CN217713675U - Air flow control valve - Google Patents

Abstract

The utility model discloses an air flow control valve, include: the main passage is internally provided with a first butterfly valve to divide the main passage into a first cavity and a second cavity; the bypass passage is internally provided with a second butterfly valve to divide the bypass passage into a third chamber and a fourth chamber; the first butterfly valve and the second butterfly valve are connected through a rotating shaft so as to be capable of rotating simultaneously, the air flow control valve is switched between different states, in the first state, the first cavity is communicated with the second cavity, and the third cavity is not communicated with the fourth cavity; in a second state, the first chamber is not communicated with the second chamber, and the third chamber is communicated with the fourth chamber; in the third state, the first and second chambers, the third and fourth chambers, and the first and third chambers are all in communication. The utility model discloses a respectively be equipped with a butterfly valve in main entrance and by-pass, control the intercommunication of main entrance, by-pass or close respectively, adjust the air mass flow of main entrance, by-pass in order to satisfy the user demand that the user is different.

Description

Air flow control valve

Technical Field

The utility model relates to a control valve equipment technical field, in particular to air flow control valve.

Background

With the rapid development of new energy vehicles, fuel cells are also entering a rapid phase. In the working process of the fuel cell, air enters the fuel cell stack to undergo chemical reaction after passing through the filter, the compressor and the humidifier. The air compressor is an important part of a cathode air supply system of a fuel cell for a vehicle, and can improve the power density and efficiency of the fuel cell, reduce the size of the fuel cell system, and provide clean air with required pressure and flow rate for the fuel cell according to the output power of a stack by pressurizing stack-entering air. In order to ensure the air pressure and flow rate provided by the air compressor to the fuel cell, a control valve for controlling the air pressure and flow rate of the air entering the fuel cell is usually arranged on a pipeline connecting the air compressor and the fuel cell.

In actual work, at least one of the following problems exists: the opening and closing state of a passage in the existing control valve is single, the air flow cannot be flexibly adjusted, and the diversified requirements of users cannot be met.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an air flow control valve includes: the main passage is internally provided with a first butterfly valve, and the first butterfly valve divides the main passage into a first cavity and a second cavity; the bypass passage is internally provided with a second butterfly valve which divides the bypass passage into a third chamber and a fourth chamber; the first butterfly valve and the second butterfly valve are mutually connected through a rotating shaft, so that the first butterfly valve and the second butterfly valve can rotate simultaneously, the air flow control valve is switched between different states,

in the first state, the first chamber is communicated with the second chamber, and the third chamber is not communicated with the fourth chamber;

in the second state, the first chamber is not communicated with the second chamber, and the third chamber is communicated with the fourth chamber;

in the third state, the first chamber is communicated with the second chamber, the third chamber is communicated with the fourth chamber, and the first chamber is communicated with the third chamber.

By adopting the technical scheme, the main channel and the bypass channel are respectively provided with one control valve, so that the air flow control valve can be switched among three states (a first state, a second state and a third state), namely the main channel is communicated and the bypass channel is closed in the first state, and air circulates in the main channel; in the second state, the main passage is closed and the bypass passage is communicated, so that air can circulate in the bypass passage; in the third state, the main passage is communicated with the bypass passage, and the main passage is also communicated with the bypass passage, so that the air in the main passage can be distributed with the air in the bypass passage according to a certain proportion, the diversified requirements of users are met, and the problems that the butterfly valve in the existing air flow control valve only can realize passage switching and cannot adjust the air flow in the main passage and the bypass passage are solved.

Optionally, the air flow control valve is switched from the first state to the second state, the first butterfly valve and the second butterfly valve are rotated by 90 degrees; the air flow control valve is switched from the first state or the second state to the third state, and the rotation angles of the first butterfly valve and the second butterfly valve are greater than 0 degree and less than 90 degrees.

