Pyrolysis particle fire early warning device capable of avoiding influence of return air

Abstract

The pyrolysis particle fire early warning device capable of avoiding the return air influence comprises a shell, the shell comprises an air inlet shell body and an air outlet shell body located above the air inlet shell body, the air inlet shell body comprises an outer shell and a bottom plate located above the outer shell, a plurality of air inlets are formed in the outer shell, and a plurality of air outlets are formed in the bottom plate. The air outlet shell is a concave shell with an opening facing the bottom plate, a plurality of air outlets are formed in the air outlet shell, baffles are symmetrically arranged at the opening of the air outlet shell and extend outwards from the opening of the air outlet shell, and mounting seats corresponding to the baffles are symmetrically arranged at the two ends of the bottom plate. And the baffle plate and the mounting seat are fixed through a bolt.

Description

Technical Field

[0001] The utility model relates to the technical field of fire alarms, and in particular to a pyrolysis particle fire alarm capable of avoiding the influence of return air. Background Art

[0002] The heat generated in the early stage of a fire will cause the plastic surface of the wire to decompose due to heat, producing pyrolytic particles. The pyrolytic particle fire warning device is used to determine whether a fire will occur. Pyrolytic particles are particles that decompose when a substance is heated. This particle is the smallest material component that can exist in a free state. This scene can be used to detect the early characteristics of electrical fires. Regardless of the cause of an electrical fire, it is manifested as the heating of the conductor. The main heating elements of electrical faults in low-voltage distribution cabinets are wires and protective electrical appliances. Therefore, the particles decomposed by heat in low-voltage distribution cabinets are mainly smoke particles and gas particles.

[0003] Since the pyrolytic particle fire alarm is installed in a distribution cabinet, the volume of the pyrolytic particle fire alarm is generally small. The current pyrolytic particle fire alarm does not take into account that when the suction fan inhales the detection air through the air inlet, if the installation positions of the air inlet and the air outlet are close, the air inlet may be affected by the return air, resulting in inaccurate detection of the pyrolytic particle fire alarm. Utility Model Content

[0004] The purpose of the utility model is to provide a pyrolytic particle fire warning device that can avoid the influence of return air. A baffle is used to isolate the airflow of the air inlet from the air flow of the air outlet, so that the detection air in the air inlet channel connected to the air inlet is not affected by the air outlet, thereby improving the detection accuracy of the pyrolytic particle fire warning device.

[0005] In order to solve the above technical problems, the utility model adopts the following solutions:

[0006] A pyrolytic particle fire alarm that can avoid the influence of return air, comprises a shell, the shell comprises an air inlet shell and an air outlet shell located above the air inlet shell, the air inlet shell comprises an outer shell, a bottom plate located above the outer shell, the outer shell is provided with a plurality of air inlets, the air outlet shell is a concave shell with an opening toward the bottom plate, the air outlet shell is provided with a plurality of air outlets, and baffles parallel to the bottom plate are symmetrically arranged at the opening of the air outlet shell, the baffles extend outward from the opening of the air outlet shell, mounting seats corresponding to the baffles are symmetrically arranged at both ends of the bottom plate, and the baffles are fixed to the mounting seats by bolts.

[0007] Preferably, an air guide hood is provided in the air outlet shell, and the air guide hood includes a pyrolysis particle detector. The lower end of the air guide hood is provided with an air inlet channel, and the air inlet channel is connected to the bottom plate. The upper end of the air guide hood is provided with an air outlet channel, and the air outlet channel is connected to the corresponding air outlet.

[0008] Preferably, the base plate is provided with a through hole corresponding to the air inlet channel, the upper end of the inner wall of the air inlet channel is connected to the inner wall of the air guide cover, the air inlet channel is connected to the through hole, and the lower end of the outer wall of the air inlet channel is connected to the lower surface of the base plate.

[0009] Preferably, a suction fan facing the housing is disposed on the lower surface of the base plate, and the suction fan is used to suck the detection air through the air inlet by rotating itself.

[0010] Preferably, the shell is an arc-shaped shell, and both ends of the arc-shaped shell are fixedly connected to the bottom plate.

[0011] Preferably, the shell comprises a first shell and a second shell located on the inner side of the first shell, the first shell is provided with a plurality of air inlets, and the second shell is provided with a filter layer.

