Device for judging water leakage of pipeline at hidden position of toilet

Abstract

The toilet hidden position pipeline water leakage judgment device comprises a transfer assembly, the transfer assembly comprises a conveying pipe, an air guide pipe and a soft spring, the air guide pipe is located in the conveying pipe, and an air hole used for fixedly installing an end opening of the air guide pipe is formed in the inner side wall of a detection section of the conveying pipe; the soft spring is arranged on the supporting section of the conveying pipe in a sleeving mode and used for driving the detection section to move in the pipeline body. Through cooperation of the transfer assembly, the cavity detection assembly, the air supply assembly and the position display assembly, the water leakage position of the pipeline body can be rapidly and effectively judged, the pipeline body is detected section by section, operation and control are more convenient and flexible, repeated demolition and decoration are effectively avoided, and the working efficiency is improved. The water leakage position of the pipeline can be quickly and accurately found, so that overhaul and maintenance can be efficiently completed through one-time dismantling, the dismantling area can be greatly reduced, unnecessary waste is avoided, the pipeline maintenance cost is greatly saved, and the maintenance and overhaul efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline detection, in particular to a device for judging water leakage in hidden pipelines in toilets. Background Art

[0002] The drainage pipes in traditional home bathrooms are usually buried in the walls or floors. The walls or floors where the pipes are laid are usually further decorated to maintain the beauty of the interior and meet usage needs, such as laying wall tiles, wooden boards, floor tiles, etc.

[0003] These pipes laid on the walls or the ground will suffer varying degrees of damage and leakage as time goes by and the walls or the ground change, requiring inspection and replacement.

[0004] However, since the pipes are hidden in the walls or on the ground, it is very inconvenient to inspect and find the leaks. It is often necessary to demolish a large area of ​​the ground or wall to find the leaks in the pipes for repair. What's more, if the leaks are not found after one demolition and renovation, it is necessary to expand the demolition area again to gradually find the leaks. This is not only cumbersome and troublesome, but also difficult to quickly and accurately find the leaks in the pipes. The maintenance efficiency is very low, and it also causes great damage to the interior decoration, resulting in unnecessary waste. In addition, the decoration needs to be restored after the repair, which results in a large pipeline maintenance cost, which is a large economic burden for ordinary families.

[0005] In the current prior art, a Chinese patent publication numbered CN113970414A discloses an underground pipeline leakage detection device and a detection method thereof, which detects pipeline leakage in municipal engineering projects through air bags and changes in air pressure.

[0006] However, the above technical solution still has at least the following defects: the drainage pipes used in households are significantly different from those in municipal engineering projects, and their pipe diameters are usually much smaller than those of municipal engineering pipes. The detection device of the above technical solution is difficult to apply to the detection of pipe leaks in household bathrooms, and household concealed pipes usually have multiple branches, making it more difficult to determine the leakage point. Utility Model Content

[0007] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a device for determining water leakage in hidden pipes in a bathroom, comprising:

[0008] A transfer assembly, the transfer assembly comprising a delivery pipe, an air guide pipe, and a soft spring. The air guide pipe is located inside the delivery pipe. An air hole for fixing and mounting a port of the air guide pipe is formed on the inner side wall of the detection section of the delivery pipe. The soft spring is sleeved on the support section of the delivery pipe and is used to drive the detection section to move within the pipeline body.

[0009] a cavity detection assembly, comprising two airbags, the two airbags being mounted oppositely at the two ends of the detection section and both being in communication with the interior of the delivery tube, the two airbags and the inner wall of the tube body being able to enclose a detection chamber;

[0010] An air supply component is connected to the delivery tube and the air guide tube respectively, and is used to supply air to the airbag and the detection chamber, and to display the air pressure changes in the airbag and the detection chamber.

[0011] Further preferably, the outer annular surfaces at both ends of the support segment are fixedly mounted with fixing seats, and the two ends of the soft spring are respectively fixedly connected to the corresponding fixing seats.

[0012] Further preferably, the outer annular surfaces at both ends of the detection section are fixedly mounted with a holder, the airbag is fixedly mounted on the holder, the inner bottom wall of the holder is formed with a mounting hole connected to the interior of the delivery tube, and the air inlet nozzle of the airbag extends into the interior of the delivery tube through the mounting hole.

