CN115704598A - Multi-split air conditioner, control method thereof and computer readable storage medium - Google Patents

Multi-split air conditioner, control method thereof and computer readable storage medium Download PDF

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Publication number
CN115704598A
CN115704598A CN202110921281.4A CN202110921281A CN115704598A CN 115704598 A CN115704598 A CN 115704598A CN 202110921281 A CN202110921281 A CN 202110921281A CN 115704598 A CN115704598 A CN 115704598A
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China
Prior art keywords
target
preset
indoor unit
indoor
air conditioner
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CN202110921281.4A
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Chinese (zh)
Inventor
朱声浩
张�浩
李健锋
黎顺全
王正兴
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GD Midea Air Conditioning Equipment Co Ltd
Midea Group Wuhan HVAC Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
Midea Group Wuhan HVAC Equipment Co Ltd
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Priority to CN202110921281.4A priority Critical patent/CN115704598A/en
Publication of CN115704598A publication Critical patent/CN115704598A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a control method of a multi-split air conditioner, which comprises the following steps: when the multi-split air conditioner is in refrigerating operation, acquiring the indoor environment humidity of the space where the target indoor unit is located; the target indoor unit is an indoor unit of which the preset wind sensing mode is opened in the at least two indoor units, and the air outlet speed of the target indoor unit in the preset wind sensing mode is smaller than the preset air speed; determining a target superheat degree of the target indoor unit according to the indoor environment humidity; and controlling a target electronic expansion valve to adjust the opening degree according to the target superheat degree, wherein the target electronic expansion valve is an electronic expansion valve in the target indoor unit. The invention also discloses a multi-split air conditioner and a computer readable storage medium. The invention aims to realize effective consideration of condensation prevention and refrigeration effect when the multi-split air conditioner is started without a wind sense function.

Description

Multi-split air conditioner, control method thereof and computer readable storage medium
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to a method for controlling a multi-split air conditioner, and a computer-readable storage medium.
Background
The multi-split air conditioner generally has one outdoor unit connected to more than one indoor unit. With the development of economic technology, the application of the multi-split air conditioner is more and more extensive, and the performance requirements of users on the multi-split air conditioner are continuously improved.
At present, when an indoor unit of a multi-split air conditioner is started to have a no-wind-sense function, an outdoor unit generally can adjust frequency to operate, however, when part of the indoor units need no-wind-sense operation, and the other part of the indoor units need normal refrigeration, the indoor units which operate without wind-sense are prone to generating condensation due to too high frequency of the outdoor unit, and the indoor units which need normal refrigeration are poor in refrigeration effect due to too low frequency of the outdoor unit. Therefore, the condensation prevention and the refrigeration effect cannot be effectively considered in the regulation and control process of the prior multi-split air conditioner after the non-wind-sensing function is started.
Disclosure of Invention
The invention mainly aims to provide a control method of a multi-split air conditioner, the multi-split air conditioner and a computer readable storage medium, and aims to effectively give consideration to condensation prevention and refrigeration effects when the multi-split air conditioner is started without a wind-sensing function.
In order to achieve the above object, the present invention provides a method for controlling a multi-split air conditioner, where the multi-split air conditioner includes a compressor and at least two indoor units, the compressor is connected to each of the indoor units, and the method for controlling the multi-split air conditioner includes the following steps:
when the multi-split air conditioner is in refrigerating operation, acquiring the indoor environment humidity of the space where the target indoor unit is located; the target indoor unit is an indoor unit of which the preset wind sensing mode is opened in the at least two indoor units, and the air outlet speed of the target indoor unit in the preset wind sensing mode is smaller than the preset air speed;
determining a target superheat degree of the target indoor unit according to the indoor environment humidity;
and controlling a target electronic expansion valve to adjust the opening degree according to the target superheat degree, wherein the target electronic expansion valve is an electronic expansion valve in the target indoor unit.
Optionally, the control method of the multi-split air conditioner further comprises:
when the multi-split air conditioner is in refrigerating operation, if the target indoor unit enters the preset air sense mode, controlling the target electronic expansion valve to operate according to a preset superheat degree and executing the step of acquiring the indoor environment humidity of the space where the target indoor unit is located;
after the step of determining the target superheat degree of the target indoor unit according to the indoor environment humidity, the method further comprises the following steps:
when the operation of the multi-split air conditioner reaches a first preset condition, executing the step of controlling a target electronic expansion valve to adjust the opening degree according to the target superheat degree;
wherein the preset superheat degree is less than or equal to the target superheat degree.
Optionally, the first preset condition comprises at least one of:
the duration of the target indoor unit starting the preset wind sensation mode is longer than the preset duration;
the evaporation temperature of the target indoor unit is less than the target evaporation temperature, or the evaporation pressure of the target indoor unit is less than the target evaporation pressure;
the exhaust temperature of the compressor is lower than the preset exhaust temperature;
and the exhaust superheat degree of the compressor is less than the preset exhaust superheat degree.
Optionally, after the step of obtaining the indoor environment humidity of the space where the target indoor unit is located, the method further includes:
determining the target evaporation temperature or the target evaporation pressure according to the indoor environment humidity;
the target evaporation temperature or the target evaporation pressure tends to increase with an increase in the indoor ambient humidity.
Optionally, after the step of controlling the target electronic expansion valve to adjust the opening degree according to the target superheat degree, the method further comprises:
and when the running of the multi-split air conditioner reaches a second preset condition, controlling the target electronic expansion valve to run according to a preset superheat degree, wherein the preset superheat degree is less than or equal to the target superheat degree.
Optionally, the second preset condition comprises at least one of:
the target indoor unit exits the preset wind sensation mode;
the exhaust temperature of the compressor is greater than or equal to a preset exhaust temperature;
and the discharge superheat degree of the compressor is greater than or equal to a preset discharge superheat degree.
Optionally, while or after the step of obtaining the indoor environment humidity of the space where the target indoor unit is located is executed, the method further includes:
acquiring the indoor environment temperature of the space where the target indoor unit is located;
when the indoor environment temperature is less than or equal to a first preset temperature threshold and the indoor environment humidity is less than or equal to a first preset humidity threshold, controlling a target indoor fan to operate at a rotating speed less than a set rotating speed;
when the indoor environment temperature is greater than a second preset temperature threshold value or the indoor environment humidity is greater than a second preset humidity threshold value, adjusting the running rotating speed of the target indoor fan according to the indoor environment temperature and the set temperature of the target indoor unit;
the target indoor fan is a fan in the target indoor unit, the second preset temperature threshold is greater than or equal to the first preset temperature threshold, and the second preset humidity threshold is greater than or equal to the first preset humidity threshold.
