CN107422396B - Foreign matter detection system, foreign matter detection method and heating and ventilation equipment - Google Patents
Foreign matter detection system, foreign matter detection method and heating and ventilation equipment Download PDFInfo
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- CN107422396B CN107422396B CN201710613026.7A CN201710613026A CN107422396B CN 107422396 B CN107422396 B CN 107422396B CN 201710613026 A CN201710613026 A CN 201710613026A CN 107422396 B CN107422396 B CN 107422396B
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract
The invention provides a foreign matter detection system, a method and heating and ventilation equipment, wherein the foreign matter detection system comprises: at least one signal processing device, including a signal generator for emitting analog signals outwards and a signal receiver for receiving the reflected analog signals; the microcontroller is electrically connected with the signal processing device and controls the signal generator to send out analog signals at preset time intervals; the timer is used for determining a first time for sending the analog signal and a second time for receiving the analog signal, and sending the first time and the second time to the microcontroller; and the display device is used for displaying prompt information corresponding to the distance between the signal generator and the reflector. According to the technical scheme, the safety alarm prompt is carried out by displaying the prompt information corresponding to the distance information, so that the possibility of poor heat exchange of the unit caused by the blockage of the heat exchanger by large-area foreign matters is reduced, a user is reminded of cleaning in time, and the user experience is improved.
Description
Technical Field
The invention relates to the field of heating and ventilation equipment, in particular to a foreign matter detection system, a foreign matter detection method, heating and ventilation equipment, computer equipment and a computer readable storage medium.
Background
For heating and ventilation equipment, the installation and operation environment has great influence on the safety, reliability and energy-saving performance of the equipment. Like in the north because the influence of foreign matters such as haze, dust, plant leaf, seed can form filth stifled thing on warm equipment heat exchanger (condenser) that leads to, can influence outdoor heat exchanger's heat exchange efficiency after accumulating to a certain degree to reduce the efficiency output of equipment, increase the energy consumption, the extravagant energy. In addition, the dirty blockage increases the load of the machine, so that the reliability of the machine is reduced, the service life is shortened, and the safety performance is also reduced to a great extent. Therefore, the filth of the outdoor heat exchanger needs to be detected at any time, but no good filth detection method exists at present, and detection and maintenance cannot be performed after the heating and ventilation equipment is installed and debugged successfully.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, an object of the present invention is to propose a foreign object detection system.
It is still another object of the present invention to provide a foreign object detection method.
It is still another object of the present invention to provide an apparatus for heating and ventilating.
It is a further object of the invention to propose a computer device.
It is yet another object of the present invention to provide a computer-readable storage medium.
In view of this, the technical solution of the first aspect of the present invention provides a foreign object detection system, including: the signal processing device is arranged on a shell of the heating and ventilating equipment or a heat exchanger of the heating and ventilating equipment and comprises a signal generator used for sending an analog signal outwards and a signal receiver used for receiving the analog signal reflected by a reflector; the microcontroller is electrically connected with the signal processing device and sends an electric signal to the signal generator at preset time intervals to control the signal generator to send an analog signal outwards; the timer is electrically connected with the signal processing device and the microcontroller, determines a first moment when the analog signal is sent out and a second moment when the analog signal is received, and sends the first moment and the second moment to the microcontroller; and the display device is electrically connected with the microcontroller, the microcontroller responds to the time length between the first moment and the second moment to determine the distance information between the signal generator and the reflector, and the display device is used for displaying prompt information corresponding to the distance information.
In the technical scheme, the foreign matter detection system comprises at least one signal processing device, a microcontroller, a timer and a display device, wherein the microcontroller controls a signal generator to outwards send an analog signal at a preset interval, the analog signal is transmitted in a medium (air) at a certain transmission speed, the analog signal can be reflected at the same speed when encountering a reflector, such as a wall surface, a dirty object, ice and other foreign matters, the timer determines a first moment for sending the analog signal, the signal receiver receives the analog signal reflected by the reflector, the timer determines a second moment for receiving the analog signal, the timer sends the determined first moment and second moment to the microcontroller, and the microcontroller determines distance information between the signal generator and the reflector according to the duration between the first moment and the second moment and the transmission speed of the analog signal in the medium, microcontroller control display device shows the prompt message corresponding to distance information, realizes the affirmation of reflector and signal generator distance and then judges the kind of reflector and show the prompt message corresponding to distance information, carries out the safe alarm suggestion, has reduced because of the bad possibility of unit heat transfer that large tracts of land foreign matter blockked up the heat exchanger and leads to, reminds the user in time to wash, has promoted user experience.
It should be noted that, according to the difference of the installation positions of the signal generators, the foreign matter detection system can measure the distance between the unit and the wall surface, reduce the possibility that the installation distance between the unit and the wall surface is too short, and simultaneously can detect dirty and blocked objects on the heat exchanger to remind a user of timely cleaning.
The microcontroller, the timer and the display device can be combined and integrated at will.
