CN104142001A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN104142001A CN104142001A CN201310170177.1A CN201310170177A CN104142001A CN 104142001 A CN104142001 A CN 104142001A CN 201310170177 A CN201310170177 A CN 201310170177A CN 104142001 A CN104142001 A CN 104142001A
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- 238000000034 method Methods 0.000 title claims abstract description 78
- 238000010438 heat treatment Methods 0.000 claims abstract description 175
- 238000001816 cooling Methods 0.000 claims abstract description 38
- 238000007791 dehumidification Methods 0.000 claims abstract description 22
- 238000005057 refrigeration Methods 0.000 claims description 80
- 238000010257 thawing Methods 0.000 claims description 40
- 230000002265 prevention Effects 0.000 claims description 32
- 239000002918 waste heat Substances 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 8
- 230000000737 periodic effect Effects 0.000 claims description 3
- 230000006870 function Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 8
- 238000004590 computer program Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
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- 239000007983 Tris buffer Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
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- 238000007710 freezing Methods 0.000 description 1
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Abstract
An air conditioner and a control method thereof are disclosed. The control method comprises the steps of detecting whether the ring temperature sensor and the pipe temperature sensor have faults or not; if and only if the environment temperature sensor has faults, determining a first fault mode, and periodically starting and stopping the air conditioner; the air conditioner runs in the first failure mode after being started; the first failure mode includes a cooling mode, a dehumidification mode, and a heating mode. The air conditioner adopts the control method to control the operation of the air conditioner. When detecting only the fault of the environment temperature sensor, the air conditioner is not stopped immediately, but the running mode at the moment is determined, the air conditioner is started and stopped periodically, and the running mode when the air conditioner is started is the determined running mode, so that the air conditioner can still meet the determined refrigerating/heating requirement before the fault, the utilization rate of the air conditioner is improved, and the problem of the prior art is solved.
Description
Technical Field
The application relates to the technical field of detection, in particular to an air conditioner and a control method thereof.
Background
The temperature sensor in the air conditioner indoor unit comprises an environment temperature sensor and a pipe temperature sensor, and the environment temperature sensor is generally installed and fixed at an air inlet of the air conditioner indoor unit or other positions which are less influenced by the air outlet temperature of the air conditioner and used for detecting the current indoor environment temperature; the tube temperature sensor is generally installed and fixed on the U tube of the evaporator and used for detecting the tube temperature of the evaporator. The control mode of the existing air conditioner is as follows: on the premise that both the environment temperature sensor and the pipe temperature sensor have no faults, the refrigerating/heating requirements of the air conditioner are judged by comparing the environment temperature detected by the environment temperature sensor with the temperature set by a user; meanwhile, according to the temperature of the U tube of the evaporator detected by the tube temperature sensor, the control of cold air prevention, high temperature prevention and the like is carried out by combining the ambient temperature. And controlling the air conditioner to stop running once the fault of any temperature sensor is detected. The control mode causes the normal operation of the air conditioner to be greatly influenced by the temperature sensor, and the utilization rate of the air conditioner is low.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an air conditioner and a control method thereof, so as to solve the problems that the normal operation of the air conditioner is greatly affected by a temperature sensor and the utilization rate of the air conditioner is low in the existing control method.
In order to achieve the above purpose, the present application provides the following technical solutions:
a control method of an air conditioner, comprising:
respectively detecting whether the ring temperature sensor and the pipe temperature sensor have faults or not;
if and only if the environment temperature sensor has faults, determining a first fault mode, and periodically starting and stopping the air conditioner; wherein,
the air conditioner runs in the first failure mode after being started;
the first fault mode represents an operation mode of the air conditioner when the fault of the ambient temperature sensor is detected; the first failure mode includes a cooling mode, a dehumidification mode, and a heating mode.
Preferably, the determining the first failure mode, periodically starting and stopping the air conditioner, and operating the air conditioner in the first failure mode after the air conditioner is started includes:
when the current working mode is determined to be the cooling mode or the dehumidification mode, executing the following steps:
step S211, controlling the air conditioner to operate in a refrigeration mode, and starting refrigeration operation timing;
step S212, when the refrigerating operation timing length reaches a preset refrigerating operation length, controlling the air conditioner to stop operating, clearing the refrigerating operation timing length, and starting refrigerating waiting timing;
step S213, when the refrigeration waiting timing duration reaches a preset refrigeration waiting duration, starting the air conditioner and operating in a refrigeration mode, clearing the refrigeration waiting timing duration, starting refrigeration operation timing, and returning to the step S212;
when the current working mode is determined to be the heating mode, executing the following steps:
step S221, controlling the air conditioner to operate in a heating mode, and starting heating operation timing;
step S222, when the heating operation timing length reaches a preset heating operation time length, controlling the air conditioner to stop operating, clearing the heating operation timing length, and starting heating waiting timing;
step S223, when the heating wait time reaches a preset heating wait time, starting the air conditioner and operating in a heating mode, clearing the heating wait time, starting heating operation time, and returning to the step S222.
