Gas distribution device and pneumatic comfort system

Abstract

The utility model relates to the technical field of pneumatic comfort systems, in particular to a gas distribution device which comprises a shell. The circuit board is arranged in the shell; the first electromagnetic valve group is provided with at least two electromagnetic valves, and the at least two electromagnetic valves of the first electromagnetic valve group are installed on the circuit board and electrically connected with the circuit board; the second electromagnetic valve group is provided with at least two electromagnetic valves, and the at least two electromagnetic valves of the second electromagnetic valve group are installed on the circuit board and electrically connected with the circuit board; the air inlet pipe is provided with an air inlet nozzle and an air inlet flow channel communicated with the air inlet nozzle, and the air inlet flow channel is communicated with the at least two electromagnetic valves of the first electromagnetic valve set and the at least two electromagnetic valves of the second electromagnetic valve set. And air entering the air inlet flow channel from the air inlet nozzle can be supplied to the at least two electromagnetic valves of the first electromagnetic valve group and the at least two electromagnetic valves of the second electromagnetic valve group respectively. The gas distribution device disclosed by the utility model is wide in gas supply adaptability, high in assembly precision and assembly efficiency and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic comfort systems, in particular to a gas distribution device and a pneumatic comfort system. Background Art

[0002] In a pneumatic comfort system, such as a pneumatic massage system, a pneumatic lumbar support system, etc., a gas supply device is connected to an airbag through a valve module, and the valve module controls the inflation and deflation of the airbag. Among them, the valve module includes a plurality of electromagnetic valves and a circuit board arranged in a housing, and the plurality of electromagnetic valves are assembled on the circuit board, and each electromagnetic valve is respectively connected to an airbag and controls the inflation and deflation of the corresponding airbag.

[0003] In the existing valve module, an air inlet channel is usually integrally formed on the housing, and a plurality of insertion interfaces corresponding to the plurality of electromagnetic valves are opened on the air inlet channel. After the plurality of electromagnetic valves are assembled on the circuit board, they are respectively inserted into the plurality of insertion interfaces one by one. During operation, the air inlet channel receives the intake air flow of the gas supply device and distributes it to each electromagnetic valve through the plurality of insertion interfaces respectively. This valve module structure not only increases the forming difficulty of the housing, but also requires high precision in the assembly position of the plurality of electromagnetic valves after being assembled and fixed on the circuit board to be accurately inserted into the plurality of insertion interfaces of the air inlet channel on the housing respectively, which increases the assembly process difficulty. Summary of the Utility Model

[0004] To solve the above technical problems, a technical solution adopted by the utility model is: to provide a gas distribution device, including a housing; a circuit board arranged in the housing; a first electromagnetic valve group having at least two electromagnetic valves, at least two electromagnetic valves of the first electromagnetic valve group being installed on the circuit board and electrically connected to the circuit board; a second electromagnetic valve group having at least two electromagnetic valves, at least two electromagnetic valves of the second electromagnetic valve group being installed on the circuit board and electrically connected to the circuit board; an intake pipe having an intake nozzle and an intake air flow channel communicating with the intake nozzle, and the intake air flow channel communicating with at least two electromagnetic valves of the first electromagnetic valve group and at least two electromagnetic valves of the second electromagnetic valve group respectively, and the gas entering from the intake nozzle into the intake air flow channel can be supplied to at least two electromagnetic valves of the first electromagnetic valve group and at least two electromagnetic valves of the second electromagnetic valve group respectively.

[0005] Optionally, the electromagnetic valve includes an intake seat and an electromagnetic valve body. An intake channel is arranged in the intake seat. One end of the intake channel is a first air connection port, and the other end is a first series connection port capable of being inserted by the first air connection port of another intake seat. The intake seats of two adjacent electromagnetic valves in the same group are connected in series with each other so that the intake channels of the two adjacent electromagnetic valves communicate; an air flow channel communicating with the intake channel of the intake seat is arranged in the electromagnetic valve body.

[0006] Optionally, a first limiting block is provided at one end of the air inlet seat corresponding to the first air connection port, and a first limiting groove is provided at one end of the air inlet seat corresponding to the first series connection port. After the air inlet seats of two adjacent solenoid valves are connected in series with each other and rotated relative to each other, the first limiting block is snapped into the first limiting groove to limit the separation of the two adjacent solenoid valves in the series connection direction.

[0007] Optionally, the air inlet flow channel is provided with a second air connection port that can be inserted into the first series connection port of the air inlet seat, and the air inlet flow channel is connected in series with at least two solenoid valves of the first solenoid valve group.

[0008] Optionally, a second limiting block is provided at one end of the air inlet pipe corresponding to the second air connection port, and a first limiting groove is provided at one end of the air inlet seat corresponding to the first series connection port. After the air inlet pipe is connected in series with the air inlet seat of the serially connected solenoid valve and rotated relative to each other, the second limiting block is snapped into the first limiting groove to limit the separation of the air inlet pipe and the serially connected solenoid valve in the series connection direction.

