Air-breathing smoke-sensing fire detector

Abstract

The utility model discloses an air-breathing smoke-sensing fire detector, relates to the technical field of fire detectors, and aims to solve the problems of small sampling range and short sampling distance of a current product. The pipeline partition assembly comprises a first shell and a plurality of branch pipes, a plurality of pipe joints are arranged on the first shell, the first shell is connected with the branch pipes through the pipe joints, and a plurality of valves in one-to-one correspondence with the pipe joints are arranged in the first shell; the air extraction assembly is communicated with the first shell and is used for extracting air in the first shell; and the detection assembly is used for detecting the concentration of smoke in the air extracted by the air extraction assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of fire detectors, in particular to an aspiration type smoke fire detector. Background Art

[0002] The suction type smoke detector has an exhaust device and a detection device inside. Its basic working process is to suck in the air in the environment, detect the sucked air with the detection device, and determine whether to alarm according to the smoke concentration in the air. The problems of the current products are: 1. The sampling range is small, the sampling distance is short, and each product can only detect one place; 2. The overall packaging requires complete disassembly in case of failure, and the maintenance cost is high. Summary of the invention

[0003] The utility model proposes an aspirating smoke fire detector, comprising:

[0004] A pipeline partition assembly, comprising a first shell and a plurality of branch pipes, wherein a plurality of pipe joints are arranged on the first shell and connected to each of the branch pipes through the pipe joints, and a plurality of valves corresponding to the pipe joints are arranged inside the first shell;

[0005] an exhaust assembly, connected to the first shell and used to extract air from the first shell;

[0006] The detection assembly is used to detect the smoke concentration in the air extracted by the exhaust assembly.

[0007] The utility model is further configured as follows: the air extraction assembly includes a second housing and an air pump;

[0008] The second shell includes a negative pressure chamber, a mounting groove and a positive pressure chamber arranged in sequence;

[0009] The air pump is arranged in the installation groove, and the air inlet end and the air outlet end of the air pump are respectively connected to the negative pressure chamber and the positive pressure chamber;

[0010] One end of the negative pressure chamber away from the air pump is connected to the first shell;

[0011] The positive pressure chamber is provided with an air outlet.

[0012] The utility model is further configured as follows: the detection assembly comprises a third shell, the third shell is connected to the negative pressure chamber and the positive pressure chamber, and a detection device for detecting smoke concentration is arranged in the third shell.

[0013] The utility model is further configured as follows: comprising a control board, the control board is detachably connected to the second shell, a processor is arranged on the control board, and the processor is electrically connected to the detection device and the valve.

[0014] The utility model is further configured as follows: the second shell is detachably connected to the first shell, and the third shell is detachably connected to the second shell.

[0015] The utility model is further configured as follows: a muffler is installed at the air outlet of the positive pressure chamber.

[0016] The beneficial effects of the utility model are:

[0017] 1. In the specific implementation, different branch pipes can be led to different positions, which increases the detection distance and detection range. Combined with the control of the valve, the air at different positions can be accurately detected.

[0018] 2. The functional parts are supported by the detachable first shell, second shell and third shell, so that the whole product becomes modular and can be disassembled independently, which greatly facilitates the inspection and maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0020] Figure 2 It is a cross-sectional view of the pipeline partition assembly in the utility model;

[0021] Figure 3 It is a three-dimensional structural diagram of the utility model with part of the third housing omitted;

[0022] Figure 4 It is a three-dimensional structural diagram of the second shell in the utility model.

[0023] Figure numerals: 1. Pipe partition assembly; 11. First shell; 12. Pipe joint; 13. Valve; 2. Exhaust assembly; 21. Negative pressure chamber; 22. Mounting groove; 23. Positive pressure chamber; 24. Air pump; 3. Detection assembly; 31. Third shell; 32. Photodiode; 33. Laser module; 4. Muffler; 5. Control board. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0025] See also Figure 1-4 The utility model provides an aspirating smoke fire detector, which includes a pipeline partition assembly 1, an exhaust assembly 2, a detection assembly 3 and a control panel 5.

[0026] The pipeline partition assembly 1 includes a first housing 11 and two branch pipes. Two pipe joints 12 are integrally arranged on the first housing 11, and are connected to each branch pipe through the pipe joints 12. Since the branch pipes can be arranged according to the on-site conditions, the branch pipes are not shown in the drawings. A plurality of valves 13 corresponding to the pipe joints 12 are arranged inside the first housing 11. By controlling each valve 13, the opening and closing of each branch pipe can be controlled. Through the branch pipes, the sampling position can be extended to different positions.

