CN115127193A - Detection method and system for loose wiring of zero line and live line and air conditioner outdoor unit - Google Patents
Detection method and system for loose wiring of zero line and live line and air conditioner outdoor unit Download PDFInfo
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- CN115127193A CN115127193A CN202210797353.3A CN202210797353A CN115127193A CN 115127193 A CN115127193 A CN 115127193A CN 202210797353 A CN202210797353 A CN 202210797353A CN 115127193 A CN115127193 A CN 115127193A
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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
- F24F11/38—Failure diagnosis
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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
- F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F11/88—Electrical aspects, e.g. circuits
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Abstract
The embodiment of the invention provides a method and a system for detecting loosening of zero and live wire connection and an outdoor unit of an air conditioner, wherein the method for detecting loosening of the zero and live wire connection comprises the following steps: operating an air conditioner; acquiring zero and live wire input current; under the condition that the peak value of the zero-live line input current meets a first preset condition, acquiring the temperature of a wiring terminal; and judging whether the zero-live wire is loosened according to the temperature of the wiring terminal. The invention solves the technical problem of loose zero-live wire connection at the outdoor unit wiring terminal.
Description
Technical Field
The invention relates to the technical field of air conditioner fault detection, in particular to a method and a system for detecting loose of zero and live wire connection and an air conditioner outdoor unit.
Background
The working environment that the outdoor unit of the air conditioner is located is relatively bad, the installation environment is poor, zero live wire wiring looseness can possibly occur when the unit is installed or under the long-term working condition, the lead-in terminal of the air conditioner is poor in contact, high-voltage large-current electric arcs are generated when the air conditioner is electrified and operated, frequent overcurrent protection of the controller is slightly caused to influence the use of a user, the controller is seriously burnt, wiring terminals are on fire, and property loss of the user is caused.
Disclosure of Invention
In order to solve the problem of loose zero-live wire connection at the outdoor unit wiring terminal, the invention provides a method for detecting loose zero-live wire connection, which comprises the following steps: operating an air conditioner; acquiring zero and live wire input current; under the condition that the peak value of the zero-live line input current meets a first preset condition, acquiring the temperature of a wiring terminal; and judging whether the zero-live wire is loosened according to the temperature of the wiring terminal.
The technical effect achieved after the technical scheme is adopted is as follows: by collecting the temperature of the wiring terminal and the running state of the zero-live line input current, the reason for generating the abnormal current can be accurately identified, the problem reason can be conveniently checked by a user and after sales, and the running reliability of the air conditioner is improved. Specifically, whether abnormal current is generated or not can be judged according to the peak value of the zero-live line input current, and whether the zero-live line input current is abnormal or not caused by loosening of the zero-live line at the wiring terminal can be judged according to the temperature of the wiring terminal.
In this embodiment, the first preset condition includes: and the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is larger than the frequency threshold value.
The technical effect achieved after the technical scheme is adopted is as follows: if the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is larger than the frequency threshold value, the current zero live wire input current is proved to have abnormal fluctuation.
In this embodiment, the peak threshold includes a first frequency threshold and a second frequency threshold; the first preset condition includes: the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is larger than or equal to the first frequency threshold value, and the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is smaller than the second frequency threshold value; wherein the first frequency threshold is less than the second frequency threshold.
The technical effect achieved after the technical scheme is adopted is as follows: when a short circuit occurs inside the controller, the peak value of the zero live input current may occur a plurality of times in a short time at a frequency greater than the peak threshold value. If the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is larger than or equal to the first frequency threshold value, it is indicated that the frequency that the current zero live wire input current fluctuates already exceeds the frequency that the power grid normally fluctuates, so it is determined that the current zero live wire input current is abnormal, and therefore troubleshooting needs to be performed, and the size relation between the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value and the second frequency threshold value is detected. If the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is smaller than the second frequency threshold value, the fact that the abnormal fluctuation of the current zero live wire input current is not caused by the internal short circuit of the controller is shown, and therefore the temperature of the terminal is detected.
In this embodiment, if the frequency at which the peak value of the zero live line input current is greater than the peak threshold value is less than the first frequency threshold value, it is determined that the grid fluctuates.
