Air non-return device of air conditioner ventilation equipment

Abstract

The invention relates to the technical field of ventilation equipment, and discloses an air non-return device of air conditioner ventilation equipment, which comprises a valve body, a sealing valve seat arranged in the valve body and a blowing device arranged at the bottom of the valve body, and further comprises a limiting assembly, the top of the valve body is fixedly connected with a valve cover assembly, and the middle part in the valve body is fixedly connected with a rotating shaft assembly; the other side of the interior of the valve body is fixedly connected with a sealing valve seat, the bottom of the sealing valve seat is fixedly connected with a blowing device, the position, close to the middle, of one side of the interior of the valve body is fixedly connected with a limiting assembly, and the sealing valve seat comprises a valve seat shell, an annular magnet, a coil and a sealing ring; the valve clack falls down, the second spring resets to drive the second switch piece to be connected with the second electric switch, a circuit is connected to enable the coil to be powered on, the magnetic field of the annular magnet is enhanced, the valve clack is accelerated to move towards the sealing valve seat, the falling speed of the valve clack is increased, and backflow air cannot pass through the valve.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilation equipment, and more particularly to an air check valve device for air-conditioning ventilation equipment. Background Art

[0002] Air-conditioning ventilation equipment mainly consists of two major parts: a ventilation system and an air-conditioning system. The ventilation system is responsible for the exchange and circulation of indoor and outdoor air, and the air-conditioning system is responsible for adjusting environmental parameters such as indoor temperature and humidity. Specifically, air-conditioning ventilation equipment may include supply and exhaust fans, air ducts, duct components, mufflers, air handling units, cold and heat sources, and automatic control devices, etc.; the air check valve device of air-conditioning ventilation equipment is usually called an air-conditioning check valve, which is a device that allows air flow to flow in one direction only, and is also called a one-way valve or a non-return valve. An air-conditioning check valve usually consists of components such as a valve body, a valve flap, and a spring. The valve body is the main part of the check valve, and the valve flap is used to open and close the valve. When the air-conditioning system is operating normally, the air flow will push the valve flap open, allowing the fluid to pass through smoothly. When the air-conditioning system stops operating or a reverse flow phenomenon occurs, the valve flap will close to prevent the fluid from flowing back.

[0003] When the existing air check valve device of air-conditioning ventilation equipment is in use, when the air-conditioning system stops operating or a reverse flow phenomenon occurs, the falling speed of the valve flap is a bit slow, and there is still a possibility of air flowing back through the valve. After the valve flap falls, due to the slow falling speed, the seal with the valve seat is not tight enough, and there is a possibility of fluid flowing back; secondly, after the pipeline has been used for a long time, dust may enter the interior. When the air flows back, the dust will also enter the inner bottom groove of the air-conditioning check valve along with the reverse-flowing gas, and the accumulated dust affects the use of the air-conditioning ventilation equipment. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an air check valve device for air-conditioning ventilation equipment to solve the problems existing in the above-mentioned background art.

[0005] The present invention provides the following technical solution: An air check valve device for air-conditioning ventilation equipment, including a valve body and a sealing valve seat installed inside the valve body and a blowing device at its bottom, further including a limiting component. The top of the valve body is fixedly connected with a valve cover component, the middle part inside the valve body is fixedly connected with a rotating shaft component, the other side inside the valve body is fixedly connected with a sealing valve seat, the bottom of the sealing valve seat is fixedly connected with a blowing device, and the limiting component is fixedly connected at a position near the middle on one side inside the valve body; The sealed valve seat includes a valve seat housing, an annular magnet, a coil, and a sealing ring. The structure of the valve seat housing is an inclined annular structure. On the other side inside the valve seat housing, an annular magnet is fixedly connected. In the middle inside the valve seat housing, a coil is movably connected. On one side inside the valve seat housing, a sealing ring is fixedly connected. The annular magnet and the coil, as well as the coil and the sealing ring, are separated by an annular partition; The blowing device includes a first electric switch, electric wires, a first switch member, a first moving rod, a first spring, a motor, and a fan. Electric wires are fixedly connected to both the top and bottom of the first electric switch. Inside the first electric switch, a first switch member is movably connected. The other end of the first switch member is fixedly connected to a first moving rod, and on the other side of the first moving rod, a first spring is fixedly connected; The limiting component includes a limiting block, a second spring, a second moving rod, a second switch member, a second electric switch, a mounting plate, and a fixing bolt. A second spring is provided inside the limiting block. The top end of the second spring is fixedly connected to the limiting block, and the bottom end of the second spring is fixedly connected to a second moving rod. A second switch member is fixedly connected to the side of the second moving rod, and a second electric switch is movably connected to the outside of the second switch member.