Optionally, the rotary shaft comprises a main rotary shaft and a secondary rotary shaft, the main rotary shaft and the secondary rotary shaft are connected with each other, the main rotary shaft is arranged in the main passage, the main rotary shaft extends along the radial direction of the main passage, and the first butterfly valve is arranged on the axis of the main rotary shaft; the secondary butterfly valve is disposed in the bypass passage from the rotary shaft and extends in a radial direction of the bypass passage from the rotary shaft, and the secondary butterfly valve is disposed on an axis of the secondary rotary shaft.

By adopting the technical scheme, the main rotating shaft and the auxiliary rotating shaft can rotate simultaneously, the first butterfly valve and the second butterfly valve can rotate along with the rotation of the main rotating shaft and the auxiliary rotating shaft, and the rotation angles of the first butterfly valve and the second butterfly valve can control the air flow in the main passage and the bypass passage and the communication or the closing of the main passage and the bypass passage; on the other hand, the first butterfly valve and the second butterfly valve are respectively arranged on the axes of the main rotating shaft and the auxiliary rotating shaft, so that the rotating resistance of the first butterfly valve and the second butterfly valve is reduced.

Optionally, the main passage and the bypass passage are perpendicular to each other, and the main rotating shaft and the secondary rotating shaft extend in the same direction.

Optionally, the air flow control valve further comprises a driving unit connected to the main rotating shaft for driving the main rotating shaft to rotate.

Optionally, the air flow control valve further includes a cooling system for dissipating heat and cooling the driving unit, the cooling system includes a cooling pipe, the cooling pipe is disposed at a position corresponding to the driving unit on one side of the main passage, and the cooling pipe is connected to the housing of the main passage.

By adopting the technical scheme, the cooling pipeline can cool the driving unit by heat dissipation, so that the working performance of the driving unit is improved.

Alternatively, the housing of the main passage and the housing of the bypass passage may withstand high temperatures in the range of 190 ℃ to 230 ℃.

By adopting the technical scheme, the air flow control valve is made of high-temperature-resistant materials to form the shell, so that the applicable temperature range of the air flow control valve is enlarged, and the practicability and the applicability are improved.

Optionally, the inner side walls of the main passage and the bypass passage are circumferentially provided with a seal assembly.

By adopting the technical scheme, the sealing assembly can prevent air leakage of the main passage and the bypass passage.

Optionally, the seal assembly includes a spring retainer and a seal ring, the spring retainer is circumferentially disposed along an inner wall of the main passage and an inner wall of the bypass passage, and the seal ring is circumferentially disposed along an inner side of the spring retainer, such that the seal ring is pressed against the inner wall of the housing of the main passage and the inner wall of the housing of the bypass passage by the spring retainer.

Optionally, the main passage is detachably connected to the bypass passage.

By adopting the technical scheme, in order to meet the requirement of air flow in the air flow control valve, the main passage can be assembled with the bypass passages with different diameters so as to change the threshold value of the air flow control valve by adjusting the runoff.

Optionally, a seal is arranged at the joint of the main passage and the bypass passage.

By adopting the technical scheme, the main channel and the bypass channel have good tightness.

Drawings

Fig. 1 shows a first perspective view of an air flow control valve in an embodiment of the invention;

fig. 2 shows a cross-sectional view of an air flow control valve in an embodiment of the invention;

figure 3 shows a second cross-sectional view of an air flow control valve in an embodiment of the invention;

figure 4 shows a third cross-sectional view of an air flow control valve in an embodiment of the invention;

figure 5 shows a second perspective view of an air flow control valve in an embodiment of the present invention;

fig. 6 shows a perspective view of a rotary shaft and butterfly valve assembly in an embodiment of the invention;

fig. 7 shows an exploded view of an air flow control valve in an embodiment of the invention;

fig. 8 shows a perspective view of a seal assembly in an embodiment of the invention.