[0013] Further preferably, there are a plurality of mounting holes, and the plurality of mounting holes are arranged in a circular array on the base.

[0014] Further preferably, there are several air inlet nozzles, and the several air inlet nozzles are correspondingly installed in the mounting holes.

[0015] Further preferably, a steering head is fixedly mounted on one end of the delivery pipe located at the detection section.

[0016] Further preferably, the air supply assembly includes a first air supply pipe and a second air supply pipe, the output end of the first air supply pipe is connected to the delivery pipe, the output end of the second air supply pipe extends from the side wall of the first air supply pipe into the first air supply pipe, and is connected to the air guide pipe, and the input ends of the first air supply pipe and the second air supply pipe are both connected to the air pump.

[0017] Further preferably, a first pressure gauge is fixedly installed on the first air supply pipe, and a second pressure gauge is fixedly installed on the second air supply pipe.

[0018] More preferably, it further comprises a position display component, which is used to display the position of the detection section in the hidden pipe body.

[0019] Further preferably, the position display component includes a miniature wireless remote control speaker, and the miniature wireless remote control speaker is fixedly mounted on the inner wall of the detection section.

[0020] Compared with the prior art, the utility model has an ingenious structure and is easy to operate. Through the cooperation of the transfer component, the cavity detection component, the air supply component and the display component, the leaking part of the pipeline body can be quickly and effectively judged, and the pipeline body can be inspected section by section. The operation is more convenient and flexible, and it is more suitable for the use of bathroom pipelines, effectively avoiding repeated demolition and renovation. The leaking part of the pipeline can be found quickly and accurately, so that the inspection and maintenance can be completed efficiently with one demolition. It can also greatly reduce the demolition area, avoid unnecessary waste, greatly save the cost of pipeline maintenance, improve the maintenance and inspection efficiency, better reduce the family's economic burden, and be more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of a toilet drainage system in the prior art.

[0022] Figure 2 It is a structural diagram of a bathroom in the prior art.

[0023] Figure 3 This is a schematic diagram of the axonometric structure of the conveying pipe of the present invention.

[0024] Figure 4 It is a schematic diagram of the axonometric cutaway structure of the conveying pipe of the present invention.

[0025] Figure 5 It is a schematic diagram of the top structure of the utility model.

[0026] Figure 6 It is a schematic diagram of the top view of the cross-section structure of the utility model.

[0027] Figure 7 It is a schematic structural diagram of the transfer component, cavity detection component and air supply component of the utility model.

[0028] Figure 8 It is a cutaway schematic diagram of the utility model when in use.

[0029] Explanation of the numbers in the schematic diagram:

[0030] 1. Delivery pipe; 101. Detection section; 102. Support section; 2. Air guide tube; 3. Soft spring; 4. Air hole; 5. Pipe body; 6. Air bag; 601. Air inlet nozzle; 7. Detection chamber; 8. Fixing seat; 9. Card seat; 10. Mounting hole; 11. Steering head; 12. First air supply pipe; 13. Second air supply pipe; 14. Air pump; 15. First air pressure gauge; 16. Second air pressure gauge; 17. Mini wireless remote control speaker. DETAILED DESCRIPTION

[0031] At present, the pipes in traditional family bathrooms are usually interconnected. For example, the Chinese patent with authorization announcement number CN205116304U discloses a bathroom drainage system, an integrated bathroom and a building. The main disclosure of the attached figure is as follows: Figure 1 As shown ( Figure 1 The numbers in the utility model have nothing to do with the numbers used in this utility model. The buried pipes in the indoor bathroom are connected in multiple branches, and there are connections between floors. They are usually separated by multiple pipe valves. Furthermore, the current bathroom usually also includes a washroom, toilet, bathroom, etc. For example, a bathroom disclosed in the Chinese patent with the authorization announcement number CN207878968U is shown in the following figure. Figure 2 As shown ( Figure 2 The numbers in the figure have nothing to do with the numbers used in this utility model. There are multiple bathrooms distributed on various floors. The bathrooms on each floor include a washing area, a drainage area, and a ventilation area. The washing area includes a sink, a toilet, and a bathtub. The drainage area includes a water pipe well, a floor drain, and a drainage pipe. The ventilation area includes an exhaust fan and a ventilation pipe. It can be seen that most bathrooms currently have a variety of pipes buried in the walls or underground, and there are multiple connection points or valve switches or interfaces between the pipes. Based on this, it is not only complicated to judge the leakage of the hidden pipes in the bathroom, but also the cost of maintenance and replacement is very high. To this end, in order to solve the above-mentioned problems, the present utility model provides a device for judging the leakage of hidden pipes in the bathroom, so as to efficiently and conveniently judge the leakage points of the hidden pipes in the bathroom, thereby facilitating maintenance and reducing costs.

