Overpressure safety valve and pneumatic comfort system

Abstract

The utility model relates to the technical field of pneumatic comfort equipment, and discloses an overpressure safety valve and a pneumatic comfort system. The overpressure safety valve comprises a valve body, a valve element and a reset element. The valve body is provided with an air inlet flow channel and an air outlet flow channel. The valve body is provided with a communicating chamber, an air inlet, an air outlet and a communicating opening, the air inlet, the air outlet and the communicating opening are communicated with the communicating chamber, the air inlet flow channel is communicated with the communicating chamber through the air inlet and the communicating opening, and the air outlet flow channel is communicated with the communicating chamber through the air outlet. The valve core is arranged in the conduction chamber; the reset element drives the valve element to seal the air inlet. The valve element can move to seal the air outlet under the action of high-pressure inlet air pressure. According to the overpressure safety valve disclosed by the utility model, the conduction opening is arranged, so that the smoothness of air intake can be ensured during low-pressure air intake; and during high-pressure air inlet, the valve element can seal the air outlet in time, and then the overpressure protection effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic comfort equipment technical field, especially pneumatic comfort system of overpressure safety valve. BACKGROUND

[0002] In prior art, overpressure protection is arranged in the air inlet gas path of the pneumatic system, and a pressure relief valve is usually arranged in parallel connection on the gas path. The pressure relief valve is composed of a shell and a valve core. The shell is provided with a through chamber for mounting the valve core. The two ends of the through chamber are respectively provided with an air inlet and an air outlet in communication. The air inlet is connected to the air inlet gas path, and the air outlet is connected to the atmosphere. A spring is arranged in abutment between the valve core and the inner wall of the air outlet. The valve core is usually arranged to be normally closed to the air inlet by the elastic force of the spring, and when the air pressure of the air inlet is too large, the gas pressure overcomes the elastic force of the spring to open the air inlet, so that the high-pressure gas in the gas path can flow out to the atmosphere through the air inlet and the air outlet, realizing pressure relief protection.

[0003] However, although the pressure relief valve can play a role in overpressure protection of the air inlet gas path, when the air pressure of the gas path is too large, the corresponding air pressure has been transmitted to the gas-using element, and the gas-using element cannot be protected in time, which may cause damage to the gas-using element before the pressure relief is completed. UTILITY MODEL CONTENT

[0004] In order to solve the problems of the prior art, the utility model provides an overpressure safety valve and a pneumatic comfort system, which can avoid the problems that when the air pressure of the gas path is too large, the corresponding air pressure has been transmitted to the gas-using element, and the gas-using element cannot be protected in time, resulting in damage to the gas-using element.

[0005] The technical effects achieved by the utility model are realized through the following aspects:

[0006] In a first aspect, the utility model provides an overpressure safety valve, which comprises a valve body, a valve core and a reset element.

[0007] The valve body is provided with an air inlet flow channel and an air outlet flow channel. The valve body is provided with a through chamber, an air inlet, an air outlet and a through port in communication with the through chamber. The air inlet flow channel is connected to the through chamber through the air inlet and the through port. The air outlet flow channel is connected to the through chamber through the air outlet.

[0008] The valve core is arranged in the through chamber. The valve core has a first position state of closing the air inlet and opening the air outlet to make the through port and the air outlet in fluid communication under the action of a first air inlet pressure, a second position state of opening the air inlet and the air outlet to make the air inlet, the through port and the air outlet in fluid communication under the action of a second air inlet pressure, and a third position state of closing the air outlet under the action of a third air inlet pressure.

[0009] The reset element drives the valve core to close the air inlet.

[0010] In some implementations, the valve body is provided with an air inlet nozzle arranged at the end of the air inlet channel.

[0011] In some implementations, the valve body is provided with an air outlet nozzle arranged at the end of the air outlet channel.

[0012] In some implementations, the air inlet channel has an extension extending to the through chamber, the air inlet is arranged at the end of the extension, and the through port is arranged on the sidewall of the extension.

[0013] In the present implementation, when the valve core is abutted against the air inlet under the driving action of the reset element, the air flow in the air inlet channel enters the through chamber through the through port, specifically, the air flow in the air inlet channel enters the gap between the inner wall of the through chamber and the valve core, and then enters the air outlet and is supplied to the gas using element through the air outlet channel, ensuring smooth gas supply.

[0014] In some implementations, the valve body includes a valve body and an end cover, the valve body is provided with a through groove, and the end cover is sealed and covered on the valve body to enclose the through groove to form the through chamber.

[0015] In the present implementation, the valve core and the reset element are installed in the through groove, and the end cover is covered on the valve body so that one end of the reset element is abutted against the inner wall of the end cover, and the air outlet and the air outlet channel are arranged on the end cover, improving the compactness of the overall structure and facilitating assembly.

[0016] In some implementations, the air inlet channel, the air inlet, and the through port are arranged in the valve body, and the air outlet channel and the air outlet are arranged in the end cover.

[0017] In some implementations, the valve core is provided with a first sealing element for sealing and closing the air inlet.

[0018] In some implementations, the valve core is provided with a second sealing element for sealing and closing the air outlet.

[0019] In some implementations, the reset element includes a spring that elastically drives the valve core to close the air inlet.

[0020] In the present implementation, the reset element includes a spring, so that the valve core can be driven by the elastic driving action of the reset element to block the air inlet under the action of the first gas pressure.

[0021] The second aspect of the utility model provides a kind of pneumatic comfort system, including gas source device, gas element and the overpressure safety valve described above, the gas source device is connected to the gas element by the overpressure safety valve.

[0022] To sum up, the utility model has at least the following advantages:

[0023] (1) the overpressure safety valve provided by the utility model, the valve core is movably arranged in the through chamber of the valve body, and the valve core is sealed to the air inlet by the driving of the reset element, when the airflow pressure of the air inlet is less than the driving force of the reset element, the valve core seals the air inlet, and the airflow flows to the air outlet through the through port to realize the supply of gas, when the airflow pressure of the air inlet and the driving force of the reset element tend to be balanced, the valve core simultaneously opens the air inlet and the air outlet, and the airflow flows to the air outlet through the air inlet and the through port to realize the supply of gas, when the airflow pressure of the air inlet is greater than the driving force of the reset element, the valve core is displaced to close the air outlet, thereby interrupting the supply of gas. By arranging the through port, when low-pressure air is introduced, the air inlet can be ensured to be unobstructed, and when high-pressure air is introduced, the valve core can timely close the air outlet, thereby playing the role of overpressure protection.

[0024] (2) the pneumatic comfort system provided by the utility model is provided with the overpressure safety valve on the gas circuit, can actively adjust the flow size of the gas circuit according to the gas source pressure, and can timely cut off the supply of gas when the gas source pressure is too large, thereby providing timely overpressure protection for the gas circuit and the gas element, and avoiding the problem of damage of the gas element under high gas pressure. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The assembly cross-sectional view of the overpressure safety valve provided by the embodiment of the utility model is shown in the figure.

[0026] Figure 2 The assembly cross-sectional view of the overpressure safety valve provided by the embodiment of the utility model is shown in the figure.

[0027] Figure 3 The structure diagram of the overpressure safety valve provided by the embodiment of the utility model is shown in the figure.

[0028] Figure 4 The explosion diagram of the overpressure safety valve provided by the embodiment of the utility model is shown in the figure.

[0029] Figure 5 The structure diagram of the pneumatic comfort system provided by the embodiment of the utility model is shown in the figure.

[0030] Markings in the figure:

[0031] 1, overpressure safety valve;

[0032] 10, valve body; 101, conducting chamber; 102, air inlet; 103, air outlet; 104, conducting port; 11, air inlet flow channel; 111, extension; 12, air outlet flow channel; 13, air inlet nozzle; 14, air outlet nozzle; 15, valve body; 151, conducting groove; 152, clamping portion; 16, end cover; 161, clamping hole; 162, sealing element;

[0033] 20, valve core; 21, first sealing element; 22, second sealing element; 23, protruding portion;

[0034] 30, reset element;

[0035] 2, pneumatic comfort system;

[0036] 40, air source device;

[0037] 50, gas using element;

[0038] 60, air distribution device. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. The described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application.

[0040] Therefore, the detailed description of the embodiments of the present application provided below in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0041] In the first aspect, please refer to the drawings Figure 1 The drawings Figure 4 The overpressure safety valve 1 provided by the embodiments of the present application comprises a valve body 15, a valve core 20 and a reset element 30.

[0042] Among them, please combine Figure 1 and Figure 2 , Figure 1 and Figure 2The structure relationship of the valve body 10, the valve core 20 and the reset element 30 in the embodiment of the utility model is shown. Specifically, the valve body 15 is provided with the air inlet channel 11 and the air outlet channel 12; and the valve body 15 is provided with the through chamber 101 and the air inlet 102, the air outlet 103 and the through port 104 communicated with the through chamber 101, the air inlet channel 11 is communicated with the through chamber 101 through the air inlet 102 and the through port 104, and the air outlet channel 12 is communicated with the through chamber 101 through the air outlet 103; the valve core 20 is arranged in the through chamber 101; the valve core 20 has the first position state of closing the air inlet 102 and opening the air outlet 103 under the action of the first air inlet pressure to make the through port 104 and the air outlet 103 fluidly connected, the second position state of opening the air inlet 102 and the air outlet 103 under the action of the second air inlet pressure to make the air inlet 102 and the through port 104 and the air outlet 103 fluidly connected, and the third position state of closing the air outlet 103 under the action of the third air inlet pressure; and the reset element 30 drives the valve core 20 to close the air inlet 102.

[0043] In the embodiment of the utility model, the valve core 20 is movably arranged in the through chamber 101 of the valve body 10, the reset element 30 is connected between the inner wall of the through chamber 101 and the valve core 20, so that the valve core 20 can normally close the air inlet 102 of the valve body 10 under the driving action of the reset element 30, or close the air outlet 103 of the valve body 10 under the pressure action of the high-pressure gas source, or open the air inlet 102 and the air outlet 103 under the pressure of the gas source and the driving force of the reset element 30 to make the air inlet 102, the through port 104 and the air outlet 103 fluidly connected. When the valve core 20 is in the first position state of closing the air inlet 102, the valve core 20 is abutted and sealed to the air inlet 102, and the airflow is communicated to the air outlet 103 through the through port 104 to realize the supply of the gas; when the valve core 20 is in the second position state, the valve core 20 is located between the air inlet 102 and the air outlet 103, the air inlet 102 and the air outlet 103 are opened, and the airflow is communicated to the air outlet 103 through the air inlet 102 and the through port 104 to realize the supply of the gas; when the valve core 20 is in the third position state of closing the air outlet 103, the valve core 20 is abutted to the air outlet 103 to realize the interruption of the gas circuit, and then the gas supply is interrupted to avoid the problem that the high-pressure gas source is not timely interrupted to cause damage to the gas-using element.

[0044] Specifically, in actual working process, when the air pressure in the air inlet channel 11 is a first air inlet pressure, which can be an atmospheric pressure or a gas source pressure slightly greater than the atmospheric pressure, the air flow pressure is less than the driving force of the reset element 30, i.e. the first air inlet pressure is less than the driving force of the reset element 30, so that the air flow is insufficient to open the air inlet port 102, the air inlet port 102 is kept closed, at this time the air flow enters the air outlet port 103 through the through port 104 to supply the gas to the gas using element. When the air pressure in the air inlet channel 11 is a second air inlet pressure, which is a gas source pressure greater than the first air inlet pressure, the air flow pressure partially overcomes the driving force of the reset element 30, i.e. the second air inlet pressure partially overcomes the driving force of the reset element 30 and reaches a balance with the reset element 30, opens the air inlet port 102 by a small amplitude, the air flow can enter the gap between the inner wall of the through chamber 101 and the valve core 20 through the air inlet port 102 and the through port 104, and then enters the air outlet port 103 and the air outlet channel 12 to supply the gas to the gas using element. When the air pressure in the air inlet channel 11 is a third air inlet pressure, which is a gas source pressure greater than the first air inlet pressure, the air flow pressure is greater than the driving force of the reset element 30, i.e. the third air inlet pressure completely overcomes the driving force of the reset element 30, pushes the valve core 20 to displace to close the air outlet port 103, and further makes the through between the air inlet port 102 and the air outlet port 103 interrupted, and interrupts the gas source to supply the gas to the gas using element. When the gas source pressure is less than the driving force of the reset element 30 again, the air outlet port 103 will be opened again to make the through between the air inlet port 102 and the air outlet port 103 reconnected, and the air flow can re-supply the gas to the gas using element through the air outlet channel 12.

[0045] The overpressure safety valve 1 described above, the valve core 20 is movably arranged in the through chamber 101 of the valve body 10, and the reset element 30 is connected between the inner wall of the through chamber 101 and the valve core 20. When the air flow pressure of the air inlet channel 11 is less than the driving force of the reset element 30, the valve core 20 abuts and seals the air inlet port 102, the air flow passes through the through port 104 to the air outlet port 103 to realize the gas supply. When the air flow pressure of the air inlet channel 11 and the driving force of the reset element 30 tend to be balanced, the valve core 20 is displaced to the air inlet port 102 and the air outlet port 103 and opens the air inlet port 102 and the air outlet port 103 at both ends, respectively, the air flow passes through the air inlet port 102 and the through port 104 to the air outlet port 103 to realize the gas supply. When the air flow pressure of the air inlet port 102 is greater than the driving force of the reset element 30, the valve core 20 is pushed to displace to close the air outlet port 103, and further interrupts the gas source to supply the gas to the gas using element. By arranging the through port 104, when the air inlet pressure is low, the air inlet can be ensured to be smooth, and when the air inlet pressure is high, the valve core 20 can timely close the air outlet port 103, and further plays a high pressure protection role.

[0046] In some preferred embodiments, please refer to Figure 3 as shown, Figure 3 The structural relationship between the valve body 10 and the air inlet nozzle 13 in the embodiment of the utility model is shown. Specifically, the valve body 10 is provided with the air inlet nozzle 13, and the air inlet nozzle 13 is arranged at the end of the air inlet flow channel 11. In operation, the air inlet nozzle 13 is connected to the air pipe of the air source device, so that the air inlet flow channel 11 is in fluid communication with the air source device, facilitating the connection of the overpressure safety valve 1 with the air pipe of the air source device, facilitating the assembly of the pneumatic system, and improving the reliability of the overall structure.

[0047] In some preferred embodiments, the valve body 10 is provided with an air outlet nozzle 14 arranged at the end of the air outlet flow channel 12. In operation, the air outlet nozzle 14 is connected to the air pipe of the gas-using element, facilitating the fluid communication between the overpressure safety valve 1 and the gas-using element.

[0048] It can be understood that the air inlet nozzle 13 and the air outlet nozzle 14 are both arranged in a conical shape and have a reverse buckle. During installation, the air pipe ends of the air supply device and the gas-using element are elastically sleeved into the air inlet nozzle 13 and the air outlet nozzle 14, respectively, so that the air pipe is sealingly connected with the air inlet nozzle 13 and the air outlet nozzle 14, and the air supply device, the overpressure safety valve 1 and the gas-using element are sealingly connected.

[0049] In some preferred embodiments, please refer to Figure 2 as shown, Figure 2 The structural relationship between the guide opening 104 and the air inlet 102 in the embodiment of the utility model is shown. Specifically, the air inlet flow channel 11 has an extension 111 extending to the guide chamber 101, the air inlet 102 is arranged at the end of the extension 111, and the guide opening 104 is arranged on the side wall of the extension 111. When the valve core 20 is abutted and sealed to the air inlet 102 under the driving force of the reset element 30, the gas in the air inlet flow channel 11 enters the guide chamber 101 through the guide opening 104, specifically, the gas in the air inlet flow channel 11 enters the gap between the inner wall of the guide chamber 101 and the valve core 20 through the guide opening 104, and then enters the air outlet 103 and is supplied to the gas-using element through the air outlet flow channel 12, so as to realize air supply. When the valve core 20 is abutted and sealed to the air outlet 103 under the pressure of the gas flow, the gas in the air inlet flow channel 11 enters the guide chamber 101 through the air inlet 102 and the guide opening 104, specifically, the gas in the air inlet flow channel 11 enters the gap between the inner wall of the guide chamber 101 and the valve core 20 through the air inlet 102 and the guide opening 104, and since the air outlet 103 is blocked by the valve core 20, the gas is cut off in the guide chamber 101.

[0050] It should be noted that the through port 104 is not limited to the way that the gas enters the gap between the valve core 20 and the through chamber 101 through the opening of the extension 111 and the communication with the through chamber 101. A sub-flow passage can also be provided between the inlet flow passage 11 and the outlet port 103, and the communication opening of the inlet flow passage 11 is defined as the through port 104. When the inlet port 102 is blocked, the gas flow can pass through the sub-flow passage to the outlet port 103, thereby achieving gas supply to the gas-using element. When the gas flow pressure in the inlet flow passage 11 is greater than the driving force of the reset element 30, the gas flow pushes the valve core 20 to displace and abut against the sealing of the outlet port 103 and the sealing communication of the outlet port 103, thereby cutting off the gas flow in the sub-flow passage and blocking the outlet port 103.

[0051] In some preferred embodiments, the valve core 20 is provided with a first sealing member 21, which is optionally but not limited to a silica gel pad, and is arranged at one end of the valve core 20 facing the inlet port 102, for sealing and closing the inlet port 102 when the valve core 20 is in the first position state, thereby improving the sealing air tightness.

[0052] In some preferred embodiments, the valve core 20 is provided with a second sealing member 22, which is optionally but not limited to a silica gel pad, and is arranged at one end of the valve core 20 facing the outlet port 103, for sealing and closing the outlet port 103 when the valve core 20 is in the third position state, thereby improving the sealing air tightness.

[0053] The two ends of the valve core 20 are respectively provided with the first sealing member 21 for blocking the inlet port 102 and the second sealing member 22 for blocking the outlet port 103, so as to increase the sealing performance of the inlet port 102 and the outlet port 103, avoid gas leakage when the valve core 20 is in the first position state and the third position state, and improve the overpressure safety protection accuracy of the valve core 20. At the same time, the first sealing member 21 and the second sealing member 22 can be optionally a pad body with elasticity, which buffers and protects the valve core 20, thereby avoiding the problem of repeated collision of the valve core 20 with the inlet port 102 or the outlet port 103 when the valve core 20 is displaced by the gas flow pressure or the driving force of the reset element 30, thereby prolonging the service life of the overall structure.

[0054] In some preferred embodiments, the reset element 30 includes a spring, which elastically drives the valve core 20 to close the inlet port 102, so that the valve core 20 can block the inlet port 102 under the elastic action of the reset element 30.

[0055] Specifically, the reset element 30 is selected as a spring, two ends of the spring are respectively abutted against the inner wall of the opening gas outlet 103 of the conduction chamber 101 and the valve core 20, so as to drive the valve core 20 to close the air inlet 102 by the elastic force. Further, the valve core 20 is radially extended with a convex part 23 at one end close to the air inlet 102, and the reset element 30 is sleeved on the valve core 20 and the two ends thereof are respectively elastically abutted against the convex part 23 and the inner wall of the opening gas outlet 103. The connection stability between the reset element 30 and the valve core 20 is improved, and the overall structure is more compact.

[0056] In some preferred embodiments, please combine Figure 3 and Figure 4 , Figure 3 and Figure 4 The structural relationship between the valve body 15 and the end cover 16 in the embodiment of the utility model is shown. Specifically, the valve body 10 comprises the valve body 15 and the end cover 16, the valve body 15 is provided with a conduction groove 151, and the end cover 16 is sealed and covered on the valve body 15 and encloses the conduction groove 151 to form a conduction chamber 101. The valve core 20 and the reset element 30 are installed in the conduction groove 151, the end cover 16 is covered on the valve body 15 so that one end of the reset element 30 is abutted against the inner wall of the end cover 16, the gas outlet 103 and the gas outlet flow channel 12 are provided on the end cover 16, the compactness of the overall structure is improved, and assembly is facilitated. Further, the valve body 15 is provided with a clamping part 152, the end cover 16 is provided with a clamping hole 161 matched with the clamping part 152, and the end cover 16 and the valve body 15 are clamped and covered through the clamping part 152 and the clamping hole 161, so as to improve the installation stability of the overall structure. Still further, the valve body 15 and the end cover 16 are further provided with a sealing element 162, so as to ensure the air tightness of the overall structure.

[0057] In some preferred embodiments, the air inlet flow channel 11, the air inlet 102 and the conduction opening 104 are provided in the valve body 15, and the gas outlet flow channel 12 and the gas outlet 103 are provided in the end cover 16. The gas source gas enters the air inlet 102, the conduction opening 104 and the conduction chamber 101 through the air inlet flow channel 11, and then enters the gas outlet 103 and is supplied to the gas using element through the gas outlet flow channel 12, so as to ensure the reliability of the overall structure.

[0058] Please refer to the accompanying Figure 5 , secondly, on the basis of the above-mentioned embodiments, the utility model embodiment further provides a pneumatic comfort system 2.

[0059] The pneumatic comfort system 2 of the utility model embodiment comprises a gas source device 40, a gas using element 50 and the above-mentioned overpressure safety valve 1.

[0060] Among them, the gas source device 40 is connected to the gas using element 50 through the overpressure safety valve 1.

[0061] In the pneumatic comfort system 2 of the embodiment of the utility model, the air source device 40 includes but is not limited to air pump, air compressor and the like, the air supply port of the air source device 40 is in fluid communication with the air inlet 102 of the overpressure safety valve 1, the air outlet 103 of the overpressure safety valve 1 is in fluid communication with the air using element 50, and the air using element 50 includes air bag, air bag and the like. Further, the pneumatic comfort system 2 can also include the air distribution device 60, and the air distribution device 60 is used to control the inflation and deflation of the air bag, and the air distribution device 60 includes but is not limited to air valve, such as electromagnetic valve, the air outlet 103 of the overpressure safety valve 1 is in fluid communication with the air inlet 102 of the air distribution device 60, and the inflation port of the air distribution device 60 is in fluid communication with the air using element 50. Of course, the air distribution device 60 can also be arranged between the air source device 40 and the overpressure safety valve 1, the air inlet of the air distribution device 60 is communicated with the air outlet of the air source device 40, the air outlet of the air distribution device 60 is communicated with the air inlet 102 of the overpressure safety valve 1, the air outlet 103 of the overpressure safety valve 1 is communicated with the air using element 50, and the air distribution device 60 and the air source device 40 can constitute a pump-valve integrated structure.

[0062] The pneumatic comfort system 2 of the embodiment of the utility model is provided with the above-mentioned overpressure safety valve 1 on the air path, can actively adjust the air path flow size according to the air source pressure, and can timely cut off the air supply when the air source pressure is too large, provides timely overpressure protection for the air path and the air using element 50, and avoids the problem that the air using element 50 is damaged under high air pressure.

[0063] In the utility model, unless there is definite stipulation and limitation, the terms "mount", "connect", "link", "fix" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0064] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawing, or the orientation or position relationship commonly placed when the utility model product is used, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0065] Furthermore, terms like "horizontal," "vertical," "up," "down," "top," "bottom," "side," "end," "front," "back," "upper," "lower," "horizontal," "vertical," and the like are used herein not to denote absolute orientation but to connote a relative orientation. For example, without limitation, "horizontal" refers to a direction that is more horizontal than "vertical," and can not mean perfectly horizontal.

[0066] In the present application, unless specifically stated and limited otherwise, the first feature above or below the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature therebetween. Moreover, the first feature above, over and on the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature below, under and under the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0067] Although the present application is described in conjunction with the specific embodiments, it is obvious that many alternatives, modifications and variations will become apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications and variations as can come within the spirit and scope of the appended claims.

Claims

1. An overpressure safety valve, characterized in that: It comprises a valve body (10), a valve core (20) and a reset element (30); The valve body (10) is provided with an inlet flow channel (11) and an outlet flow channel (12); and the valve body (10) is provided with a conduction chamber (101) and an air inlet (102), an air outlet (103) and a conduction port (104) communicating with the conduction chamber (101); the inlet flow channel (11) is communicated with the conduction chamber (101) through the air inlet (102) and the conduction port (104); and the outlet flow channel (12) is communicated with the conduction chamber (101) through the air outlet (103); The valve core (20) is arranged in the conduction chamber (101); the valve core (20) has a first position state in which the air inlet (102) is closed and the air outlet (103) is opened under the action of a first intake air pressure so that the conduction port (104) and the air outlet (103) are fluidically connected, and a second position state in which the air inlet (102) and the air outlet (103) are opened under the action of a second intake air pressure so that the air inlet (102) and the conduction port (104) are fluidically connected to the air outlet (103), and a third position state in which the air outlet (103) is closed under the action of a third intake air pressure; The reset element (30) drives the valve core (20) to close the air inlet (102).

2. The overpressure safety valve according to claim 1, characterized in that: The valve body (10) is provided with an air inlet nozzle (13), and the air inlet nozzle (13) is provided at the end of the air inlet flow channel (11).

3. The overpressure safety valve according to claim 1, characterized in that: The valve body (10) is provided with an air outlet nozzle (14), and the air outlet nozzle (14) is arranged at the end of the outlet flow channel (12).

4. The overpressure safety valve according to claim 1, characterized in that: The inlet flow channel (11) has an extension portion (111) extending to the conduction chamber (101), the air inlet (102) is opened at the end of the extension portion (111), and the conduction port (104) is opened on the side wall of the extension portion (111).

5. The overpressure safety valve according to claim 1, characterized in that: The valve body (10) comprises a valve main body (15) and an end cover (16), wherein the valve main body (15) is provided with a conducting groove (151), and the end cover (16) is sealingly covered on the valve main body (15) and encloses the conducting groove (151) to form the conducting chamber (101).

6. The overpressure safety valve according to claim 5, characterized in that: The inlet flow channel (11), the air inlet port (102) and the conducting port (104) are provided on the valve body (15), and the outlet flow channel (12) and the air outlet port (103) are provided on the end cover (16).

7. The overpressure safety valve according to claim 1, characterized in that: The valve core (20) is provided with a first sealing member (21) for sealing and closing the air inlet (102).

8. The overpressure safety valve according to claim 1, characterized in that: A second sealing member (22) is provided on the valve core (20) for sealing and closing the air outlet (103).

9. The overpressure safety valve according to claim 1, characterized in that: The reset element (30) comprises a spring, which elastically drives the valve core (20) to close the air inlet (102).

10. A pneumatic comfort system, characterized in that: The invention comprises an air source device (40), an air-using component (50), and an overpressure safety valve (1) according to any one of claims 1 to 9, wherein the air source device (40) is connected to the air-using component (50) via the overpressure safety valve (1).

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