In the drawings, the names of the parts corresponding to the reference numerals are as follows:

1-air flow control valve, 11-main channel, 111-first chamber, 112-second chamber, 113-main channel air inlet, 114-main channel air outlet, 115-main channel housing, 12-butterfly valve, 121-first butterfly valve, 122-second butterfly valve, 13-bypass channel, 131-third chamber, 132-fourth chamber, 133-bypass channel air inlet, 134-bypass channel air outlet, 135-bypass channel housing, 136-bypass channel end cap, 15-rotation axis, 151-main rotation axis, 152-slave rotation axis, 16-drive unit, 161-motor, 162-first gear, 163-magnet, 164-second gear, 17-housing cover, 18-cooling channel, 181-water inlet tube, 182-water outlet tube, 19-seal assembly, 191-spring retainer, 192-seal ring, 201-housing cover screw, 202-rotation axis screw, Q-rotation axis₁Main path flow direction, Q₂-direction of bypass flow, R₁Radial direction of the main passage, R₂Radial direction of the bypass path, L₁-direction of extension of the main passage, L₂-direction of extension of the bypass passage, OO '-axis of the main rotation shaft, C-circumferential direction, direction of rotation of the X-butterfly valve, AA' -first, BB '-second, CC' -third, a-first butterfly valve in a first stateThe position of the first butterfly valve in the second state, b-the position of the first butterfly valve in the second state, and c-the position of the first butterfly valve in the third state.

Detailed Description

The following description is given for illustrative embodiments of the invention, and other advantages and effects of the invention will be apparent to those skilled in the art from the disclosure of the present invention. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments. On the contrary, the intention of implementing the novel features described in connection with the embodiments is to cover other alternatives or modifications which may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Furthermore, some of the specific details are omitted from the description so as not to obscure or obscure the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element to which the present invention is directed must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

To make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1, the present invention provides an air flow control valve 1, comprising: a main passage 11 and a bypass passage 13, wherein the diameter of the main passage 11 is larger than the diameter of the bypass passage 13; the main passage 11 has both the inlet 113 and the outlet 114 open at both ends, the bypass passage 13 has one end open as an outlet 134 and the other end closed by an end cap 136, and the housing 115 of the main passage 11 connected to the housing 135 of the bypass passage 13 is provided with an inlet 133 (shown in fig. 5) open as a bypass passage.

FIG. 2 is a first cross-sectional view of FIG. 1 taken along line two (shown as line BB' in FIG. 1). Referring to fig. 2, a first butterfly valve 121 is provided in the main passage 11, and the first butterfly valve 121 divides the main passage 11 into a first chamber 111 and a second chamber 112.

Fig. 3 is a third sectional view taken along a third sectional line (a third sectional line CC' shown in fig. 1), and fig. 3 shows a sectional view of the bypass passage 13. Referring to fig. 2 and 3, a second butterfly valve 122 is provided in the bypass passage 13, and the second butterfly valve 122 divides the bypass passage 13 into a third chamber 131 and a fourth chamber 132.

The first butterfly valve 121 and the second butterfly valve 122 are connected to each other by a rotation shaft 15 so that the first butterfly valve 121 and the second butterfly valve 121 can rotate simultaneously, and the air flow control valve 1 is switched between different states (a first state, a second state, and a third state):

FIG. 4 is a second cross-sectional view of FIG. 1 taken along section line one (shown in FIG. 1 as section line AA'). Fig. 4 shows the positional relationship between the first butterfly valve 121 and the main passage 11 in different states, and in the present application, the positional relationship between the first butterfly valve 121 and the main passage 11 in different states is also applicable to the positional relationship between the second butterfly valve 122 and the bypass passage 13 in different states, which is not shown here.

Referring to fig. 2, in the first state, the first chamber 111 and the second chamber 112 are in communication, and the third chamber 131 and the fourth chamber 132 are not in communication.

