Dust screen filth blockage detection device and air conditioner

Abstract

The utility model provides a dust screen filth blockage detection device and an air conditioner, and belongs to the technical field of air conditioners. The dust screen filth blockage detection device comprises an ultrasonic conduction assembly, an ultrasonic output source and an ultrasonic receiver. The ultrasonic conduction assembly comprises a first conduction piece and a second conduction piece, and the first conduction piece and the second conduction piece are arranged at intervals. The ultrasonic output source and the ultrasonic receiver are located on the two sides of the ultrasonic conduction assembly respectively, the ultrasonic output source is close to the first conduction piece, and the ultrasonic receiver is close to the second conduction piece. The ultrasonic output source is configured to emit ultrasonic waves to the second conductor. The ultrasonic receiver is configured to receive the ultrasonic signal output by the first conduction piece. According to the invention, the filth blockage condition on the dustproof net of the air conditioner can be accurately and automatically detected.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and in particular relates to a dust screen dirty blockage detection device and an air conditioner. Background Art

[0002] Air conditioners used in high-dust environments such as mine warehouses are equipped with dust screens at the condenser to filter external dust. When dust accumulates on the dust screen, the air volume and cooling capacity of the air conditioner will be reduced, and the dust screen needs to be cleaned regularly.

[0003] In the related art, a reminder of dust screen dirtiness is set in advance according to the usage time of the air conditioner. When the usage time of the air conditioner exceeds the set reminder time, the air conditioner will send a reminder signal that the dust screen is dirty and needs to be cleaned, reminding the user to clean the dust on the dust screen in time. Alternatively, a manual regular visual inspection method is used to determine the dirtiness of the air conditioner's dust screen, and then the dust screen is cleaned according to the manual judgment.

[0004] However, the method of setting reminders based on the air conditioner usage time is easily affected by environmental changes. If a high dust pollution environment is encountered, dust will accumulate on the dust screen quickly, and the signal indicating that the dust screen is dirty and blocked will not be timely. The method of manually visually judging the dirtiness and blockage on a regular basis is both inaccurate and wastes manpower. Utility Model Content

[0005] The embodiment of the present disclosure provides a dust screen dirt blockage detection device and an air conditioner, which can accurately and automatically detect the dirt blockage on the dust screen of the air conditioner. The technical solution is as follows:

[0006] The embodiment of the present disclosure provides a dust screen dirty blockage detection device, including an ultrasonic transmission component, an ultrasonic output source, and an ultrasonic receiver. The ultrasonic transmission component includes a first transmission member and a second transmission member, and the first transmission member and the second transmission member are arranged at intervals. The ultrasonic output source and the ultrasonic receiver are respectively located on both sides of the ultrasonic transmission component, the ultrasonic output source is close to the first transmission member, and the ultrasonic receiver is close to the second transmission member. The ultrasonic output source is configured to emit ultrasonic waves to the second transmission member. The ultrasonic receiver is configured to receive the ultrasonic signal output by the first transmission member.

[0007] In one implementation of the present disclosure, the first conductive member includes a branch output section, an output connection section, and a main output section. There are at least two branch output sections, each of which is arranged at intervals from each other, and one end of each branch output section is connected to a side surface of the output connection section. The output connection section is connected to one end of the main output section away from the other side surface of the branch output section. The other end of the main output section is close to the ultrasonic output source.

[0008] In another implementation of the present disclosure, the second conductive member includes a branch receiving section, a receiving connection section and a main receiving section. There are at least two branch receiving sections, each of which is arranged at intervals from each other, and one end of each branch receiving section is connected to a side surface of the receiving connection section. The receiving connection section is connected to one end of the main receiving section away from the other side surface of the branch receiving section. The branch receiving section and the branch output section are located in the same plane. The other end of the main receiving section is close to the ultrasonic receiver.

[0009] In another implementation of the present disclosure, the output connection section and the receiving connection section are spaced apart, the branch output section and the branch receiving section are both located between the output connection section and the receiving connection section, and the branch output section and the branch receiving section are spaced apart.

[0010] In yet another implementation of the present disclosure, the branch output sections and the branch receiving sections are arranged alternately and spaced apart in sequence, and dust accumulation gaps are formed between adjacent branch output sections and branch receiving sections.

