CN113465119B - Fire detection control method for air conditioner - Google Patents

Fire detection control method for air conditioner Download PDF

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Publication number
CN113465119B
CN113465119B CN202110732609.8A CN202110732609A CN113465119B CN 113465119 B CN113465119 B CN 113465119B CN 202110732609 A CN202110732609 A CN 202110732609A CN 113465119 B CN113465119 B CN 113465119B
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China
Prior art keywords
set value
compressor
temperature
air conditioner
indoor unit
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CN202110732609.8A
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Chinese (zh)
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CN113465119A (en
Inventor
王建营
安超
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Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd, Qingdao Haier Air Conditioning Electric Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Priority to CN202110732609.8A priority Critical patent/CN113465119B/en
Publication of CN113465119A publication Critical patent/CN113465119A/en
Priority to PCT/CN2022/101906 priority patent/WO2023274228A1/en
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Publication of CN113465119B publication Critical patent/CN113465119B/en
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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
    • 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
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • 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
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention relates to the technical field of air conditioners, in particular to a fire detection control method of an air conditioner, aiming at solving the problems that the prior air conditioner cannot take countermeasures in time once a fire occurs, and a user possibly finds out that serious consequences are easy to occur in time, so that the safety requirement of the user cannot be met. For this purpose, the fire detection control method of the present invention comprises: in the running process of the air conditioner, the exhaust temperature of the compressor, the coil temperature of the indoor unit, the coil temperature of the outdoor unit, the running frequency of the compressor and the outdoor environment temperature are obtained in real time; judging whether the air conditioner fires according to the exhaust temperature of the compressor, the coil temperature of the indoor unit, the coil temperature of the outdoor unit, the operating frequency of the compressor and the outdoor environment temperature; and under the condition that the air conditioner is judged to be on fire, stopping the compressor after the set time and sending out a fire prompt. The invention can inform the user in time when the air conditioner fires, improves the safety of the air conditioner and meets the safety requirement of the user.

Description

Fire detection control method for air conditioner
Technical Field
The invention relates to the technical field of air conditioners, and particularly provides a fire detection control method of an air conditioner.
Background
An air conditioner is a device capable of adjusting an indoor environment temperature, which can lower the indoor environment temperature by cooling and raise the indoor environment temperature by heating, thereby improving user comfort.
As electric equipment, the air conditioner is likely to be on fire in the using process, once the air conditioner is on fire, the indoor unit and the outdoor unit are connected through the connecting pipe, the fire can quickly spread the whole indoor and outdoor, immeasurable loss is caused, personal safety is seriously threatened, if the fire starts to occur on one side of the outdoor unit, a user is more difficult to perceive, and the user waits until the user finds that the air conditioner is on fire, the user can not take countermeasures in time, and the threat to families of other users is easily caused.
In the prior art, researches are generally conducted in the aspect of fire prevention of an air conditioner, namely, the fire is prevented by monitoring the operation states of a compressor and an outdoor fan, for example, the operation frequency of the compressor is adjusted at any time, or the rotation speed of the outdoor fan is adjusted, but the mode is only used for preventing the fire, and the reasons of the fire of the air conditioner are quite various, and the prevention alone is obviously insufficient and cannot meet the safety requirements of users.
Accordingly, there is a need in the art for a new fire detection control method of an air conditioner to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to solve the technical problems that the prior air conditioner cannot take countermeasures in time once the fire is on, and the user possibly finds out that serious consequences are easy to occur due to untimely discovery, so that the safety requirement of the user cannot be met.
The invention provides a fire detection control method of an air conditioner, which comprises the following steps:
in the running process of the air conditioner, the exhaust temperature of the compressor, the coil temperature of the indoor unit, the coil temperature of the outdoor unit, the running frequency of the compressor and the outdoor environment temperature are obtained in real time;
determining whether the air conditioner fires according to the discharge temperature of the compressor, the coil temperature of the indoor unit, the coil temperature of the outdoor unit, the operating frequency of the compressor and the outdoor environment temperature;
and under the condition that the air conditioner is judged to be on fire, stopping the compressor after the set time and sending out a fire prompt.
