Electric fireproof valve and central smoke exhaust device

Abstract

The utility model relates to the technical field of smoke exhaust, in particular to an electric fireproof valve and a central smoke exhaust device. The electric fireproof valve comprises a valve body, a valve rod and a valve rod, the valve plate is movably arranged in the valve body and is connected with the opening part in an opening and closing manner; the fusible fireproof assembly comprises a pull rod, a guide rail and a fusible piece. One end of the fusible link is fixedly connected with the valve body; the other end of the fusible link is fixedly connected with the pull rod; the pull rod is slidably connected with the guide rail; when the temperature in the valve body reaches the fusing temperature state of the fusible link, the fusible link is fused, then the pull rod is separated from the fusible link and slides along the guide rail, and then the valve block is driven to move to abut against the opening part in a closed mode. Furthermore, when the temperature in the valve body reaches the fusing temperature of the fusible link, the pull rod is separated from the fusible link, and under the action of the pull rod, the valve plate is closed and propped against the opening part, so that the sealing performance of the valve plate in the case of power failure is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of smoke exhaust, and in particular to an electric fire damper and a central smoke exhaust device. Background Art

[0002] In the prior art, electric fire dampers with motors are often used as flue fire protection devices. In the event of a fire in the flue, the fire in the flue can be blocked from spreading from the pipeline to other non-fire areas by controlling the closure of the valve plate in the electric fire damper.

[0003] Because in the event of a fire, power transmission will be affected, causing a sudden power outage in the electric fire damper, making the motor-driven valve movement fail. The application reliability of the electric fire damper is reduced, resulting in the valve being unable to be effectively closed at the valve mouth, which in turn causes the fire to spread, posing a safety hazard.

[0004] Therefore, it is necessary to provide an improved electric fire damper to solve at least one of the above-mentioned problems in the prior art. Utility Model Content

[0005] In order to solve the problems existing in the above-mentioned prior art, the present application provides an electric fire damper, comprising a valve body, an opening portion is provided inside the valve body; a valve plate, the valve plate is movably arranged inside the valve body and is openably connected to the opening portion; a fusible fire protection assembly, comprising a pull rod, a guide rail and a fusible element; one end of the fusible element is fixedly connected to the valve body; the other end of the fusible element is fixedly connected to the pull rod; the pull rod is slidably connected to the guide rail;

[0006] When the temperature inside the valve body reaches the fusing temperature of the fusible element, the fusible element melts, and then the pull rod separates from the fusible element and slides along the guide rail, thereby driving the valve plate to move to close and abut against the opening.

[0007] Furthermore, the fusible fire protection assembly also includes a first elastic member; one end of the first elastic member is fixedly connected to the pull rod, and the other end of the first elastic member is fixed to the valve body; when the temperature inside the valve body does not reach the fusing temperature of the fusible member, the first elastic member is in a pre-tightened state.

[0008] Furthermore, the fusible fire protection assembly also includes a fusible fixing piece; the fusible fixing piece is fixed on the guide rail; when the temperature inside the valve body does not reach the fusing temperature of the fusible piece, the fusible piece is fixedly connected to the fusible fixing piece.

[0009] Furthermore, the electric fire damper further comprises a driving shaft and a driving motor; the driving motor is drivingly connected to the driving shaft, and the driving shaft is fixedly connected to the valve plate;

[0010] When the temperature inside the valve body does not reach the fusing temperature of the fusible fireproof component, the driving motor can drive the driving shaft to rotate, thereby driving the valve plate to move, so as to adjust the locking angle of the valve plate relative to the opening.

[0011] Furthermore, the electric fire damper also includes a rotating connection member; one end of the rotating connection member is fixedly connected to the driving shaft, and the other end of the rotating connection member is fixedly connected to the valve plate.

[0012] Furthermore, the electric fire damper also includes a shaft support; the shaft support is fixedly arranged on the valve body; a shaft support hole is arranged on the shaft support, and the driving shaft is movably connected to the shaft support hole.

