CN110966720A - State detection control method for electric heater, computer readable storage medium and air conditioner - Google Patents
State detection control method for electric heater, computer readable storage medium and air conditioner Download PDFInfo
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- CN110966720A CN110966720A CN201911077201.0A CN201911077201A CN110966720A CN 110966720 A CN110966720 A CN 110966720A CN 201911077201 A CN201911077201 A CN 201911077201A CN 110966720 A CN110966720 A CN 110966720A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
Abstract
The invention provides an electric heater state detection control method, a computer readable storage medium and an air conditioner, which are used for detecting a feedback current value when an electric heater works, sequentially carrying out self-detection on an electric heater control circuit and an electric heater body according to the feedback current value, and sending a signal to remind and stop the electric heater to work if any fault occurs in the self-detection process of the electric heater control circuit and the electric heater body. The invention accurately judges the real working state of the electric heater through the current value, finds out the abnormity in time to prevent the electrical safety problem caused by the fault of the electric heater body and the problem of the electric heater control circuit, further improves the intelligent control level of the air conditioner and reduces the influence caused by the fault of the electric heater.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a state detection control method of an electric heater, a computer readable storage medium and an air conditioner.
Background
The electric heater who uses on the air conditioner at present all has no state detection feedback mechanism, and the air conditioner mainboard uses two relays independent control electric heater's zero live wire, and main control unit control relay actuation back electric heater just gets into operating condition, because main control unit only controls the relay actuation, so can't learn the true operating condition of electric heater behind the relay actuation. Even if the electric heater fails, the air conditioner operation system can continuously control the electric heater to work, so that when the electric heater body fails abnormally, a user continuously uses the working mode of turning on the electric heater, and the electric safety problem and even serious fire can be caused.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a state detection control method of an electric heater, which accurately judges the state of the electric heater by detecting the working current value of the electric heater.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for detecting and controlling the state of an electric heater comprises the steps of detecting the feedback current value when the electric heater works, sequentially carrying out self-detection on an electric heater control circuit and an electric heater body according to the feedback current value, and sending a signal to remind and stop the electric heater to work if any one of the electric heater control circuit and the electric heater body fails in the self-detection process. The real working state of the electric heater is accurately judged through the current value, the electrical safety problem caused by the faults of the electric heater body and the electric heater control circuit is prevented by timely finding out the abnormity, the intelligent control level of the air conditioner is further improved, and the influence caused by the faults of the electric heater is reduced.
Further, the self-checking of the electric heater control circuit according to the feedback current value specifically comprises: the relays in the power supply circuits of the electric heater are controlled to be attracted one by one in sequence, and whether the relays have adhesion faults or not is indirectly judged by judging whether current values exist in the working circuit of the electric heater or not. The relay of the electric heater is controlled to be closed one by one in sequence, whether a current value exists or not is judged, the current value does not exist under the normal condition, if the current value exists, the fault of the relay is indicated, and the mode of directly, simply and effectively judging whether the fault condition exists or not of the electric heater through the current value is direct and simple.
Further, the self-checking of the electric heater control circuit according to the feedback current value specifically comprises: firstly, controlling the live wire to control the actuation of the relay, controlling the disconnection of the relay by using the null wire, detecting whether the live wire control circuit has current, judging that the relay has adhesion fault if the current value is generated, and otherwise, judging that the relay is normal. The actuation of the single-control live wire relay, the disconnection of the zero line relay, normally speaking, the disconnection of the return circuit, should not have the electric current in the circuit, if detect the current value and explain that the adhesion condition probably appears in the zero line relay, lead to the electric current appearing in the return circuit, can accurately judge whether the zero line relay breaks down, convenient subsequent maintenance.
Further, the self-checking of the electric heater control circuit according to the feedback current value specifically comprises: the live wire controls the relay to be disconnected, the zero line controls the relay to be attracted, whether current exists in the zero line control circuit or not is detected, if the current value exists, the relay is judged to have an adhesion fault, and otherwise, the relay is judged to be normal. The actuation of single control zero line relay, live wire relay disconnection, normally say the return circuit has broken off, should not have the electric current in the circuit, if detect the current value and explain the live wire relay adhesion condition probably appears, lead to appearing the electric current in the return circuit, can accurately judge whether the live wire relay breaks down, convenient subsequent maintenance.
