阅读说明：本技术 防火止回阀及厨房排烟设备 (Fireproof check valve and kitchen smoke exhausting equipment ) 是由 任富佳 李明 吴凯松 何峰 李富强 余丹阳 于 2021-07-26 设计创作，主要内容包括：本发明涉及厨房电器技术领域,尤其是涉及一种防火止回阀及厨房排烟设备。防火止回阀包括外壳、阀芯、阀片、驱动装置、第一感温释放部、第二感温释放部和机械防火机构；阀芯位于外壳的内部,阀片与阀芯转动连接,驱动装置的动力输出轴与阀片连接,以带动阀片开启或关闭；第一感温释放部与驱动装置连接,且第一感温释放部能够在第一设定温度下将阀片与驱动装置的动力输出轴分离；第二感温释放部能够在第二设定温度下解除对机械防火机构的限制,以使机械防火机构将阀片关闭,其中,第一设定温度低于第二设定温度。本发明能够在起火时使得阀片先与驱动装置分离,然后利用机械防火机构强制将阀片关闭。(The invention relates to the technical field of kitchen appliances, in particular to a fireproof check valve and kitchen smoke exhaust equipment. The fireproof check valve comprises a shell, a valve core, a valve plate, a driving device, a first temperature-sensing release part, a second temperature-sensing release part and a mechanical fireproof mechanism; the valve core is positioned in the shell, the valve plate is rotationally connected with the valve core, and a power output shaft of the driving device is connected with the valve plate so as to drive the valve plate to open or close; the first temperature sensing release part is connected with the driving device and can separate the valve plate from a power output shaft of the driving device at a first set temperature; the second temperature-sensing releasing part can release the limitation on the mechanical fireproof mechanism at a second set temperature so that the mechanical fireproof mechanism closes the valve plate, wherein the first set temperature is lower than the second set temperature. The invention can separate the valve plate from the driving device firstly when the fire is on, and then the valve plate is forced to be closed by utilizing the mechanical fireproof mechanism.)

1. A fireproof check valve is characterized by comprising a shell (1), a valve core (2), a valve plate (4), a driving device (3), a first temperature-sensing release part, a second temperature-sensing release part (6) and a mechanical fireproof mechanism; the valve core (2) is positioned in the shell (1), the valve plate (4) is rotatably connected with the valve core (2), and a power output shaft of the driving device (3) is connected with the valve plate (4) to drive the valve plate (4) to open or close; the first temperature sensing release part is connected with the driving device (3), and the first temperature sensing release part can separate the valve plate (4) from a power output shaft of the driving device (3) at a first set temperature; the second temperature-sensing release part (6) can release the limitation on the mechanical fireproof mechanism at a second set temperature so that the mechanical fireproof mechanism closes the valve plate (4), wherein the first set temperature is lower than the second set temperature.

2. The fire prevention check valve according to claim 1, wherein the first temperature sensitive release portion includes a fuse mechanism (5), a release link (7), and a first elastic member (8); the power output shaft of the driving device (3) is connected with the valve plate (4) through a transmission assembly, one end of the shaft-off connecting rod (7) is connected with the transmission assembly, the other end of the shaft-off connecting rod (7) is connected with the fusing mechanism (5), and the part between the two ends of the shaft-off connecting rod (7) is hinged with the shell (1) through a hinged shaft (9); the one end of first elastic component (8) with shell (1) is connected, the other end of first elastic component (8) with the other end of off-axis connecting rod (7) is connected, fuse-link mechanism (5) can remove under first settlement temperature right the restriction of off-axis connecting rod (7) so that first elastic component (8) drive off-axis connecting rod (7) wind the axis of articulated shaft (9) rotates, just the one end of off-axis connecting rod (7) can drive transmission assembly with the power output shaft separation of drive arrangement (3).

3. The fireproof check valve according to claim 2, characterized in that the valve plate (4) is connected to the valve core (2) by a first pin (15); the transmission assembly comprises a swing shaft (10) and a guide part (11), one end of the swing shaft (10) is connected with a power output shaft of the driving device (3), the other end of the swing shaft (10) is provided with a rod part (12), and the axis of the rod part (12) is parallel to the axis of the first pin shaft (15); the guide part (11) is fixedly connected with the valve plate (4), the rod part (12) is connected with the guide part (11), and the rod part (12) can drive the guide part (11) to move so that the valve plate (4) rotates around the axis of the first pin shaft (15); one end of the shaft-disengaging connecting rod (7) is hinged with a rotating part (13), and the rotating part (13) is fixedly connected with one end of the swing shaft (10).