The technical effect achieved after the technical scheme is adopted is as follows: it should be noted that, when the power grid fluctuates, the peak value of the zero-live input current is larger than the peak threshold value, but the frequency does not exceed the first frequency threshold value. Therefore, if the frequency that the peak value of the zero line input current is larger than the peak value threshold value is smaller than the first frequency threshold value, it is indicated that the situation that the peak value of the current zero line input current is larger than the peak value threshold value is the power grid fluctuation, and the action is not needed.
In this embodiment, if the frequency at which the peak value of the zero-live line input current is greater than the peak threshold value is greater than or equal to the first frequency threshold value, it is determined whether the frequency at which the peak value of the zero-live line input current is greater than the peak threshold value is greater than or equal to the second frequency threshold value, and if so, it is determined that a short circuit occurs inside the controller, and overcurrent protection is output.
The technical effect achieved after the technical scheme is adopted is as follows: if the frequency that the peak value of the zero-live line input current is larger than the peak value threshold value is larger than or equal to the first frequency threshold value, it is indicated that the frequency of the fluctuation of the current zero-live line input current exceeds the frequency of the normal fluctuation of the power grid, so that the current zero-live line input current is judged to be abnormal, and fault troubleshooting is needed. According to the magnitude relation between the frequency with the peak value of the zero live wire input current larger than the peak value threshold value and the second frequency threshold value, whether the abnormal fluctuation of the current zero live wire input current is caused by the internal short circuit of the controller can be judged. If the frequency that the peak value of the zero-live line input current is larger than the peak value threshold value is larger than or equal to the second frequency threshold value, the frequency that the current zero-live line input current has a large current peak is very high, so that the reason that the abnormal fluctuation of the current zero-live line input current is judged to be the internal short circuit of the controller, and overcurrent protection is output to remind a user to contact with the after-sales fault problem to be solved.
In this embodiment, whether zero-live wire connection looseness occurs is judged according to the relationship between the temperature of the connection terminal and the temperature threshold of the terminal; and if the temperature of the wiring terminal is greater than or equal to the temperature threshold of the terminal, determining that the wiring is loose, and controlling the air conditioner to stop.
The technical effect achieved after the technical scheme is adopted is as follows: it should be noted that when zero-live wire connection looseness exists at a connection terminal of an outdoor unit of an air conditioner, poor contact at the connection terminal of the air conditioner can be caused, high-voltage large-current electric arcs can be generated when the air conditioner is powered on, and the temperature at the connection terminal is abnormally increased. If the temperature of the wiring terminal is larger than or equal to the terminal temperature threshold value, the fact that electric arcs appear at the wiring terminal is judged, and therefore the wiring is determined to be loose, and the air conditioner is controlled to stop.
In this embodiment, if the terminal temperature is less than the terminal temperature threshold, it is determined that the grid fluctuates.
The technical effect achieved after the technical scheme is adopted is as follows: if the temperature of the wiring terminal is smaller than the terminal temperature threshold value, the temperature of the wiring terminal is normal, and therefore the power grid is judged to fluctuate and the operation can be continued.
The embodiment of the invention provides a system for detecting loosening of zero-live wire connection, which executes the method for detecting loosening of zero-live wire connection in any one of the previous embodiments.
An embodiment of the present invention provides an outdoor unit for an air conditioner, including: the control module is used for controlling the operation of the air conditioner; the first acquisition module is used for acquiring zero live line input current; the second acquisition module is used for acquiring the temperature of the wiring terminal under the condition that the peak value of the zero live wire input current meets a first preset condition; and the judging module is used for judging whether the zero-live wire is loosened according to the temperature of the wiring terminal.
An embodiment of the present invention provides an outdoor unit for an air conditioner, including: a computer readable storage medium storing a computer program and a packaged IC, wherein when the computer program is read by the packaged IC and executed, the outdoor unit of the air conditioner performs the method for detecting loose wire connections between zero and live wires as described in any one of the previous embodiments.