[0013] Furthermore, the electric fire damper also includes a fixed stopper and a second elastic member; the fixed stopper is arranged at one side of the abutting end of the driving shaft and is fixedly connected to the valve body; the second elastic member is sleeved on the driving shaft, and the second elastic member is arranged between the abutting end of the driving shaft and the shaft support member; the fusible fire protection assembly also includes a closed stopper, one end of which is fixedly arranged on the pull rod, and the other end of the closed stopper can be arranged between the abutting end of the fixed stopper and the driving shaft, and respectively abut with the abutting end of the fixed stopper and the driving shaft; the second elastic member is in a pre-tightened state;

[0014] After the pull rod is separated from the fuse fixing member, the pull rod can drive the closing stopper to move to the abutment end that is separated from the fixing stopper and the driving shaft, so that the second elastic member drives the driving shaft to separate from the motor.

[0015] Furthermore, a slideway is provided on the guide rail, a sliding section and a buffer section are provided on the slideway, the buffer section is connected to the end of the sliding section, and a curved structure is formed between the sliding section and the buffer section.

[0016] Furthermore, the opening portion has an abutment inclined surface, and the abutment inclined surface interferes with the sliding plane of the pull rod.

[0017] The present application also discloses a central smoke exhaust device, comprising a smoke exhaust machine body, a smoke exhaust passage and an electric fire damper as described above;

[0018] The smoke exhaust port of the range hood body is connected to the smoke exhaust passage, and the electric fire damper is arranged in the smoke exhaust passage.

[0019] The electric fire damper provided in this application has at least the following beneficial effects:

[0020] In the present application, one end of the fusible link is fixedly connected to the valve body, and the other end is fixedly connected to the pull rod, and the pull rod is slidably connected to the guide rail; when the temperature inside the valve body reaches the melting temperature of the fusible link, the fusible link melts, and then the pull rod is separated from the fusible link and slides along the guide rail, and then under the action of the pull rod, the valve plate and the opening are driven to close and abut, thereby improving the tightness of the closure of the valve plate and the opening, so that when a fire occurs and the electric fire damper is powered off, the ventilation duct can be blocked in time to prevent smoke and fire from spreading to other areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the overall structure of an electric fire damper provided in an embodiment of the present application;

[0023] Figure 2 Schematic diagram of a part of the structure of the electric fire damper provided in the embodiment of the present application

[0024] Figure 3 A schematic diagram of a valve plate in an open state provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of a blown state of a fusible element provided in an embodiment of the present application;

[0026] Among them, the reference numerals in the figure correspond to:

[0027] 1-valve body, 2-valve plate, 4-driving shaft, 5-driving motor, 6-rotating connecting member, 7-shaft supporting member, 8-fixed stopper, 9-second elastic member, 11-opening portion, 12-bottom plate, 31-pull rod, 32-fusible member, 33-guide rail, 34-first elastic member, 35-fusible fixing member, 36-closing stopper, 37-fusible connecting member. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0030] The embodiments are described below with reference to the accompanying drawings, which do not limit the application contents described in the claims in any way.

[0031] This specification provides method operation steps such as embodiments or flow charts, but more or fewer operation steps may be included based on routine or non-creative work. The order of steps listed in the embodiments is only one way of executing the steps among many orders, and does not represent the only order of execution.

[0032] Please refer to Figure 1-4 The embodiment of the present application provides an electric fire damper, including a valve body 1, a valve disc 2 and a fusible fire protection assembly; an opening portion 11 is provided inside the valve body 1, and the valve disc 2 is movably arranged inside the valve body 1 and is openably connected to the opening portion 11; the fusible fire protection assembly includes a pull rod 31, a guide rail 33 and a fusible component 32; one end of the fusible component 32 is fixedly connected to the valve body 1; the other end of the fusible component 32 is fixedly connected to the pull rod 31; the pull rod 31 is slidably connected to the guide rail 33; when the temperature inside the valve body 1 reaches the fusing temperature of the fusible component 32, the fusible component 32 melts, and then the pull rod 31 is separated from the fusible component 32, and slides along the guide rail 33, thereby driving the valve disc 2 to move until it is closed and abuts against the opening portion 11.