4. The fireproof check valve according to claim 3, characterized in that a sleeve (16) is fixedly arranged at one end of the pendulum shaft (10), the axis of the sleeve (16) is perpendicular to the axis of the pendulum shaft (10), one end of the sleeve (16) is connected with the power output shaft of the driving device (3), and the other end of the sleeve (16) is fixedly connected with the rotating piece (13).

5. The fireproof check valve according to claim 3, characterized in that the guide part (11) is provided with a guide groove (18), the rod part (12) can move along the length direction of the guide groove (18) and drives the guide part (11) to move; the rod (12) can be separated from the guide groove (18).

6. The fireproof check valve according to claim 2, characterized in that a mounting plate (19) is arranged inside the housing (1), the mounting plate (19) is provided with a fixing frame (23), and one end of the first elastic member (8) is connected with the fixing frame (23).

7. The fireproof check valve according to claim 6, characterized in that the mechanical fireproof mechanism comprises a trigger arm (24), a valve rod (28), a second elastic member (25) and a third elastic member (26), wherein one end of the trigger arm (24) is connected with the fixed frame (23) through a second pin (27); the other end of the trigger rotating arm (24) is connected with the valve rod (28), and the second temperature-sensitive release part (6) is connected between the fixed frame (23) and the trigger rotating arm (24) so that the other end of the trigger rotating arm (24) can limit the valve rod (28) at an initial position; one end of the second elastic piece (25) is connected with the mounting plate (19), the other end of the second elastic piece (25) is connected with the other end of the trigger rotating arm (24), the second temperature sensing release part (6) releases the limitation on the trigger rotating arm (24) at a second set temperature, and the second elastic piece (25) can drive the trigger rotating arm (24) to rotate around the axis of the second pin shaft (27) so as to separate the trigger rotating arm (24) from the valve rod (28); the third elastic piece (26) is connected with the valve rod (28), and the third elastic piece (26) can drive the valve rod (28) to move so as to close the valve plate (4).

8. The fire protection check valve according to any one of claims 1 to 7, further comprising a control device, an alarm device and a temperature sensor (36), the control device being adapted to be connected to a kitchen fume extractor and the control device being connected to the drive device (3), the alarm device and the temperature sensor (36) being connected to the control device.

9. The fire protection check valve according to any one of claims 2 to 7, characterized in that the first elastic member (8) is an extension spring, the length direction of which is parallel to the axis of the power take-off shaft of the driving device (3).

10. A kitchen smoke evacuation device comprising a fire check valve as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of kitchen appliances, in particular to a fireproof check valve and kitchen smoke exhaust equipment.

Background

Current mechanical fire prevention check valve includes the base, the case, dustcoat and valve block, the pedestal mounting is in the outside of dustcoat, the case is installed inside the dustcoat, the valve block is connected on the case with rotating, there are fuse-link, knot pole and the elastic component that can fuse when the dustcoat internally mounted reaches the settlement temperature, under fire prevention check valve normal use state, the knot pole is spacing on the fuse-link, when the flue is on fire, fuse-link fuse, the knot pole breaks away from the fuse-link, and close the valve block under the effect of elastic component. Although the mechanical fire prevention mode can forcibly close the valve plate when a fire breaks out, the mechanical fire prevention mode cannot be applied to the electric fire prevention valve, and therefore the electric fire prevention valve cannot forcibly close the valve plate when the fire breaks out.

Disclosure of Invention

The invention aims to provide a fireproof check valve and kitchen smoke exhaust equipment, which are used for solving the technical problem that an electric fireproof valve in the prior art cannot forcibly close a valve plate in a mechanical fireproof mode.

Based on the purpose, the invention provides a fireproof check valve, which comprises a shell, a valve core, a valve plate, a driving device, a first temperature-sensing release part, a second temperature-sensing release part and a mechanical fireproof mechanism, wherein the valve core is arranged on the shell; the valve core is positioned in the shell, the valve plate is rotationally connected with the valve core, and a power output shaft of the driving device is connected with the valve plate so as to drive the valve plate to open or close; the first temperature sensing release part is connected with the driving device and can separate the valve plate from a power output shaft of the driving device at a first set temperature; the second temperature-sensing releasing part can release the limitation on the mechanical fireproof mechanism at a second set temperature so that the mechanical fireproof mechanism closes the valve plate, wherein the first set temperature is lower than the second set temperature.