In summary, the above embodiments of the present application may have one or more of the following advantages or beneficial effects:
(1) through collecting the temperature of the wiring terminal and the running state of the zero-live line input current, the reason of abnormal current can be accurately identified, the problem reason can be conveniently checked by a user and after sales, and the running reliability of the air conditioner is improved. Specifically, whether abnormal current is generated or not can be judged according to the peak value of the zero-live line input current, and whether the zero-live line input current is abnormal or not caused by loosening of the zero-live line at the wiring terminal can be judged according to the temperature of the wiring terminal.
(2) When a short circuit occurs inside the controller, the peak value of the zero live input current can occur a plurality of times in a short time, and the frequency is larger than the peak value threshold value. If the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is larger than or equal to the first frequency threshold value, it is indicated that the frequency that the current zero live wire input current fluctuates already exceeds the frequency that the power grid normally fluctuates, so it is determined that the current zero live wire input current is abnormal, and therefore troubleshooting needs to be performed, and the size relation between the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value and the second frequency threshold value is detected. If the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is smaller than the second frequency threshold value, the fact that the abnormal fluctuation of the current zero live wire input current is not caused by the internal short circuit of the controller is shown, and therefore the temperature of the terminal is detected.
(3) It should be noted that when zero-live wire connection looseness exists at a connection terminal of an outdoor unit of an air conditioner, poor contact at the connection terminal of the air conditioner can be caused, high-voltage large-current electric arcs can be generated when the air conditioner is powered on, and the temperature at the connection terminal is abnormally increased. If the temperature of the wiring terminal is larger than or equal to the terminal temperature threshold value, the fact that electric arcs appear at the wiring terminal is judged, and therefore the wiring is determined to be loose, and the air conditioner is controlled to stop.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a detection method for loose wire connection of a zero-live wire.
Fig. 2 is a schematic flow chart of a method for detecting loose wiring of a zero-live wire.
FIG. 3 is a block schematic diagram of a detection system for loose wire zero and live connections.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, 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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
[ first embodiment ] A method for manufacturing a semiconductor device
Referring to fig. 1, it is a schematic flow chart of a method for detecting loose wiring of a live wire and a zero-live wire according to a first embodiment of the present invention. With reference to fig. 1 and 2, the method for detecting loose zero-live wire connection includes the following steps: operating an air conditioner; acquiring zero and live wire input current; under the condition that the peak value of the zero-live line input current meets a first preset condition, acquiring the temperature of a wiring terminal; and judging whether the zero-live wire is loose according to the temperature of the wiring terminal.
It can be understood that the reason of abnormal current generation can be accurately identified by collecting the temperature of the wiring terminal and the running state of the zero-live line input current, so that the problem reason can be conveniently checked by a user and after-sales, and the running reliability of the air conditioner is improved. Specifically, whether abnormal current is generated or not can be judged according to the peak value of the zero-live line input current, and whether the zero-live line input current abnormality is caused by loosening of the zero-live line at the wiring terminal or not can be judged according to the temperature of the wiring terminal.
Further, the first preset condition includes: and the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is larger than the frequency threshold value.
It can be understood that if the frequency that the peak value of the zero live wire input current is greater than the peak value threshold value is greater than the frequency threshold value, it indicates that the current zero live wire input current has abnormal fluctuation.
Further, the peak threshold includes a first frequency threshold and a second frequency threshold; the first preset condition comprises the following steps: the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is larger than or equal to the first frequency threshold value, and the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is smaller than the second frequency threshold value; wherein the first frequency threshold is less than the second frequency threshold.
When a short circuit occurs inside the controller, the peak value of the zero live input current may occur a plurality of times in a short time at a frequency greater than the peak threshold value.
In one embodiment, if the frequency that the peak value of the zero live wire input current is greater than the peak threshold value is greater than or equal to the first frequency threshold value, it is indicated that the frequency that the current zero live wire input current fluctuates already exceeds the frequency that the power grid normally fluctuates, so it is determined that the current zero live wire input current is abnormal, and therefore troubleshooting is required to be performed, and the magnitude relation between the frequency that the peak value of the zero live wire input current is greater than the peak threshold value and the second frequency threshold value is detected. If the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is smaller than the second frequency threshold value, the fact that the abnormal fluctuation of the current zero live wire input current is caused by the internal short circuit of the controller does not mean that the current zero live wire input current is detected, and therefore the temperature of the terminal is detected.