In the above preferred technical solution of the fire detection control method, the step of determining whether the air conditioner fires according to the discharge temperature of the compressor, the coil temperature of the indoor unit, the coil temperature of the outdoor unit, the operating frequency of the compressor, and the outdoor environment temperature specifically includes:
judging whether the difference between the discharge temperature before the first preset time of the compressor and the discharge temperature at the current time of the compressor is larger than or equal to a first set value, judging whether the difference between the coil temperature before the first preset time of the indoor unit and the coil temperature at the current time of the indoor unit is larger than or equal to a second set value, judging whether the difference between the operating frequency before the first preset time of the compressor and the operating frequency at the current time of the compressor is smaller than or equal to a third set value, judging whether the absolute value of the difference between the outdoor environment temperature before the first preset time and the outdoor environment temperature at the current time is smaller than a fourth set value, judging whether the difference between the discharge temperature at the current time of the compressor and the coil temperature at the current time of the indoor unit is larger than a fifth set value and continuously for a second preset time, and judging whether the coil temperature at the current time of the indoor unit is larger than or equal to a sixth set value or whether the coil temperature at the current time of the outdoor unit is larger than or equal to a seventh set value;
and judging whether the air conditioner fires according to the judging result.
In the above preferred technical solution of the fire detection control method, the step of determining whether the air conditioner fires according to the determination result specifically includes:
if it is determined that the difference between the discharge temperature before the first preset time of the compressor and the discharge temperature at the present time of the compressor is greater than or equal to the first set value, and it is determined that the difference between the discharge temperature before the first preset time of the indoor unit and the coil temperature at the present time of the indoor unit is greater than or equal to the second set value, and it is determined that the difference between the operating frequency before the first preset time of the compressor and the operating frequency at the present time of the compressor is less than or equal to the third set value, and it is determined that the absolute value of the difference between the outdoor ambient temperature before the first preset time and the outdoor ambient temperature at the present time is less than the fourth set value, and it is determined that the difference between the discharge temperature at the present time of the compressor and the coil temperature at the present time of the indoor unit is greater than the fifth set value and continues for the second preset time, and it is determined that the coil temperature at the present time of the indoor unit is greater than or equal to the sixth set value, or the coil temperature at the present time of the outdoor unit is greater than or equal to the seventh set value, the air conditioner is determined.
In the above preferred embodiment of the fire detection control method, if it is determined that the difference between the discharge temperature before the first preset time of the compressor and the discharge temperature at the current time of the compressor is greater than or equal to the first set value, and it is determined that the difference between the coil temperature before the first preset time of the indoor unit and the coil temperature at the current time of the indoor unit is greater than or equal to the second set value, and it is determined that the difference between the operating frequency before the first preset time of the compressor and the operating frequency at the current time of the compressor is less than or equal to the third set value, and it is determined that the absolute value of the difference between the outdoor ambient temperature before the first preset time and the outdoor ambient temperature at the current time is less than the fourth set value, and it is determined that the difference between the discharge temperature at the current time of the compressor and the coil temperature at the current time of the indoor unit is greater than the fifth set value, and the second preset time, and it is determined that the temperature at the current time of the indoor unit is greater than or equal to the sixth set value, and it is determined that the temperature at the current time of the indoor unit is greater than or equal to the seventh set value, the air conditioner comprises the steps of determining that the temperature of the outdoor unit is greater than or equal to the fourth set value:
if, within a third preset time, it is determined that a difference between the discharge temperature before the first preset time of the compressor and the discharge temperature at the current time of the compressor is greater than or equal to the first set value, and it is determined that a difference between the coil temperature before the first preset time of the indoor unit and the coil temperature at the current time of the indoor unit is greater than or equal to the second set value, and it is determined that a difference between the operating frequency before the first preset time of the compressor and the operating frequency at the current time of the compressor is less than or equal to the third set value, and it is determined that an absolute value of a difference between the outdoor ambient temperature before the first preset time and the outdoor ambient temperature at the current time is less than the fourth set value, and it is determined that a difference between the discharge temperature at the current time of the compressor and the coil temperature at the current time of the indoor unit is greater than the fifth set value and continues for the second preset time, and it is determined that a difference between the coil temperature at the current time of the indoor unit is greater than or equal to the sixth set value, or that the temperature at the current time of the outdoor unit is greater than or equal to the seventh set value.
In the above preferred technical solution of the fire detection control method, in a case where the air conditioner is determined to be on fire, the fire detection control method further includes:
and further determining the ignition position of the air conditioner.
