Temperature sensing reaction device and fireproof check valve

Abstract

The invention relates to the technical field of check valves, in particular to a temperature sensing reaction device and a fireproof check valve, and the temperature sensing reaction device comprises a mounting table, a baffle, an elastic piece and a temperature sensing material; when the temperature rises to the melting point of the temperature-sensitive material, the temperature-sensitive material melts, and the elastic force of the elastic piece enables the baffle to rotate to an unfolded state. The temperature sensing reaction device can further comprise a motor, a temperature sensing element and a circuit board. The motor is used for driving the fan blade plate to rotate, so that the fan blade plate is in an open state or a closed state; the circuit board is used for judging whether the range hood is started; the temperature sensing element is electrically connected with the circuit board and is used for detecting temperature. The fan blade plates are obliquely arranged, the hinged ends of the fan blade plates are located at the upper end of the flue gas channel, oil dirt can be prevented from being accumulated at the hinged ends of the fan blade plates, the fan blade plates can be easily pushed away by flue gas needing to be exhausted, and when the flue gas does not need to be exhausted, the obliquely arranged fan blade plates can automatically fall back by means of gravity, so that the fan blade plates are prevented from being damaged. Therefore, the flue gas channel is cut off.

Description

Technical Field

[0001] The present invention relates to the technical field of check valves, and in particular to a temperature-sensitive reaction device and a fire-proof check valve. Background Art

[0002] In the ventilation ducts of public places or in the smoke exhaust ducts of range hoods, check valves are usually installed to prevent the spread of high-temperature smoke in the event of a fire. Check valves used in public flues or direct exhaust from external walls have higher requirements for the opening effect, fire resistance, and sealing effect of the check door panels.

[0003] For example, a Chinese invention patent with publication number CN113790291B discloses a fire-proof check valve, including a valve housing, a valve seat and a valve flap, wherein the valve housing is installed on a residential exhaust duct and is located outside the residential exhaust duct, the valve housing is used to provide an exhaust channel and is connected to an air inlet of the residential exhaust duct, the valve seat is arranged on the valve housing and is located on an air inlet side of the exhaust channel, the valve flap is rotatably arranged on the valve housing and cooperates with the valve seat to open or close the exhaust channel, wherein the plane where the valve seat is located is inclined downward toward the air inlet side of the exhaust channel, and an air inlet pipe is arranged on the valve seat, so that the gas has an inclined upward flow direction when entering the exhaust channel from the air inlet pipe.

[0004] In the above-mentioned prior art, the opening and closing mechanism includes a torsion spring, a tower spring, a valve shaft, a support, etc., and the opening and closing of the valve flap completely depends on the opening and closing mechanism. These parts are all installed at the lower end of the valve housing. Since the smoke often carries oil droplets and dust during the flow process, the oil and dust are easily deposited at the lower end of the valve housing, and the opening and closing mechanism is easily corroded and blocked by the oil, resulting in the valve flap opening and closing being blocked, such as being unable to be fully opened or closed, affecting the exhaust and fire and smoke prevention functions. Summary of the invention

[0005] In order to solve the problems in the prior art that the valve flap completely relies on the opening and closing mechanism for opening and closing and the opening and closing mechanism in the prior art is easily affected by oil pollution, the purpose of the present invention is to provide a temperature sensing reaction device and a fireproof check valve.

[0006] The technical solution provided by the present invention is:

[0007] In a first aspect, a temperature sensing reaction device includes a mounting platform, a baffle, an elastic member, and a temperature sensing material;

[0008] in:

[0009] The baffle is located on one side of the mounting platform and is hinged to the mounting platform;

[0010] The baffle is also connected to the mounting platform through an elastic member, and is fixedly connected to the mounting platform through a temperature-sensitive material;

[0011] When the temperature rises to the melting point of the temperature-sensitive material, the temperature-sensitive material melts, and the elastic force of the elastic member causes the baffle to rotate to an extended state, and the baffle presses against the fan blade plate to keep the fan blade plate in a closed state.

[0012] As an optional technical solution of the first aspect, the baffle is provided with an insert; the mounting platform is provided with a through hole for allowing the insert to pass through;

[0013] The insert piece passing through the through hole is provided with a stopper, and the stopper abuts against the mounting platform; the stopper is made of the temperature-sensitive material.