[0033] In this way, in the present application, one end of the fusible link 32 is fixedly connected to the valve body 1, and the other end is fixedly connected to the pull rod 31, and the pull rod 31 is slidably connected to the guide rail 33; when the temperature in the valve body 1 reaches the melting temperature of the fusible link 32, the fusible link 32 melts, and then the pull rod 31 is separated from the fusible link 32 and slides along the guide rail 33, and then under the action of the pull rod 31, the valve plate 2 is driven to close and abut against the opening 11, thereby improving the tightness of the closure of the valve plate 2 and the opening 11, so that when a fire occurs and the electric fire damper is powered off, the ventilation duct can be blocked in time to prevent smoke and fire from spreading to other areas.

[0034] Specifically, Figure 2 As shown, the valve body 1 may be a shell structure with an inner cavity, including a bottom plate 12, on which an opening 11 is provided. The shape of the opening 11 is adapted to the valve plate 2, and the opening 11 protrudes toward one side of the inner cavity.

[0035] Specifically, the valve body 1 and the bottom plate 12 may be an integral structure.

[0036] Specifically, the valve plate 2 may be a disc-shaped structure, and similarly, the opening 11 may also be a circular structure.

[0037] Specifically, the fusible fireproof assembly includes two guide rails 33 , which are respectively longitudinally arranged at both ends of the pull rod 31 , and the two guide rails 33 are fixed on the bottom plate 12 of the valve body 1 , thereby ensuring the smooth sliding of the pull rod 31 along the guide rails 33 .

[0038] In some embodiments, the fusible fire protection assembly also includes a first elastic member 34; one end of the first elastic member 34 is fixedly connected to the pull rod 31, and the other end of the first elastic member 34 is fixed on the valve body 1; when the temperature inside the valve body 1 does not reach the fusing temperature of the fusible piece 32, the first elastic member 34 is in a pre-tightened state.

[0039] Specifically, the fusible fireproof assembly may include two first elastic members 34, which are respectively arranged on both sides of the pull rod 31, one end of the first elastic member 34 is fixedly connected to the pull rod 31, and the other end of the first elastic member 34 is fixed on the bottom plate 12 of the valve body 1.

[0040] Specifically, the first elastic member 34 may be a tension spring.

[0041] In this embodiment, one end of the first elastic member 34 is fixedly connected to the pull rod 31, and the other end of the first elastic member 34 is fixed on the valve body 1. When the fusible element 32 is not blown, the first elastic member 34 is in a pre-tightened state. When the temperature in the valve body 1 reaches the blowing temperature of the fusible element 32, the fusible element 32 blows, and the pull rod 31 is separated from the fusible element 32. Then, under the pull of the elastic force of the first elastic member 34, the pull rod 31 can slide along the guide rail 33, thereby driving the valve plate 2 to move to close and abut with the opening 11, thereby ensuring the high efficiency and reliability of the engagement between the valve plate 2 and the opening 11.

[0042] In other embodiments, the fusible fireproof assembly may include a first elastic member 34, the two ends of which are respectively fixedly connected to the two ends of the pull rod 31, and the middle part of the first elastic member 34 is sleeved and abutted against the outer wall of the opening 11, so that the elastic tension on both sides of the pull rod 31 is the same, thereby ensuring that the pull rod 31 can slide smoothly along the guide rail 33, while improving the efficiency and reliability of the engagement between the valve plate 2 and the opening 11.

[0043] Specifically, a limiting protrusion can be provided on the outer wall of the opening portion 11, and then the middle part of the first elastic member 34 is sleeved and abutted against the outer wall of the opening portion 11, and the first elastic member 34 is also limitedly cooperated with the limiting protrusion. Through the limiting cooperation between the limiting protrusion and the first elastic member 34, the first elastic member 34 can be prevented from detaching from the opening portion 11, which affects the reliability of the first elastic member 34.

[0044] In some embodiments, the fusible fire protection assembly further includes a fusible fixing member 35 ; the fusible fixing member 35 is fixed on the guide rail 33 ; when the temperature inside the valve body 1 does not reach the fusing temperature of the fusible piece, the fusible element 32 is fixedly connected to the fusible fixing member 35 .