Preferably, the preset refrigerating operation time length is not greater than the preset heating operation time length, and the preset refrigerating waiting time length is not less than the preset heating waiting time length.
Preferably, the method further comprises:
determining a second failure mode if and only if the tube temperature sensor fails; the second fault mode represents an operation mode of the air conditioner when the pipe temperature sensor is detected to be in fault; the second failure mode comprises a cooling mode, a dehumidification mode, a heating mode and an air supply mode;
when the second failure mode is a heating mode, executing the following steps:
step S311, judging whether a heating requirement exists according to the environment temperature detected by the environment temperature sensor and the heating temperature set by a user; if yes, the compressor and the four-way valve are started, heating timing is started, and the step S312 is continuously executed;
step S312, when the heating timing duration reaches a preset heating first duration, closing a four-way valve, clearing the heating timing duration and starting defrosting timing;
step 313, when the defrosting timing duration reaches a preset defrosting duration, a four-way valve is opened, the defrosting timing duration is cleared, the heating timing is started, and the step 312 is returned;
when the second failure mode is a cooling mode or a dehumidification mode, executing the following steps:
step S321, judging whether a refrigeration demand exists according to the environment temperature detected by the environment temperature sensor and the refrigeration temperature set by a user; if so, starting the compressor, the inner fan and the outer fan, closing the four-way valve, starting the first timing of refrigeration, and continuing to execute the step S322;
step S322, when the first refrigeration timing duration reaches a preset first refrigeration duration and the environment temperature is lower than a preset anti-frosting temperature, closing the compressor and the outer fan, resetting the first refrigeration timing duration, and starting second refrigeration timing;
step S323, when the second refrigeration timing length reaches a preset second refrigeration timing length, starting a compressor and an external fan, resetting the second refrigeration timing length, starting the first refrigeration timing, and returning to the step S322;
and when the second failure mode is an air supply mode, closing the compressor, the outer fan and the four-way valve, and controlling the inner fan to operate according to the air speed set by the user.
Preferably, at the same time of starting the heating timer, the method further comprises turning off an inner fan;
simultaneously with the start of the defrost timing, the method further comprises turning off the inner fan;
after the beginning of the heating timer, the method further comprises:
when the heating timing time length is longer than a preset heating second time length and shorter than a preset heating third time length, starting the inner fan and controlling the inner fan to operate at a preset low wind speed;
and when the heating timing time length is longer than the preset heating third time length and shorter than the preset heating first time length, controlling the inner fan to operate according to a preset normal wind speed.
Preferably, after the heating timer is started, the method further includes:
judging whether the environment temperature detected by the environment temperature sensor reaches the heating temperature set by a user, if so, closing the compressor, controlling the inner fan to operate at a low wind speed, and starting to blow waste heat for timing;
and when the timing duration of the waste heat blowing reaches the preset time duration of the waste heat blowing, closing the inner fan.
Preferably, at the same time of starting the heating timer, the method further comprises starting an external fan and starting a first high temperature prevention timer;
after the heating timer is started and before the defrosting timer is started, the method further comprises the following steps:
step S51, when the first high temperature prevention timing duration reaches a preset first high temperature prevention timing duration, closing the outer fan, resetting the first high temperature prevention timing duration, and starting second high temperature prevention timing;
step S52, when the second high-temperature-prevention timing duration reaches a preset second high-temperature-prevention timing duration, starting an outer fan, resetting the second high-temperature-prevention timing duration, starting the first high-temperature-prevention timing, and returning to the step S51;
simultaneously with the start of the defrost timing, the method further includes turning off the outer fan.
Preferably, the method further comprises:
when the environment temperature sensor and the pipe temperature sensor both have faults, determining a third fault mode; the third fault mode represents an operation mode of the air conditioner when the environment temperature sensor and the pipe temperature sensor are detected to be in fault; the third failure mode comprises a cooling mode, a dehumidification mode, a heating mode and an air supply mode;
when the third failure mode is a heating mode, executing the following steps:
step S611, starting a compressor and a four-way valve, starting heating timing, and continuing to execute step S612;
step S612, when the heating timing duration reaches a preset heating first duration, closing a four-way valve, resetting the heating timing duration and starting defrosting timing;
step S613, when the defrosting time-keeping duration reaches the preset defrosting time-keeping duration, starting a four-way valve, clearing the defrosting time-keeping duration, starting the heating time-keeping, and returning to the step S612;
when the third failure mode is a cooling mode or a dehumidification mode, executing the following steps:
step S621, starting the compressor, the inner fan and the outer fan, closing the four-way valve, starting first timing of refrigeration, and continuing to execute step S622;
step S622, when the first refrigeration timing duration reaches a preset first refrigeration duration, closing a compressor and an external fan, resetting the first refrigeration timing duration, and starting second refrigeration timing;
step S623, when the refrigeration second timing duration reaches a preset refrigeration second timing duration, starting a compressor and an external fan, resetting the refrigeration second timing duration, starting the refrigeration first timing, and returning to the step S622;
and when the third failure mode is an air supply mode, closing the compressor, the outer fan and the four-way valve, and controlling the inner fan to operate according to the air speed set by the user.