[0014] As an optional technical solution of the first aspect, the mounting platform is connected to a first connecting piece, and the baffle is connected to a second connecting piece; the first connecting piece and the second connecting piece are connected by a temperature-sensitive material.

[0015] Optionally, the temperature sensitive material has a melting point of 120°C to 190°C.

[0016] As an optional technical solution of the first aspect, the baffle is hinged to the mounting platform via a first connecting shaft; the elastic member is a torsion spring, which is sleeved on the first connecting shaft; two extensions of the torsion spring are respectively against the baffle and the mounting platform;

[0017] and / or:

[0018] The elastic member is a tension spring, and two ends of the tension spring are respectively connected to the baffle and the mounting platform.

[0019] In a second aspect, a fire check valve comprises:

[0020] A valve body, the valve body comprising a seat body and a cylinder body connected to the seat body, the seat body and the cylinder body being provided with a smoke passage;

[0021] The fan blade plate is arranged in the smoke passage; the smoke passage on one side of the fan blade plate is the smoke inlet end, and the smoke passage on the other side is the smoke outlet end;

[0022] The upper end of the fan blade plate is inclined toward the smoke inlet end and is hinged to the valve body; the fan blade plate can be pushed by the smoke to rotate toward the smoke outlet end, so that the smoke channel is in a connected state; or the fan blade plate can be rotated toward the smoke inlet end by gravity, so that the smoke channel is in a cut-off state;

[0023] The upper part of the smoke exhaust end is provided with a temperature sensing reaction device as described in the first aspect;

[0024] The mounting platform is connected to the valve body; when the baffle is rotated to the unfolded state, the baffle abuts against the fan blade, so that the smoke channel is in a cut-off state.

[0025] In a third aspect, a temperature sensing reaction device includes a motor, a temperature sensing element, and a circuit board;

[0026] in:

[0027] The motor is used to drive the fan blade to rotate, so that the fan blade is in an open state or a closed state;

[0028] The circuit board is used to be electrically connected with the range hood, the motor, and the temperature sensing element, and is used to determine whether the range hood is turned on; when the range hood is turned on, the motor drives the fan blade plate to rotate to the open state; when the range hood is turned off, the motor drives the fan blade plate to rotate to the closed state;

[0029] The temperature sensing element is electrically connected to the circuit board and is used to detect the temperature; when the temperature exceeds 120°C, the motor can drive the fan blade to rotate to a closed state.

[0030] As an optional technical solution of the second aspect, it also includes a battery, which is used to supply power to the circuit board, the motor and the temperature sensing element.

[0031] In a fourth aspect, a fire check valve comprises:

[0032] The valve body comprises a seat body and a cylinder body connected to the seat body, and the seat body and the cylinder body are provided with a smoke channel;

[0033] The fan blade plate is arranged in the smoke passage; the smoke passage on one side of the fan blade plate is the smoke inlet end, and the smoke passage on the other side is the smoke outlet end; the upper end of the fan blade plate is inclined toward the smoke inlet end;

[0034] The upper part of the smoke exhaust end is provided with a temperature sensing reaction device as described in the third aspect;

[0035] The motor is installed on the valve body;

[0036] When the motor drives the fan blade to rotate to the open state, the fan blade rotates toward the smoke exhaust end, so that the smoke passage is in a connected state;

[0037] When the motor drives the fan blade to rotate to the closed state, the fan blade rotates toward the smoke inlet end, so that the smoke channel is in a cut-off state.

[0038] As an optional technical solution of the second aspect, the fan blade is hinged to the mounting platform through a second connecting shaft; the central axis of the second connecting shaft is perpendicular to the baffle rotation axis, and the central axis of the second connecting shaft is parallel to the central axis of the cylinder.

[0039] As an optional technical solution of the second aspect, a bending portion is provided on a side of the baffle plate close to the fan blade; the length extension direction of the bending portion is roughly parallel to the central axis of the cylinder.

[0040] Optionally, the fan blade plate is provided with an annular protrusion; the second connecting shaft is connected to the annular protrusion via a connecting plate.

[0041] As an optional technical solution of the second or fourth aspect, the fan blade plate is located at the connection between the seat body and the cylinder body; the fan blade plate is circular, and its diameter is larger than the inner diameter of the chimney.