Specifically, referring to fig. 4, in the first state, the first butterfly valve 121 is located at the position a, and the extending direction of the first butterfly valve 121 and the extending direction of the main passage 11 (L shown in fig. 4)₁Direction) are the same so that the first chamber 111 and the second chamber 112 communicate, i.e., the main passage 11 communicates. Referring to fig. 2 and 4, q₁The main passageway air flow direction is shown, i.e. air entering through the main passageway air inlet 113 flows through the first chamber 111, the second chamber 112 in sequence, and exits through the main passageway air outlet 114. Referring to fig. 2 and 3, in the first state, the second butterfly valve 122 is in the b position, and the extending direction of the second butterfly valve 122 is in the radial direction (R shown in fig. 1) of the bypass passage 13₂Direction) of the bypass passage 13, and the extending direction (L shown in fig. 1) of the bypass passage 13₂Direction) is vertical, the third chamber 131 and the fourth chamber 132 do not communicate, i.e., the bypass passage 13 does not communicate.

In the second state, the first chamber 111 and the second chamber 112 are not communicated, and the third chamber 131 and the fourth chamber 132 are communicated.

Specifically, referring to fig. 4, in the second state, the first butterfly valve 121 is located at the b position, and the extending direction of the first butterfly valve 121 is in the radial direction of the main passage 11 (R shown in fig. 2)₁Direction) and the extending direction L of the main passage 11₁Vertically, the first chamber 111 and the second chamber 112 do not communicate, i.e. the main passage 11 does not communicate. Meanwhile, referring to fig. 3, in the second state, the second butterfly valve 122 is in the a position, and the extending direction of the second butterfly valve 122 and the extending direction L of the bypass passage 13 are in the same direction₂Similarly, the third chamber 131 and the fourth chamber 132 are communicated, that is, the bypass passage 13 is communicated. Referring to FIGS. 3 and 5, Q₂The bypass flow direction is shown, i.e. air entering through the bypass inlet 133 flows through the third chamber 131, the fourth chamber 132, and so onAnd a bypass outlet 134.

In the third state, the first chamber 111 communicates with the second chamber 112, the third chamber 131 communicates with the fourth chamber 132, and the first chamber 111 communicates with the third chamber 131.

Specifically, referring to fig. 4, in the third state, the first butterfly valve 121 is located at the c position, that is, the position of the first butterfly valve 121 is located at any position between the position a of the first butterfly valve 121 in the first state and the position b of the first butterfly valve 121 in the second state, so that the first chamber 111 and the second chamber 112 are communicated, that is, the main passage 11 is communicated; similarly, referring to fig. 3, in the first state, the second butterfly valve 122 is located at the a position, in the second state, the second butterfly valve 122 is located at the b position, and in the third state, the position c where the second butterfly valve 122 is located at any position between the two, so that the third chamber 131 and the fourth chamber 132 are communicated, that is, the bypass passage 13 is communicated; in addition, the first chamber 111 and the third chamber 131 are communicated through the bypass inlet 133, so that after the air enters from the main passage inlet 113, a part of the air flows through the first chamber 111 and the second chamber of the main passage 11 and is discharged from the main passage outlet 114; a part of the exhaust gas enters the bypass passage 13 through the bypass inlet 133, passes through the third chamber 131 and the fourth chamber 132 in sequence, and is discharged through the bypass outlet 134.

In the present embodiment, the air flow control valve 1 is applied to an air management system of a fuel cell. Illustratively, when the fuel cell stack needs to enter a large amount of air to react, the air flow control valve 1 is in a first state, i.e. the first butterfly valve 121 in the main passage 11 is in a position (as shown in fig. 2 and 4), the second butterfly valve 122 in the bypass passage 13 is in a position (as shown in fig. 3), so that the main passage 11 is communicated, and the bypass passage 13 is not communicated, so that all the air enters the fuel cell stack; when the fuel cell stops working and no longer needs a large amount of air, the air flow control valve 1 is in the second state, that is, the first butterfly valve 121 in the main passage 11 is in the c position (as shown in fig. 4), the second butterfly valve 122 in the bypass passage 13 is in the a position (as shown in fig. 3), so that the main passage 11 is not communicated, and the bypass passage 13 is communicated, so that the redundant air can be discharged from the bypass passage 13; referring to fig. 3 and 4, when it is necessary to partially adjust the amount of intake air in the main passage 11, the airflow control valve 1 is placed in the third state, that is, the first butterfly valve 121 in the main passage 11 and the second butterfly valve 122 in the bypass passage 13 are both in the b position, so that the main passage 11 and the bypass passage 13 are both communicated, and the flow rates of the air in the two passages are in a proportional distribution relationship.

