CN115978732A - Control method and device of air conditioner, air conditioner and storage medium - Google Patents
Control method and device of air conditioner, air conditioner and storage medium Download PDFInfo
- Publication number
- CN115978732A CN115978732A CN202211640046.0A CN202211640046A CN115978732A CN 115978732 A CN115978732 A CN 115978732A CN 202211640046 A CN202211640046 A CN 202211640046A CN 115978732 A CN115978732 A CN 115978732A
- Authority
- CN
- China
- Prior art keywords
- air conditioner
- temperature
- indoor
- frequency
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 91
- 238000005265 energy consumption Methods 0.000 claims abstract description 30
- 239000003507 refrigerant Substances 0.000 claims description 25
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 41
- 238000010438 heat treatment Methods 0.000 description 40
- 230000009467 reduction Effects 0.000 description 31
- 238000001816 cooling Methods 0.000 description 16
- 238000005057 refrigeration Methods 0.000 description 10
- 230000002035 prolonged effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method and a control device of an air conditioner, the air conditioner and a storage medium, wherein the method comprises the following steps: under the condition that the air conditioner runs after being started, the on-off of the switch unit is controlled, so that the actual heat exchange area of the indoor heat exchanger is the set maximum heat exchange area; acquiring the indoor environment temperature of the air conditioner, and acquiring the target temperature of the air conditioner; and controlling at least one of the operating frequency of the compressor, the rotating speed of the indoor fan, the rotating speed of the outdoor fan and the switching on and off of the switch unit again according to the indoor environment temperature of the air conditioner and the target temperature of the air conditioner, so that the air conditioner can be maintained in an operating state under the set energy consumption under the condition that the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner. This scheme is through making the air conditioner with low energy consumption state operation after satisfying the user's demand, avoids the compressor to open and shut repeatedly and leads to the indoor temperature undulant great, is favorable to promoting user's comfortable nature experience and prolongs the life of air conditioner.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a control method and device of an air conditioner, the air conditioner and a storage medium.
Background
In a related scheme, in order to meet the refrigerating (or heating) effect, the air conditioner quickly reduces (or raises) the room temperature by increasing the operating frequency of the compressor at the initial stage of starting operation, and during stable operation, the operating frequency of the compressor is adjusted according to the difference between the current indoor environment temperature and the set temperature, and when the indoor temperature reaches the set temperature and the operating frequency of the compressor reaches the lowest frequency, the compressor is stopped until the indoor environment temperature is increased (or reduced), and the compressor is restarted for operation. In the process of starting and stopping the compressor, the fluctuation of the indoor environment temperature is large, the comfort experience of a user is influenced, and meanwhile, the service life of the air conditioner is also influenced by frequent starting and stopping.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention aims to provide a control method and a control device of an air conditioner, the air conditioner and a storage medium, and aims to solve the problems that in the running process of the air conditioner, the running frequency of a compressor is adjusted according to the difference between the current indoor environment temperature and the set temperature, when the indoor temperature reaches the set temperature and the running frequency of the compressor reaches the lowest frequency, the compressor is stopped, the compressor is restarted to run until the indoor environment temperature rises (or falls), the repeated start and stop of the compressor causes large fluctuation of the indoor temperature, the comfort experience of a user is influenced, and the service life of the air conditioner is also influenced.
The invention provides a control method of an air conditioner, wherein the air conditioner comprises the following steps: the heat exchanger comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein an indoor fan is arranged at the indoor heat exchanger, and an outdoor fan is arranged at the outdoor heat exchanger; a switch unit is arranged on a refrigerant heat exchange pipeline of the indoor heat exchanger, and the actual heat exchange area of the indoor heat exchanger can be adjusted through the on-off of the switch unit; the control method of the air conditioner comprises the following steps: under the condition that the air conditioner runs after being started, controlling the on-off of the switch unit so as to enable the actual heat exchange area of the indoor heat exchanger to be the set maximum heat exchange area; acquiring the indoor environment temperature of the air conditioner, and acquiring the target temperature of the air conditioner; and controlling at least one of the operation frequency of the compressor, the rotating speed of the indoor fan, the rotating speed of the outdoor fan and the switching on and off of the switch unit according to the indoor environment temperature of the air conditioner and the target temperature of the air conditioner, so that the air conditioner can maintain the operation state under the set energy consumption when the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner.
In some embodiments, the number of the indoor heat exchangers is two or more; two or more indoor heat exchangers include: a first heat exchanger and a second heat exchanger; the switching unit includes: a first two-way valve and a second two-way valve; the first heat exchanger and the second heat exchanger are arranged in series, the first two-way valve is arranged in a pipeline between the first heat exchanger and the second heat exchanger, and the second two-way valve is arranged between a common end between the first heat exchanger and the first two-way valve and one end of the second heat exchanger far away from the first two-way valve; under the condition that the air conditioner runs after being started, the on-off of the switch unit is controlled, and the method comprises the following steps: under the condition that the air conditioner runs after being started, controlling the first two-way valve to be opened and controlling the second two-way valve to be closed; and at the moment, the actual heat exchange area of the indoor heat exchanger is the sum of the heat exchange area of the first heat exchanger and the heat exchange area of the second heat exchanger.
In some embodiments, the indoor ambient temperature of the air conditioner obtained when the indoor heat exchanger operates in a set maximum heat exchange area is recorded as a first indoor ambient temperature of the air conditioner; controlling at least one of an operation frequency of the compressor, a rotation speed of the indoor fan, a rotation speed of the outdoor fan, and re-on/off of the switching unit according to an indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, including: determining an absolute value of a temperature difference value between a first indoor environment temperature of the air conditioner and a target temperature of the air conditioner, and recording the absolute value as a first temperature difference absolute value; determining whether the first absolute value of the temperature difference is less than or equal to a first preset temperature; recording the current running frequency of the compressor as a first frequency; if the absolute value of the first temperature difference is determined to be smaller than or equal to a first preset temperature, controlling the running frequency of the compressor to be reduced from the first frequency to a set frequency to obtain a second frequency; and controlling the compressor to operate at the second frequency for a set time.
In some embodiments, the indoor ambient temperature of the air conditioner obtained after the compressor is operated at the second frequency for a set time is recorded as a second indoor ambient temperature of the air conditioner; controlling at least one of an operation frequency of the compressor, a rotation speed of the indoor fan, a rotation speed of the outdoor fan, and re-on/off of the switching unit according to an indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, further comprising: determining whether a second indoor ambient temperature of the air conditioner does not reach a target temperature of the air conditioner after controlling the compressor to operate at the second frequency for a set time; if the second indoor environment temperature of the air conditioner is determined not to reach the target temperature of the air conditioner, controlling the running frequency of the compressor to recover from the second frequency to the first frequency, and controlling the compressor to run according to the first frequency; if the second indoor environment temperature of the air conditioner is determined to reach the target temperature of the air conditioner, determining an absolute value of a temperature difference value between the second indoor environment temperature of the air conditioner and the target temperature of the air conditioner, and recording the absolute value as a second temperature difference absolute value; determining whether the second absolute value of the temperature difference is less than or equal to a second preset temperature; if the second temperature difference absolute value is larger than a second preset temperature, controlling the compressor to operate according to the second frequency; if the second temperature difference absolute value is determined to be smaller than or equal to a second preset temperature, controlling the running frequency of the compressor to be reduced from the second frequency to a set frequency to obtain a third frequency; and controlling the compressor to operate for a set time according to the third frequency.
In some embodiments, the indoor ambient temperature of the air conditioner, which is obtained after the compressor is operated at the third frequency for a set time, is recorded as a third indoor ambient temperature of the air conditioner; controlling at least one of an operation frequency of the compressor, a rotation speed of the indoor fan, a rotation speed of the outdoor fan, and re-on/off of the switching unit according to an indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, and further comprising: after controlling the compressor to operate for a set time according to the third frequency, determining an absolute value of a temperature difference value between the ambient temperature in the third room of the air conditioner and the target temperature of the air conditioner, and recording the absolute value as a third temperature difference absolute value; determining whether the third absolute value of the temperature difference is less than or equal to a third preset temperature; if the third temperature difference absolute value is larger than a third preset temperature, controlling the compressor to operate according to the third frequency; and if the third absolute temperature difference value is determined to be less than or equal to a third preset temperature, reducing the rotating speed of at least one of the indoor fan and the outdoor fan, and controlling the fan to operate for a set time according to the reduced rotating speed.
In some embodiments, the indoor environment temperature of the air conditioner obtained after the rotating speed of at least one of the indoor fan and the outdoor fan is reduced and the fan is controlled to operate at the reduced rotating speed for a set time is recorded as a fourth indoor environment temperature of the air conditioner; controlling at least one of an operation frequency of the compressor, a rotation speed of the indoor fan, a rotation speed of the outdoor fan, and re-on/off of the switching unit according to an indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, further comprising: after reducing the rotating speed of at least one of the indoor fan and the outdoor fan and controlling the fan to operate for a set time according to the reduced rotating speed, determining whether the fourth indoor environment temperature of the air conditioner exceeds the target temperature of the air conditioner; if the fourth indoor environment temperature of the air conditioner is determined not to exceed the target temperature of the air conditioner, controlling the air conditioner to maintain the current operation mode; if the fourth indoor environment temperature of the air conditioner is determined to exceed the target temperature of the air conditioner, the on-off of the switch unit is controlled again, so that the actual heat exchange area of the indoor heat exchanger is reduced; wherein, the switching-on and switching-off of the switch unit is controlled again to make the actual heat exchange area of the indoor heat exchanger reduce, including: and under the condition that the indoor heat exchanger comprises a first heat exchanger and a second heat exchanger and the switch unit comprises a first two-way valve and a second two-way valve, controlling the first two-way valve to be closed and controlling the second two-way valve to be opened.
In accordance with the above method, another aspect of the present invention provides a control apparatus for an air conditioner, the air conditioner including: the heat exchanger comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein an indoor fan is arranged at the indoor heat exchanger, and an outdoor fan is arranged at the outdoor heat exchanger; a switching unit is arranged on a refrigerant heat exchange pipeline of the indoor heat exchanger, and the actual heat exchange area of the indoor heat exchanger can be adjusted through the on-off of the switching unit; the control device of the air conditioner comprises: the control unit is configured to control the on-off of the switch unit under the condition that the air conditioner runs after being started, so that the actual heat exchange area of the indoor heat exchanger is the set maximum heat exchange area; an acquisition unit configured to acquire an indoor ambient temperature of the air conditioner and acquire a target temperature of the air conditioner; the control unit is further configured to control at least one of an operation frequency of the compressor, a rotation speed of the indoor fan, a rotation speed of the outdoor fan, and re-on/off of the switching unit according to an indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, so that the air conditioner maintains an operation state at a set energy consumption in a case where the indoor ambient temperature of the air conditioner reaches the target temperature of the air conditioner.
In some embodiments, the number of the indoor heat exchangers is two or more; two or more indoor heat exchangers include: a first heat exchanger and a second heat exchanger; the switching unit includes: a first two-way valve and a second two-way valve; the first heat exchanger and the second heat exchanger are arranged in series, the first two-way valve is arranged in a pipeline between the first heat exchanger and the second heat exchanger, and the second two-way valve is arranged between a common end between the first heat exchanger and the first two-way valve and one end of the second heat exchanger far away from the first two-way valve; the control unit controls the on-off of the switch unit under the condition that the air conditioner runs after being started, and comprises the following components: under the condition that the air conditioner runs after being started, controlling the first two-way valve to be opened and controlling the second two-way valve to be closed; and at the moment, the actual heat exchange area of the indoor heat exchanger is the sum of the heat exchange area of the first heat exchanger and the heat exchange area of the second heat exchanger.
In some embodiments, the control unit is further configured to record an indoor ambient temperature of the air conditioner obtained when the indoor heat exchanger operates in a set maximum heat exchange area as a first indoor ambient temperature of the air conditioner; the control unit controls at least one of the operation frequency of the compressor, the rotation speed of the indoor fan, the rotation speed of the outdoor fan, and the re-on/off of the switch unit according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, and includes: determining an absolute value of a temperature difference value between a first indoor environment temperature of the air conditioner and a target temperature of the air conditioner, and recording the absolute value as a first temperature difference absolute value; determining whether the first absolute value of the temperature difference is less than or equal to a first preset temperature; recording the current running frequency of the compressor as a first frequency; if the absolute value of the first temperature difference is determined to be smaller than or equal to a first preset temperature, controlling the running frequency of the compressor to be reduced from the first frequency to a set frequency to obtain a second frequency; and controlling the compressor to operate at the second frequency for a set time.