[0042] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0043] The temperature sensing reaction device of the present invention is easy to assemble and easy to operate at high temperatures. The fan blade of the present invention is tilted, and the hinged end of the fan blade is located at the upper end of the smoke passage, which can prevent oil from accumulating at the hinged end of the fan blade. The fan blade can be easily pushed away by the smoke that needs to be discharged, and when the smoke does not need to be discharged, the tilted fan blade can automatically fall back by gravity, so that the smoke passage is cut off. In addition, the baffles, elastic parts and other structures in the present application are all arranged at the upper end of the smoke passage, which can avoid blockage and pollution by oil, thereby preventing the baffle from being unable to resist the fan blade when a fire occurs, and preventing the fire and smoke prevention performance from being affected.

[0044] In addition, the fan blade plate in the present application rotates toward the smoke inlet end so that the smoke channel is cut off. When the smoke does not need to be discharged, the smoke in the residential exhaust duct can push the fan blade plate to rotate toward the smoke inlet end, and the smoke in the residential exhaust duct is less likely to blow back into the smoke inlet end. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a three-dimensional schematic diagram of a fire check valve in an embodiment of the present application;

[0046] Figure 2 A side view of a fire-proof check valve in one embodiment of the present application;

[0047] Figure 3 This is a schematic diagram of smoke flow through a fire check valve in one embodiment of the present application;

[0048] Figure 4 This is a schematic diagram of the connection between the fan blade plate and the connecting plate in one embodiment of the present application;

[0049] Figure 5 This is a schematic diagram of the connection between the first connecting piece and the second connecting piece in one embodiment of the present application;

[0050] Figure 6 This is a schematic diagram of a baffle plate and a fan blade plate abutting against each other in one embodiment of the present application;

[0051] Figure 7 This is a schematic diagram of the structure of a mounting platform in one embodiment of the present application;

[0052] Figure 8 This is a schematic diagram of an embodiment of the present application in which the elastic member is a tension spring;

[0053] Fig. 9This is a schematic diagram of motor installation in one embodiment of the present application.

[0054] Explanation of the symbols in the schematic diagram:

[0055] The seat body 101, the blade plate 102, the cylinder body 103, the connecting plate 104, the second connecting shaft 105, the annular protrusion 106, and the step surface 107;

[0056] A mounting platform 201, a first connecting shaft 202, a torsion spring 203, a baffle 204, a bending portion 205, and a tension spring 206;

[0057] Insert 301, stopper 302, through hole 303;

[0058] A first connecting piece 401 and a second connecting piece 402;

[0059] Cover 501 , motor 502 , circuit board 503 , battery 504 , and pressure detector 505 . DETAILED DESCRIPTION

[0060] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0061] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0062] In one embodiment, the present invention provides a temperature sensing reaction device, including a mounting platform 201, a baffle 204, an elastic member, and a temperature sensing material. The baffle 204 is located on one side of the mounting platform 201. For example, when the mounting platform 201 is placed flat, the baffle 204 is located on the lower side of the mounting platform 201. The baffle 203 is also hinged to the mounting platform 201, that is, the baffle 203 can rotate relative to the mounting platform 201.

[0063] The baffle 204 is also connected to the mounting platform 201 through an elastic member, and is fixedly connected to the mounting platform 201 through a temperature-sensitive material.

[0064] When the temperature rises to the melting point of the temperature-sensitive material, the temperature-sensitive material melts. At this time, the baffle 204 is no longer fixed by the temperature-sensitive material. Under the elastic force of the elastic member, the baffle 204 will rotate to the expanded state. The baffle 204 in the expanded state will press against the fan blade plate 102 to keep the fan blade plate 102 in the closed state.

[0065] like Figure 1-3 As shown, the present invention proposes a fire check valve, including a valve body, a fan blade plate 102, a baffle 204, an elastic member, and a temperature-sensitive material. The valve body includes a seat body 101 and a cylinder body 103 connected to the seat body 101. The seat body 101 and the cylinder body 103 are provided with a smoke channel, and one end of the smoke channel is connected to an indoor smoke exhaust device, such as a smoke exhaust pipe of a range hood. The other end of the smoke channel is connected to a residential exhaust duct. After the smoke exhausted by the indoor smoke exhaust device passes through this fire check valve, it enters the residential exhaust duct and is discharged uniformly.

[0066] The fan blade plate 102 is arranged in the smoke passage. The smoke passage can be in a connected state or a cut-off state by controlling the fan blade plate 102. When the smoke passage is in a connected state, smoke exhausted by the indoor smoke exhaust equipment can enter the residential exhaust duct through the smoke passage. When the smoke passage is in a cut-off state, smoke cannot circulate in the smoke passage.