Optionally, while or after the step of obtaining the indoor environment humidity of the space where the target indoor unit is located is executed, the method further includes:
acquiring the indoor environment temperature of the space where the target indoor unit is located;
when the indoor environment temperature is less than or equal to a first preset temperature threshold and the indoor environment humidity is less than or equal to a first preset humidity threshold, controlling the target air deflector to operate in a first air guiding state;
when the indoor environment temperature is greater than a second preset temperature threshold value or the indoor environment humidity is greater than a second preset humidity threshold value, controlling the target air deflector to operate in a second air guiding state;
the target air deflector is arranged at an air outlet of the target indoor unit and provided with a plurality of air dispersing holes, all air in the air duct of the target indoor unit enters the room through the air dispersing holes in the first air guiding state, a gap is formed between the target air deflector and the air outlet in the second air guiding state, one part of air in the air duct of the target indoor unit enters the room through the air dispersing holes, and the other part of air enters the room from the gap;
the second preset temperature threshold is greater than or equal to the first preset temperature threshold, and the second preset humidity threshold is greater than or equal to the first preset humidity threshold.
In addition, in order to achieve the above object, the present application also provides a multi-split air conditioner including:
at least two indoor units;
a compressor connected to each of the indoor units;
the controlling means, indoor set and compressor all with controlling means connects, controlling means includes: the control method comprises the steps of realizing the control method of the multi-split air conditioner according to any one of the above items when the control program of the multi-split air conditioner is executed by the processor.
In addition, in order to achieve the above object, the present application also proposes a computer-readable storage medium having a control program of a multi-split air conditioner stored thereon, which when executed by a processor, implements the steps of the control method of the multi-split air conditioner as set forth in any one of the above.
The invention provides a control method of a multi-split air conditioner, which is based on the multi-split air conditioner comprising a compressor and at least two indoor units connected with the compressor, and is characterized in that when a target indoor unit of a preset wind sensation mode with low wind speed needs to be started during the refrigerating operation of the multi-split air conditioner, the opening of an electronic expansion valve of the target indoor unit is adjusted based on the superheat degree determined by the ambient humidity of the space where the target indoor unit is located, and the opening of the electronic expansion valve is adaptive to the ambient humidity adjustment based on the superheat degree, so that the flow of a refrigerant flowing into the target indoor unit can be adapted to the indoor humidity condition, condensation of the target indoor unit is effectively avoided, the change of the flow of the refrigerant flowing into the target indoor unit can compensate the flow of the refrigerant of other indoor units, the refrigerating effect of other indoor units cannot be influenced in the process of starting the preset wind sensation mode of the target indoor unit, and the effective compromise between the condensation prevention and the refrigerating effect can be realized when the multi-split air conditioner is started without the wind sensation function.
Drawings
Fig. 1 is a schematic diagram of a hardware structure involved in the operation of an embodiment of the multiple on-line air conditioner of the present invention;
fig. 2 is a schematic flowchart illustrating a control method of a multi-split air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic flowchart illustrating a control method of a multi-split air conditioner according to another embodiment of the present invention;
fig. 4 is a schematic flowchart illustrating a control method of a multi-split air conditioner according to another embodiment of the present invention;
FIG. 5 is a flowchart illustrating a control method of a multi-split air conditioner according to still another embodiment of the present invention;
fig. 6 is a flowchart illustrating a control method of a multi-split air conditioner according to still another embodiment of the invention.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: based on a multi-split air conditioner provided with a compressor and at least two indoor units connected with the compressor, when the multi-split air conditioner is in refrigeration operation, acquiring the indoor environment humidity of the space where a target indoor unit is located; the target indoor unit is an indoor unit of which the preset wind sensing mode is opened in the at least two indoor units, and the air outlet speed of the target indoor unit in the preset wind sensing mode is smaller than the preset air speed; determining a target superheat degree of the target indoor unit according to the indoor environment humidity; and controlling a target electronic expansion valve to adjust the opening degree according to the target superheat degree, wherein the target electronic expansion valve is an electronic expansion valve in the target indoor unit.
In the prior art, when the indoor unit of the multi-split air conditioner is started to have a no-wind-sense function, the outdoor unit generally can adjust the frequency to operate, however, when part of the indoor units need to operate without wind-sense and the other part of the indoor units need to normally refrigerate, the outdoor unit has too high frequency, which can cause the indoor unit which operates without wind-sense to easily generate condensation, and the outdoor unit has too low frequency, which can cause the indoor unit which needs normal refrigeration to have poor refrigeration effect. Therefore, the condensation prevention and the refrigeration effect cannot be effectively considered in the regulation and control process of the prior multi-split air conditioner after the non-wind-sensing function is started.
The invention provides the solution, and aims to realize effective consideration of condensation prevention and refrigeration effect when the multi-split air conditioner is started without an air-sense function.
The embodiment of the invention provides a multi-split air conditioner.
Specifically, in this embodiment, referring to fig. 1, the multi-split air conditioner includes a compressor 1, at least two indoor units 2, and a control device, where the compressor 1 is connected to each of the indoor units 2, and both the compressor 1 and each of the indoor units 2 are connected to the control device. At least two indoor units 2 are arranged in parallel. In this embodiment, the number of the indoor units 2 is 3, and in other embodiments, the number of the indoor units 2 may also be set to be a greater or smaller number, such as 2, 4, 5, etc., according to actual requirements. Different indoor units 2 are distributed in different spatial areas.
Each indoor unit 2 comprises an indoor heat exchanger and an electronic expansion valve connected with the indoor heat exchanger in series, and the electronic expansion valve can be used for adjusting the refrigerant flow of the indoor heat exchanger connected with the indoor heat exchanger in series. Specifically, since the indoor units 2 are arranged in parallel, the refrigerant flow of the indoor heat exchangers connected in series can be synchronously influenced while the electronic expansion valve adjusts the refrigerant flow of the other indoor heat exchangers connected in parallel. For example, when the electronic expansion valve decreases the opening degree to decrease the flow rate of the indoor heat exchangers connected in series, the refrigerant flow rate of the other indoor heat exchangers connected in parallel to the other indoor heat exchanger is increased without changing the opening degree of the electronic expansion valve of the other indoor unit 2.
Specifically, each indoor unit 2 may further include an indoor fan disposed corresponding to the indoor heat exchanger, when the indoor fan is turned on, the air in the space where the indoor unit 2 is located may be driven to enter the indoor unit 2 and exchange heat with the corresponding indoor heat exchanger, and the heat-exchanged air is sent to the space where the indoor unit 2 is located.
Further, at least one humidity sensor 3 may be correspondingly disposed on each indoor unit 2, so as to detect the indoor ambient humidity of the space where each indoor unit 2 is located. Humidity sensor 3 can be connected with controlling means, and controlling means can acquire the humidity data that humidity sensor 3 detected.
Further, the multi-split air conditioner may be further provided with a first temperature sensor 4 for detecting a discharge temperature of the compressor 1. Specifically, the first temperature sensor 4 may be provided at an exhaust port of the compressor 1. The first temperature sensor 4 may be connected to a control device, and the control device may acquire temperature data detected by the first temperature sensor 4.
Further, the multi-split air conditioner may be further provided with more than one second temperature sensor 5 for detecting the evaporation temperature of the indoor heat exchanger. Specifically, at least one second temperature sensor 5 is provided in each indoor unit 2. The second temperature sensor 5 may be provided in the middle of the coil of the indoor heat exchanger. The second temperature sensor 5 may be connected to a control device, and the control device may acquire temperature data detected by the second temperature sensor 5.