In some embodiments, the control unit is further configured to record an indoor ambient temperature of the air conditioner, which is obtained after the compressor is operated at the second frequency for a set time, as a second indoor ambient temperature of the air conditioner; the control unit controls at least one of the operating frequency of the compressor, the rotational speed of the indoor fan, the rotational speed of the outdoor fan, and the re-on/off of the switching unit according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, and further includes: determining whether a second indoor ambient temperature of the air conditioner does not reach a target temperature of the air conditioner after controlling the compressor to operate at the second frequency for a set time; if the second indoor environment temperature of the air conditioner is determined not to reach the target temperature of the air conditioner, controlling the running frequency of the compressor to recover from the second frequency to the first frequency, and controlling the compressor to run according to the first frequency; if the second indoor environment temperature of the air conditioner is determined to reach the target temperature of the air conditioner, determining an absolute value of a temperature difference value between the second indoor environment temperature of the air conditioner and the target temperature of the air conditioner, and recording the absolute value as a second temperature difference absolute value; determining whether the second absolute value of the temperature difference is less than or equal to a second preset temperature; if the second absolute temperature difference value is larger than a second preset temperature, controlling the compressor to operate at the second frequency; if the second temperature difference absolute value is determined to be smaller than or equal to a second preset temperature, controlling the running frequency of the compressor to be reduced from the second frequency to a set frequency to obtain a third frequency; and controlling the compressor to operate for a set time according to the third frequency.
In some embodiments, the control unit is further configured to record an indoor ambient temperature of the air conditioner, which is obtained after the compressor is operated at the third frequency for a set time, as a third indoor ambient temperature of the air conditioner; the control unit controls at least one of the operation frequency of the compressor, the rotation speed of the indoor fan, the rotation speed of the outdoor fan and the re-on/off of the switch unit according to the indoor environment temperature of the air conditioner and the target temperature of the air conditioner, and further includes: after controlling the compressor to operate for a set time according to the third frequency, determining an absolute value of a temperature difference value between the ambient temperature in the third chamber of the air conditioner and the target temperature of the air conditioner, and recording the absolute value as a third temperature difference absolute value; determining whether the third absolute temperature difference is less than or equal to a third preset temperature; if the third temperature difference absolute value is larger than a third preset temperature, controlling the compressor to operate according to the third frequency; and if the third absolute temperature difference value is smaller than or equal to a third preset temperature, reducing the rotating speed of at least one of the indoor fan and the outdoor fan, and controlling the fan to operate for a set time according to the reduced rotating speed.
In some embodiments, the control unit is further configured to record an indoor ambient temperature of the air conditioner, which is obtained after reducing a rotation speed of at least one of the indoor fan and the outdoor fan and controlling the fan to operate at the reduced rotation speed for a set time, as a fourth indoor ambient temperature of the air conditioner; the control unit controls at least one of the operation frequency of the compressor, the rotation speed of the indoor fan, the rotation speed of the outdoor fan and the re-on/off of the switch unit according to the indoor environment temperature of the air conditioner and the target temperature of the air conditioner, and further includes: after reducing the rotating speed of at least one of the indoor fan and the outdoor fan and controlling the fan to operate for a set time according to the reduced rotating speed, determining whether the fourth indoor environment temperature of the air conditioner exceeds the target temperature of the air conditioner; if the fourth indoor environment temperature of the air conditioner is determined not to exceed the target temperature of the air conditioner, controlling the air conditioner to maintain the current operation mode; if the fourth indoor environment temperature of the air conditioner is determined to exceed the target temperature of the air conditioner, the on-off of the switch unit is controlled again, so that the actual heat exchange area of the indoor heat exchanger is reduced; wherein, the control unit controls the on-off of switch unit again to make the actual heat transfer area of indoor heat exchanger reduces, includes: and under the condition that the indoor heat exchanger comprises a first heat exchanger and a second heat exchanger and the switch unit comprises a first two-way valve and a second two-way valve, controlling the first two-way valve to be closed and controlling the second two-way valve to be opened.
In accordance with another aspect of the present invention, there is provided an air conditioner including: the control device of the air conditioner is described above.
In line with the above method, a further aspect of the present invention provides a storage medium, the storage medium including a stored program, wherein when the program is run, an apparatus in which the storage medium is located is controlled to execute the above control method of an air conditioner.
Therefore, according to the scheme of the invention, more than two indoor heat exchangers are arranged in the air conditioner, and the switching units (such as two-way valves) are arranged on the refrigerant heat exchange pipelines of the more than two indoor heat exchangers, so that the actual heat exchanger areas of the more than two indoor heat exchangers can be adjusted through the on-off of the switching units; in the operation process of the air conditioner, the operation frequency of the compressor, the rotating speed of the indoor and outdoor fans and the on-off of the switch unit are controlled according to the difference value between the indoor environment temperature and the user set temperature, so that the air conditioner can respond in advance when the room temperature (namely the indoor environment temperature) is close to the user set temperature, the air conditioner is prevented from being operated at a high frequency for a long time to quickly reach the set temperature, and the air conditioner is prevented from being frequently started and stopped, therefore, the air conditioner is operated in a low-energy consumption state after meeting the user requirements, the phenomenon that the compressor is repeatedly started and stopped to cause large indoor temperature fluctuation is avoided, the improvement of the comfort experience of a user is facilitated, and the service life of the air conditioner is prolonged.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating an embodiment of controlling the operating frequency of the compressor in the case that the indoor heat exchanger operates with a set maximum heat exchange area in the method of the present invention;
FIG. 3 is a schematic flow chart illustrating an embodiment of the method of the present invention for continuing to control the operating frequency of the compressor after the compressor has been operated at the second frequency for a set time;
FIG. 4 is a flowchart illustrating an embodiment of controlling the rotational speed of the indoor and outdoor fans after the compressor is operated for a set time at the third frequency according to the method of the present invention;
FIG. 5 is a schematic flow chart illustrating an embodiment of controlling the on/off of the switch unit again after the compressor operates at the third frequency for a predetermined time according to the method of the present invention;
FIG. 6 is a schematic diagram of a control device of an air conditioner according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of an embodiment of an air conditioner according to the present invention;
fig. 8 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
The reference numbers in the embodiments of the invention are as follows, in combination with the drawings:
102-an obtaining unit; 104-control unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
The air conditioner has the advantages that in the running process of the air conditioner, the running frequency of the compressor is adjusted according to the difference between the current indoor environment temperature and the set temperature, the compressor is stopped when the indoor temperature reaches the set temperature and the running frequency of the compressor reaches the lowest frequency, the compressor is restarted to run until the indoor environment temperature rises (or falls), and the repeated starting and stopping of the compressor causes large fluctuation of the indoor temperature, so that the comfort experience of a user is influenced, and the service life of the air conditioner is also influenced. For example: for the air conditioner, when the indoor environment temperature is 1-2 ℃ lower than the set temperature (the heating means that the environment temperature is 1-2 ℃ higher than the set temperature), and the heating lasts for a period of time, the compressor of the air conditioner stops working; after the compressor of the air conditioner stops running, the indoor environment temperature starts to rise (heating is reduced), when the indoor environment temperature is detected to be higher than the set temperature, the compressor of the air conditioner is restarted, however, because the compressor of the air conditioner is just stopped for a long time, the internal pressure of the system is not balanced, in order to ensure the reliability of the air conditioner, the compressor cannot be started at the first time after the temperature rises, and the compressor can start to work after waiting for a period of time. And the compressor needs to be operated for a period of time after being started to reduce the indoor ambient temperature again. Therefore, during the repeated start-up and shut-down of the compressor, the indoor temperature fluctuates greatly.
Therefore, the scheme of the invention provides the control method of the air conditioner, so that the cold (heat) output of the air conditioner can be maintained at a balanced position with the room load after the air conditioner runs for a long time, the influence on the comfort experience of a user and the service life of the air conditioner due to frequent startup and shutdown is avoided, the comfort experience of the user is favorably improved, and the service life of the air conditioner is prolonged.
According to an embodiment of the present invention, a method for controlling an air conditioner is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The air conditioner includes: the heat exchanger comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein an indoor fan is arranged at the indoor heat exchanger, and an outdoor fan is arranged at the outdoor heat exchanger. A switch unit is arranged on a refrigerant heat exchange pipeline of the indoor heat exchanger, and the actual heat exchange area of the indoor heat exchanger can be adjusted by switching on and off the switch unit. The control method of the air conditioner comprises the following steps: step S110 to step S130.
In step S110, when the air conditioner is operated after being turned on, the on/off of the switch unit is controlled so that the actual heat exchange area of the indoor heat exchanger is the set maximum heat exchange area.
At step S120, an indoor ambient temperature of the air conditioner is obtained, and a target temperature of the air conditioner, such as a user-set temperature t, is obtained Is provided with 。
At step S130, at least one of the operation frequency of the compressor, the rotation speed of the indoor fan, the rotation speed of the outdoor fan, and the re-on/off of the switching unit is controlled according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, so that the air conditioner maintains an operation state at a set power consumption in a case where the indoor ambient temperature of the air conditioner reaches the target temperature of the air conditioner.
According to the control method of the air conditioner, in the operation process of the air conditioner, the detection of the current indoor environment temperature of the air conditioner is continuous, when the difference value between the current indoor environment temperature of the air conditioner and the temperature set by a user meets the judgment condition, the air conditioner keeps operating in the current state, and when the difference value between the indoor environment temperature and the temperature set by the user changes, the judgment needs to be carried out again. Referring to the example shown in fig. 7, the indoor environment temperature (e.g., the current indoor environment temperature t) is detected during the operation of the air conditioner 0 Current indoor ambient temperature t 1 Current indoor ambient temperature t 2 Etc.) and a user-set temperature (e.g., user-set temperature t) Is provided with ) Difference of (2)The running frequency of the compressor in the air conditioner, the rotating speed of the indoor and outdoor fans and the on-off of the electromagnetic two-way valve (namely the two-way valve 1 and the two-way valve 2) are controlled, so that the air conditioner can respond in advance when the room temperature (namely the indoor environment temperature) is close to the set temperature of a user, the air conditioner is prevented from running at a higher frequency for a long time, the room temperature is caused to reach the set temperature quickly, the air conditioner is enabled to be started and stopped frequently, the indoor temperature is caused to fluctuate, and the comfort experience of the user is influenced.
In some embodiments, the number of the indoor heat exchangers is two or more. Two or more indoor heat exchangers include: a first heat exchanger such as an indoor heat exchanger 1 and a second heat exchanger such as an indoor heat exchanger 2. The switching unit includes: a first two-way valve, such as two-way valve 1, and a second two-way valve, such as two-way valve 2. The first heat exchanger and the second heat exchanger are arranged in series, the first two-way valve is arranged in a pipeline between the first heat exchanger and the second heat exchanger, and the second two-way valve is arranged between a common end between the first heat exchanger and the first two-way valve and one end, far away from the first two-way valve, of the second heat exchanger.
Under the condition that the air conditioner runs after being started, the on-off of the switch unit is controlled, and the method comprises the following steps: and under the condition that the air conditioner runs after being started, controlling the first two-way valve to be opened and controlling the second two-way valve to be closed. And at the moment, the actual heat exchange area of the indoor heat exchanger is the sum of the heat exchange area of the first heat exchanger and the heat exchange area of the second heat exchanger.
Specifically, fig. 7 is a schematic structural diagram of an embodiment of an air conditioner according to the present invention. As shown in fig. 7, an air conditioner according to an aspect of the present invention includes: the system comprises a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger 1, an indoor heat exchanger 2, a two-way valve 1, a two-way valve 2 and a throttling device. The exhaust port of the compressor is communicated to the first valve port of the four-way valve. The second port of the four-way valve is communicated to the first end of the outdoor heat exchanger on one hand and the first end of the indoor heat exchanger 1 on the other hand. The second end of the outdoor heat exchanger is communicated to the fourth valve port of the four-way valve on the one hand, and is communicated to the second end of the indoor heat exchanger 2 through the throttling device on the other hand. And a second end of the indoor heat exchanger 1 is communicated to a first end of the indoor heat exchanger 2 through the two-way valve 1. And the second end of the indoor heat exchanger 1 is also communicated to the second end of the indoor heat exchanger 2 through the two-way valve 2. The third valve port of the four-way valve is communicated to the air suction port of the compressor after passing through the gas-liquid separator.
Referring to the example shown in fig. 7, two-way valves (i.e., two-way valve 1 and two-way valve 2) are operated in cooperation, and the two-way valves (i.e., two-way valve 1 and two-way valve 2) are used for controlling the on/off of corresponding refrigerant pipelines in the system in which the air conditioner is located. Specifically, when both the indoor heat exchanger 1 and the indoor heat exchanger 2 of the air conditioner need to be put into use, the two-way valve 1 is opened, and the two-way valve 2 is closed, so that the refrigerant in the corresponding refrigerant pipeline in the system where the air conditioner is located can flow through the indoor heat exchanger 1 and the indoor heat exchanger 2. When only one indoor heat exchanger is needed, the two-way valve 1 is closed, and the two-way valve 2 is opened, so that the refrigerant in the corresponding refrigerant pipeline in the system where the air conditioner is located only flows through the indoor heat exchanger 1.