[0012] Preferably, the air inlet includes an upper opening, a lower opening, and a channel connecting the upper opening and the lower opening, the lower opening is connected to the outer side of the first shell, the upper opening is connected to the inner side of the first shell and is connected to the second shell, and the area of ​​the upper opening is smaller than the area of ​​the lower opening.

[0013] Preferably, a blade is provided on the inner side of the air outlet, a clamping block is provided on one side of the blade, the clamping block is welded to the inner side of the air outlet, and the clamping block is clamped on the inner side of the top of the blade.

[0014] Preferably, a driving motor is fixedly provided at the lower end of the base plate, and an output end of the driving motor is connected to the suction fan.

[0015] Beneficial effects of the utility model:

[0016] The utility model provides a pyrolytic particle fire alarm which can avoid the influence of return air. A baffle is used to isolate the airflow of an air inlet from the airflow of an air outlet, so that the detection air in an air inlet channel connected to the air inlet is not affected by the air outlet, thereby improving the detection accuracy of the pyrolytic particle fire alarm.

[0017] Specifically, the pyrolysis particle detector is arranged in an air guide hood, the air guide hood extends downward to form an air inlet channel, and the air inlet channel is connected to the air inlet, the air guide hood extends upward to form an air outlet channel, and the air outlet channel is connected to the air outlet, the air inlet channel and the air outlet channel are separated by the pyrolysis particle detector, and the air inlet channel uses a suction fan to suck the detection air from the air inlet, according to the flow of airflow, the detection air flows into the pyrolysis particle detector for detection, and then flows out through the air outlet channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0019] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0020] Explanation of the reference numerals: 1-air outlet housing, 2-air inlet housing, 21-housing, 211-first housing, 212-second housing, 22-bottom plate, 3-baffle, 4-air guide hood, 5-air inlet channel, 6-air outlet channel, 7-suction fan, 8-pyrolysis particle detector. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the implementation methods of the present invention are not limited thereto.

[0022] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The present invention is described in detail below with reference to the accompanying drawings and in combination with embodiments:

[0025] Example 1

[0026] The heat generated in the early stage of a fire will cause the plastic surface of the wire to decompose due to heat, producing pyrolytic particles. The pyrolytic particle fire warning device is used to determine whether a fire will occur. Pyrolytic particles are particles that decompose when a substance is heated. This particle is the smallest material component that can exist in a free state. This scene can be used to detect the early characteristics of electrical fires. Regardless of the cause of an electrical fire, it is manifested as the heating of the conductor. The main heating elements of electrical faults in low-voltage distribution cabinets are wires and protective electrical appliances. Therefore, the particles decomposed by heat in low-voltage distribution cabinets are mainly smoke particles and gas particles.

[0027] Since the pyrolytic particle fire alarm is installed in the power distribution cabinet, the volume of the pyrolytic particle fire alarm is generally small. The current pyrolytic particle fire alarm does not take into account that when the suction fan 7 inhales the detection air through the air inlet, if the installation positions of the air inlet and the air outlet are close, the air inlet may be affected by the return air, resulting in inaccurate detection of the pyrolytic particle fire alarm.

[0028] Therefore, the utility model provides a pyrolytic particle fire alarm that can avoid the influence of return air. The baffle 3 is used to isolate the airflow at the air inlet from the air flow at the air outlet, so that the detection air in the air inlet channel 5 connected to the air inlet is not affected by the air outlet, thereby improving the detection accuracy of the pyrolytic particle fire alarm.

[0029] Specifically, Figure 1 As shown, a pyrolytic particle fire alarm that can avoid the influence of return air includes a shell, the shell includes an air inlet shell 2 and an air outlet shell 1 located above the air inlet shell 2, the air inlet shell 2 includes an outer shell 21, a bottom plate 22 located above the outer shell 21, the outer shell 21 is provided with a plurality of air inlets, the air outlet shell 1 is a concave shell with an opening toward the bottom plate 22, the air outlet shell 1 is provided with a plurality of air outlets, and a baffle 3 parallel to the bottom plate 22 is symmetrically arranged at the opening of the air outlet shell 1, the baffle 3 extends outward from the opening of the air outlet shell 1, and mounting seats corresponding to the baffle 3 are symmetrically arranged at both ends of the bottom plate 22, and the baffle 3 is fixed to the mounting seat by bolts.