Further, the self-checking of the electric heater body according to the feedback current value specifically comprises: after controlling the electric heater to stably operate for a certain time, detecting the real-time current value of the stable operation of the electric heater, analyzing and judging whether the current value is within a preset normal range, and if the detected real-time current value is not within the normal range, judging that the electric heater body has a fault; otherwise, the electric heater body is judged to be normal. Whether the electric heater fails or not is judged by comparing the preset normal current value with the detected real-time current value, so that the specific working state of the electric heater can be accurately obtained, the regulation and control are carried out in time, and the use safety of the electric heater is ensured.
Further, the specific step of judging that the electric heater body has the fault when the detected current value is not in the normal range is as follows: and if the detected real-time current value A meets the condition that A is not less than A1/X and not more than A2/X, judging that the electric heater body has an aging fault, wherein A1 is the preset lower limit value of the normal working current of the electric heater, A2 is the preset upper limit value of the normal working current of the electric heater, and X is an attenuation coefficient. The attenuation coefficient is set according to the conditions of the electric heaters with different powers, whether the current electric heater is aged or not can be accurately judged, and the follow-up maintenance of personnel can be facilitated according to the judgment result.
Further, the specific step of judging that the electric heater body has the fault when the detected current value is not in the normal range is as follows: and if the detected real-time current value A =0, judging that the protection device of the electric heater body has the fusing condition. When the fuse body of the protection device on the electric heater body acts, the electric heater loop is disconnected, the current value is 0A at the moment, the fact that the electric heater body has a fault is also indicated, and meanwhile the fault type of the electric heater can be judged.
The utility model provides an electric heater state detection device, includes memory, main control unit, live wire control circuit, zero line control circuit, state detection feedback circuit and electric heater, main control unit is used for receiving the current data of state detection feedback circuit transmission and sends relevant control command, live wire control circuit is used for controlling the actuation and the disconnection of live wire relay, zero line control circuit is used for controlling the actuation and the disconnection of zero line relay, state detection feedback circuit user feedback electric heater operating current, the memory is used for the relevant detection data of storage.
A computer readable storage medium storing a computer program which, when invoked by a processor, implements the electric heater state detection control method of any preceding claim.
An air conditioner comprising a processor and a memory for storing a computer program which, when invoked by the processor, implements the electric heater status detection control method of any preceding claim.
The invention provides a state detection control method of an electric heater, a computer readable storage medium and an air conditioner, which have the advantages that: the real working state of the electric heater can be detected in real time, the electrical safety problem caused by the fault of the electric heater body and the problem of the electric heater control circuit can be prevented by finding out the abnormity in time, and meanwhile, the power information of the electric heater during operation can be conveniently and accurately acquired; the intelligent control level of the air conditioner is further improved, and the influence caused by the fault of the electric heater is reduced.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention;
FIG. 2 is a schematic flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
Example 1: a method for detecting and controlling the state of an electric heater.
A state detection control method of an electric heater is applied to an air conditioner and comprises the following specific steps:
the historical fault state stored in the storage unit is judged before the self-checking process of the electric heater is started. This state defaults to factory non-failure mode. When a user has a problem with the electric heater function, fault information will be recorded. And when the self-checking process judges that the electric heater has historical fault records, the problem of the electric heater body or the control circuit is explained. The self-checking process is not operated, and the safety problem caused by the fact that the electric heater with faults is started in the self-checking process is prevented. When the user knows that the historical fault exists and informs the after-sales personnel to replace the new electric heater, the after-sales personnel use a special remote controller to send a special instruction to clear the fault position of the electric heater under the condition that the air conditioner is started to run. This method has guaranteed that electric heater maintenance needs to be confirmed through the after sales personnel and clears away the assurance security.
And when the self-checking process detects that the historical fault record of the electric heater does not exist, the self-checking process of the control circuit of the electric heater and the self-checking process of the body of the electric heater are operated, and the self-checking result record is stored in the memory after the two processes are finished.
The core of the self-checking process of the electric heater control circuit is that relays in each power supply circuit of the electric heater are sequentially controlled to attract the relays one by one, and whether the relays find adhesion faults or not is indirectly judged by judging whether current values exist in the working circuit of the electric heater or not. At present, two relays exist on an electric heater control circuit, one relay is used for controlling a live wire of an electric heater, and the other relay is used for controlling a zero wire.