In the scheme of the invention, a two-way valve (such as the two-way valve 1) is arranged between two adjacent heat exchangers in more than two indoor heat exchangers (such as the indoor heat exchanger 1 and the indoor heat exchanger 2), another two-way valve (such as the two-way valve 2) is connected in parallel on a serial pipeline of the two-way valve (such as the two-way valve 1) and the indoor heat exchanger, after the air conditioner operates for a period of time, a difference value between the indoor ambient temperature and the set temperature of a user is obtained through a temperature sensor, and the frequency of a compressor, the two-way valve (such as the two-way valve 1 and/or the two-way valve 2), the rotating speed of an indoor fan of the air conditioner and the rotating speed of an outdoor fan of the air conditioner are adjusted according to preset values, so that the air conditioner can operate in a low energy consumption state after meeting the requirements of the user, the frequent on-off and the frequent on-off caused by reaching the set temperature of the user after long-time operation can be avoided, the comfort experience of the user and the service life of the air conditioner can be influenced, the comfort experience of the user and the service life of the air conditioner can be facilitated, and the service life of the air conditioner can be prolonged.
The heat exchange areas of the indoor heat exchanger 1 and the indoor heat exchanger 2 can be the same or different, and the heat exchange areas are not required to be consistent. The heat exchangers with the same heat exchange area can be used for production, and the heat exchangers with different heat exchange areas can be used for meeting certain service environments. The main function of reducing the area of the indoor heat exchanger is to reduce the cold (heat) output of the air conditioner to the room. The heat exchange area of the outdoor heat exchanger is unchanged, and the heat exchange of the air conditioner can be influenced by only reducing the area of the indoor heat exchanger. Of course, if the heat exchange area of the indoor heat exchanger and the outdoor heat exchanger is reduced at the same time, the heat exchange effect of the air conditioner is further deteriorated.
In some embodiments, the indoor environment temperature of the air conditioner obtained in step S120 when the indoor heat exchanger operates according to the set maximum heat exchange area is recorded as a first indoor environment temperature of the air conditioner, for example, a current indoor environment temperature t after the air conditioner is turned on 0 。
In step S130, controlling at least one of the operating frequency of the compressor, the rotational speed of the indoor fan, the rotational speed of the outdoor fan, and the switching on and off of the switching unit again according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner includes: the first process of controlling the running frequency of the compressor under the condition that the indoor heat exchanger works according to the set maximum heat exchange area.
The following further describes, with reference to a schematic flow chart of an embodiment of the method shown in fig. 2, which controls the operating frequency of the compressor when the indoor heat exchanger operates according to the set maximum heat exchange area, a specific process of controlling the operating frequency of the compressor when the indoor heat exchanger operates according to the set maximum heat exchange area in step S130, including: step S210 to step S230.
Step S210, determining an absolute value of a temperature difference between a first indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, and recording the absolute value as a first absolute value of temperature difference.
Step S220, determining whether the absolute value of the first temperature difference is less than or equal to a first preset temperature (e.g. a first preset temperature t) Preset value 1 )。
Step S230, recording the compressionThe current running frequency of the machine is a first frequency; and if the absolute value of the first temperature difference is determined to be less than or equal to a first preset temperature, controlling the running frequency of the compressor to be reduced from the first frequency to a set frequency, and obtaining a second frequency. And controlling the compressor to operate for a set time according to the second frequency so as to enable the air conditioner to maintain an operating state under set energy consumption under the condition that the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner. Wherein the first frequency is the original operating frequency f 0 Setting frequency such as setting frequency delta f, second frequency = original operating frequency f 0 -setting a frequency Δ f. Setting time, e.g. setting time m 0 . Of course, if it is determined that the first absolute value of the temperature difference is greater than the first preset temperature, the air conditioner is controlled to maintain the current operation state, and it is continuously determined whether the first absolute value of the temperature difference is less than or equal to the first preset temperature (e.g., the first preset temperature t) Preset value 1 )。
Fig. 8 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention. As shown in fig. 8, a control method of an air conditioner according to an aspect of the present invention includes:
step 1, in the running process of the air conditioner after being started, opening the two-way valve 1, closing the two-way valve 2 at the same time, and detecting the current indoor environment temperature t 0 And the temperature t set by the user Is provided with The difference between them.
Step 2, when the current indoor environment temperature t is detected 0 And a user set temperature t Is provided with The difference between them satisfies: | current indoor ambient temperature t 0 User set temperature t Is provided with |. Or less than first preset temperature t Preset value 1 While the running frequency of the compressor is changed from the original running frequency f 0 The set frequency Δ f is lowered. Wherein the first preset temperature t Preset value 1 The recommended value is 3 ℃ and the user required temperature (i.e. the user set temperature t) Is provided with ) The phase difference is small, the operation frequency of the compressor is reduced, the user experience is not influenced, and the recommended value of the frequency delta f is set to be 4Hz.
In some embodiments, step S1 will be performed after the compressor is operated at the second frequency for a set time20, recording the indoor ambient temperature of the air conditioner as a second indoor ambient temperature of the air conditioner, such as the set time m for the compressor to operate after frequency reduction 0 Rear current indoor ambient temperature t 1 。
In step S130, controlling at least one of the operating frequency of the compressor, the rotational speed of the indoor fan, the rotational speed of the outdoor fan, and the switching on and off of the switching unit again according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, further includes: the second process of controlling the operating frequency of the compressor is continued after the compressor is operated at the second frequency for a set time.
Referring to the flowchart of fig. 3, in the method of the present invention, a specific process of continuing to control the operating frequency of the compressor after the compressor operates at the second frequency for the set time is further described, including: step S310 to step S360.
And step S310, after controlling the compressor to operate at the second frequency for a set time, determining whether the second indoor environment temperature of the air conditioner does not reach the target temperature of the air conditioner. The term "not reached" means that the second indoor ambient temperature is higher than the target temperature in the cooling mode, and the second indoor ambient temperature is lower than the target temperature in the heating mode.
Step S320, if it is determined that the second indoor ambient temperature of the air conditioner does not reach the target temperature of the air conditioner, controlling the operating frequency of the compressor to be restored to the first frequency by the second frequency, and controlling the compressor to operate according to the first frequency, and then returning to re-determine the absolute value of the temperature difference between the first indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, to be recorded as a first temperature difference absolute value, and re-determine whether the first temperature difference absolute value is less than or equal to a first preset temperature, so that the air conditioner maintains the operating state under the set energy consumption when the indoor ambient temperature of the air conditioner reaches the target temperature of the air conditioner.
Step S330, if it is determined that the second indoor ambient temperature of the air conditioner has reached the target temperature of the air conditioner, determining an absolute value of a temperature difference between the second indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, and recording the absolute value as a second absolute value of temperature difference.
Step S340, determining whether the absolute value of the second temperature difference is less than or equal to a second preset temperature (e.g. a second preset temperature t) Preset value 2 )。
And step S350, if the second temperature difference absolute value is larger than the second preset temperature, controlling the compressor to keep running according to the second frequency, then returning to determine the absolute value of the temperature difference between the second indoor environment temperature of the air conditioner and the target temperature of the air conditioner again, recording the absolute value as the second temperature difference absolute value, and determining whether the second temperature difference absolute value is smaller than or equal to the second preset temperature again, so that the air conditioner can keep running under the condition of setting energy consumption when the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner.
Step S360, if the second absolute temperature difference value is smaller than or equal to a second preset temperature, controlling the running frequency of the compressor to be reduced from the second frequency to a set frequency to obtain a third frequency; and controlling the compressor to operate for a set time according to the third frequency so as to enable the air conditioner to maintain an operating state under set energy consumption under the condition that the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner. Wherein the first frequency is the original operating frequency f 0 Setting frequency such as setting frequency Δ f, second frequency = original operation frequency f 0 -setting the frequency Δ f. Third frequency = original operating frequency f 0 -set frequency Δ f. Setting time, e.g. setting time m 0 。
Specifically, as shown in fig. 8, the control method for an air conditioner according to the present invention further includes:
step 3, the running frequency of the compressor is changed from the current frequency f 0 After reducing the set frequency Deltaf, the operation is performed for a set time m 0 (setting time m) 0 Recommended value of 3 min), if the compressor is detected to operate for the set time m after being subjected to frequency reduction in the refrigeration mode 0 Rear current indoor ambient temperature t 1 The current indoor environment temperature t is not less than the current indoor environment temperature t after the air conditioner is started 0 (detecting the current indoor ambient temperature t after the air conditioner is turned on in the heating mode 0 Not less than the set running time m after the compressor is frequency-reduced 0 Rear current indoor ambient temperature t 1 ) If so, the air conditioner is indicated to have poor refrigerating (or heating) capacity, and the operation frequency of the compressor is changed from the original operation frequency f 0 -raising the set frequency Δ f) to the original operating frequency f 0 And then returning to the step 2, otherwise, executing the step 4.
Step 4, judging whether the operation set time m after the frequency reduction of the compressor is satisfied 0 Rear current indoor ambient temperature t 1 User set temperature t Is provided with |. Or less than second preset temperature t Preset value 2 (second predetermined temperature t) Preset value 2 Recommended value of 1 ℃): if not, step 41 is executed, otherwise, step 42 is executed.
Step 41, when the compressor runs for a set time m after down-conversion 0 Rear current indoor ambient temperature t 1 User-set temperature t Is provided with | is > a second predetermined temperature t Preset value 2 At the same time, the compressor in the air conditioner maintains the frequency (i.e. the original operation frequency f) 0 Set frequency Δ f) operation, causing the indoor ambient temperature to slowly decrease (or increase) to the user-requested temperature (i.e. user-set temperature t) Is provided with ) And then returns to step 4. After the operation of the frequency is maintained, the air conditioner still detects the difference between the indoor environment temperature and the user set temperature, and operates for a set time m after the down conversion of the compressor 0 Rear current indoor ambient temperature t 1 User-set temperature t Is provided with | when changes occur, the steps are performed with corresponding adjustments.
Step 42, when the compressor is down-converted, the operation is carried out for a set time m 0 Rear current indoor ambient temperature t 1 User-set temperature t Is provided with |. Or less than second preset temperature t Preset value 2 While continuing to decrease the operating frequency of the compressor (i.e., continuing to decrease Δ f), i.e., causingThe running frequency of the compressor is changed from the current frequency f 0 After the setting frequency Δ f is lowered, the setting frequency Δ f is lowered.
In some embodiments, the indoor environment temperature of the air conditioner obtained in step S120 after the compressor operates at the third frequency for the set time is recorded as a third indoor environment temperature of the air conditioner, for example, a current indoor environment temperature t after the compressor performs secondary frequency reduction 2 。
In step S130, controlling at least one of the operating frequency of the compressor, the rotational speed of the indoor fan, the rotational speed of the outdoor fan, and the switching on and off of the switching unit again according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, further includes: and a third process of controlling the rotation speed of the indoor and outdoor fans after the compressor operates for a set time at the third frequency.
Referring to fig. 4, a flowchart of an embodiment of controlling the rotational speeds of the indoor and outdoor fans after the compressor operates for the set time according to the third frequency in the method of the present invention will be further described, where the specific process of controlling the rotational speeds of the indoor and outdoor fans after the compressor operates for the set time according to the third frequency in step S130 includes: step S410 to step S440.
And step S410, after the compressor is controlled to operate for a set time according to the third frequency, determining an absolute value of a temperature difference between the ambient temperature in the third room of the air conditioner and the target temperature of the air conditioner, and recording the absolute value as a third temperature difference absolute value.
Step S420, determining whether the absolute value of the third temperature difference is less than or equal to a third preset temperature (e.g. a third preset temperature t) Preset value 3 )。
And step S430, if the third absolute value of the temperature difference is determined to be greater than a third preset temperature, controlling the compressor to maintain to operate according to the third frequency, then returning to re-determine an absolute value of a temperature difference between a third indoor environment temperature of the air conditioner and a target temperature of the air conditioner, recording the absolute value as the third absolute value of the temperature difference, and re-determining whether the third absolute value of the temperature difference is less than or equal to the third preset temperature, so that the air conditioner can maintain an operating state under the condition of set energy consumption when the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner.
And step S440, if the third absolute temperature difference value is smaller than or equal to a third preset temperature, reducing the rotating speed of at least one fan of the indoor fan and the outdoor fan, and controlling the fan to operate for a set time according to the reduced rotating speed so as to enable the air conditioner to maintain an operating state under the set energy consumption condition when the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner.
Specifically, as shown in fig. 8, the control method for an air conditioner according to the present invention further includes:
in step 42, the operation frequency of the compressor is changed from the current frequency f 0 After two set frequencies delta f are reduced, the current indoor environment temperature t after the secondary frequency reduction of the compressor is detected 2 And the temperature t set by the user Is provided with And the difference therebetween, step 5 is performed.