In the preferred technical solution of the fire detection control method, the step of determining the fire position of the air conditioner specifically includes:
if the coil temperature of the indoor unit at the current time is greater than or equal to the sixth set value, the indoor unit fires;
and if the coil temperature of the outdoor unit at the current time is greater than or equal to the seventh set value, the outdoor unit fires.
In the preferred technical scheme of the fire detection control method, the first preset time and the second preset time are both 5 minutes, the first set value is 10 ℃, the second set value is-5 ℃, the third set value is 5HZ, the fourth set value is 2 ℃, the fifth set value is 58 ℃, and the sixth set value and the seventh set value are both 100 ℃.
In a preferred embodiment of the above fire detection control method, the third preset time is 1 minute.
In the preferred technical scheme of the fire detection control method, the step of sending out a fire prompt comprises the following steps:
and the indoor unit buzzes and alarms.
In the preferable technical scheme of the fire detection control method, the step of "sending out a fire prompt" includes:
and sending prompt information to the user terminal.
Under the condition of adopting the technical scheme, the invention can accurately judge whether the air conditioner fires or not through the exhaust temperature of the compressor, the coil temperature of the indoor unit, the coil temperature of the outdoor unit, the running frequency of the compressor and the outdoor environment temperature which are acquired in real time, can stop the air conditioner in a steady state after the fires, avoid the situation that the air conditioner is in an unsteady state and aggravate fire caused by the immediate stop, can remind a user in time when the compressor stops, and is convenient for the user to know the air conditioner fires in time, so that the user can take countermeasures in time, such as timely notifying firefighters or escape, and the like, avoid the situation that the fire of the air conditioner is not known in time and the countermeasures are not taken in time, and simultaneously can give the user enough time to escape under the condition of serious fire, thereby improving the safety requirement of the air conditioner, and improving the user experience.
Further, besides the parameters of the air conditioner, namely the temperature of the exhaust before the compressor and the current temperature of the exhaust, the temperature of the coil before the indoor unit and the current temperature of the coil, the frequency of the operation before the compressor and the current frequency of the operation, the current temperature of the coil before the compressor and the current temperature of the coil of the indoor unit, the current temperature of the coil of the indoor unit and the current temperature of the coil of the outdoor unit are adopted, parameters of the non-air conditioner, namely the previous outdoor environment temperature and the current outdoor environment temperature, are adopted, so that the influence on the air conditioner caused by the change of the outdoor environment temperature is eliminated, the probability of misjudgment due to the parameters of the non-air conditioner is reduced, the accuracy of the fire judgment of the air conditioner is improved, the compressor adopts a coping strategy to remind a user at the same time under the condition of the actual fire of the air conditioner, and the user experience is further improved.
Further, by defining the position of the fire of the air conditioner, the user can conveniently adopt different coping strategies, for example, when the outdoor side of the air conditioner is on fire but the indoor side is not on fire, the user can timely inform firefighters indoors or adopt a corresponding solution by himself, and when the indoor side of the air conditioner is on fire, the user can escape first, so that the influence on the life safety of the user is avoided.
Furthermore, the user can be prompted to evacuate emergently by making the indoor unit buzzing alarm, so that the influence on the life safety of the user is avoided.
Further, through sending prompt information to the user terminal, the situation that the user cannot know in time due to the fact that the user is not at home but the air conditioner fires can be avoided, firefighters and other family members can be informed of taking corresponding measures in time when the user is not at home and the air conditioner fires is facilitated, and user experience is further improved.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
fig. 1 is a flowchart of a fire detection control method of an air conditioner according to the present invention;
fig. 2 is a flowchart of an embodiment of a fire detection control method of an air conditioner according to the present invention.
Detailed Description
It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. Those skilled in the art can adapt it as desired to suit a particular application.
It should be noted that, in the description of the present invention, although the respective steps of the control method of the present invention are described in a specific order in the present application, these orders are not limitative, and a person skilled in the art may perform the steps in a different order without departing from the basic principle of the present invention. Furthermore, the terms "first," second, "" third, "" fourth, "" fifth, "" sixth, "and seventh" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention provides a fire detection control method of an air conditioner, aiming at accurately judging whether the air conditioner fires or not, and timely notifying a user when the air conditioner fires, improving the safety of the air conditioner, meeting the safety requirement of the user and improving the user experience.