[0009] Optionally, the air inlet channel is provided with a second series connection port that can be inserted into the first air connection port of the air inlet seat, and the air inlet flow channel is connected in series with at least two solenoid valves of the second solenoid valve group.

[0010] Optionally, a second limiting groove is provided at one end of the air inlet pipe corresponding to the second series connection port, and a first limiting block is provided at one end of the air inlet seat corresponding to the first air connection port. After the air inlet pipe is connected in series with the air inlet seat of the adjacent solenoid valve and rotated relative to each other, the first limiting block is snapped into the second limiting groove to limit the separation of the air inlet pipe and the adjacent solenoid valve in the series connection direction.

[0011] Optionally, the gas distribution device is provided with a sealing ring for preventing air leakage at the insertion of the first air connection port and the first series connection port.

[0012] Optionally, the gas distribution device is provided with a pressure regulating valve, and the pressure regulating valve is installed on the circuit board and electrically connected to the circuit board; the pressure regulating valve is in air communication with at least two solenoid valves of the first solenoid valve group.

[0013] To solve the above technical problems, a technical solution adopted by the present utility model is: to provide a pneumatic comfort system, including a gas source device, the above-mentioned gas distribution device, and an airbag, and the gas source device is in air connection with the airbag through the gas distribution device.

[0014] The beneficial effects of the embodiments of the present utility model are:

[0015] The gas distribution device of the present utility model has the intake pipe separately arranged relative to the housing, which reduces the forming difficulty of the housing and also reduces the assembly precision requirements for the solenoid valve and the overall assembly process difficulty of the device. Moreover, the intake pipe is in gas communication with two groups of solenoid valve groups respectively, and can supply air flow to the solenoid valves of the two groups of solenoid valve groups to meet the air supply requirements of solenoid valves with different functions.

[0016] Among them, multiple solenoid valves in each solenoid valve group are connected in series, and each solenoid valve group is connected in series with the intake pipe. While ensuring airtightness, it further reduces the assembly precision requirements for the solenoid valve and the overall assembly process difficulty of the device, and reduces production costs.

[0017] The pneumatic comfort system of the present utility model uses the above gas distribution device to control the inflation and deflation of the airbag. Multiple solenoid valve groups can respectively meet the inflation and deflation control requirements of the multi-functional pneumatic comfort system, and are beneficial to reducing the component costs of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments of the present utility model. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the drawings.

[0019] Figure 1 is a three-dimensional structural schematic diagram of the gas distribution device of the embodiment of the present utility model;

[0020] Figure 2 is an internal structural schematic diagram of the gas distribution device of the embodiment of the present utility model;

[0021] Figure 3 is an exploded view of the internal structure of the gas distribution device of the embodiment of the present utility model;

[0022] Figure 4 is a sectional structural schematic diagram of a two-position three-way solenoid valve in the gas distribution device of the embodiment of the present utility model;

[0023] Figure 5 is a sectional structural schematic diagram of a three-position three-way solenoid valve in the gas distribution device of the embodiment of the present utility model;

[0024] Figure 6 is a sectional structural schematic diagram of a pressure relief valve in the gas distribution device of the embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] For the convenience of understanding the present utility model, the present utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0026] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in this specification in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0027] Please refer to Figure 1 - Figure 2 , the gas distribution device 100 of the embodiment of the present utility model includes a housing 10, a circuit board 20, a first solenoid valve group 30, a second solenoid valve group 40 and an air inlet pipe 50. The circuit board 20, the first solenoid valve group 30 and the second solenoid valve group 40 are arranged in the housing 10. The first solenoid valve group 30 and the second solenoid valve group 40 are assembled on the circuit board 20 and electrically connected to the circuit board 20. The air inlet pipe 50 is respectively communicated with the first solenoid valve group 30 and the second solenoid valve group 40.

[0028] When using the gas distribution device 100, by inputting gas into the air inlet pipe 50, the gas entering the air inlet pipe 50 supplies gas to the first solenoid valve group 30 and the second solenoid valve group 40 respectively, so as to realize the distribution of gas, and further supply gas to the device to be inflated, such as supplying gas to an air bag. The circuit board 20 controls the operation of the solenoid valves of the first solenoid valve group 30 and the second solenoid valve group 40.

[0029] Regarding the above-mentioned first solenoid valve group 30, please refer to Figure 2 , the first solenoid valve group 30 has at least two solenoid valves 31 arranged in sequence. At least two solenoid valves 31 of the first solenoid valve group 30 are installed on the circuit board 20 and electrically connected to the circuit board 20. At least two solenoid valves 31 of the first solenoid valve group 30 are communicated with the air inlet pipe 50. When gas is input into the air inlet pipe 50, the air inlet pipe 50 supplies gas to at least two solenoid valves 31 of the first solenoid valve group 30. The circuit board 20 can control the connection or blockage between each solenoid valve 31 and the corresponding device to be inflated. When the circuit board 20 controls the connection between the solenoid valve 31 and the device to be inflated, the gas input into the air inlet pipe 50 is conveyed to the device to be inflated through the solenoid valve 31, so as to realize the on-demand gas supply to the device to be inflated.