Step 5, judging whether the current indoor environment temperature t after the secondary frequency reduction of the compressor in the refrigeration mode is met 2 User-set temperature t Is provided with Not more than third preset temperature t Preset value 3 Time (user set temperature t in heating mode) Is provided with Current indoor ambient temperature t after secondary compressor frequency reduction 2 Not more than third preset temperature t Preset value 3 Third predetermined temperature t Preset value 3 Recommended value of 0 ℃): if not, go to step 51, if yes, go to step 52.
Step 51, when the current indoor environment temperature t after the secondary frequency reduction of the compressor 2 User set temperature t Is provided with Is greater than a third preset temperature t Preset value 3 Time (user set temperature t in heating mode) Is provided with Current indoor ambient temperature t after secondary compressor frequency reduction 2 ＞t Preset value 3 ) When the compressor in the air conditioner is in the normal state, the compressor maintains the frequency (i.e. the running frequency of the compressor is changed from the current frequency f) 0 After the set frequency Δ f is lowered, the operation is performed with the set frequency Δ f) lowered, and then the process returns to step 5.
Step 52, pressingCurrent indoor environment temperature t after secondary frequency reduction of compressor 2 User set temperature t Is provided with Not more than third preset temperature t Preset value 3 Time (user set temperature t in heating mode) Is provided with Current indoor ambient temperature t after secondary compressor frequency reduction 2 ≤t Preset value 3 ) And when the compressor is reduced to the lowest running frequency, the rotating speed of the indoor and outdoor fans of the air conditioner is reduced, and then step 6 is executed. The lowest operating frequency of the compressor is also changed when the outdoor environment temperature is different. The minimum operating frequency of the compressor is about 14Hz if the outdoor temperature is relatively low, and about 26Hz if the outdoor temperature is relatively high. In order to ensure reliability, the frequency is not directly reduced to the lowest frequency, and if the frequency is directly reduced to the lowest frequency, the cooling and heating effects may be deteriorated, which results in the unsatisfactory requirements, therefore, the frequency is generally set to be m per set time 0 The set frequency Δ f is gradually reduced until the lowest operating frequency is reduced.
In some embodiments, the indoor environment temperature of the air conditioner obtained in step S120 after the rotational speed of at least one of the indoor fan and the outdoor fan is reduced and the fan is controlled to operate at the reduced rotational speed for a set time is recorded as a fourth indoor environment temperature of the air conditioner.
In step S130, controlling at least one of the operating frequency of the compressor, the rotational speed of the indoor fan, the rotational speed of the outdoor fan, and the switching on/off of the switching unit according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, further includes: and a fourth process of controlling the on-off of the switch unit again after the compressor operates at the third frequency for a set time.
With reference to the schematic flow chart of an embodiment of the method shown in fig. 5, in which the on/off of the switch unit is controlled again after the compressor operates for the set time according to the third frequency, the specific process of controlling the on/off of the switch unit again after the compressor operates for the set time according to the third frequency in step S130 is further described, which includes: step S510 to step S530.
Step S510, after reducing the rotation speed of at least one of the indoor fan and the outdoor fan and controlling the fan to operate for a set time at the reduced rotation speed, determining whether a fourth indoor ambient temperature of the air conditioner exceeds a target temperature of the air conditioner. The exceeding means that the fourth indoor ambient temperature is lower than the target temperature in the cooling mode, and the fourth indoor ambient temperature is higher than the target temperature in the heating mode.
Step S520, if it is determined that the fourth indoor ambient temperature of the air conditioner does not exceed the target temperature of the air conditioner, controlling the air conditioner to maintain the current operation mode, for example, controlling the compressor to maintain the operation at the third frequency, controlling at least one of the outdoor fan and the indoor fan to operate at the reduced rotation speed, and then returning to re-determine whether the fourth indoor ambient temperature of the air conditioner exceeds the target temperature of the air conditioner, so that the air conditioner maintains the operation state under the set energy consumption when the indoor ambient temperature of the air conditioner reaches the target temperature of the air conditioner.
Step S530, if it is determined that the fourth indoor environment temperature of the air conditioner exceeds the target temperature of the air conditioner, controlling the on/off of the switch unit again to reduce the actual heat exchange area of the indoor heat exchanger, for example, to half of the set maximum heat exchange area, so that the air conditioner maintains the operating state under the set energy consumption when the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner.
Wherein, in step S530, the on/off of the switch unit is controlled again, so that the actual heat exchange area of the indoor heat exchanger is reduced, including: and under the condition that the indoor heat exchanger comprises a first heat exchanger and a second heat exchanger and the switch unit comprises a first two-way valve and a second two-way valve, controlling the first two-way valve to be closed and controlling the second two-way valve to be opened so as to enable the air conditioner to maintain the running state under the set energy consumption under the condition that the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner, and then returning to control at least one of the running frequency of the compressor, the rotating speed of the indoor fan, the rotating speed of the outdoor fan and the switching on and off of the switch unit continuously according to the indoor environment temperature of the air conditioner and the target temperature of the air conditioner, so that the air conditioner can maintain the running state under the set energy consumption under the condition that the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner continuously.
Specifically, as shown in fig. 8, the control method for an air conditioner according to the present invention further includes: step 6, after the rotating speed of the indoor and outdoor fans of the air conditioner is reduced, the set time m is operated 0 Then, the current indoor environment temperature t after the rotating speed of the indoor and outdoor fans is reduced is judged 3 And a user set temperature t Is provided with The difference between, if still: the current indoor environment temperature t after the rotating speed of the indoor and outdoor fans is reduced in the refrigeration mode 3 User set temperature t Is provided with Not more than a third preset temperature t Preset value 3 (or user-set temperature t in heating mode Is provided with Current indoor ambient temperature t after reduction of indoor and outdoor fan speed 3 Not more than third preset temperature t Preset value 3 ) And when the air conditioner is started, the two-way valve 1 is closed, the two-way valve 2 is opened, the heat exchange area of the indoor heat exchanger is reduced, the cold (or heat) quantity output by the air conditioner can keep a relative balance position with the room load, the compressor in the air conditioner is prevented from being frequently started and stopped, and then the air conditioner returns to the step 5. When the cold (heat) output by the air conditioner is reduced to the minimum, whether the cold (heat) output by the air conditioner can meet the room load requirement or not and whether the cold (heat) output by the air conditioner needs to be increased or not are considered; it is therefore necessary to return to step 5 to determine whether the compressor frequency needs to be raised to the current frequency f 0 After the setting frequency Δ f is lowered, the setting frequency Δ f is lowered.
Wherein, the inner and outer fan rotational speed can move simultaneously or reduce one and then reduce the other. The reduction in the rotation speed of the inner and outer fans is not uniform. The outdoor fan switches the wind gear according to the frequency change, for example, when the operation frequency is lower than 46Hz, the rotating speed of the outdoor fan is switched from high wind gear (780 rpm) to low wind gear (600 rpm), and the room is reduced in the cooling modeCurrent indoor environment temperature t after rotation speed of internal and external fans 3 User set temperature t Is provided with Not more than third preset temperature t Preset value 3 (or user-set temperature t in heating mode Is provided with Current indoor ambient temperature t after reduction of indoor and outdoor fan speed 3 Not more than third preset temperature t Preset value 3 ) The outer fan speed is reduced to the minimum speed (500 rpm).
The rotating speed of the indoor fan is also required to be adjusted according to the temperature of the indoor heat exchanger, and the current indoor environment temperature t after the rotating speed of the indoor and outdoor fans is reduced in the refrigeration mode 3 User set temperature t Is provided with Not more than third preset temperature t Preset value 3 (or user-set temperature t in heating mode Is provided with Current indoor ambient temperature t after reduction of indoor and outdoor fan speed 3 Not more than third preset temperature t Preset value 3 ) Then, the rotating speed of the indoor fan is reduced according to the set rotating speed delta r (50 rpm) every t time (such as 40 s) until the current indoor environment temperature t is obtained after the rotating speed of the indoor and outdoor fans is reduced in the refrigeration mode 3 User set temperature t Is provided with Is greater than a third preset temperature t Preset value 3 (or user-set temperature t in heating mode Is provided with Current indoor ambient temperature t after reduction of indoor and outdoor fan speed 3 Is greater than a third preset temperature t Preset value 3 ) Or the indoor fan speed has been reduced to a minimum (350 rpm) and then the current indoor fan speed is maintained in operation. It should be noted that when the temperature of the indoor heat exchanger is lower (higher) than the set value (e.g. the set value is 2 ℃ during cooling and 56 ℃ during heating) during cooling, the rotating speed of the indoor fan can not be reduced, so as to avoid the problem of frosting when the temperature of the indoor heat exchanger is too low in the cooling mode, and avoid the too high pressure of the system where the air conditioner is located in the heating mode.
In the scheme of the invention, the main purpose is to avoid the problem that the air conditioner is frequently started and stopped after reaching the temperature set by a user in the later operation stage. In the related scheme, in the operation process of the air conditioner, when larger refrigerating and heating quantity is needed, the compressor is controlled to operate at a larger frequency, when the larger refrigerating and heating quantity is not needed, the compressor is controlled to operate at a smaller frequency, and when the ambient temperature in a refrigerating room is less than or equal to a set temperature (the ambient temperature in a heating room is greater than or equal to the set temperature), the control method is quitted, and the problems solved by the two methods are different.
In some alternative embodiments, the indoor heat exchanger may be divided into multiple sections, and the area of the indoor heat exchanger may be adjusted by multiple two-way valves to accommodate the cooling (heating) requirements of rooms of different loads. The two-way valves are used for controlling the on-off of the refrigerant of the air conditioner in the heat exchange pipeline of the indoor heat exchanger, and the heat exchange area of the indoor heat exchanger can be switched more accurately by adopting the two-way valves for matching different use environments. When the indoor heat exchanger is not required to be completely put into use, the area of the heat exchanger through which the refrigerant flows is adjusted by controlling the opening and closing of the two-way valve.
According to the scheme of the invention, after the air conditioner runs for a long time, the cold (heat) output of the air conditioner can be maintained at a balance position with the room load, so that the problem that the comfortable experience of a user and the service life of the air conditioner are influenced due to large fluctuation of the indoor environment temperature caused by frequent startup and shutdown after the air conditioner reaches the temperature set by the user in the later running stage is avoided, the comfortable experience of the user is favorably improved, and the service life of the air conditioner is prolonged.
By adopting the technical scheme of the embodiment, the actual heat exchanger area of the more than two indoor heat exchangers can be adjusted by on-off of the switch unit by arranging the more than two indoor heat exchangers and arranging the switch unit (such as the two-way valve) on the refrigerant heat exchange pipeline of the more than two indoor heat exchangers. In the operation process of the air conditioner, the operation frequency of the compressor is controlled according to the difference value between the indoor environment temperature and the user set temperature, the rotating speed of the indoor and outdoor fans and the on-off of the switch unit, so that the air conditioner can respond in advance when the room temperature (namely the indoor environment temperature) is close to the user set temperature, and the air conditioner is prevented from being operated at a higher frequency for a long time to quickly reach the set temperature and frequently start and stop the air conditioner, therefore, the air conditioner is operated at a low energy consumption state after the user requirement is met, the phenomenon that the compressor is repeatedly started and stopped to cause the indoor temperature to fluctuate greatly is avoided, the comfort experience of a user is facilitated to be improved, and the service life of the air conditioner is prolonged.
According to an embodiment of the present invention, there is also provided a control apparatus of an air conditioner corresponding to the control method of the air conditioner. Referring to fig. 6, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The air conditioner includes: the heat exchanger comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein an indoor fan is arranged at the indoor heat exchanger, and an outdoor fan is arranged at the outdoor heat exchanger. A switch unit is arranged on a refrigerant heat exchange pipeline of the indoor heat exchanger, and the actual heat exchange area of the indoor heat exchanger can be adjusted by switching on and off the switch unit. The control device of the air conditioner comprises: an acquisition unit 102 and a control unit 104.
The control unit 104 is configured to control on/off of the switch unit under the condition that the air conditioner is operated after being started, so that an actual heat exchange area of the indoor heat exchanger is a set maximum heat exchange area. The specific functions and processes of the control unit 104 are shown in step S110.
An obtaining unit 102 configured to obtain an indoor ambient temperature of the air conditioner and obtain a target temperature of the air conditioner, such as a user-set temperature t Is provided with . The specific function and processing of the acquiring unit 102 are referred to in step S120.
The control unit 104 is further configured to control at least one of an operation frequency of the compressor, a rotation speed of the indoor fan, a rotation speed of the outdoor fan, and re-on/off of the switching unit according to an indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, so that the air conditioner maintains an operation state at a set power consumption in a case where the indoor ambient temperature of the air conditioner reaches the target temperature of the air conditioner. The specific function and processing of the control unit 104 are also referred to in step S130.