Further, in an embodiment of the present invention, referring to fig. 1, a control apparatus of a multi-split air conditioner includes: a processor 1001 (e.g., CPU), memory 1002, and the like. The processor 1001 and the memory 1002 are connected by a communication bus. The memory 1002 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1002 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration of the device shown in fig. 1 is not intended to be limiting of the device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a control program of the multi-split air conditioner may be included in a memory 1002, which is a computer-readable storage medium. In the apparatus shown in fig. 1, the processor 1001 may be configured to call a control program of the multi-split air conditioner stored in the memory 1002 and perform operations of relevant steps of a control method of the multi-split air conditioner in the following embodiments.
The embodiment of the invention also provides a control method of the multi-split air conditioner, which is applied to control the multi-split air conditioner.
Referring to fig. 2, an embodiment of a method for controlling a multi-split air conditioner of the present application is provided. In this embodiment, the method for controlling a multi-split air conditioner includes:
s10, when the multi-split air conditioner is in refrigerating operation, acquiring the indoor environment humidity of the space where the target indoor unit is located; the target indoor unit is an indoor unit of which the preset wind sensing mode is opened in the at least two indoor units, and the wind outlet speed of the target indoor unit in the preset wind sensing mode is less than the preset wind speed;
and in the process of the multi-split air-conditioning cooling operation, at least one indoor unit in all the indoor units of the multi-split air conditioner is started and performs cooling operation. Specifically, a part of indoor units may be in cooling operation, and another part of indoor units may be off, or all indoor units may be in cooling operation, and specifically, the operation may be based on the actual cooling requirement of the space where the indoor units are located.
The target indoor unit is specifically an indoor unit which is in an opening state and is in a refrigeration operation state, and a preset wind sensation mode is opened. Specifically, in the process of multi-split air-conditioning cold operation, if an opening instruction of a preset wind sensation mode is received, the indoor unit receiving the opening instruction of the preset wind sensation mode can be determined as a target indoor unit.
In the process of operating the target indoor unit in the preset wind sensing mode, the indoor environment humidity of the space where the target indoor unit is located can be detected in real time or at intervals of set duration. The indoor environment humidity of the space where the target indoor unit is located can be detected through a humidity sensor arranged on the target indoor unit.
Specifically, when the number of the target indoor units is more than one, the indoor environment humidity of the space where each target indoor unit is located can be detected respectively.
The preset wind speed can be a parameter configured by default in the system or a parameter set by a user. The air outlet speed is lower than the preset air speed, which indicates that the air outlet speed of the target indoor unit is lower, and the target indoor unit needs low air speed air supply under the preset wind sensing mode so as to meet the comfort of users in the space where the target indoor unit is located. The preset wind sensation mode can be started by a user inputting a control command, and can also be started when the indoor unit monitors that the scene parameters of the space where the indoor unit is located reach a preset state. In this embodiment, the preset wind sensation mode is a no-wind sensation mode.
Step S20, determining a target superheat degree of the target indoor unit according to the indoor environment humidity;
the target superheat degree is a target value to be reached by a temperature difference between a refrigerant outlet temperature and a refrigerant inlet temperature of an indoor heat exchanger in the target indoor unit. When the refrigerant outlet temperature of the indoor heat exchanger is defined as T2B and the refrigerant inlet temperature of the indoor heat exchanger is defined as T2A, the superheat degree SH = T2B-T2A, and the target superheat degree is defined as the target value of SH.
Different indoor ambient humidity corresponds to different target superheat degrees. Specifically, the target superheat degree is increased as the indoor ambient humidity is increased.
The corresponding relation between the indoor environment humidity and the target superheat degree can be preset and can be in the forms of a calculation formula, a mapping relation and the like. Based on the correspondence, a target superheat degree corresponding to the current indoor ambient humidity can be determined. For example, a calculation formula between the humidity and the superheat degree can be preset, and the target superheat degree corresponding to the target indoor unit can be calculated by substituting the indoor environment humidity of the current target indoor unit into the calculation formula; or, a mapping table between the humidity and the superheat degree can be preset, the mapping table is inquired according to the indoor environment humidity of the current target indoor unit, and the result obtained by matching can be used as the target superheat degree corresponding to the target indoor unit.
When the number of the target indoor units is more than one, namely the number of the indoor units which start the preset air induction mode is more than one, the target superheat degree corresponding to each target indoor unit can be determined according to the indoor environment humidity corresponding to each target indoor unit. Because the humidity conditions of the spaces where different target indoor units are located are different, the target superheat degrees corresponding to different target indoor units can be different.
Further, the correspondence between the humidity and the superheat degree corresponding to each target indoor unit may be the same or different. For example, a first preset corresponding relationship between the humidity and the degree of superheat may be preset, and the target degree of superheat corresponding to each target indoor unit may be determined based on the first preset corresponding relationship. For another example, more than one second preset corresponding relationship between the humidity and the superheat degree may be preset, and different second preset corresponding relationships may be associated with different indoor fan rotation speeds, based on which, the fan rotation speed in each target indoor unit may be respectively obtained, and the target superheat degree corresponding to the indoor ambient humidity of the target indoor unit is determined based on the obtained second preset corresponding relationship associated with the fan rotation speed.
And S30, controlling a target electronic expansion valve to adjust the opening degree according to the target superheat degree, wherein the target electronic expansion valve is an electronic expansion valve in the target indoor unit.
Specifically, the opening degree of the electronic expansion valve in the target indoor unit is adjusted by taking the target superheat degree as a target, so that the flow of the refrigerant in the indoor heat exchanger in the target indoor unit is adjusted, and the actual superheat degree of the indoor heat exchanger in the target indoor unit reaches the target superheat degree.
When the number of the target indoor units is more than one, the electronic expansion valve in each target indoor unit is respectively controlled to adjust the opening according to the target superheat degree corresponding to each target indoor unit. For example, any two indoor units of more than one target indoor unit are respectively defined as a first indoor unit and a second indoor unit, the target superheat degree corresponding to the first indoor unit is a first superheat degree, the target superheat degree corresponding to the second indoor unit is a second superheat degree, and then an electronic expansion valve in the first indoor unit is controlled to adjust the opening degree according to the first superheat degree so that the actual superheat degree of an indoor heat exchanger in the first indoor unit reaches the first superheat degree; and controlling an electronic expansion valve in the second indoor unit to adjust the opening according to the second superheat degree so as to enable the actual opening of the indoor heat exchanger in the second indoor unit to reach the second superheat degree.
Specifically, all indoor units of the multi-split air conditioner which are currently in an open state except the target indoor unit are defined as other indoor units, and in the process of controlling the target electronic expansion valve to adjust the opening degree according to the target superheat degree, the electronic expansion valves in the other indoor units can be controlled to adjust the opening degree according to the preset superheat degree.