[0030] Regarding the above-mentioned solenoid valve 31, please refer to Figure 2 - Figure 3 , the solenoid valve 31 includes an intake seat 311 and a solenoid valve body 312. The intake seat 311 is connected to the solenoid valve body 312 and enables gas flow. The intake seat 311 is ventilated and connected to the intake pipe 311. The solenoid valve body 312 is installed on the circuit board 20, and the circuit board 20 is electrically connected to the solenoid valve body 312. The solenoid valve body 312 is ventilated and connected to the device to be inflated and controls the inflation and deflation of the corresponding device to be inflated. The intake seats 311 of two adjacent solenoid valves 31 in the first solenoid valve group 30 are connected in series with each other, that is, the intake ends of multiple solenoid valves 31 are connected in series with each other. When gas is input into the intake pipe 50, the gas in the intake pipe 50 sequentially enters each intake seat 311 along the series connection. When the corresponding intake seat 311 supplies gas to the solenoid valve body 312 of each solenoid valve 31, when the solenoid valve 31 is connected to the device to be inflated, the gas in the intake seat 311 is transported to the device to be inflated through the solenoid valve body 312.

[0031] Regarding the above-mentioned intake seat 311, please refer to Figure 3 , an intake channel 311a is provided in the intake seat 311, and an air flow channel connected to the intake channel 311a of the intake seat 311 is provided in the solenoid valve body 312. The air flow channel is connected to the device to be inflated. When the intake seat 311 supplies gas to the solenoid valve body 312, the intake channel 311a of the intake seat 311 transports gas to the air flow channel of the solenoid valve body 312 to supply gas to the device to be inflated. One end of the intake channel 311a is a first gas connection port 311b, and the other end is a first series connection port 311c that can be plugged by the first gas connection port 311b of another intake seat 311. Between two adjacent solenoid valves 31 in the first solenoid valve group 30, the first gas connection port 311b of the intake seat 311 of one solenoid valve 31 is plugged into the first series connection port 311c of the intake seat 311 of another solenoid valve 31, so that two adjacent solenoid valves 31 are connected in series with each other. The intake channel 311a of the intake seat 311 is ventilated and connected to the solenoid valve body 312 and supplies gas to the solenoid valve body 312. The solenoid valve body 312 is also provided with an inflation port, and the inflation port is used for ventilation and connection to the device to be inflated.

[0032] The connection in series between the above two adjacent solenoid valves 31 is sealed with a sealing ring 70 to prevent air leakage between the two adjacent solenoid valves 31. Specifically, the sealing ring 70 is sleeved on the first series connection port 311c or the first gas connection port 311b. If it is sleeved on the first series connection port 311c, the inner ring of the sealing ring 70 is sealed and abutted against the outer side wall of the first series connection port 311c of one intake seat 311, and the outer ring of the sealing ring 70 is sealed and abutted against the inner side wall of the first gas connection port 311b of the intake channel 311a of another intake seat 311, so as to seal the connection in series between the two adjacent solenoid valves 31.

[0033] Please refer to Figure 3 - Figure 5 , optionally but not limited to, the solenoid valve 31 can be a two-way three-way solenoid valve or a three-way three-way solenoid valve.

[0034] Among them, for the solenoid valve 31 selected as a two-way three-way solenoid valve, please refer to Figure 4 , and its solenoid valve body 312 has the following structure: The solenoid valve body 312 includes a first valve main body 3121, a first valve core 3122 and a first coil 3123. The first valve main body 3121 is connected to the intake seat 311, the first coil 3123 is wound around the first valve main body 3121, the first valve core 3122 is slidably arranged in the first valve main body 3121, and the first valve main body 3121 has a first conduction chamber 3121a and an intake port 3121b, an inflation port 3121c and a deflation port 3121d communicating with the first conduction chamber 3121a. Among them, the intake port 3121b communicates with the intake passage 311a of the intake seat 311, the inflation port 3121c is used to communicate with the device to be inflated, the deflation port 3121d is used to communicate with the atmosphere, and the intake port 3121b, the first conduction chamber 3121a, the inflation port 3121c and the deflation port 3121d communicate to form the air flow passage of the valve main body 312 of the two-way three-way solenoid valve; moreover, the first valve core 3122 can be displaced in the first conduction chamber 3121a under the excitation of the first coil 3123 to block the intake port 3121b or block the deflation port 3121d.

