CN115899998A - Control method and device of air conditioner and air conditioner - Google Patents
Control method and device of air conditioner and air conditioner Download PDFInfo
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- 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 embodiment of the invention provides an air conditioner control method and device and an air conditioner. The control method of the air conditioner comprises the following steps: acquiring the exhaust pressure of a first compressor; if the exhaust pressure of the first compressor is greater than or equal to the exhaust pressure threshold of the compressor, increasing the rotating speed of an outdoor fan according to the outdoor environment temperature, the indoor environment temperature and the set temperature; controlling the air conditioner to operate at the increased rotating speed of the outdoor fan for a first time period, and then obtaining the discharge pressure of the second compressor and the temperature change rate of the outer disc; and if the exhaust pressure of the second compressor and the temperature change rate of the outer disc meet the filth blockage condition, judging that the filter screen of the outer machine is filth blocked. The invention solves the technical problem that the accumulated service time of the air conditioner cannot accurately feed back the filth blockage condition of the filter screen.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and device of an air conditioner and the air conditioner.
Background
Because the air often contains suspended solids such as hair, dust, so the chance sets up the filter screen in the air conditioner and filters air impurity, avoids the heat exchanger to be blockked and influences the heat exchange efficiency of heat exchanger. As the service life of the air conditioner is increased, dust can be accumulated on the filter screen, so that the filter screen is dirty and blocked; the air outlet quantity and the heat exchange quantity of the air conditioner can be reduced after the filter screen is dirty and blocked, the air outlet quality of the air conditioner can be reduced, and the use performance of the air conditioner is further influenced.
In the related art, whether the filter screen of the external unit is dirty or not is generally determined according to the accumulated service time of the air conditioner, but the accumulated service time of the air conditioner cannot accurately feed back the dirty condition of the filter screen due to the influence of the service environment of the air conditioner.
Disclosure of Invention
The invention provides a control method of an air conditioner, which aims to solve the problem that accumulated service time of the air conditioner cannot accurately feed back filth blockage of a filter screen. The control method of the air conditioner comprises the following steps: acquiring the exhaust pressure of a first compressor; if the exhaust pressure of the first compressor is greater than or equal to the exhaust pressure threshold of the compressor, increasing the rotating speed of an outdoor fan according to the outdoor environment temperature, the indoor environment temperature and the set temperature; controlling the air conditioner to operate at the increased rotating speed of the outdoor fan for a first time period, and then obtaining the discharge pressure of the second compressor and the temperature change rate of the outer disc; and if the discharge pressure of the second compressor and the temperature change rate of the outer disc meet the filth blockage condition, judging that the filter screen of the outer machine is filth-blocked.
The technical effect achieved after the technical scheme is adopted is as follows: it should be noted that, when the filter screen of the external unit is dirty and blocked, the air output and the heat exchange capacity of the air conditioner are both reduced, which affects the refrigeration effect of the air conditioner. In order to ensure the normal indoor heat exchange process, the compressor can perform frequency raising under the action of the controller, but the heat exchange effect between the outdoor heat exchanger and the outdoor environment is poor due to the filth blockage of the filter screen of the outer machine, so that the exhaust pressure of the compressor is easily increased, and the compressor is shut down under high-pressure protection. If the exhaust pressure of the first compressor is greater than or equal to the exhaust pressure threshold of the compressor, the exhaust pressure of the current compressor is high, and the possibility that the outer machine filter screen is dirty and blocked exists.
In this technical scheme, increase outdoor fan rotational speed according to outdoor ambient temperature, indoor ambient temperature and set for the temperature includes: if Tw is more than or equal to Tw1 and | T is more than or equal to T1 in-T, n = n0 +. DELTA.n; wherein Tw is an outdoor ambient temperature; tw1 is an outdoor ambient temperature threshold; t is set as a set temperature; the temperature in T is the indoor environment temperature; t1 is a temperature difference threshold value; n is the increased rotating speed of the outdoor fan; n0 is the current outdoor fan rotating speed; and Delta n is a rotation speed correction value.