[0067] like Figure 3 As shown, the smoke channel on one side of the fan blade plate 102 is the smoke inlet end, and the smoke channel on the other side is the smoke outlet end. The smoke inlet end is connected to the indoor smoke exhaust equipment. The smoke exhausted by the indoor smoke exhaust equipment enters the smoke channel through the smoke inlet end. After the smoke pushes open the fan blade plate 102, the smoke enters the residential exhaust duct through the smoke outlet end.

[0068] In order to enable the fan blade 102 to be pushed by the smoke exhausted by the indoor smoke exhaust equipment, and also to prevent the smoke in the residential exhaust duct from entering the room through the fire check valve, in this embodiment, the fan blade 102 is hinged to the valve body, that is, the fan blade 102 can rotate, so that the smoke channel is cut off or in a connected state.

[0069] Specifically, the upper end of the fan blade plate 102 in this solution is inclined toward the smoke inlet end, and the upper end of the fan blade plate 102 is hinged to the valve body, so that when the smoke flowing from the smoke inlet end to the smoke outlet end pushes the fan blade plate 102 to rotate, the fan blade plate 102 is pushed by the smoke to rotate toward the smoke outlet end, and at this time, the fan blade plate 102 rotates toward the top of the smoke channel, and the fan blade plate 102 rotating toward the top of the smoke channel will make the smoke channel in a connected state. When the indoor smoke exhaust equipment is turned off and there is no smoke flowing in the smoke channel, the fan blade plate 102 pushed to a high place will fall under the influence of gravity, that is, the fan blade plate 102 rotates toward the smoke inlet end, thereby cutting off the smoke channel, which can prevent the smoke at the smoke outlet end from flowing back into the room.

[0070] Since the upper end of the blade plate 102 is hinged to the valve body and can be easily rotated by the smoke, and can also fall back by gravity, the installation structure of the blade plate 102 is simpler, thereby reducing the failure rate. At the same time, the hinge structure arranged at the upper end of the smoke channel can also avoid oil blockage and pollution.

[0071] When a fire occurs, in order to block the flow of smoke, the fan blade 102 needs to cut off the smoke passage, and it is necessary to ensure that the fan blade 102 cannot rotate. In this embodiment, a baffle 204, an elastic member, and a temperature-sensitive material are provided at the upper part of the smoke exhaust end. The baffle 204, the elastic member, and the temperature-sensitive material are provided at the upper part of the smoke exhaust end, that is, at the upper part of the smoke passage, so that the oil accumulated downward in the smoke passage can be prevented from covering these parts, that is, the oil can be prevented from blocking and contaminating these parts.

[0072] Specifically, the baffle 204 is hinged to the valve body, and the baffle 204 is locked with the valve body through the temperature-sensitive material. The elastic member is installed between the baffle 204 and the valve body, and the elastic member can be in a compressed or stretched state. When the temperature rises to the melting point of the temperature-sensitive material, the temperature-sensitive material releases the locking state of the baffle 204, and the elastic member can drive the baffle 204 to rotate. The baffle 204 rotates to abut against the fan blade plate 102. The abutted fan blade plate 102 can no longer rotate toward the smoke exhaust end, and the smoke channel is cut off by the fan blade plate 102, and the smoke cannot circulate in the smoke channel, thereby achieving fire and smoke prevention functions.

[0073] As for the structure of the valve body, in one embodiment, the valve body includes a seat body 101 and a cylinder body 103, and the blade plate 102 is located at the connection between the seat body 101 and the cylinder body 103. The blade plate 102 can be circular, and the diameter of the blade plate 102 is larger than the inner diameter of the chimney 103. A step surface 107 is provided at the lower end of the connection between the seat body 101 and the cylinder body 103, so that the blade plate 102 rotating toward the smoke inlet end under gravity can be against the step surface 107. The diameter of the blade plate 102 is larger than the inner diameter of the chimney 103, so that the blade plate 102 can completely cut off the smoke channel, preventing smoke from flowing in the smoke channel through the blade plate 102.

[0074] In other embodiments, the fan blade plate 102 may not be circular, as long as the fan blade plate 102 can completely cover the smoke channel in the cylinder 103 .