For example, the first frequency threshold is a phenomenon that the peak value of the zero-live input current is greater than the peak value threshold for 5 times within one minute; the second frequency threshold is the phenomenon that the peak value of the zero-fire line input current is larger than the peak value threshold value within 3 ms.
Further, if the frequency that the peak value of the zero live line input current is larger than the peak value threshold value is smaller than a first frequency threshold value, the grid fluctuation is determined.
It should be noted that, when the power grid fluctuates, the peak value of the zero-live input current is larger than the peak threshold value, but the frequency does not exceed the first frequency threshold value. Therefore, if the frequency that the peak value of the zero line input current is larger than the peak value threshold value is smaller than the first frequency threshold value, it is indicated that the situation that the peak value of the current zero line input current is larger than the peak value threshold value is the power grid fluctuation, and the action is not needed.
Further, if the frequency that the peak value of the zero live wire input current is greater than the peak value threshold value is greater than or equal to the first frequency threshold value, whether the frequency that the peak value of the zero live wire input current is greater than the peak value threshold value is greater than or equal to the second frequency threshold value is judged, if yes, it is judged that a short circuit occurs inside the controller, and overcurrent protection is output.
It can be understood that if the frequency that the peak value of the zero live wire input current is greater than the peak value threshold value is greater than or equal to the first frequency threshold value, it indicates that the frequency of the current zero live wire input current fluctuation already exceeds the frequency of the normal fluctuation of the power grid, so it is determined that the current zero live wire input current is abnormal, and troubleshooting is required. According to the magnitude relation between the frequency with the peak value of the zero live wire input current larger than the peak value threshold value and the second frequency threshold value, whether the abnormal fluctuation of the current zero live wire input current is caused by the internal short circuit of the controller can be judged. If the frequency that the peak value of the zero-live line input current is larger than the peak value threshold value is larger than or equal to the second frequency threshold value, the frequency that the current zero-live line input current has large current peaks is very high, and therefore the reason that the abnormal fluctuation of the current zero-live line input current is caused by the internal short circuit of the controller is judged, overcurrent protection is output, and a user is reminded to contact and solve the fault problem after sale.
Further, whether zero-live wire connection looseness occurs or not is judged according to the size relation between the temperature of the wiring terminal and the temperature threshold of the terminal; and if the temperature of the wiring terminal is greater than or equal to the temperature threshold of the terminal, determining that the wiring is loose, and controlling the air conditioner to stop.
It should be noted that when zero-live wire connection looseness exists at a connection terminal of an outdoor unit of an air conditioner, poor contact at the connection terminal of the air conditioner can be caused, high-voltage large-current electric arcs can be generated when the air conditioner is powered on, and the temperature at the connection terminal is abnormally increased. If the temperature of the wiring terminal is larger than or equal to the terminal temperature threshold value, the fact that electric arcs appear at the wiring terminal is judged, and therefore the wiring is determined to be loose, and the air conditioner is controlled to stop.
Further, if the temperature of the wiring terminal is smaller than a terminal temperature threshold value, the power grid fluctuation is judged.
It can be understood that if the temperature of the connection terminal is less than the terminal temperature threshold value, it indicates that the temperature at the connection terminal is normal, so that it is determined that the power grid fluctuates, and the operation can be continued.
[ second embodiment ]
The invention provides a system for detecting the loosening of zero-live wire connection. The detection system for the zero live wire loose connection is provided with a temperature sensor for detecting the temperature of a wiring terminal at the wiring terminal of the outdoor unit. The system for detecting loose zero-live wire connection performs the method for detecting loose zero-live wire connection according to the first embodiment, and can achieve the same effect, and is not described herein again to avoid repetition.
[ third embodiment ]
A third embodiment of the present invention provides an outdoor unit for an air conditioner. Referring to fig. 3, the outdoor unit 200 for an air conditioner includes, for example: a control module 210, a first obtaining module 220, a second obtaining module 230, and a determining module 240. The control module 210 is used for controlling the operation of the air conditioner; the first obtaining module 220 is used for obtaining zero live line input current; the second obtaining module 230 is configured to obtain the terminal temperature when the peak value of the zero live line input current meets a first preset condition; the judging module 240 is used for judging whether the zero-live wire connection is loose according to the temperature of the wiring terminal.