Further, in some optional embodiments, the first temperature-sensing release part comprises a fusing mechanism, a release link and a first elastic element; the power output shaft of the driving device is connected with the valve plate through a transmission assembly, one end of the shaft-off connecting rod is connected with the transmission assembly, the other end of the shaft-off connecting rod is connected with the fusing mechanism, and the part between the two ends of the shaft-off connecting rod is hinged with the shell through a hinged shaft; one end of the first elastic piece is connected with the shell, the other end of the first elastic piece is connected with the other end of the off-axis connecting rod, the fusing mechanism can remove the limitation on the off-axis connecting rod at a first set temperature, so that the first elastic piece drives the off-axis connecting rod to rotate around the axis of the hinged shaft, and one end of the off-axis connecting rod can drive the transmission assembly to be separated from the power output shaft of the driving device.

Further, in some optional embodiments, the valve plate is connected with the valve core through a first pin shaft; the transmission assembly comprises a swing shaft and a guide part, one end of the swing shaft is connected with a power output shaft of the driving device, the other end of the swing shaft is provided with a rod part, and the axis of the rod part is parallel to the axis of the first pin shaft; the guide part is fixedly connected with the valve plate, the rod part is connected with the guide part and can drive the guide part to move, so that the valve plate rotates around the axis of the first pin shaft; one end of the off-axis connecting rod is hinged with a rotating part, and the rotating part is fixedly connected with one end of the swing shaft.

Further, in some optional embodiments, a sleeve is fixedly arranged at one end of the pendulum shaft, the axis of the sleeve is perpendicular to the axis of the pendulum shaft, one end of the sleeve is connected with the power output shaft of the driving device, and the other end of the sleeve is fixedly connected with the rotating piece.

Further, in some optional embodiments, the guide part is provided with a guide groove, and the rod part can move along the length direction of the guide groove and drive the guide part to move; the rod portion is separable from the guide groove.

Further, in some optional embodiments, a mounting plate is arranged inside the housing, the mounting plate is provided with a fixing frame, and one end of the first elastic element is connected with the fixing frame.

Further, in some optional embodiments, the mechanical fireproof mechanism comprises a trigger rotating arm, a valve rod, a second elastic member and a third elastic member, and one end of the trigger rotating arm is connected with the fixed frame through a second pin; the other end of the trigger rotating arm is connected with the valve rod, and the second temperature-sensing release part is connected between the fixed frame and the trigger rotating arm so that the valve rod can be limited at an initial position by the other end of the trigger rotating arm; one end of the second elastic piece is connected with the mounting plate, the other end of the second elastic piece is connected with the other end of the trigger rotating arm, the second temperature sensing release part releases the limitation on the trigger rotating arm at a second set temperature, and the second elastic piece can drive the trigger rotating arm to rotate around the axis of the second pin shaft so as to separate the trigger rotating arm from the valve rod; the third elastic piece is connected with the valve rod, and the third elastic piece can drive the valve rod to move so as to close the valve plate.

Further, in some optional embodiments, the fireproof check valve further comprises a control device, an alarm device and a temperature sensor, the control device is used for being connected with a kitchen smoke exhaust device, the control device is connected with the driving device, and the alarm device and the temperature sensor are both connected with the control device.

Further, in some optional embodiments, the fire check valve further comprises an alarm device and a temperature sensor, and the alarm device and the temperature sensor are both connected with the control device.

Further, in some optional embodiments, the first elastic member is an extension spring, and a length direction of the extension spring is parallel to an axis of a power output shaft of the driving device.

Based on the above purpose, the invention also provides a kitchen smoke exhausting device, which comprises the fireproof check valve.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides a fireproof check valve which comprises a shell, a valve core, a valve plate, a driving device, a first temperature-sensing release part, a second temperature-sensing release part and a mechanical fireproof mechanism, wherein the valve core is arranged on the shell; the valve core is positioned in the shell, the valve plate is rotationally connected with the valve core, and a power output shaft of the driving device is connected with the valve plate so as to drive the valve plate to open or close; the first temperature sensing release part is connected with the driving device and can separate the valve plate from a power output shaft of the driving device at a first set temperature; the second temperature-sensing releasing part can release the limitation on the mechanical fireproof mechanism at a second set temperature so that the mechanical fireproof mechanism closes the valve plate, wherein the first set temperature is lower than the second set temperature.