The technical effect achieved after the technical scheme is adopted is as follows: the current environment state of the air conditioner can be known according to the temperature difference between the outdoor environment temperature, the indoor environment temperature and the set temperature by acquiring the outdoor environment temperature, the indoor environment temperature and the set temperature, if Tw is more than or equal to Tw1 and | T is more than or equal to T1 in-T, the current outdoor environment temperature is higher, the indoor heat exchange requirement is larger, and therefore the rotating speed of an outdoor fan is increased to improve the heat exchange effect of the air conditioner.
In the present technical solution, the filth blockage condition includes: the second compressor discharge pressure is greater than or equal to the compressor discharge pressure threshold and the outer disc temperature rate of change is less than an outer disc temperature rate of change threshold.
The technical effect achieved after the technical scheme is adopted is as follows: it can be understood that under the condition that the filter screen of the air conditioner is dirty and blocked, the air quantity of the outdoor fan is attenuated due to the dirty and blocked filter screen of the air conditioner, and the increase of the rotating speed of the outdoor fan is limited for improving the heat exchange effect of an outdoor unit. If the discharge pressure of the second compressor is greater than or equal to the discharge pressure threshold of the compressor and the temperature change rate of the outer disc is smaller than the temperature change rate threshold of the outer disc, it is indicated that the discharge pressure of the compressor is not reduced when the rotating speed of the outdoor fan is increased, and the temperature value of the outer disc is not greatly influenced, so that the filter screen of the outer machine is judged to be dirty and blocked.
In this embodiment, the method for controlling an air conditioner further includes: and if the discharge pressure of the second compressor and the change rate of the temperature of the outer disc do not meet the dirty blocking condition, circularly executing the operation of increasing the rotating speed of the outdoor fan.
The technical effect achieved after the technical scheme is adopted is as follows: if the exhaust pressure of the second compressor and the change rate of the temperature of the outer disc do not meet the filth blockage condition, the improvement of the heat exchange effect of the outdoor unit is limited due to the increase of the rotating speed of the fan, so that the operation of increasing the rotating speed of the outdoor fan is circularly executed, the rotating speed of the outdoor fan is continuously increased, and the wind power and the air volume of the outdoor fan are improved. Compared with the mode that the rotating speed of the outdoor fan is directly and greatly increased, the rotating speed of the outdoor fan is gradually increased, and unnecessary energy consumption and noise of the air conditioner can be avoided.
In this technical solution, the control method of an air conditioner further includes: the rotation speed correction value is positively correlated with the increasing times of the rotation speed of the outdoor fan.
The technical effect achieved after the technical scheme is adopted is as follows: by setting the positive correlation between the rotating speed correction value and the increasing times of the rotating speed of the outdoor fan, the correction value of the rotating speed of the outdoor fan can be increased step by step according to the increasing times of the rotating speed of the outdoor fan, so that the problem that the rotating speed of the outdoor fan is increased slowly due to the fact that the rotating speed of the outdoor fan is increased step by step can be solved.
In this technical solution, the control method of an air conditioner further includes: acquiring the increasing times of the rotating speed of the outdoor fan within a second preset time; and determining whether the filter screen of the external machine is dirty or not according to the increase times.
The technical effect achieved after the technical scheme is adopted is as follows: by acquiring the increasing times of the rotating speed of the outdoor fan within the second preset time, whether the exhaust pressure of the compressor is due to overhigh outdoor environment temperature, high indoor heat exchange requirement or the dirty and blocked outdoor machine filter screen can be accurately judged according to the increasing times of the rotating speed of the fan. It can be understood that if the discharge pressure of the second compressor and the change rate of the temperature of the outer disc do not satisfy the filth blockage condition any more after the rotating speed of the outdoor fan is increased for many times, it indicates that increasing the rotating speed of the outdoor fan can reduce the discharge pressure of the compressor to be less than the discharge pressure threshold of the compressor, that is, the discharge pressure of the compressor is caused by the excessively high outdoor environment temperature and the large indoor heat exchange requirement; if the discharge pressure of the second compressor and the change rate of the temperature of the outer disc still meet the filth blockage condition after the rotating speed of the outdoor fan is increased for multiple times, the discharge pressure of the compressor cannot be reduced to be smaller than the discharge pressure threshold value by increasing the rotating speed of the outdoor fan, namely, the filth blockage of the filter screen of the outer machine occurs.