Preferably, at the same time of starting the heating timer, the method further comprises starting an external fan and starting a first high temperature prevention timer;
after the heating timer is started and before the defrosting timer is started, the method further comprises the following steps:
step S71, when the first high temperature prevention timing duration reaches a preset first high temperature prevention timing duration, closing the outer fan, resetting the first high temperature prevention timing duration, and starting second high temperature prevention timing;
step S72, when the second high-temperature-prevention timing duration reaches a preset second high-temperature-prevention timing duration, starting an outer fan, resetting the second high-temperature-prevention timing duration, starting the first high-temperature-prevention timing, and returning to the step S71;
simultaneously with the start of the defrost timing, the method further includes turning off the outer fan.
An air conditioner adopts the control method to control the operation of the air conditioner.
According to the technical scheme, when the fault of only the ambient temperature sensor is detected, the air conditioner is not stopped immediately, the current running mode is determined, the air conditioner is started and stopped periodically, and the running mode when the air conditioner is started is the determined running mode. Therefore, under the condition that only the ambient temperature sensor fails, the air conditioner can still meet the cooling/heating requirements determined before the failure, and the basic cooling and heating functions are not completely lost, so that the influence of the temperature sensor on the air conditioner is reduced to a certain extent, the utilization rate of the air conditioner is improved, and the problems in the prior art are solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a control method of an air conditioner according to a second embodiment of the present application;
fig. 3 is a flowchart of a control method of an air conditioner according to a third embodiment of the present application;
fig. 4 is a flowchart of a method for preventing cold air from being controlled in a control method of an air conditioner according to a third embodiment of the present application;
fig. 5 is a flowchart of a method for preventing high temperature control in a control method of an air conditioner according to a third embodiment of the present application;
fig. 6 is a flowchart of a control method of an air conditioner when a loop temperature sensor and a tube temperature sensor fail simultaneously according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
The embodiment of the application discloses an air conditioner and a control method thereof, and aims to solve the problems that normal operation of the air conditioner is influenced too much by a temperature sensor and the utilization rate of the air conditioner is low in the existing control mode.
Referring to fig. 1, a method for controlling an air conditioner according to a first embodiment of the present application includes the following steps:
s101: respectively detecting whether the ring temperature sensor and the pipe temperature sensor have faults or not;
s102: if and only if the environment temperature sensor has faults, determining a first fault mode, and periodically starting and stopping the air conditioner; and the air conditioner runs in the first failure mode after being started.
The first failure mode represents an operation mode of the air conditioner when a failure of the ambient temperature sensor is detected, and may specifically be a cooling mode, a dehumidification mode or a heating mode.
The applicant finds that when the ambient temperature sensor fails, the air conditioner cannot judge the cooling/heating requirement according to the ambient temperature and the set temperature of a user because the current ambient temperature cannot be detected, and the air conditioner cannot be controlled to switch among a cooling mode, a dehumidification mode, a heating mode and a stop operation according to the requirement. Since the tube temperature sensor has no fault, the protection functions related to the temperature of the U tube (such as the anti-freezing function in the cooling mode and the high temperature prevention function in the heating mode) can still be normally executed as long as the air conditioner does not stop running.
In the embodiment of the present application, when it is detected that the ambient temperature sensor has a fault and the tube temperature sensor is normal, the current operation mode of the air conditioner (i.e., the first fault mode) is determined, and the air conditioner is periodically started and stopped, and the operation mode when the air conditioner is started is kept unchanged from the first fault mode, and in this mode, the protection function related to the temperature of the U tube can be normally executed.
For example, when the ambient temperature sensor is detected to be faulty and the pipe temperature sensor is normal, the air conditioner is operating in the heating mode (that is, the first fault mode is determined as the heating mode), the air conditioner stops when the operating time of the air conditioner in the heating mode reaches a preset time (assuming that the preset time is t 1), and restarts to resume the heating mode operation when the accumulated time of stopping reaches another preset time (assuming that the another preset time is t 2); the process is circulated (i.e. the cycle period is t1+ t 2). Wherein, in the air conditioner operation process, still can prevent protection function such as high temperature according to the U pipe temperature execution that pipe temperature sensor detected. The specific values of t1 and t2 may depend on the application and are not limited herein.