Referring to fig. 4, when the air flow control valve 1 is switched between the first state and the second state, the rotation angles of the first butterfly valve 121 and the second butterfly valve 122 are 90 degrees; when the air flow control valve 1 is switched between the first state or the second state and the third state, the rotation angles of the first butterfly valve 121 and the second butterfly valve 122 are greater than 0 degree and less than 90 degrees.

Specifically, in the present embodiment, when the air flow control valve 1 is switched between the first state and the second state, for example, when the air flow control valve 1 is switched from the first state to the second state, the first butterfly valve 121 is rotated 90 degrees in the rotational direction (X direction as shown in fig. 4) from the a position to the c position, so that the main passage 11 is switched from the communicating state to the non-communicating state. Accordingly, referring to fig. 4, the second butterfly valve 122 is rotated 90 degrees in the rotation direction X from the c position to the a position in the bypass passage 13, so that the bypass passage 13 is switched from the non-communicated state to the communicated state.

In the present embodiment, when the air flow control valve 1 is switched between the first state or the second state and the third state, for example, when the air flow control valve 1 is switched from the first state to the third state, the first butterfly valve 121 is rotated 45 degrees in the rotation direction X from the a position to the b position, so that the main passage 11 is switched from the fully open state to the half open state, and the flow rate of the main passage 11 is changed from 1 to 1/2. Meanwhile, the second butterfly valve 122 rotates 45 degrees from the c position to the b position in the rotation direction X, so that the bypass 13 is switched from the fully closed state to the semi-open state, the flow rate of the bypass 13 is changed from 0 to 1/2, and the effect of reasonably distributing the flow rates in the main passage 11 and the bypass 13 is achieved.

Referring to fig. 2, the rotary shaft 15 includes a master rotary shaft 151 and a slave rotary shaft 152, and the master rotary shaft 151 and the slave rotary shaft 152 are connected to each other. In the present embodiment, the master rotating shaft 151 and the slave rotating shaft 152 are rigidly connected such that the master rotating shaft 151 and the slave rotating shaft 152 can be rotated simultaneously.

Fig. 6 shows the connection and position relationship between the butterfly valve 12 and the rotating shaft 15 in fig. 2: the butterfly valve 12 is detachably connected with the rotating shaft 15 through a screw 202, so that elements can be replaced conveniently; the butterfly valve 12 is arranged on the axis OO 'of the rotary shaft 15, i.e., the line on which the diameter of the butterfly valve 12 is located coincides with the axis OO' of the rotary shaft 15.

Specifically, referring to FIG. 2, the main rotating shaft 151 is disposed within the main passageway 11, the main rotating shaft 151 being axially oriented along a radial direction R of the main passageway₁Extending, the first butterfly valve 121 is arranged on the axis of the main rotating shaft 151; the driven shaft 152 is provided in the bypass passage 13, and the driven shaft 152 extends in the radial direction R of the bypass passage₂And a second butterfly valve 122 is provided on the axis from the rotary shaft.