[0035] When the solenoid valve 31 selected as a two-way three-way solenoid valve is in use, it has the following states: The first valve core 3122 blocks the deflation port 3121d under normal conditions and displaces to block the intake port 3121b under the excitation of the first coil 3123; when the first valve core 3123 blocks the deflation port 3121d under normal conditions, the intake port 3121b is opened and communicates with the inflation port 3121c, and the gas flowing in from the intake passage 311a of the intake seat 311 can flow from the intake port 3121b to the inflation port 3121c to supply gas to the device to be inflated; when the first valve core 3122 blocks the intake port 3121b under the excitation of the first coil 3123, the deflation port 3121d is opened and communicates with the inflation port 3121c, stopping the supply of gas to the device to be inflated, and the gas of the device to be inflated can flow from the inflation port 3121c to the deflation port 3121d and be discharged to the atmosphere.

[0036] For the solenoid valve 31 selected as a three-way three-way solenoid valve, please refer to Figure 5, its solenoid valve body 312 has the following structure: The solenoid valve body 312 includes a first valve main body 3121, a first valve core 3122, a first coil 3123, a second valve main body 3124, a second valve core 3125, and a second coil 3126. Among them, the first valve main body 3121 is provided with a first conduction chamber 3121a, an air inlet 3121b, an inflation port 3121c, and a first communication port 3121e that communicate with the first conduction chamber 3121a. The first valve core 3122 is arranged in the first conduction chamber 3121a, and the first coil 3123 is wound around the first valve main body 3121. The first valve core 3122 can block the air inlet 3121b or the first communication port 3121e under the excitation of the first coil 3123. The second valve main body 3124 is provided with a second conduction chamber 3124a, a second communication port 3124b, and a deflation port 3121d that communicate with the second conduction chamber 3124a. The second valve core 3125 is arranged in the second conduction chamber 3124a, and the second coil 3126 is wound around the second valve main body 3124. The second valve core 3125 can block or open the second communication port 3124b under the excitation of the second coil 3126. And the first communication port 3121e communicates with the second communication port 3124b. The air inlet 3121b of the first valve main body 3121 communicates with the air inlet passage 311a of the air inlet seat 311. The inflation port of the first valve main body 3121 is used to communicate with the device to be inflated. The deflation port 3121d of the second valve main body 3124 is used to communicate with the atmosphere. Among them, the air inlet 3121b, the first conduction chamber 3121a, the inflation port 3121c, the first communication port 3121a, the second communication port 3124b, the second conduction chamber 3124a, and the deflation port 3121d communicate to form the air flow passage of the solenoid valve body 312 of this three-way three-position solenoid valve.

[0037] When the first valve core 3122 blocks the first communication port 3121e, the air inlet 3121b opens and communicates with the inflation port. The gas flowing in from the air inlet passage 311a of the air inlet seat 311 can flow from the air inlet 3121b to the inflation port 3121c to supply gas to the device to be inflated. When the first valve core 3122 blocks the air inlet 3121b and the second valve core 3125 opens the second communication port 3124b, the inflation port 3121c communicates with the deflation port 3121d, and the gas supply to the device to be inflated stops. The gas of the device to be inflated can flow from the inflation port 3121c to the deflation port 3121d and be discharged to the atmosphere. When the first valve core 3122 blocks the air inlet 3121b and the second valve core 3125 blocks the second communication port 3124b, the device to be inflated maintains a preset pressure to achieve pressure holding of the device to be inflated.

[0038] Optionally, the solenoid valve 31 selected as a two-position three-way solenoid valve has a first valve core 3122 that is at least one of an iron core and a permanent magnet core. The solenoid valve 31 selected as a three-position three-way solenoid valve has a first valve core 3122 that is at least one of an iron core and a permanent magnet core, and a second valve core 3125 that is at least one of an iron core and a permanent magnet core.

[0039] Please refer to Figure 1 to Figure 2 As shown, the second solenoid valve group 40 has at least two solenoid valves 31. At least two solenoid valves 31 of the second solenoid valve group 40 are mounted on the circuit board 20 and electrically connected to the circuit board 20, and at least two solenoid valves 31 of the second solenoid valve group 40 are connected in series with each other. Specifically, the solenoid valve 31 includes an air inlet seat 311 and a solenoid valve body 312 that is connected to the air inlet seat 311 in a gas-tight manner. The air inlet seats 311 between two adjacent solenoid valves 31 are connected in series by inserting the first air connection port 311b and the first series connection port 311c. Among them, each of the at least two solenoid valves 31 in the second solenoid valve group 40 can independently be a two-position three-way solenoid valve or a three-position three-way solenoid valve.

[0040] In some embodiments, please refer to Figure 2 - Figure 4 , for the solenoid valves 31 of the first solenoid valve group 30 and the second solenoid valve group 40, wherein, the solenoid valve body 312 has an inflation nozzle 313 that is communicated with the inflation port 3121c, and one end of the inflation nozzle 313 extends out of the housing 10 to facilitate the quick air connection of the device to be inflated.

[0041] For the connection of at least two solenoid valves 31 of the first solenoid valve group 30 to the intake pipe 50, please refer to Figure 2 , the intake pipe 50 is independently arranged relative to the housing 10, reducing the forming difficulty of the housing 10 and the assembly process difficulty and cost of the overall gas distribution device 100. Please refer to Figure 3 - Figure 4 , the above intake pipe 50 has an intake nozzle 51 and an intake air flow channel 50a that is communicated with the intake nozzle 51. The intake air flow channel 50a is provided with a second air connection port 50b that can be inserted into the first series connection port 311c of the air inlet seat 311, and the intake air flow channel 50a is connected in series with at least two solenoid valves 31 of the first solenoid valve group 30. When gas is input into the intake nozzle 51, the gas sequentially passes through the intake air flow channel 50a and the second air connection port 50b and then enters the intake channels 311a of each solenoid valve 31 of the first solenoid valve group 30, waiting to supply gas to the solenoid valve body 312 of the solenoid valve 31. In addition, part of the intake nozzle 51 extends out of the outer surface of the housing 10, facilitating the quick air connection with the gas source device.

[0042] A seal ring 70 is provided at the connection between the above-mentioned intake pipe 50 and the solenoid valve 31 connected in series with the first solenoid valve group 30 to prevent air leakage between the intake pipe 50 and the solenoid valve 31 connected in series with the first solenoid valve group 30. Specifically, the seal ring 70 is sleeved on the second air intake port 50b of the intake pipe 50 or the first series connection port 311c of the intake seat 311. For example, when sleeved on the first series connection port 311c of the intake seat 311, the inner ring of the seal ring 70 is in sealing contact with the outer wall of the first series connection port 311c, and a part of the seal ring 70 protrudes from the outer wall surface of the first series connection port 311c. When the first series connection port 311c is inserted into the second air intake port 50b of the intake pipe 50, the outer ring of the seal ring 70 is in sealing contact with the inner wall of the second air intake port 50b of the intake pipe 50 to achieve sealing.

[0043] Regarding the above-mentioned second solenoid valve group 40, please refer to Figure 2 , the second solenoid valve group 40 has at least two solenoid valves 31 arranged in sequence, and at least two solenoid valves 31 of the second solenoid valve group 40 are connected to the intake pipe 50. When gas is input into the intake pipe 50, the intake pipe 50 supplies gas to at least two solenoid valves 31 of the second solenoid valve group 40 respectively. The circuit board 20 can control the connection or disconnection between at least the solenoid valves 31 of the second solenoid valve group 40 and the corresponding devices to be inflated. When the circuit board 20 controls the connection between the solenoid valve 31 and the device to be inflated, the gas input into the intake pipe 50 is transported to the device to be inflated through the solenoid valve 31.

[0044] For the connection between at least two solenoid valves 31 of the second solenoid valve group 40 and the intake pipe 50, please refer to Figure 3 - Figure 4 , the intake air flow channel 50a of the intake pipe 50 is provided with a second series connection port 50c that can be inserted into the first air intake port 311b of the intake seat 311, and the intake air flow channel 50a is connected in series with at least two solenoid valves 31 of the second solenoid valve group 40. When gas is input into the air intake nozzle 51, the gas passes through the intake air flow channel 50a and the second series connection port 50c in sequence and then enters the intake channels 311a of the respective solenoid valves 31 of the second solenoid valve group 40, waiting to supply gas to the solenoid valve body 312 of the solenoid valve 31.

[0045] A sealing ring 70 is provided at the connection between the above-mentioned intake pipe 50 and the solenoid valve 31 connected in series with the second solenoid valve group 40 to prevent air leakage between the intake pipe 50 and the solenoid valve 31 connected in series with the second solenoid valve group 40. Specifically, the sealing ring 70 is sleeved on the second connection port 50c of the intake pipe 50 or the first air connection port 311b of the air intake seat 311. For example, when sleeved on the second connection port 50c of the intake pipe 50, the inner ring of the sealing ring 70 is in sealing contact with the outer wall of the second connection port 50c, and a part of the sealing ring 70 protrudes from the outer wall surface of the second connection port 50c. When the intake pipe 50 is inserted into the first air connection port 311b of the solenoid valve 31, the outer ring of the sealing ring 70 is in sealing contact with the inner wall of the first air connection port 311b of the air intake passage 311a, achieving sealing at the insertion point.

[0046] In some embodiments, for the solenoid valves 31 of the above-mentioned first solenoid valve group 30 and second solenoid valve group 40, a first limiting block 3111 is provided at one end of the air intake seat 311 of each solenoid valve 31 corresponding to the first air connection port 311b, and a first limiting groove 311d is provided at one end of the air intake seat 311 corresponding to the first connection port 311c. When two adjacent solenoid valves 31 are inserted and installed, after the air intake seats 311 of the two adjacent solenoid valves 31 are connected in series with each other, they rotate relative to each other and the first limiting block 3111 is snapped into the first limiting groove 311d to limit the separation of the two adjacent solenoid valves 31 in the series connection direction, ensuring the series connection stability among multiple solenoid valves 31 in the same group.

[0047] In some embodiments, a second limiting block 52 is provided at one end of the intake pipe 50 corresponding to the second air connection port 50b. When the solenoid valve 31 of the first solenoid valve group 30 and the intake pipe 50 are installed, the first limiting groove 311d at one end of the air intake seat 311 corresponding to the first connection port 311c corresponds to the second limiting block 52. After the intake pipe 50 and the air intake seat 311 of the connected solenoid valve 31 are connected in series, they rotate relative to each other and the second limiting block 52 is snapped into the first limiting groove 311d to limit the separation of the intake pipe 50 and the connected solenoid valve 31 in the series connection direction, ensuring the series connection stability between the multiple solenoid valves 31 of the first solenoid valve group 30 and the intake pipe 50.

[0048] In some embodiments, a second limiting groove 50d is provided at one end of the intake pipe 50 corresponding to the second series interface 50c. When the solenoid valve 31 of the second solenoid valve group 40 and the intake pipe 50 are installed, the second limiting groove 50d at one end of the intake seat 311 of the solenoid valve 31 corresponding to the second series interface 50c corresponds to the first limiting block 3111. After the intake pipe 50 is serially connected to the intake seat 311 of the serially connected solenoid valve 31, they rotate relative to each other and the second limiting block 52 is snapped into the second limiting groove 50d to limit the separation of the intake pipe 50 and the adjacent solenoid valve 31 in the serial connection direction, ensuring the serial connection stability between the multiple solenoid valves 31 of the second solenoid valve group 40 and the intake pipe 50.

[0049] In addition, the gas distribution device 100 of the embodiment of the present invention further includes a pressure regulating valve 60. Please refer to Figure 2 - Figure 6 , the pressure regulating valve 60 is installed on the circuit board 20 and electrically connected to the circuit board 20. Moreover, the pressure regulating valve 60 is serially connected to at least two solenoid valves 31 of the first solenoid valve group 30, specifically serially connected to the intake seats 311 of the multiple solenoid valves 31. Alternatively, the pressure regulating valve 60 is serially connected to at least two solenoid valves 31 of the second solenoid valve group 40, specifically serially connected to the intake seats 311 of the multiple solenoid valves 31. Alternatively, the pressure regulating valve 60 can be serially connected to the intake pipe 50, so as to perform pressure relief protection when the pressure of the intake air path of the gas distribution device 100 reaches or exceeds the threshold.

[0050] Optionally, the pressure regulating valve 60 is provided in the first solenoid valve group 30, and the pressure regulating valve 60 is serially connected and communicated with the intake seats 311 of at least two solenoid valves 31 of the first solenoid valve group 30.

[0051] In some preferred embodiments, the pressure regulating valve 60 may be an electromagnetic pressure regulating valve, and is mounted on the circuit board 20 and electrically connected to the circuit board 20. The pressure regulating valve 60 includes a pressure regulating valve body 61, a pressure regulating valve core 62, and a pressure regulating coil 63. The pressure regulating valve body 61 is provided with a pressure regulating channel 61a, a pressure regulating air inlet 61b and an air leakage hole 61c connected to the pressure regulating channel 61a. The pressure regulating air inlet 61b is connected in series to the air inlet seat 311 of the electromagnetic valve 31, and the air leakage hole 61c is connected to the outside atmosphere. The pressure regulating coil 63 is wound around the pressure regulating valve body 61, and the pressure regulating valve core 62 is arranged in the pressure regulating channel 61a. When the air pressure of the air inlet path of the gas distribution device 100 does not reach the threshold value, the pressure regulating coil 63 passes a positive current and generates a positive magnetic field, and the pressure regulating valve core 62 normally blocks the pressure regulating air inlet hole 61b under the action of excitation; when the air pressure of the air inlet path of the gas distribution device 100 reaches or exceeds the threshold value, the pressure regulating coil 63 passes a reverse current and generates a reverse magnetic field, and the pressure regulating valve core 62 moves to open the pressure regulating air inlet hole 61b under the action of excitation, and connects the pressure regulating air inlet hole 61b with the air release hole 61c to achieve pressure relief and pressure regulation. Optionally, a reset member such as a spring can also be provided to prompt the pressure regulating valve core 62 to normally block the pressure regulating air inlet hole 61b when the air pressure of the air inlet path of the gas distribution device 100 does not reach the threshold value.