Based on the structure, the fireproof check valve provided by the invention utilizes the driving mechanism to drive the valve plate to open and close when in normal use. When the flue is on fire, the temperature rises gradually, and when the temperature reaches a first set temperature, the first temperature sensing release part separates the valve plate from the power output shaft of the driving device, and at the moment, the valve plate is not driven by the driving device any more. When the temperature is further increased to a second set temperature, the second temperature sensing release part releases the limitation on the mechanical fire prevention mechanism, so that the mechanical fire prevention mechanism forcibly closes the valve plate. Because first settlement temperature is less than the second settlement temperature, can guarantee that the valve block separates with drive arrangement earlier, then mechanical fire prevention mechanism just forces the valve block to close.

According to the kitchen smoke exhausting equipment, due to the fireproof check valve, the valve plate can be separated from the driving device firstly when a fire happens, and then the valve plate is forced to be closed by the mechanical fireproof mechanism.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a fire check valve according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another view of a fire check valve according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at C;

FIG. 4 is a cross-sectional view of a fire check valve according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a control device according to a first embodiment of the present invention.

Icon: 1-a housing; 2-a valve core; 3-a drive device; 4, valve plates; 5-a fusing mechanism; 6-a second temperature-sensing releasing part; 7-connecting rod of the release shaft; 8-a first elastic member; 9-a hinged axis; 10-a pendulum shaft; 11-a guide; 12-a stem portion; 13-a rotating member; 14-a scaffold; 15-a first pin; 16-a sleeve; 17-fixing the sleeve; 18-a guide groove; 19-mounting a plate; 20-mounting a coaming plate; 21-lower coaming; 22-arc side plate; 23-a fixing frame; 24-triggering the tumbler; 25-a second elastic member; 26-a third elastic member; 27-a second pin; 28-a valve rod; 29-a first track groove; 30-a control box; 31-an electronic control board; 32-a power plug; 33-a socket; 34-a control line; 35-an aviation plug; 36-a temperature sensor; 37-sealing ring.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable 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 invention can be understood in specific cases to those skilled in the art.

Example one

Referring to fig. 1 to 5, the present embodiment provides a fire-proof check valve, which includes a housing 1, a valve core 2, a valve plate 4, a driving device 3, a first temperature-sensitive release portion, a second temperature-sensitive release portion 6, and a mechanical fire-proof mechanism; the valve core 2 is positioned in the shell 1, the valve plate 4 is rotationally connected with the valve core 2, and a power output shaft of the driving device 3 is connected with the valve plate 4 so as to drive the valve plate 4 to open or close; the first temperature sensing release part is connected with the driving device 3 and can separate the valve plate 4 from a power output shaft of the driving device 3 at a first set temperature; the second temperature-sensitive release unit 6 can release the restriction on the mechanical fire prevention mechanism at a second set temperature, so that the mechanical fire prevention mechanism closes the valve sheet 4, wherein the first set temperature is lower than the second set temperature.

This embodiment provides a fire prevention check valve, and when normal use, utilizes actuating mechanism to drive opening and closing of valve block 4. When the flue is on fire, the temperature rises gradually, and when the temperature reaches a first set temperature, the first temperature sensing release part separates the valve plate 4 from the power output shaft of the driving device 3, and at the moment, the valve plate 4 is not driven by the driving device 3 any more. When the temperature further rises to the second set temperature, the second temperature-sensitive release part 6 releases the restriction on the mechanical fire prevention mechanism, so that the mechanical fire prevention mechanism forcibly closes the valve sheet 4. Because first settlement temperature is less than the second settlement temperature, can guarantee that valve block 4 separates with drive arrangement 3 earlier, then mechanical fire prevention mechanism forces valve block 4 to close.