[0045] Specifically, two ends of the fuse fixing member 35 are fixed to the upper ends of the two guide rails 33 .

[0046] Specifically, a clamping structure is provided at the end of the guide rail 33 , and the fuse fixing piece 35 is clamped in the clamping structure, so as to facilitate the assembly of the fuse fixing piece 35 and the guide rail 33 .

[0047] Specifically, a fusible link 37 is fixedly disposed on the fusible fixing member 35 , and the other end of the fusible link 37 is fixedly connected to the fusible member 32 .

[0048] Specifically, the fuse link 37 is arranged in the middle of the fuse fixing part 35, the fusible part 32 and the fuse fixing part 35 can be welded and fixed, and the fusible part 32 can also be arranged in the middle of the pull rod 31, so that the pull rod 31 is evenly stressed, thereby improving the stability of the cooperation between the fusible part 32 and the pull rod 31.

[0049] Specifically, one end of the fusible element 32 that cooperates with the pull rod 31 may be provided with a hook structure, so that the pull rod 31 is hooked by the hook.

[0050] Specifically, in the fusible fire protection assembly, the fusible element 32 has the lowest melting point.

[0051] In some embodiments, the electric fire damper also includes a driving shaft 4 and a driving motor 5; the driving motor 5 is transmission-connected to the driving shaft 4, and the driving shaft 4 is fixedly connected to the valve plate 2; when the temperature inside the valve body 1 does not reach the fusing temperature of the fusible fire protection component, the driving motor 5 can drive the driving shaft 4 to rotate, thereby driving the valve plate 2 to move, so as to adjust the locking angle of the valve plate 2 relative to the opening 11.

[0052] Specifically, the driving motor 5 may be fixedly disposed on the bottom plate 12 of the valve body 1 .

[0053] Specifically, a control device may be further included, which is electrically connected to the drive motor 5, and can adjust the opening and closing angle of the valve plate 2 relative to the opening 11 by controlling the rotation angle of the drive motor 5 to drive the rotating shaft 4, thereby improving the degree of automation of the device.

[0054] In this embodiment, the driving motor 5 can drive the driving shaft 4 to rotate, and the driving shaft 4 is fixedly connected to the valve plate 2 . The locking angle of the valve plate 2 relative to the opening 11 can be adjusted by rotating the driving shaft 4 .

[0055] In some embodiments, the electric fire damper further includes a rotating connection member 6 ; one end of the rotating connection member 6 is fixedly connected to the driving shaft 4 , and the other end of the rotating connection member 6 is fixedly connected to the valve plate 2 .

[0056] Specifically, a rotating connection hole is provided on one end of the rotating connection member 6, and the rotating connection member 6 is sleeved on the driving shaft 4 through the rotating connection hole. A fixing hole is provided on the other end of the rotating connection member 6, and a connecting hole matching the fixing hole is provided on the valve plate 2. The valve plate 2 can be fixed to the rotating connection member 6 by bolts passing through the fixing hole and the connecting hole respectively.

[0057] In this embodiment, the valve plate 2 and the driving shaft 4 are relatively fixedly connected by rotating the connecting member 6, which optimizes the connection method between the valve plate 2 and the driving shaft 4, improves the connection reliability and convenience between the valve plate 2 and the driving shaft 4, and then adjusts the engagement angle of the valve plate 2 relative to the opening portion 11 by rotating the driving shaft 4.

[0058] In some embodiments, the electric fire damper further comprises a shaft support 7; the shaft support 7 is fixedly disposed on the valve body 1; a shaft support hole is disposed on the shaft support 7, and the driving shaft 4 is movably connected to the shaft support hole.

[0059] Specifically, the shaft support 7 can be fixedly connected to the bottom plate 12 of the valve body 1 .

[0060] Specifically, the rotating shaft support 7 can be fixed on the valve body 1 by bolt connection.

[0061] Specifically, the rotating shaft support 7 is arranged on one side of the power output end of the driving motor 5 .

[0062] In this embodiment, a shaft support member 7 is fixedly provided on the valve body 1, and shaft support holes are provided on both end sides of the shaft support member 7, so that the driving shaft 4 can be movably mounted in the shaft support hole, thereby providing a circumferential support force for the driving shaft 4 and improving the movement stability of the driving shaft 4.