It should be noted that, aiming at the condition of the air conditioner firing, the inventor conducted intensive research, when the influence of the air conditioner firing is explored, the merits of each parameter of the air conditioner are compared, and the exhaust temperature of the compressor, the coil temperature of the indoor unit, the coil temperature of the outdoor unit and the running frequency of the compressor are selected from a plurality of air conditioner parameters as the relevant parameters of the air conditioner for comprehensively judging the air conditioner firing. In other words, when the influence of the fire on the air conditioner is explored, the inventor finds that the fire has a great influence on the coils of the compressor, the outdoor unit and the indoor unit, and is more beneficial to combination judgment, and the fan rotation speed of the indoor unit and the fan rotation speed of the outdoor unit are influenced by the dirt degree, frosting or condensed water on the fan, and the accuracy of the fire judgment of the air conditioner is affected, so that the accuracy of the fire judgment of the air conditioner is not beneficial to. Meanwhile, besides the parameters of the air conditioner, the invention also selects the outdoor environment temperature as the parameters of the non-air conditioner, thereby eliminating the influence of the outdoor environment temperature and avoiding the influence on the judgment of the fire accuracy caused by the temperature change of the outdoor environment.
For this purpose, as shown in fig. 1, the fire detection control method of the present invention includes:
in the running process of the air conditioner, the exhaust temperature TD of the compressor, the coil temperature TM of the indoor unit, the coil temperature TC of the outdoor unit, the running frequency F of the compressor and the outdoor environment temperature TAI are obtained in real time;
judging whether the air conditioner fires according to the exhaust temperature TD of the compressor, the coil temperature TM of the indoor unit, the coil temperature TC of the outdoor unit, the operating frequency F of the compressor and the outdoor environment temperature TAI;
and under the condition that the air conditioner is judged to be on fire, stopping the compressor after the set time and sending out a fire prompt.
In the above, the value range of the setting time is preferably 5 to 15 seconds, more preferably 10 seconds, and those skilled in the art can flexibly set the setting time in practical applications. According to the repeated researches of the inventor, the invention finds that when the air conditioner fires, unless the compressor is forced to stop due to the fires, if the air conditioner actively and immediately controls the compressor to stop under the condition that the air conditioner fires just, the whole air conditioner can be in a serious unsteady state, if the air conditioner fires due to the running problem of the air conditioner, the fire is aggravated at the moment, the air conditioner can stop in a relative steady state by stopping the compressor after a set time when the air conditioner fires, the fire aggravation is avoided, and the stopping mode of the compressor preferably adopts uniform speed-down stopping or stepwise speed-down stopping in a step state, for example, the stopping is completed within 10 to 15 seconds, compared with the stopping speed in the normal running state of the air conditioner.
Preferably, the step of determining whether the air conditioner is on fire according to the discharge temperature TD of the compressor, the coil temperature TM of the indoor unit, the coil temperature TC of the outdoor unit, the operating frequency F of the compressor, and the outdoor environment temperature TAI specifically includes:
judging whether a difference DeltaTD between an exhaust temperature TD1 before a first preset time T1 of the compressor and an exhaust temperature TD2 at a current time of the compressor is larger than or equal to a first set value T1, judging whether a difference DeltaTM between a coil temperature TM1 before the first preset time T1 of the indoor unit and a coil temperature TM2 at the current time of the indoor unit is larger than or equal to a second set value T2, judging whether a difference DeltaF between an operating frequency F1 before the first preset time T1 of the compressor and an operating frequency F2 at the current time of the compressor is smaller than or equal to a third set value F3, judging whether an absolute value DeltaTAI of a difference between an outdoor ambient temperature TAI1 before the first preset time T1 and an outdoor ambient temperature TAI2 at the current time is smaller than a fourth set value T4, judging whether a difference DeltaTD-TM 2 between the exhaust temperature TD2 at the current time of the compressor and the coil temperature TM2 at the current time of the indoor unit is larger than a fifth set value T5 and a duration of the second preset time T2, and judging whether a difference DeltaTM 2 between the temperature TD2 at the current time of the indoor unit and the coil temperature TM2 at the current time of the indoor unit is larger than or equal to a seventh set value T6 or larger than or equal to the seventh set value T2 at the current time or equal to the current temperature T6;
and judging whether the air conditioner fires according to the judging result.