According to the control device of the air conditioner, the detection of the current indoor environment temperature of the air conditioner is continuous in the operation process of the air conditioner, and when the difference value between the current indoor environment temperature of the air conditioner and the temperature set by a user meets the judgment condition, the air conditioner maintains the state that the current indoor environment temperature of the air conditioner and the temperature set by the user meets the judgment conditionWhen the current state is running and the difference value between the indoor environment temperature and the temperature set by the user changes, the judgment needs to be carried out again. Referring to the example shown in fig. 7, the indoor environment temperature (e.g., the current indoor environment temperature t) is detected during the operation of the air conditioner 0 Current indoor ambient temperature t 1 Current indoor ambient temperature t 2 Etc.) and a user-set temperature (e.g., user-set temperature t) Is provided with ) The difference of (2) to control the operating frequency of compressor in the air conditioner, the rotational speed of indoor outer fan and the break-make of electromagnetism two-way valve (being two-way valve 1 and two-way valve 2), make the air conditioner when room temperature (being indoor ambient temperature) is close user's settlement temperature, can make a response in advance, avoid the air conditioner to run with higher frequency for a long time, lead to the room temperature to reach the settlement temperature fast, make the air conditioner frequently appear and start and shut down, cause the room temperature to fluctuate, influence the user comfort and experience.
In some embodiments, the number of the indoor heat exchangers is two or more. Two or more indoor heat exchangers include: a first heat exchanger such as an indoor heat exchanger 1 and a second heat exchanger such as an indoor heat exchanger 2. The switching unit includes: a first two-way valve, such as two-way valve 1, and a second two-way valve, such as two-way valve 2. The first heat exchanger and the second heat exchanger are arranged in series, the first two-way valve is arranged in a pipeline between the first heat exchanger and the second heat exchanger, and the second two-way valve is arranged between a common end between the first heat exchanger and the first two-way valve and one end, far away from the first two-way valve, of the second heat exchanger.
The control unit 104 controls the on/off of the switch unit when the air conditioner is operated after being started, and includes: the control unit 104 is specifically configured to control the first two-way valve to be turned on and control the second two-way valve to be turned off when the air conditioner is operated after being turned on. And at the moment, the actual heat exchange area of the indoor heat exchanger is the sum of the heat exchange area of the first heat exchanger and the heat exchange area of the second heat exchanger.
Specifically, fig. 7 is a schematic structural diagram of an embodiment of an air conditioner according to the present invention. As shown in fig. 7, an air conditioner according to an aspect of the present invention includes: the system comprises a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger 1, an indoor heat exchanger 2, a two-way valve 1, a two-way valve 2 and a throttling device. And the exhaust port of the compressor is communicated to the first valve port of the four-way valve. The second port of the four-way valve is communicated to the first end of the outdoor heat exchanger on one hand and the first end of the indoor heat exchanger 1 on the other hand. The second end of the outdoor heat exchanger is communicated to the fourth valve port of the four-way valve, and communicated to the second end of the indoor heat exchanger 2 through the throttling device. And a second end of the indoor heat exchanger 1 is communicated to a first end of the indoor heat exchanger 2 through the two-way valve 1. And the second end of the indoor heat exchanger 1 is also communicated to the second end of the indoor heat exchanger 2 through the two-way valve 2. The third valve port of the four-way valve is communicated to the air suction port of the compressor after passing through the gas-liquid separator.
Referring to the example shown in fig. 7, two-way valves (i.e., two-way valve 1 and two-way valve 2) are used in cooperation, and the two-way valves (i.e., two-way valve 1 and two-way valve 2) are used for controlling the on/off of corresponding refrigerant pipelines in the system where the air conditioner is located. Specifically, when the indoor heat exchanger 1 and the indoor heat exchanger 2 of the air conditioner are both required to be put into use, the two-way valve 1 is opened, and the two-way valve 2 is closed, so that the refrigerant in the corresponding refrigerant pipeline in the system where the air conditioner is located flows through the indoor heat exchanger 1 and the indoor heat exchanger 2. When only one indoor heat exchanger is used, the two-way valve 1 is closed, and the two-way valve 2 is opened, so that the refrigerant in the corresponding refrigerant pipeline in the system where the air conditioner is located only flows through the indoor heat exchanger 1.
In the scheme of the invention, a two-way valve (such as a two-way valve 1) is arranged between two adjacent heat exchangers in more than two indoor heat exchangers (such as an indoor heat exchanger 1 and an indoor heat exchanger 2), another two-way valve (such as a two-way valve 2) is connected in parallel on a serial pipeline of the two-way valve (such as the two-way valve 1) and the indoor heat exchanger, after the air conditioner operates for a period of time, a difference value between the indoor ambient temperature and the temperature set by a user is obtained through a temperature sensor, and the frequency of a compressor, the two-way valve (such as the two-way valve 1 and/or the two-way valve 2), the rotating speed of an indoor fan and the rotating speed of an outdoor fan of the air conditioner are adjusted according to preset values, so that the air conditioner can operate in a low-energy-consumption state after meeting the requirements of the user, the frequent on-off and on-off caused by reaching the temperature set by the user after long-time operation are avoided, the comfortable experience of the user and the service life of the air conditioner are influenced, the comfortable experience of the user and the service life of the air conditioner is facilitated, and the service life of the air conditioner is prolonged.
The heat exchange areas of the indoor heat exchanger 1 and the indoor heat exchanger 2 can be the same or different, and the heat exchange areas are not required to be consistent. The heat exchangers with the same heat exchange area can be used for production, and the heat exchangers with different heat exchange areas can be used for meeting certain service environments. The main function of reducing the area of the indoor heat exchanger is to reduce the cold (heat) output of the air conditioner to the room. The heat exchange area of the outdoor heat exchanger is unchanged, and the heat exchange of the air conditioner can be influenced by only reducing the area of the indoor heat exchanger. Of course, if the heat exchange area of the indoor heat exchanger and the outdoor heat exchanger is reduced at the same time, the heat exchange effect of the air conditioner is further deteriorated.
In some embodiments, the control unit 104 is further configured to record the indoor environment temperature of the air conditioner obtained when the indoor heat exchanger operates according to the set maximum heat exchange area as a first indoor environment temperature of the air conditioner, such as a current indoor environment temperature t after the air conditioner is turned on 0 。
The controlling unit 104 controls at least one of the operating frequency of the compressor, the rotational speed of the indoor fan, the rotational speed of the outdoor fan, and the re-on/off of the switching unit according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, and includes: the first process of controlling the operating frequency of the compressor under the condition that the indoor heat exchanger works according to the set maximum heat exchange area specifically comprises the following steps:
the control unit 104 is further configured to determine an absolute value of a temperature difference between a first indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, and record the absolute value as a first absolute value of a temperature difference. The specific functions and processes of the control unit 104 are also referred to in step S210.
The control unit 104 is specifically further configured to determine whether the absolute value of the first temperature difference is less than or equal to a first preset temperature (e.g., a first preset temperature t) Preset value 1 ). The specific functions and processes of the control unit 104 are also referred to in step S220.
The control unit 104 is specifically further configured to record a current operating frequency of the compressor as a first frequency; and if the absolute value of the first temperature difference is determined to be smaller than or equal to a first preset temperature, controlling the running frequency of the compressor to be reduced from the first frequency to a set frequency, and obtaining a second frequency. And controlling the compressor to operate for a set time according to the second frequency so as to enable the air conditioner to maintain an operating state under set energy consumption under the condition that the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner. Wherein the first frequency is the original operating frequency f 0 Setting frequency such as setting frequency Δ f, second frequency = original operation frequency f 0 -setting the frequency Δ f. Setting time, e.g. setting time m 0 . Of course, if it is determined that the first absolute value of the temperature difference is greater than the first preset temperature, the air conditioner is controlled to maintain the current operation state, and it is continuously determined whether the first absolute value of the temperature difference is less than or equal to the first preset temperature (e.g., the first preset temperature t) Preset value 1 ). The specific function and processing of the control unit 104 are also referred to as step S230.
Fig. 8 is a flowchart illustrating an embodiment of a control device of an air conditioner according to the present invention. As shown in fig. 8, a control device for an air conditioner according to an aspect of the present invention includes:
step 1, in the running process of the air conditioner after being started, opening the two-way valve 1, closing the two-way valve 2 at the same time, and detecting the current indoor environment temperature t 0 And the temperature t set by the user Is provided with The difference between them.
Step 2, when the current indoor environment temperature t is detected 0 And the temperature t set by the user Is provided with The difference between them satisfies: | current indoor ambient temperature t 0 User set temperature t Is provided with |. Or less than the first preset temperature t Preset value 1 When the compressor is operatedThe frequency is changed from the original running frequency f 0 The set frequency Δ f is lowered. Wherein the first preset temperature t Preset value 1 The recommended value is 3 ℃ and the user required temperature (i.e. the user set temperature t) Is provided with ) The phase difference is small, the operation frequency of the compressor is reduced, the user experience is not influenced, and the recommended value of the frequency delta f is set to be 4Hz.
In some embodiments, the control unit 104 is further configured to record the indoor ambient temperature of the air conditioner obtained after the compressor operates at the second frequency for the set time as a second indoor ambient temperature of the air conditioner, such as a compressor down-converted operation set time m 0 Rear current indoor ambient temperature t 1 。
The control unit 104 controls at least one of the operation frequency of the compressor, the rotation speed of the indoor fan, the rotation speed of the outdoor fan, and the re-on/off of the switch unit according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, and further includes: and continuing to control the second process of the operating frequency of the compressor after the compressor operates for the set time at the second frequency, which is specifically as follows:
the control unit 104 is specifically further configured to determine whether a second indoor ambient temperature of the air conditioner does not reach the target temperature of the air conditioner after controlling the compressor to operate at the second frequency for a set time. The term "not reached" means that the second indoor ambient temperature is higher than the target temperature in the cooling mode, and the second indoor ambient temperature is lower than the target temperature in the heating mode. The specific functions and processes of the control unit 104 are also referred to in step S310.
The control unit 104 is specifically further configured to control the operation frequency of the compressor to be recovered to the first frequency by the second frequency if it is determined that the second indoor ambient temperature of the air conditioner does not reach the target temperature of the air conditioner, and control the compressor to operate at the first frequency, and then return to re-determine the absolute value of the temperature difference between the first indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, and record the absolute value as a first temperature difference, and re-determine whether the absolute value of the first temperature difference is smaller than or equal to a first preset temperature, so that the air conditioner maintains the operation state under the set energy consumption when the indoor ambient temperature of the air conditioner reaches the target temperature of the air conditioner. The specific functions and processes of the control unit 104 are also referred to in step S320.
The control unit 104 is further specifically configured to determine an absolute value of a temperature difference between the second indoor environment temperature of the air conditioner and the target temperature of the air conditioner, and record the absolute value as a second temperature difference absolute value, if it is determined that the second indoor environment temperature of the air conditioner has reached the target temperature of the air conditioner. The specific functions and processes of the control unit 104 are also referred to in step S330.
The control unit 104 is specifically further configured to determine whether the absolute value of the second temperature difference is less than or equal to a second preset temperature (e.g. a second preset temperature t) Preset value 2 ). The specific function and processing of the control unit 104 are also referred to as step S340.
The control unit 104 is specifically further configured to, if it is determined that the second absolute value of the temperature difference is greater than a second preset temperature, control the compressor to maintain the operation at the second frequency, and then return to re-determine an absolute value of a temperature difference between a second indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, which is recorded as the second absolute value of the temperature difference, and re-determine whether the second absolute value of the temperature difference is less than or equal to the second preset temperature, so that the air conditioner maintains the operation state under the set energy consumption when the indoor ambient temperature of the air conditioner reaches the target temperature of the air conditioner. The specific functions and processes of the control unit 104 are also referred to in step S350.
The control unit 104 is specifically further configured to, if it is determined that the absolute value of the second temperature difference is smaller than or equal to a second preset temperature, control the operating frequency of the compressor to decrease from the second frequency to a set frequency to obtain a third frequency; and controlling the compressor to operate for a set time according to the third frequency so as to enable the air conditioner to work when the indoor environment temperature of the air conditioner reaches the target temperature of the air conditionerAnd maintaining the running state under the set energy consumption. Wherein the first frequency is the original operating frequency f 0 Setting frequency such as setting frequency Δ f, second frequency = original operation frequency f 0 -setting the frequency Δ f. Third frequency = original running frequency f 0 -set frequency Δ f. Setting time, e.g. setting time m 0 . The specific function and processing of the control unit 104 are also referred to in step S360.