According to the steps of the method, when the fault of only the ambient temperature sensor is detected, the air conditioner is not stopped immediately, the current operation mode is determined, the air conditioner is started and stopped periodically, and the operation mode when the air conditioner is started is the determined operation mode. Therefore, under the condition that only the ambient temperature sensor fails, the air conditioner can still meet the cooling/heating requirements determined before the failure, and the basic cooling and heating functions are not completely lost, so that the influence of the temperature sensor on the air conditioner is reduced to a certain extent, the utilization rate of the air conditioner is improved, and the problems in the prior art are solved.
In step S101 of the above embodiment, the fault detection of the ambient temperature sensor and the pipe temperature sensor may be real-time detection or detection at regular intervals. At any time in the cycle process of the periodic start-stop of the air conditioner, if the fault state of the ambient temperature sensor or the pipe temperature sensor is detected to change or a user remote control shutdown instruction is received, the cycle process of the periodic start-stop is stopped. In addition, if both sensors have no fault, the air conditioner operates normally.
Referring to fig. 2, a method for controlling an air conditioner according to a second embodiment of the present application includes the following steps:
s2100: respectively detecting whether the ring temperature sensor and the pipe temperature sensor have faults or not;
s2200: if and only if the ambient temperature sensor fails, determining the operation mode of the air conditioner at the moment, namely a first failure mode; if the first failure mode is the cooling mode or the dehumidification mode, executing step S2211, and if the first failure mode is the heating mode, executing step S2221;
s2211, controlling the air conditioner to operate in a cooling mode, and starting a cooling operation timer tC1；
S2212, timing time t when refrigerating operation is performedC1The preset refrigerating operation time t is reachedC1When the air conditioner is started, the air conditioner is controlled to stop running, and the refrigerating running is timed for a time tC1Reset, start of refrigeration wait timer tC2；
S2213, timing time t when the refrigeration is waited forC2Achieve preset refrigerationWaiting time tC2When the air conditioner is started, the air conditioner is operated in a cooling mode, and the cooling waiting time is timed for a time tC2Reset and start of refrigeration operation timing tC1And returns to step S2212;
s2221, controlling the air conditioner to operate in a heating mode, and starting a heating operation time tH1；
S2222, when heating operation timing time tH1Reaching the preset heating operation time tH1When the air conditioner is started, the air conditioner is controlled to stop running, and the heating running is timed for a time tH1Reset to zero, start heating wait timer tH2；
S2223, when heating waits for time tH2Reaching the preset heating waiting time tH2When the air conditioner is started and runs in a heating mode, the heating waiting time is timed for a time tH2Reset and start heating operation timer tH1And returns to step S2222.
The second embodiment of the application provides a specific method for periodically starting and stopping the air conditioner if and only if the ambient temperature sensor fails. Wherein the preset refrigerating operation time length tC1', presetting refrigeration waiting time length tC2', preset heating operation time length tH1' and a preset heating wait period tH2The specific value of' is determined by the actual application and is not limited herein.
Further, in order to avoid the too fast change of the indoor environment temperature and improve the comfort of the user, in the second embodiment, tC1’≤tH1’，tC2’≥tH2’。
Referring to fig. 3, a method for controlling an air conditioner according to a third embodiment of the present application includes the following steps:
s3100: respectively detecting whether the ring temperature sensor and the pipe temperature sensor have faults or not; if and only if the ring temperature sensor is out of order, performing step S3200; if and only if the tube temperature sensor is out of order, performing step S3300;
s3200: determining a first failure mode, and periodically starting and stopping the air conditioner; the air conditioner runs in the first failure mode after being started;
the specific method for periodically starting and stopping the air conditioner can refer to the second embodiment, and is not described herein again.
S3300: determining a second failure mode; when the second failure mode is the heating mode, executing step S3310; when the second failure mode is a cooling mode or a dehumidification mode, executing step S3320; when the second failure mode is the air supply mode, executing step S3330;
the second failure mode represents an operation mode of the air conditioner including a cooling mode, a dehumidifying mode, a heating mode, and an air supply mode when the failure of the duct temperature sensor is detected.
S3310, according to the environment temperature T detected by the environment temperature sensor and the heating temperature T set by the userRJudging whether a heating requirement exists; if yes, the compressor and the four-way valve are started, and the heating timer t is startedRAnd continuing to execute the step S3311, otherwise, controlling the air conditioner to stop running;
the environment temperature sensor has no fault, so the environment temperature T detected by the environment temperature sensor and the heating temperature T set by the user can be usedRWhether a heating requirement exists in the current environment is judged, and the specific judgment mode refers to the prior art and is not described herein again. After the compressor and the four-way valve are opened, the air conditioner starts to heat, so that the ambient temperature is increased.
