CN115815215A - Heating assembly, toilet bowl with heating assembly and cleaning method of heating assembly - Google Patents

Abstract

The invention relates to a heater assembly and a cleaning method for a toilet and a heating assembly thereof. The heating assembly includes a pipe body, a heating cylinder and a mounting cover. The heating cylinder is loaded into the pipe body through the mounting cover. The two ends of the heating cylinder Both are provided with openings, the heating cylinder is provided with a heating body, the pipe body is provided with a water outlet, and the pipe body is also provided with a sewage outlet; the pipe body is equipped with a first ultrasonic transducer and a vibrating A generator; the first ultrasonic transducer includes an acoustic wave emitting part and an acoustic wave receiving part. It also includes a toilet with the heater assembly and a cleaning method for the heater assembly. After the first ultrasonic transducer is used to detect whether there is dirt on the heater assembly, the first ultrasonic transducer and the vibration generator cause the heater assembly to produce different resonance modes, so that the dirt in the heater assembly is peeled off, thereby affecting the heater assembly Perform cleaning to ensure stable heating performance of the heater assembly.

Description

A kind of heating component and its toilet and heating component cleaning method

technical field

The present invention relates to the technical field of toilets, and more specifically, to a heating assembly and a cleaning method for the toilet and heating assembly thereof.

Background technique

With the rapid development of the economy, the increase of people's income, and the improvement of consumers' attention to the quality of life, smart sanitary ware has entered more and more families. As a typical representative, smart toilets are becoming more and more popular in homes, high-end hotels and other places due to their health, comfort, cleanliness and other characteristics. The smart toilet can clean the human body by spraying water after going to the toilet.

Such as the existing structure of a toilet and an intelligent toilet, including a bottom shell, an electromagnetic decompression integrated valve, a heater assembly, a distribution valve, a washer assembly, a deodorizing device, a drying device, an air pump device and a main control board; The electromagnetic decompression integrated valve, the heater assembly, the distribution valve and the washer assembly are connected in sequence and are all connected to the bottom shell, the deodorizing device, the drying device, and the air pump Both the device and the main control board are connected to the bottom case, the washer assembly includes a nozzle for cleaning the human body and a self-cleaning spray head for cleaning the nozzle, and the distribution valve is used for The nozzle and the self-cleaning nozzle supply water, and the heating component provides hot water to the washer component after heating the tap water. However, due to the tap water heated by the heating element, when the tap water is dirty, such as when there is dust, it is easy to remain inside the heater and on the heating pipe body. After a long time, a thick layer will remain, which will affect the heating performance and cause the heater If the internal pipe is blocked, it will even burn out the heating pipe. And if the hardness of tap water is high, after the water is heated, it is easy to generate scale inside the heater and on the heating tube. After a long time, a thick layer will remain, which will also affect the heating performance and even burn out the heating tube.

As shown in Figure 1 below, it is one of the heater assemblies used for toilets, including an outer tube 13, a heating cylinder 14 and a mounting cover 15, an opening is provided at one end of the outer tube 13, a water outlet 17 is provided on the tube, and a heating cylinder 14 Both ends are hollow and ceramic heating chips 16 are embedded inside, and the heating cylinder 14 is put into the outer tube and fixed by the installation cover 15 . Tap water enters from one end of the heating cylinder 14 , enters the outer pipe 13 from the other end after passing through the ceramic heating plate 16 , and flows out from the water outlet 17 of the outer pipe 13 .

Contents of the invention

In order to overcome the problem in the prior art that the heater assembly is easily affected by the formation of dirt such as scale and silt residues and affect the heating performance, the present invention provides a heating assembly and its toilet and heating assembly cleaning method, which can clean the heater pipe Dirt is detected and cleaned.

In order to solve the above technical problems, the technical solution adopted in the present invention is: a heater assembly, including a tube body, a heating cylinder and a mounting cover, the heating cylinder is loaded into the tube body through the mounting cover, and the two ends of the heating cylinder Both are provided with openings, the heating cylinder is provided with a heating body, the pipe body is provided with a water outlet, and the pipe body is also provided with a sewage outlet; the pipe body is equipped with a first ultrasonic transducer and a vibrating A generator; the first ultrasonic transducer includes an acoustic wave emitting part and an acoustic wave receiving part.