Among the parameters of the air conditioner itself (i.e., the discharge temperature TD of the compressor, the coil temperature TM of the indoor unit, the coil temperature TC of the outdoor unit, and the operating frequency F of the compressor), a comparison determination is made between the difference TD2-TM2 between the discharge temperature TD2 of the current time of the compressor and the coil temperature TM2 of the current time of the indoor unit and the fifth set value T5 in addition to the difference calculation between the discharge temperature and the operating frequency of the compressor at the previous time and the current time, and the direct comparison between the coil temperature of the indoor unit and the coil temperature of the outdoor unit and the sixth set value and the seventh set value, respectively, therefore, the abnormal operation of the compressor and the misjudgment caused by inaccurate detection of the coil temperature sensor of the indoor unit and the coil temperature sensor of the outdoor unit are avoided, namely, in extreme cases, the abnormal operation of the compressor possibly occurs to cause the deviation of the exhaust temperature and the operation frequency of the compressor in the previous time and the current time, the abnormal detection of the coil temperature of the indoor unit and the coil temperature of the outdoor unit is also possibly caused by the self reasons, but on the basis, the probability of meeting the comparison condition of TD2-TM2 and T5 is basically zero.
In a specific case, if it is determined that the difference DeltaTD between the discharge temperature TD1 before the first preset time T1 of the compressor and the discharge temperature TD2 at the current time of the compressor is greater than or equal to the first set value T1 and it is determined that the difference DeltaTM between the coil temperature TM1 before the first preset time T1 of the indoor unit and the coil temperature TM2 at the current time of the indoor unit is greater than or equal to the second set value T2 and it is determined that the difference DeltaF between the operating frequency F1 before the first preset time T1 of the compressor and the operating frequency F2 at the current time of the compressor is less than or equal to the third set value F3, and determining that an absolute value delta TAI of a difference between the outdoor ambient temperature TAI1 before the first preset time T1 and the outdoor ambient temperature TAI2 at the current time is smaller than a fourth set value T4, determining that a difference TD2-TM2 between the discharge temperature TD2 at the current time of the compressor and the coil temperature TM2 at the current time of the indoor unit is larger than a fifth set value T5 for a second preset time T2, and determining that the coil temperature TM2 at the current time of the indoor unit is larger than or equal to a sixth set value T6 or that the coil temperature TC2 at the current time of the outdoor unit is larger than or equal to a seventh set value T7, and determining that the air conditioner fires.
It should be noted that, in the above description, ΔTD is greater than or equal to T1, ΔTM is greater than or equal to T2, ΔF is greater than or equal to F3, ΔTAI is less than T4, and TD2-TM2 is greater than T5, and the duration of the second preset time T2 is required to be satisfied at the same time, and TM2 is greater than or equal to T6 and TC2 is greater than or equal to T7, and only one of them is required to be satisfied to determine that the air conditioner fires. And when the air conditioner fires, whether the indoor unit fires or the outdoor unit fires can be judged through the comparison results of the TM2 and the T6 and the TC2 and the T7, so that the fire position of the air conditioner is further determined. And if the coil temperature TM2 of the indoor unit at the current time is greater than or equal to a sixth set value T6, judging that the indoor unit fires, if the coil temperature TC2 of the outdoor unit at the current time is greater than or equal to a seventh set value T7, judging that the outdoor unit fires, and if the two conditions are met at the same time, judging that both the indoor unit and the outdoor unit fire.
Further preferably, a time limit is added to the conditions of ΔTD being greater than or equal to T1, ΔTM being greater than or equal to T2, ΔF being greater than or equal to F3, ΔTAI being less than T4, TD2-TM2 being greater than or equal to T5, and TM2 being greater than or equal to T6 or TC2 being greater than or equal to T7, that is, the condition is met within the time limit, so that the fire of the air conditioner is judged, the accuracy of detection is further improved, and through the test of the inventor, the possibility of misjudgment of the air conditioner is basically zero under the condition. That is, if within the third preset time T3, it is determined that the difference Δtd between the discharge temperature TD1 before the first preset time T1 of the compressor and the discharge temperature TD2 at the present time of the compressor is greater than or equal to the first set value T1, and it is determined that the difference Δtm between the coil temperature TM1 before the first preset time T1 of the indoor unit and the coil temperature TM2 at the present time of the indoor unit is greater than or equal to the second set value T2, and it is determined that the difference Δf between the operating frequency F1 before the first preset time T1 of the compressor and the operating frequency F2 at the present time of the compressor is less than or equal to the third set value F3, and it is determined that the absolute value Δtai between the outdoor ambient temperature TAI1 before the first preset time T1 and the outdoor ambient temperature TAI2 at the present time is less than the fourth set value T4, and it is determined that the difference 2-TM2 between the discharge temperature TM2 at the present time of the compressor and the coil temperature TM2 at the present time of the indoor unit is greater than or equal to the fifth set value T5, and the difference Δtai between the operating frequency F1 before the first preset time T1 of the compressor and the operating frequency F2 at the present time of the compressor is greater than or equal to the third set value F3, and it is determined that the difference Δtai between the outdoor ambient temperature TAI1 before the first preset time and the outdoor ambient temperature TAI2 is greater than or equal to the fourth set value T2 is equal to the fourth set value T2.