[0063] In some embodiments, the electric fire damper also includes a fixed stopper 8 and a second elastic member 9; the fixed stopper 8 is arranged on one side of the abutting end of the driving shaft 4 and is fixedly connected to the valve body 1; the second elastic member 9 is sleeved on the driving shaft 4, and the second elastic member 9 is arranged between the abutting end of the driving shaft 4 and the shaft support 7; the fusible fire protection assembly also includes a closing stopper 36, one end of the closing stopper 36 is fixedly arranged on the pull rod 31, and the other end of the closing stopper 36 can be arranged between the abutting end of the fixed stopper 8 and the driving shaft 4, and respectively abut the abutting ends of the fixed stopper 8 and the driving shaft 4; the second elastic member 9 is in a pre-tightened state; after the pull rod 31 is separated from the fusible fixing member 35, the pull rod 31 can drive the closing stopper 36 to run to the abutting end that is disengaged from the fixed stopper 8 and the driving shaft 4, so that the second elastic member 9 drives the driving shaft 4 to disengage from the driving motor 5.

[0064] Specifically, the fixed stopper 8 is arranged at one side of the abutting end of the driving shaft 4 , and is fixedly connected to the bottom plate 12 of the valve body 1 .

[0065] Specifically, the abutting end of the driving shaft 4 has an abutting side wall of the second elastic member 9, the second elastic member 9 is sleeved on the driving shaft 4, and one end of the second elastic member 9 abuts on the abutting side wall, and the other end of the second elastic member 9 abuts on the shaft support 7.

[0066] Specifically, the second elastic member 9 may be a spring.

[0067] Specifically, a connecting hole is provided at one end of the closing stopper 36, which is sleeved on the pull rod 31 through the connecting hole. When the temperature inside the valve body 1 has not reached the melting temperature of the fusible element 32, the driving shaft 4 is transmission-connected to the driving motor 5, and the closing stopper 36 is arranged between the driving shaft 4 and the fixed stopper 8, and is respectively abutted against the driving shaft 4 and the fixed stopper 8.

[0068] Specifically, when the temperature inside the valve body 1 reaches the fusing temperature of the fusible component 32, the pull rod 31 separates from the fusing fixing component 35, thereby driving the closing block 36 to disengage from the abutting end of the fixed block 8 and the driving shaft 4. At the same time, the driving shaft 4 is driven to disengage from the driving motor 5 under the elastic force of the second elastic component 9.

[0069] In the present embodiment, by providing a second elastic member 9 on the abutting end of the driving shaft 4 and providing a closing stopper 36 on the pull rod 31, the valve plate 2 can be driven to move by the rotational connection between the driving motor 5 and the driving shaft 4 when the temperature in the valve body 1 has not reached the fusing temperature of the fusible link 32, thereby realizing the adjustment of the snap-fitting angle of the valve plate 2 relative to the opening 11; when the temperature in the valve body 1 reaches the fusing temperature of the fusible link 32, the pull rod 31 separates from the fusing fixing member 35, thereby driving the closing stopper 36 to disengage from the fixing stopper 8 and the abutting end of the driving shaft 4, and at the same time, the driving shaft 4 is in the second Under the elastic force of the elastic member 9, the driving shaft 4 is driven to separate from the driving motor 5, thereby eliminating the pre-tightening force retained by the driving motor 5 on the driving shaft 4 in the event of a fire and power outage, which causes the valve plate 2 to be unable to engage with the opening 11, thereby separating from the fixed stopper 8 and the abutting end of the driving shaft 4 through the closing stopper 36. At the same time, under the elastic force of the second elastic member 9, the driving shaft 4 is driven to separate from the driving motor 5, and the connecting force of the driving motor 5 on the driving shaft 4 is removed. Then, the closing stopper 36 is driven by the pull rod 31 to slide along the guide rail 33, thereby ensuring the sealing and reliability of the closed abutment between the valve plate 2 and the opening 11.