[0032] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Depend on Figures 2 to 8 Some embodiments of the present invention relate to a device for determining water leakage in a hidden pipe in a bathroom, including:

[0034] The transfer assembly includes a delivery pipe 1, an air guide pipe 2, and a soft spring 3. The air guide pipe 2 is located inside the delivery pipe 1. The inner wall of the detection section 101 of the delivery pipe 1 is formed with an air hole 4 for fixing the port of the air guide pipe 2. The soft spring 3 is sleeved on the support section 102 of the delivery pipe 1 and is used to drive the detection section 101 to move within the pipe body 5.

[0035] The cavity detection assembly includes two airbags 6, which are relatively mounted at both ends of the detection section 101 and are both connected to the interior of the delivery tube 1. The two airbags 6 and the inner wall of the pipe body 5 can enclose a detection chamber 7;

[0036] The air supply component is connected to the delivery tube 1 and the air guide tube 2 respectively. The air supply component is used to supply air to the airbag 6 and the detection chamber 7, and to display the air pressure changes in the airbag 6 and the detection chamber 7.

[0037] In these embodiments, the delivery pipe 1 can be an elastic tube with a certain rigidity, such as a traditional plastic tube, and a part of the front end of the delivery pipe 1 is the detection section 101. The length of the detection section 101 can be flexibly selected according to the detection requirements. The remaining part of the delivery pipe 1 except the front end is the support section 102. It can be understood that the length of the support section 102 is much greater than the length of the detection section 101, so that the detection section 101 can be stably extended into the pipeline body 5 by manipulating the support section 102. In order to be suitable for pipeline leak detection, the overall length of the delivery pipe 1 is usually greater than the pipeline body 5, so that it can be placed in the pipeline body 5 for use.

[0038] Air tube 2 can be a flexible tube, such as a conventional rubber tube. As a flexible tube inserted into delivery tube 1, its length matches that of delivery tube 1. Air tube 2 inflates air out of delivery tube 1 through air holes 4 on delivery tube 1, thereby inflating detection chamber 7. Soft spring 3 is a flexible spring that can flexibly move along the interior of the pipe. Its length matches that of delivery tube 1.

[0039] Through the cooperation of the delivery pipe 1, the air guide pipe 2 and the soft spring 3, the soft spring 3 is controlled to connect the delivery pipe 1 to the air guide pipe 2 and move them together into the pipe body 5, so that the pipe body 5 can be gradually detected through the detection section 101. Specifically, the hand-controlled support section 102 and the soft spring 3 on it can quickly and stably move the detection section 101 in the pipe body 5 by rotating and / or pushing the soft spring 3 and the delivery pipe 1, thereby detecting the pipe body section by section. The operation is more convenient and flexible, and is more suitable for use in bathroom pipes.

[0040] Furthermore, the airbag 6 is an annular inflatable rubber airbag, and its air inlet nozzle 601 is formed on the inner ring wall of the airbag 6 and penetrates into the delivery pipe 1. Air is supplied through the air supply component, and then gas is provided to the airbag 6 through the delivery pipe 1 to inflate the airbag 6. After inflation, the two airbags 6 expand to form a disc shape. The front and rear disc-shaped airbags 6 on the detection section 101 can fit tightly against the inner wall of the pipe body 5, and then cooperate with the inner wall of the pipe body 5 to form a closed detection chamber 7. Subsequently, based on the air supply component, the detection chamber 7 is inflated through the air guide tube 2, thereby realizing the judgment of the water leakage point of the pipe body 5.