Further, in some optional embodiments, the first temperature-sensitive release portion includes the fusing mechanism 5, and includes the release link 7 and the first elastic member 8; a power output shaft of the driving device 3 is connected with the valve plate 4 through a transmission component, one end of a shaft release connecting rod 7 is connected with the transmission component, the other end of the shaft release connecting rod 7 is connected with the fusing mechanism 5, and the part between the two ends of the shaft release connecting rod 7 is hinged with the shell 1 through a hinged shaft 9; one end of the first elastic piece 8 is connected with the shell 1, the other end of the first elastic piece 8 is connected with the other end of the off-axis connecting rod 7, and the fusing mechanism 5 can remove the limitation on the off-axis connecting rod 7 at a first set temperature, so that the first elastic piece 8 drives the off-axis connecting rod 7 to rotate around the axis of the hinged shaft 9, and one end of the off-axis connecting rod 7 can drive the transmission assembly to be separated from the power output shaft of the driving device 3.

When the flue is on fire, the temperature gradually rises, and when the temperature reaches a first set temperature, the fusing mechanism 5 releases the limitation on the off-axis connecting rod 7, and meanwhile, the first elastic piece 8 drives the off-axis connecting rod 7 to rotate around the axis of the hinged shaft 9, so that one end of the off-axis connecting rod 7 drives the transmission assembly to be separated from the power output shaft of the driving device 3.

Alternatively, the fusing mechanism 5 and the second temperature-sensitive releasing portion 6 in the present embodiment are both fuse pieces.

The fusing mechanism 5 and the second temperature-sensitive releasing unit 6 may be physically deformable temperature-sensitive sheets.

Further, in some optional embodiments, the valve plate 4 is connected with the valve core 2 through a first pin 15; the transmission assembly comprises a swing shaft 10 and a guide part 11, one end of the swing shaft 10 is connected with a power output shaft of the driving device 3, the other end of the swing shaft 10 is provided with a rod part 12, and the axis of the rod part 12 is parallel to the axis of a first pin shaft 15; the guide part 11 is fixedly connected with the valve plate 4, the rod part 12 is connected with the guide part 11, and the rod part 12 can drive the guide part 11 to move so that the valve plate 4 rotates around the axis of the first pin shaft 15; one end of the off-axis connecting rod 7 is hinged with a rotating part 13, and the rotating part 13 is fixedly connected with one end of the swing shaft 10.

Specifically, a bracket 14 is fixedly arranged on the valve plate 4, and the bracket 14 is hinged with the valve core 2 through a first pin 15. The guide portion 11 is bolted to the valve sheet 4. When smoke needs to be discharged, the driving device 3 works to drive the swing shaft 10 and the rod part 12 to rotate around the axis of the power output shaft of the driving device 3, and the rod part 12 drives the guide part 11 to move so as to drive the valve plate 4 to rotate around the axis of the first pin shaft 15. The rotating piece 13 is in a rod shape, the length direction of the rotating piece 13 is parallel to the axis of the power output shaft of the driving device 3, one end of the rotating piece 13 is hinged to the shaft-disengaging connecting rod 7, the other end of the rotating piece 13 is fixedly connected with one end of the swing shaft 10, when the first elastic piece 8 drives the shaft-disengaging connecting rod 7 to rotate around the axis of the hinged shaft 9, the shaft-disengaging connecting rod 7 and the rotating piece 13 also rotate, and therefore the rotating piece 13 is guaranteed to move towards the direction far away from the driving device 3 along the length direction of the rotating piece 13, and the swing shaft 10 is separated from the power output shaft of the driving device 3.

Further, in some alternative embodiments, one end of the pendulum shaft 10 is fixedly provided with a sleeve 16, the axis of the sleeve 16 is perpendicular to the axis of the pendulum shaft 10, one end of the sleeve 16 is connected with the power output shaft of the driving device 3, and the other end of the sleeve 16 is fixedly connected with the rotating member 13.

Specifically, the inside of the housing 1 is further provided with a fixed sleeve 17, the other end of the sleeve 16 and the other end of the rotating part 13 are both located inside the fixed sleeve 17, the inner diameter of the sleeve 16 is larger than the outer diameter of the rotating part 13, the rotating part 13 is nested inside the sleeve 16, and the rotating part 13 is fixedly connected with the sleeve 16 through screws. When the first elastic element 8 drives the off-axis connecting rod 7 to rotate around the axis of the hinge shaft 9, the off-axis connecting rod 7 and the rotating element 13 also rotate, so that the rotating element 13 is ensured to move towards the direction far away from the driving device 3 along the length direction of the rotating element 13, and the sleeve 16 is separated from the power output shaft of the driving device 3.