Specifically, as shown in fig. 8, the control device for an air conditioner according to the present invention further includes:
step 3, the running frequency of the compressor is changed from the current frequency f 0 After reducing the set frequency Deltaf, the operation is performed for a set time m 0 (setting time m) 0 Recommended value of 3 min), if the compressor is detected to operate for the set time m after being subjected to frequency reduction in the refrigeration mode 0 Rear current indoor ambient temperature t 1 The current indoor environment temperature t is not less than the current indoor environment temperature t after the air conditioner is started 0 (detecting the current indoor ambient temperature t after the air conditioner is turned on in the heating mode 0 Not less than the set running time m after the compressor frequency reduction 0 Rear current indoor ambient temperature t 1 ) If so, the air conditioner is indicated to have poor refrigerating (or heating) capacity, and the operation frequency of the compressor is changed from the original operation frequency f 0 -raising the set frequency Δ f) to the original operating frequency f 0 And then returning to the step 2, otherwise, executing the step 4.
Step 4, judging whether the operation set time m after the frequency reduction of the compressor is satisfied 0 Rear current indoor ambient temperature t 1 User set temperature t Is provided with |. Or less than second preset temperature t Preset value 2 (second predetermined temperature t) Preset value 2 Recommended value of 1 ℃): if not, step 41 is executed, otherwise, step 42 is executed.
Step 41, when the compressor is down-converted, the operation is carried out for a set time m 0 Rear current indoor ambient temperature t 1 User set temperature t Is provided with | a second predetermined temperature t Preset value 2 At the same time, the compressor in the air conditioner maintains the frequency (i.e. the original operation frequency f) 0 Setting the frequency Δ f) to operate so as to slowly reduce (or increase) the indoor ambient temperature to the temperature required by the user(i.e. user set temperature t) Is provided with ) And then returns to step 4.
Step 42, when the compressor is down-converted, the compressor is operated for a set time m 0 Rear current indoor ambient temperature t 1 User-set temperature t Is provided with |. Or less than second preset temperature t Preset value 2 Then, the operation frequency of the compressor is continuously decreased (i.e. Δ f is continuously decreased), i.e. the operation frequency of the compressor is made to be equal to the current frequency f 0 After the setting frequency Δ f is lowered, the setting frequency Δ f is lowered.
In some embodiments, the control unit 104 is further configured to record the indoor environment temperature of the air conditioner obtained after the compressor operates at the third frequency for a set time as a third indoor environment temperature of the air conditioner, such as a current indoor environment temperature t after the compressor is secondarily frequency-down 2 。
The controlling unit 104 controls at least one of the operation frequency of the compressor, the rotation speed of the indoor fan, the rotation speed of the outdoor fan, and the re-on/off of the switching unit according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, and further includes: and a third process of controlling the rotating speed of the indoor and outdoor fans after the compressor runs for the set time according to the third frequency, which is specifically as follows:
the control unit 104 is specifically further configured to, after controlling the compressor to operate at the third frequency for a set time, determine an absolute value of a temperature difference between an ambient temperature in a third room of the air conditioner and a target temperature of the air conditioner, and record the absolute value as a third absolute value of the temperature difference. The specific functions and processes of the control unit 104 are also referred to in step S410.
The control unit 104 is specifically further configured to determine whether the third absolute value of the temperature difference is less than or equal to a third preset temperature (e.g. a third preset temperature t) Preset value 3 ). The specific function and processing of the control unit 104 are also referred to in step S420.
The control unit 104 is specifically further configured to, if it is determined that the third absolute value of the temperature difference is greater than a third preset temperature, control the compressor to maintain to operate at the third frequency, and then return to re-determine an absolute value of a temperature difference between a third indoor environment temperature of the air conditioner and the target temperature of the air conditioner, record the absolute value as the third absolute value of the temperature difference, and re-determine whether the third absolute value of the temperature difference is less than or equal to the third preset temperature, so that the air conditioner maintains an operating state under the set energy consumption when the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner. The detailed function and processing of the control unit 104 are also referred to in step S430.
The control unit 104 is specifically further configured to, if it is determined that the third absolute value of the temperature difference is smaller than or equal to a third preset temperature, decrease the rotation speed of at least one of the indoor fan and the outdoor fan, and control the fan to operate at the decreased rotation speed for a set time, so that the air conditioner maintains an operating state under a set energy consumption when the indoor ambient temperature of the air conditioner reaches the target temperature of the air conditioner. The specific functions and processes of the control unit 104 are also referred to in step S440.
Specifically, as shown in fig. 8, the control device for an air conditioner according to the present invention further includes:
in step 42, the operation frequency of the compressor is changed from the current frequency f 0 After two set frequencies delta f are reduced, the current indoor environment temperature t after the secondary frequency reduction of the compressor is detected 2 And a user set temperature t Is provided with And the difference therebetween, step 5 is performed.
Step 5, judging whether the current indoor environment temperature t after the secondary frequency reduction of the compressor in the refrigeration mode is met 2 User set temperature t Is provided with Not more than third preset temperature t Preset value 3 Time (user set temperature t in heating mode) Is provided with Current indoor ambient temperature t after secondary compressor frequency reduction 2 Not more than third preset temperature t Preset value 3 Third predetermined temperature t Preset value 3 Recommended value of 0 ℃): if not, go to step 51, if yes, go to step 52.
Step 51, when the current indoor environment temperature t after the secondary frequency reduction of the compressor 2 -user set temperatureDegree t Is provided with Is greater than a third preset temperature t Preset value 3 Time (user set temperature t in heating mode) Is provided with Current indoor ambient temperature t after secondary compressor frequency reduction 2 ＞t Preset value 3 ) When the compressor in the air conditioner is in the normal state, the compressor maintains the frequency (i.e. the running frequency of the compressor is changed from the current frequency f) 0 After the set frequency Δ f is lowered, the operation is performed with the set frequency Δ f) lowered, and then the process returns to step 5.
Step 52, current indoor environment temperature t after secondary frequency reduction of the compressor 2 User set temperature t Is provided with Not more than third preset temperature t Preset value 3 Time (user set temperature t in heating mode) Is provided with Current indoor ambient temperature t after secondary compressor frequency reduction 2 ≤t Preset value 3 ) And when the compressor is reduced to the lowest running frequency, the rotating speed of the indoor and outdoor fans of the air conditioner is reduced, and then step 6 is executed. The minimum operating frequency of the compressor is also changed due to different outdoor ambient temperatures. The minimum operating frequency of the compressor is about 14Hz if the outdoor temperature is relatively low, and about 26Hz if the outdoor temperature is relatively high. In order to ensure reliability, the frequency is not directly reduced to the lowest frequency, and if the frequency is directly reduced to the lowest frequency, the cooling and heating effects may be deteriorated, which results in the unsatisfactory requirements, therefore, the frequency is generally set to be m per set time 0 The set frequency Δ f is gradually reduced until the lowest operating frequency is reduced.
In some embodiments, the control unit 104 is further configured to calculate an indoor ambient temperature of the air conditioner, which is obtained after the rotational speed of at least one of the indoor fan and the outdoor fan is reduced and the fan is controlled to operate at the reduced rotational speed for a set time, as a fourth indoor ambient temperature of the air conditioner.
The control unit 104 controls at least one of the operation frequency of the compressor, the rotation speed of the indoor fan, the rotation speed of the outdoor fan, and the re-on/off of the switch unit according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, and further includes: and a fourth process of controlling the on-off of the switch unit again after the compressor runs for the set time according to the third frequency, which is concretely as follows:
the control unit 104 is specifically further configured to determine whether a fourth indoor ambient temperature of the air conditioner exceeds the target temperature of the air conditioner after reducing the rotation speed of at least one of the indoor fan and the outdoor fan and controlling the fan to operate at the reduced rotation speed for a set time. The exceeding means that the fourth indoor ambient temperature is lower than the target temperature in the cooling mode, and the fourth indoor ambient temperature is higher than the target temperature in the heating mode. The specific functions and processes of the control unit 104 are also referred to in step S510.
The control unit 104 is specifically further configured to, if it is determined that the fourth indoor ambient temperature of the air conditioner does not exceed the target temperature of the air conditioner, control the air conditioner to maintain a current operation mode, for example, control the compressor to maintain operation at a third frequency, control at least one of the outdoor fan and the indoor fan to operate at a reduced rotation speed, and then return to determine again whether the fourth indoor ambient temperature of the air conditioner exceeds the target temperature of the air conditioner, so that the air conditioner maintains an operation state under a set energy consumption when the indoor ambient temperature of the air conditioner reaches the target temperature of the air conditioner. The specific functions and processes of the control unit 104 are also referred to in step S520.
The control unit 104 is specifically further configured to, if it is determined that the fourth indoor environment temperature of the air conditioner exceeds the target temperature of the air conditioner, control the on/off of the switch unit again so as to reduce the actual heat exchange area of the indoor heat exchanger, for example, to half of the set maximum heat exchange area, so as to maintain the air conditioner in the operating state under the set energy consumption when the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner. The specific functions and processes of the control unit 104 are also referred to in step S530.
Wherein, the controlling unit 104 controls the on/off of the switch unit again to reduce the actual heat exchange area of the indoor heat exchanger, and includes: the control unit 104 is specifically further configured to, in a case where the indoor heat exchanger includes a first heat exchanger and a second heat exchanger, and the switch unit includes a first two-way valve and a second two-way valve, control the first two-way valve to be closed and control the second two-way valve to be opened, so as to maintain the air conditioner in an operating state under the set energy consumption in a case where the indoor ambient temperature of the air conditioner reaches the target temperature of the air conditioner, and then return to continue to control at least one of the operating frequency of the compressor, the rotating speed of the indoor fan, the rotating speed of the outdoor fan, and re-on/off of the switch unit according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, so as to continue to maintain the air conditioner in an operating state under the set energy consumption in a case where the indoor ambient temperature of the air conditioner reaches the target temperature of the air conditioner.
Specifically, as shown in fig. 8, the control device for an air conditioner according to the present invention further includes: step 6, after the rotating speed of the indoor and outdoor fans of the air conditioner is reduced, the set time m is operated 0 Then, the current indoor environment temperature t after the rotating speed of the indoor and outdoor fans is reduced is judged 3 And a user set temperature t Is provided with The difference between, if still: the current indoor environment temperature t after the rotating speed of the indoor and outdoor fans is reduced in the refrigeration mode 3 User set temperature t Is provided with Not more than third preset temperature t Preset value 3 (or setting the temperature t by the user in the heating mode Is provided with Current indoor ambient temperature t after reduction of indoor and outdoor fan speed 3 Not more than third preset temperature t Preset value 3 ) And when the air conditioner is started, the two-way valve 1 is closed, the two-way valve 2 is opened, the heat exchange area of the indoor heat exchanger is reduced, the cold (or heat) output by the air conditioner can keep a relative balance position with the room load, the compressor in the air conditioner is prevented from being frequently started and stopped, and then the step 5 is returned.
Wherein, the inner and outer fan rotational speed can move simultaneously or reduce one and then reduce the other. The reduction in the rotation speed of the inner and outer fans is not uniform. The outdoor fan is firstly changed according to the frequencyThe wind gear is switched, for example, when the operation frequency is lower than 46Hz, the rotating speed of the external fan is switched from a high wind gear (780 rpm) to a low wind gear (600 rpm), and the current indoor environment temperature t after the rotating speed of the indoor and outdoor fans is reduced in the cooling mode 3 User set temperature t Is provided with Not more than third preset temperature t Preset value 3 (or setting the temperature t by the user in the heating mode Is provided with Current indoor ambient temperature t after reduction of indoor and outdoor fan speed 3 Not more than third preset temperature t Preset value 3 ) The outer fan speed is reduced to the lowest speed (500 rpm).
The rotating speed of the indoor fan is also required to be adjusted according to the temperature of the indoor heat exchanger, and the current indoor environment temperature t after the rotating speed of the indoor and outdoor fans is reduced in the refrigeration mode 3 User set temperature t Is provided with Not more than third preset temperature t Preset value 3 (or user-set temperature t in heating mode Is provided with Current indoor ambient temperature t after reduction of indoor and outdoor fan speed 3 Not more than third preset temperature t Preset value 3 ) Then, the rotating speed of the indoor fan is reduced according to the set rotating speed delta r (50 rpm) every t time (such as 40 s) until the current indoor environment temperature t is obtained after the rotating speed of the indoor and outdoor fans is reduced in the refrigeration mode 3 User set temperature t Is provided with Is greater than a third preset temperature t Preset value 3 (or user-set temperature t in heating mode Is provided with Current indoor ambient temperature t after reduction of indoor and outdoor fan speed 3 Is greater than a third preset temperature t Preset value 3 ) Or the indoor fan speed has been reduced to a minimum (350 rpm) and then the current indoor fan speed is maintained in operation. It should be noted that when the temperature of the indoor heat exchanger is lower (higher) than the set value (e.g. the set value is 2 ℃ during cooling and 56 ℃ during heating) during cooling, the rotating speed of the indoor fan can not be reduced, so as to avoid the problem of frosting when the temperature of the indoor heat exchanger is too low in the cooling mode, and avoid the too high pressure of the system where the air conditioner is located in the heating mode.