[0041] Through the cooperation of the transfer component, the cavity detection component and the air supply component, the leaking part of the pipeline body 5, that is, the leaking point, can be quickly and effectively determined. The detection section 101 is transported based on the soft spring 3, and the operation is more flexible and simple, which effectively avoids repeated demolition and renovation. The leaking part of the pipeline can be found quickly and accurately, so that the inspection and maintenance can be completed efficiently with one demolition. It can also greatly reduce the demolition area, avoid unnecessary waste, greatly save the cost of pipeline maintenance, better reduce the family's economic burden, and be more practical.

[0042] It should be understood that various pipes in the bathroom usually have multiple joints. When detecting pipe leaks, you can insert your probe into the pipe from different joints to conduct detection. This can not only enable more comprehensive detection, but also avoid excessive bending of the pipe that affects the insertion of the detection section 101, thereby ensuring the smooth detection of hidden pipe leaks.

[0043] Furthermore, in addition to pipes buried in walls or underground, some exposed pipes in the bathroom that are not convenient for direct detection are also applicable to the utility model, such as pipes exposed in cracks, pipes that are difficult to disassemble, or pipes that are covered and inconvenient to expose, etc. The utility model can realize leakage detection.

[0044] In some embodiments of the device for determining water leakage in hidden bathroom pipes, the outer ring surfaces at both ends of the support section 102 are fixedly mounted with fixing seats 8 , and the two ends of the soft spring 3 are fixedly connected to the corresponding fixing seats 8 .

[0045] In these embodiments, the fixing seat 8 is fixedly mounted on the outer annular surfaces at both ends of the supporting section 102, such as Figure 2 As shown, the fixing seat 8 can be installed by bonding, welding, etc., which is convenient for flexible replacement and use. The two fixing seats 8 can stably support the soft spring 3. At the same time, the fixing seat 8 located at the tail end of the support section 102 can also be used as a handle to facilitate operation. The fixing seat 8 near the tail end of the support section 102 is formed with a mounting groove, which is used to install the air supply component (see below for details) to ensure the stability of the gas supply in the delivery pipe 1 and the air guide pipe 2.

[0046] In some embodiments of the device for determining water leakage in hidden pipes in bathrooms, a holder 9 is fixedly mounted on the outer annular surfaces at both ends of the detection section 101, and the airbag 6 is fixedly mounted on the holder 9. The inner bottom wall of the holder 9 is formed with a mounting hole 10 connected to the interior of the delivery pipe 1, and the air inlet nozzle 601 of the airbag 6 extends into the interior of the delivery pipe 1 through the mounting hole 10.

[0047] In these embodiments, the holder 9 is fixedly mounted on the detection section 101 of the delivery tube 1, and the fixing method thereof can be bonding, welding, etc., which is convenient for flexible replacement and use. An annular groove adapted to the airbag 6 is formed on the holder 9. The airbag 6 can be firmly mounted through the annular groove to ensure the sealing between the airbag 6 and the holder 9. At the same time, it is convenient to insert the air inlet nozzle 601 of the airbag 6 into the mounting hole 10 to ensure the connection between the airbag 6 and the delivery tube 1, ensure the stable delivery of gas, and make the inflation of the airbag 6 more stable.

[0048] In some embodiments of the device for determining water leakage in hidden pipes in bathrooms, there are a plurality of mounting holes 10 , which are arranged on the base 9 in a circular array.

[0049] In some embodiments of the device for determining water leakage in hidden pipes in bathrooms, there are multiple air inlet nozzles 601 , and the multiple air inlet nozzles 601 are correspondingly installed in the installation holes 10 .

[0050] In these embodiments, the multiple mounting holes 10 facilitate flexible installation of the air inlet nozzle 601 of the airbag 6. Furthermore, the cooperation of the multiple mounting holes 10 and the multiple air inlet nozzles 601 can ensure rapid inflation of the airbag 6, which is beneficial to improving detection efficiency.

[0051] In some embodiments of the device for determining water leakage in hidden pipes in bathrooms, a steering head 11 is fixedly mounted on one end of the delivery pipe 1 located at the detection section 101 .