In the technical scheme, if the increase times are greater than or equal to the increase time threshold, acquiring a real-time running current value of the outdoor fan; and if the real-time running current value of the outdoor fan is smaller than the current reference value of the outdoor fan, judging that the filter screen of the outdoor unit is dirty and blocked.
The technical effect achieved after the technical scheme is adopted is as follows: it can be understood that when the filter screen of the outer unit is dirty and blocked, the outdoor fan is in an overload operation state, and the operation current value of the outdoor fan is lower than the reference current value of the outdoor fan when the filter screen of the outer unit is not dirty and blocked completely. And under the condition that the increasing times are larger than or equal to the increasing time threshold value, the reason that the compressor discharge pressure is larger than or equal to the compressor discharge pressure threshold value can be further verified by acquiring the real-time operation current value of the outdoor fan. If the increasing times of the rotating speed of the fan is larger than or equal to the increasing time threshold value and the real-time running current value of the outdoor fan is smaller than the outdoor fan current reference value, the current outdoor fan is in an overload running state, namely the filter screen of the outdoor unit is dirty and blocked.
The technical solution provides a control device of an air conditioner, which implements any one of the aforementioned control methods of an air conditioner, and the control device of an air conditioner includes: the first acquisition module is used for acquiring the exhaust pressure of the compressor; the control module is used for increasing the rotating speed of the outdoor fan according to the outdoor environment temperature, the indoor environment temperature and the set temperature under the condition that the exhaust pressure of the compressor is greater than or equal to the exhaust pressure threshold of the compressor; the second acquisition module is used for acquiring the exhaust pressure of the second compressor and the change rate of the temperature of the outer disc after controlling the air conditioner to operate for a first time period at the increased rotating speed of the outdoor fan; and the judging module is used for judging that the filter screen of the outer machine is dirty and blocked under the condition that the exhaust pressure of the second compressor and the change rate of the temperature of the outer disc meet the dirty and blocking condition.
The technical effect achieved after the technical scheme is adopted is as follows: the control device in this embodiment can implement the control method of the air conditioner in any embodiment of the present invention, and therefore, the beneficial effects of any embodiment described above are achieved, and are not described herein again.
This technical scheme provides an air conditioner, includes: the air conditioner comprises a processor, a memory and a program or an instruction which is stored on the memory and can run on the processor, wherein when the program or the instruction is executed by the processor, the control method of the air conditioner in any one of the embodiments is realized.
The technical effect achieved after the technical scheme is adopted is as follows: since the air conditioner in this embodiment can execute the method for controlling the air conditioner in any embodiment, the air conditioner in this embodiment can implement the solutions of any embodiment, and the air conditioner in this embodiment has the beneficial effects of any embodiment, which are not described herein again.
The technical scheme provides a readable storage medium, wherein a program or an instruction is stored on the readable storage medium, and the program or the instruction is executed by a processor to realize the control method of the air conditioner in any one of the above embodiments.
The technical effect achieved after the technical scheme is adopted is as follows: the readable storage medium is used for implementing the steps of the control method of the air conditioner according to any embodiment of the present invention, so that the readable storage medium has all the advantages of the method according to any embodiment of the present invention, and further description is omitted here.