Compared with the traditional air flow control valve, the butterfly valve is arranged at the junction of the main passage and the bypass passage, and one point of the butterfly valve in the circumferential direction is connected with the junction of the main passage and the bypass passage, so that the butterfly valve controls the switching of the main passage and the bypass passage. In the present embodiment, one butterfly valve 12 is provided in each of the main passage 11 and the bypass passage 13. Referring to fig. 2 and 6, the butterfly valve 12 is provided on the axis OO' of the rotary shaft 15 such that the butterfly valve 12 can be rotated with the rotation of the rotary shaft 15 to adjust the air flow rate in the main passage 11 or the bypass passage 13 as needed, and to control the communication or non-communication of the main passage 11 or the bypass passage 13. On the other hand, providing the butterfly valve 12 on the axis OO' of the rotary shaft 15 also reduces the rotation resistance of the butterfly valve 12.

Referring to fig. 1, 2 and 5, in the present embodiment, the main passage 11 and the bypass passage 13 are perpendicular to each other, and the main rotation shaft 151 and the sub rotation shaft 152 extend in the same direction. The first butterfly valve 121 and the second butterfly valve 122 are respectively provided on both sides of the main rotating shaft 151 and the secondary rotating shaft 152 in the extending direction, and the first butterfly valve 121 and the second butterfly valve 122 form an angle of 90 degrees. When the first butterfly valve 121 and the second butterfly valve 122 are simultaneously rotated with the main rotating shaft 151 and the slave rotating shaft 152, the air flow control valve 1 is enabled to be switched to different states.

Illustratively, referring to fig. 3 and 4, the first butterfly valve 121 is in the a position, the second butterfly valve 122 is in the c position, the main passage 11 is connected, the bypass passage 13 is not connected, and the air flow control valve 1 is in the first state. The first butterfly valve 121 and the second butterfly valve 122 rotate together in the rotation direction X by 90 degrees along with the rotation shaft 15, the first butterfly valve 121 is in the c position, the second butterfly valve 122 is in the a position, the main passage 11 is not communicated, the bypass passage 13 is communicated, and the air flow control valve 1 is in the second state.

In other embodiments of the present application, the main passage 11 is angled with respect to the bypass passage 13, respectively, in the radial direction R of the main passage₁Extended main rotating shaft 151 and radial direction R along bypass path₂Extending at an angle from the axis of rotation 152. Since the butterfly valve 12 is disposed on the axis of the rotating shaft 15, a certain angle is formed between the first butterfly valve 121 and the second butterfly valve 122, and the first butterfly valve 121 and the second butterfly valve 122 can rotate simultaneously with the rotating shaft 15, so that the main passage 11 and the bypass passage 13 are in different states.

For example, referring to fig. 2 to 4, the angle between the main passage 11 and the bypass passage 13 is 60 degrees, and accordingly, the angle between the main rotary shaft 151 and the slave rotary shaft 152 and the angle between the first butterfly valve 121 and the second butterfly valve 122 are also 60 degrees. When the air flow control valve 1 is switched between the first state and the second state, the first butterfly valve 121 and the second butterfly valve 122 rotate 90 degrees in the rotation direction X at the same time; when the air flow control valve 1 is switched between the first state or the second state and the third state, the rotation angle of the first butterfly valve 121 and the second butterfly valve 122 in the rotation direction X is greater than 0 degree and less than 90 degrees. The foregoing has been described in detail and is not repeated here.

Referring to fig. 7, the air flow control valve 1 further includes a driving unit 16, and the driving unit 16 includes a motor 161, a first gear 162, a magnet 163, and a second gear 164. The first gear 162 and the second gear 164 form a two-stage gear transmission with a gear on the motor 161, and the motor 161 is further connected with the main rotating shaft 151, so that the motor 161 can drive the main rotating shaft 151 to rotate.

Referring to fig. 7, the air flow control valve 1 further includes a housing cover 17, and the housing cover 17 is connected to the main passage housing 115 by screws 201 for protecting internal parts.