[0052] In these embodiments, the steering head 11 is spherical, and the spherical steering head 11 can better extend and move at the bend of the pipeline body 5, thereby ensuring smooth movement of the conveying pipe 1 in the pipeline body 5.

[0053] In some embodiments of the device for determining water leakage in hidden pipes in bathrooms, the air supply component includes a first air supply pipe 12 and a second air supply pipe 13. The output end of the first air supply pipe 12 is connected to the delivery pipe 1, and the output end of the second air supply pipe 13 extends from the side wall of the first air supply pipe 12 into the first air supply pipe 12 and is connected to the air guide pipe 2. The input ends of the first air supply pipe 12 and the second air supply pipe 13 are both connected to the air pump 14.

[0054] In some embodiments of the device for determining water leakage in hidden pipes in bathrooms, a first pressure gauge 15 is fixedly installed on the first air supply pipe 12 , and a second pressure gauge 16 is fixedly installed on the second air supply pipe 13 .

[0055] In these embodiments, Figure 7 As shown, the air pump 14 is connected to the delivery pipe 1 and the air guide pipe 2 through the first air supply pipe 12 and the second air supply pipe 13 respectively. The air pump 14 can stably supply air to the airbag 6 and the detection chamber 7. At the same time, the first pressure gauge 15 and the second pressure gauge 16 can timely and accurately detect the air pressure changes in the airbag 6 and the detection chamber 7, thereby determining the water leakage (point) of the pipeline body 5.

[0056] Specifically, after controlling the soft spring 3 and the delivery pipe 1 to extend the detection section 101 into the pipeline body 5, the air pump 14 is started, and air is first supplied to the delivery pipe 1 through the first air supply pipe 12 to inflate the two air bags 6 so that they form a detection chamber 7 with the inner wall of the pipeline body 5. The air bags 6 are kept in a stable state by observing the first pressure gauge 15 (the valve on the first air supply pipe 12 can also be closed, which is not shown in the figure). Then, air is supplied to the air guide pipe 2 through the second air supply pipe 13, and then the detection chamber 7 is inflated. The leakage point is detected by observing the changes in the second pressure gauge 16. Specifically, when the second pressure gauge 16 reaches a certain value (such as 150kPa), the air supply is stopped, and the valve on the second air supply pipe 13 is closed (not shown in the figure). Then, the changes in the value on the second pressure gauge 16 are observed. If the value decreases rapidly, it indicates that there is a leak in the secondary section of the pipeline. If the value remains unchanged or decreases very slightly (based on the consideration of air leakage due to poor sealing), it indicates that there is no leak in this section of the pipeline. The airbag 6 can then be deflated and moved to the next section of the pipeline, and the above operation can be repeated to continue the inspection until the leak point is detected or the inspection of all pipelines is completed.

[0057] It should be understood that, in the present invention, the specific mechanical structures and working principles of the air pump 14, the first pressure gauge 15, the second pressure gauge 16, and the airbag 6 are all prior art, so they will not be described in detail in this article. In addition, in the present invention, the working principle of leak detection based on the air pressure change in the pipeline body 5 based on the airbag 6 is also prior art, so it will not be described in detail in the present invention. Please refer to the Chinese patent announcement No. CN113970414A which discloses an underground pipeline leak detection device and a detection method thereof. The airbag detection principle in the present invention is the same.

[0058] In order to further efficiently and accurately determine the specific location of the pipeline leakage point, some embodiments of the bathroom hidden pipeline leakage judgment device also include a position display component, which is used to display the position of the detection section 101 in the hidden pipeline body 5.

[0059] In some embodiments of the device for determining water leakage in hidden pipes in bathrooms, the position display component includes a miniature wireless remote control speaker 17 , which is fixedly mounted on the inner wall of the detection section 101 .

[0060] In these embodiments, during actual detection, the miniature wireless remote speaker 17 is equipped with a remote controller for the operator to use, and the remote controller is used to make the miniature wireless remote speaker 17 emit a sound. The miniature wireless remote speaker 17 is fixedly mounted on the detection section 101. When a leak in a buried pipe is detected, the remote controller is used to make the miniature wireless remote speaker 17 emit a sound (the sound may be relatively harsh to facilitate accurate judgment). The location of the leak on the ground or wall can be determined based on the sound, thereby enabling efficient and accurate positioning, reducing the area of ​​renovation and demolition, and improving maintenance efficiency.