When the self-checking and checking process of the electric heater control circuit is started, firstly, the live wire is controlled to attract, and meanwhile, the zero line control relay is switched off, at the moment, because the zero line control relay is not attracted on the electric heater circuit, no current exists on the electric heater state feedback circuit, and if a current value exists, the zero line control relay possibly has problems and is not controlled by the air conditioner main controller, and the fault attraction causes the power-on work of the electric heater. And on the contrary, the live wire control relay is disconnected, so that the zero line control relay is attracted, whether current passes through the electric heater circuit or not is judged in the same way, and if the current passes through the electric heater circuit, the live wire control relay possibly has problems and is not attracted by faults caused by the master control of the air conditioner. The control relay on the zero line and the live line independently controls the attraction touch to judge whether the relay which is not attracted has problems or not. If the current value exists in the electric heater circuit under one condition, the relay is considered to have a fault, and the electric heater control circuit is unqualified in self-inspection. And when the self-test failure occurs, the air conditioner writes the failure reason into the memory. And then quitting the self-checking process.
And if the self-checking and checking process of the electric heater control circuit normally passes, carrying out the next self-checking and checking process of the electric heater body.
After entering the self-checking flow of the electric heater body, firstly setting the operation mode of the air conditioner as an air supply mode (because the dry combustion condition can occur if an inner fan of the air conditioner is not started when the electric heater works, the electric heater is continuously electrified to generate heat but can trigger a temperature limiter and a fusing body in the electric heater body to act if no heat is radiated under the condition that the air supply mode needs to be started for testing the state of the electric heater body), and setting each wind sweeping angle as default (an upper wind guiding horizontal mode, a left wind sweeping horizontal mode and a right wind sweeping central mode). The electric heater function is then turned on. After the function of the electric heater is started, the current value of the stable work of the electric heater measured by the electric heater state feedback detection circuit is judged after the function of the electric heater is waited for 60-70 seconds, the electric heater is started, and then whether the work current is in a normal range is checked, so that whether the body of the electric heater works normally is judged, and if the detected current value is abnormal, the situations of aging, protection of a protection device and the like of the electric heater exist. (here, the current value is judged to have a multi-step judgment value, for example, if the power of the electric heater is 1800W and the power deviation value is plus 5% -10%, the current in normal operation is 7.36-8.6A, if the electric heater is a PTC type electric heater, the power is not constant, the normal current value needs to be multiplied by a lower limit power coefficient, the default is 0.8, the current value in normal operation is corrected to be 5.88-8.6A, if the used electric heater is used for too long time, the power of the electric heater is attenuated, if the power is attenuated, the current value is reduced, the default is that the power is attenuated to fifty percent and is regarded as the aging of the electric heater, the half attenuation of 1800W is 900W, the current value detected at this time is corrected according to the above calculation is 2.94-4.3A, after the protection device on the electric heater body is fused, the electric heater circuit is disconnected and the current value should be 0A. Explaining that the electric heater body has a fault) when the conditions of the aging of the electric heater, the open circuit of the protection device and the like are detected, the fault of the electric heater body is explained, and the self-inspection of the electric heater body is unqualified. And when the self-test failure occurs, the air conditioner writes the failure reason into the memory. And then the self-checking process is exited. And finishing the self-checking flow of the electric heater.
When a user uses the air conditioner, the air conditioner firstly acquires the fault information of the electric heater in the memory after receiving the operation mode set by the user, and if the electric heater control circuit is in fault, the electric heater is aged and the electric heater body is in fault, the function of the electric heater is closed by default. And operating according to a set operation mode in which the function of the electric heater is disabled. If the fault information of the electric heater does not exist, the electric heater is operated according to the operation state set by a user, and the working state of the electric heater is controlled by the air conditioner main control according to the control logic under each operation mode.
In the operation process of the air conditioner, the working state of the primary electric heater is checked at intervals, so that safety accidents caused by faults of the electric heater can be prevented in time.
Example 2: a method for detecting and controlling the state of an electric heater in the running process of an air conditioner.
A method for detecting and controlling the state of an electric heater in the running process of an air conditioner comprises the following specific steps:
firstly, the running state information set by the current user is obtained, and then whether the function of the electric heater is started in the running state set by the air conditioner is judged.