The housing cover 17 includes a position sensor (not shown) for receiving and feeding back position information of the butterfly valve 12. In this embodiment, since the motor 161 rotates the main rotary shaft 151, the sub-rotary shaft 152 rotates simultaneously with the main rotary shaft 151 due to the rigid connection with the main rotary shaft 151, and the first butterfly valve 121 and the second butterfly valve 122 connected to the main rotary shaft 151 and the sub-rotary shaft 152 rotate together with the same, the rotation angle of the butterfly valve 12 and the rotation angle of the motor 161 have a certain relationship.

The first gear 162 and the second gear 164 can also rotate with the motor 161, and the magnet 163 rotates with the rotation of the first gear 162 and the second gear 164, so that the magnetic field direction changes and different voltage values are generated. Therefore, the change in the magnetic field and the voltage value have a certain relationship with the rotation angle of the motor 161. Further, the change of the magnetic field and the change of the voltage value correspond to the rotation angle of the butterfly valve 12. The position sensor in the housing cover 17 outputs a different voltage value accordingly to the control unit, which (not shown in the figure) determines the angle of rotation and the position of the butterfly valve 12.

Referring to fig. 1 and 7, the air flow control valve 1 further includes a cooling system including a cooling duct 18, the cooling duct 18 being provided at a position corresponding to the driving unit 16 at one side of the main passage 11, the cooling duct 18 being connected to a housing 115 of the main passage. The cooling pipeline 18 includes a water inlet pipe 181 and a water outlet pipe 182, and is used for cooling the driving unit 16 and improving the working performance of the driving unit 16. In other embodiments, the location of the cooling ducts 18 may be designed according to the needs of the user. For example, the cooling duct 18 is provided on one side of the bypass passage 13 to dissipate heat and reduce temperature.

Referring to fig. 5 and 7, the housing 115 of the main passage and the housing 135 of the bypass passage are made of high temperature resistant materials, and the high temperature resistant range is 190 ℃ to 230 ℃, so that the applicable temperature range of the air flow control valve 1 is expanded, and the practicability and applicability are improved. Illustratively, the housing 115 of the main passage and the housing 135 of the bypass passage are made of a teflon material and can withstand a temperature threshold of 205 ℃.

Referring to fig. 1, 4 and 7, the inner side walls of the main passage 11 and the bypass passage 13 are respectively provided with a seal assembly 19 along the circumferential direction, so that air leakage of the main passage 11 and the bypass passage 13 can be prevented, and the sealing performance is good.

Referring to fig. 8, the sealing assembly 19 includes a spring holder 191 and a sealing ring 192, the spring holder 191 is disposed along the circumferential direction of the inner sidewalls of the main passage 11 and the bypass passage 13, and the sealing ring 192 is disposed along the circumferential direction of the spring holder 191 (in the C direction shown in the figure), so that the sealing ring 192 can be pressed against the inner wall of the housing 115 of the main passage or the inner wall of the housing 135 of the bypass passage by the spring holder 191 when the butterfly valve 12 is located at the C position (shown in fig. 4) due to the elasticity of the spring holder 191, thereby achieving a better sealing effect.

On the other hand, around the butterfly valve 12 is a sealing ring 192, because the sealing ring 192 is a soft material that can be compressed or squeezed during use. Even if the air flow control valve 1 is used in a high-temperature environment, the clamping risk of the butterfly valve 12 along with the temperature change is small, and therefore the requirement for adjusting the axial clearance of the butterfly valve 12 is omitted. In the present embodiment, the sealing ring 192 is made of a high temperature resistant material, and the material of the sealing ring 192 is, for example, fluororubber.

Referring to fig. 5 and 7, the main passage 11 is detachably connected to the bypass passage 13. Illustratively, the main passage 11 and the bypass passage 13 are made of a high temperature resistant metal material, such as aluminum alloy, and are connected by a snap fit. For another example, the main passage 11 and the bypass passage 13 are connected by screws. The main channel 11 and the bypass channel 13 are detachably connected, so that a user can replace the bypass channels 13 with different diameters according to requirements, and the path flow of the bypass channels 13 is changed to meet the requirements of different air flows of the air flow control valve 1.