Further, in some alternative embodiments, the guide portion 11 is provided with a guide slot 18, and the rod portion 12 can move along the length direction of the guide slot 18 and drive the guide portion 11 to move; the rod portion 12 can be separated from the guide groove 18.

Specifically, the outer diameter of the rod portion 12 is adapted to the width of the guide groove 18, and under the driving of the driving device 3, the rod portion 12 reciprocates in the guide groove 18, so that the guide portion 11 drives the valve sheet 4 to rotate around the axis of the first pin 15, thereby opening and closing the valve sheet 4. The arrow direction a in fig. 4 is the opening direction of the valve plate 4, and the arrow direction B is the closing direction of the valve plate 4.

When the sleeve 16 is separated from the power take-off shaft of the drive means 3, the rod portion 12 is also separated from the guide groove 18.

Further, in some alternative embodiments, the inside of the housing 1 is provided with a mounting plate 19, the mounting plate 19 is provided with a fixing frame 23, and one end of the first elastic member 8 is connected with the fixing frame 23.

Optionally, the present embodiment further includes an upper surrounding plate 20, a lower surrounding plate 21, and an arc-shaped side plate 22, where the upper surrounding plate 20 and the lower surrounding plate 21 are both welded to the valve core 2, and the arc-shaped side plate 22 is connected to the upper surrounding plate 20 and the lower surrounding plate 21 by rivets. The mounting plate 19 is connected to the upper shroud 20 and the lower shroud 21 by screws.

Further, in some optional embodiments, the mechanical fire prevention mechanism includes a trigger rotating arm 24, a valve rod 28, a second elastic member 25 and a third elastic member 26, and one end of the trigger rotating arm 24 is connected to the fixed frame 23 through a second pin 27; the other end of the trigger rotating arm 24 is connected with the valve rod 28, and the second temperature sensing release part 6 is connected between the fixed frame 23 and the trigger rotating arm 24, so that the other end of the trigger rotating arm 24 can limit the valve rod 28 at an initial position; one end of a second elastic member 25 is connected with the mounting plate 19, the other end of the second elastic member 25 is connected with the other end of the trigger rotating arm 24, the second temperature-sensitive release part 6 releases the limitation on the trigger rotating arm 24 at a second set temperature, and the second elastic member 25 can drive the trigger rotating arm 24 to rotate around the axis of a second pin shaft 27 so as to separate the trigger rotating arm 24 from the valve rod 28; the third elastic member 26 is connected to the valve rod 28, and the third elastic member 26 can move the valve rod 28 to close the valve plate 4.

Specifically, the trigger arm 24 is provided with a hook portion, and the valve rod 28 is fixed to the hook portion at a position limited in the initial position, that is, when a fire is not occurring, and does not affect opening and closing of the valve sheet 4. When a fire occurs, the temperature gradually rises, when the temperature reaches a first set temperature, the fusing mechanism 5 releases the limitation on the release connecting rod 7, meanwhile, the first elastic piece 8 drives the release connecting rod 7 to rotate around the axis of the hinge shaft 9, so that one end of the release connecting rod 7 drives the sleeve 16 to be separated from the power output shaft of the driving device 3, and at the moment, the valve plate 4 is not driven by the driving device 3 any more. When the temperature further rises to the second set temperature, the second temperature-sensitive release 6 melts to release the restriction of the trigger arm 24, and at the same time, the second elastic member 25 rotates the trigger arm 24 about the axis of the second pin 27 to separate the trigger arm 24 from the valve rod 28. At the same time, the third elastic member 26 moves the valve rod 28 to force the valve plate 4 to close.

In this embodiment, the third elastic member 26 is a U-shaped extension spring. The third elastic element 26 is positioned between the housing 1 and a U-shaped structure formed by the upper enclosing plate 20, the lower enclosing plate 21 and the arc-shaped side plate 22, the upper enclosing plate 20 is provided with a first rail groove 29, the lower enclosing plate 21 is provided with a second rail groove, the first rail groove 29 and the second rail groove are oppositely arranged, and the first rail groove 29 and the second rail groove both extend from one end close to the valve rod to the direction close to the valve plate 4; the valve rod passes first track groove 29 and second track groove, the one end of valve rod and the one end fixed connection of third elastic component 26, the other end of valve rod and the other end fixed connection of third elastic component 26, and third elastic component 26 can drive the valve rod and remove along the extending direction in first track groove 29 and second track groove to force valve block 4 to close.