[0030] Preferably, an air guide hood 4 is provided in the air outlet shell 1, and the air guide hood 4 includes a pyrolysis particle detector 8. An air inlet channel 5 is provided at the lower end of the air guide hood 4, and the air inlet channel 5 is connected to the bottom plate 22. An air outlet channel 6 is provided at the upper end of the air guide hood 4, and the air outlet channel 6 is connected to the corresponding air outlet.

[0031] Preferably, the base plate 22 is provided with a through hole corresponding to the air inlet channel 5, the upper end of the inner wall of the air inlet channel 5 is connected to the inner wall of the air guide cover 4, the air inlet channel 5 is connected to the through hole, and the lower end of the outer wall of the air inlet channel 5 is connected to the lower surface of the base plate 22.

[0032] Preferably, a suction fan 7 facing the housing 21 is provided on the lower surface of the bottom plate 22, and the suction fan 7 is used to suck the detection air from the air inlet by rotating itself. In addition, a driving motor is fixedly provided at the lower end of the bottom plate 22, and the output end of the driving motor is connected to the suction fan 7.

[0033] Preferably, a blade is provided on the inner side of the air outlet, a clamping block is provided on one side of the blade, the clamping block is welded to the inner side of the air outlet, and the clamping block is clamped on the inner side of the top of the blade.

[0034] Preferably, the housing 21 is an arc-shaped housing 21, and both ends of the arc-shaped housing 21 are fixedly connected to the bottom plate 22. The purpose is that the arc-shaped housing 21 can inhale air from multiple directions, so that the air inhalation effect is better, and both ends of the arc-shaped housing 21 are fixedly connected to the bottom plate 22, and the arc-shaped housing 21 and the bottom plate 22 can be integrally formed, wherein the bottom plate 22 extends toward the outside of the arc-shaped housing 21, and the length of the bottom plate 22 is greater than the maximum diameter of the arc-shaped housing 21.

[0035] Specifically, a through hole is provided on the bottom plate 22. When the through hole is aligned with the air inlet channel 5, the bottom plate 22 is parallel to the baffle 3, and the bottom plate 22 is located below the baffle 3. The bottom plate 22 and the baffle 3 can be fixed by fixing tools such as bolts to connect the air outlet shell 1 and the air inlet shell 2. The detection air sucked into the air inlet shell 2 flows into the air guide hood 4 in the air outlet shell 1 through the airflow of the air inlet shell 2, so that the pyrolysis particle detector 8 in the air guide hood 4 detects the detection air, and the detected air flows into the air outlet channel 6, and then the detected air is discharged through the air outlet. The discharged air is not easily sucked into the air inlet quickly due to the action of the baffle 3, and will not affect the detection result of the pyrolysis particle detector 8.

[0036] In order to reduce the mutual influence of different air between the air inlet and the air outlet, the utility model sets the air inlet at the lower end of the air inlet shell 2, and sets the air outlet at the upper end of the air outlet shell 1, and the outer sides of the air outlet shell 1 and the air inlet shell 2 are isolated by a baffle 3.

[0037] Preferably, a blade is provided on the inner side of the air outlet, a clamping block is provided on one side of the blade, the clamping block is welded to the inner side of the air outlet, and the clamping block is clamped on the inner side of the top of the blade.

[0038] Specifically, the top of the blade is installed on the top of the inner side of the air outlet through a rotating shaft, and the bottom of the blade passes through the air outlet and extends to the outside of the air outlet. When the fan starts to inhale air, the air flows into the air outlet channel 6 through the air inlet channel 5 and then flows out from the air outlet. Due to the push of the air, the blade is rotated outward to discharge the air and prevent dust from entering from the air inlet, thereby ensuring the cleanliness of the pyrolytic particle fire alarm and ensuring the sensing work of the pyrolytic particle fire alarm for smoke.

[0039] Example 2

[0040] Based on Example 1, Figure 2 As shown, in this embodiment, the shell 21 includes a first shell 211 and a second shell 212 located on the inner side of the first shell 211 . The first shell 211 is provided with a plurality of air inlets, and the second shell 212 is provided with a filter layer.