[0075] The smoke passage can be placed in a connected state only by rotating the fan blade plate 102 toward the smoke exhaust end, so that the smoke at the smoke exhaust end can push the fan blade plate 102 to rotate toward the smoke inlet end, so that the fan blade plate 102 tightly presses against the connection between the seat body 101 and the cylinder body 103, so that the smoke passage is in a cut-off state, thereby preventing the smoke in the residential exhaust duct from entering the smoke inlet end through the smoke passage, that is, preventing the smoke from flowing back into the room.

[0076] In order to improve the smoke isolation effect of the blade plate 102, a sealing gasket, such as a rubber sealing ring, can be installed on the end surface of the blade plate 102 close to the cylinder 103. This is relatively mature in the prior art and will not be limited or elaborated here.

[0077] Regarding the hinged structure of the blade plate 102 and the baffle plate 204, in one embodiment, Figure 7 As shown, the mounting platform 201 is connected to the base 101, and the mounting platform 201 can be connected to the base 101 by bolts and nuts, so that the mounting platform 201 is detachable. The mounting platform 201 can also be connected to the base 101 by welding, or the mounting platform 201 can also be integrally formed with the base 201.

[0078] The baffle plate 204 is hinged to the mounting platform 201 through the first connecting shaft 202, and the blade plate 102 is hinged to the mounting platform 201 through the second connecting shaft 105. Figure 6 As shown, the first connecting shaft 202 is perpendicular to the second connecting shaft 105, and the central axis of the second connecting shaft 202 is parallel to the central axis of the cylinder 103. The first connecting shaft 202 is perpendicular to the second connecting shaft 105, so that when the baffle 204 is pressed against the blade plate 102, the force of the smoke on the blade plate 102 is transmitted to the baffle 204, and this force will not cause the baffle 204 to rotate, that is, the baffle 204 can press the blade plate 102 tightly.

[0079] Since the blade plate 102 is tilted and the radial space in the seat body 101 is limited, the size of the baffle plate 204 is limited. In order to allow the baffle plate 204 to be able to resist the blade plate 102 while being short, in this solution, Figure 6 As shown, one end of the baffle 204 is hinged to the mounting platform 201 through the first connecting shaft 202, and the other end thereof is provided with a bending portion 205, and the length extension direction of the bending portion 205 is parallel to the central axis of the cylinder 103, that is, the bending portion 205 extends axially, so that under the premise that the radial length of the baffle 204 is relatively short, the fan blade 102 can be supported by the bending portion 205.

[0080] The melting point of the temperature-sensitive material is 120° C. to 190° C., for example, 150° C. Various metals or alloys may be used, and other types of materials may also be used, which are not limited here.

[0081] Regarding the setting method of the temperature-sensitive material, in one embodiment, Figure 4 As shown, the baffle 204 is provided with an insert 301, and the mounting platform 201 is provided with a through hole 303 for the insert 301 to pass through. The insert 301 passing through the through hole 303 is installed with a stopper 302, and the stopper 302 abuts against the mounting platform 201, so that the insert 301 cannot exit the through hole 303, thereby fixing the baffle 204.

[0082] The stopper 302 is made of a temperature-sensitive material. Optionally, the temperature-sensitive material may be a tin alloy, and in this case, the stopper 302 may be made of the tin alloy in a columnar or block shape.

[0083] Regarding the setting method of the temperature-sensitive material, in another embodiment, as Figure 5 As shown, the mounting platform 201 is connected to a first connecting piece 401, the baffle 204 is connected to a second connecting piece 402, and the first connecting piece 401 and the second connecting piece 402 are connected by a temperature-sensitive material. Optionally, the temperature-sensitive material can be solder with a melting point of 150°C. When the temperature reaches the melting point of the solder, the solder melts, the first connecting piece 401 is disconnected from the second connecting piece 402, and the elastic member drives the baffle 204 to rotate until it abuts against the fan blade plate 102.

[0084] As for the elastic member, in one embodiment, the elastic member is a torsion spring 203, and the torsion spring 203 is installed on the first connecting shaft 202. The torsion spring 203 is provided with two extensions. Such a torsion spring 203 structure is relatively mature in the prior art and will not be described in detail here. The torsion spring 203 has two extensions, and the two extensions are respectively against the baffle 204 and the mounting platform 201. When the baffle 204 is in a locked state, the torsion spring 203 is in a torsion state; when the baffle 204 is unlocked, the torsion spring 203 applies elastic force to the baffle 204, and the baffle 204 rotates to abut against the fan blade plate 102, so that the fan blade plate 102 cannot be opened.