The control method of the multi-split air conditioner provided by the embodiment of the invention is based on the multi-split air conditioner comprising a compressor and at least two indoor units connected with the compressor, and is characterized in that when a target indoor unit of a preset air-sensitive mode with low wind speed needs to be opened during the refrigerating operation of the multi-split air conditioner, the opening of an electronic expansion valve of the target indoor unit is adjusted based on the superheat degree determined by the ambient humidity of the space where the target indoor unit is located, and based on the adjustment, the opening of the electronic expansion valve is suitable for the ambient humidity adjustment, so that the flow of a refrigerant flowing into the target indoor unit can be adapted to the indoor humidity condition, the target indoor unit is effectively prevented from generating condensation, the change of the flow of the refrigerant flowing into the target indoor unit can compensate the flow of the refrigerant of other indoor units, the refrigerating effect of other indoor units can not be influenced in the process of opening the preset air-sensitive mode of the target indoor unit, and the effective consideration of the condensation prevention and the refrigerating effect can be realized when the multi-split air conditioner is opened without the air-sensitive function.
In addition, the opening degree of the electronic expansion valve in the target indoor unit is adjusted in the above mode, so that the frequency adjustment of the compressor can be reduced or even avoided, the influence of the frequency adjustment of the compressor on the refrigeration effect of other indoor units which are in an opening state but not in a preset wind sensation mode is reduced, the low-wind-speed wind sensation requirement of the space where the target indoor unit is located is met, and meanwhile the refrigeration effect of other spaces is maintained.
In addition, when the number of the indoor units in an open state in the multi-split air conditioner is one, and the indoor units are opened in a preset wind sensing mode, the output capacity of the multi-split air conditioner compressor is generally high, so that even if the compressor operates at the lowest frequency, the outlet air temperature of the target indoor unit is still low.
Further, based on the above embodiment, another embodiment of the control method of the multi-split air conditioner is provided. In this embodiment, referring to fig. 3, the method for controlling a multi-split air conditioner may further include the following steps:
step S100, when the multi-split air conditioner is in refrigerating operation, if the target indoor unit enters the preset wind sensation mode, controlling the target electronic expansion valve to operate according to a preset superheat degree and executing the step of acquiring the indoor environment humidity of the space where the target indoor unit is located;
step S20, determining a target superheat degree of the target indoor unit according to the indoor environment humidity;
step S300, when the running of the multi-split air conditioner reaches a first preset condition, executing the step of controlling a target electronic expansion valve to adjust the opening degree according to the target superheat degree; wherein the preset superheat degree is less than or equal to the target superheat degree.
The first preset condition is specifically a condition which is required to be achieved by the preset operation parameters of the air conditioner or the environmental parameters of the environment where the air conditioner is located when the target indoor unit has a condensation risk.
The preset superheat degree is a preset target value of the superheat degree of the indoor heat exchanger, which aims at achieving temperature reduction in the preset wind sensation mode.
And adjusting the opening degree of the electronic expansion valve according to the preset superheat degree so as to enable the actual superheat degree of the indoor heat exchanger in the target indoor unit to reach the preset superheat degree.
The larger the target value of the superheat degree of the indoor heat exchanger is, the smaller the opening degree of the electronic expansion valve is; conversely, the smaller the target value of the degree of superheat of the indoor heat exchanger, the larger the opening degree of the electronic expansion valve. Based on the control method, the opening degree of the electronic expansion valve is controlled to be larger than or equal to the opening degree of the electronic expansion valve when the electronic expansion valve is controlled to operate according to the target superheat degree when the electronic expansion valve is controlled to operate according to the preset superheat degree.
In this embodiment, at the initial stage when the target indoor unit enters the preset air-sensitive mode, the electronic expansion valve is controlled to operate according to a smaller preset superheat degree, which is beneficial to ensuring that the air conditioner can achieve rapid reduction of the indoor environment temperature with higher refrigeration efficiency, and then the target electronic expansion valve is controlled to operate by switching to a larger target superheat degree, the increase of the superheat degree can lead to the reduction of the opening degree of the target electronic expansion valve, the reduction of the opening degree of the target electronic expansion valve can lead to the reduction of the refrigerant quantity in the target indoor unit, and the target indoor unit is prevented from being condensed due to too low outlet air temperature, so that the condensation problem of the target indoor unit in the preset air-sensitive mode is prevented on the basis of ensuring the indoor refrigeration effect. The reduction of the flow rate of the target indoor unit increases the amount of refrigerant in other indoor units, so that the outlet air temperature of the target indoor unit can be increased to prevent the condensation of the target indoor unit, and the refrigerating effect of other indoor units which are not opened in the preset air sense mode can be enhanced, thereby realizing the effect of effectively considering the condensation prevention and the refrigerating effect of the multi-split air conditioner.
Further, in this embodiment, the first preset condition includes at least one of the following conditions:
the condition 1 is that the duration of starting the preset wind sensing mode by the target indoor unit is longer than a preset duration;
the condition 2 is that the evaporation temperature of the target indoor unit is lower than the target evaporation temperature, or the evaporation pressure of the target indoor unit is lower than the target evaporation pressure;
the condition 3 is that the exhaust temperature of the compressor is lower than a preset exhaust temperature;
and under the condition 4, the exhaust superheat degree of the compressor is less than the preset exhaust superheat degree.
In one implementation manner of this embodiment, the first preset condition includes all the conditions listed above, that is, when the above conditions 1, 2, 3, and 4 are simultaneously satisfied while the electronic expansion valve in the target indoor unit is controlled with the preset superheat degree as a target, the electronic expansion valve is controlled to operate according to the target superheat degree; and when any one of the conditions 1, 2, 3 and 4 is not met, controlling the electronic expansion valve to adjust the opening degree according to the preset superheat degree.
In another implementation manner of this embodiment, the first preset condition may include some of the above listed conditions, that is, when the air conditioner operation meets some of the above conditions 1, 2, 3, and 4 during the control of the electronic expansion valve in the target indoor unit with the preset superheat degree as a target, the electronic expansion valve operation is controlled according to the target superheat degree; and when the air conditioner does not meet any one of the conditions 1, 2, 3 and 4, controlling the electronic expansion valve to adjust the opening degree according to the preset superheat degree.
When the operation of the multi-split air conditioner reaches the conditions, the risk of condensation of the target indoor unit which is opened in the preset air sense mode can be considered to be high, and the target electronic expansion valve is controlled to operate through the target superheat degree in time to reduce the flow of the refrigerant in the target indoor unit, so that the outlet air temperature of the target indoor unit is increased in time to effectively prevent the target indoor unit from being condensed.
Further, in order to improve the accuracy of superheat degree switching and achieve effective consideration of the condensation prevention effect and the refrigeration effect of the space where the target indoor unit is located, after the step S100, the target evaporation temperature or the target evaporation pressure may be determined according to the indoor environment humidity; the target evaporation temperature or the target evaporation pressure tends to increase with an increase in the indoor ambient humidity. Rather, the target evaporation temperature or the target evaporation pressure tends to decrease as the indoor ambient humidity decreases. Therefore, the air outlet temperature of the indoor unit can be ensured not to be too low while the space temperature drop effect of the target indoor unit is met.
It should be noted that, the order of the determination process of the target evaporation temperature or the target evaporation pressure and the execution of the step S20 is not particularly limited, and may be executed simultaneously or sequentially according to actual requirements.