[0011] In yet another implementation of the present disclosure, the dust screen dirtiness and blockage detection device further includes a control panel, and the control panel is electrically connected to the ultrasonic output source and the ultrasonic receiver, respectively.

[0012] The disclosed embodiment also provides an air conditioner, comprising the dust screen dirtiness and blockage detection device.

[0013] In an implementation of the present disclosure, the air conditioner comprises a dustproof net and a condenser, the dustproof net is spaced apart from the condenser and the dustproof net dirty blockage detection device is located between the dustproof net and the condenser.

[0014] In another implementation of the present disclosure, a plane formed by the first conductive member and the second conductive member is parallel to the dustproof net.

[0015] In another implementation of the present disclosure, the dustproof net includes a first bracket, a second bracket and a net body. One end of the first bracket is connected to the ultrasonic output source. One end of the second bracket is connected to the ultrasonic receiver. The other end of the first bracket and the other end of the second bracket are both connected to the same surface of the net body.

[0016] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0017] The dust screen dirty blockage detection device is installed between the dust screen and the condenser of the air conditioner. Because the first conductive member is close to the ultrasonic output source and the second conductive member is close to the ultrasonic receiver, the first conductive member can receive the ultrasonic signal output by the ultrasonic output source, and the second conductive member can transmit the ultrasonic signal to the ultrasonic receiver. Since the first conductive member and the second conductive member are arranged at intervals, the gap formed between the two will accumulate dust as the air conditioner works. When the dust in the gap between the first conductive member and the second conductive member accumulates to a certain extent, the ultrasonic signal received by the first conductive member can be transmitted to the second conductive member through the dust accumulation in the gap, and then the ultrasonic signal is transmitted to the ultrasonic receiver. In other words, if the ultrasonic receiver receives the ultrasonic signal, it proves that the dust in the gap between the first conductive member and the second conductive member has accumulated to a certain extent, which can reflect the dirty blockage on the ultrasonic conductive component. Since the dust screen dirty blockage detection device is located between the dust screen and the condenser of the air conditioner, the dirty blockage on the ultrasonic conductive component can reflect the dirty blockage on the dust screen of the air conditioner.

[0018] That is to say, the dust screen dirt and blockage detection device can accurately and automatically detect the dirt and blockage situation on the dust screen of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a structural schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0021] Figure 2 It is a structural schematic diagram of a dust screen dirty blockage detection device provided by an embodiment of the present disclosure;

[0022] Figure 3 It is a schematic diagram of the assembly of the dust screen dirty blockage detection device and the air conditioner provided in the embodiment of the present disclosure.

[0023] The symbols in the figure mean the following:

[0024] 10. Ultrasonic wave conduction components;

[0025] 101, first conductive element; 1011, branch output section; 1012, output connection section; 1013, main output section; 102, second conductive element; 1021, branch receiving section; 1022, receiving connection section; 1023, main receiving section;

[0026] 20. Ultrasonic output source;

[0027] 30. Ultrasonic receiver;

[0028] 40. Dust accumulation gap;

[0029] 50. Control panel;

[0030] 60. Dustproof net;

[0031] 601, first bracket; 602, second bracket; 603, mesh body;

[0032] 70. Condenser. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0034] Figure 1 is a structural diagram of an air conditioner provided by an embodiment of the present disclosure, such as Figure 1 As shown, the embodiment of the present disclosure provides an air conditioner, which includes a dust screen dirty blockage detection device, a dust screen 60 and a condenser 70, wherein the dust screen 60 is spaced apart from the condenser 70. The dust screen dirty blockage detection device is located between the dust screen 60 and the condenser 70.

[0035] Because the dustproof net 60 is where dust accumulates during the operation of the air conditioner, the dustproof net dirty blockage detection device is placed between the dustproof net 60 and the condenser 70, so that the dust accumulation and dirty blockage conditions on the dustproof net dirty blockage detection device can reflect the dust accumulation and dirty blockage conditions on the dustproof net 60.