[0070] In some embodiments, a slideway is provided on the guide rail 33 , and a sliding section and a buffer section are provided on the slideway. The buffer section is connected to the end of the sliding section, and a curved structure is formed between the sliding section and the buffer section.

[0071] Specifically, the guide rails 33 are arranged on both sides of the pull rod 31 along the gravity direction, and a sliding section and a buffer section are connected and provided along the arrangement direction of the guide rails 33 .

[0072] In this embodiment, by arranging a sliding section and a buffer section on the guide rail 33, the stability of the pull rod 31 running on the guide rail 33 can be improved, and through the bending structure formed between the sliding section and the buffer section, the pull rod 31 moves along the sliding section through the bending structure to the end of the buffer section, thereby preventing the valve plate 2 from being pushed by the impact of the hot air of the fire, causing poor sealing between the valve plate 2 and the opening 11, thereby improving the reliability of the pull rod 31 in fastening the valve plate 2 and the opening 11.

[0073] In some embodiments, the opening portion 11 has an abutting inclined surface, and the abutting inclined surface interferes with the sliding plane of the pull rod 31 .

[0074] Specifically, the opening 11 has an abutting inclined surface that can ensure smooth rotation of the valve plate 2 relative to the opening 11 , thereby avoiding interference between the movement of the valve plate 2 and the opening 11 .

[0075] In this embodiment, an abutment slope is provided on the opening portion 11 to ensure the reliability of the buckling between the valve plate 2 and the opening portion 11. At the same time, the abutment slope interferes with the sliding plane of the pull rod 31, thereby improving the effectiveness of the abutment between the pull rod 31 and the valve plate 2, thereby improving the tightness and reliability of the buckling between the valve plate 2 and the opening portion 11.

[0076] In some embodiments, a central smoke exhaust device is also disclosed, including a range hood body, a smoke exhaust passage and the electric fire damper as described above; the smoke exhaust port of the range hood body is connected to the smoke exhaust passage, and the electric fire damper is arranged in the smoke exhaust passage.

[0077] Specifically, the valve body shell of the electric fire damper is fixedly connected in the smoke exhaust channel. The smoke exhaust channel is blocked by the snap-fit ​​connection between the valve plate 2 of the electric fire damper and the opening 11, thereby effectively preventing smoke and fire from spreading to other areas through the smoke exhaust channel.

[0078] In this embodiment, the electric fire damper is arranged in the smoke exhaust passage. In the event of a fire, when the temperature in the electric fire damper reaches the melting temperature of the fusible element, the fusible element melts, and then the pull rod separates from the fusible element and slides along the guide rail. Then, under the action of the pull rod, the valve plate is driven to close and abut against the opening, thereby improving the tightness of the closure of the valve plate and the opening. In this way, when a fire occurs and the electric fire damper is powered off, the ventilation duct can be blocked in time to prevent smoke and fire from spreading to other areas.

[0079] Embodiment 1

[0080] Please refer to Figure 1-4 The embodiment of the present application provides an electric fire damper, including a valve body 1, a valve disc 2 and a fusible fire protection assembly; an opening portion 11 is provided inside the valve body 1, and the valve disc 2 is movably arranged inside the valve body 1 and is openably connected to the opening portion 11; the fusible fire protection assembly includes a pull rod 31, a guide rail 33 and a fusible component 32; one end of the fusible component 32 is fixedly connected to the valve body 1; the other end of the fusible component 32 is fixedly connected to the pull rod 31; the pull rod 31 is slidably connected to the guide rail 33; when the temperature inside the valve body 1 reaches the fusing temperature of the fusible component 32, the fusible component 32 melts, and then the pull rod 31 is separated from the fusible component 32, and slides along the guide rail 33, thereby driving the valve disc 2 to move until it is closed and abuts against the opening portion 11.

[0081] The valve body 1 is a shell structure with an inner cavity, and the opening 11 protrudes toward one side of the inner cavity and is fixedly arranged on a bottom plate 12 of the valve body 1 .

[0082] When the temperature in the valve body 1 does not reach the melting temperature of the fusible element 32, the connection relationship of the various parts in the electric fire damper is as follows:

[0083] The driving motor 5 is also fixedly arranged on the bottom plate 12 , and a rotating shaft support 7 and a fixed stopper 8 are fixedly arranged in sequence along one side of the power output end of the driving motor 5 .