In the scheme of the invention, the main purpose is to avoid the problem that the air conditioner is frequently started and stopped after reaching the temperature set by a user in the later operation stage. In the related scheme, in the operation process of the air conditioner, when larger refrigerating and heating quantity is needed, the compressor is controlled to operate at a larger frequency, when the larger refrigerating and heating quantity is not needed, the compressor is controlled to operate at a smaller frequency, and when the ambient temperature in the refrigerating chamber is less than or equal to the set temperature (the ambient temperature in the heating chamber is greater than or equal to the set temperature), the control device is withdrawn, so that the problems solved by the two methods are different.
In some alternative embodiments, the indoor heat exchanger may be divided into multiple sections, and the area of the indoor heat exchanger may be adjusted by multiple two-way valves to accommodate the cooling (heating) requirements of rooms of different loads. The two-way valves are used for controlling the on-off of the refrigerant of the air conditioner in the heat exchange pipeline of the indoor heat exchanger, and the heat exchange area of the indoor heat exchanger can be switched more accurately by adopting the two-way valves for matching different use environments. When the indoor heat exchanger is not required to be completely put into use, the area of the heat exchanger through which the refrigerant flows is adjusted by controlling the opening and closing of the two-way valve.
According to the scheme of the invention, after the air conditioner runs for a long time, the cold (heat) output of the air conditioner can be maintained at a balance position with the room load, so that the problem that the comfortable experience of a user and the service life of the air conditioner are influenced due to large fluctuation of the indoor environment temperature caused by frequent startup and shutdown after the air conditioner reaches the temperature set by the user in the later running period is avoided, the comfortable experience of the user is favorably improved, and the service life of the air conditioner is prolonged.
Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the foregoing method, reference may be made to relevant descriptions in the foregoing embodiments for details that are not described in detail in the description of this embodiment, and further description is not provided herein.
By adopting the technical scheme of the invention, more than two indoor heat exchangers are arranged, and the switching units (such as two-way valves) are arranged on the refrigerant heat exchange pipelines of the more than two indoor heat exchangers, so that the actual heat exchanger areas of the more than two indoor heat exchangers can be adjusted through the on-off of the switching units; in the operation process of the air conditioner, the operation frequency of the compressor, the rotating speed of the indoor and outdoor fans and the on-off of the switch unit are controlled according to the difference value between the indoor environment temperature and the user set temperature, so that the air conditioner can respond in advance when the room temperature (namely the indoor environment temperature) is close to the user set temperature, and the air conditioner is prevented from being operated at a higher frequency for a long time to cause the room temperature to reach the set temperature quickly, so that the air conditioner is started and stopped frequently, the user experience is good, and the operation stability of the air conditioner is good.
According to an embodiment of the present invention, there is also provided an air conditioner corresponding to a control device of the air conditioner. The air conditioner may include: the control device of the air conditioner is described above.
Since the processing and functions of the air conditioner of this embodiment are basically corresponding to the embodiments, principles and examples of the aforementioned devices, the description of this embodiment is not given in detail, and reference may be made to the related descriptions in the aforementioned embodiments, which are not repeated herein.
By adopting the technical scheme of the invention, more than two indoor heat exchangers are arranged, and the switching units (such as two-way valves) are arranged on the refrigerant heat exchange pipelines of the more than two indoor heat exchangers, so that the actual heat exchanger areas of the more than two indoor heat exchangers can be adjusted through the on-off of the switching units; in the operation process of the air conditioner, the operation frequency of the compressor, the rotating speed of the indoor and outdoor fans and the on-off of the switch unit are controlled according to the difference value between the indoor environment temperature and the user set temperature, so that the air conditioner can respond in advance when the room temperature (namely the indoor environment temperature) is close to the user set temperature, the problem that the air conditioner is frequently started and stopped due to the fact that the room temperature rapidly reaches the set temperature due to the fact that the air conditioner operates at a high frequency for a long time is avoided, and the service life of the air conditioner is prolonged.
According to an embodiment of the present invention, there is also provided a storage medium corresponding to a control method of an air conditioner, the storage medium including a stored program, wherein when the program is executed, an apparatus where the storage medium is located is controlled to execute the control method of the air conditioner described above.
Since the processing and functions implemented by the storage medium of this embodiment substantially correspond to the embodiments, principles and examples of the foregoing method, reference may be made to relevant descriptions in the foregoing embodiments for details that are not described in detail in the description of this embodiment, and further description is not repeated here.
By adopting the technical scheme of the invention, more than two indoor heat exchangers are arranged, and the switching units (such as two-way valves) are arranged on the refrigerant heat exchange pipelines of the more than two indoor heat exchangers, so that the actual heat exchanger areas of the more than two indoor heat exchangers can be adjusted through the on-off of the switching units; in the operation process of the air conditioner, the operation frequency of the compressor, the rotating speed of the indoor and outdoor fans and the on-off of the switch unit are controlled according to the difference value between the indoor environment temperature and the user set temperature, so that the air conditioner can respond in advance when the room temperature (namely the indoor environment temperature) is close to the user set temperature, the air conditioner is prevented from operating at a higher frequency for a long time to cause the room temperature to reach the set temperature quickly, the air conditioner is prevented from being started and stopped frequently, and the comfort experience of a user is promoted.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (14)
1. A control method of an air conditioner, characterized in that the air conditioner comprises: the heat exchanger comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein an indoor fan is arranged at the indoor heat exchanger, and an outdoor fan is arranged at the outdoor heat exchanger; a switching unit is arranged on a refrigerant heat exchange pipeline of the indoor heat exchanger, and the actual heat exchange area of the indoor heat exchanger can be adjusted through the on-off of the switching unit; the control method of the air conditioner comprises the following steps:
under the condition that the air conditioner runs after being started, controlling the on-off of the switch unit so as to enable the actual heat exchange area of the indoor heat exchanger to be the set maximum heat exchange area;
acquiring the indoor environment temperature of the air conditioner, and acquiring the target temperature of the air conditioner;
and controlling at least one of the operation frequency of the compressor, the rotating speed of the indoor fan, the rotating speed of the outdoor fan and the switching on and off of the switch unit according to the indoor environment temperature of the air conditioner and the target temperature of the air conditioner, so that the air conditioner can maintain the operation state under the set energy consumption under the condition that the indoor environment temperature of the air conditioner reaches the target temperature of the air conditioner.
2. The control method of an air conditioner according to claim 1, wherein the number of the indoor heat exchangers is two or more; two or more indoor heat exchangers include: a first heat exchanger and a second heat exchanger; the switching unit includes: a first two-way valve and a second two-way valve; wherein,
the first heat exchanger and the second heat exchanger are arranged in series, the first two-way valve is arranged in a pipeline between the first heat exchanger and the second heat exchanger, and the second two-way valve is arranged between a common end between the first heat exchanger and the first two-way valve and one end of the second heat exchanger far away from the first two-way valve;
under the condition that the air conditioner runs after being started, the on-off of the switch unit is controlled, and the method comprises the following steps:
under the condition that the air conditioner runs after being started, controlling the first two-way valve to be opened and controlling the second two-way valve to be closed; and at the moment, the actual heat exchange area of the indoor heat exchanger is the sum of the heat exchange area of the first heat exchanger and the heat exchange area of the second heat exchanger.
3. The method for controlling an air conditioner according to claim 1 or 2, wherein the indoor ambient temperature of the air conditioner obtained when the indoor heat exchanger operates in a set maximum heat exchange area is taken as a first indoor ambient temperature of the air conditioner;
controlling at least one of an operation frequency of the compressor, a rotation speed of the indoor fan, a rotation speed of the outdoor fan, and re-on/off of the switching unit according to an indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, including:
determining an absolute value of a temperature difference value between a first indoor environment temperature of the air conditioner and a target temperature of the air conditioner, and recording the absolute value as a first temperature difference absolute value;
determining whether the first absolute value of the temperature difference is less than or equal to a first preset temperature;
recording the current running frequency of the compressor as a first frequency; if the absolute value of the first temperature difference is determined to be smaller than or equal to a first preset temperature, controlling the running frequency of the compressor to be reduced from the first frequency to a set frequency to obtain a second frequency; and controlling the compressor to operate at the second frequency for a set time.
4. The control method of an air conditioner according to claim 3, wherein the indoor ambient temperature of the air conditioner obtained after the compressor is operated at the second frequency for a set time is recorded as a second indoor ambient temperature of the air conditioner;
controlling at least one of an operation frequency of the compressor, a rotation speed of the indoor fan, a rotation speed of the outdoor fan, and re-on/off of the switching unit according to an indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, further comprising:
determining whether a second indoor ambient temperature of the air conditioner does not reach a target temperature of the air conditioner after controlling the compressor to operate at the second frequency for a set time;
if the second indoor environment temperature of the air conditioner is determined not to reach the target temperature of the air conditioner, controlling the running frequency of the compressor to recover to the first frequency from the second frequency, and controlling the compressor to run according to the first frequency;
if the second indoor environment temperature of the air conditioner is determined to reach the target temperature of the air conditioner, determining an absolute value of a temperature difference value between the second indoor environment temperature of the air conditioner and the target temperature of the air conditioner, and recording the absolute value as a second temperature difference absolute value;
determining whether the second absolute temperature difference is less than or equal to a second preset temperature;
if the second temperature difference absolute value is larger than a second preset temperature, controlling the compressor to operate according to the second frequency;
if the second temperature difference absolute value is determined to be smaller than or equal to a second preset temperature, controlling the running frequency of the compressor to be reduced from the second frequency to a set frequency to obtain a third frequency; and controlling the compressor to operate for a set time according to the third frequency.
5. The control method of an air conditioner according to claim 4, wherein the indoor ambient temperature of the air conditioner obtained after the compressor is operated at the third frequency for a set time is taken as a third indoor ambient temperature of the air conditioner;
controlling at least one of an operation frequency of the compressor, a rotation speed of the indoor fan, a rotation speed of the outdoor fan, and re-on/off of the switching unit according to an indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, further comprising:
after controlling the compressor to operate for a set time according to the third frequency, determining an absolute value of a temperature difference value between the ambient temperature in the third room of the air conditioner and the target temperature of the air conditioner, and recording the absolute value as a third temperature difference absolute value;
determining whether the third absolute value of the temperature difference is less than or equal to a third preset temperature;
if the third temperature difference absolute value is larger than a third preset temperature, controlling the compressor to operate according to the third frequency;
and if the third absolute temperature difference value is determined to be less than or equal to a third preset temperature, reducing the rotating speed of at least one of the indoor fan and the outdoor fan, and controlling the fan to operate for a set time according to the reduced rotating speed.
6. The method of claim 5, wherein the indoor ambient temperature of the air conditioner obtained after reducing the rotational speed of at least one of the indoor fan and the outdoor fan and controlling the fan to operate at the reduced rotational speed for a set time is taken as a fourth indoor ambient temperature of the air conditioner;
controlling at least one of an operation frequency of the compressor, a rotation speed of the indoor fan, a rotation speed of the outdoor fan, and re-on/off of the switching unit according to an indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, and further comprising:
after reducing the rotating speed of at least one of the indoor fan and the outdoor fan and controlling the fan to operate for a set time according to the reduced rotating speed, determining whether the fourth indoor environment temperature of the air conditioner exceeds the target temperature of the air conditioner;
if the fourth indoor environment temperature of the air conditioner is determined not to exceed the target temperature of the air conditioner, controlling the air conditioner to maintain the current operation mode;
if the fourth indoor environment temperature of the air conditioner is determined to exceed the target temperature of the air conditioner, the on-off of the switch unit is controlled again, so that the actual heat exchange area of the indoor heat exchanger is reduced;
wherein, the switching-on and switching-off of the switch unit is controlled again to make the actual heat exchange area of the indoor heat exchanger reduce, including:
and under the condition that the indoor heat exchanger comprises a first heat exchanger and a second heat exchanger and the switch unit comprises a first two-way valve and a second two-way valve, controlling the first two-way valve to be closed and controlling the second two-way valve to be opened.
7. A control device of an air conditioner, characterized in that the air conditioner comprises: the heat exchanger comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein an indoor fan is arranged at the indoor heat exchanger, and an outdoor fan is arranged at the outdoor heat exchanger; a switch unit is arranged on a refrigerant heat exchange pipeline of the indoor heat exchanger, and the actual heat exchange area of the indoor heat exchanger can be adjusted through the on-off of the switch unit; the control device of the air conditioner comprises:
the control unit is configured to control the on-off of the switch unit under the condition that the air conditioner runs after being started, so that the actual heat exchange area of the indoor heat exchanger is the set maximum heat exchange area;
an acquisition unit configured to acquire an indoor ambient temperature of the air conditioner and acquire a target temperature of the air conditioner;
the control unit is further configured to control at least one of an operation frequency of the compressor, a rotation speed of the indoor fan, a rotation speed of the outdoor fan, and re-on/off of the switching unit according to an indoor ambient temperature of the air conditioner and a target temperature of the air conditioner, so that the air conditioner maintains an operation state at a set energy consumption in a case where the indoor ambient temperature of the air conditioner reaches the target temperature of the air conditioner.