[0085] For the elastic member, in another embodiment, as Figure 8 As shown, the elastic member is a tension spring 206, and the two ends of the tension spring 206 are respectively connected to the baffle 204 and the mounting platform 201. When the baffle 204 is in a locked state, the tension spring 206 is in a stretched state; when the baffle 204 is unlocked, the tension spring 206 applies a pulling force to the baffle 204, and the baffle 204 rotates to abut against the fan blade plate 102, so that the fan blade plate 102 cannot be opened.

[0086] It should be noted that the tension spring 206 and the torsion spring 203 can also be installed at the same time, that is, after the baffle 204 is unlocked, the torsion spring 203 and the tension spring 206 work together to rotate the baffle 204 to abut against the fan blade plate 102, so that the fan blade plate 102 cannot be opened.

[0087] In order to improve the structural strength of the blade plate 102 and prevent the blade plate 102 from being deformed and causing the insulation effect to decrease, in one embodiment, Figure 1 , 3 As shown, the blade plate 102 is provided with an annular protrusion 106, so that the second connecting shaft 105 is connected to the annular protrusion 106 through the connecting plate 104. The annular protrusion 106 improves the overall structural strength of the blade plate 102, thereby preventing the blade plate 102 from being deformed.

[0088] In one embodiment, the present application provides a temperature sensing reaction device, including a motor 502 , a temperature sensing element, and a circuit board 503 .

[0089] The motor 502 is in transmission connection with the fan blade plate 102 to drive the fan blade plate 102 to rotate, so that the fan blade plate 102 is in an open state or a closed state.

[0090] The circuit board 503 is used to electrically connect with the range hood, the motor 502, and the temperature sensing element, and is used to determine whether the range hood is turned on. Note that the circuit board 503 determines whether the range hood is turned on, which is a method in the prior art and will not be described here. When the range hood is turned on, the motor 502 drives the fan blade plate 102 to rotate to the open state; when the range hood is turned off, the motor 502 drives the fan blade plate 102 to rotate to the closed state.

[0091] The temperature sensing element is electrically connected to the circuit board 503 and is used to detect the temperature. When the temperature reaches a set value, such as exceeding 120° C., the motor 102 can drive the fan blade 102 to rotate to a closed state.

[0092] The present invention also provides a fire-proof check valve, such as Fig. 9 As shown, it includes a valve body, a fan blade, a motor 502, a circuit board 503, and a temperature sensing element, wherein the valve body includes a seat body 101 and a cylinder body 103 connected to the seat body 101, and the seat body 101 and the cylinder body 103 are provided with a smoke channel, one end of the smoke channel is connected to an indoor smoke exhaust device, such as a smoke exhaust pipe of a range hood. The other end of the smoke channel is connected to a residential exhaust duct, and the smoke exhausted by the indoor smoke exhaust device passes through this fire check valve and then enters the residential exhaust duct for unified exhaust.

[0093] The fan blade plate 102 is arranged in the smoke passage, the smoke passage on one side of the fan blade plate 102 is the smoke inlet end, and the smoke passage on the other side is the smoke outlet end. The smoke inlet end is connected to the indoor smoke exhaust device, and the smoke exhausted by the indoor smoke exhaust device enters the smoke passage through the smoke inlet end. When the fan blade plate 102 is in an open state, that is, the smoke passage is in a connected state, the smoke enters the residential exhaust duct through the smoke outlet end.

[0094] The motor 502 is installed on the valve body, and the fan blade plate 102 can be driven to rotate by the motor 502, that is, the output shaft of the motor 502 is connected to the fan blade plate 102, so that when the motor 502 rotates forward or reverse, it can drive the fan blade plate 102 to open or close.

[0095] In this solution, the motor 502, the circuit board 503, and the temperature sensing element are all located above the smoke passage, so as to avoid the oil pollution accumulated below the smoke passage from polluting and damaging the motor 502, the circuit board 503, and the temperature sensing element. As a preferred solution, the motor 502 and the circuit board 503 are all arranged outside the valve body, and the temperature sensing element is arranged inside the smoke passage. The output shaft of the motor 502 passes through the through hole provided in the valve body and is then connected to the fan blade plate 102.