Further, in some optional embodiments, the fire check valve further comprises a control device, an alarm device and a temperature sensor 36, wherein the control device is used for being connected with a kitchen fume extractor, the control device is connected with the driving device 3, and the alarm device and the temperature sensor 36 are both connected with the control device.

In this embodiment, referring to fig. 5, the control device includes a control box 30, an electronic control board 31, a power plug 32, a socket 33 and a control wire 34, the electronic control board 31 is fixed inside the control box 30 by screws, and the power plug 32, the socket 33 and the control wire 34 are fixed inside the control box 30 by snap rings and are respectively plugged onto the electronic control board 31. The power plug 32 is used for being plugged into a 220V power socket 33 near a public flue port, the socket 33 is used for being connected with the power plug 32 of the range hood, and the control line 34 is connected with an aviation plug 35 in the fireproof check valve.

When a kitchen fume extractor (hereinafter, a fume extractor is taken as an example) starts to work, the electric control board 31 detects the working current of the fume extractor, determines that the fume extractor has worked, and then sends an instruction to control the driving device 3 to operate, and the driving device 3 drives the swing shaft 10 to rotate, so that the rod part 12 drives the guide part 11 to move, and further, the valve plate 4 is opened.

When the range hood stops working, the electric control board 31 detects that the range hood stops working, judges that the range hood stops working, and then sends an instruction to control the driving device 3 to operate, so that the valve plate 4 is closed. In addition, the electronic control board 31 is provided with a wireless communication module, which can realize communication linkage with the central range hood host, and when the host sends an instruction, the electronic control board 31 can control the operation of the driving device 3 according to the host instruction, so that the valve plate 4 is opened to a required angle.

In this embodiment, the alarm device is a buzzer, and the buzzer is disposed on the electric control board 31.

When a fire occurs, the temperature sensor 36 detects a set temperature (for example, 110 ± 5 ℃) at which the fire occurs, the electric control board 31 judges that the fire occurs, sends an instruction to control the driving device 3 to operate, closes the valve plate 4, and sends an instruction to enable the buzzer on the electric control board 31 to continuously alarm.

When the fire continues to spread and the temperature reaches the first set temperature (for example 125 ℃) and is kept for more than one minute, the fusing mechanism 5 is fused, and the first elastic member 8 drives the release link 7 to rotate around the axis of the hinge shaft 9, so that the sleeve 16 is separated from the power output shaft of the driving device 3, and simultaneously, the rod part 12 is separated from the guide groove 18. When the fire continues to spread and the temperature reaches a second set temperature (for example, 152 ℃) and is kept for more than one minute, the second temperature-sensing release part 6 is fused, the second elastic part 25 drives the trigger rotating arm 24 to rotate, the trigger rotating arm 24 contacts with the limit of the valve rod, the valve rod moves along the extension direction of the first track groove 29 and the second track groove under the action of the third elastic part 26 until the valve plate 4 is pressed, so that the valve plate 4 is forcibly closed, and the fireproof sealing effect is achieved.

Further, in some alternative embodiments, the first elastic member 8 is an extension spring, and the length direction of the extension spring is parallel to the axis of the power output shaft of the driving device 3.

In this embodiment, the second elastic member 25 is also an extension spring.

Further, in some alternative embodiments, the valve plate 4 is provided with a sealing ring 37.

Specifically, the seal ring 37 is fitted around the edge of the valve sheet 4.

Further, in some alternative embodiments, the driving device 3 is a speed reduction motor.

The first temperature sensing releasing unit may be a fuse mechanism 5 directly connected to the power output shaft of the reduction motor.

Example two

The embodiment provides kitchen smoke exhausting equipment comprising the fireproof check valve.

According to the kitchen smoke exhausting equipment provided by the embodiment of the invention, due to the use of the fireproof check valve provided by the first embodiment of the invention, the valve plate 4 can be separated from the driving device 3 firstly when a fire happens, and then the valve plate 4 is forcibly closed by utilizing a mechanical fireproof mechanism.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.