S3311, heating time timing tRReaching the preset heating first time tR1When the heating system is started, the four-way valve is closed, and the heating timing time is tRReset and start defrost timing tS；
Due to the failure of the tube temperature sensor, whether defrosting is needed or not can not be judged according to the temperature of the U tube of the evaporator. Therefore, in order to prevent the outdoor unit from frosting and affecting the heating effect of the indoor unit in the heating process, the heating time duration t is setRTo achieve the preset systemA first duration of heat tR1When the defrosting mode is adopted, the four-way valve is closed, and the system carries out the defrosting mode, namely the condenser of the outdoor unit is in a heating state, and frost on the condenser is dissolved.
S3312, timing time t when defrostingSReaches the preset defrosting time tSWhen the defrosting time is up, the four-way valve is opened, and the defrosting time is timed for a period tSReset and start heating timer tRAnd returns to step S3311;
as can be seen from steps S3311 and S3312, when only the tube temperature sensor fails, if there is a heating demand, the air conditioner is controlled to operate in a cycle of heating and defrosting (the cycle period is t)R1’+tS') to prevent frosting of an outdoor unit while satisfying a heating demand.
S3320, according to the environment temperature T detected by the environment temperature sensor and the refrigeration temperature T set by the userLJudging whether a refrigeration demand exists; if yes, the compressor, the inner fan and the outer fan are started, the four-way valve is closed, and the first refrigeration timing t is startedL1And continuing to execute the step S3321, otherwise controlling the air conditioner to stop running;
s3321, when the refrigeration is carried out, the first timing duration tL1Reaches a preset first refrigerating time tL1'and when the environmental temperature T is less than the preset anti-frosting temperature T', the compressor and the outer fan are closed, and the refrigeration is carried out for a first timing time TL1Reset and start the second timing t of refrigerationL2；
Due to the failure of the tube temperature sensor, the anti-frosting protection can not be carried out according to the temperature of the U tube of the evaporator. Therefore, in order to prevent the evaporator from frosting, in the refrigeration process of the air conditioner, if the ambient temperature is lower than the preset frosting prevention temperature T', the compressor and the outer fan are closed, and only the inner fan is kept running, so that the evaporator is frosted.
S3322, when cooling, the second timing time tL2Reaches the preset second refrigerating time tL2When the compressor and the external fan are started, the refrigeration is carried out for a second timing duration tL2Reset and restart the refrigeration for the first timeTiming tL1And returns to step S3321;
as can be seen from steps S3321 and S3322, when only the tube temperature sensor fails, if there is a cooling demand, the air conditioner is controlled to perform a circulation operation in both cooling and defrosting states (the circulation period is t)L1’+tL2') to prevent evaporator frosting while meeting refrigeration or dehumidification requirements.
S3330, closing the compressor, the outer fan and the four-way valve, and controlling the inner fan to operate according to the set wind speed of a user.
According to the method, when the environment temperature sensor or the pipe temperature sensor is detected to be in fault, the air conditioner is not controlled to stop running any more, and the air conditioner is controlled to be started and stopped periodically according to the running mode of the air conditioner in fault aiming at the condition that only the environment temperature sensor is in fault; to the condition that only pipe temperature sensor trouble, still judge the refrigeration/demand of heating according to the ambient temperature that ring temperature sensor detected, when satisfying the demand of heating, prevent that the off-premises station from frosting: if heating is needed, the air conditioner is controlled to circularly operate in a heating state and a defrosting state; if refrigeration or dehumidification is needed, the air conditioner is controlled to circularly operate in two states of refrigeration and defrosting, and the evaporator is prevented from frosting while the refrigeration requirement is met. Therefore, compared with the prior art, the air conditioner has the advantages that the air conditioner can continue to realize the basic refrigeration/heating function and the corresponding protection function under the condition that only the environment temperature sensor fails or only the pipe temperature sensor fails, the influence of the temperature sensor on the air conditioner is reduced on the premise that the equipment and the personal safety are guaranteed, the utilization rate of the air conditioner is improved, and the problems in the prior art are solved.
Further, referring to fig. 4, in other embodiments of the present application, while the heating requirements are met through steps S3310 to S3312, the inner fan may be controlled by the following method to realize the cold air prevention function in the heating mode:
s41, starting heating timer tRWhile closing the inner partA fan;
s42, heating timer tRAfter the start, defrost timing tSBefore starting, if the heating timer is long tRIs longer than the preset second heating time tR2And is less than the preset third heating time period tR3If yes, starting the inner fan and controlling the inner fan to operate at a preset low wind speed; if the heating timing duration tRIs longer than the third preset heating time tR3And is less than a preset first heating time period tR1And if yes, controlling the inner fan to operate according to the preset normal wind speed to realize the cold air prevention function. Wherein, 0<tR2’<tR3’<tR1’。
S43, when the defrosting timer t is startedSAnd simultaneously, the inner fan is closed.