In the above-mentioned technical solution, the heater assembly is used in the toilet, and tap water enters from one end opening of the cylinder body. After being heated by the heating body, the water in the pipe body becomes hot water, and the hot water can flow out from the water outlet to the Inside the washer assembly of the toilet. Before using the heater assembly, the frequency-sweeping ultrasonic wave is emitted by the sound wave emitting part, and the vibration mode characteristic frequency in a certain frequency band of the pipe body is received by the sound wave receiving part. During the use of the heater assembly, after a period of time, if there is dirt, the sound wave emitting part emits frequency-sweeping sound waves, and then the sound wave receiving part receives the vibration modal characteristic frequency in a certain frequency band of the pipe body, both before and after If the frequency of the frequency shifts, it means that there is dirt in the heater assembly. At this time, the vibration generator uses the vibration mode characteristic frequency obtained before using the heater assembly as the transmission frequency to send ultrasonic waves to the pipe body, causing the heater assembly to Different resonance modes are generated, so that the combination of different vibration forms such as longitudinal, transverse or bending can be used to peel off the dirt in the heater assembly to achieve dirt removal, and the dirt will flow out through the sewage outlet.

The control of the sound wave emitting part, the sound wave receiving part and the vibration generator is all controlled by the controller of the toilet. The existing smart toilets are all equipped with a controller, so no further description of the controller is given.

Preferably, the inner wall of the pipe body is provided with two mounting blocks, and the sound wave emitting part and the sound wave receiving part are respectively mounted on the mounting blocks. The mounting block can increase the coupling effect between the sound wave emitting part and the sound wave receiving part and the pipe body, so that the detection of the characteristic frequency of the heater assembly is more accurate.

Preferably, the installation block is located on a side of the water outlet close to the installation cover. Because tap water flows in from the end of the heating cylinder close to the installation cover, flows out from one end into the pipe body and then flows out from the water outlet. During this process, in order to avoid the installation block from affecting the flow of hot water, the installation block is arranged at the water inlet.

Preferably, the mounting blocks are located on opposite sides of the tube body, which can avoid the mutual interference between the sending and receiving of sound waves, and can make the sound wave receiving part receive the vibration mode characteristic frequency of the vibration of the whole heating tube assembly as far as possible. .

Preferably, the vibration generator is ring-shaped and attached to the inner wall of the pipe body, and the radial section of the pipe body at this position can receive a balanced vibration force, so that the vibration effect of the heater assembly is better.

Preferably, the sewage outlet is equipped with a sewage pipe, and a solenoid valve is installed on the sewage pipe. When discharging sewage, open the electromagnetic valve, and turn off the electromagnetic valve to close the sewage pipe during normal use, so that hot water will not leak from the sewage pipe.

A toilet, comprising a casing, a heater assembly, a distributor, a washer assembly, and a main control board, wherein the heater assembly, the distributor, and the washer assembly communicate in sequence and are all connected to the bottom shell , the heater assembly is the above-mentioned heater assembly, and the sound wave emitting part, the sound wave receiving part and the vibration generator are all electrically connected to the main control board.

In this scheme, the hot water generated by the heater assembly enters the different water components of the washer assembly through the distributor, and the dirt discharged from the heater assembly can be directly discharged into the toilet bowl, and can be discharged together with the excrement. washed away.

The heater assembly is installed in the toilet and connected with other components, which is inconvenient for consumers to disassemble and clean, and the cleaning and maintenance after the toilet is installed in the bathroom will also cause great costs to the manufacturer. Therefore, the heater assembly with this structure The purpose of cleaning dirt can be achieved without disassembly, which greatly improves the convenience of cleaning and maintenance.