In summary, the above embodiments of the present application may have one or more of the following advantages or benefits:
(1) It should be noted that, when the filter screen of the outdoor unit is dirty and blocked, the air output and the heat exchange capacity of the air conditioner are both reduced, which affects the refrigeration effect of the air conditioner. In order to ensure the normal indoor heat exchange process, the compressor can perform frequency raising under the action of the controller, but the heat exchange effect between the outdoor heat exchanger and the outdoor environment is poor due to the filth blockage of the filter screen of the outer machine, so that the exhaust pressure of the compressor is easily increased, and the compressor is shut down under high-pressure protection. If the exhaust pressure of the first compressor is greater than or equal to the exhaust pressure threshold of the compressor, the exhaust pressure of the current compressor is high, and the possibility that the outer machine filter screen is dirty and blocked exists.
(2) By acquiring the increasing times of the rotating speed of the outdoor fan within the second preset time, whether the exhaust pressure of the compressor is due to overhigh outdoor environment temperature, large indoor heat exchange requirement or dirty and blocked filter screen of the outdoor unit can be accurately judged according to the increasing times of the rotating speed of the fan. It can be understood that if the discharge pressure of the second compressor and the change rate of the temperature of the outer disc do not satisfy the filth blockage condition any more after the rotating speed of the outdoor fan is increased for many times, it indicates that increasing the rotating speed of the outdoor fan can reduce the discharge pressure of the compressor to be less than the discharge pressure threshold of the compressor, that is, the discharge pressure of the compressor is caused by the excessively high outdoor environment temperature and the large indoor heat exchange requirement; if the rotating speed of the outdoor fan is increased for multiple times, the discharge pressure of the second compressor and the change rate of the temperature of the outer disc still meet the filth blockage condition, it is indicated that the discharge pressure of the compressor cannot be reduced to be smaller than the discharge pressure threshold value by increasing the rotating speed of the outdoor fan, and thus filth blockage occurs to the filter screen of the outdoor unit.
(3) It can be understood that when the filter screen of the outer unit is dirty and blocked, the outdoor fan is in an overload operation state, and the operation current value of the outdoor fan is lower than the reference current value of the outdoor fan when the filter screen of the outer unit is not dirty and blocked completely. And under the condition that the increasing times are larger than or equal to the increasing times threshold value, the real-time operation current value of the outdoor fan is obtained, so that the reason why the compressor discharge pressure is larger than or equal to the compressor discharge pressure threshold value can be further verified. If the increasing times of the rotating speed of the fan are larger than or equal to the increasing time threshold value and the real-time running current value of the outdoor fan is smaller than the outdoor fan current reference value, the current outdoor fan is in an overload running state, namely the filter screen of the outdoor unit is dirty and blocked.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a control method of an air conditioner according to the present invention.
Fig. 2 is a block diagram of a control device of an air conditioner according to the present invention.
Fig. 3 is a schematic block diagram of an air conditioner according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, it is a schematic flow chart of a control method of an air conditioner according to the present invention. The control method of the air conditioner comprises the following steps: acquiring the exhaust pressure of a first compressor; if the exhaust pressure of the first compressor is greater than or equal to the exhaust pressure threshold of the compressor, increasing the rotating speed of an outdoor fan according to the outdoor environment temperature, the indoor environment temperature and the set temperature; controlling the air conditioner to operate at the increased rotating speed of the outdoor fan for a first time period, and then obtaining the exhaust pressure of the second compressor and the temperature change rate of the outer disc; and if the discharge pressure of the second compressor and the temperature change rate of the outer disc meet the filth blockage condition, judging that the filter screen of the outer machine is filth-blocked.
It should be noted that, when the filter screen of the outdoor unit is dirty and blocked, the air output and the heat exchange capacity of the air conditioner are both reduced, which affects the refrigeration effect of the air conditioner. In order to ensure the normal indoor heat exchange process, the compressor can perform frequency boosting under the action of the controller, but the heat exchange effect between the outdoor heat exchanger and the outdoor environment is poor due to the dirty and blocked filter screen of the outdoor unit, so that the exhaust pressure of the compressor is easily increased, and the compressor is shut down under high-pressure protection. If the exhaust pressure of the first compressor is greater than or equal to the exhaust pressure threshold of the compressor, the exhaust pressure of the current compressor is high, and the possibility that the outer machine filter screen is dirty and blocked exists.