[0006] Further, the electric wire at the top of the first electric switch is fixedly connected to the coil. The other side of the first spring is fixedly connected to the valve body. The electric wire at the bottom of the first electric switch is fixedly connected to a motor, and a fan is fixedly connected to the side of the motor.

[0007] Further, on one side at the top of the limiting block, a mounting plate is fixedly connected. On the other side of the mounting plate, a fixing bolt is fixedly connected. On one side of the mounting plate, the valve body is fixedly connected. The second electric switch, the coil, the first electric switch, the electric wires, and the motor are connected in series and electrically connected to the power source.

[0008] Further, the valve body includes a valve body main body, a valve body interface, a sealing gasket, a flange, and a pipeline. At the top of the valve body main body, a valve body interface is fixedly connected. In the middle at the top of the valve body interface, a sealing gasket is movably connected. On both sides of the valve body main body, flanges are fixedly connected, and on the other end of the flanges, pipelines are fixedly connected.

[0009] Further, the valve cover assembly includes a valve cover main body and an annular protrusion. At the bottom of the valve cover main body, an annular protrusion is fixedly connected. At the bottom of the annular protrusion, a sealing gasket is movably connected.

[0010] Further, the rotating shaft assembly includes a fixing member, a first connecting arm, a rotating shaft, a second connecting arm, a first connecting plate, a valve flap, and a second connecting plate. At the bottom of the fixing member, a first connecting arm is fixedly connected. At the bottom of the front surface of the first connecting arm, a rotating shaft is movably connected. On the front surface of the outside of the rotating shaft, a second connecting arm is movably connected.

[0011] Furthermore, a first connecting plate is fixedly connected to the bottom of one side of the second connecting arm, a valve flap is fixedly connected to the other side of the second connecting arm, a magnet is fixedly connected inside the valve flap, and a second connecting plate is fixedly connected to the bottom of the valve flap.

[0012] Technical effects and advantages of the present invention: 1. By providing a limiting component in the present invention, when air passes through the valve, the valve flap moves to contact the limiting block, the first connecting plate causes the second moving rod to move, the second spring is compressed, the second switch member leaves the second electric switch, and the second electric switch is turned off. At this time, the first switch member is in a connected state with the first electric switch, the first electric switch is closed, and the circuit is in a non-powered state; when the air conditioning ventilation system stops operating or a reverse flow phenomenon occurs, the air flow rate decreases, the valve flap leaves the limiting block, the second spring resets to cause the second moving rod to move, driving the second switch member to connect the second electric switch, the circuit is connected to energize the coil, and the current direction in the coil is consistent with the magnetic field direction of the annular magnet, the magnetic field is enhanced, and the valve flap quickly moves towards the sealing valve seat, which is beneficial to accelerating the falling speed of the valve flap, so that the reverse-flow air cannot pass through the valve.

[0013] 2. By providing a sealing valve in the present invention, when the valve flap seals with the sealing valve seat, the annular magnet and the valve flap are fixed by magnetic adsorption, which is beneficial to improving the sealing performance of the valve flap and making the seal between the valve flap and the sealing valve seat more tight.

[0014] 3. By providing a blowing device in the present invention, when the valve flap falls and has not yet contacted the sealing valve seat, when the circuit is in a connected state, the energized motor operates to make the fan rotate and blow away the dust, which is beneficial to preventing the dust from being driven and accumulating in the groove when the valve flap falls. Brief Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the structure of the rotating shaft assembly of the present invention.

[0017] Figure 3 It is a schematic sectional view of the sealing valve seat of the present invention.

[0018] Figure 4 It is a schematic diagram of the structure of the blowing device of the present invention.

[0019] Figure 5 It is a schematic diagram of the state of the valve flap when air flows through the present invention.

[0020] Figure 6 It is a schematic sectional view of the limiting component of the present invention.

[0021] The reference numerals are: 1, valve body; 101, valve body main body; 102, valve body interface; 103, gasket; 104, flange; 105, pipeline; 2, valve cover assembly; 201, valve cover main body; 202, annular protrusion; 3, rotating shaft assembly; 301, fixing member; 302, first connecting arm; 303, rotating shaft; 304, second connecting arm; 305, first connecting plate; 306, valve flap; 307, second connecting plate; 4, sealing valve seat; 401, valve seat housing; 402, annular magnet; 403, coil; 404, sealing ring; 5, blowing device; 501, first electric switch; 502, electric wire; 503, first switch member; 504, first moving rod; 505, first spring; 506, motor; 507, fan; 6, limiting assembly; 601, limiting block; 602, second spring; 603, second moving rod; 604, second switch member; 605, second electric switch; 606, mounting plate; 607, fixing bolt. Detailed implementation manners