8. The control device of an air conditioner according to claim 7, wherein the number of the indoor heat exchangers is two or more; two or more indoor heat exchangers include: a first heat exchanger and a second heat exchanger; the switching unit includes: a first two-way valve and a second two-way valve; wherein,
the first heat exchanger and the second heat exchanger are arranged in series, the first two-way valve is arranged in a pipeline between the first heat exchanger and the second heat exchanger, and the second two-way valve is arranged between a common end between the first heat exchanger and the first two-way valve and one end of the second heat exchanger far away from the first two-way valve;
the control unit controls the on-off of the switch unit under the condition that the air conditioner runs after being started, and comprises the following components:
under the condition that the air conditioner runs after being started, controlling the first two-way valve to be opened and controlling the second two-way valve to be closed; and at the moment, the actual heat exchange area of the indoor heat exchanger is the sum of the heat exchange area of the first heat exchanger and the heat exchange area of the second heat exchanger.
9. The control device of an air conditioner according to claim 7 or 8, wherein the control unit is further configured to record an indoor ambient temperature of the air conditioner obtained when the indoor heat exchanger operates in a set maximum heat exchange area as a first indoor ambient temperature of the air conditioner;
the control unit controls at least one of the operation frequency of the compressor, the rotation speed of the indoor fan, the rotation speed of the outdoor fan, and the re-on/off of the switch unit according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, and includes:
determining an absolute value of a temperature difference value between a first indoor environment temperature of the air conditioner and a target temperature of the air conditioner, and recording the absolute value as a first temperature difference absolute value;
determining whether the first absolute temperature difference is less than or equal to a first preset temperature;
recording the current running frequency of the compressor as a first frequency; if the absolute value of the first temperature difference is determined to be smaller than or equal to a first preset temperature, controlling the running frequency of the compressor to be reduced from the first frequency to a set frequency to obtain a second frequency; and controlling the compressor to operate at the second frequency for a set time.
10. The control device of an air conditioner according to claim 9, wherein the control unit is further configured to register an indoor ambient temperature of the air conditioner, which is obtained after the compressor is operated at the second frequency for a set time, as a second indoor ambient temperature of the air conditioner;
the control unit controls at least one of the operation frequency of the compressor, the rotation speed of the indoor fan, the rotation speed of the outdoor fan and the re-on/off of the switch unit according to the indoor environment temperature of the air conditioner and the target temperature of the air conditioner, and further includes:
determining whether a second indoor ambient temperature of the air conditioner does not reach a target temperature of the air conditioner after controlling the compressor to operate at the second frequency for a set time;
if the second indoor environment temperature of the air conditioner is determined not to reach the target temperature of the air conditioner, controlling the running frequency of the compressor to recover from the second frequency to the first frequency, and controlling the compressor to run according to the first frequency;
if the second indoor environment temperature of the air conditioner is determined to reach the target temperature of the air conditioner, determining an absolute value of a temperature difference value between the second indoor environment temperature of the air conditioner and the target temperature of the air conditioner, and recording the absolute value as a second temperature difference absolute value;
determining whether the second absolute value of the temperature difference is less than or equal to a second preset temperature;
if the second temperature difference absolute value is larger than a second preset temperature, controlling the compressor to operate according to the second frequency;
if the second temperature difference absolute value is determined to be smaller than or equal to a second preset temperature, controlling the running frequency of the compressor to be reduced from the second frequency to a set frequency to obtain a third frequency; and controlling the compressor to operate for a set time according to the third frequency.
11. The control device of an air conditioner according to claim 10, wherein said control unit is further configured to record an indoor ambient temperature of said air conditioner obtained after a set time of operation of said compressor at said third frequency as a third indoor ambient temperature of said air conditioner;
the control unit controls at least one of the operating frequency of the compressor, the rotational speed of the indoor fan, the rotational speed of the outdoor fan, and the re-on/off of the switching unit according to the indoor ambient temperature of the air conditioner and the target temperature of the air conditioner, and further includes:
after controlling the compressor to operate for a set time according to the third frequency, determining an absolute value of a temperature difference value between the ambient temperature in the third chamber of the air conditioner and the target temperature of the air conditioner, and recording the absolute value as a third temperature difference absolute value;
determining whether the third absolute value of the temperature difference is less than or equal to a third preset temperature;
if the third absolute temperature difference value is larger than a third preset temperature, controlling the compressor to operate at the third frequency;
and if the third absolute temperature difference value is determined to be less than or equal to a third preset temperature, reducing the rotating speed of at least one of the indoor fan and the outdoor fan, and controlling the fan to operate for a set time according to the reduced rotating speed.
12. The control device of an air conditioner according to claim 11, wherein the control unit is further configured to designate an indoor ambient temperature of the air conditioner, which is obtained after reducing a rotation speed of at least one of the indoor fan and the outdoor fan and controlling the fan to operate at the reduced rotation speed for a set time, as a fourth indoor ambient temperature of the air conditioner;
the control unit controls at least one of the operation frequency of the compressor, the rotation speed of the indoor fan, the rotation speed of the outdoor fan and the re-on/off of the switch unit according to the indoor environment temperature of the air conditioner and the target temperature of the air conditioner, and further includes:
after reducing the rotating speed of at least one of the indoor fan and the outdoor fan and controlling the fan to operate for a set time according to the reduced rotating speed, determining whether the fourth indoor environment temperature of the air conditioner exceeds the target temperature of the air conditioner;
if the fourth indoor environment temperature of the air conditioner is determined not to exceed the target temperature of the air conditioner, controlling the air conditioner to maintain the current operation mode;
if the fourth indoor environment temperature of the air conditioner is determined to exceed the target temperature of the air conditioner, the on-off of the switch unit is controlled again, so that the actual heat exchange area of the indoor heat exchanger is reduced;
wherein, the control unit controls the on-off of the switch unit again to reduce the actual heat exchange area of the indoor heat exchanger, and the control unit comprises:
and under the condition that the indoor heat exchanger comprises a first heat exchanger and a second heat exchanger and the switch unit comprises a first two-way valve and a second two-way valve, controlling the first two-way valve to be closed and controlling the second two-way valve to be opened.
13. An air conditioner, comprising: the control device of the air conditioner according to any one of claims 7 to 12.
14. A storage medium characterized by comprising a stored program, wherein an apparatus in which the storage medium is located is controlled to execute the control method of the air conditioner according to any one of claims 1 to 6 when the program is executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211640046.0A CN115978732A (en) | 2022-12-20 | 2022-12-20 | Control method and device of air conditioner, air conditioner and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211640046.0A CN115978732A (en) | 2022-12-20 | 2022-12-20 | Control method and device of air conditioner, air conditioner and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115978732A true CN115978732A (en) | 2023-04-18 |
Family
ID=85964174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211640046.0A Pending CN115978732A (en) | 2022-12-20 | 2022-12-20 | Control method and device of air conditioner, air conditioner and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115978732A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106765915A (en) * | 2016-12-02 | 2017-05-31 | 青岛海尔空调器有限总公司 | Air conditioner energy saving control method |
| CN108344121A (en) * | 2018-01-02 | 2018-07-31 | 珠海格力电器股份有限公司 | Air conditioner control method and air conditioner |
| CN110118422A (en) * | 2018-02-07 | 2019-08-13 | 台达电子工业股份有限公司 | Cold air conditioning system and its operating method |
| CN111706974A (en) * | 2020-06-05 | 2020-09-25 | 广东美的制冷设备有限公司 | Control method of air conditioner, air conditioner and storage medium |
| CN111780325A (en) * | 2020-06-17 | 2020-10-16 | 珠海格力电器股份有限公司 | Control method for air conditioner and air conditioner using same |
| CN112325456A (en) * | 2020-10-29 | 2021-02-05 | 珠海格力电器股份有限公司 | Method and device for controlling temperature of evaporator tube |
| CN112880144A (en) * | 2021-01-29 | 2021-06-01 | 青岛海尔智能技术研发有限公司 | Control method and control device for double-refrigeration type air conditioner and double-refrigeration type air conditioner |
| CN113324325A (en) * | 2021-05-12 | 2021-08-31 | Tcl空调器(中山)有限公司 | Accurate temperature control method and device of air conditioner and air conditioner |
| WO2022160655A1 (en) * | 2021-02-01 | 2022-08-04 | 青岛海尔空调器有限总公司 | Air conditioner control method and apparatus, and air conditioner |
| US20220333811A1 (en) * | 2021-04-20 | 2022-10-20 | Haier Us Appliance Solutions, Inc. | System and method for operating an air conditioner unit |
-
2022
- 2022-12-20 CN CN202211640046.0A patent/CN115978732A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106765915A (en) * | 2016-12-02 | 2017-05-31 | 青岛海尔空调器有限总公司 | Air conditioner energy saving control method |
| CN108344121A (en) * | 2018-01-02 | 2018-07-31 | 珠海格力电器股份有限公司 | Air conditioner control method and air conditioner |
| CN110118422A (en) * | 2018-02-07 | 2019-08-13 | 台达电子工业股份有限公司 | Cold air conditioning system and its operating method |
| CN111706974A (en) * | 2020-06-05 | 2020-09-25 | 广东美的制冷设备有限公司 | Control method of air conditioner, air conditioner and storage medium |
| CN111780325A (en) * | 2020-06-17 | 2020-10-16 | 珠海格力电器股份有限公司 | Control method for air conditioner and air conditioner using same |
| CN112325456A (en) * | 2020-10-29 | 2021-02-05 | 珠海格力电器股份有限公司 | Method and device for controlling temperature of evaporator tube |
| CN112880144A (en) * | 2021-01-29 | 2021-06-01 | 青岛海尔智能技术研发有限公司 | Control method and control device for double-refrigeration type air conditioner and double-refrigeration type air conditioner |
| WO2022160655A1 (en) * | 2021-02-01 | 2022-08-04 | 青岛海尔空调器有限总公司 | Air conditioner control method and apparatus, and air conditioner |
| US20220333811A1 (en) * | 2021-04-20 | 2022-10-20 | Haier Us Appliance Solutions, Inc. | System and method for operating an air conditioner unit |
| CN113324325A (en) * | 2021-05-12 | 2021-08-31 | Tcl空调器(中山)有限公司 | Accurate temperature control method and device of air conditioner and air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112484239B (en) | Air conditioner defrosting method and air conditioner | |
| CN110594992A (en) | Air conditioner preheating control method and device and air conditioner | |
| CN107763792B (en) | Control method of multi-connected air conditioning unit | |
| CN110260492B (en) | Fan and compressor control method under refrigeration mode of variable frequency air conditioner | |
| CN109539380B (en) | Method for controlling frequency of compressor of heat pump water heater | |
| CN110822676B (en) | Control method, control device, air conditioner, and computer-readable storage medium | |
| CN113739344B (en) | Control method of internal expansion valve, air conditioner and computer readable storage medium | |
| CN112361537B (en) | Multi-split air conditioning system and oil return control method and device thereof, storage medium and processor | |
| CN111765599A (en) | Optimization method of air conditioner control strategy, processor and memory | |
| WO2016016918A1 (en) | Air conditioning device | |
| CN113587405A (en) | Air conditioner control method and system based on temperature correction | |
| CN113865059B (en) | Heating operation control method for multi-split air conditioner | |
| CN115978732A (en) | Control method and device of air conditioner, air conditioner and storage medium | |
| CN114791151B (en) | Control method and device for electronic expansion valve of air conditioner, air conditioner and storage medium | |
| CN112797570B (en) | Defrosting control method, defrosting device and multi-connected air conditioning system | |
| CN113465185B (en) | Heat pump initial frequency control method and system and air source heat pump | |
| JPH10148378A (en) | Air conditioner | |
| CN114322220A (en) | Air conditioning device and control method thereof | |
| CN111721034A (en) | Variable-frequency efficient water source heat pump system and implementation method thereof | |
| WO2023190302A1 (en) | Air conditioner | |
| CN114719392B (en) | Automatic cleaning method and device for air conditioner, air conditioner and storage medium | |
| CN112682922B (en) | Heating control method of multi-connected air conditioner | |
| CN114992818B (en) | Air conditioner control method and device, air conditioner and storage medium | |
| CN117367026B (en) | Temperature control method, device, electronic equipment and storage medium | |
| CN116007144B (en) | Air conditioner control method and device, air conditioner and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |