Ventilation device

Abstract

The utility model discloses an air interchanger which comprises a valve body, a cover plate is arranged on the valve body, a first air channel is arranged between the cover plate and the valve body, a first cavity, a second cavity, a first valve port and a second valve port are arranged in the valve body, the first valve port and the second valve port are communicated with the first cavity and the second cavity, the valve body is provided with a first air port, and the first air port is communicated with the second air port. The valve body is provided with a first gas port communicated with the first cavity, the valve body is provided with a second gas port, the second cavity is communicated with the first gas channel through the second gas port, a first one-way valve is movably arranged in the first cavity, a second one-way valve is movably arranged in the second cavity, and when gas enters the second cavity from the second gas port, the first one-way valve opens the first valve port; and when the gas enters the first cavity from the first gas port, the first valve port is sealed by the first one-way valve, the second valve port is opened by the second one-way valve, and the gas is introduced into the second cavity to be exhausted from the second gas port, so that both gas intake and gas exhaust can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ventilation device technical field, especially a ventilation device. BACKGROUND

[0002] During the driving process of the automobile, the cab will inevitably appear the phenomenon of jolt due to the complex and changeable road conditions, and is accompanied by the relatively obvious impact force. The impact force will not only affect the comfort of the driver, but also directly affect the hydraulic oil pump system in the cab of the automobile, resulting in the violent shock of the hydraulic oil in the oil pump, and the pressure in the hydraulic oil pump is increased due to the impact. In addition, the hydraulic system oil pump will cause negative pressure in the system due to the flow of oil during use, which affects the stability of the hydraulic system. In order to balance the internal and external pressures of the hydraulic oil pump and maintain the normal operation of the system, the ventilation device is usually designed and installed in the hydraulic oil pump system. However, the internal structure of the existing ventilation device is usually complex, the processing and maintenance cost is high, and the complex internal structure is more prone to failure, which can easily lead to poor ventilation effect, thereby affecting the stability and reliability of the hydraulic oil pump system. SUMMARY

[0003] The utility model discloses to the defects and insufficiency of prior art, provide a ventilation device, its internal structure is simple and reasonable, and the subsequent maintenance work is convenient, and the simple structure reduces the potential failure point, so that the ventilation device is more stable and reliable in the use process.

[0004] In order to achieve the above object, the utility model adopts the following technical scheme:

[0005] The utility model provides a ventilation device, including valve body, the upper end cover of valve body is equipped with the apron, the inboard wall of apron and valve body form first air channel, be provided with first chamber, second chamber and first valve port in valve body, first valve port is used for connecting first chamber and second chamber, the bottom of valve body is provided with first gas port, first gas port is linked with first chamber, the lateral wall of valve body is provided with second gas port, and second chamber is linked with first air channel through second gas port, first chamber is provided with first check valve, first check valve and first valve port seal cooperation, when gas enters second chamber from first air channel, second gas port, first check valve opens first valve port, and gas is passed into first chamber and enters first gas port, when gas enters first chamber from first gas port, first check valve seals first valve port.

[0006] Further, the first check valve includes a first check valve core and a first spring, the first spring is in abutting cooperation with the first check valve core, and the first spring makes the first check valve core always have a movement tendency of sealing the first valve port.

[0007] Further, the bottom of the valve body is fixedly provided with a piston seat, the first gas port is arranged on the piston seat, one end of the first spring abuts against the first one-way valve core, and the other end of the first spring abuts against the piston seat.

[0008] The utility model provides a kind of ventilation device, including valve body, the upper end cover of the valve body is equipped with cover plate, first air passage is formed between the inboard wall of the cover plate and valve body, first chamber, second chamber and second valve port are provided in the valve body, second valve port is used to connect first chamber and second chamber, the bottom of the valve body is provided with first gas port, first gas port is connected with first chamber, the lateral wall of valve body is provided with second gas port, second chamber is connected with first air passage by second gas port, second chamber is movably provided with second one-way valve, the second one-way valve and second valve port sealingly cooperate, when gas enters second chamber from first air passage, second gas port, the second one-way valve seals second valve port, when gas enters first chamber from first gas port, the second one-way valve opens second valve port, and gas is introduced into second chamber and exhausts to second gas port.

[0009] Further, the second one-way valve includes a second one-way valve core and a second spring, the second spring abuts against the second one-way valve core, and the second spring causes the second one-way valve core to always have a sealing trend for the second valve port.

[0010] Further, the inboard wall of the cover plate is provided with a convex ring portion, and the valve body is provided with a groove corresponding to the convex ring portion.

[0011] The utility model provides a kind of ventilation device, including valve body, the upper end cover of the valve body is equipped with cover plate, first air passage is formed between the inboard wall of the cover plate and valve body, first chamber, second chamber, first valve port and second valve port are provided in the valve body, first valve port and second valve port are connected with first chamber and second chamber, the bottom of the valve body is provided with first gas port, first gas port is connected with first chamber, the lateral wall of valve body is provided with second gas port, second chamber is connected with first air passage by second gas port, first chamber is movably provided with first one-way valve, the first one-way valve and first valve port sealingly cooperate, second chamber is movably provided with second one-way valve, the second one-way valve and second valve port sealingly cooperate, when gas enters second chamber from first air passage, second gas port, the first one-way valve opens first valve port, the second one-way valve seals second valve port, and gas is introduced into first chamber and exhausts to first gas port, when gas enters first chamber from first gas port, the first one-way valve seals first valve port, the second one-way valve opens second valve port, and gas is introduced into second chamber and exhausts to second gas port.

[0012] Further, the first one-way valve comprises a first one-way valve core and a first spring, the first spring is in abutting cooperation with the first one-way valve core, and the first spring makes the first one-way valve core always have a movement tendency of sealing the first valve port.

[0013] Further, the second one-way valve comprises a second one-way valve core and a second spring, the second spring is in abutting cooperation with the second one-way valve core, and the second spring makes the second one-way valve core always have a movement tendency of sealing the second valve port.

[0014] Further, an outer wall of the second one-way valve core is in sealing cooperation with an inner wall of the second cavity, and a second air channel is arranged through the inside of the second one-way valve core and is in communication with the first valve port.

[0015] The gas exchange device has the advantages that: the valve body has simple internal structure, does not have complex air path design, is convenient for processing and subsequent maintenance work, and has simple structure design, reduces potential fault points, and is stable and reliable in use, and is not prone to faults.

[0016] When the pressure in the gas exchange device is lower than the atmospheric pressure, the gas exchange device starts to inhale, external gas enters the second cavity from the first air channel and the second air port, the gas in the second cavity passes through the first valve port and is pushed away from the first one-way valve under the action of the pressure difference, so that the gas enters the first cavity and inlets the first air port, and the second one-way valve tightly seals the second valve port under the action of the elastic force of the second spring and the pressure of the second cavity.

[0017] Conversely, when the first air port exhausts to the first cavity, so that the pressure in the first cavity is higher than the atmospheric pressure, the first one-way valve tightly seals the first valve port under the action of the elastic force of the first spring and the pressure of the first cavity, the second valve port on both sides of the first valve port is not sealed by the first one-way valve, the gas in the first cavity can pass through the second valve port, and the gas is pushed away from the second one-way valve under the action of the pressure difference, the gas enters the second cavity through the second air channel, and is exhausted outward through the second air port and the first air channel, the gas exchange device can realize both gas inlet and gas outlet, of course, the first one-way valve can be arranged in the valve body without arranging the second one-way valve, so that the gas exchange device can realize gas inlet but cannot realize gas outlet, and of course, the second one-way valve can be arranged in the valve body without arranging the first one-way valve, so that the gas exchange device cannot realize gas inlet but can realize gas outlet. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a sectional structure schematic view of the gas exchange device in the first embodiment;

[0019] Figure 2 is Figure 1An enlarged structural schematic view at A in the middle;

[0020] Figure 3 is a cross-sectional structural schematic view of the ventilation device in the second embodiment;

[0021] Figure 4 is Figure 3 An enlarged structural schematic view at B in the middle;

[0022] Figure 5 is a cross-sectional structural schematic view of the ventilation device in the third embodiment;

[0023] Figure 6 is Figure 5 An enlarged structural schematic view at C in the middle.

[0024] Figures 1-6 In the middle: 1, valve body; 11, first chamber; 111, first spring; 112, first one-way valve core; 1121, tip part; 1122, first step part; 12, second chamber; 121, second spring; 122, second one-way valve core; 1221, second air channel; 1222, third mounting groove; 12221, second sealing ring; 1223, second step part; 13, first valve port; 14, second valve port; 15, piston seat; 151, first air port; 16, second air port; 17, groove; 18, first mounting groove; 181, first sealing ring; 19, second mounting groove; 2, cover plate; 21, convex ring part; 3, first air channel. DETAILED DESCRIPTION

[0025] The utility model will be further explained in connection with the drawings.

[0026] As Figures 1-2As shown, in the first embodiment, the utility model provides a ventilation device, including valve body 1, the upper end cover of valve body 1 is equipped with cover plate 2, the inner wall of cover plate 2 and valve body 1 form first air passage 3, first air passage 3 is linked with the atmosphere, preferably, the cover plate 2 is aluminum cover, be provided with first chamber 11, second chamber 12 and first valve port 13 in valve body 1, first valve port 13 is used to communicate first chamber 11 and second chamber 12, the bottom of valve body 1 is provided with first gas port 151, first gas port 151 is linked with first chamber 11, specifically, first gas port 151 is usually connected with the hydraulic cylinder or hydraulic pump of hydraulic system, the lateral wall of valve body 1 is provided with second gas port 16, second chamber 12 is linked with first air passage 3 through second gas port 16, first chamber 11 is movably provided with first check valve, first check valve and first valve port 13 seal fit, preferably, the first check valve includes first check valve core 112 and first spring 111, the first spring 111 is matched with first check valve core 112, first spring 111 makes first check valve core 112 always have the movement tendency of sealing first valve port 13, when gas enters second chamber 12 from first air passage 3, second gas port 16, first check valve opens first valve port 13, and gas is inhaled into first chamber 11 to first gas port 151, when gas enters first chamber 11, first check valve seals first valve port 13, the internal structure of valve body 1 is simple, does not have complex gas path design, is convenient for processing and subsequent maintenance work, in addition, due to simple structure design, reduces potential failure point, to make ventilation device more stable and reliable in the process of use, and it is not prone to failure problems.

[0027] Preferably, the inner wall of the cover plate 2 is provided with a convex ring portion 21, and the valve body 1 is provided with a groove 17 corresponding to the convex ring portion 21, to ensure that the cover plate 2 and the valve body 1 can be stably and accurately positioned during installation and use.

[0028] Preferably, the first check valve is provided with a pointed end portion 1121 corresponding to the first valve port 13, which can better seal the first valve port 13.

[0029] Preferably, the bottom of the valve body 1 is fixedly provided with a piston seat 15, the first gas port 151 is arranged on the piston seat 15, one end of the first spring 111 abuts against the first check valve core 112, preferably, the first check valve is provided with a first step portion 1122 abutting against the first spring 111, and the other end of the first spring 111 abuts against the piston seat 15, which can better support the first spring 111.

[0030] Preferably, a first sealing ring 181 is sleeved on the outer side wall of the valve body 1, and a first installation groove 18 corresponding to the first sealing ring 181 is arranged on the outer side wall of the valve body 1, so that the first sealing ring 181 can be stably and accurately installed in place, and the first sealing ring 181 is prevented from being undesirably detached.

[0031] Preferably, a second installation groove 19 is arranged in the middle of the outer side wall of the valve body 1, and the second installation groove 19 can be installed with an anti-loss chain to prevent loss after disassembly for later maintenance.

[0032] The working principle of the above-mentioned air exchange device is as follows: when the pressure in the air exchange device is lower than the atmospheric pressure, the air exchange device starts to inhale, and the external gas enters the second chamber 12 from the first airway 3 and the second air port 16. The gas in the second chamber 12 passes through the first valve port 13, and under the action of the pressure difference, the gas pushes open the first one-way valve, so that the gas enters the first chamber 11 and enters the first air port 151.

[0033] Conversely, when the first air port 151 discharges to the first chamber 11, so that the pressure in the first chamber 11 is higher than the atmospheric pressure, the first one-way valve tightly seals the first valve port 13 under the elastic force of the first spring 111 and the gas pressure of the first chamber 11.

[0034] As Figures 3-4In the second embodiment, the utility model also provides a ventilation device, including valve body 1, the upper end cover of valve body 1 is equipped with cover plate 2, the inside wall of cover plate 2 and valve body 1 form first air passage 3, first air passage 3 is linked with the outside atmosphere, preferably, the cover plate 2 is aluminum cover, be provided with first chamber 11, second chamber 12 and second valve port 14 in valve body 1, second valve port 14 is used to communicate first chamber 11 and second chamber 12, the bottom of valve body 1 is provided with first gas port 151, first gas port 151 is linked with first chamber 11, specifically, first gas port 151 is usually connected with the hydraulic cylinder or hydraulic pump of hydraulic system, the lateral wall of valve body 1 is provided with second gas port 16, second chamber 12 is linked with first air passage 3 through second gas port 16, the second chamber 12 is movably provided with second check valve, second check valve and second valve port 14 sealingly cooperate, preferably, the second check valve includes second check valve core 122 and second spring 121, the second spring 121 and second check valve core 122 are matched, and the second spring 121 makes second check valve core 122 always have sealing second valve port 14 movement tendency, when gas enters second chamber 12 from first air passage 3, second gas port 16, second check valve seals second valve port 14, when gas enters first chamber 11 from first gas port 151, second check valve opens second valve port 14, and gas is discharged into second chamber 12 to second gas port 16, the internal structure of valve body 1 is simple, does not have complex gas path design, is convenient for processing and subsequent maintenance work, in addition, due to simple structure design, reduces potential failure point, to make ventilation device more stable and reliable in the use process, and is not prone to failure problem.

[0035] Preferably, the outer wall of the second check valve core 122 is sealingly matched with the inner wall of the second chamber 12, and the second gas passage 1221 is provided in the second check valve core 122.

[0036] The second check valve core 122 is provided with a second sealing ring 12221 on the outer side wall, the second sealing ring 12221 is sealingly matched with the inner wall of the second chamber 12, and the second check valve core 122 is provided with a third mounting groove 1222 corresponding to the second sealing ring 12221, so that the second sealing ring 12221 can be stably and accurately installed in place, and the second sealing ring 12221 is prevented from being undesirably detached.

[0037] Preferably, the inner side wall of the cover plate 2 is provided with a convex ring portion 21, and the valve body 1 is provided with a groove 17 corresponding to the convex ring portion 21, so that the cover plate 2 and the valve body 1 can be stably and accurately positioned during installation and use, and the outer side wall of the valve body 1 is provided with a first limiting step corresponding to the cover plate 2.

[0038] Preferably, the bottom of the valve body 1 is fixedly provided with a piston seat 15, and the first air port 151 is arranged on the piston seat 15.

[0039] Preferably, the outer side wall of the valve body 1 is sleeved with a first sealing ring 181, and the outer side wall of the valve body 1 is provided with a first installation groove 18 corresponding to the first sealing ring 181, so that the first sealing ring 181 can be stably and accurately installed in place, and the first sealing ring 181 is prevented from being undesirably detached.

[0040] Preferably, the middle part of the outer side wall of the valve body 1 is provided with a second installation groove 19, and the second installation groove 19 can be installed with an anti-lost chain to prevent loss after disassembly for later maintenance.

[0041] The working principle of the above-mentioned air exchange device is as follows: when the pressure in the air exchange device is lower than the atmospheric pressure, the air exchange device starts to inhale, and the external gas enters the second chamber 12 from the first air channel 3 and the second air port 16, and the second one-way valve is tightly sealed with the second valve port 14 under the elastic force of the second spring 121 and the gas pressure of the second chamber 12.

[0042] Conversely, when the first air port 151 exhausts to the first chamber 11, so that the pressure in the first chamber 11 is higher than the atmospheric pressure, the gas in the first chamber 11 passes through the second valve port 14, and under the action of the gas pressure difference, the gas pushes open the second one-way valve, and the gas enters the second chamber 12 through the second air channel 1221, and is exhausted to the outside through the second air port 16 and the first air channel 3.

[0043] It should be noted that the air exchange device in the first embodiment is usually used in combination with the air exchange device in the second embodiment, so that the air intake demand and the exhaust demand can be met.

[0044] As Figures 5-6As shown, in the third embodiment, the utility model also provides a kind of ventilation device, including valve body 1, the upper end cover of the valve body 1 is equipped with cover plate 2, first air passage 3 is formed between the inside wall of cover plate 2 and valve body 1, first air passage 3 is connected with ambient atmosphere, preferably, the cover plate 2 is aluminum cover, first chamber 11, second chamber 12, first valve port 13 and second valve port 14 are provided in the valve body 1, and first valve port 13 and second valve port 14 are connected with first chamber 11 and second chamber 12, preferably, in the embodiment, the second valve port 14 is provided on the two sides of the first valve port 13, the bottom of the valve body 1 is provided with first air port 151, and first air port 151 is communicated with first chamber 11, specifically, first air port 151 is usually connected with the hydraulic cylinder or hydraulic pump of hydraulic system, the side wall of valve body 1 is provided with second air port 16, and second chamber 12 is communicated with first air passage 3 by second air port 16, first one-way valve is movably arranged in the first chamber 11, and first one-way valve is sealingly matched with first valve port 13, and first one-way valve is sealingly matched with first valve port 13, preferably, the first one-way valve includes first one-way valve core 112 and first spring 111, the first spring 111 is abuttingly matched with first one-way valve core 112, and first spring 111 makes first one-way valve core 112 always have the movement tendency of sealing first valve port 13, second one-way valve is movably arranged in the second chamber 12, and second one-way valve is sealingly matched with second valve port 14, preferably, the second one-way valve includes second one-way valve core 122 and second spring 121, the second spring 121 is abuttingly matched with second one-way valve core 122, and second spring 121 makes second one-way valve core 122 always have the movement tendency of sealing second valve port 14, preferably, the outer wall of the second one-way valve core 122 is sealingly matched with the inner wall of the second chamber 12, and the second air passage 1221 is arranged in the second one-way valve core 122, and the second air passage 1221 is communicated with first valve port 13.When gas enters second chamber 12 from first air passage 3 and second air port 16, first one-way valve opens first valve port 13, and second one-way valve seals second valve port 14, and gas is introduced into first chamber 11 to first air port 151, when gas enters first chamber 11 from first air port 151, first one-way valve seals first valve port 13, and second one-way valve opens second valve port 14, and gas is introduced into second chamber 12 to second air port 16, the internal structure of valve body 1 is simple, without complex air path design, easy to process and subsequent maintenance work, in addition, due to simple structure design, potential failure point is reduced, so that ventilation device is more stable and reliable in use process, and failure problem is not prone to appear.

[0045] The outer side wall of the second one-way valve core 122 is sleeved with a second sealing ring 12221 which is in sealing cooperation with the inner wall of the second chamber 12. The outer side wall of the second one-way valve core 122 is provided with a third installation groove 1222 corresponding to the second sealing ring 12221, so that the second sealing ring 12221 can be stably and accurately installed in place, and the second sealing ring 12221 is prevented from being undesirably detached.

[0046] Preferably, the inner side wall of the cover plate 2 is provided with a convex ring part 21, and the valve body 1 is provided with a groove 17 corresponding to the convex ring part 21, so that the cover plate 2 and the valve body 1 can be stably and accurately positioned during installation and use. Preferably, the outer side wall of the valve body 1 is provided with a first limiting step corresponding to the cover plate 2.

[0047] Preferably, the bottom of the valve body 1 is fixedly provided with a piston seat 15, the first gas port 151 is arranged on the piston seat 15, one end of the first spring 111 abuts against the first one-way valve core 112, and the first one-way valve is provided with a first step part 1122 abutting against the first spring 111. The other end of the first spring 111 abuts against the piston seat 15, so that the first spring 111 can be better supported.

[0048] Preferably, the second one-way valve is provided with a second step part 1223 corresponding to the second spring 121, one end of the second spring 121 abuts against the second step part 1223, and the other end of the second spring 121 abuts against the cover plate 2. The design of the second step part 1223 can better support the second spring 121.

[0049] Preferably, the outer side wall of the valve body 1 is sleeved with a first sealing ring 181, and the outer side wall of the valve body 1 is provided with a first installation groove 18 corresponding to the first sealing ring 181, so that the first sealing ring 181 can be stably and accurately installed in place, and the first sealing ring 181 is prevented from being undesirably detached.

[0050] Preferably, the outer side wall of the valve body 1 is provided with a second installation groove 19 in the middle, and the second installation groove 19 can be installed with an anti-loss chain to prevent loss after disassembly for later maintenance.

[0051] The working principle of the above-mentioned air exchange device is as follows: when the pressure in the air exchange device is lower than the atmospheric pressure, the air exchange device starts to inhale, and the external gas enters the second chamber 12 from the first gas channel 3 and the second gas port 16. The gas in the second chamber 12 passes through the first valve port 13, and under the action of the pressure difference, the gas pushes open the first one-way valve, so that the gas enters the first chamber 11 and enters the first gas port 151. The second one-way valve is tightly sealed to the second valve port 14 under the elastic force of the second spring 121 and the gas pressure of the second chamber 12.

[0052] Conversely, when the first gas port 151 exhausts to the first chamber 11, so that the pressure in the first chamber 11 is higher than the atmospheric pressure, the first one-way valve is tightly sealed under the elastic force of the first spring 111 and the gas pressure of the first chamber 11 The second valve port 14 on both sides of the first valve port 13 is not sealed by the first one-way valve, and the gas in the first chamber 11 can pass through the second valve port 14. Under the action of the pressure difference, the gas will push open the second one-way valve, the gas enters the second chamber 12 through the second gas channel 1221, and is exhausted outward through the second gas port 16 and the first gas channel 3.

[0053] The above only describes the preferred embodiments of the present application, so equivalent changes or modifications made according to the structure, features and principles described in the patent application range of the present application are included in the patent application range of the present application.

Claims

1. A breather device comprising a valve body (1), the upper end cover of which is provided with a cover plate (2), characterized in that: The inner side wall of the cover plate (2) and the valve body (1) form a first air channel (3), the valve body (1) is provided with a first chamber (11), a second chamber (12) and a first valve port (13) therein, the first valve port (13) is used for connecting the first chamber (11) and the second chamber (12), the bottom of the valve body (1) is provided with a first air port (151), the first air port (151) is connected with the first chamber (11), the side wall of the valve body (1) is provided with a second air port (16), the second chamber (12) is connected with the first air channel (3) through the second air port (16), a first one-way valve is movably arranged in the first chamber (11), the first one-way valve is in sealing cooperation with the first valve port (13), when the gas enters the second chamber (12) from the first air channel (3) and the second air port (16), the first one-way valve opens the first valve port (13), and the gas is introduced into the first chamber (11) to enter the first air port (151), when the gas enters the first chamber (11) from the first air port (151), the first one-way valve seals the first valve port (13).

2. A ventilation device according to claim 1, characterised in that: The first one-way valve comprises a first one-way valve core (112) and a first spring (111), the first spring (111) is in abutting cooperation with the first one-way valve core (112), and the first spring (111) makes the first one-way valve core (112) always have a movement tendency of sealing the first valve port (13).

