AIR COMPRESSOR CYLINDER
An air compressor cylinder includes a crankcase, a piston cylinder, a piston, and a soundproof cover. The crankcase is equipped with a crank connecting rod assembly connected to the output shaft of a motor, and the crankcase is connected to an intake unit. The piston cylinder includes a cylinder body installed above the crankcase and connected to the crankcase, as well as a noise reduction cylinder head installed at the upper end of the cylinder body. The interior of the cylinder body is constructed as a piston chamber and an exhaust chamber that are interconnected through an exhaust hole. The soundproof cover is located outside the piston cylinder. The air compressor cylinder has good noise reduction effect, easy installation, and compact structure.
The present application is a non-provisional application of U.S. Provisional Application No. 63/743,897, filed on Jan. 10, 2025, the disclosure of which is incorporated herein by reference.
TECHNICAL FIELDThe present disclosure relates to the technical field of air compression devices, specifically to an air compressor cylinder.
BACKGROUNDA cylinder is an important component of an air compressor, and multiple sets of valve plates are usually installed inside the cylinder. By opening and closing the valve plates, the cylinder can pull in external air and discharge compressed air. Due to the continuous opening and closing of the valve plates during operation, the valve plates collide with the piston connecting rod, producing significant noise and affecting the performance of the air compressor.
Some existing technologies use a soundproof cover on an outside of the cylinder. When a soundproof cover is installed as a whole, it will result in a larger device volume. When only a soundproof cover is installed on the outside of the piston cylinder, due to the structure of the cylinder, the exhaust pipeline usually needs to pass through the soundproof cover, which is not conducive to installation. At the same time, the external air duct is not conducive to the demand for intensive use of car air compressors. A need accordingly exists for an air compressor that provides improved noise reduction within a compact structure.
SUMMARYThe present disclosure provides an air compressor cylinder with good noise reduction, convenient installation, and a compact structure to solve the above-discussed issues with known air compressors. In some aspects, the techniques described herein relate to an air compressor cylinder including a crankcase equipped with a crank connecting rod assembly connected to an output shaft of a motor. The crankcase is connected to an intake unit. The air compressor cylinder also includes a piston cylinder comprising a cylinder body installed above and connected to the crankcase, and a noise reduction cylinder head installed at an upper end of the cylinder body. An interior of the cylinder body is constructed as a piston chamber and an exhaust chamber that are connected through an exhaust vent. The exhaust chamber is connected to an exhaust unit, and a one-way exhaust valve group is installed at the exhaust vent to control one-way exhaust of the piston chamber to the exhaust chamber. The air compressor cylinder further includes a piston installed at an end of the crank connecting rod assembly. The piston is configured to move back and forth along the piston chamber to compress air. The piston is provided with an air inlet and a single intake valve group. The example single intake valve group is used to control one-way intake of air from the air inlet into the piston chamber. The air compressor cylinder moreover includes a soundproof cover installed outside of the piston cylinder.
In some aspects, which may be combined with any other aspect described herein, an inner wall of the soundproof cover includes soundproof cotton.
In some aspects, which may be combined with any other aspect described herein, the piston includes a piston ring and a piston part connected to the end of the crank connecting rod assembly, a cover provided above the piston ring and capable of tightly pressing the piston ring on a surface of the piston part, and wherein the air inlet penetrates the cover and the piston part vertically, and a buffer pad is provided on the surface of the cover, with a middle vent hole of the buffer pad facing the air inlet.
In some aspects, which may be combined with any other aspect described herein, the single intake valve group includes a valve plate installed on a surface of the piston part, and an opening and closing part of the valve plate is aligned with the buffer pad.
In some aspects, which may be combined with any other aspect described herein, the valve plate installed on the surface of the piston part is a mosquito valve plate.
In some aspects, which may be combined with any other aspect described herein, the piston chamber and the exhaust chamber are separated by a splitter plate arranged inside the cylinder body, and the one-way exhaust valve group includes a valve plate installed on a surface of the splitter plate, an opening and closing part of the valve plate facing the exhaust vent on the splitter plate, and a splitter plate buffer pad is provided on the surface of the splitter plate, and the opening and closing part of the valve plate faces the splitter plate buffer pad.
In some aspects, which may be combined with any other aspect described herein, the valve plate installed on the surface of the splitter plate is a mosquito coil valve plate.
In some aspects, which may be combined with any other aspect described herein, a top surface of the crankcase is constructed with a first installation surface, a lower end of the cylinder body is provided with an installation board, wherein a second installation surface on a lower surface of the installation board is opposite to and installed on the first installation surface, and the soundproof cover is installed on the installation board.