When the set running state electric heater function of the air conditioner does not need to be powered on to work or the electric heater function is forbidden due to faults, whether the feedback current value of the electric heater state detection is 0 or not is judged, if the feedback current value is 0, the air conditioner runs normally, and then the air conditioner is not detected once at intervals of 1 minute until a user controls the air conditioner to be turned off. If the detected electric heater current value is not 0, the electric heater is abnormal, the air conditioner is directly stopped, and the fault display is carried out. And finally, writing the detected abnormal data (including the operation mode of the air conditioner, various operation parameters during working and the like) into a memory. This anomaly data can be used for after-market maintenance.
When the function of the electric heater needs to be started to work in the running state set by the air conditioner and the function of the electric heater is not forbidden, judging whether the stable working current value of the electric heater is normal or not after waiting for the running state of the air conditioner to be stable (default for 3-5 minutes) and the power of the electric heater to be stable (default for 60-70 seconds). And if the detected stable working current value of the electric heater is within the normal range, the air conditioner operates according to a set mode and repeatedly detects at intervals of 1 minute. If the detected current value of the electric heater is not within the normal working current value, further judgment is carried out: whether the function of the electric heater is controlled to be closed by the normal operation of the main controller of the air conditioner or not (the normal closing condition is shown in the example, when the room temperature reaches a proper problem after the user sets the heating operation and the indoor stable temperature can be maintained by using the compressor in the air conditioner, the function of the electric heater is normally operated and closed), if the function of the electric heater is normally operated and closed, the electric heater operates according to a set mode and is repeatedly detected at intervals of 1 minute. If the normal operation is not closed, the electric heater is judged to be abnormal, and the air conditioner is directly stopped and fault display is carried out. And finally, writing the detected abnormal data (including the operation mode of the air conditioner, various operation parameters during working and the like) into a memory. This anomaly data can be used for after-market maintenance.
The details of the abnormal display flow of the electric heater are as follows:
when the abnormal condition information of the electric heater is judged to be stored in the memory, an HH fault code (the fault code can be defined) is displayed on a double-8 display for displaying the temperature value of the air conditioner, if an independent auxiliary heating word prompt exists on a display panel of the air conditioner, the auxiliary heating word is flickered to prompt a user that the electric heater has a fault when the fault occurs. And then judging whether the air conditioner is accessed to the Internet of things control, and if the air conditioner is accessed to the Internet of things control, pushing fault information to inform a user through a network.
Example 3: a state detection device for an electric heater.
The utility model provides an electric heater state detection device, includes memory, main control unit, live wire control circuit, zero line control circuit, state detection feedback circuit and electric heater, main control unit is used for receiving the current data of state detection feedback circuit transmission and sends relevant control command, live wire control circuit is used for controlling the actuation and the disconnection of live wire relay, zero line control circuit is used for controlling the actuation and the disconnection of zero line relay, state detection feedback circuit user feedback electric heater operating current, the memory is used for the relevant detection data of storage.
In this embodiment, a state detection feedback circuit and a memory are added as compared with a conventional circuit block diagram. The state detection feedback circuit enables the current of the electric heater during working to pass through a series of circuits such as a mutual inductor and the like in the state detection device and a controller program, so that the main controller of the air conditioner can identify the actual running state of the electric heater. The memory is used for storing the self-checking flow result of the electric heater and the detection result information of the operation process, and then judging whether the function of the electric heater can be safely started or not when the air conditioner is in the initial operation setting mode.
All there is not electric heater self-checking function on the mainstream air conditioner at present, can inspect the electric heater state fast through combining the feedback current value of state detection feedback circuit in the electric heater during operation, increased electric heater self-checking function on the air conditioner, promoted the intellectuality of air conditioner.
Example 4: a computer readable storage medium.
A computer-readable storage medium for storing a computer program that implements the electric heater state detection control method described in embodiment 1 when the computer program is called by a processor.
Example 5: an air conditioner.
An air conditioner comprising a processor and a memory, wherein the memory is used for storing a computer program, and the state detection control method of the electric heater in the air conditioner operation process in the embodiment 2 is realized when the computer program is called by the processor.
The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, and therefore, all equivalent or modifications that do not depart from the spirit of the present invention are intended to fall within the scope of the present invention.