Further, increasing the rotation speed of the outdoor fan according to the outdoor environment temperature, the indoor environment temperature and the set temperature includes: if Tw is more than or equal to Tw1 and | T is more than or equal to T1 in-T, n = n0 +. DELTA.n; wherein Tw is an outdoor ambient temperature; tw1 is an outdoor ambient temperature threshold; t is set as a set temperature; the temperature in T is the indoor environment temperature; t1 is a temperature difference threshold value; n is the increased rotating speed of the outdoor fan; n0 is the current outdoor fan rotating speed; and Delta n is a rotation speed correction value. For example, a preferred value of Tw1 is 28 ℃; preferred values of T1 are 8 ℃; a preferred value for Δ n is 200 revolutions; a preferred value for this first length of time is 20 minutes.
It should be noted that, by acquiring the outdoor environment temperature, the indoor environment temperature and the set temperature, the current environment state of the air conditioner can be known according to the temperature difference between the outdoor environment temperature, the indoor environment temperature and the set temperature, and if Tw is greater than or equal to Tw1 and | T is greater than or equal to T1 within-T, it indicates that the current outdoor environment temperature is relatively high and the indoor heat exchange requirement is relatively large, so that the rotating speed of the outdoor fan is increased to improve the heat exchange effect of the air conditioner.
Further, the filthy condition includes: the second compressor discharge pressure is greater than or equal to the compressor discharge pressure threshold and the outer disc temperature rate of change is less than an outer disc temperature rate of change threshold.
It can be understood that under the condition that the filter screen of the air conditioner is dirty and blocked, the dirty and blocked filter screen of the air conditioner can cause the air quantity attenuation of an outdoor fan, and the increase of the rotating speed of the outdoor fan is limited to improve the heat exchange effect of an outdoor unit. If the discharge pressure of the second compressor is greater than or equal to the discharge pressure threshold of the compressor and the temperature change rate of the outer disc is smaller than the temperature change rate threshold of the outer disc, it is indicated that the discharge pressure of the compressor is not reduced when the rotating speed of the outdoor fan is increased, and the temperature value of the outer disc is not greatly influenced, so that the filter screen of the outer machine is judged to be dirty and blocked.
Further, the control method of the air conditioner further includes: and if the discharge pressure of the second compressor and the change rate of the temperature of the outer disc do not meet the dirty blocking condition, circularly executing the operation of increasing the rotating speed of the outdoor fan.
In one embodiment, if the discharge pressure of the second compressor and the change rate of the temperature of the outer disc do not satisfy the filth blockage condition, it indicates that the increase of the rotating speed of the fan is limited to improve the heat exchange effect of the outdoor unit, so the operation of increasing the rotating speed of the outdoor fan is circularly executed, the rotating speed of the outdoor fan is continuously increased, and the wind power and the air volume of the outdoor fan are improved. Compared with the mode that the rotating speed of the outdoor fan is directly and greatly increased, the rotating speed of the outdoor fan is gradually increased, and unnecessary energy consumption and noise of the air conditioner can be avoided.
Further, the control method of the air conditioner further includes: the rotation speed correction value is positively correlated with the increasing times of the rotation speed of the outdoor fan.
It can be understood that the rotating speed correction value is positively correlated with the increasing times of the rotating speed of the outdoor fan, and the correction value of the rotating speed of the outdoor fan can be increased step by step according to the increasing times of the rotating speed of the outdoor fan, so that the problem that the rotating speed of the outdoor fan is increased slowly due to the fact that the rotating speed of the outdoor fan is increased step by step can be solved.
Further, the control method of the air conditioner further includes: acquiring the increasing times of the rotating speed of the outdoor fan within a second preset time; and determining whether the filter screen of the external unit is filthy-blocked or not according to the increasing times.