The specific values of the first preset time T1, the second preset time T2, the third preset time T3, the first set value T1, the second set value T2, the third set value F3, the fourth set value T4, the fifth set value T5, the sixth set value T6 and the seventh set value T7 can be flexibly set in practical applications by those skilled in the art, for example: the first preset time T1 and the second preset time T2 are both 5 minutes, the third preset time T3 is 1 minute, the first set value T1 is 10 degrees celsius, the second set value T2 is-5 degrees celsius, the third set value F3 is 5HZ, the fourth set value T4 is 2 degrees celsius, the fifth set value T5 is 58 degrees celsius, and the sixth set value T6 and the seventh set value T7 are both 100 degrees celsius.
It should be noted that, when the third preset time T3 is smaller than the second preset time T2, it is explained that TD2-TM2 > T5 needs to satisfy the condition that the second preset time T2 has been continued within the determination time of the third preset time T3, and once the condition of this second preset time T2 is not satisfied and it is not determined that the air conditioner fires, and if one of Δtd Σt1, Δtm ΔΣt2, Δf Δf3, and Δtai < T4 is not satisfied or TM2 Δt6 and TC2 Δt7 is not satisfied just when TD2-TM2 > T5 is satisfied and the second preset time T2 is continued, it is not determined that the air conditioner fires either.
Further, in the above, if DeltaTD < T1, deltaTM < T2, deltaF > F3, deltaTAI.gtoreq.T4, TD2-TM 2.ltoreq.T5 or TD2-TM2 > T5 but not for the second preset time T2, or TM2 < T6 and TC2 < T7, it is determined that the air conditioner does not fire.
Preferably, in the present invention, the step of "giving a fire notice" includes: the indoor unit buzzes and alarms. Specifically, a buzzer in communication with a controller of the air conditioner may be provided on a casing of the indoor unit, and when the air conditioner fires, a user in the room is prompted by controlling the buzzer to buzzing by the controller.
Preferably, in the present invention, the controller of the air conditioner communicates with a user terminal (e.g., a mobile phone, a tablet, a smart bracelet/watch, etc.), and the step of "issuing a fire notification" includes: and sending prompt information to the user terminal. Specifically, a short message or an automatic push phone reminder can be sent to the user terminal, and a voice prompt can be sent to the user terminal, or the APP of the user terminal can automatically pop up the prompt information.
In the above, it is preferable that the indoor unit buzzing alarm and the prompt message sending to the user terminal are executed, so that the indoor user can be timely prompted by the indoor unit buzzing alarm, and the situation that the user cannot respond timely due to the fact that the air conditioner fires when the user is not at home can be avoided by sending the prompt message to the user terminal.
The technical solution of the present invention will be described below with reference to a specific embodiment.
As shown in fig. 2, during the operation of the air conditioner, the discharge temperature TD of the compressor, the coil temperature TM of the indoor unit, the coil temperature TC of the outdoor unit, the operation frequency F of the compressor, and the outdoor ambient temperature TAI are obtained in real time;
judging whether the difference DeltaTD between the exhaust temperature of the compressor before 5 minutes and the current exhaust temperature is more than or equal to 10 ℃, whether the difference DeltaTM between the coil temperature of the indoor unit before 5 minutes and the current coil temperature is more than or equal to-5 ℃, whether the difference DeltaF between the operating frequency of the compressor before 5 minutes and the current operating frequency is less than or equal to 5HZ, whether the absolute value DeltaTAI between the difference DeltaTAI between the outdoor environment temperature before 5 minutes and the current outdoor environment temperature is less than 2 ℃ (eliminating the influence of the outdoor environment temperature on the fire judgment), whether the difference TD2-TM2 between the exhaust temperature of the current compressor and the coil temperature of the indoor unit is more than 58 ℃ and has been lasting for 5 minutes, and whether TM2 is more than or equal to 100 ℃ or TC2 is more than or equal to 100 ℃.