[0036] Figure 2 is a schematic diagram of the structure of a dust screen dirty blockage detection device provided by an embodiment of the present disclosure, such as Figure 2 As shown, an embodiment of the present disclosure provides a dust screen dirtiness and blockage detection device, including an ultrasonic conduction component 10, an ultrasonic output source 20, and an ultrasonic receiver 30.

[0037] Because the ultrasonic output source 20 and the ultrasonic receiver 30 are respectively close to the two sides of the ultrasonic conduction component 10, when dust accumulates on the ultrasonic conduction component 10, the ultrasonic signal emitted by the ultrasonic output source 20 can be transmitted to the ultrasonic receiver 30 through the ultrasonic conduction component 10. According to the ultrasonic signal, the dust net blockage detection device can accurately and automatically detect the blockage condition on the ultrasonic conduction component 10.

[0038] As can be seen from the foregoing, the dust screen dirty blockage detection device can accurately and automatically detect the dirty blockage of the ultrasonic transmission component 10. The dust screen dirty blockage detection device is further introduced below. Figure 2The ultrasonic wave transmission component 10 includes a first transmission component 101 and a second transmission component 102, and the first transmission component 101 and the second transmission component 102 are arranged at intervals. The ultrasonic wave output source 20 and the ultrasonic wave receiver 30 are respectively located on both sides of the ultrasonic wave transmission component 10, and the ultrasonic wave output source 20 is close to the first transmission component 101, and the ultrasonic wave receiver 30 is close to the second transmission component 102. The ultrasonic wave output source 20 is configured to transmit ultrasonic waves to the second transmission component 102. The ultrasonic wave receiver 30 is configured to receive the ultrasonic wave signal output by the first transmission component 101.

[0039] The dust screen dirty blockage detection device is installed between the dust screen 60 and the condenser 70 of the air conditioner. Because the first conductive member 101 is close to the ultrasonic output source 20 and the second conductive member 102 is close to the ultrasonic receiver 30, the first conductive member 101 can receive the ultrasonic signal output by the ultrasonic output source 20, and the second conductive member 102 can transmit the ultrasonic signal to the ultrasonic receiver 30. Since the first conductive member 101 and the second conductive member 102 are arranged at intervals, the gap formed between the two will accumulate dust as the air conditioner works. When the dust in the gap between the first conductive member 101 and the second conductive member 102 accumulates to a certain extent, the ultrasonic signal received by the first conductive member 101 can be transmitted to the second conductive member 102 through the dust in the gap, and then the ultrasonic signal is transmitted to the ultrasonic receiver 30. In other words, if the ultrasonic receiver 30 receives the ultrasonic signal, it proves that the dust in the gap between the first conductive member 101 and the second conductive member 102 has accumulated to a certain extent, which can reflect the detection of the dirty blockage on the ultrasonic conductive component 10. Furthermore, since the dust screen dirtiness and blockage detection device is located between the dust screen 60 and the condenser 70 of the air conditioner, the dirtiness and blockage condition on the ultrasonic transmission component 10 can reflect the dirtiness and blockage condition on the dust screen 60 of the air conditioner.

[0040] That is to say, the dust screen dirt and blockage detection device can accurately and automatically detect the dirt and blockage situation on the dust screen 60 of the air conditioner.

[0041] In this embodiment, see Figure 2 The first conductive member 101 includes a branch output section 1011, an output connection section 1012, and a main output section 1013. There are at least two branch output sections 1011, each branch output section 1011 is arranged at intervals, and one end of each branch output section 1011 is connected to one side of the output connection section 1012. The other side of the output connection section 1012 away from the branch output section 1011 is connected to one end of the main output section 1013. The other end of the main output section 1013 is close to the ultrasonic output source 20.

[0042] Since there are multiple branch output sections 1011, and all of them are connected to the output connection section 1012, the multiple branch output sections 1011 can be spaced apart to form a fence-like shape, so that dust can accumulate at the location of the branch output sections 1011. In addition, because one end of the main output section 1013 is close to the ultrasonic output source 20 and the other end is connected to the output connection section 1012, the ultrasonic signal emitted from the ultrasonic output source 20 can be transmitted along the main output section 1013, the output connection section 1012, the branch output section 1011, and the dust accumulated on the branch output section 1011 in sequence.