[0084] The shaft support member 7 is provided with a shaft support hole movably connected to the driving shaft 4 . One end of the driving shaft 4 can be transmission-connected to the driving motor 5 , and the abutting end of the driving shaft 4 abuts against the fixed stopper 8 .

[0085] The abutting end of the driving shaft 4 has an abutting side wall, and a spring with a preload force is arranged between the abutting side wall of the driving shaft 4 and the shaft support 7 .

[0086] The electric fire damper further comprises a rotating connecting member 6 , one end of which is fixedly connected to the driving shaft 4 , and the other end of which is fixedly connected to the valve plate 2 .

[0087] The fusible fireproof assembly also includes a tension spring, a fusible fixing 35, a closing stopper 36, a fusible connecting piece 37 and two guide rails 33. The two guide rails 33 are arranged at the two ends of the pull rod 31 and are fixed on the bottom plate 12. The two ends of the tension spring are respectively fixedly connected to the two ends of the pull rod 31. The middle part of the wax tension spring is sleeved and abutted on the outer wall of the opening 11, and the tension spring is in an extended state; the two ends of the fusible fixing 35 are correspondingly fixed to the upper ends of the two guide rails 33; one end of the closing stopper 36 is fixedly connected to the pull rod 31, and the other end of the closing stopper 36 is arranged between the abutting end of the drive shaft 4 and the fixed stopper 8, and abuts with the abutting end of the drive shaft 4 and the fixed stopper 8 respectively; one end of the fusible connecting piece 37 is welded to the fusible fixing piece 35, and the other end of the fusible connecting piece 37 is fixedly connected to the fusible piece 32.

[0088] One end of the fusible element 32 that cooperates with the pull rod 31 may be provided with a hook structure, and the pull rod 31 is hooked by the hook.

[0089] When the temperature inside the valve body 1 reaches the melting temperature of the fusible element 32, the fusible element 32 separates from the pull rod 31, and the pull rod 31 slides along the guide rail 33 under the pull of the tension spring elastic force, thereby driving the closing block 36 to disengage from the abutment end of the fixed block 8 and the driving shaft 4. At the same time, the driving shaft 4 is pushed toward the fixed block 8 under the action of the elastic force of the spring, thereby causing the driving shaft 4 to disengage from the driving motor 5.

[0090] Embodiment 2

[0091] The present application also discloses a central smoke exhaust device, comprising a smoke exhaust fan body, a smoke exhaust passage and the electric fire damper in the first embodiment, wherein the valve body shell of the electric fire damper is fixedly connected in the smoke exhaust passage.

[0092] It also includes a sensing device and a control device, and the control device is electrically connected to the sensing device, the range hood body and the electric fire damper respectively.

[0093] When the control device receives the startup information of the range hood body, it can control the startup of the electric fire damper and control the opening angle of the valve plate 2.

[0094] The sensing device is used to sense the blown state information of the fusible element 32 , and send the sensed blown state information of the fusible element 32 to the control device. The control device controls the action of the range hood body in response to the blown state information of the fusible element 32 .

[0095] Specifically, when the fuse status information of the fusible element 32 received by the sensing device is that the fusible element 32 is blown, the control device controls the range hood body to stop running in response to the fuse status information of the fusible element 32, and sends a fire alarm instruction to the user end; when the fuse status information of the fusible element 32 received by the sensing device is that the fusible element 32 is not blown, the control device controls the electric fire damper to work normally in response to the information that the fusible element 32 is not blown.

[0096] When the fusible element 32 is in the blown state, the movement process inside the electric fire damper is the same as that in the first embodiment, and will not be described in this embodiment.