In addition, in the heating timing process, if the environment temperature T detected by the environment temperature sensor reaches the refrigerating temperature T set by the userLAnd controlling the compressor to be closed (namely stopping heating), and controlling the inner fan to operate at a low wind speed so as to quickly blow the waste heat of the compressor. In order to control the running time of the inner fan at the moment, the waste heat blowing timing can be started while the inner fan starts to run; and when the timing duration of the waste heat blowing reaches the preset time duration of the waste heat blowing, closing the inner fan. The preset residual heat blowing time can be set according to the practical application condition, and is generally 60 seconds.
Referring to fig. 5, while the heating requirement is satisfied through steps S3310 to S3312, the outer fan may be controlled to prevent the U-tube temperature of the evaporator from being excessively high by:
s51, starting heating timer tRSimultaneously, the outer fan is started and the first timing t for preventing high temperature is startedG1；
S52, heating timer tRAfter the start, defrost timing tSBefore starting, if the temperature is high, the first timing time tG1Reaching the preset high temperature prevention first time tG1', then the outer fan is closed, and the high temperature is prevented for a first timing time tG1Reset and start to resist high temperatureTwo times tG2(ii) a When the second timing duration t is high temperatureG2Reaching the preset high temperature prevention second time tG2When the temperature is high, the outer fan is started, and the second timing duration t of high temperature is preventedG2Reset and restart the first timer t for preventing high temperatureG1Re-executing the step;
first timing t with high temperature preventionG1And starting the second timer t for preventing high temperatureG2Is alternately performed, the external fan is circularly opened and closed (the cycle period is t)G1’+tG2') to realize the high temperature prevention function in the heating mode.
S53, when the defrosting timer t is startedSAnd simultaneously, the outer fan is closed.
Because high temperature prevention is not needed during defrosting, the outer fan can be kept closed.
In addition to all the above embodiments of the control method, when both the ambient temperature sensor and the tube temperature sensor fail, the air conditioner may be controlled by referring to the control method of the third embodiment described above when only the tube temperature sensor fails. That is, after the above embodiment one step S101, after the embodiment two step S2100, and after the embodiment three step S3100, the steps as shown in fig. 6 may be further included:
s600: when the ring temperature sensor and the pipe temperature sensor both have faults, determining a third fault mode; when the third failure mode is the heating mode, executing step S610; when the third failure mode is a cooling mode or a dehumidification mode, executing step S620; when the third failure mode is the air supply mode, executing step S630;
the third failure mode represents an operation mode of the air conditioner including a cooling mode, a dehumidifying mode, a heating mode, and an air supply mode when the failure of the duct temperature sensor is detected.
S610, starting the compressor and the four-way valve (when the third failure mode is the heating mode), and starting the heating timer tRAnd continuing to execute the step S611, otherwise, controlling the air conditioner to stop running;
s611, timing time t during heatingRReaching the preset heating first time tR1When the heating system is started, the four-way valve is closed, and the heating timing time is tRReset and start defrost timing tS；
S612, timing time t when defrostingSReaches the preset defrosting time tSWhen the defrosting time is up, the four-way valve is opened, and the defrosting time is timed for a period tSReset and start heating timer tRAnd returns to step S611;
it should be noted that, in order to ensure the safety of the air conditioner, the preset heating first time period (in the case of a failure of both the ambient temperature sensor and the tube temperature sensor) is shorter than the preset heating first time period in the case of a failure of only the ambient temperature sensor in the third embodiment.
It can be seen from steps S611 and S612 that, when the ambient temperature sensor and the duct temperature sensor fail at the same time, the air conditioner can be controlled to operate in a heating state and a defrosting state according to the corresponding preset time duration (the cycle period is t)R1’+tS') to prevent frosting of an outdoor unit while satisfying a heating demand.
S620, starting the compressor, the inner fan and the outer fan (when the third failure mode is a refrigeration mode or a dehumidification mode), closing the four-way valve, and starting refrigeration for the first time tL1And continuing to execute the step S621, otherwise controlling the air conditioner to stop running;
s621, when the first timing time t of refrigerationL1Reaches a preset first refrigerating time tL1', turning off compressor and external fan, refrigerating for first timing time tL1Reset and start the second timing t of refrigerationL2；
S622, when the air conditioner is cooled, the second timing time tL2Reaches the preset second refrigerating time tL2When the compressor and the external fan are started, the refrigeration is carried out for a second timing duration tL2Reset and restart the first timing t of refrigerationL1And returns to step S621;
it should be noted that, in order to ensure the safety of the air conditioner, the preset first cooling time period (in the case of a failure of both the ambient temperature sensor and the tube temperature sensor) is shorter than the preset first cooling time period in the case of a failure of only the ambient temperature sensor in the third embodiment.
From steps S621 and S622, when the ambient temperature sensor and the tube temperature sensor are failed at the same time, the air conditioner can be controlled according to the corresponding preset time length to control the air conditioner to circularly operate in the cooling state and the defrosting state (the cycle period is t)L1’+tL2') to prevent the evaporator from frosting while meeting the requirements of refrigeration and dehumidification.
S630, and when the third failure mode is an air supply mode, closing the compressor, the outer fan and the four-way valve, and controlling the inner fan to operate according to the set air speed of the user.
Meanwhile, when the heating requirement is met through steps S610 to S612, the external fan can be controlled by the following method to prevent the temperature of the U-tube of the evaporator from being too high:
at the beginning of heating time tRSimultaneously, the outer fan is started and the first timing t for preventing high temperature is startedG1；
At heating time tRAfter the start, defrost timing tSBefore starting, if the temperature is high, the first timing time tG1Reaching the preset high temperature prevention first time tG1', then the outer fan is closed, and the high temperature is prevented for a first timing time tG1Reset and start the second timing t of high temperature preventionG2(ii) a When the second timing duration t is high temperatureG2Reaching the preset high temperature prevention second time tG2When the temperature is high, the outer fan is started, and the second timing duration t of high temperature is preventedG2Reset and restart the first timer t for preventing high temperatureG1Re-executing the step;
at the start of defrost timing tSAnd simultaneously, the outer fan is closed.
Corresponding to the embodiment of the control method, the embodiment of the application also provides an air conditioner which adopts the control method of any one of the embodiments to realize continuous operation when the environment temperature sensor or the pipe temperature sensor is in fault. Specifically, a computer program corresponding to any one of the control methods is stored in a control chip corresponding to the air conditioner, and the execution of the corresponding control method in the air conditioner can be realized by periodically calling the computer program.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the computer program is executed. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of controlling an air conditioner, comprising:
respectively detecting whether the ring temperature sensor and the pipe temperature sensor have faults or not;
if and only if the environment temperature sensor has faults, determining a first fault mode, and periodically starting and stopping the air conditioner; wherein,
the air conditioner runs in the first failure mode after being started;
the first fault mode represents an operation mode of the air conditioner when the fault of the ambient temperature sensor is detected; the first failure mode includes a cooling mode, a dehumidification mode, and a heating mode.
2. The control method according to claim 1, wherein the determining of the first failure mode and the periodic start-stop of the air conditioner, and the air conditioner is operated in the first failure mode after being started comprises:
when the current working mode is determined to be the cooling mode or the dehumidification mode, executing the following steps:
step S211, controlling the air conditioner to operate in a refrigeration mode, and starting refrigeration operation timing;
step S212, when the refrigerating operation timing length reaches a preset refrigerating operation length, controlling the air conditioner to stop operating, clearing the refrigerating operation timing length, and starting refrigerating waiting timing;
step S213, when the refrigeration waiting timing duration reaches a preset refrigeration waiting duration, starting the air conditioner and operating in a refrigeration mode, clearing the refrigeration waiting timing duration, starting refrigeration operation timing, and returning to the step S212;
when the current working mode is determined to be the heating mode, executing the following steps:
step S221, controlling the air conditioner to operate in a heating mode, and starting heating operation timing;
step S222, when the heating operation timing length reaches a preset heating operation time length, controlling the air conditioner to stop operating, clearing the heating operation timing length, and starting heating waiting timing;
step S223, when the heating wait time reaches a preset heating wait time, starting the air conditioner and operating in a heating mode, clearing the heating wait time, starting heating operation time, and returning to the step S222.
3. The control method according to claim 2, wherein the preset cooling operation period is not longer than the preset heating operation period, and the preset cooling waiting period is not shorter than the preset heating waiting period.
4. The control method according to claim 1, characterized in that the method further comprises:
determining a second failure mode if and only if the tube temperature sensor fails; the second fault mode represents an operation mode of the air conditioner when the pipe temperature sensor is detected to be in fault; the second failure mode comprises a cooling mode, a dehumidification mode, a heating mode and an air supply mode;
when the second failure mode is a heating mode, executing the following steps:
step S311, judging whether a heating requirement exists according to the environment temperature detected by the environment temperature sensor and the heating temperature set by a user; if yes, the compressor and the four-way valve are started, heating timing is started, and the step S312 is continuously executed;
step S312, when the heating timing duration reaches a preset heating first duration, closing a four-way valve, clearing the heating timing duration and starting defrosting timing;
step 313, when the defrosting timing duration reaches a preset defrosting duration, a four-way valve is opened, the defrosting timing duration is cleared, the heating timing is started, and the step 312 is returned;
when the second failure mode is a cooling mode or a dehumidification mode, executing the following steps:
step S321, judging whether a refrigeration demand exists according to the environment temperature detected by the environment temperature sensor and the refrigeration temperature set by a user; if so, starting the compressor, the inner fan and the outer fan, closing the four-way valve, starting the first timing of refrigeration, and continuing to execute the step S322;
step S322, when the first refrigeration timing duration reaches a preset first refrigeration duration and the environment temperature is lower than a preset anti-frosting temperature, closing the compressor and the outer fan, resetting the first refrigeration timing duration, and starting second refrigeration timing;
step S323, when the second refrigeration timing length reaches a preset second refrigeration timing length, starting a compressor and an external fan, resetting the second refrigeration timing length, starting the first refrigeration timing, and returning to the step S322;
and when the second failure mode is an air supply mode, closing the compressor, the outer fan and the four-way valve, and controlling the inner fan to operate according to the air speed set by the user.