[0043] For example, see Figure 2 There are two branch output sections 1011, one end of each branch output section 1011 is connected to one side of the output connecting section 1012, the two branch output sections 1011 are spaced apart from each other and arranged end to end, and the other ends of each branch output section 1011 are spaced apart from the receiving connecting section 1022 in the second conductive member 102, so that in an environment without dust accumulation, the ultrasonic signal emitted by the ultrasonic output source 20 will not be transmitted to the ultrasonic receiver 30.

[0044] Optionally, one end of the main output section 1013 away from the output connection section 1012 is close to the ultrasonic output source 20 and is directly connected to the ultrasonic output source 20, so that the ultrasonic signal output by the ultrasonic output source 20 is stronger and more accurate.

[0045] In this embodiment, the second conductive member 102 includes a branch receiving section 1021, a receiving connecting section 1022, and a main receiving section 1023. There are at least two branch receiving sections 1021, each branch receiving section 1021 is arranged at intervals from each other, and one end of each branch receiving section 1021 is connected to one side of the receiving connecting section 1022. The other side of the receiving connecting section 1022 away from the branch receiving section 1021 is connected to one end of the main receiving section 1023. The branch receiving section 1021 and the branch output section 1011 are located in the same plane. The other end of the main receiving section 1023 is close to the ultrasonic receiver 30.

[0046] Because one side of the receiving connection section 1022 is connected to a plurality of branch receiving sections 1021, and there is a gap between each branch receiving section 1021, dust can accumulate in the gap between each branch receiving section 1021. Also, because one end of the main receiving section 1023 is connected to the side of the receiving connection section 1022 away from the branch receiving section 1021, and the other end is close to the ultrasonic receiver 30, in the second conductive member 102, the ultrasonic signal can be transmitted in sequence along the dust accumulated on the branch receiving section 1021, the branch receiving section 1021, the receiving connection section 1022, and the main receiving section 1023, and finally transmitted to the ultrasonic receiver 30.

[0047] For example, see Figure 2There are three branch receiving sections 1021, one end of each of the three branch receiving sections 1021 is connected to one side of the receiving connection section 1022, the three branch receiving sections 1021 are spaced apart from each other and arranged end to end, and the other ends of each of the three branch receiving sections 1021 are spaced apart from the output connection section 1012 in the first conductive member 101, so that in an environment without dust accumulation, the ultrasonic receiver 30 will not receive the ultrasonic signal emitted by the ultrasonic output source 20.

[0048] Optionally, one end of the main receiving section 1023 away from the receiving connection section 1022 is close to the ultrasonic receiver 30 and is directly connected to the ultrasonic receiver 30, so that the ultrasonic signal received by the ultrasonic receiver 30 is stronger and more accurate.

[0049] In this embodiment, the output connection section 1012 and the receiving connection section 1022 are spaced apart, the branch output section 1011 and the branch receiving section 1021 are both located between the output connection section 1012 and the receiving connection section 1022, and the branch output section 1011 and the branch receiving section 1021 are spaced apart.

[0050] Since the output connection section 1012 and the receiving connection section 1022 are spaced apart, and the branch output section 1011 and the branch receiving section 1021 located therebetween are also spaced apart from each other, in an environment without dust accumulation, the ultrasonic signal emitted from the ultrasonic output source 20 cannot be transmitted through an intermediate medium, and the ultrasonic receiver 30 cannot receive the ultrasonic signal either.

[0051] In this embodiment, the branch output sections 1011 and the branch receiving sections 1021 are arranged alternately and spaced apart in sequence, and dust accumulation gaps 40 are formed between adjacent branch output sections 1011 and adjacent branch receiving sections 1021 .

[0052] Because the output sections 1011 and the receiving sections 1021 are arranged alternately and spaced in sequence to form dust accumulation gaps 40 in a fence-like shape, dust can accumulate in these dust accumulation gaps 40 in a dusty environment, thereby allowing the ultrasonic signal to be transmitted between the first conductive element 101 and the second conductive element 102 through an intermediate medium.