Preferably, the distributor communicates with the water outlet; the distributor includes a water diversion part, a water diversion mechanism and a drive motor connected to the water diversion part; a water inlet is provided on one side of the water diversion part , the other side is provided with a first water diversion outlet and a second water diversion outlet, the water diversion part is provided with a cavity, and the water inlet, the first water diversion outlet and the second water diversion outlet are all communicated To the cavity; the water distribution mechanism is arranged in the cavity, the water distribution mechanism includes a water distribution plate connected to the output shaft of the drive motor, and the water distribution plate is provided with a communication hole; If the communication hole is in communication with the first water diversion outlet or the second water diversion outlet, either of them is in the state of communicating with the cavity, otherwise it is in the state of being blocked. The hot water at the water outlet enters the cavity of the water diversion part through the water inlet. At this time, if it is necessary to discharge water from the first water diversion outlet, the water diversion plate is driven to rotate by the drive motor until the communication hole communicates with the first water diversion outlet. If it is necessary to discharge water from the second water diversion outlet, the water diversion plate is driven by the drive motor to rotate until the communication hole communicates with the second water diversion outlet. If the supply of hot water is stopped to the washer, then the communicating hole is neither communicated with the first water-dividing outlet nor communicated with the second water-dividing outlet.

A method for cleaning a heater assembly. A detector and a vibration generator for detecting the characteristic frequency of the vibration mode of the heater are installed in the heater assembly respectively; The characteristic frequency of the vibration mode is recorded as the characteristic frequency of the unscaled state; in the process of using the heater, the vibration mode characteristic frequency in a certain frequency band of the current state of the heater is detected by the detector and recorded as the measured characteristic frequency, and the measured characteristic frequency is compared. If the frequency and the characteristic frequency of the clean state show that there is an offset; then start the vibration generator and make the vibration generator vibrate at the measured characteristic frequency.

It is judged whether there is dirt by whether the characteristic frequency of the vibration mode before and after the heater is shifted, and then by causing two different resonance modes of the heater assembly, the combination of different vibration modes such as longitudinal, transverse or bending can be used to remove dirt. .

Preferably, the detector is an ultrasonic transducer that is self-sending, self-receiving or separated from sending and receiving, and detects the vibration modal characteristic frequency within a certain frequency band of the heater assembly by emitting frequency-sweeping ultrasonic waves to the heater assembly; the vibration generator It is a vibration generator; by using the measured characteristic frequency as the transmission frequency to emit ultrasonic waves to the heater assembly.

Compared with the prior art, the beneficial effect of the present invention is that the first ultrasonic transducer and the vibration generator cause the heater assembly to produce different resonance modes after the first ultrasonic transducer is used to detect whether the heater assembly has dirt To make the dirt in the heater assembly peel off to clean the heater assembly to ensure that the heating performance of the heater assembly is stable.

The heater assembly installed in the toilet can be automatically cleaned without being disassembled, which improves the convenience of cleaning and maintenance of the heater assembly.

Description of drawings

Fig. 1 is a structural schematic diagram of an existing heater assembly;

Fig. 2 is a schematic structural view of a heater assembly of the present invention;

Fig. 3 is the sectional view of A-A direction of Fig. 1;

Fig. 4 is the sectional view of A-A direction of Fig. 2;;

Fig. 5 is the structural representation of blowdown pipe of the present invention;

Fig. 6 is a schematic diagram of the connection structure of the internal components of a toilet according to the present invention;

Fig. 7 is a schematic structural view of the dispenser of the present invention;

Fig. 8 is a schematic structural view of the water separating tray of the present invention.

Detailed ways

The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate this embodiment, certain components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable that some well-known structures and descriptions thereof may be omitted in the drawings. The positional relationship described in the drawings is for illustrative purposes only, and should not be construed as a limitation on this patent.

In the drawings of the embodiments of the present invention, the same or similar symbols correspond to the same or similar components; The orientation or positional relationship indicated by "long" and "short" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific Orientation, construction and operation in a specific orientation, so the terms describing the positional relationship in the drawings are for illustrative purposes only, and should not be construed as limitations on this patent. For those of ordinary skill in the art, it can be understood according to specific circumstances The specific meaning of the above terms.