[0052] In some other embodiments, the pressure regulating valve 60 can be a mechanical pressure regulating valve, which includes a pressure regulating valve body 61, a pressure regulating valve core 62 and an elastic member (not shown). The pressure regulating valve body 61 is provided with a pressure regulating channel 61a and a pressure regulating air inlet hole 61b and an air leakage hole 61c connected to the pressure regulating channel 61a. The pressure regulating air inlet hole 61b is connected in series to the air inlet seat of the solenoid valve 31, and the air leakage hole 61c is connected to the outside atmosphere. The pressure regulating valve core 62 is arranged in the pressure regulating channel 61a. The elastic member can be selected as a spring. One end of the elastic member is connected to the end of the pressure regulating valve core 62 that is away from the pressure regulating air inlet hole 61b, and the other end of the elastic member is connected to the pressure regulating valve body 61, and the elastic member is kept in a compressed state to prompt the pressure regulating valve core 62 to normally keep blocking the pressure regulating air inlet hole 61b. When the air pressure in the air inlet path of the gas distribution device 100 reaches or exceeds the threshold value, the gas pressure pushes the pressure regulating valve core 62 to move away from the pressure regulating air inlet hole 61b, and the pressure regulating valve core 62 opens the pressure regulating air inlet hole 61b to connect the pressure regulating air inlet hole 61b with the air leakage hole 61c to achieve pressure relief and pressure regulation.

[0053] In a preferred embodiment, the pressure regulating valve 60 can be connected in series to the head end, tail end or middle of the arrangement order of at least two solenoid valves 31 of the first solenoid valve group 30, without limitation. Moreover, the series connection between the pressure regulating valve 60 and the air inlet seat 311 of the solenoid valve 31 can be similar to the series connection between the first air inlet 311b and the first serial port 311c.

[0054] In the specific embodiment shown, the pressure regulating valve 60 is connected in series at the end of at least two solenoid valves 31 of the first solenoid valve group 30 that is far from the intake pipe 50 in the arrangement order. For the connection between the pressure regulating valve 60 and the intake seat 311 of the solenoid valve 31, please refer to Figure 3 - Figure 6 , the first series connection port 311c of the solenoid valve 31 is inserted into the pressure regulating intake hole 61b of the pressure regulating valve 60. When gas is input into the intake pipe 50, when the air pressure at the intake pipe 50 and the intake end of the solenoid valve 31 is greater than the threshold value, the gas in the intake pipe 50 sequentially enters each intake seat 311 through series connection and then enters the pressure regulating channel 61a through the pressure regulating intake hole 61b, and is discharged through the air release hole 61c.

[0055] For the series connection between the pressure regulating valve 60 and the solenoid valve 31, a sealing ring 70 is used for sealing to prevent air leakage between the pressure regulating valve 60 and the solenoid valve 31. Specifically, please refer to Figure 3 , the sealing ring 70 is sleeved on the pressure regulating intake hole 61b or the first series connection port 311c of the solenoid valve 31. If it is sleeved on the first series connection port 311c of the solenoid valve 31, the inner ring of the sealing ring 70 is sealed and abutted against the outer wall of the first series connection port 311c of the solenoid valve 31, and a part of the sealing ring 70 protrudes from the outer wall surface of the first series connection port 311c. When the first series connection port 311c of the solenoid valve 31 is inserted into the pressure regulating intake hole 61b of the pressure regulating valve 60, the outer ring of the sealing ring 70 is sealed and abutted against the inner wall of the pressure regulating intake hole 61b of the pressure regulating valve 60 to achieve sealing.

[0056] In some embodiments, a third limiting block 64 is provided at one end of the pressure regulating valve 60 corresponding to the pressure regulating intake hole 61b, and a first limiting groove 311d is provided at one end of the intake seat 311 corresponding to the first series connection port 311c. When the pressure regulating valve 60 and the solenoid valve 31 are inserted and installed, after the pressure regulating valve 60 and the intake seat 311 of the series-connected solenoid valve 31 are connected in series, they rotate relative to each other and the third limiting block 64 is snapped into the first limiting groove 311d to limit the separation of the pressure regulating valve 60 and the series-connected solenoid valve 31 in the series connection direction, ensuring the series connection stability between the multiple solenoid valves 31 of the first solenoid valve group 30 and the pressure regulating valve 60.

[0057] The present invention also provides an embodiment of a pneumatic comfort system. The pneumatic comfort system includes a gas source device, the above-mentioned gas distribution device 100, and an airbag. The gas source device is connected to the airbag through the gas distribution device 100 for ventilation. Specifically, the gas output end of the gas source device is connected to the intake nozzle 51 of the intake pipe 50 of the gas distribution device 100, and the inflation nozzles 313 of the solenoid valves 31 of the first solenoid valve group 30 and the inflation nozzles 313 of the solenoid valves 31 of the second solenoid valve group 40 are respectively connected to an airbag for ventilation. During operation, the gas source device supplies gas, and each solenoid valve 31 of the gas distribution device 100 controls the inflation and deflation of the corresponding airbag.

[0058] Among them, the above pneumatic comfort system can be one or more of a pneumatic massage system, a pneumatic lumbar support system, and a pneumatic side wing support system. The corresponding air bags are massage air bags, lumbar support air bags, and side wing air bags.