[0096] In order to prevent dust from affecting the motor 502 and the circuit board 503 , a cover 501 may be installed on the valve body, and the motor 502 and the circuit board 503 may be placed inside the cover 501 , so that the cover 501 protects the motor 502 and the circuit board 503 .

[0097] The circuit board 503 is electrically connected to the motor 502 to control the start and stop and the running time of the motor 502. The circuit board 503 is also electrically connected to the range hood to collect the working current of the range hood. The way in which the circuit board 503 implements the above control is relatively mature in the prior art and will not be repeated here.

[0098] When the range hood is turned on, that is, the range hood generates working current, the circuit board 503 controls the motor 502 to drive the fan blade plate 102 to rotate toward the smoke exhaust end, so that the smoke channel is in a connected state. When the range hood is turned off, the circuit board 503 does not collect the working current of the range hood. The circuit board 503 controls the motor 502 to drive the fan blade plate 102 to rotate toward the smoke inlet end, so that the smoke channel is in a cut-off state.

[0099] The temperature sensing element is electrically connected to the circuit board 503, and the temperature of the smoke passage is detected by the temperature sensing element. When a fire occurs, the temperature in the smoke passage rises, and the temperature sensing element detects the temperature rise in the smoke passage. When the collected temperature reaches a set value, for example, when the temperature in the smoke passage reaches 150°C, the motor 102 can drive the fan blade 102 to rotate toward the smoke inlet end, so that the smoke passage is in a cut-off state.

[0100] The upper end of the fan blade 102 is inclined toward the smoke inlet end, so that when the fan blade 102 is in a closed state, that is, the smoke channel is in a cut-off state, the influence of gravity on the fan blade 102 can be utilized to make the fan blade 102 stably in a closed state to avoid smoke leakage.

[0101] Optionally, a battery 504 is further provided under the cover 501, so that the circuit board 503, the motor 503 and the temperature sensing element can be powered by the battery 504. In this way, when a fire causes a power outage, the power of the battery 504 can still be used to close the fan blade 102.

[0102] As an optional solution, the fire check valve in the above embodiment also includes a pressure detector 505, which is installed in the smoke channel. The pressure detector 505 can detect the internal air pressure of the smoke channel. The pressure detector 505 can also be electrically connected to the circuit board 503, and the circuit board 503 is electrically connected to an indicator light. If the smoke exhaust effect is not good, the technician can judge the internal pressure of the smoke channel by the flashing frequency of the indicator light. For example, if the indicator light flashes 10 times in 10 seconds, it means that the internal pressure is greater than 1000Pa, and if the indicator light flashes once in 10 seconds, it means that the internal pressure is greater than 100Pa. In general, if the internal pressure of the smoke channel is greater than 300Pa, it is basically impossible to exhaust smoke. It can be seen that it is a pipeline problem, not a range hood problem, that is, the reason why smoke cannot be exhausted can be simply judged by the indicator light.

[0103] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A temperature sensing reaction device, characterized in that: It comprises a mounting platform (201), a baffle (204), an elastic member, and a temperature-sensitive material; in: The baffle (204) is located on one side of the mounting platform (201) and is hinged to the mounting platform (201); The baffle (204) is also connected to the mounting platform (201) via an elastic member, and is fixedly connected to the mounting platform (201) via a temperature-sensitive material; When the temperature rises to the melting point of the temperature-sensitive material, the temperature-sensitive material melts, and the elastic force of the elastic member causes the baffle (204) to rotate to an expanded state, and the baffle (204) abuts against the fan blade plate (102), so that the fan blade plate (102) remains in a closed state.

2. The temperature sensing device according to claim 1, characterized in that: The baffle (204) is provided with an insert (301); the mounting platform (201) is provided with a through hole (303) for the insert (301) to pass through; The insert (301) passing through the through hole (303) is installed with a stopper (302), and the stopper (302) abuts against the mounting platform (201); The stopper (302) is made of the temperature-sensitive material.

3. The temperature sensing reaction device according to claim 1, characterized in that: The mounting platform (201) is connected to a first connecting piece (401), and the baffle (204) is connected to a second connecting piece (402); The first connecting piece (401) and the second connecting piece (402) are connected via a temperature-sensitive material.

4. The temperature sensing reaction device according to claim 2 or 3, characterized in that: The temperature sensitive material has a melting point of 120°C to 190°C.