[0027] The exhaust assembly 2 includes a second shell and an air pump 24. The second shell includes a negative pressure chamber 21, a mounting groove 22 and a positive pressure chamber 23 which are arranged in sequence. The air pump 24 is arranged in the mounting groove 22, and the air inlet and air outlet of the air pump 24 are respectively connected to the negative pressure chamber 21 and the positive pressure chamber 23. When the air pump 24 is working, negative pressure is generated in the negative pressure chamber 21 and positive pressure is generated in the positive pressure chamber 23. At the same time, the end of the negative pressure chamber 21 away from the air pump 24 is connected to the first shell 11, so when the air pump 24 is working, air will be extracted from the conductive branch pipe, and the extracted air will pass through the first shell 11, the negative pressure chamber 21, and then be discharged into the positive pressure chamber 23 through the air pump 24. The positive pressure chamber 23 is provided with an air outlet, and the air is discharged from the air outlet under the action of positive pressure. A muffler 4 is installed at the air outlet of the positive pressure chamber 23 to reduce the noise when the product is running.

[0028] The detection assembly includes a third shell 31. The third shell 31 is connected to the negative pressure chamber 21 and the positive pressure chamber 23, and a detection device for detecting smoke concentration is arranged in the third shell 31. The detection device is a conventional product in this field, including a photodiode 32 and a laser module 33, which are used to detect the concentration of smoke in the air. When the air pump 24 is working, since the air pressure in the positive pressure chamber 23 is at positive pressure, and at the same time the air pressure in the negative pressure chamber 21 is at negative pressure, part of the air will enter the third shell 31 from the positive pressure chamber 23, and then be discharged into the negative pressure chamber 21. This setting introduces the extracted air into the third shell 31, so that the smoke concentration can be detected.

[0029] The second housing is detachably connected to the first housing 11 by means of a buckle, and the third housing 31 is detachably connected to the second housing by means of a bolt. The control panel 5 is detachably connected to the second housing by means of a bolt. The communication between the second housing and the first housing 11, and the communication between the third housing 31 and the second housing, are both achieved through relatively arranged air holes.

[0030] The control board 5 is provided with at least a processor and an alarm circuit, and the processor is electrically connected to the air pump 24, the photodiode 32, the laser module 33, the valve 13 and the alarm circuit. The processor controls the valve 13 on the one hand, and controls the alarm circuit according to the signals of the photodiode 32 and the laser module 33 on the other hand, and is also used to control the operation of the air pump 24. How to set the processor, as well as the fire alarm and other related contents are all prior art and are not related to the improvement points of this solution, so they are not described in detail.

[0031] The advantages of this solution are:

[0032] 1. In specific implementation, different branch pipes can be led to different positions, which increases the detection distance and detection range. Combined with the control of the valve 13, the air at different positions can be accurately detected. For example, two branch pipes are led to two different rooms respectively, and the smoke concentration in the two different rooms can be accurately detected by periodically opening and closing the valve 13.

[0033] 2. The functional components are supported by the detachable first shell 11, the second shell and the third shell 31, so that the whole product becomes modular and can be disassembled independently, which greatly facilitates the inspection and maintenance process.

[0034] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0035] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0037] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0038] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An aspirating smoke fire detector, characterized in that: include: A pipeline partition assembly (1) comprises a first shell (11) and a plurality of branch pipes, wherein the first shell (11) is provided with a plurality of pipe joints (12) connected to each of the branch pipes via the pipe joints (12), and the first shell (11) is provided with a plurality of valves (13) corresponding one to one with the pipe joints (12); An air extraction assembly (2) connected to the first shell (11) and used to extract air from the first shell (11); The detection assembly (3) is used to detect the concentration of smoke in the air extracted by the exhaust assembly (2).

2. The aspirating smoke fire detector according to claim 1, characterized in that: The air extraction assembly (2) comprises a second housing and an air pump (24); The second shell comprises a negative pressure chamber (21), a mounting groove (22) and a positive pressure chamber (23) which are arranged in sequence; The air pump (24) is arranged in the installation groove (22), and the air inlet end and the air outlet end of the air pump (24) are respectively connected to the negative pressure chamber (21) and the positive pressure chamber (23); One end of the negative pressure chamber (21) facing away from the air pump (24) is in communication with the first housing (11); The positive pressure chamber (23) is provided with an air outlet.

3. The aspirating smoke fire detector according to claim 2, characterized in that: The detection assembly (3) comprises a third shell (31), the third shell (31) is connected to the negative pressure chamber (21) and the positive pressure chamber (23), and a detection device for detecting smoke concentration is arranged in the third shell (31).

4. The aspirating smoke fire detector according to claim 3, characterized in that: It comprises a control panel (5), the control panel (5) being detachably connected to the second housing, the control panel (5) being provided with a processor, and the processor being electrically connected to the detection device and the valve (13).

5. The aspirating smoke fire detector according to claim 3, characterized in that: The second shell is detachably connected to the first shell (11), and the third shell (31) is detachably connected to the second shell.

6. The aspirating smoke fire detector according to claim 2, characterized in that: A silencer (4) is installed at the air outlet of the positive pressure chamber (23).

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