[0053] by Figure 2For example, the arrangement between each branch output section 1011 and each branch receiving section 1021 is introduced. Two branch output sections 1011 and three branch receiving sections 1021 are arranged between the output connection section 1012 and the receiving connection section 1022. The first branch receiving section 1021, the first branch output section 1011, the second branch receiving section 1021, the second branch output section 1011 and the third branch output section are arranged alternately and spaced in sequence and all aligned end to end. The first branch receiving section 1021 and the adjacent first branch output section 1011 are separated to form a first dust accumulation gap 40, the first branch output section 1011 and the adjacent second branch receiving section 1021 are separated to form a second dust accumulation gap 40, the second branch receiving section 1021 and the adjacent second branch output section 1011 are separated to form a third dust accumulation gap 40, and the second branch output section 1011 and the adjacent third branch receiving section 1021 are separated to form a fourth dust accumulation gap 40. Dust can be contained in the four dust gaps 40, and the formed dust can be used as an intermediate medium for ultrasonic signal transmission, so that when a lot of dust is blocked in the dust gaps 40, the ultrasonic signal output by the ultrasonic output source 20 can be transmitted along the first conductive member 101, the dust and the second conductive member 102 in sequence, and finally transmitted to the ultrasonic receiver 30. When there is less dust blocking in the dust gaps 40, the ultrasonic signal output by the ultrasonic output source 20 cannot be transmitted to the ultrasonic receiver 30 through the ultrasonic conductive component 10.

[0054] Figure 3 : is a schematic diagram of the assembly of the dust screen dirty blockage detection device and the air conditioner provided by the embodiment of the present disclosure, such as Figure 3 As shown, the ultrasonic wave conducting component 10 is located between the dustproof net 60 and the condenser 70 , and the plane formed by the first conducting member 101 and the second conducting member 102 is parallel to the dustproof net 60 .

[0055] Since the ultrasonic conduction component 10 is located between the dustproof net 60 and the condenser 70 of the air conditioner, when the air conditioner is running, dust will accumulate on the dustproof net 60 and also on the ultrasonic conduction component 10, and the plane formed by the first conduction member 101 and the second conduction member 102 is parallel to the dustproof net 60, so the dust accumulation on the ultrasonic conduction component 10 is close to the dust accumulation on the dustproof net 60, so that the dirt and blockage condition on the ultrasonic conduction component 10 can reflect the dirt and blockage condition on the dustproof net 60 of the air conditioner.

[0056] That is to say, the dust screen dirt and blockage detection device and the air conditioner can accurately and automatically detect the dirt and blockage condition of the dust screen 60 of the air conditioner.

[0057] In this embodiment, see Figure 1The dust screen dirty blockage detection device also includes a control panel 50, and the control panel 50 is electrically connected to the ultrasonic output source 20 and the ultrasonic receiver 30 respectively.

[0058] For example, because the control panel 50 is electrically connected to the ultrasonic output source 20 and the ultrasonic receiver 30, the size and period of the ultrasonic output of the ultrasonic output source 20 can be controlled through the control panel 50, and after receiving the ultrasonic signal from the ultrasonic output source 20, the ultrasonic receiver 30 can transmit the ultrasonic signal to the control panel 50. The control template then converts the received ultrasonic signal into a display signal, and displays "The dustproof net is dirty and blocked" on the display screen of the control panel 50, so as to promptly remind the operator to clean the dirty and blocked dustproof net 60.

[0059] In this embodiment, the dustproof net 60 includes a first bracket 601, a second bracket 602 and a net body 603. One end of the first bracket 601 is connected to the ultrasonic output source 20. One end of the second bracket 602 is connected to the ultrasonic receiver 30. The other end of the first bracket 601 and the other end of the second bracket 602 are both connected to the same surface of the net body 603.

[0060] For example, see Figure 3 One end of the first bracket 601 is connected to the ultrasonic output source 20 by welding, and one end of the second bracket 602 is connected to the ultrasonic receiver 30 by welding. Under the condition that the first conductive member 101 and the second conductive member 102 located between the ultrasonic output source 20 and the ultrasonic receiver 30 do not interfere with each other, the other end of the first bracket 601 and the other end of the second bracket 602 are connected to the same surface of the mesh body 603 by welding, and the surface of the mesh body 603 connected with the first bracket 601 and the second bracket 602 is arranged opposite to the condenser 70 of the air conditioner. The dustproof net dirty blockage detection device is assembled and installed on the dustproof net 60 on the air conditioner, so that the dirty blockage condition of the dustproof net 60 can be detected.