It can be understood that the number of times of increasing the rotating speed of the outdoor fan within the second preset time can be obtained, and whether the exhaust pressure of the compressor is caused by overhigh outdoor environment temperature, large indoor heat exchange requirement or dirty and blocked outer machine filter screen can be accurately judged according to the number of times of increasing the rotating speed of the fan. It can be understood that if the discharge pressure of the second compressor and the change rate of the temperature of the outer disc do not satisfy the filth blockage condition any more after the rotating speed of the outdoor fan is increased for many times, it indicates that increasing the rotating speed of the outdoor fan can reduce the discharge pressure of the compressor to be less than the discharge pressure threshold of the compressor, that is, the discharge pressure of the compressor is caused by the excessively high outdoor environment temperature and the large indoor heat exchange requirement; if the discharge pressure of the second compressor and the change rate of the temperature of the outer disc still meet the filth blockage condition after the rotating speed of the outdoor fan is increased for multiple times, the discharge pressure of the compressor cannot be reduced to be smaller than the discharge pressure threshold value by increasing the rotating speed of the outdoor fan, namely, the filth blockage of the filter screen of the outer machine occurs.
Further, if the increasing times are larger than or equal to the increasing times threshold value, acquiring a real-time running current value of the outdoor fan; and if the real-time running current value of the outdoor fan is smaller than the current reference value of the outdoor fan, judging that the filter screen of the outdoor unit is dirty and blocked. For example, the preferred value of the increase number threshold is 3; a preferred value of the second preset duration is one hour.
It can be understood that when the filter screen of the outer unit is dirty and blocked, the outdoor fan is in an overload operation state, and the operation current value of the outdoor fan is lower than the reference current value of the outdoor fan when the filter screen of the outer unit is not dirty and blocked completely. And under the condition that the increasing times are larger than or equal to the increasing time threshold value, the reason that the compressor discharge pressure is larger than or equal to the compressor discharge pressure threshold value can be further verified by acquiring the real-time operation current value of the outdoor fan. If the increasing times of the rotating speed of the fan is larger than or equal to the increasing time threshold value and the real-time running current value of the outdoor fan is smaller than the outdoor fan current reference value, the current outdoor fan is in an overload running state, namely the filter screen of the outdoor unit is dirty and blocked.
Further, referring to fig. 2, the present invention provides a control device of an air conditioner, which implements the control method of the air conditioner according to any one of the above, and the control device 100 of the air conditioner includes: a first acquisition module 110, a control module 120, a second acquisition module 130, and a decision module 140. The first obtaining module 110 is configured to obtain a compressor discharge pressure; the control module 120 is configured to increase the rotation speed of the outdoor fan according to the outdoor environment temperature, the indoor environment temperature, and the set temperature when the discharge pressure of the compressor is greater than or equal to the discharge pressure threshold of the compressor; the second obtaining module 130 is configured to obtain a discharge pressure of the second compressor and a temperature change rate of the outer disc after controlling the air conditioner to operate at the increased rotational speed of the outdoor fan for a first duration; the determination module 140 is configured to determine that the outer machine filter screen is dirty and blocked when the discharge pressure of the second compressor and the change rate of the outer disc temperature satisfy a dirty and blocked condition.
In one embodiment: the first obtaining module 110, the control module 120, the second obtaining module 130, and the determining module 140 cooperate to implement any one of the aforementioned control methods of the air conditioner, and can achieve the same effect, which is not described herein again.
Further, referring to fig. 3, the present invention provides an air conditioner. The air conditioner 200 includes: the processor 210, the memory 220 and the program or the instructions stored on the memory 220 and capable of running on the processor 210, wherein the program or the instructions when executed by the processor 210 implement any one of the control methods of the air conditioner as described above. The air conditioner may be a wall-mounted air conditioner, a cabinet air conditioner, a central air conditioner, etc.
Further, the present embodiment provides a readable storage medium on which a program or instructions are stored, the program or instructions, when executed by a processor, implementing the steps of the control method of the air conditioner as in any one of the above embodiments.