Claims (10)
1. A state detection control method for an electric heater is characterized in that a feedback current value when the electric heater works is detected, self-checking of an electric heater control circuit and self-checking of an electric heater body are sequentially carried out according to the feedback current value, and if a fault occurs in any self-checking process of the electric heater control circuit and the electric heater body, a signal is sent to remind and stop the electric heater to work.
2. The method for detecting and controlling the state of an electric heater according to claim 1, wherein the self-detection of the electric heater control circuit according to the feedback current value is specifically as follows: the relays in the power supply circuits of the electric heater are controlled to be attracted one by one in sequence, and whether the relays have adhesion faults or not is indirectly judged by judging whether current exists in the working circuit of the electric heater.
3. The method for detecting and controlling the state of an electric heater according to claim 1, wherein the self-detection of the electric heater control circuit according to the feedback current value is specifically as follows: firstly, controlling the live wire to control the actuation of the relay, controlling the disconnection of the relay by using the null wire, detecting whether the live wire control circuit has current, judging that the relay has adhesion fault if the current value is generated, and otherwise, judging that the relay is normal.
4. The method for detecting and controlling the state of an electric heater according to claim 1, wherein the self-detection of the electric heater control circuit according to the feedback current value is specifically as follows: the method comprises the steps of firstly controlling a live wire relay to be disconnected, attracting a zero line relay, detecting whether current exists in a zero line control circuit, judging whether the relay has an adhesion fault if the current exists, and otherwise, judging whether the relay is normal.
5. The method for detecting and controlling the state of an electric heater according to claim 1, wherein the self-detecting the electric heater body according to the feedback current value comprises: after controlling the electric heater to stably operate for a certain time, detecting the real-time current value of the stable operation of the electric heater, analyzing and judging whether the current value is within a preset normal range, and if the detected real-time current value is not within the normal range, judging that the electric heater body has a fault; otherwise, the electric heater body is judged to be normal.
6. The method for detecting and controlling the state of an electric heater according to claim 5, wherein the step of determining that the electric heater body has a fault when the detected current value is not within the normal range is specifically as follows: and if the detected real-time current value A meets the condition that A is not less than A1/X and not more than A2/X, judging that the electric heater body has an aging fault, wherein A1 is the preset lower limit value of the normal working current of the electric heater, A2 is the preset upper limit value of the normal working current of the electric heater, and X is an attenuation coefficient.
7. The method for detecting and controlling the state of an electric heater according to claim 5, wherein the step of determining that the electric heater body has a fault when the detected current value is not within the normal range is specifically as follows: and if the detected real-time current value A =0, judging that the protection device of the electric heater body has the fusing condition.
8. The utility model provides an electric heater state detection device, its characterized in that, includes memory, main control unit, live wire control circuit, zero line control circuit, state detection feedback circuit and electric heater, main control unit is used for receiving the current data of state detection feedback circuit transmission and sends relevant control command, live wire control circuit is used for controlling the actuation and the disconnection of live wire relay, zero line control circuit is used for controlling the actuation and the disconnection of zero line relay, state detection feedback circuit is used for feeding back electric heater operating current, the memory is used for the relevant data that detect of storage.
9. A computer-readable storage medium storing a computer program, wherein the computer program, when invoked by a processor, implements the electric heater state detection control method of any one of claims 1 to 7.
10. An air conditioner comprising a processor and a memory for storing a computer program, wherein the computer program when invoked by the processor implements the electric heater status detection control method of any one of claims 1 to 7.
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| CN114234362A (en) * | 2021-12-27 | 2022-03-25 | 珠海格力电器股份有限公司 | Control method and device for judging aging of components and air conditioner |
| CN114326546A (en) * | 2020-09-29 | 2022-04-12 | 云米互联科技(广东)有限公司 | Kitchen appliance control method, kitchen appliance and computer-readable storage medium |
| CN114312217A (en) * | 2021-12-30 | 2022-04-12 | 上海洛轲智能科技有限公司 | Vehicle heater fault detection method and device and vehicle |
| CN115568052A (en) * | 2022-11-03 | 2023-01-03 | 江苏新恒基特种装备股份有限公司 | Intermediate frequency rapid heating control method and system based on infrared temperature measurement |
| CN115930360A (en) * | 2022-12-07 | 2023-04-07 | 珠海格力电器股份有限公司 | Electric heater fault detection method and device and air conditioning equipment |
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