In addition, it should be noted that, according to the difference of the installation positions of the signal generators, the corresponding preset time intervals can be set according to the situation, for example, after the installation and debugging of the heating and ventilation equipment are finished, whether the installation distance is proper or not is judged, the distance between the unit or the heat exchanger and the reflector is detected within 5min of electrification in real time, for example, when the heating and ventilation equipment works in a preset mode, whether a large-area foreign matter is too close to the heat exchanger or not is judged, the set time interval is slightly longer, the preset interval is set, for example, 2h, an analog signal is sent outwards, and the distance between the unit or the heat exchanger and the reflector is detected; when detecting the fine filth, setting a preset time interval such as 720h to send an analog signal outwards, detecting whether the fine filth with a certain thickness is formed on the outdoor heat exchanger, and when judging the thickness of the frost ice, sending the analog signal outwards according to the outdoor temperature value and the judgment moment determined by the defrosting logic, and judging whether the thickness of the frost ice needs to execute defrosting operation.
In addition, the prompt information corresponding to the distance information displayed by the display device includes, but is not limited to, characters, icons, and combinations of characters and icons.
The foreign body detection system can also be provided with an audio module for playing audio corresponding to the prompt message.
In addition, it should be noted that the analog signal includes, but is not limited to, one or a combination of the following: sound wave, electromagnetic wave, the signal generator can send out the corresponding analog signal, and the signal receiver is preferably the sensor that can receive the corresponding analog signal type.
In the above technical solution, preferably, the signal processing apparatus further includes: and the analog-to-digital converter is electrically connected with the signal generator, the signal receiver and the microcontroller and is used for converting the analog signal into a pulse signal and sending the pulse signal to the microcontroller.
In the technical scheme, the analog signal is converted into the pulse signal through the analog-to-digital converter, the pulse signal sent by the microcontroller is converted into the analog signal through the analog-to-digital converter and sent out through the signal generator, the reflected analog signal received by the signal receiver is converted into the pulse signal through the analog-to-digital converter and sent to the microcontroller, and the microcontroller is convenient to recognize and confirm the pulse signal.
In the above technical solution, preferably, the method further includes: and the first switch pieces are connected with a circuit where the signal generator is positioned in response to the electric signal of the microcontroller for transmitting the analog signal outwards.
In the technical scheme, each first switch piece is connected with the signal generator in series, and the connection and disconnection of a circuit where the signal generator is located can be controlled by controlling the switch pieces, so that whether the signal generator sends an analog signal or not is controlled.
Wherein, preferably, the first switch member is an electromagnetic relay.
In any of the above technical solutions, preferably, the method further includes: and the second switching elements are connected with the signal receiver in series and are used for responding to the electric signal of the microcontroller to communicate with a circuit where the signal receiver is positioned for receiving the reflected analog signal.
In the technical scheme, each second switch piece is connected with the signal generator in series, and the connection and disconnection of the circuit where the signal receiver is located can be controlled by controlling the switch pieces, so that whether the signal receiver receives the reflected analog signals or not is controlled.
Wherein, preferably, the second switch member is an electromagnetic relay.
The technical scheme of the second aspect of the invention provides a foreign matter detection method for heating and ventilation equipment, which comprises the following steps: sending a first analog signal outwards at a first preset interval and determining a first moment for sending the first analog signal; receiving a first analog signal reflected by the first reflector and determining a second moment of receiving the first analog signal; determining a first time interval between a first time and a second time; determining a first distance value between the first reflector and the heating and ventilating device according to the first time interval; and displaying prompt information corresponding to the first distance value or the first preset interval.
In the technical scheme, a first analog signal is sent outwards at a first preset interval, the first analog signal is transmitted in a medium (air) at a certain transmission speed, the analog signal is reflected at the same speed when encountering a reflector, such as foreign matters on a wall surface, a dirty object, frost and the like, the first moment of sending the first analog signal is determined, the first analog signal reflected by the first reflector is received, the second moment of receiving the first analog signal is determined, the first time interval between the first moment and the second moment is determined according to the first time interval and the transmission speed of the first analog signal in the medium, the distance information between the heating and ventilation equipment and the reflector is determined according to the first time interval and the transmission speed of the first analog signal in the medium, the prompt information corresponding to the distance information is displayed, the determination of the distance of the reflector from a signal generator is realized, the type of the reflector is further determined, and the prompt information corresponding to the distance information is displayed, carry out safe alarm suggestion, reduced because of the bad possibility of unit heat transfer that the heat exchanger leads to is blockked up to large tracts of land foreign matter, remind the user in time to wash, promoted user experience.
It should be noted that, the foreign matter detection method can realize measuring the distance between the unit and the wall surface, reduce the possibility of too short installation distance between the unit and the wall surface, and simultaneously can realize detection of fine and dirty blocking objects on the heat exchanger to remind a user of timely cleaning.
In addition, it should be noted that the first preset time interval may be set according to actual conditions, for example, after the installation and debugging of the heating and ventilation equipment are finished, whether the installation distance is appropriate is judged, the distance between the unit or the heat exchanger and the reflector is detected in real time within 5min after power-on, for example, when the heating and ventilation equipment works in a preset mode, whether a large-area foreign object is too close to the heat exchanger is judged, the set time interval is slightly longer, the preset interval is set, for example, 2h, an analog signal is sent outwards, and the distance between the unit or the heat exchanger and the reflector is detected; when detecting the fine filth, setting a preset time interval such as 720h to send an analog signal outwards, detecting whether the fine filth with a certain thickness is formed on the outdoor heat exchanger, and when judging the thickness of the frost ice, sending the analog signal outwards according to the outdoor temperature value and the judgment moment determined by the defrosting logic, and judging whether the thickness of the frost ice needs to execute defrosting operation.
In addition, it should be noted that the displayed prompt information corresponding to the distance information includes, but is not limited to, characters, icons, and combinations of characters and icons.
In addition, it should be noted that the analog signal includes, but is not limited to, one or a combination of the following acoustic waves and electromagnetic waves.
In the foregoing technical solution, preferably, displaying the prompt information corresponding to the first distance value or the first preset interval specifically includes: determining a first distance threshold corresponding to a first preset interval according to the first preset interval; and when the first distance value is not greater than the first distance threshold value, controlling the heating and ventilating equipment to display second prompt information corresponding to the first distance threshold value.
In the technical scheme, after the first distance value is determined, the first distance value is compared with a first distance threshold value corresponding to a first preset interval, if the first distance value is smaller than or equal to the first distance threshold value, the fact that the distance between the first reflector and the heating and ventilation equipment is too short at the moment is demonstrated, the heating and ventilation equipment is controlled to display second prompt information corresponding to the first distance threshold value, safety alarm prompt is conducted on a user, the possibility of poor unit heat exchange caused by the fact that foreign matters block the heating and ventilation equipment is reduced, the user is reminded of timely cleaning, and user experience is improved.
In the above technical solution, preferably, the method further includes: after the first distance value is determined to be not larger than the first distance threshold value, a second analog signal is sent outwards at a second preset interval, and a third moment when the second analog signal is sent out is determined; receiving a second analog signal reflected by the second reflector and determining a fourth moment of receiving the second analog signal; determining a second time interval for sending the second analog signal and receiving the second analog signal according to the third time and the fourth time; and determining a second distance value between the second reflector and the heating and ventilating device according to the second time interval, and stopping displaying the second prompt message until the second distance value is greater than the first distance threshold value.
In the technical scheme, when the first distance value is not greater than the first distance threshold value, it is indicated that the distance between the first reflector and the heating and ventilation device is too short, the second prompt message is displayed, the user is reminded to process, meanwhile, the distance between the second reflector and the heating and ventilation device is continuously determined until the second distance value is greater than the first distance threshold value, it is indicated that the distance between the heating and ventilation device and the foreign matter is proper, the normal work of the heating and ventilation device cannot be influenced, the user performs the processing work, and at this moment, the display of the second prompt message is stopped.
In the above technical solution, preferably, the method further includes: judging whether the first reflector belongs to a preset defrosting object or not, and generating a judgment result; and if so, executing defrosting operation after displaying prompt information corresponding to the first distance value or the first preset interval.
According to the technical scheme, whether the first reflector belongs to a preset defrosting object or not is judged according to defrosting time determined by an outdoor temperature value and a defrosting logic together, a judgment result is generated, the fact that the thickness of frost ice is determined by determining the distance between the first reflector and heating and ventilation equipment so as to determine whether defrosting operation needs to be executed or not is achieved, if the judgment result is yes, it is indicated that the thickness of the frost ice at the moment influences normal work of the heating and ventilation equipment, the defrosting operation is executed after prompt information corresponding to a first distance value or a first preset interval is displayed, accuracy of defrosting judgment is improved, and the possibility of frost-free defrosting is reduced.
It should be noted that, after the defrosting operation is finished, the distance between the reflector and the heating and ventilation device may be determined continuously, and when the determined distance does not satisfy the preset threshold, it is determined that defrosting is not clean, and the heating and ventilation device is controlled to continue defrosting operation.
The third aspect of the present invention provides a heating and ventilation device, including: the foreign matter detection system according to any one of the above.
In the technical scheme, the heating and ventilation equipment comprising any foreign matter detection system can determine the distance between the reflector and the signal generator, further judge the type of the reflector and display the prompt message corresponding to the distance message, the initial working environment of the heating and ventilation equipment can be detected, so that whether the initial working environment meets the requirement of normal work of the heating and ventilation equipment can be judged, problems possibly occurring in the operation process of the heating and ventilation equipment can be detected and early warning can be timely made, so that the heating and ventilation equipment can be timely maintained, the fault rate of the heating and ventilation equipment is reduced, and the service life of the heating and ventilation equipment is prolonged.
The heating and ventilation device includes, but is not limited to, an air conditioner, a ventilation duct, a radiator, an electric heating device, or any device related to heating and ventilation.
The technical solution of the fourth aspect of the present invention provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to perform any one of the above-mentioned foreign object detection methods.
In the technical scheme, a computer program for executing the foreign matter detection method is stored in a memory, and when the processor executes the computer program, the determination of the distance between the reflector and the signal generator can be realized, the type of the reflector is judged, and prompt information corresponding to the distance information is displayed, so that the initial working environment of the equipment can be detected, whether the initial working environment meets the requirement of normal working of the equipment is judged, problems possibly occurring in the running process of the equipment can be detected, early warning is timely given, the equipment is timely maintained, the failure rate of the equipment is reduced, and the service life of the equipment is prolonged.
An aspect of the fifth aspect of the present invention provides a computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the foreign object detection method of any one of the above.
In this embodiment, the processor needs to implement the foreign object detection method as described above by using a computer program, and such a computer program needs to be stored in a computer-readable medium. The computer readable medium ensures that the computer program can be executed by the processor, thereby realizing the determination of the distance between the reflector and the signal generator, further judging the type of the reflector and displaying the prompt information corresponding to the distance information, not only being capable of detecting the initial working environment of the equipment so as to judge whether the initial working environment meets the requirement of normal work of the equipment, but also being capable of detecting the problems possibly occurring in the running process of the equipment and giving early warning in time so as to maintain the equipment in time, reduce the failure rate of the equipment and prolong the service life of the equipment.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 illustrates a schematic structural diagram of a foreign object detection system according to an embodiment of the present invention;
FIG. 2 shows a schematic flow diagram of a foreign object detection method according to an embodiment of the invention;
fig. 3 illustrates a schematic configuration of an air heating and ventilating apparatus according to an embodiment of the present invention;
fig. 4 shows a schematic structural diagram of a computer device according to an embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Fig. 1 shows a schematic configuration diagram of a foreign object detection system according to an embodiment of the present invention.
As shown in fig. 1, the foreign object detection system includes:
at least one signal processing device 102, disposed on a housing of the heating and ventilating apparatus or a heat exchanger of the heating and ventilating apparatus, wherein the signal processing device 102 includes a signal generator 1022 for emitting an analog signal outwards and a signal receiver 1024 for receiving the analog signal reflected by a reflector;
the microcontroller 104 is electrically connected with the signal processing device 102, and the microcontroller 104 sends an electric signal to the signal generator 1022 at preset time intervals to control the signal generator 1022 to send an analog signal outwards;
the timer 106 is electrically connected with the signal processing device 102 and the microcontroller 104, the timer 106 determines a first time point of sending an analog signal outwards and a second time point of receiving the analog signal, and the first time point and the second time point are sent to the microcontroller 104;
and the display device 108 is electrically connected with the microcontroller 104, the microcontroller 104 determines the distance information between the signal generator and the reflector in response to the time length between the first time and the second time, and the display device 108 is used for displaying prompt information corresponding to the distance information.
In this embodiment, the foreign object detection system includes at least one signal processing device 102, a microcontroller 104, a timer 106 and a display device 108, the microcontroller 104 controls a signal generator 1022 to emit an analog signal at a predetermined interval, the analog signal is transmitted in a medium (air) at a certain transmission speed, the analog signal is reflected at the same speed when encountering a reflective object, such as a wall surface, a dirty object, frost, or other foreign object, the timer 106 determines a first time when the analog signal is emitted, the signal receiver 1024 receives the analog signal reflected by the reflective object, the timer 106 determines a second time when the analog signal is received, the timer 106 sends the determined first time and second time to the microcontroller 104, the microcontroller 104 determines distance information between the signal generator 1022 and the reflective object according to a time length between the first time and the second time and a transmission speed of the analog signal in the medium, microcontroller control display device 108 shows the prompt message corresponding to distance information, realizes the affirmation of reflector and signal generator 1022 distance and then judges the kind of reflector and show the prompt message corresponding to distance information, carries out the safe alarm suggestion, has reduced because of the bad possibility of unit heat transfer that large tracts of land foreign matter blockked up the heat exchanger and leads to, reminds the user in time to wash, has promoted user experience.
It should be noted that, according to the difference of the installation positions of the signal generator 1022, the foreign matter detection system can measure the distance from the unit to the wall surface, reduce the possibility that the installation distance between the unit and the wall surface is too short, and simultaneously can detect fine and dirty objects on the heat exchanger to remind a user of cleaning in time.
In addition, it should be noted that, according to the different installation positions of the signal generator 1022, the corresponding preset time interval may be set according to the situation, for example, after the installation and debugging of the heating and ventilation device are finished, whether the installation distance is appropriate is judged, the distance from the unit or the heat exchanger to the reflector is detected within 5min of power-on, for example, when the heating and ventilation device works in a preset mode, whether a large area of foreign matter is too close to the heat exchanger is judged, the set time interval is slightly longer, the preset interval is set, for example, 2h, and an analog signal is sent outwards to detect the distance from the unit or the heat exchanger to the reflector; when detecting the fine filth, setting a preset time interval such as 720h to send an analog signal outwards, detecting whether the fine filth with a certain thickness is formed on the outdoor heat exchanger, and when judging the thickness of the frost ice, sending the analog signal outwards according to the outdoor temperature value and the judgment moment determined by the defrosting logic, and judging whether the thickness of the frost ice needs to execute defrosting operation.
In addition, the prompt information corresponding to the distance information displayed by the display device 108 includes, but is not limited to, characters, icons, and combinations of characters and icons.
The foreign body detection system can also be provided with an audio module for playing audio corresponding to the prompt message.
In addition, it should be noted that the analog signal includes, but is not limited to, one or a combination of sound wave and light wave.
In the above embodiment, preferably, the signal processing apparatus 102 further includes: and the analog-to-digital converter is electrically connected with the signal generator 1022, the signal receiver 1024 and the microcontroller 104, and is used for converting the analog signal into a pulse signal and sending the pulse signal to the microcontroller 104.
In this embodiment, the analog signal is converted into a pulse signal by an analog-to-digital converter, the pulse signal sent by the microcontroller 104 is converted into an analog signal by the analog-to-digital converter, and sent out by the signal generator 1022, and the reflected analog signal received by the signal receiver 1024 is converted into a pulse signal by the analog-to-digital converter and sent to the microcontroller 104.
In the above embodiment, preferably, the method further includes: at least one first switching element, each of which is connected in series with the signal generator 1022, the first switching element communicating with a circuit in which the signal generator 1022 is located in response to an electrical signal of the microcontroller 104 for emitting an analog signal to the outside.
In this embodiment, each first switch element is connected in series with the signal generator 1022, and the control of the switch element can control the connection and disconnection of the circuit where the signal generator 1022 is located, so as to control whether the signal generator 1022 sends out the analog signal.
Wherein, preferably, the first switch member is an electromagnetic relay.
In the above embodiment, preferably, the method further includes: at least one second switch, each second switch being connected in series with the signal receiver 1024, the second switch being responsive to an electrical signal of the microcontroller 104 to communicate with a circuit in which the signal receiver 1024 is located for receiving the reflected analog signal.
In this embodiment, each second switch element is connected in series with the signal generator 1022, and the control of the switch element can control the connection and disconnection of the circuit where the signal receiver 1024 is located, so as to control whether the signal receiver 1024 receives the reflected analog signal.
Wherein, preferably, the second switch member is an electromagnetic relay.
The first embodiment is as follows:
adopt piezoceramics transducer and transducer signal processing chip and ultrasonic emission circuit and ultrasonic receiving circuit to realize signal processing device's effect, adopt the singlechip to realize microcontroller's effect, adopt the high accuracy time-recorder to realize timing device's effect, adopt human-machine interface to realize display device's effect, foreign matter detecting system is used for detecting warm logical equipment unit installation distance or whether as the panel beating that dismantles down, the leatheroid, when foreign matter such as plastic film blockked up the heat exchanger, can install piezoceramics on outdoor heat exchanger or warm logical equipment shell panel beating.
After the installation and debugging of the heating and ventilation equipment are finished, the foreign matter detection system is set to be operated within 5min of electrification in real time.
The operation of the foreign object detection system comprises the following steps: the single chip microcomputer controls the transducer signal processing chip to be connected with the ultrasonic transmitting circuit at preset intervals to control the piezoelectric ceramic transducer to emit ultrasonic waves outwards, after the ultrasonic waves are transmitted, the transducer signal processing chip is connected with the ultrasonic receiving circuit to receive the reflected ultrasonic waves, the transducer signal processing chip can generate start/stop pulse signals at the moment of transmitting/receiving the ultrasonic waves, the high-precision timer determines the time for transmitting the ultrasonic waves and the time for receiving the ultrasonic waves through the start/stop pulse signals, the single chip microcomputer determines the time difference according to the time for transmitting the ultrasonic waves and the time for receiving the ultrasonic waves to further determine the distance between a reflector and the heating and ventilation equipment, and when the distance is smaller than a preset threshold value, the preset threshold value can be stored and set in advance, and prompt information corresponding to the fact that the heating and ventilation equipment is installed at a short distance is displayed.
The second embodiment is as follows:
adopt piezoceramics transducer and transducer signal processing chip and ultrasonic emission circuit and ultrasonic receiving circuit to realize signal processing device's effect, adopt the singlechip to realize microcontroller's effect, adopt the high accuracy time-recorder to realize timing device's effect, adopt human-machine interface to realize display device's effect, foreign matter detecting system is used for detecting warm logical equipment unit installation distance or whether as the panel beating that dismantles down, the leatheroid, when the foreign matter blocks up the heat exchanger such as plastic film, or detect after long-time operation like dust, the accumulation thickness of dirty stifled things such as catkin, or when detecting warm logical equipment and whether melting the frost and accomplish, piezoceramics needs the embedding to install inside warm logical equipment outdoor heat exchanger.
And operating the foreign matter detection system after the heating and ventilation equipment operates for 720 h.
The operation of the foreign object detection system comprises the following steps: the single chip microcomputer controls the transducer signal processing chip to be connected with the ultrasonic transmitting circuit at preset intervals to control the piezoelectric ceramic transducer to emit ultrasonic waves outwards, after the ultrasonic waves are transmitted, the transducer signal processing chip is connected with the ultrasonic receiving circuit to receive the reflected ultrasonic waves, the transducer signal processing chip can generate start/stop pulse signals at the moment of transmitting/receiving the ultrasonic waves, the high-precision timer determines the time for transmitting the ultrasonic waves and the time for receiving the ultrasonic waves through the start/stop pulse signals, the single chip microcomputer determines the time difference according to the time for transmitting the ultrasonic waves and the time for receiving the ultrasonic waves and further determines the distance between a reflector and the heating and ventilation equipment, and when the distance is smaller than a preset threshold value, the preset threshold value can be stored and set in advance, and prompt information corresponding to the fact that the heating and ventilation equipment is blocked by foreign matters is.
Fig. 2 shows a flow diagram of a foreign object detection method according to an embodiment of the invention.
As shown in fig. 2, the foreign object detection method includes:
step S202, a first analog signal is sent outwards at a first preset interval, and a first moment of sending the first analog signal is determined;
step S204, receiving a first analog signal reflected by the first reflector and determining a second moment for receiving the first analog signal;
step S206, determining a first time interval between the first time and the second time;
step S208, determining a first distance value between the first reflector and the heating and ventilating device according to the first time interval;
step S210, displaying a prompt message corresponding to the first distance value or the first preset interval.
In this embodiment, step S202 is to send out a first analog signal at a first preset interval, the first analog signal is transmitted in a medium (air) at a certain transmission speed, the analog signal is reflected at the same speed when encountering a reflector, such as a foreign object like a wall surface, a dirty object, and frost, a first time of sending the first analog signal is determined, step S204 is to receive the first analog signal reflected by the first reflector and determine a second time of receiving the first analog signal, step S206 is to determine a first time interval between the first time and the second time, step S208 is to determine distance information between the heating and ventilation equipment and the reflector according to the first time interval and the transmission speed of the first analog signal in the medium, step S210 is to display a prompt message corresponding to the distance message, to determine the distance between the reflector and further determine the type of the reflector and display a prompt message corresponding to the distance message, carry out safe alarm suggestion, reduced because of the bad possibility of unit heat transfer that the heat exchanger leads to is blockked up to large tracts of land foreign matter, remind the user in time to wash, promoted user experience.
It should be noted that, the foreign matter detection method can realize measuring the distance between the unit and the wall surface, reduce the possibility of too short installation distance between the unit and the wall surface, and simultaneously can realize detection of fine and dirty blocking objects on the heat exchanger to remind a user of timely cleaning.
In addition, it should be noted that the first preset time interval may be set according to actual conditions, for example, after the installation and debugging of the heating and ventilation equipment are finished, whether the installation distance is appropriate is judged, the distance between the unit or the heat exchanger and the reflector is detected in real time within 5min after power-on, for example, when the heating and ventilation equipment works in a preset mode, whether a large-area foreign object is too close to the heat exchanger is judged, the set time interval is slightly longer, the preset interval is set, for example, 2h, an analog signal is sent outwards, and the distance between the unit or the heat exchanger and the reflector is detected; when detecting the fine filth, setting a preset time interval such as 720h to send an analog signal outwards, detecting whether the fine filth with a certain thickness is formed on the outdoor heat exchanger, and when judging the thickness of the frost ice, sending the analog signal outwards according to the outdoor temperature value and the judgment moment determined by the defrosting logic, and judging whether the thickness of the frost ice needs to execute defrosting operation.
In addition, it should be noted that the displayed prompt information corresponding to the distance information includes, but is not limited to, characters, icons, and combinations of characters and icons.
In addition, it should be noted that the analog signal includes, but is not limited to, one or a combination of sound wave and light wave.
In the foregoing embodiment, preferably, in step S210, displaying the prompt information corresponding to the first distance value or the first preset interval includes: determining a first distance threshold corresponding to a first preset interval according to the first preset interval; and when the first distance value is not greater than the first distance threshold value, controlling the heating and ventilating equipment to display second prompt information corresponding to the first distance threshold value.
In this embodiment, after the first distance value is determined, the first distance value is compared with a first distance threshold value corresponding to a first preset interval, if the first distance value is not greater than the first distance threshold value, it is indicated that the distance between the first reflector and the heating and ventilation device is too short, the heating and ventilation device is controlled to display second prompt information corresponding to the first distance threshold value, a safety alarm prompt is performed on a user, the possibility of poor heat exchange of a unit caused by the fact that a foreign object blocks the heating and ventilation device is reduced, the user is reminded of cleaning in time, and user experience is improved.
In the above embodiment, preferably, the method further includes: after the first distance value is determined to be not larger than the first distance threshold value, a second analog signal is sent outwards at a second preset interval, and a third moment when the second analog signal is sent out is determined; receiving a second analog signal reflected by the second reflector and determining a fourth moment of receiving the second analog signal; determining a second time interval for sending the second analog signal and receiving the second analog signal according to the third time and the fourth time; and determining a second distance value between the second reflector and the heating and ventilating device according to the second time interval, and stopping displaying the second prompt message until the second distance value is greater than the first distance threshold value.
In this embodiment, when the first distance value is not greater than the first distance threshold value, it is indicated that the distance between the first reflector and the heating and ventilation device is too short, the second prompt message is displayed, the user is reminded to process the first distance value, and meanwhile, the distance between the second reflector and the heating and ventilation device is continuously determined until the second distance value is greater than the first distance threshold value, it is indicated that the distance between the heating and ventilation device and the foreign object is proper, the normal operation of the heating and ventilation device cannot be affected, the user has already performed processing work, and at this time, the display of the second prompt message is stopped.
In the above embodiment, preferably, the method further includes: judging whether the first reflector belongs to a preset defrosting object or not, and generating a judgment result; and if so, executing defrosting operation after displaying prompt information corresponding to the first distance value or the first preset interval.
In this embodiment, whether the first reflector belongs to a preset defrosting object or not is judged according to the defrosting time determined by the outdoor temperature value and the defrosting logic together, and a judgment result is generated, so that the effect of determining the thickness of the frost ice by determining the distance between the first reflector and the heating and ventilation equipment and further determining whether the defrosting operation needs to be executed or not is achieved, if the judgment result is yes, it is indicated that the thickness of the frost ice at the time affects the normal operation of the heating and ventilation equipment, the defrosting operation is executed after the prompt information corresponding to the first distance value or the first preset interval is displayed, the accuracy of defrosting judgment is improved, and the possibility of frost-free defrosting is reduced.
It should be noted that, after the defrosting operation is finished, the distance between the reflector and the heating and ventilation device may be determined continuously, and when the determined distance does not satisfy the preset threshold, it is determined that defrosting is not clean, and the heating and ventilation device is controlled to continue defrosting operation.
Fig. 3 illustrates a schematic structural view of an air heating and ventilating apparatus according to an embodiment of the present invention.
As shown in fig. 3, the heating and ventilating apparatus 30 includes:
and the foreign matter detection system 302 is used for detecting the distance between the reflector and the heating and ventilation equipment and displaying corresponding prompt information.
In this embodiment, the heating and ventilation device 30 including any foreign object detection system 302 can determine the distance between the reflector and the signal generator, and then determine the type of the reflector and display the prompt information corresponding to the distance information, which can detect the initial working environment of the heating and ventilation device, so as to determine whether the initial working environment meets the requirement of normal operation of the heating and ventilation device, and can also detect the possible problems in the operation process of the heating and ventilation device and make an early warning in time, so as to make timely maintenance on the heating and ventilation device, reduce the failure rate of the heating and ventilation device, and prolong the service life of the heating and ventilation device.
Fig. 4 shows a schematic structural diagram of a computer device according to an embodiment of the invention.
As shown in fig. 4, the computer apparatus 1 includes:
a memory 12, the memory 12 for storing a computer program;
a processor 14, the processor 14 being for executing a computer program stored in the memory;
the processor 14, when executing the computer program, performs the steps of:
sending a first analog signal outwards at a first preset interval and determining a first moment for sending the first analog signal; receiving a first analog signal reflected by the first reflector and determining a second moment of receiving the first analog signal; determining a first time interval between a first time and a second time; determining a first distance value between the first reflector and the heating and ventilating device according to the first time interval; and displaying prompt information corresponding to the first distance value or the first preset interval.
In this embodiment, a computer program for executing the foreign object detection method of any one of the above-mentioned methods is stored in the memory 12, and when the processor 14 executes the computer program, it may determine the distance between the reflector and the signal generator, further determine the type of the reflector, and display a prompt message corresponding to the distance message, so as to detect the initial working environment of the device, so as to determine whether the initial working environment meets the requirement of normal operation of the device, and also detect and give an early warning to a problem that may occur during the operation of the device, so as to maintain the device in time, reduce the failure rate of the device, and prolong the service life of the device.
The technical scheme of the invention, the foreign matter detection system and method and the heating and ventilation equipment are described in detail with the accompanying drawings.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A foreign matter detection system for a heating and ventilation device, comprising:
the signal processing device is arranged on a shell of the heating and ventilating equipment or a heat exchanger of the heating and ventilating equipment and comprises a signal generator used for sending an analog signal outwards and a signal receiver used for receiving the analog signal reflected by a reflector;
the microcontroller is electrically connected with the signal processing device and sends an electric signal to the signal generator at preset time intervals so as to control the signal generator to send the analog signal outwards;
the timer is electrically connected with the signal processing device and the microcontroller, determines a first moment when the analog signal is sent out and a second moment when the analog signal is received, and sends the first moment and the second moment to the microcontroller;
the display device is electrically connected with the microcontroller, the microcontroller determines distance information between the signal generator and the reflector in response to the time length between the first moment and the second moment, and the display device is used for displaying prompt information corresponding to the distance information;
the signal processing apparatus further includes:
the analog-to-digital converter is electrically connected with the signal generator, the signal receiver and the microcontroller and is used for converting the analog signal into a pulse signal and sending the pulse signal to the microcontroller;
the signal processing device further comprises a transducer signal processing chip, the transducer signal processing chip is electrically connected with the signal generator, the signal receiver and the timer, the transducer signal processing chip can generate an on/off pulse signal at the moment of sending/receiving the analog signal, the timer determines the first moment through the on pulse signal, and the timer determines the second moment through the off pulse signal.
2. The foreign object detection system according to claim 1, further comprising:
and each first switch piece is connected with the signal generator in series, responds to the electric signal of the microcontroller, and is communicated with a circuit where the signal generator is located to emit the analog signal outwards.
3. The foreign object detection system according to claim 1 or 2, characterized by further comprising:
at least one second switching element, each said second switching element being in series with said signal receiver, said second switching element being responsive to said electrical signal of said microcontroller to communicate to a circuit in which said signal receiver is located for receiving said reflected analog signal.
4. A foreign matter detection method is used for heating and ventilation equipment and is characterized by comprising the following steps:
sending a first analog signal outwards at a first preset interval and determining a first moment for sending the first analog signal;
receiving the first analog signal reflected by the first reflector and determining a second time instant at which the first analog signal is received;
determining a first time interval between the first time instant and the second time instant;
determining a first distance value of the first reflector from the heating and ventilating device according to the first time interval;
displaying prompt information corresponding to the first distance value or the first preset interval;
judging whether the first reflector belongs to a preset defrosting object or not, and generating a judgment result;
if the judgment result is yes, after the prompt message corresponding to the first distance value or the first preset interval is displayed, the defrosting operation is executed;
the displaying of the prompt information corresponding to the first distance value or the first preset interval specifically includes:
determining a first distance threshold corresponding to the first preset interval according to the first preset interval;
and when the first distance value is not greater than the first distance threshold, controlling the heating and ventilating equipment to display second prompt information corresponding to the first distance threshold.
5. The foreign object detection method according to claim 4, further comprising:
after the first distance value is determined to be not larger than the first distance threshold value, a second analog signal is sent outwards at a second preset interval, and a third moment when the second analog signal is sent out is determined;
receiving the second analog signal reflected by a second reflector and determining a fourth time instant at which the second analog signal is received;
determining a second time interval for sending the second analog signal and receiving the second analog signal according to the third time and the fourth time;
and determining a second distance value between the second reflector and the heating and ventilating device according to the second time interval, and stopping displaying the second prompt message until the second distance value is greater than the first distance threshold.
6. An apparatus for heating and ventilation, comprising: the foreign object detection system according to any one of claims 1 to 3.
7. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the foreign object detection method according to claim 4 or 5 when executing the computer program.
8. A computer-readable storage medium, on which a computer program is stored, the computer program, when being executed by a processor, implementing the foreign object detection method according to claim 4 or 5.
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| CN108240696A (en) * | 2018-03-15 | 2018-07-03 | 重庆物奇科技有限公司 | A kind of air-conditioner defrosting deicing system and method |
| CN110234209A (en) * | 2019-06-11 | 2019-09-13 | 百通电子科技有限公司 | A kind of wiring board, adjustment method and the control method of hard encapsulation |
| CN110691132B (en) * | 2019-09-27 | 2021-11-12 | 武汉云上楚地数据科技有限公司 | Method and system for configurable unified access of analog signal output to Internet of things |
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| CN101975435A (en) * | 2010-10-19 | 2011-02-16 | 三通(常州)电子科技有限公司 | Automatic defrosting control system of air conditioner |
| JP2012202670A (en) * | 2011-03-28 | 2012-10-22 | Mitsubishi Electric Corp | Air conditioner system |
| CN104422064B (en) * | 2013-08-22 | 2017-07-18 | 广东美的制冷设备有限公司 | The defrosting control method and device of air-conditioner |
| CN104728989B (en) * | 2013-12-18 | 2017-07-28 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and the air conditioner for performing the defrosting control method |
| CN204006405U (en) * | 2014-03-26 | 2014-12-10 | 广东美的集团芜湖制冷设备有限公司 | Air-conditioner outdoor unit and air-conditioning system |
| CN103925675B (en) * | 2014-03-27 | 2016-08-17 | 广东美的制冷设备有限公司 | Air-conditioning enters the determination methods of defrosting mode, judgment means and air-conditioning |
| CN104019531B (en) * | 2014-05-30 | 2016-06-22 | 广东美的制冷设备有限公司 | The Defrost method of air-conditioner and air-conditioner |
| CN104180478B (en) * | 2014-08-22 | 2017-08-25 | 广东美的集团芜湖制冷设备有限公司 | The defrosting control method of air conditioner, the defrosting control device of air conditioner and air conditioner |
| US20160249413A1 (en) * | 2015-02-23 | 2016-08-25 | Electronics And Telecommunications Research Institute | Transparent planar heater |
| CN104729016A (en) * | 2015-03-13 | 2015-06-24 | 广东美的暖通设备有限公司 | Dust removal method and device applied to air conditioner outdoor heat exchanger |
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