[0022] The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples, and an air check valve device of an air-conditioning ventilation device involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] Refer to Figures 1-6, the present invention provides an air check valve device for an air conditioning and ventilation equipment. An air check valve device for an air conditioning and ventilation equipment includes a valve body 1, a sealing valve seat 4 installed inside the valve body 1, and a blowing device 5 at its bottom. It also includes a limiting component 6. A valve cover assembly 2 is fixedly connected to the top of the valve body 1. A rotating shaft assembly 3 is fixedly connected to the middle part inside the valve body 1. A sealing valve seat 4 is fixedly connected to the other side inside the valve body 1. A blowing device 5 is fixedly connected to the bottom of the sealing valve seat 4. A limiting component 6 is fixedly connected to a position near the middle on one side inside the valve body 1; when air passes through the valve, the valve flap 306 moves to contact the limiting block 601, the first connecting plate 305 causes the second moving rod 603 to move, the second spring 602 is compressed, and the second switch member 604 leaves the second electric switch 605, causing the second electric switch 605 to disconnect. At this time, the first switch member 503 is in a connected state with the first electric switch 501, causing the first electric switch 501 to close, and the circuit is in a non-powered state. When the air conditioning and ventilation system stops operating or a reverse flow phenomenon occurs, the air flow rate decreases, the valve flap 306 leaves the limiting block 601, the second spring 602 resets to cause the second moving rod 603 to move, driving the second switch member 604 to connect to the second electric switch 605, the circuit is connected to energize the coil 403, the current direction in the coil 403 is the same as the magnetic field direction of the annular magnet 402, the magnetic field is enhanced, and the valve flap 306 quickly moves towards the sealing valve seat 4, which is beneficial to accelerating the falling speed of the valve flap 306, so that the reverse-flow air cannot pass through the valve.

[0024] The sealing valve seat 4 includes a valve seat housing 401, an annular magnet 402, a coil 403, and a sealing ring 404. The structure of the valve seat housing 401 is an inclined annular structure. The annular magnet 402 is fixedly connected to the other side inside the valve seat housing 401. The coil 403 is movably connected to the middle part inside the valve seat housing 401. The sealing ring 404 is fixedly connected to one side inside the valve seat housing 401. The annular magnet 402 and the coil 403, as well as the coil 403 and the sealing ring 404, are separated by an annular partition; when the valve flap 306 seals with the sealing valve seat 4, the annular magnet 402 and the valve flap 306 are fixed and sealed by magnetic adsorption, which is beneficial to improving the sealing performance of the valve flap 306 and making the seal between the valve flap 306 and the sealing valve seat 4 more tight.

[0025] The blowing device 5 includes a first electric switch 501, a wire 502, a first switch member 503, a first moving rod 504, a first spring 505, a motor 506 and a fan 507. Wires 502 are fixedly connected to both the top and bottom of the first electric switch 501. A first switch member 503 is movably connected inside the first electric switch 501. The other end of the first switch member 503 is fixedly connected to a first moving rod 504. A first spring 505 is fixedly connected to the other side of the first moving rod 504. When the valve flap 306 falls and has not yet contacted the sealing valve seat 4, the circuit is in a connected state. The energized motor 506 operates to rotate the fan 507, blowing away dust, which helps prevent dust from being carried and accumulating in the groove when the valve flap 306 falls. The limiting component 6 includes a limiting block 601, a second spring 602, a second moving rod 603, a second switch member 604, a second electric switch 605, a mounting plate 606 and a fixing bolt 607. A second spring 602 is provided inside the limiting block 601. The top end of the second spring 602 is fixedly connected to the limiting block 601, and the bottom end of the second spring 602 is fixedly connected to a second moving rod 603. A second switch member 604 is fixedly connected to the side of the second moving rod 603. The second switch member 604 is movably connected to the outside of the second electric switch 605.

[0026] In a preferred embodiment, the wire 502 at the top of the first electric switch 501 is fixedly connected to the coil 403. The other side of the first spring 505 is fixedly connected to the valve body 1. The wire 502 at the bottom of the first electric switch 501 is fixedly connected to the motor 506, and the fan 507 is fixedly connected to the side of the motor 506.