Further, based on any of the above embodiments, another embodiment of the control method of the multi-split air conditioner of the present application is provided. In this embodiment, referring to fig. 4, after step S30, the method further includes:
and S40, when the running of the multi-split air conditioner reaches a second preset condition, controlling the target electronic expansion valve to run according to a preset superheat degree, wherein the preset superheat degree is less than or equal to the target superheat degree.
The second preset condition is specifically a condition which needs to be met by the running parameters of the air conditioner or the environmental parameters of the environment where the air conditioner is located when the preset target indoor unit does not have a condensation risk or the multi-split air conditioner has a reliability risk.
In this embodiment, in the process of controlling the target electronic expansion valve to operate through the target superheat degree to prevent the target indoor unit from generating the condensation problem, when the air conditioner operates to reach the second preset condition, the operation is switched to the smaller preset superheat degree to control the target electronic expansion valve to operate, so that the opening degree of the target electronic expansion valve is increased, the problem of reliability of the system caused by the fact that the target electronic expansion valve operates at a smaller opening degree for a long time is effectively solved, the effect of effectively considering both the condensation prevention effect and the refrigeration effect when the multi-split air conditioner is started without a wind sensation function is ensured, and the reliable operation of the multi-split air conditioner is ensured.
Further, in this embodiment, the second preset condition includes at least one of the following:
the target indoor unit exits the preset wind sensation mode under the condition 5;
condition 6, the discharge temperature of the compressor is greater than or equal to a preset discharge temperature;
and 7, the discharge superheat degree of the compressor is greater than or equal to a preset discharge superheat degree.
In this embodiment, when the air conditioner satisfies any one of the conditions 5, 6, and 7, the control is switched to control the electronic expansion valve to adjust the opening degree at a preset superheat degree. In other embodiments, when the air conditioner meets any two or all of the conditions 5, 6 and 7, the opening degree is controlled by controlling the electronic expansion valve to be adjusted at a preset superheat degree.
When the target indoor unit exits the preset air induction mode, the target indoor unit is indicated to have no condensation risk any more, and at the moment, the target indoor unit can be switched to a smaller target superheat degree to operate so as to ensure the refrigerating effect of the space where the target indoor unit is located. If the number of the target indoor units is more than one, if one part of the target indoor units exits from the preset wind sensation mode and the other part of the target indoor units is still in the preset wind sensation mode, the opening degree of the electronic expansion valve in the indoor unit exiting from the preset wind sensation mode is adjusted according to the preset superheat degree, and the opening degree of the electronic expansion valve in the indoor unit in the preset wind sensation mode is kept adjusted according to the target superheat degree.
The preset exhaust temperature and the preset exhaust superheat degree are critical parameters for distinguishing whether the compressor runs reliably or not. When the preset exhaust temperature or the preset exhaust superheat degree is too large, the preset superheat degree is switched to be smaller to control the electronic expansion valve to adjust the opening degree, so that the opening degree of the electronic expansion valve is increased, the exhaust temperature or the exhaust superheat degree is prevented from being too high, and the reliable operation of the multi-split air conditioner is guaranteed.
Further, based on any of the above embodiments, a further embodiment of the control method of the multi-split air conditioner is provided. In this embodiment, referring to fig. 5, when or after the step of obtaining the indoor environment humidity of the space where the target indoor unit is located is executed, the method further includes:
step S40, acquiring the indoor environment temperature of the space where the target indoor unit is located;
s50, when the indoor environment temperature is less than or equal to a first preset temperature threshold and the indoor environment humidity is less than or equal to a first preset humidity threshold, controlling a target indoor fan to operate at a rotating speed less than a set rotating speed;
the set rotating speed can be a parameter set by default by the system or a parameter set by a user.
Step S60, when the indoor environment temperature is greater than a second preset temperature threshold value or when the indoor environment humidity is greater than a second preset humidity threshold value, adjusting the running rotating speed of the target indoor fan according to the indoor environment temperature and the set temperature of the target indoor unit;
the target indoor fan is a fan in the target indoor unit, the second preset temperature threshold is greater than or equal to the first preset temperature threshold, and the second preset humidity threshold is greater than or equal to the first preset humidity threshold.
The set temperature is specifically a target value which is required to be reached by the temperature of the indoor environment in the refrigeration operation process of the air conditioner.
Specifically, in the process of adjusting the target indoor fan rotating speed according to the indoor environment temperature and the set temperature, the temperature difference between the indoor environment temperature and the set temperature can be determined, the larger the temperature difference is, the larger the target indoor fan rotating speed is, and in contrast, the smaller the temperature difference is, the smaller the target indoor fan rotating speed is. Based on the method, the rotating speed of the fan of the indoor unit which is started to be in the preset wind sensing mode can be automatically adjusted according to the space temperature.
For example, condition 1 and condition 2 are set as: the condition 1 is that the environment temperature T1-the set temperature Ts1 is less than or equal to the preset temperature difference Ta; and under the condition 2, the environment humidity H1 is less than or equal to the preset humidity Ha. If the conditions 1 and 2 are met and the duration TIME1 is prolonged, the fan operates according to the low rotating speed Z of the fixed fan; conditions 3 and 4 were set as follows: and under the condition 3, the environment temperature T1-the set temperature Ts1 is more than or equal to the preset temperature difference Tb and the duration TIME2, and under the condition 4, the environment humidity H1 is more than or equal to the preset humidity Hb and the duration TIME2, the fan operates according to the automatic wind, and the lower the environment temperature and the set temperature difference is, the lower the rotating speed of the fan is.
In this embodiment, when the temperature and humidity of the space where the target indoor unit is located are both low, the fan in the target indoor unit is limited to operate at a low rotation speed; when the temperature or the humidity of the space where the target indoor unit is located is high, the rotating speed of the temperature automatic adjusting fan of the space where the target indoor unit is located is adapted to, on the basis of the rotating speed, the refrigerating capacity and the dehumidifying capacity of the air conditioner can be matched with the actual comfortable requirement of the space, and the temperature and the humidity of the space can meet the comfortable requirement of a user while the condensation problem of the multi-split air conditioner cannot occur in a preset wind sensation mode.
It should be noted that, the sequence of the regulation and control process of the fan rotation speed and the execution of the regulation and control of the opening of the electronic expansion valve based on the superheat degree is not particularly limited, and the regulation and control process and the execution of the regulation and control of the opening of the electronic expansion valve based on the superheat degree may be executed simultaneously or sequentially based on the actual requirements of the operation condition of the air conditioner and the environmental condition of the environment where the target indoor unit is located.
Further, based on any of the above embodiments, another embodiment of the control method of the multi-split air conditioner of the present application is provided. In this embodiment, referring to fig. 6, when or after the step of obtaining the indoor environment humidity of the space where the target indoor unit is located is executed, the method further includes:
step S70, acquiring the indoor environment temperature of the space where the target indoor unit is located;
step S80, when the indoor environment temperature is less than or equal to a first preset temperature threshold and the indoor environment humidity is less than or equal to a first preset humidity threshold, controlling a target air deflector to operate in a first air guiding state;
step S90, when the indoor environment temperature is greater than a second preset temperature threshold value or when the indoor environment humidity is greater than a second preset humidity threshold value, controlling the target air deflector to operate in a second air guiding state;
the target air deflector is arranged at an air outlet of the target indoor unit and provided with a plurality of air dispersion holes, all air in the air duct of the target indoor unit enters a room through the air dispersion holes in the first air guiding state, a gap is formed between the target air deflector and the air outlet in the second air guiding state, one part of air in the air duct of the target indoor unit enters the room through the air dispersion holes, and the other part of air enters the room from the gap; the second preset temperature threshold is greater than or equal to the first preset temperature threshold, and the second preset humidity threshold is greater than or equal to the first preset humidity threshold.
Specifically, the air outlet of the target indoor unit may be provided with a horizontal air deflector and a vertical air deflector, where the target air deflector specifically refers to the vertical air deflector. And under the preset wind sensation mode, the horizontal air deflector of the air outlet of the target indoor unit can maintain the maximum opening degree to operate.
In this embodiment, when the humiture in the space where the target indoor unit is located is lower, it indicates that the current humiture can basically meet the comfortable requirement of the user, at this moment, the air outlet is completely shielded by the target air deflector, and the airflow blown out by the target indoor unit is sent into the room after being blown out through the air outlet, so that the user's wind sensation comfort is further improved on the basis that the humiture meets the user's comfort. When the temperature or the humidity of the space where the target indoor unit is located is high, the temperature and the humidity of the space where the target indoor unit is located cannot meet the comfortable requirement of a user, and the air outlet is shielded by the target air guide plate part, so that the low-wind-speed air supply of the air conditioner is guaranteed to meet the comfortable requirement of the wind sense of the user, and meanwhile, the cold quantity input into the room by the target indoor unit is guaranteed, and the temperature, the humidity and the comfort of the space where the target indoor unit is located are improved.
It should be noted that, the sequence of executing the adjusting process of the air guiding state of the air deflector and the adjusting process of the opening degree of the electronic expansion valve or the rotating speed of the fan based on the superheat degree is not particularly limited, and the adjusting process can be executed simultaneously or sequentially based on the running condition of the air conditioner and the actual requirement of the environment condition of the target indoor unit.
Further, based on any of the above embodiments, in the process of controlling the indoor unit according to the above embodiments, the compressor may be controlled according to the following embodiments, and the specific method for controlling the multi-split air conditioner may further include the following steps:
the method comprises the following steps that S1, when the multi-split air conditioner is in refrigerating operation, if an indoor unit of at least two indoor units starts a preset wind sensation mode, the compressor is controlled to operate according to a first evaporation parameter; the air outlet speed of the corresponding indoor unit in the preset wind sensing mode is smaller than the preset air speed;
in the process of multi-split air-conditioning cooling operation, at least one indoor unit in all the indoor units of the multi-split air conditioner is started and performs cooling operation. Specifically, a part of indoor units may be in cooling operation, and another part of indoor units may be off, or all indoor units may be in cooling operation, and specifically, the operation may be based on the actual cooling requirement of the space where the indoor units are located.
The preset wind speed can be a parameter configured by default in the system or a parameter set by a user. The air outlet speed is lower than the preset air speed, which indicates that the air outlet speed of the target indoor unit is lower, and the target indoor unit needs low air speed air supply under the preset wind sensing mode so as to meet the comfort of users in the space where the target indoor unit is located. The preset wind sensation mode can be started by a user inputting a control command, and can also be started when the indoor unit monitors that the scene parameters of the space where the indoor unit is located reach a preset state. In this embodiment, the preset wind sensation mode is a no-wind sensation mode.
And starting a preset wind induction mode for part or all of the indoor units in at least one indoor unit in refrigeration operation, and controlling the compressor to operate according to the first evaporation parameter.
The first evaporation parameter may be a preset fixed parameter (the operation frequency of the compressor corresponding to the first evaporation parameter is greater than a set frequency value, that is, the operation frequency of the compressor corresponding to the first evaporation parameter is a medium-high frequency), may also be a characteristic parameter of a target evaporation state of the indoor heat exchanger of any indoor unit when the preset wind sensation mode is started (that is, when the state of the indoor unit in which the preset wind sensation mode is not started enters the state of the indoor unit in which the preset wind sensation mode is started), and may also be a parameter determined according to the current operation condition of the multi-split air conditioner.
The first evaporation parameter may be any parameter that characterizes a target evaporation state that the target heat exchanger needs to achieve. In the present embodiment, the first evaporation parameter includes a target value of at least one of an evaporation temperature and an evaporation pressure of the indoor heat exchanger. The temperature of the indoor heat exchanger corresponding to the first evaporation parameter is smaller than a set temperature threshold value.
Specifically, the step of controlling the operation of the compressor according to the first evaporation parameter refers to adjusting the operation frequency of the compressor, so that the actual evaporation state of the indoor heat exchanger in part of the indoor units or all the indoor units or the indoor units with the preset wind sensation mode can reach the target evaporation state corresponding to the first evaporation parameter.
Specifically, different first evaporation parameters correspond to different compressor operating frequencies. The smaller the temperature of the indoor heat exchanger corresponding to the first evaporation parameter is, the higher the running frequency of the compressor is.
In this embodiment, the first evaporation parameter is a preset fixed parameter, and when the at least one indoor unit starts the preset wind sensation mode, no matter how many preset wind sensation modes are started, the compressor is controlled to operate according to the preset first evaporation parameter at the initial stage of starting the preset wind sensation mode.
S2, when the running of the multi-split air conditioner reaches a first preset condition, controlling the running of the compressor according to a second evaporation parameter; the first evaporation parameter and the second evaporation parameter are both characterization parameters of a target evaporation state required to be achieved by an indoor heat exchanger in the indoor unit, and the temperature of the indoor heat exchanger corresponding to the second evaporation parameter is greater than the temperature of the indoor heat exchanger corresponding to the first evaporation parameter.
The first preset condition is specifically a condition required to be achieved by the operating parameters of the multi-split air conditioner or the environmental parameters of the environment where the multi-split air conditioner is located when the multi-split air conditioner does not have a condensation risk or when the refrigeration requirement of the target indoor unit is basically met. The first preset condition can be set according to actual requirements.
The second evaporation parameter may be a preset fixed parameter (the operation frequency of the compressor corresponding to the second evaporation parameter is greater than the set frequency value, that is, the operation frequency of the compressor corresponding to the second evaporation parameter is a medium-low frequency), or may be a parameter determined according to a current operation state of the multi-split air conditioner or an environmental parameter (such as temperature and/or humidity) of an environment where the indoor unit of the preset air sensation mode is started.
The second evaporation parameter may be any parameter that characterizes the target evaporation state that the target heat exchanger needs to achieve. In this embodiment, the second evaporation parameter includes a target value of at least one of an evaporation temperature and an evaporation pressure of the indoor heat exchanger. The temperature of the indoor heat exchanger corresponding to the second evaporation parameter is larger than a set temperature threshold value.
Controlling the operation of the compressor according to the second evaporation parameter specifically refers to adjusting the operation frequency of the compressor, so that the actual evaporation state of the indoor heat exchanger in part of or all of the indoor units or the indoor unit in which the preset wind sensation mode is turned on can reach the target evaporation state corresponding to the second evaporation parameter.