If the difference DeltaTD between the discharge temperature of the compressor before 5 minutes and the current discharge temperature is more than or equal to 10 ℃ and the difference DeltaTM between the coil temperature of the indoor unit before 5 minutes and the current coil temperature is more than or equal to-5 ℃, the difference DeltaF between the operating frequency of the compressor before 5 minutes and the current operating frequency is less than or equal to 5HZ, the absolute value DeltaTAI between the difference DeltaTAI between the outdoor environment temperature before 5 minutes and the current outdoor environment temperature is less than 2 ℃, the difference TD between the discharge temperature of the current compressor and the coil temperature of the indoor unit is more than 58 ℃ and has been continued for 5 minutes, and TM2 is more than or equal to 100 ℃ or TC2 is more than or equal to 100 ℃, the air conditioner is judged to be on fire, if not, the air conditioner is continuously judged to be on fire, after the air conditioner is judged to be on fire, the air conditioner is stopped, the indoor unit is buzzed to prompt and prompt information is sent to a user after 10 seconds.
In the invention, the sensor for detecting the outdoor environment temperature needs to ensure that the setting position of the sensor is not affected when the air conditioner fires, for example, the outdoor environment temperature sensor can be set far away from the air conditioner, at this time, the outdoor environment temperature sensor is only required to be communicated with the controller of the air conditioner, if the outdoor environment temperature sensor is arranged on the shell of the outdoor unit, a fireproof plate can be arranged on the shell to prevent the fire from flowing to the position of the outdoor environment temperature sensor, the accuracy of the detection of the outdoor environment temperature sensor is prevented from being affected, in addition, the outdoor environment temperature is preferably obtained through weather forecast, so that the influence on the detection of the outdoor environment temperature is prevented when the air conditioner fires, and for this reason, a communication module with a fireproof protection structure can be arranged on the air conditioner, and the communication interaction between the controller and the cloud server is realized through the communication module, so that weather forecast data is downloaded.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.

Claims (8)

1. A fire detection control method of an air conditioner, the fire detection control method comprising:
in the running process of the air conditioner, the exhaust temperature of the compressor, the coil temperature of the indoor unit, the coil temperature of the outdoor unit, the running frequency of the compressor and the outdoor environment temperature are obtained in real time;
determining whether the air conditioner fires according to the discharge temperature of the compressor, the coil temperature of the indoor unit, the coil temperature of the outdoor unit, the operating frequency of the compressor and the outdoor environment temperature;
under the condition that the air conditioner is judged to be on fire, stopping the compressor after the set time and sending out a fire prompt;
the step of determining whether the air conditioner fires according to the discharge temperature of the compressor, the coil temperature of the indoor unit, the coil temperature of the outdoor unit, the operating frequency of the compressor, and the outdoor environment temperature specifically includes:
judging whether the difference between the discharge temperature before the first preset time of the compressor and the discharge temperature at the current time of the compressor is larger than or equal to a first set value, judging whether the difference between the coil temperature before the first preset time of the indoor unit and the coil temperature at the current time of the indoor unit is larger than or equal to a second set value, judging whether the difference between the operating frequency before the first preset time of the compressor and the operating frequency at the current time of the compressor is smaller than or equal to a third set value, judging whether the absolute value of the difference between the outdoor environment temperature before the first preset time and the outdoor environment temperature at the current time is smaller than a fourth set value, judging whether the difference between the discharge temperature at the current time of the compressor and the coil temperature at the current time of the indoor unit is larger than a fifth set value and continuously for a second preset time, and judging whether the coil temperature at the current time of the indoor unit is larger than or equal to a sixth set value or whether the coil temperature at the current time of the outdoor unit is larger than or equal to a seventh set value;
judging whether the air conditioner fires according to the judging result; the step of judging whether the air conditioner fires according to the judgment result specifically comprises the following steps:
if it is determined that the difference between the discharge temperature before the first preset time of the compressor and the discharge temperature at the present time of the compressor is greater than or equal to the first set value, and it is determined that the difference between the discharge temperature before the first preset time of the indoor unit and the coil temperature at the present time of the indoor unit is greater than or equal to the second set value, and it is determined that the difference between the operating frequency before the first preset time of the compressor and the operating frequency at the present time of the compressor is less than or equal to the third set value, and it is determined that the absolute value of the difference between the outdoor ambient temperature before the first preset time and the outdoor ambient temperature at the present time is less than the fourth set value, and it is determined that the difference between the discharge temperature at the present time of the compressor and the coil temperature at the present time of the indoor unit is greater than the fifth set value and continues for the second preset time, and it is determined that the coil temperature at the present time of the indoor unit is greater than or equal to the sixth set value, or the coil temperature at the present time of the outdoor unit is greater than or equal to the seventh set value, the air conditioner is determined.