The readable storage medium may be any combination of one or more readable media, which may be a readable signal medium or a readable storage medium, and may include, for example but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of the readable storage medium include: an electrical connection having one or more wires, a portable diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A control method of an air conditioner, characterized by comprising:
acquiring the exhaust pressure of a first compressor;
if the exhaust pressure of the first compressor is greater than or equal to the exhaust pressure threshold of the compressor, increasing the rotating speed of an outdoor fan according to the outdoor environment temperature, the indoor environment temperature and the set temperature;
controlling the air conditioner to operate at the increased rotating speed of the outdoor fan for a first time period, and then obtaining the exhaust pressure of the second compressor and the temperature change rate of the outer disc;
and if the exhaust pressure of the second compressor and the temperature change rate of the outer disc meet the filth blockage condition, judging that the filter screen of the outer machine is filth blocked.
2. The control method of an air conditioner according to claim 1, wherein said increasing the outdoor fan rotation speed according to the outdoor ambient temperature, the indoor ambient temperature, and the set temperature comprises:
if Tw is more than or equal to Tw1 and | T is more than or equal to T1 in-T, n = n0 +. DELTA.n;
wherein Tw is an outdoor ambient temperature; tw1 is an outdoor ambient temperature threshold; t is set as a set temperature; the temperature of the indoor environment is T; t1 is a temperature difference threshold value; n is the increased rotating speed of the outdoor fan; n0 is the current outdoor fan rotating speed; and Delta n is a rotation speed correction value.
3. The control method of an air conditioner according to claim 2, wherein the filth blockage condition includes:
the second compressor discharge pressure is greater than or equal to the compressor discharge pressure threshold and the outer disc temperature rate of change is less than an outer disc temperature rate of change threshold.
4. The control method of an air conditioner according to claim 2, further comprising:
and if the discharge pressure of the second compressor and the change rate of the temperature of the outer disc do not meet the dirty blocking condition, circularly executing the operation of increasing the rotating speed of the outdoor fan.
5. The control method of an air conditioner according to claim 4, further comprising:
the rotation speed correction value is positively correlated with the increasing times of the rotation speed of the outdoor fan.
6. The control method of an air conditioner according to claim 4, further comprising:
acquiring the increasing times of the rotating speed of the outdoor fan within a second preset time;
and determining whether the filter screen of the external machine is dirty or not according to the increase times.
7. The control method of an air conditioner according to claim 5,
if the increasing times are larger than or equal to the increasing times threshold value, acquiring a real-time running current value of the outdoor fan; and if the real-time running current value of the outdoor fan is smaller than the current reference value of the outdoor fan, judging that the filter screen of the outdoor unit is dirty and blocked.
8. A control device of an air conditioner, characterized in that the control device of the air conditioner implements the control method of the air conditioner according to any one of claims 1 to 7, the control device of the air conditioner comprising:
the first acquisition module is used for acquiring the exhaust pressure of the compressor;
the control module is used for increasing the rotating speed of the outdoor fan according to the outdoor environment temperature, the indoor environment temperature and the set temperature under the condition that the exhaust pressure of the compressor is greater than or equal to the exhaust pressure threshold of the compressor;
the second acquisition module is used for acquiring the exhaust pressure of a second compressor and the change rate of the temperature of the outer disc after controlling the air conditioner to operate at the increased rotating speed of the outdoor fan for a first time period;
and the judging module is used for judging that the filter screen of the outer machine is dirty and blocked under the condition that the exhaust pressure of the second compressor and the change rate of the temperature of the outer disc meet the dirty and blocking condition.
9. An air conditioner, characterized in that the air conditioner comprises:
a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the control method of the air conditioner as claimed in any one of claims 1 to 7.
10. A readable storage medium, characterized in that the readable storage medium stores thereon a program or instructions which, when executed by a processor, implements the control method of an air conditioner according to any one of claims 1 to 7.
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