[0027] In a preferred embodiment, a mounting plate 606 is fixedly connected to one side of the top of the limiting block 601. A fixing bolt 607 is fixedly connected to the other side of the mounting plate 606. The mounting plate 606 is fixedly connected to the valve body 1 on one side. The second electric switch 605, the coil 403, the first electric switch 501, the wire 502 and the motor 506 are connected in series with the power supply electrically. When the valve flap 306 seals with the sealing valve seat 4, the first electric switch 501 disconnects, and the second electric switch 605 closes, and the circuit is not powered. When the valve flap 306 contacts the limiting component 6, the first electric switch 501 closes, and the second electric switch 605 disconnects, and the circuit is not powered.

[0028] In a preferred embodiment, the valve body 1 includes a valve body main body 101, a valve body interface 102, a sealing gasket 103, a flange 104 and a pipe 105. The valve body interface 102 is fixedly connected to the top of the valve body main body 101. A sealing gasket 103 is movably connected to the middle of the top of the valve body interface 102. The flanges 104 are fixedly connected to both sides of the valve body main body 101. The pipe 105 is fixedly connected to the other end of the flange 104. The flange 104 of the valve body 1 and the flange 104 of the pipe 105 are fixed by fastening bolts.

[0029] In a preferred embodiment, the valve cover assembly 2 includes a valve cover body 201 and an annular protrusion 202. The annular protrusion 202 is fixedly connected to the bottom of the valve cover body 201. The bottom of the annular protrusion 202 is movably connected to a gasket 103. By cooperating the gasket 103 with the annular protrusion 202, the sealing performance between the valve cover assembly 2 and the valve body interface 102 is improved.

[0030] In a preferred embodiment, the rotating shaft assembly 3 includes a fixing member 301, a first connecting arm 302, a rotating shaft 303, a second connecting arm 304, a first connecting plate 305, a valve flap 306 and a second connecting plate 307. The bottom of the fixing member 301 is fixedly connected to the first connecting arm 302. The bottom of the front surface of the first connecting arm 302 is movably connected to the rotating shaft 303. The front surface of the outer side of the rotating shaft 303 is movably connected to the second connecting arm 304.

[0031] In a preferred embodiment, a first connecting plate 305 is fixedly connected to the bottom of one side of the second connecting arm 304, and a valve flap 306 is fixedly connected to the other side of the second connecting arm 304. A magnet is fixedly connected inside the valve flap 306, and a second connecting plate 307 is fixedly connected to the bottom of the valve flap 306. When air passes through the valve, the valve flap 306 is pushed up and moves. The second connecting arm 304 rotates relative to the first connecting arm 302 through the rotating shaft 303, and finally the first connecting plate 305 abuts against the limiting block 601.

[0032] The working principle of the present invention: When air passes through the valve, the valve flap 306 moves and contacts the limiting block 601. The valve flap 306 is pushed up and moves. The second connecting arm 304 rotates relative to the first connecting arm 302 through the rotating shaft 303. The first connecting plate 305 abuts against the limiting block 601. The first connecting plate 305 moves the second moving rod 603, compresses the second spring 602, and the second switch member 604 leaves the second electric switch 605, causing the second electric switch 605 to disconnect. At this time, the first switch member 503 is in a connected state with the first electric switch 501, causing the first electric switch 501 to close, and the circuit is in a non-powered state. When the air-conditioning ventilation system stops operating or a reverse flow phenomenon occurs, the air flow rate decreases. The valve flap 306 leaves the limiting block 601. The second spring 602 resets to move the second moving rod 603, driving the second switch member 604 to connect to the second electric switch 605. The circuit is connected to energize the coil 403. The current direction in the coil 403 is consistent with the magnetic field direction of the annular magnet 402, and the magnetic field is enhanced. The valve flap 306 quickly moves towards the sealing valve seat 4, which is beneficial to accelerating the falling speed of the valve flap 306, so that the reverse-flow air cannot pass through the valve. When the valve flap 306 seals with the sealing valve seat 4, the annular magnet 402 and the valve flap 306 are fixedly sealed by magnetic adsorption, which is beneficial to improving the sealing performance of the valve flap 306, making the seal between the valve flap 306 and the sealing valve seat 4 more tight. At the same time, when the valve flap 306 seals, the second connecting plate 307 abuts against the first moving rod 504, the first spring 505 is compressed, and the movement of the first moving rod 504 drives the first switch member 503 away from the first electric switch 501, and the first electric switch 501 is disconnected. When the valve flap 306 falls and has not yet contacted the sealing valve seat 4, the circuit is in a connected state, and the energized motor 506 operates to rotate the fan 507 to blow away the dust, which is beneficial to preventing the dust from being driven and accumulating in the groove when the valve flap 306 falls.