5. The control method according to claim 4, wherein, simultaneously with the start of the heating timer, the method further comprises turning off an inner fan;
simultaneously with the start of the defrost timing, the method further comprises turning off the inner fan;
after the beginning of the heating timer, the method further comprises:
when the heating timing time length is longer than a preset heating second time length and shorter than a preset heating third time length, starting the inner fan and controlling the inner fan to operate at a preset low wind speed;
and when the heating timing time length is longer than the preset heating third time length and shorter than the preset heating first time length, controlling the inner fan to operate according to a preset normal wind speed.
6. The control method according to claim 4 or 5, characterized in that after the start of the heating timer, the method further comprises:
judging whether the environment temperature detected by the environment temperature sensor reaches the heating temperature set by a user, if so, closing the compressor, controlling the inner fan to operate at a low wind speed, and starting to blow waste heat for timing;
and when the timing duration of the waste heat blowing reaches the preset time duration of the waste heat blowing, closing the inner fan.
7. The control method according to claim 4, wherein simultaneously with the start of the heating timer, the method further comprises turning on an external fan and starting a high temperature prevention first timer;
after the heating timer is started and before the defrosting timer is started, the method further comprises the following steps:
step S51, when the first high temperature prevention timing duration reaches a preset first high temperature prevention timing duration, closing the outer fan, resetting the first high temperature prevention timing duration, and starting second high temperature prevention timing;
step S52, when the second high-temperature-prevention timing duration reaches a preset second high-temperature-prevention timing duration, starting an outer fan, resetting the second high-temperature-prevention timing duration, starting the first high-temperature-prevention timing, and returning to the step S51;
simultaneously with the start of the defrost timing, the method further includes turning off the outer fan.
8. The control method according to claim 1 or 4, characterized in that the method further comprises:
when the environment temperature sensor and the pipe temperature sensor both have faults, determining a third fault mode; the third fault mode represents an operation mode of the air conditioner when the environment temperature sensor and the pipe temperature sensor are detected to be in fault; the third failure mode comprises a cooling mode, a dehumidification mode, a heating mode and an air supply mode;
when the third failure mode is a heating mode, executing the following steps:
step S611, starting a compressor and a four-way valve, starting heating timing, and continuing to execute step S612;
step S612, when the heating timing duration reaches a preset heating first duration, closing a four-way valve, resetting the heating timing duration and starting defrosting timing;
step S613, when the defrosting time-keeping duration reaches the preset defrosting time-keeping duration, starting a four-way valve, clearing the defrosting time-keeping duration, starting the heating time-keeping, and returning to the step S612;
when the third failure mode is a cooling mode or a dehumidification mode, executing the following steps:
step S621, starting the compressor, the inner fan and the outer fan, closing the four-way valve, starting first timing of refrigeration, and continuing to execute step S622;
step S622, when the first refrigeration timing duration reaches a preset first refrigeration duration, closing a compressor and an external fan, resetting the first refrigeration timing duration, and starting second refrigeration timing;
step S623, when the refrigeration second timing duration reaches a preset refrigeration second timing duration, starting a compressor and an external fan, resetting the refrigeration second timing duration, starting the refrigeration first timing, and returning to the step S622;
and when the third failure mode is an air supply mode, closing the compressor, the outer fan and the four-way valve, and controlling the inner fan to operate according to the air speed set by the user.
9. The control method according to claim 8, wherein, simultaneously with the start of the heating timer, the method further comprises turning on an external fan and starting a high temperature prevention first timer;
after the heating timer is started and before the defrosting timer is started, the method further comprises the following steps:
step S71, when the first high temperature prevention timing duration reaches a preset first high temperature prevention timing duration, closing the outer fan, resetting the first high temperature prevention timing duration, and starting second high temperature prevention timing;
step S72, when the second high-temperature-prevention timing duration reaches a preset second high-temperature-prevention timing duration, starting an outer fan, resetting the second high-temperature-prevention timing duration, starting the first high-temperature-prevention timing, and returning to the step S71;
simultaneously with the start of the defrost timing, the method further includes turning off the outer fan.
10. An air conditioner characterized in that the operation thereof is controlled by the control method according to any one of claims 1 to 9.
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