In some aspects, which may be combined with any other aspect described herein, the exhaust unit includes a first air passage opened in a wall of the cylinder body, wherein an air intake at a first end of the first air passage is connected to the exhaust chamber, and wherein an air outlet at a second end of the first air passage is constructed outside the soundproof cover.
In some aspects, which may be combined with any other aspect described herein, the air outlet is arranged on the second installation surface, and the exhaust unit further includes a second air passage, wherein an air intake at a first end of the second air passage is arranged on the first installation surface of the crankcase, and the air outlet of the first air passage and the air intake of the second air passage are sealed and connected, and an air outlet of at a second end of the second air passage is arranged on the first installation surface outside the soundproof cover.
In some aspects, which may be combined with any other aspect described herein, wherein a limited position groove is provided on the surface of the cover, and the buffer pad is positioned and installed in the limited position groove.
In some aspects, which may be combined with any other aspect described herein, an opening and closing part of the valve plate is smaller than a cross-sectional area of the buffer pad.
In some aspects, which may be combined with any other aspect described herein, an outer wall of the soundproof cover is provided with a heat dissipation channel.
The present disclosure has the following advantages:
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- (1) On the one hand, by constructing a piston chamber and an exhaust chamber inside the cylinder body, not only can the working efficiency of the cylinder be improved and its stable operation be ensured, but also the noise reduction cylinder head set at its top can buffer the airflow and reduce noise. On the other hand, the present disclosure provides buffer gaskets below at least one valve plate of the single inlet valve group in the piston chamber and at least one valve plate of the exhaust chamber, thereby reducing the mechanical noise caused by the knocking of the compressor valve plate. In addition, using a soundproof cover to cover the outside of the piston cylinder reduces the overall noise generated during the compression of air in the cylinder.
- (2) The present disclosure utilizes the inner structure of the cylinder body and crankcase wall to construct an air passage, and the air outlet is wound to the outside of the soundproof cover. On the one hand, it can ensure the integrity of the soundproof cover, and there is no need to open a clearance groove on the soundproof cover on the exhaust end side of the piston cylinder, which improves the noise reduction effect and facilitates the installation of the soundproof cover. On the other hand, while connecting the end faces of the mechanism, a sealed connection between the air ducts of the exhaust unit can be achieved, so that the position of the exhaust outlet of the exhaust unit can be flexibly adjusted according to the specific layout requirements of the device, without the need to connect an external exhaust pipe, thereby simplifying the air path, which is conducive to the integration of vehicle air compressors.
Additional features and advantages of the disclosed are described in, and are apparent from, the following Detailed Description and the Figures.
The accompanying drawings, which are incorporated in and constitute a part of this specification, show certain aspects of the subject matter disclosed herein and, together with the description, help explain some of the principles associated with the disclosed implementations.
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- 1—crankcase;
- 2—piston cylinder;
- 3—piston;
- 4—soundproof cover;
- 5—motor;
- 501—shell;
- 502—rotor component;
- 6—first air passage;
- 601—first air intake;
- 602—first air outlet;
- 7—second air passage;
- 701—second air intake;
- 702—second air outlet;
- 8—sealing ring;
- 9—sealing ring;
- 101—first installation surface;
- 102—positioning slot;
- 103—crank connecting rod assembly;
- 201—cylinder body;
- 202—noise reduction cylinder head;
- 203—splitter plate;
- 204—exhaust vent;
- 205—piston chamber;
- 206—exhaust chamber;
- 207—installation board;
- 208—second installation surface;
- 301—air inlet;
- 302—piston ring;
- 303—cover;
- 304—buffer pad;
- 305—valve plate;
- 306—piston part;
- 307—valve plate.
In order to make the technical means, creative features, objectives and effects of the present disclosure easy to understand, the present disclosure is explained in conjunction with specific implementation methods.
As shown in
In the embodiments of the present disclosure, the piston cylinder 2 includes a cylinder body 201 installed above and connected to the crankcase 1 through a sealing ring 9, and a noise reduction cylinder head 202 installed on the upper end of the cylinder body 201. The outer wall of cylinder body 201 is equipped with one or more heat dissipation fins. In some embodiments, the noise reduction cylinder head 202 is in the shape of a dome protruding outward to enhance the noise reduction effect. The noise reduction cylinder head 202 can also be constructed as other structures that buffer airflow.
In the embodiments of the present disclosure, such as shown in
In the embodiments of the present disclosure, a piston 3 is installed at the end of the crank connecting rod assembly 103. The piston 3 moves back and forth along the piston chamber 205 to compress air. The piston 3 is provided with an air inlet 301 and a single intake valve group, which is used to control the one-way intake of air from the air inlet 301 into the piston chamber 205.