[0033] Finally, the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air check device for air conditioning and ventilation equipment, comprising a valve body (1), a sealing valve seat (4) installed inside the valve body (1), and a blowing device (5) at the bottom thereof, characterized in that: It also comprises a limit assembly (6), the top of the valve body (1) is fixedly connected to a valve cover assembly (2), the middle of the interior of the valve body (1) is fixedly connected to a shaft assembly (3), the other side of the interior of the valve body (1) is fixedly connected to a sealing valve seat (4), the bottom of the sealing valve seat (4) is fixedly connected to a blowing device (5), and one side of the interior of the valve body (1) near the middle is fixedly connected to the limit assembly (6); The sealing valve seat (4) comprises a valve seat shell (401), an annular magnet (402), a coil (403) and a sealing ring (404); the structure of the valve seat shell (401) is an inclined annular structure; the annular magnet (402) is fixedly connected to the other side of the valve seat shell (401); the coil (403) is movably connected to the middle part of the valve seat shell (401); the sealing ring (404) is fixedly connected to one side of the valve seat shell (401); the annular magnet (402) and the coil (403) as well as the coil (403) and the sealing ring (404) are separated by an annular partition; The blowing device (5) comprises a first electric switch (501), an electric wire (502), a first switch member (503), a first moving rod (504), a first spring (505), a motor (506) and a fan (507); the top and bottom of the first electric switch (501) are fixedly connected to the electric wire (502); the first electric switch (501) is movably connected to the first switch member (503) inside; the other end of the first switch member (503) is fixedly connected to the first moving rod (504); and the other side of the first moving rod (504) is fixedly connected to the first spring (505); The limiting assembly (6) comprises a limiting block (601), a second spring (602), a second moving rod (603), a second switch component (604), a second electric switch (605), a mounting plate (606) and a fixing bolt (607); the limiting block (601) is provided with a second spring (602) inside; the top end of the second spring (602) is fixedly connected to the limiting block (601); the bottom end of the second spring (602) is fixedly connected to the second moving rod (603); the side of the second moving rod (603) is fixedly connected to the second switch component (604); and the outer side of the second switch component (604) is movably connected to the second electric switch (605).

2. The air non-return device of the air conditioning and ventilation equipment according to claim 1, characterized in that: The top wire (502) of the first electric switch (501) is fixedly connected to the coil (403), the other side of the first spring (505) is fixedly connected to the valve body (1), the bottom wire (502) of the first electric switch (501) is fixedly connected to the motor (506), and the side of the motor (506) is fixedly connected to the fan (507).

3. The air non-return device of the air conditioning and ventilation equipment according to claim 2, characterized in that: A mounting plate (606) is fixedly connected to one side of the top of the limit block (601), a fixing bolt (607) is fixedly connected to the other side of the mounting plate (606), one side of the mounting plate (606) is fixedly connected to the valve body (1), and the second electric switch (605), the coil (403), the first electric switch (501), the electric wire (502) and the motor (506) are electrically connected in series with a power source.

4. The air non-return device of the air conditioning and ventilation equipment according to claim 1, characterized in that: The valve body (1) comprises a valve body (101), a valve body interface (102), a sealing gasket (103), a flange (104) and a pipe (105); the top of the valve body (101) is fixedly connected to the valve body interface (102); the middle of the top of the valve body interface (102) is movably connected to the sealing gasket (103); the two sides of the valve body (101) are fixedly connected to the flanges (104); and the other end of the flange (104) is fixedly connected to the pipe (105).

5. The air non-return device of the air conditioning and ventilation equipment according to claim 4, characterized in that: The valve cover assembly (2) comprises a valve cover body (201) and an annular protrusion (202); the bottom of the valve cover body (201) is fixedly connected to the annular protrusion (202); and the bottom of the annular protrusion (202) is movably connected to a sealing gasket (103).

6. The air non-return device of the air conditioning and ventilation equipment according to claim 1, characterized in that: The rotating shaft assembly (3) comprises a fixing member (301), a first connecting arm (302), a rotating shaft (303), a second connecting arm (304), a first connecting plate (305), a valve flap (306) and a second connecting plate (307); the bottom of the fixing member (301) is fixedly connected to the first connecting arm (302); the bottom of the front face of the first connecting arm (302) is movably connected to the rotating shaft (303); and the outer front face of the rotating shaft (303) is movably connected to the second connecting arm (304).

7. The air non-return device of the air conditioning and ventilation equipment according to claim 6, characterized in that: A first connecting plate (305) is fixedly connected to the bottom of one side of the second connecting arm (304), a valve flap (306) is fixedly connected to the other side of the second connecting arm (304), a magnet is fixedly connected inside the valve flap (306), and a second connecting plate (307) is fixedly connected to the bottom of the valve flap (306).

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