5. The temperature sensing device according to claim 1, characterized in that: The baffle (204) is hingedly connected to the mounting platform (201) via a first connecting shaft (202); The elastic member is a torsion spring (203), and the torsion spring (203) is sleeved on the first connecting shaft (202); two extensions of the torsion spring (203) are respectively against the baffle (204) and the mounting platform (201); and / or: The elastic member is a tension spring (206), and two ends of the tension spring (206) are respectively connected to the baffle (204) and the mounting platform (201).

6. A fire-proof check valve, characterized in that: include: A valve body, the valve body comprising a seat body (101) and a cylinder body (103) connected to the seat body (101), the seat body (101) and the cylinder body (103) being provided with a smoke passage; The fan blade plate (102) is arranged in the smoke passage; the smoke passage on one side of the fan blade plate (102) is a smoke inlet end, and the smoke passage on the other side is a smoke outlet end; The upper end of the blade plate (102) is inclined toward the smoke inlet end and is hinged to the valve body; the blade plate (102) can be pushed by the smoke to rotate toward the smoke outlet end, so that the smoke passage is in a connected state; or the blade plate (102) can be rotated toward the smoke inlet end under the force of gravity, so that the smoke passage is in a cut-off state; The upper part of the smoke exhaust end is provided with a temperature sensing reaction device as described in any one of claims 1 to 5; The mounting platform (201) is connected to the valve body; when the baffle (204) rotates to the unfolded state, the baffle (204) abuts against the fan blade plate (102), so that the smoke passage is in a cut-off state.

7. A temperature sensing reaction device, characterized in that: It includes a motor (502), a temperature sensing element, and a circuit board (503); in: The motor (502) is used for transmission connection with the fan blade plate (102) to drive the fan blade plate (102) to rotate to an open state or a closed state; The circuit board (503) is used to be electrically connected to the range hood, the motor (502), and the temperature sensing element, and is used to determine whether the range hood is turned on; when the range hood is turned on, the motor (502) drives the fan blade plate (102) to rotate to an open state; when the range hood is turned off, the motor (502) drives the fan blade plate (102) to rotate to a closed state; The temperature sensing element is electrically connected to the circuit board (503) and is used to detect the temperature; when the temperature exceeds 120°C, the motor (102) can drive the fan blade (102) to rotate to a closed state.

8. The temperature sensing reaction device according to claim 7, characterized in that: It also includes a storage battery (504), which is used to supply power to the circuit board (503), the motor (503) and the temperature sensing element.

9. A fire-proof check valve, characterized in that: include: A valve body, the valve body comprising a seat body (101) and a cylinder body (103) connected to the seat body (101), the seat body (101) and the cylinder body (103) being provided with a smoke channel; The fan blade plate (102) is arranged in the smoke passage; the smoke passage on one side of the fan blade plate (102) is a smoke inlet end, and the smoke passage on the other side is a smoke outlet end; the upper end of the fan blade plate (102) is inclined toward the smoke inlet end; The upper part of the smoke exhaust end is provided with a temperature sensing reaction device as described in any one of claims 7-8; The motor (502) is mounted on the valve body; When the motor (502) drives the fan blade plate (102) to rotate to an open state, the fan blade plate (102) rotates toward the smoke exhaust end, so that the smoke passage is in a connected state; When the motor (502) drives the fan blade plate (102) to rotate to a closed state, the fan blade plate (102) rotates toward the smoke inlet end, so that the smoke passage is in a cut-off state.

10. The fire-proof check valve according to claim 6, characterized in that: The fan blade (102) is hinged to the mounting platform (201) via a second connecting shaft (105); the central axis of the second connecting shaft (105) is perpendicular to the central axis of the first connecting shaft (202), and the central axis of the second connecting shaft (202) is parallel to the central axis of the cylinder (103).

11. The fire-proof check valve according to claim 6, characterized in that: A bending portion (205) is provided on one side of the baffle plate (204) close to the fan blade plate (102); the length extension direction of the bending portion (205) is substantially parallel to the central axis of the cylinder (103).

12. The fire-proof check valve according to claim 10, characterized in that: The fan blade (102) is provided with an annular protrusion (106); The second connecting shaft (105) is connected to the annular protrusion (106) via a connecting plate (104).

13. The fire check valve according to any one of claims 9, 10-12, characterized in that: The fan blade plate (102) is located at the connection between the seat body (101) and the cylinder body (103); The fan blade plate (102) is circular, and its diameter is larger than the inner diameter of the chimney (103).

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