[0059] When the pneumatic comfort system integrates a pneumatic massage system, a pneumatic lumbar support system, and a pneumatic side wing support system, the electromagnetic valves 31 on the corresponding gas distribution device 100 include two-way three-way electromagnetic valves and three-way three-way electromagnetic valves; specifically, among at least two electromagnetic valves 31 of the first electromagnetic valve group 30, at least one can be a two-way three-way electromagnetic valve and at least one can be a three-way three-way electromagnetic valve, and / or, among at least two electromagnetic valves 31 of the second electromagnetic valve group 40, at least one can be a two-way three-way electromagnetic valve and at least one can be a three-way three-way electromagnetic valve. According to the control function requirements, the air bags of the pneumatic lumbar support system and the pneumatic side wing support system are connected to the three-way three-way electromagnetic valve and can realize inflation, deflation, and pressure holding control, and the air bags of the pneumatic massage system are connected to the two-way three-way electromagnetic valve and can realize inflation and deflation control.

[0060] Optionally, in the above pneumatic comfort system, the air source device is preferably but not limited to an air pump, an air compressor, or an integrated device with a pump and a valve. For the specific structure and function of the gas distribution device 100, reference can be made to the above embodiments, and details are not described here one by one.

[0061] It should be noted that the description and drawings of the present invention give preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not additional limitations to the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive. Further, the above technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as within the scope described in the description of the present invention; furthermore, for those of ordinary skill in the art, improvements or changes can be made according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

1. A gas distribution device, characterized in that: include: case; A circuit board is arranged in the housing; A first solenoid valve group, comprising at least two solenoid valves, wherein the at least two solenoid valves of the first solenoid valve group are mounted on the circuit board and electrically connected to the circuit board; A second solenoid valve group, comprising at least two solenoid valves, wherein the at least two solenoid valves of the second solenoid valve group are mounted on the circuit board and electrically connected to the circuit board; An intake pipe has an intake nozzle and an intake flow passage connected to the intake nozzle, and the intake flow passage is respectively ventilated and connected to at least two solenoid valves of the first solenoid valve group and at least two solenoid valves of the second solenoid valve group. The gas entering into the intake flow passage from the intake nozzle can be supplied to the at least two solenoid valves of the first solenoid valve group and the at least two solenoid valves of the second solenoid valve group, respectively.

2. The gas distribution device according to claim 1, characterized in that: The solenoid valve includes an air intake seat and a solenoid valve body. An air intake channel is arranged in the air intake seat. One end of the air intake channel is a first air connection port, and the other end is a first serial interface that can be plugged into the first air connection port of another air intake seat. The air intake seats of two adjacent solenoid valves in the same group are connected in series with each other and the air intake channels of the two adjacent solenoid valves are connected. An air flow channel connected to the air intake channel of the air intake seat is arranged in the solenoid valve body.

3. The gas distribution device according to claim 2, characterized in that: A first limit block is provided at one end of the air inlet seat corresponding to the first air inlet, and a first limit groove is provided at one end of the air inlet seat corresponding to the first serial interface. The air inlet seats of two adjacent solenoid valves are connected in series and rotated relative to each other so that the first limit block is clamped in the first limit groove to limit the separation of the two adjacent solenoid valves in the serial connection direction.

4. The gas distribution device according to claim 2, characterized in that: The intake air passage is provided with a second air inlet which can be plugged into the first serial port of the intake seat, and the intake air passage is connected in series with at least two solenoid valves of the first solenoid valve group.

5. The gas distribution device according to claim 4, characterized in that: A second limit block is provided on the end of the air intake pipe corresponding to the second air inlet, and a first limit groove is provided on the end of the air intake seat corresponding to the first serial interface. After being connected in series, the air intake pipe and the air intake seat of the serially connected solenoid valve rotate relatively and make the second limit block clamped in the first limit groove to limit the air intake pipe and the serially connected solenoid valve from separating from each other in the serial connection direction.

6. The gas distribution device according to claim 2, characterized in that: The air intake passage is provided with a second serial interface which can be plugged into the first air inlet of the air intake seat, and the air intake passage is serially connected to at least two solenoid valves of the second solenoid valve group.

7. The gas distribution device according to claim 6, characterized in that: A second limiting groove is provided on the end of the air intake pipe corresponding to the second serial interface, and a first limiting block is provided on the end of the air intake seat corresponding to the first air inlet. After the air intake pipe and the air intake seat of the adjacent solenoid valve are connected in series, they are relatively rotated and the first limiting block is clamped in the second limiting groove to limit the separation of the air intake pipe and the adjacent solenoid valve in the serial connection direction.

8. The gas distribution device according to claim 2, characterized in that: The gas distribution device is provided with a sealing ring for preventing air leakage during the plugging of the first gas inlet and the first serial interface.

9. The gas distribution device according to any one of claims 1 to 8, characterized in that: The gas distribution device is provided with a pressure regulating valve, which is mounted on the circuit board and electrically connected to the circuit board; the pressure regulating valve is ventilated and connected to at least two solenoid valves of the first solenoid valve group.

10. A pneumatic comfort system, characterized in that: It comprises a gas source device, a gas distribution device according to any one of claims 1 to 9, and an air bag, wherein the gas source device is ventilatedly connected to the air bag through the gas distribution device.

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