Below by specific embodiment, in conjunction with accompanying drawing, the technical solution of the present invention is described in further detail:

Example 1

As shown in Figure 1, it is an embodiment of a heater assembly, including a tube body 1, a heating cylinder 2 and an installation cover 3, the heating cylinder 2 is loaded into the tube body 1 through the installation cover 3, and both ends of the heating cylinder 2 are provided with Opening, the heating cylinder 2 is provided with a heating body 201, the pipe body 1 is provided with a water outlet 101, and the pipe body 1 is also provided with a sewage outflow port 102; the pipe body 1 is equipped with a first ultrasonic transducer and a vibration generator 4 ; The first ultrasonic transducer includes a sound wave emitting part 5 and a sound wave receiving part 6 .

Specifically, the inner wall of the pipe body 1 is provided with two installation blocks 7 , and the sound wave emitting part 5 and the sound wave receiving part 6 are installed on the installation blocks 7 respectively. The mounting block 7 can increase the coupling effect between the sound wave emitting part 5 and the sound wave receiving part 6 and the pipe body 1, so that the detection of the characteristic frequency of the heater assembly is more accurate. In this embodiment, the installation block 7 is located on the side of the water outlet 101 close to the installation cover 3 . Because tap water flows in from one end of the heating cylinder 2 close to the installation cover 3, flows out from one end into the pipe body 1 and then flows out from the water outlet 101, during this process, in order to prevent the installation block 7 from affecting the flow of hot water, the installation block 7 is arranged in the water end. The mounting blocks 7 are located on the opposite sides of the tube body 1, which can avoid the mutual interference between the sending and receiving of sound waves, and can make the sound wave receiving part 6 receive the vibration modal characteristic frequency of the vibration of the whole heating tube assembly as far as possible.

Further, the vibration generator 4 is ring-shaped and attached to the inner wall of the pipe body 1, and the radial section of the pipe body 1 there can receive a balanced vibration force, so that the vibration effect of the heater assembly is better.

In addition, the sewage outflow port 102 is equipped with a sewage discharge pipe 8 , and a solenoid valve 9 is installed on the sewage discharge pipe 8 . When carrying out blowdown, open electromagnetic valve 9, when using normally, close electromagnetic valve and close blowdown pipe 8, hot water can not leak from blowdown pipe 8.

Working principle or workflow of the present embodiment: the heater assembly is used in the toilet, and the sound wave emitting part 5, the sound wave receiving part 6 and the vibration generator 4 are all connected with the controller of the toilet seat, and the sound wave emitting part 5 and the vibration generator 4 vibrate, and the acoustic wave receiver 6 receives the characteristic frequency from the heater assembly. Tap water enters through an opening at one end of the cylinder body, and the water in the pipe body 1 becomes hot water through the heating effect of the heating body 201, and the hot water can flow out from the water outlet 101 into the washer assembly 12 of the toilet. Before using the heater assembly, the frequency-sweeping ultrasonic wave is emitted by the sound wave emitting part 5 , and the vibration mode characteristic frequency within a certain frequency band of the pipe body 1 is received by the sound wave receiving part 6 . During the use of the heater assembly, after a period of time, if dirt occurs, the sound wave emitting part 5 emits sweeping sound waves, and then receives the vibration modal characteristic frequency of the pipe body 1 in a certain frequency range through the sound wave receiving part 6, If the frequency of the front and rear two shifts, it means that there is dirt in the heater assembly. At this time, the vibration generator 4 uses the vibration mode characteristic frequency obtained before using the heater assembly as the transmission frequency to send ultrasonic waves to the pipe body 1. , causing the heater assembly to produce different resonance modes, so as to realize the combined action of different vibration forms such as longitudinal, lateral or bending to peel off the dirt in the heater assembly to realize the removal of dirt, and the dirt flows out through the sewage outlet 102 .

Beneficial effects of this embodiment: After the first ultrasonic transducer detects whether the heater assembly has dirt, the first ultrasonic transducer and the vibration generator 4 cause the heater assembly to produce different resonance modes to make the heater assembly The dirt is peeled off to clean the heater assembly to ensure the stable heating performance of the heater assembly. The heater assembly installed in the toilet can be automatically cleaned without being disassembled, which improves the convenience of cleaning and maintenance of the heater assembly.