[0061] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A dust screen dirty blockage detection device, characterized in that: It comprises an ultrasonic wave conduction component (10), an ultrasonic wave output source (20), and an ultrasonic wave receiver (30); The ultrasonic wave conducting component (10) comprises a first conducting member (101) and a second conducting member (102), wherein the first conducting member (101) and the second conducting member (102) are arranged at an interval; The ultrasonic output source (20) and the ultrasonic receiver (30) are respectively located on two sides of the ultrasonic conductive component (10), the ultrasonic output source (20) is close to the first conductive component (101), and the ultrasonic receiver (30) is close to the second conductive component (102); The ultrasonic wave output source (20) is configured to emit ultrasonic waves to the second conductive member (102); The ultrasonic receiver (30) is configured to receive the ultrasonic signal output by the first conductive element (101).

2. The dust screen dirty blockage detection device according to claim 1, characterized in that: The first conductive member (101) comprises a branch output section (1011), an output connecting section (1012) and a main output section (1013); There are at least two branch output sections (1011), each branch output section (1011) is arranged at intervals from each other, and one end of each branch output section (1011) is connected to a side surface of the output connection section (1012); The other side surface of the output connection section (1012) away from the branch output section (1011) is connected to one end of the main output section (1013); The other end of the main output section (1013) is close to the ultrasonic output source (20).

3. The dust screen dirty blockage detection device according to claim 2, characterized in that: The second conductive member (102) comprises a branch receiving section (1021), a receiving connection section (1022) and a main receiving section (1023); There are at least two branch receiving sections (1021), each of the branch receiving sections (1021) is arranged at intervals from each other, and one end of each of the branch receiving sections (1021) is connected to a side surface of the receiving connection section (1022); The other side surface of the receiving connection section (1022) away from the branch receiving section (1021) is connected to one end of the main receiving section (1023); The branch receiving section (1021) and the branch output section (1011) are located in the same plane; The other end of the main receiving section (1023) is close to the ultrasonic receiver (30).

4. The dust screen dirty blockage detection device according to claim 3, characterized in that: The output connection section (1012) and the receiving connection section (1022) are spaced apart, the branch output section (1011) and the branch receiving section (1021) are both located between the output connection section (1012) and the receiving connection section (1022), and the branch output section (1011) and the branch receiving section (1021) are spaced apart.

5. The dust screen dirty blockage detection device according to claim 4, characterized in that: The branch output sections (1011) and the branch receiving sections (1021) are arranged alternately and spaced in sequence, and dust accumulation gaps (40) are formed between adjacent branch output sections (1011) and branch receiving sections (1021).

6. The dust screen dirty blockage detection device according to claim 1, characterized in that: The dust screen dirtiness and blockage detection device further comprises a control panel (50), and the control panel (50) is electrically connected to the ultrasonic output source (20) and the ultrasonic receiver (30) respectively.

7. An air conditioner, characterized in that: A dust screen dirtiness and blockage detection device comprising any one of claims 1 to 6.

8. The air conditioner according to claim 7, characterized in that: The air conditioner comprises a dustproof net (60) and a condenser (70); The dustproof net (60) is spaced apart from and opposite to the condenser (70); The dust screen dirtiness and blockage detection device is located between the dust screen (60) and the condenser (70).

9. The air conditioner according to claim 8, characterized in that: A plane formed by the first conductive member (101) and the second conductive member (102) is parallel to the dustproof net (60).

10. The air conditioner according to claim 8, characterized in that: The dustproof net (60) comprises a first bracket (601), a second bracket (602) and a net body (603); One end of the first bracket (601) is connected to the ultrasonic output source (20); One end of the second bracket (602) is connected to the ultrasonic receiver (30); The other end of the first bracket (601) and the other end of the second bracket (602) are both connected to the same surface of the mesh body (603).

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