[0097] The various embodiments in the present application are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0098] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An electric fire damper, characterized in that: include: A valve body (1), wherein an opening (11) is provided inside the valve body (1); A valve plate (2), the valve plate (2) being movably arranged inside the valve body (1) and being connected to the opening portion (11) in an openable and closable manner; A fusible fireproof assembly comprises a pull rod (31), a guide rail (33) and a fusible component (32); one end of the fusible component (32) is fixedly connected to the valve body (1); the other end of the fusible component (32) is fixedly connected to the pull rod (31); The pull rod (31) is slidably connected to the guide rail (33); When the temperature inside the valve body (1) reaches the melting temperature of the fusible component (32), the fusible component (32) melts, and then the pull rod (31) separates from the fusible component (32) and slides along the guide rail (33), thereby driving the valve plate (2) to move until it is closed and abuts against the opening (11).

2. The electric fire damper according to claim 1, characterized in that: The fusible fireproof assembly further comprises a first elastic member (34); One end of the first elastic member (34) is fixedly connected to the pull rod (31), and the other end of the first elastic member (34) is fixed to the valve body (1); When the temperature inside the valve body (1) has not reached the fusing temperature of the fusible element (32), the first elastic element (34) is in a pre-tightened state.

3. The electric fire damper according to claim 1, characterized in that: The fusible fireproof assembly also includes a fusible fixing member (35); The fuse fixing member (35) is fixed on the guide rail (33); When the temperature in the valve body (1) has not reached the fusing temperature of the fusible element (32), the fusible element (32) is fixedly connected to the fusing fixing element (35).

4. The electric fire damper according to claim 3, characterized in that: It also includes a driving shaft (4) and a driving motor (5); The driving motor (5) is drivingly connected to the driving shaft (4), and the driving shaft (4) is fixedly connected to the valve plate (2); When the temperature inside the valve body (1) does not reach the fusing temperature of the fusible element (32), the drive motor (5) can drive the drive shaft (4) to rotate, thereby driving the valve plate (2) to move, so as to adjust the locking angle of the valve plate (2) relative to the opening (11).

5. The electric fire damper according to claim 4, characterized in that: It also includes a rotating connection member (6); One end of the rotating connecting member (6) is fixedly connected to the driving shaft (4), and the other end of the rotating connecting member (6) is fixedly connected to the valve plate (2).

6. The electric fire damper according to claim 4, characterized in that: It also includes a rotating shaft support (7); The rotating shaft support (7) is fixedly arranged on the valve body (1); The rotating shaft support member (7) is provided with a rotating shaft support hole, and the driving rotating shaft (4) is movably connected to the rotating shaft support hole.

7. The electric fire damper according to claim 6, characterized in that: It also includes a fixed stopper (8) and a second elastic member (9); The fixed stopper (8) is arranged on one side of the abutting end of the driving shaft (4) and is fixedly connected to the valve body (1); The second elastic member (9) is sleeved on the driving shaft (4), and the second elastic member (9) is arranged between the abutting end of the driving shaft (4) and the shaft support member (7); The fusible fireproof assembly further comprises a closing stopper (36), one end of which is fixedly arranged on the pull rod (31), and the other end of which can be arranged between the abutting ends of the fixed stopper (8) and the driving shaft (4), and respectively abuts against the abutting ends of the fixed stopper (8) and the driving shaft (4); the second elastic member (9) is in a pre-tightened state; After the pull rod (31) is separated from the fuse fixing member (35), the pull rod (31) can drive the closing block member (36) to move to the abutment end that is separated from the fixing block member (8) and the driving shaft (4), so that the second elastic member (9) drives the driving shaft (4) to separate from the driving motor (5).

8. The electric fire damper according to any one of claims 1 to 7, characterized in that: The guide rail (33) is provided with a slideway, and the slideway is provided with a sliding section and a buffer section, the buffer section is connected to the end of the sliding section, and a curved structure is formed between the sliding section and the buffer section.

9. The electric fire damper according to any one of claims 1 to 7, characterized in that: The opening portion (11) has an abutment inclined surface, and the abutment inclined surface interferes with the sliding plane surface of the pull rod (31).

10. A central smoke exhaust device, characterized in that: It comprises a smoke exhaust fan body, a smoke exhaust channel and an electric fire damper as claimed in any one of claims 1 to 9; The smoke exhaust port of the range hood body is connected to the smoke exhaust passage, and the electric fire damper is arranged in the smoke exhaust passage.

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