Example 2

An embodiment of a toilet, comprising a casing 10, the heater assembly of Embodiment 1, a distributor 11, a washer assembly 12 and a main control board, the heater assembly, the distributor 11 and the washer assembly 12 are connected in sequence and all Connected to the bottom shell, the heater assembly is the above-mentioned heater assembly, and the sound wave emitting part 5, the sound wave receiving part 6 and the vibration generator 4 are all electrically connected to the main control board.

In this embodiment, the main control board is provided with two ultrasonic generating units, which are connected to the acoustic wave transmitting wave and the vibration generator 4 respectively. The high-frequency alternating current signal matched with the transducer drives the ultrasonic transducer to work. The active board is also provided with a frequency comparison unit to compare the characteristic frequency changes before and after the sound wave receiving part 6 .

Further, the distributor 11 communicates with the water outlet 101; the distributor 11 includes a water dividing part 1101, a water dividing mechanism and a drive motor 1102 connected with the water dividing part 1101; one side of the water dividing part 1101 is provided with a water inlet 1111, and the other One side is provided with a first water diversion outlet 1112 and a second water diversion outlet 1113, the water diversion part 1101 is provided with a cavity, and the water inlet 1111, the first water diversion outlet 1112 and the second water diversion outlet 1113 are all connected to the cavity; The water distribution mechanism is arranged in the cavity, and the water distribution mechanism includes a water distribution plate 1103 connected with the output shaft of the drive motor 1102, and the water distribution plate 1103 is provided with a communication hole 1131; if the communication hole 1131 is connected to the first water distribution outlet 1112 or If the second water-dividing outlet 1113 is connected, either of them is in the state of communicating with the cavity, otherwise it is in the state of being blocked. The hot water in the water outlet 101 enters into the cavity of the water diversion part 1101 through the water inlet 1111. At this time, if the first water diversion outlet 1112 is required to discharge water, the drive motor 1102 drives the water diversion plate 1103 to rotate to the communication hole 1131 and The first water diversion outlet 1112 is connected. If the second water diversion outlet 1113 is required to discharge water, the drive motor 1102 drives the water diversion plate 1103 to rotate until the communication hole 1131 communicates with the second water diversion outlet 1113 . If the supply of hot water is stopped to the washer, then the communication hole 1131 is neither communicated with the first water-dividing outlet 1112 nor communicated with the second water-dividing outlet 1113 .

In this scheme, the hot water produced by the heater assembly enters the different water parts of the washer assembly 12 through the distributor 11, and the dirt discharged from the heater assembly can be directly discharged into the toilet body, and can be discharged along with the excrement. washed away together.

The heater assembly is installed in the toilet and connected with other components, which is inconvenient for consumers to disassemble and clean, and the cleaning and maintenance after the toilet is installed in the bathroom will also cause great costs to the manufacturer. Therefore, the heater assembly with this structure The purpose of cleaning dirt can be achieved without disassembly, which greatly improves the convenience of cleaning and maintenance.

Example 3

An embodiment of a cleaning method for a heater assembly, the method can be used for automatic cleaning of the heater assembly in Embodiment 1 and Embodiment 2. A detector and a vibration generator for detecting the vibration mode characteristic frequency of the heater are respectively installed in the heater assembly; the vibration mode characteristic frequency of the heater in a certain frequency band is detected by the detector and recorded as no In the process of using the heater, the vibration mode characteristic frequency in a certain frequency band of the current state of the heater is detected by the detector and recorded as the measured characteristic frequency, and compared with the measured characteristic frequency and the non-scale state characteristic frequency, if The two display offset; then start the vibration generator, and make the vibration generator vibrate at the measured characteristic frequency.

It is judged whether there is dirt by whether the characteristic frequency of the vibration mode before and after the heater is shifted, and then by causing two different resonance modes of the heater assembly, the combination of different vibration modes such as longitudinal, transverse or bending can be used to remove dirt. .

In an embodiment, the detector is an ultrasonic transducer that is self-sending, self-receiving or separated from sending and receiving, specifically sending and receiving separated ultrasonic waves, and detecting the vibration modal characteristics of the heater assembly within a certain frequency band by emitting frequency-sweeping ultrasonic waves to the heater assembly frequency; the vibration generator is an ultrasonic transducer; the ultrasonic wave is sent to the heater assembly by using the measured characteristic frequency as the emission frequency.

Beneficial effects of this embodiment: After ultrasonic detection of whether the heater assembly has dirt, the vibration generator causes the heater assembly to produce different resonance modes, so that the dirt in the heater assembly is peeled off to clean the heater assembly, ensuring heating The heating performance of the heater assembly is stable.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. A heater assembly, comprising a tube body (1), a heating cylinder (2) and an installation cover (3), the heating cylinder (2) is loaded into the tube body (1) through the installation cover (3) , both ends of the heating cylinder (2) are provided with openings, the heating cylinder (2) is provided with a heating body (201), and the pipe body (1) is provided with a water outlet (101), characterized in that, The pipe body (1) is also provided with a sewage outlet (102); a first ultrasonic transducer and a vibration generator (4) are installed in the pipe body (1); the first ultrasonic transducer It includes a sound wave emitting part (5) and a sound wave receiving part (6). 2. A heater assembly according to claim 1, characterized in that two installation blocks (7) are arranged on the inner wall of the pipe body (1), and the sound wave emitting part (5) and the sound wave receiving part (6) are respectively installed on the installation blocks (7). 3. The heater assembly according to claim 2, characterized in that the installation block (7) is located on a side of the water outlet (101) close to the installation cover (3). 4. The heater assembly according to claim 2, characterized in that, the mounting blocks (7) are located on opposite sides of the tube body (1). 5 . The heater assembly according to claim 1 , characterized in that, the vibration generator ( 4 ) is ring-shaped and attached to the inner wall of the pipe body ( 1 ). 6 . 6. A heater assembly according to claim 1, characterized in that, the sewage outlet (102) is equipped with a sewage discharge pipe (8), and a solenoid valve (9) is installed on the sewage discharge pipe (8) . 7. A toilet, comprising a housing (10), a heater assembly, a distributor (11), a washer assembly (12) and a main control board, the heater assembly, the distributor (11) and the The washer components (12) are sequentially connected and connected to the bottom shell, characterized in that the heater component is the heater component according to any one of claims 1-7, and the sound wave emitting part (5) . Both the sound wave receiving part (6) and the vibration generator (4) are electrically connected to the main control board. 8. The heater assembly according to claim 1, characterized in that, the distributor (11) communicates with the water outlet (101); the distributor (11) includes a water diversion part (1101) , a water distribution mechanism and a drive motor (1102) connected to the water distribution part (1101); one side of the water distribution part (1101) is provided with a water inlet (1111), and the other side is provided with a first water distribution outlet (1112) and the second water-splitting outlet (1113), the water-splitting part (1101) is provided with a cavity, the water inlet (1111), the first water-splitting outlet (1112) and the second The water distribution outlets (1113) are all connected to the cavity; the water distribution mechanism is arranged in the cavity, and the water distribution mechanism includes a water distribution pan ( 1103), the water diversion plate (1103) is provided with a communication hole (1131); if the communication hole (1131) is in communication with the first water diversion outlet (1112) or the second water diversion outlet (1113) then Either of the two is in the state of communicating with the cavity, otherwise it is in the state of being blocked. 9. A cleaning method for a heater assembly, characterized in that a detector and a vibration generator for detecting the vibration modal characteristic frequency of the heater are respectively installed in the heater assembly; The characteristic frequency of the vibration mode in a certain frequency band under the condition is recorded as the characteristic frequency of the clean state; in the process of using the heater, the vibration mode characteristic frequency in a certain frequency band of the current state of the heater is detected by the detector and recorded as the actual measurement The characteristic frequency is compared with the measured characteristic frequency and the characteristic frequency of the clean state. If the two display offset; start the vibration generator and make the vibration generator vibrate at the measured characteristic frequency. 10. A cleaning method for a heater assembly according to claim 9, characterized in that the detector is an ultrasonic transducer that is self-generating, self-receiving, or separated from sending and receiving, and is detected by emitting frequency-sweeping ultrasonic waves to the heater assembly. The characteristic frequency of the vibration mode in a certain frequency band of the heater assembly; the vibration generator is an ultrasonic transducer; the ultrasonic wave is sent to the heater assembly by using the measured characteristic frequency as the transmission frequency.

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