In a specific embodiment, the control module 210, the first obtaining module 220, the second obtaining module 230, and the determining module 240 cooperate with each other to implement the method for detecting loose connection between a live wire and a live wire according to the first embodiment of the present invention, and the same technical effect can be achieved.
[ fourth example ] A
A fourth embodiment of the present invention provides an outdoor unit for an air conditioner, including: the present invention relates to a method for detecting loose wire connection between an outdoor unit and a fire wire, and more particularly, to a method for detecting loose wire connection between a fire wire and a fire wire, which is capable of achieving the same technical effects as described above.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for detecting loose wiring of a zero-live wire is characterized by comprising the following steps:
operating an air conditioner;
acquiring zero and live wire input current;
under the condition that the peak value of the zero-live line input current meets a first preset condition, acquiring the temperature of a wiring terminal;
and judging whether the zero-live wire is loosened or not according to the temperature of the wiring terminal.
2. The method for detecting loose wire connection of zero line or live line according to claim 1,
the first preset condition includes: and the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is larger than the frequency threshold value.
3. The method of detecting loose zero-wire wiring according to claim 2, wherein the peak threshold comprises a first frequency threshold and a second frequency threshold; the first preset condition includes:
the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is larger than or equal to the first frequency threshold value, and the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is smaller than the second frequency threshold value;
wherein the first frequency threshold is less than the second frequency threshold.
4. The method for detecting loose wire connections of zero line of claim 3,
and if the frequency that the peak value of the zero live line input current is larger than the peak value threshold value is smaller than a first frequency threshold value, determining that the power grid fluctuates.
5. The method for detecting loose wire connections of zero line of claim 3,
if the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is larger than or equal to the first frequency threshold value, judging whether the frequency that the peak value of the zero live wire input current is larger than the peak value threshold value is larger than or equal to the second frequency threshold value, if so, judging that a short circuit occurs inside the controller, and outputting overcurrent protection.
6. The method for detecting loose zero-live wire connection according to claim 1, wherein judging whether loose zero-live wire connection occurs according to the temperature of the wiring terminal comprises:
judging whether zero-live line connection loosening occurs or not according to the size relation between the temperature of the wiring terminal and the temperature threshold of the terminal; and if the temperature of the wiring terminal is greater than or equal to the terminal temperature threshold, judging that the wiring is loose, and controlling the air conditioner to stop.
7. The method for detecting loose zero-live wire connection according to claim 1, wherein judging whether loose zero-live wire connection occurs according to the temperature of the connection terminal further comprises:
and if the temperature of the wiring terminal is smaller than the terminal temperature threshold value, determining that the power grid fluctuates.
8. A loose wire and live wire detection system, characterized in that the loose wire and live wire detection system executes the loose wire and live wire detection method according to any one of claims 1 to 7.
9. An outdoor unit for an air conditioner, comprising:
the control module is used for controlling the operation of the air conditioner;
the first acquisition module is used for acquiring zero live line input current;
the second obtaining module is used for obtaining the temperature of the wiring terminal under the condition that the peak value of the zero-live wire input current meets a first preset condition;
and the judging module is used for judging whether the zero-live wire connection is loosened or not according to the temperature of the wiring terminal.
10. An outdoor unit for an air conditioner, comprising: a computer readable storage medium storing a computer program and a packaged IC, wherein when the computer program is read by the packaged IC and executed, the outdoor unit of the air conditioner performs the method for detecting loose connections between zero and live wires according to any one of claims 1 to 7.
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| CN202210797353.3A CN115127193B (en) | 2022-07-06 | 2022-07-06 | Zero and live wire wiring looseness detection method and system and air conditioner outdoor unit |
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| CN202210797353.3A CN115127193B (en) | 2022-07-06 | 2022-07-06 | Zero and live wire wiring looseness detection method and system and air conditioner outdoor unit |
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