2. The fire detection control method according to claim 1, wherein if it is determined that a difference between a discharge temperature before a first preset time of the compressor and a discharge temperature at a current time of the compressor is greater than or equal to the first set value, and it is determined that a difference between a coil temperature before the first preset time of the indoor unit and a coil temperature at a current time of the indoor unit is greater than or equal to the second set value, and it is determined that a difference between an operating frequency before the first preset time of the compressor and an operating frequency at a current time of the compressor is less than or equal to the third set value, and it is determined that an absolute value of a difference between an outdoor ambient temperature before the first preset time and an outdoor ambient temperature at a current time is less than the fourth set value, and it is determined that a difference between a discharge temperature at a current time of the compressor and a coil temperature at a current time of the indoor unit is greater than the fifth set value and continues for the second preset time, and it is determined that a difference between a coil temperature at a current time of the indoor unit is greater than or equal to the sixth set value, and it is determined that a difference between an operating frequency before the first preset time of the compressor and an operating frequency of the compressor is greater than or equal to the third set value, and it is determined that an outdoor ambient temperature at a temperature of the outdoor ambient temperature at the current time of the indoor unit is greater than or equal to the seventh set value:
if, within a third preset time, it is determined that a difference between the discharge temperature before the first preset time of the compressor and the discharge temperature at the current time of the compressor is greater than or equal to the first set value, and it is determined that a difference between the coil temperature before the first preset time of the indoor unit and the coil temperature at the current time of the indoor unit is greater than or equal to the second set value, and it is determined that a difference between the operating frequency before the first preset time of the compressor and the operating frequency at the current time of the compressor is less than or equal to the third set value, and it is determined that an absolute value of a difference between the outdoor ambient temperature before the first preset time and the outdoor ambient temperature at the current time is less than the fourth set value, and it is determined that a difference between the discharge temperature at the current time of the compressor and the coil temperature at the current time of the indoor unit is greater than the fifth set value and continues for the second preset time, and it is determined that a difference between the coil temperature at the current time of the indoor unit is greater than or equal to the sixth set value, or that the temperature at the current time of the outdoor unit is greater than or equal to the seventh set value.
3. The fire detection control method according to claim 1 or 2, characterized in that in the case where it is determined that the air conditioner fires, the fire detection control method further comprises:
and further determining the ignition position of the air conditioner.
4. The fire detection control method according to claim 3, wherein the step of "determining a fire position of the air conditioner" specifically includes:
if the coil temperature of the indoor unit at the current time is greater than or equal to the sixth set value, the indoor unit fires;
and if the coil temperature of the outdoor unit at the current time is greater than or equal to the seventh set value, the outdoor unit fires.
5. The fire detection control method according to claim 1 or 2, wherein the first preset time and the second preset time are each 5 minutes, the first set value is 10 degrees celsius, the second set value is-5 degrees celsius, the third set value is 5HZ, the fourth set value is 2 degrees celsius, the fifth set value is 58 degrees celsius, and the sixth set value and the seventh set value are each 100 degrees celsius.
6. The fire detection control method according to claim 2, wherein the third preset time is 1 minute.
7. The fire detection control method according to claim 1 or 2, characterized in that the step of "giving a fire notice" includes:
and the indoor unit buzzes and alarms.
8. The fire detection control method according to claim 1 or 2, wherein the controller of the air conditioner communicates with a user terminal, and the step of "issuing a fire notice" includes:
and sending prompt information to the user terminal.
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