Specifically, the different second evaporation parameters correspond to different compressor operating frequencies. The higher the temperature of the indoor heat exchanger corresponding to the second evaporation parameter is, the lower the running frequency of the compressor is.
The frequency of the compressor corresponding to the second evaporation parameter is less than or equal to the frequency of the compressor corresponding to the first evaporation parameter.
Further, in this embodiment, the first evaporation parameter includes a first evaporation temperature, the second evaporation parameter includes a second evaporation temperature, and the first evaporation temperature is less than the second evaporation temperature. Or, the first evaporation parameter comprises a first evaporation pressure, the second evaporation parameter comprises a second evaporation pressure, and the first evaporation pressure is smaller than the second evaporation pressure.
The method for controlling the multi-split air conditioner provided by the embodiment of the invention has the advantages that when the multi-split air conditioner is operated in a refrigerating mode, and when a preset wind sensing mode that an indoor unit needs to be started at a low wind speed exists, the compressor is not directly switched to be operated at a fixed low frequency, but the compressor is controlled to operate by a first evaporation parameter, so that an indoor heat exchanger of the indoor unit can have a lower temperature to realize rapid temperature reduction, and the indoor refrigerating effect is ensured.
Further, in this embodiment, the step of controlling the operation of the compressor according to the second evaporation parameter is defined as step S2a, and before step S2a, the method further includes:
step S201, when the operation of the multi-split air conditioner reaches a first preset condition, acquiring a first environment humidity of a space where an indoor unit of a preset wind sensation mode is started;
and defining an indoor unit of which the preset wind sensing mode is started in at least two indoor units as a target indoor unit.
In the process of operating the target indoor unit in the preset wind sensation mode, the indoor environment humidity of the space where the target indoor unit is located can be detected in real time or at intervals of set duration. The indoor environment humidity of the space where the target indoor unit is located can be detected through a humidity sensor arranged on the target indoor unit.
Step S202, determining the second evaporation parameter according to the first ambient humidity.
The indoor heat exchanger temperatures corresponding to the second evaporation parameters corresponding to different first ambient humidity have different values. Specifically, the greater the first ambient humidity is, the greater the temperature of the indoor heat exchanger corresponding to the second evaporation parameter is. Conversely, the smaller the first ambient humidity is, the smaller the temperature of the indoor heat exchanger corresponding to the second evaporation parameter is.
The corresponding relationship between the first ambient humidity and the second evaporation parameter can be preset, and can be in the form of a calculation formula, a mapping relationship and the like. Based on the corresponding relationship, a second evaporation parameter corresponding to the current first ambient humidity can be determined. For example, a calculation formula between the humidity and the superheat degree can be preset, and a second evaporation parameter corresponding to the target indoor unit can be calculated by substituting the current first environment humidity of the target indoor unit into the calculation formula; or a mapping table between the humidity and the superheat degree can be preset, the mapping table is inquired through the first environment humidity of the current target indoor unit, and a result obtained through matching can be used as a second evaporation parameter corresponding to the target indoor unit.
When the number of the target indoor units is more than one, namely the number of the indoor units which start the preset wind sensation mode is more than one, determining a second evaporation parameter according to the corresponding first environmental humidity of the more than one target indoor units; the second evaporation parameter may also be determined by determining the first ambient humidity of the target indoor unit with the highest priority among the more than one target indoor units (e.g., the priority of the target indoor unit with a person in the corresponding indoor space is higher than that of the target indoor unit without a person in the corresponding indoor space, or the priority of the target indoor unit with a preset type of device (e.g., precision device) in the corresponding indoor space is higher than that of the other target indoor units, etc.).
Further, the number of target indoor units is different, and the corresponding relationship between the first ambient humidity and the second evaporation parameter may be different. Specifically, more than one preset corresponding relation between the humidity and the evaporation parameters can be preset, each preset corresponding relation can be associated with different numbers, based on the preset corresponding relations, the number of the indoor units which are currently started in the preset wind sensation mode can be determined, the preset corresponding relation associated with the number is obtained, and the second evaporation parameter corresponding to the first environment humidity is determined based on the obtained preset corresponding relation.
In this embodiment, on the basis of the refrigeration effect is guaranteed through lower indoor heat exchanger temperature in the first stage, combine to open the ambient humidity in the space that the indoor set of predetermineeing the wind sense mode in the second stage and confirm the second evaporation parameter, thereby guarantee the accuracy of the second evaporation parameter confirmed, realize the operation of compressor and open the ambient humidity condition phase-match of the indoor set of predetermineeing the wind sense mode, guarantee to control the compressor operation according to the second evaporation parameter, can guarantee that the air-out temperature of the indoor set of opening the predetermined wind sense mode can not be crossed lowly, effectively prevent the indoor set condensation problem from appearing.
Further, in this embodiment, the process of acquiring the first environmental humidity is specifically as follows: if the number of the target indoor units is more than one, acquiring the sub-environment humidity of the space where each indoor unit which starts the preset wind sensation mode is located; determining the first ambient humidity from more than one of the sub-ambient humidities.
Specifically, one of the plurality of sub-ambient humidities may be selected as the first ambient humidity; the first ambient humidity may also be calculated by integrating more than one sub-ambient humidity.
In this embodiment, among more than one sub-ambient humidity, the sub-ambient humidity with the largest value is determined as the first ambient humidity. In other embodiments, the average of more than one sub-ambient humidity may also be taken as the first ambient humidity.
In this embodiment, when more than one indoor unit starts the preset wind sensation mode, the sub-humidities respectively corresponding to the spaces where the indoor units are located are integrated to determine the second evaporation parameter for controlling the operation of the compressor, so that the operation of the compressor can be ensured that each indoor unit starting the preset wind sensation mode does not generate a condensation condition. The second evaporation parameter is determined by taking the maximum sub-environment humidity as the first environment humidity, so that the condensation phenomenon of all indoor units which are opened in the preset air sensing mode can be further avoided, and the normal operation of the multi-split air conditioner can be ensured.
Further, in this embodiment, after step S1, the method further includes:
step S101, acquiring the number of target indoor units and the continuous operation time of the compressor after the preset wind sensation mode is started; the target indoor unit is one of the at least two indoor units, and the preset wind sensation mode is started;
step S102, judging whether the number of the target indoor units is greater than or equal to a target number and whether the continuous operation time length is greater than or equal to a preset time length;
when the number of the target indoor units is greater than or equal to the target number and the continuous operation duration is greater than or equal to the preset duration, executing step S103;
step S103, determining that the operation of the multi-split air conditioner reaches the first preset condition; and when the number of the target indoor units is smaller than the target number, or when the continuous operation time length is smaller than the preset time length, returning to execute the step S1.
The target number may be a preset number, or may be a number determined according to the total number of indoor units currently in an on state in the multi-split air conditioner. The target number is less than or equal to the total number of indoor units in the on state.
In this embodiment, the total number of the indoor units currently in the on state in the at least two indoor units is obtained as the target number. That is, when all the opened indoor units are opened in the preset wind sensing mode, the evaporation parameters are increased to enable the compressor to operate in a frequency reduction mode, otherwise, the lower evaporation parameters are maintained to enable the compressor to operate in a higher frequency mode.