In the embodiments of the present disclosure, the soundproof cover 4 is located outside of the piston cylinder 2. In the embodiment of the present disclosure, the inner wall of the soundproof cover 4 is provided with soundproof cotton (not shown in the figure), thereby reducing the noise generated during the compression of gas in piston cylinder 2.
In order to improve the heat dissipation efficiency of the air compressor cylinder, the outer wall of the soundproof cover 4 is provided with a heat dissipation channel (not shown in the figure). For example, the heat dissipation channel can be the heat dissipation fin constructed on the surface of the soundproof cover 4.
In the embodiment of the present disclosure, in order to reduce the noise generated during the compression of air in the cylinder, the piston 3 comprises a piston ring 302 and a piston part 306 connected to the end of the crank connecting rod assembly 103. A cover 303 is provided above the piston ring 302 to tightly press the piston ring 302 against the surface of the piston part 306. The air inlet 301 penetrates the cover 303 and the piston part 306 vertically, and a buffer pad 304 is provided on the surface of the cover 303.
The middle vent hole of the buffer pad 304 is aligned with the air inlet 301, and the single intake valve group includes a valve plate 305 installed on the surface of the piston part 306. The opening and closing part of the valve plate 305 is aligned with the buffer pad 304.
In the embodiments of the present disclosure, the surface of the cover 303 is provided with a limited position groove, and the buffer pad 304 is positioned and installed in the limited position groove. The opening and closing part of the valve plate 305 is smaller than the cross-sectional area of the buffer pad 304. When the opening and closing part of valve plate 305 hits the air inlet 301, it falls on the surface of buffer pad 304, which can effectively reduce the noise generated during the operation of the opening and closing part of valve plate 305.
In the preferred embodiment, the buffer pad 304 can be installed in the limit slot by wrapping it with adhesive. In order to improve the stability of the buffer pad 304 during use, the limit groove can also be inserted through the cover 303 (not shown in the figure). The buffer pad 304 can be designed with a stepped edge, and the limit groove can be designed with a stepped shape that matches its edge. The pressure cover 303 can press the buffer pad 304 onto the piston part 306.
In the embodiments of the present disclosure, in order to further improve the noise reduction effect, the one-way exhaust valve group can also adopt the approximate noise reduction method described above.
The piston chamber 205 and the exhaust chamber 206 are separated by a splitter plate 203 inside the cylinder body 201. The one-way exhaust valve group is a second valve plate 307 installed on the surface of the splitter plate 203, and the opening and closing part of the second valve plate 307 faces the exhaust vent 204 on the splitter plate 203. The surface of the splitter plate 203 is provided with a buffer pad (not shown in the figure), and the opening and closing part of the second valve plate 307 faces the buffer pad.
In the embodiment of the present disclosure, both valve plates 305, 307 are mosquito coil valve plates. Mosquito coil valve plates have higher toughness, fatigue resistance, wear resistance, corrosion resistance, high temperature resistance, and dimensional stability compared to ordinary valve plates.
In order to facilitate the installation of the cylinder body 201 and the soundproof cover 4, in the embodiments of the present disclosure, the top surface of the crankcase 1 is constructed with a first installation surface 101. The lower end of the cylinder body 201 is provided with an installation board 207. A second installation surface 208 on a lower surface of the installation board 207 is opposite to and installed on the first installation surface 101. The soundproof cover 4 is installed on the installation board 207, and can also be installed on the first installation surface 101 on the top surface of the crankcase 1.
Furthermore, in the embodiment of the present disclosure, the exhaust unit comprises an air passage 6 opened in the wall of the cylinder body 201. An air intake 601 at one end of the air passage 6 is connected to the exhaust chamber 206, and an air outlet 602 at the other end of the air passage 6 is constructed outside the soundproof cover 4. By using the wall of cylinder body 201 to construct a gas pipe and winding the outlet to the outside of soundproof cover 4, the integrity of soundproof cover 4 can be ensured, and there is no need to open a clearance groove on the soundproof cover 4 on the exhaust end side of piston cylinder 2, which improves the noise reduction effect and the installation efficiency of soundproof cover 4. Further, there is no need to connect an external exhaust pipe, simplifying the air path and meeting the demand for integrated vehicle air compressors.
Furthermore, in the embodiments of the present disclosure, the air outlet 602 is arranged on the second installation surface 208, and the exhaust unit further comprises an second air passage 7. The air intake 701 at one end of the second air passage 7 is arranged on the first installation surface 101 of the crankcase 1, and the air outlet 602 of the first air passage 6 and the air intake 701 of the second air passage 7 are sealed and connected. The air outlet 702 at the other end of the second air passage 7 is arranged on the first installation surface 101 outside the soundproof cover 4.