[0061] It should be understood that the mechanical structure and working principle of the miniature wireless remote control speaker 17 and the remote control are both existing technologies, so their detailed mechanical structure and working principle are not described in detail in this article.

[0062] In addition, the position display component can also include a magnet, which is fixedly installed in the steering head 11. When a pipeline leak is detected, the operator uses another magnet on the ground or wall to determine the specific location through changes in magnetic force (changes in hand strength).

[0063] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for judging water leakage in hidden pipes in bathrooms, characterized in that: include: A transfer assembly, the transfer assembly comprising a delivery pipe (1), an air guide pipe (2) and a soft spring (3); the air guide pipe (2) is located inside the delivery pipe (1); an air hole (4) for fixing and mounting a port of the air guide pipe (2) is formed on the inner side wall of the detection section (101) of the delivery pipe (1); the soft spring (3) is sleeved on the support section (102) of the delivery pipe (1); and the soft spring (3) is used to drive the detection section (101) to transfer within the pipeline body (5); A cavity detection assembly comprises two air bags (6), the two air bags (6) being mounted oppositely at the two ends of the detection section (101) and both being in communication with the interior of the delivery pipe (1), the two air bags (6) and the inner wall of the pipe body (5) being able to enclose a detection chamber (7); An air supply component is connected to the delivery tube (1) and the air guide tube (2) respectively, and is used to supply air to the air bag (6) and the detection chamber (7), and to display the air pressure changes in the air bag (6) and the detection chamber (7).

2. The device for judging water leakage in hidden pipes in bathrooms according to claim 1, characterized in that: The outer ring surfaces at both ends of the support section (102) are fixedly mounted with fixing seats (8), and the two ends of the soft spring (3) are respectively fixedly connected to the corresponding fixing seats (8).

3. The device for judging water leakage in hidden pipes in bathrooms according to claim 1, characterized in that: A holder (9) is fixedly mounted on the outer annular surfaces at both ends of the detection section (101), the airbag (6) is fixedly mounted on the holder (9), an inner bottom wall of the holder (9) is formed with a mounting hole (10) communicating with the interior of the delivery pipe (1), and an air inlet nozzle (601) of the airbag (6) extends into the interior of the delivery pipe (1) through the mounting hole (10).

4. The device for judging water leakage in hidden pipes in bathrooms according to claim 3, characterized in that: There are a plurality of mounting holes (10), and the plurality of mounting holes (10) are arranged in a circular array on the card seat (9).

5. The device for judging water leakage in hidden pipes in bathrooms according to claim 4, characterized in that: There are a plurality of air inlet nozzles (601), and the plurality of air inlet nozzles (601) are correspondingly installed in the installation holes (10).

6. The device for judging water leakage in hidden pipes in bathrooms according to claim 1, characterized in that: A steering head (11) is fixedly mounted on one end of the delivery pipe (1) located in the detection section (101).

7. The device for judging water leakage in hidden pipes in bathrooms according to claim 1, characterized in that: The air supply assembly comprises a first air supply pipe (12) and a second air supply pipe (13), wherein the output end of the first air supply pipe (12) is connected to the delivery pipe (1), and the output end of the second air supply pipe (13) extends from the side wall of the first air supply pipe (12) into the first air supply pipe (12) and is connected to the air guide pipe (2), and the input ends of the first air supply pipe (12) and the second air supply pipe (13) are both connected to an air pump (14).

8. The device for judging water leakage in hidden pipes in bathrooms according to claim 7, characterized in that: A first air pressure gauge (15) is fixedly mounted on the first air supply pipe (12), and a second air pressure gauge (16) is fixedly mounted on the second air supply pipe (13).

9. The device for judging water leakage in hidden pipes in bathrooms according to claim 1, characterized in that: It also includes a position display component, which is used to display the position of the detection section (101) in the hidden pipe body (5).

10. The device for judging water leakage in hidden pipes in bathrooms according to claim 9, characterized in that: The position display component comprises a miniature wireless remote control speaker (17), and the miniature wireless remote control speaker (17) is fixedly mounted on the inner side wall of the detection section (101).

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