In this embodiment, when the number of the indoor units that are turned on in the preset wind sensation mode is sufficient and the continuous operation time of the compressor is long enough, the compressor is operated at a reduced frequency by increasing the evaporation parameter, otherwise, the compressor is operated at a higher frequency by maintaining a lower evaporation parameter, so that the refrigeration effect of the indoor units that are not turned on in the preset wind sensation mode is prevented from being influenced by unnecessary frequency reduction of the compressor.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, where a control program of a multi-split air conditioner is stored on the computer-readable storage medium, and when the control program of the multi-split air conditioner is executed by a processor, the relevant steps of any of the above control methods of the multi-split air conditioner are implemented.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or system comprising the element.
The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) as described above and includes several instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, a multi-split air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. The control method of the multi-split air conditioner is characterized in that the multi-split air conditioner comprises a compressor and at least two indoor units, the compressor is connected with each indoor unit, and the control method of the multi-split air conditioner comprises the following steps:
when the multi-split air conditioner is in refrigerating operation, acquiring the indoor environment humidity of the space where the target indoor unit is located; the target indoor unit is an indoor unit of which the preset wind sensing mode is opened in the at least two indoor units, and the air outlet speed of the target indoor unit in the preset wind sensing mode is smaller than the preset air speed;
determining a target superheat degree of the target indoor unit according to the indoor environment humidity;
and controlling a target electronic expansion valve to adjust the opening degree according to the target superheat degree, wherein the target electronic expansion valve is an electronic expansion valve in the target indoor unit.
2. The control method of a multi-split air conditioner as set forth in claim 1, further comprising:
when the multi-split air conditioner is in refrigerating operation, if the target indoor unit enters the preset air sense mode, controlling the target electronic expansion valve to operate according to a preset superheat degree and executing the step of acquiring the indoor environment humidity of the space where the target indoor unit is located;
after the step of determining the target superheat degree of the target indoor unit according to the indoor environment humidity, the method further comprises the following steps:
when the operation of the multi-split air conditioner reaches a first preset condition, executing the step of controlling a target electronic expansion valve to adjust the opening degree according to the target superheat degree;
wherein the preset superheat degree is less than or equal to the target superheat degree.
3. The control method of a multi-split air conditioner as set forth in claim 2, wherein the first preset condition includes at least one of:
the duration of the target indoor unit starting the preset wind sensing mode is longer than the preset duration;
the evaporation temperature of the target indoor unit is less than the target evaporation temperature, or the evaporation pressure of the target indoor unit is less than the target evaporation pressure;
the exhaust temperature of the compressor is lower than the preset exhaust temperature;
and the exhaust superheat degree of the compressor is less than the preset exhaust superheat degree.
4. The method for controlling a multi-split air conditioner as claimed in claim 3, wherein the step of obtaining the indoor ambient humidity of the space where the target indoor unit is located further comprises, after the step of obtaining the indoor ambient humidity, the steps of:
determining the target evaporation temperature or the target evaporation pressure according to the indoor environment humidity;
the target evaporation temperature or the target evaporation pressure tends to increase with an increase in the indoor ambient humidity.
5. The control method of a multi-split air conditioner as set forth in claim 1, wherein after said step of controlling a target electronic expansion valve to adjust an opening degree according to the target superheat degree, further comprising:
and when the operation of the multi-split air conditioner reaches a second preset condition, controlling the target electronic expansion valve to operate according to a preset superheat degree, wherein the preset superheat degree is less than or equal to the target superheat degree.
6. The control method of a multi-split air conditioner as set forth in claim 5, wherein the second preset condition includes at least one of:
the target indoor unit exits the preset wind sensation mode;
the exhaust temperature of the compressor is greater than or equal to a preset exhaust temperature;
and the exhaust superheat degree of the compressor is greater than or equal to a preset exhaust superheat degree.
7. The method for controlling a multi-split air conditioner as claimed in any one of claims 1 to 6, wherein, simultaneously with or after the step of obtaining the indoor ambient humidity of the space where the target indoor unit is located, the method further comprises:
acquiring the indoor environment temperature of the space where the target indoor unit is located;
when the indoor environment temperature is less than or equal to a first preset temperature threshold and the indoor environment humidity is less than or equal to a first preset humidity threshold, controlling the target indoor fan to operate at a rotating speed less than a set rotating speed;
when the indoor environment temperature is greater than a second preset temperature threshold value or when the indoor environment humidity is greater than a second preset humidity threshold value, adjusting the running rotating speed of the target indoor fan according to the indoor environment temperature and the set temperature of the target indoor unit;
the target indoor fan is a fan in the target indoor unit, the second preset temperature threshold is greater than or equal to the first preset temperature threshold, and the second preset humidity threshold is greater than or equal to the first preset humidity threshold.
8. The method for controlling a multi-split air conditioner as claimed in any one of claims 1 to 6, wherein the step of obtaining the indoor ambient humidity of the space where the target indoor unit is located is performed simultaneously with or after, further comprising:
acquiring the indoor environment temperature of the space where the target indoor unit is located;
when the indoor environment temperature is less than or equal to a first preset temperature threshold and the indoor environment humidity is less than or equal to a first preset humidity threshold, controlling the target air deflector to operate in a first air guiding state;
when the indoor environment temperature is greater than a second preset temperature threshold value or the indoor environment humidity is greater than a second preset humidity threshold value, controlling the target air deflector to operate in a second air guiding state;
the target air deflector is arranged at an air outlet of the target indoor unit and provided with a plurality of air dispersion holes, all air in the air duct of the target indoor unit enters a room through the air dispersion holes in the first air guiding state, a gap is formed between the target air deflector and the air outlet in the second air guiding state, one part of air in the air duct of the target indoor unit enters the room through the air dispersion holes, and the other part of air enters the room from the gap;
the second preset temperature threshold is greater than or equal to the first preset temperature threshold, and the second preset humidity threshold is greater than or equal to the first preset humidity threshold.
9. The multi-split air conditioner is characterized by comprising:
at least two indoor units;
a compressor connected to each of the indoor units;
the controlling means, indoor set and compressor all with controlling means connects, controlling means includes: a memory, a processor, and a control program of a multi-split air conditioner stored on the memory and executable on the processor, the control program of the multi-split air conditioner implementing the steps of the control method of the multi-split air conditioner as set forth in any one of claims 1 to 8 when executed by the processor.
10. A computer-readable storage medium, wherein a control program of a multi-split air conditioner is stored thereon, and when executed by a processor, implements the steps of the control method of the multi-split air conditioner according to any one of claims 1 to 8.
CN202110921281.4A 2021-08-11 2021-08-11 Multi-split air conditioner, control method thereof and computer readable storage medium Pending CN115704598A (en)

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Application Number Priority Date Filing Date Title
CN202110921281.4A CN115704598A (en) 2021-08-11 2021-08-11 Multi-split air conditioner, control method thereof and computer readable storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110921281.4A CN115704598A (en) 2021-08-11 2021-08-11 Multi-split air conditioner, control method thereof and computer readable storage medium

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Publication Number Publication Date
CN115704598A true CN115704598A (en) 2023-02-17

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