In order to improve the sealing effect between the air outlet 602 of the first air passage 6 and the air intake 701 of the second air passage 7, a positioning slot 102 is opened on the first installation surface 101. The air intake 701 of the second air passage 7 is located in the center of the positioning slot 102. A sealing ring 8 is set in the positioning slot 102.
By using a method similar to the above, it is possible to achieve a sealed connection between the exhaust unit air ducts while connecting the end faces of the mechanism, so that the position of the exhaust unit's air outlet can be flexibly adjusted according to the specific layout requirements of the device.
When installing the cylinder of the present disclosure, the crank connecting rod assembly 103 is first installed in the crankcase 1, and then the rotor component 502 of the motor 5 is installed on one side of the crankcase 1 through a bearing, and the drive shaft of the motor 5 is connected to the crank connecting rod assembly 103. Next, a user may install the shell 501 of motor 5 on one side of crankcase 1, so that the rotor component 502 is fitted into the shell 501 of motor 5.
When installing piston cylinder 2, the piston 3 connected above the crank connecting rod assembly 103 passes through the piston chamber 205, and the cylinder body 201 and crankcase 1 are installed through the installation board 207, achieving the connection between the first air passage 6 and the second air passage 7.
Finally, the soundproof cover 4 is installed around the piston cylinder 2 so that the soundproof cover 4 covers the piston cylinder 2 to reduce noise. According to specific usage requirements, corresponding distribution valves or gas components (not shown in the figure) can be connected at the air outlet 702 position.
When the cylinder of the present disclosure is in operation, the crank connecting rod assembly 103 is driven by the motor 5 to work, causing the connected piston 3 to reciprocate along the piston chamber 205 to compress gas. During this process, the air from the intake unit enters the crankcase 1. As the volume of the piston chamber 205 increases, the gas in the crankcase 1 enters the piston chamber 205 through the air inlet 301 and the opened valve plate 305. At this time, the one-way exhaust valve group is in a closed state. When the volume of piston chamber 205 decreases, valve plate 305 closes and the one-way exhaust valve group opens. Gas enters exhaust chamber 206 from piston chamber 205 through exhaust vent 204 and flows out from the first air passage 6 and the second air passage 7.
On the one hand, by constructing a piston chamber 205 and an exhaust chamber 206 inside the cylinder body 201, not only can the working efficiency of the cylinder be improved and its stable operation be ensured, but also the noise reduction cylinder head 202 set at its top can buffer the airflow and reduce noise. On the other hand, the present disclosure provides a buffer pad below valve plate 305 of the single inlet valve group in piston chamber 205 and valve plate 307 of exhaust chamber 206, reducing the mechanical noise caused by the knocking of compressor valve plates. In addition, the use of soundproof cover 4 to cover the outside of piston cylinder 2 reduces the overall noise generated during the compressed air process of the cylinder.
The present disclosure utilizes the cylinder body 201 and the inner wall of the crankcase 1 to construct an air passage, and the outlet is wound to the outside of the soundproof cover 4. This can ensure the integrity of the soundproof cover 4, without the need to open a clearance groove on the soundproof cover 4 on the exhaust end side of the piston cylinder 2, which improves the noise reduction effect and facilitates the installation of the soundproof cover 4. Furthermore, while connecting the end faces of the mechanism, a sealed connection between the air ducts of the exhaust unit can be achieved, so that the position of the exhaust outlet of the exhaust unit can be flexibly adjusted according to the specific layout requirements of the device, without the need to connect an external exhaust pipe. This simplifies the air path, which is conducive to the integration of vehicle air compressors.
ConclusionIt should be understood that various changes and modifications to the example embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present subject matter and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.
In the descriptions above and in the claims, phrases such as “at least one of” or “one or more of” may occur followed by a conjunctive list of elements or features. The term “and/or” may also occur in a list of two or more elements or features. Unless otherwise implicitly or explicitly contradicted by the context in which it used, such a phrase is intended to mean any of the listed elements or features individually or any of the recited elements or features in combination with any of the other recited elements or features. For example, the phrases “at least one of A and B;” “one or more of A and B;” and “A and/or B” are each intended to mean “A alone, B alone, or A and B together.” A similar interpretation is also intended for lists including three or more items. For example, the phrases “at least one of A, B, and C;” “one or more of A, B, and C;” and “A, B, and/or C” are each intended to mean “A alone, B alone, C alone, A and B together, A and C together, B and C together, or A and B and C together.” Use of these terms also does not exclude the possibility of other unrecited features or elements and is merely meant to be illustrative, unless otherwise implicitly or explicitly contradicted by the context in which it used.
The subject matter described herein can be embodied in systems, apparatus, methods, and/or articles depending on the desired configuration. The implementations set forth in the foregoing description do not represent all implementations consistent with the subject matter described herein. Instead, they are merely some examples consistent with aspects related to the described subject matter. Although a few variations have been described in detail above, other modifications or additions are possible. In particular, further features and/or variations can be provided in addition to those set forth herein. For example, the implementations described above can be directed to various combinations and subcombinations of the disclosed features and/or combinations and subcombinations of several further features disclosed above.
Claims
1. An air compressor cylinder comprising:
- a crankcase equipped with a crank connecting rod assembly connected to an output shaft of a motor, wherein the crankcase is connected to an intake unit;
- a piston cylinder comprising: a cylinder body installed above and connected to the crankcase, and a noise reduction cylinder head installed at an upper end of the cylinder body, wherein an interior of the cylinder body is constructed as a piston chamber and an exhaust chamber that are connected through an exhaust vent, and wherein the exhaust chamber is connected to an exhaust unit, and a one-way exhaust valve group is installed at the exhaust vent to control one-way exhaust of the piston chamber to the exhaust chamber;
- a piston installed at an end of the crank connecting rod assembly, wherein the piston is configured to move back and forth along the piston chamber to compress air, and wherein the piston is provided with an air inlet and a single intake valve group, the single intake valve group used to control one-way intake of air from the air inlet into the piston chamber; and
- a soundproof cover installed outside of the piston cylinder.
2. The air compressor cylinder of claim 1, wherein an inner wall of the soundproof cover comprises soundproof cotton.
3. The air compressor cylinder of claim 1, wherein the piston comprises a piston ring and a piston part connected to the end of the crank connecting rod assembly, a cover provided above the piston ring and capable of tightly pressing the piston ring on a surface of the piston part, and wherein the air inlet penetrates the cover and the piston part vertically, and a buffer pad is provided on the surface of the cover, with a middle vent hole of the buffer pad facing the air inlet.
4. The air compressor cylinder of claim 3, wherein the single intake valve group includes a valve plate installed on a surface of the piston part, and an opening and closing part of the valve plate is aligned with the buffer pad.
5. The air compressor cylinder of claim 4, wherein the valve plate installed on the surface of the piston part is a mosquito valve plate.
6. The air compressor cylinder of claim 3, wherein the piston chamber and the exhaust chamber are separated by a splitter plate arranged inside the cylinder body, and the one-way exhaust valve group comprises a valve plate installed on a surface of the splitter plate, an opening and closing part of the valve plate facing the exhaust vent on the splitter plate, and a splitter plate buffer pad is provided on the surface of the splitter plate, and the opening and closing part of the valve plate faces the splitter plate buffer pad.
7. The air compressor cylinder of claim 6, wherein the valve plate installed on the surface of the splitter plate is a mosquito coil valve plate.
8. The air compressor cylinder of claim 1, wherein a top surface of the crankcase is constructed with a first installation surface, a lower end of the cylinder body is provided with an installation board, wherein a second installation surface on a lower surface of the installation board is opposite to and installed on the first installation surface, and the soundproof cover is installed on the installation board.
9. The air compressor cylinder of claim 8, wherein the exhaust unit comprises a first air passage opened in a wall of the cylinder body, wherein an air intake at a first end of the first air passage is connected to the exhaust chamber, and wherein an air outlet at a second end of the first air passage is constructed outside the soundproof cover.
10. The air compressor cylinder of claim 9, wherein the air outlet is arranged on the second installation surface, and the exhaust unit further comprises a second air passage, wherein an air intake at a first end of the second air passage is arranged on the first installation surface of the crankcase, and the air outlet of the first air passage and the air intake of the second air passage are sealed and connected, and an air outlet of at a second end of the second air passage is arranged on the first installation surface outside the soundproof cover.
11. The air compressor cylinder of claim 4, wherein a limited position groove is provided on the surface of the cover, and the buffer pad is positioned and installed in the limited position groove.
12. The air compressor cylinder of claim 11, wherein an opening and closing part of the valve plate is smaller than a cross-sectional area of the buffer pad.
13. The air compressor cylinder of claim 1, wherein an outer wall of the soundproof cover is provided with a heat dissipation channel.
Type: Application
Filed: Jan 12, 2026
Publication Date: Jul 16, 2026
Inventors: Jianjun Tan (Kowloon KLN), Daisy Lina Kwok (Kowloon KLN)
Application Number: 19/446,229
