body is provided with a liquid inlet interface and a liquid outlet interface, the liquid pump and the liquid tank are connected through the liquid inlet interface, and the liquid outlet channel and the radiator are connected through the liquid outlet interface.

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