3. A gas exchange device according to claim 2, wherein: The bottom of the valve body (1) is fixedly provided with a piston seat (15), the first air port (151) is arranged on the piston seat (15), one end of the first spring (111) is in abutment with the first one-way valve core (112), and the other end of the first spring (111) is in abutment with the piston seat (15).

4. A breather device comprising a valve body (1), the upper end cover of which is provided with a cover plate (2), characterized in that: The inner side wall of the cover plate (2) and the valve body (1) form a first air channel (3), the valve body (1) is provided with a first chamber (11), a second chamber (12) and a second valve port (14) therein, the second valve port (14) is used for connecting the first chamber (11) and the second chamber (12), the bottom of the valve body (1) is provided with a first air port (151), the first air port (151) is connected with the first chamber (11), the side wall of the valve body (1) is provided with a second air port (16), the second chamber (12) is connected with the first air channel (3) through the second air port (16), a second one-way valve is movably arranged in the second chamber (12), the second one-way valve is in sealing cooperation with the second valve port (14), when the gas enters the second chamber (12) from the first air channel (3) and the second air port (16), the second one-way valve seals the second valve port (14), when the gas enters the first chamber (11) from the first air port (151), the second one-way valve opens the second valve port (14), and the gas is introduced into the second chamber (12) to exhaust to the second air port (16).

5. A gas exchanger according to claim 4, wherein: The second one-way valve comprises a second one-way valve core (122) and a second spring (121), the second spring (121) is in abutting cooperation with the second one-way valve core (122), and the second spring (121) makes the second one-way valve core (122) always have a movement tendency of sealing the second valve port (14).

6. A gas exchanger according to claim 4, wherein: The inner side wall of the cover plate (2) is provided with a convex ring part (21), and the valve body (1) is provided with a groove (17) corresponding to the convex ring part (21).

7. A breather device comprising a valve body (1), the upper end cover of which is provided with a cover plate (2), characterized in that: The inner side wall of the cover plate (2) and the valve body (1) form a first air channel (3), the valve body (1) is provided with a first chamber (11), a second chamber (12), a first valve port (13) and a second valve port (14), the first valve port (13) and the second valve port (14) are in communication with the first chamber (11) and the second chamber (12), the bottom of the valve body (1) is provided with a first air port (151), the first air port (151) is in communication with the first chamber (11), the side wall of the valve body (1) is provided with a second air port (16), the second chamber (12) is in communication with the first air channel (3) through the second air port (16), a first one-way valve is movably arranged in the first chamber (11), the first one-way valve is in sealing cooperation with the first valve port (13), a second one-way valve is movably arranged in the second chamber (12), the second one-way valve is in sealing cooperation with the second valve port (14), when gas enters the second chamber (12) from the first air channel (3) and the second air port (16), the first one-way valve opens the first valve port (13), and the second one-way valve seals the second valve port (14), the gas is introduced into the first chamber (11) to enter the first air port (151), when the gas enters the first chamber (11) from the first air port (151), the first one-way valve seals the first valve port (13), the second one-way valve opens the second valve port (14), and the gas is introduced into the second chamber (12) to exhaust to the second air port (16).

8. A gas exchange device according to claim 7, characterised in that: The second one-way valve comprises a second one-way valve core (122) and a second spring (121), the second spring (121) is in abutting cooperation with the second one-way valve core (122), and the second spring (121) makes the second one-way valve core (122) always have a movement tendency of sealing the second valve port (14).

9. A gas exchanger according to claim 7, wherein: The second one-way valve comprises a second one-way valve core (122) and a second spring (121), the second spring (121) is in abutting cooperation with the second one-way valve core (122), and the second spring (121) makes the second one-way valve core (122) always have a movement tendency of sealing the second valve port (14).

10. A gas exchange device according to claim 9, wherein: The outer wall of the second one-way valve core (122) is in sealing cooperation with the inner wall of the second chamber (12), and a second air channel (1221) is arranged through the inside of the second one-way valve core (122), and the second air channel (1221) is in communication with the first valve port (13).

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