[0041] Preferably, the air inlet includes an upper opening, a lower opening, and a channel connecting the upper opening and the lower opening, the lower opening is connected to the outer side of the first shell 211, the upper opening is connected to the inner side of the first shell 211, and is connected to the second shell 212, and the area of ​​the upper opening is smaller than the area of ​​the lower opening.

[0042] Specifically, this embodiment adopts a double-layer design for the air inlet shell 2 to reduce the amount of dust sucked in. The suction fan 7 located in the air inlet shell 2 can reduce the amount of dust sucked in while sucking in the detection air, thereby preventing excessive dust from accumulating on the suction fan 7 and affecting the use of the pyrolytic particle fire alarm.

[0043] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A pyrolysis particle fire warning device that can avoid the influence of return air, characterized in that: The invention comprises a shell, wherein the shell comprises an air inlet shell (2) and an air outlet shell (1) located above the air inlet shell (2); the air inlet shell (2) comprises an outer shell (21) and a bottom plate (22) located above the outer shell (21); the outer shell (21) is provided with a plurality of air inlets; the air outlet shell (1) is a concave shell with an opening facing the bottom plate (22); the air outlet shell (1) is provided with a plurality of air outlets; a baffle (3) parallel to the bottom plate (22) is symmetrically arranged at the opening of the air outlet shell (1); the baffle (3) extends outward from the opening of the air outlet shell (1); mounting seats corresponding to the baffle (3) are symmetrically arranged at both ends of the bottom plate (22); the baffle (3) is fixed to the mounting seat by bolts.

2. A pyrolytic particle fire warning device capable of avoiding the influence of return air according to claim 1, characterized in that: An air guide hood (4) is provided in the air outlet housing (1), and a pyrolysis particle detector (8) is included in the air guide hood (4). An air inlet channel (5) is provided at the lower end of the air guide hood (4), and the air inlet channel (5) is connected to the bottom plate (22). An air outlet channel (6) is provided at the upper end of the air guide hood (4), and the air outlet channel (6) is connected to the corresponding air outlet.

3. A pyrolytic particle fire warning device capable of avoiding the influence of return air according to claim 2, characterized in that: The bottom plate (22) is provided with a through hole corresponding to the air inlet channel (5); the upper end of the inner wall of the air inlet channel (5) is connected to the inner wall of the air guide cover (4); the air inlet channel (5) is connected to the through hole; and the lower end of the outer wall of the air inlet channel (5) is connected to the lower surface of the bottom plate (22).

4. A pyrolytic particle fire warning device capable of avoiding the influence of return air according to claim 1, characterized in that: The lower surface of the bottom plate (22) is provided with a suction fan (7) facing the outer shell (21), and the suction fan (7) is used to suck the detection air from the air inlet through its own rotation.

5. The pyrolytic particle fire warning device capable of avoiding the influence of return air according to claim 1, characterized in that: The outer shell (21) is an arc-shaped outer shell (21), and both ends of the arc-shaped outer shell (21) are fixedly connected to the bottom plate (22).

6. A pyrolytic particle fire warning device capable of avoiding the influence of return air according to claim 5, characterized in that: The housing (21) comprises a first housing (211) and a second housing (212) located on the inner side of the first housing (211); the first housing (211) is provided with a plurality of air inlets, and the second housing (212) is provided with a filter layer.

7. A pyrolytic particle fire warning device capable of avoiding the influence of return air according to claim 6, characterized in that: The air inlet comprises an upper opening, a lower opening, and a passage connecting the upper opening and the lower opening, the lower opening being connected to the outer side of the first shell (211), the upper opening being connected to the inner side of the first shell (211), and being connected to the second shell (212), and the area of ​​the upper opening being smaller than the area of ​​the lower opening.

8. The pyrolytic particle fire warning device capable of avoiding the influence of return air according to claim 1, characterized in that: A blade is arranged on the inner side of the air outlet, a clamping block is arranged on one side of the blade, the clamping block is welded on the inner side of the air outlet, and the clamping block is clamped on the inner side of the top of the blade.

9. A pyrolytic particle fire warning device capable of avoiding the influence of return air according to claim 4, characterized in that: A driving motor is fixedly arranged at the lower end of the bottom plate (22), and an output end of the driving motor is connected to the suction fan (7).

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