A seal is provided at the junction of the main passage 11 and the bypass passage 13 to prevent air leakage, so that the air flow control valve 1 has good sealing properties.

Use the air flow control valve 1 that this application provided, be equipped with first butterfly valve 121 and second butterfly valve 122 in main passageway 11 and bypass 13 respectively, will originally independent main passageway 11 and bypass 13 combine together, have the effect that integrates.

The air flow control valve described in the above embodiment is applicable to an air management system of a fuel cell, and the applicable scenario of the air flow control valve of the present application is not limited thereto, and for example, the present invention may also be applicable to a throttle valve of an internal combustion engine, and the like.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, and the specific embodiments thereof are not to be considered as limiting. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims (11)

1. An air flow control valve, comprising:

the main passage is internally provided with a first butterfly valve, and the first butterfly valve divides the main passage into a first chamber and a second chamber;

the bypass passage is internally provided with a second butterfly valve which divides the bypass passage into a third chamber and a fourth chamber;

the first butterfly valve and the second butterfly valve are connected with each other through a rotating shaft, so that the first butterfly valve and the second butterfly valve can rotate simultaneously, the air flow control valve is switched between different states,

in a first state, the first chamber is communicated with the second chamber, and the third chamber is not communicated with the fourth chamber;

in a second state, the first chamber is not communicated with the second chamber, and the third chamber is communicated with the fourth chamber;

in a third state, the first chamber is communicated with the second chamber, the third chamber is communicated with the fourth chamber, and the first chamber is communicated with the third chamber.

2. The air flow control valve of claim 1, wherein the first butterfly valve and the second butterfly valve rotate 90 degrees when the air flow control valve is switched between the first state and the second state; when the air flow control valve is switched between the first state or the second state and the third state, the rotation angles of the first butterfly valve and the second butterfly valve are greater than 0 degree and less than 90 degrees.

3. The air flow control valve of claim 1 wherein said rotary shafts include a master rotary shaft and a slave rotary shaft, said master rotary shaft and said slave rotary shaft being interconnected,

the main rotating shaft is arranged in the main passage, the main rotating shaft extends along the radial direction of the main passage, and the first butterfly valve is arranged on the axis of the main rotating shaft;

the secondary rotating shaft is arranged in the bypass passage, the secondary rotating shaft extends along the radial direction of the bypass passage, and the second butterfly valve is arranged on the axis of the secondary rotating shaft.

4. The air flow control valve according to claim 3 wherein said main passage and said bypass passage are perpendicular to each other, and said main rotary shaft and said secondary rotary shaft extend in the same direction.

5. The air flow control valve of claim 4 further comprising a drive unit coupled to said main rotating shaft for driving rotation of said main rotating shaft.

6. The air flow control valve of claim 5, further comprising a cooling system for dissipating heat and cooling said drive unit, said cooling system comprising a cooling duct disposed at a side of said main passageway corresponding to said drive unit, said cooling duct being connected to a housing of said main passageway.

7. The air flow control valve of claim 6, wherein the housing of the main passage and the housing of the bypass passage are capable of withstanding high temperatures in the range of 190 ℃ to 230 ℃.

8. The air flow control valve of claim 3 wherein the inner sidewalls of said main passage and said bypass passage are circumferentially provided with a seal assembly.

9. The air flow control valve of claim 8, wherein said seal assembly includes a spring retainer disposed circumferentially along an inner wall of said main passage and an inner wall of said bypass passage, and a seal ring disposed circumferentially along an inner side of said spring retainer such that said seal ring is compressed against an inner wall of said housing of said main passage and an inner wall of said housing of said bypass passage by said spring retainer.

10. The air flow control valve of claim 1 or 3, wherein said main passage is detachably connected to said bypass passage.

11. The air flow control valve of claim 10 wherein a seal is provided at the junction of said main passage and said bypass passage.

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