CN114738924A - Multi-split air conditioner and control method and control device thereof - Google Patents

Multi-split air conditioner and control method and control device thereof Download PDF

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Publication number
CN114738924A
CN114738924A CN202210385055.3A CN202210385055A CN114738924A CN 114738924 A CN114738924 A CN 114738924A CN 202210385055 A CN202210385055 A CN 202210385055A CN 114738924 A CN114738924 A CN 114738924A
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China
Prior art keywords
temperature
time
indoor
corrected
preset
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CN202210385055.3A
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Chinese (zh)
Inventor
何振华
张铮
高学伟
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Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd, Qingdao Haier Air Conditioning Electric Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Priority to CN202210385055.3A priority Critical patent/CN114738924A/en
Publication of CN114738924A publication Critical patent/CN114738924A/en
Priority to PCT/CN2022/126421 priority patent/WO2023197557A1/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2120/00—Control inputs relating to users or occupants
    • F24F2120/20—Feedback from users
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a multi-split air conditioner and a control method and a control device thereof, aiming at improving the control accuracy and the use comfort of the air conditioner and realizing the function of an intelligent air conditioner. The control method comprises the following steps: when an indoor unit temperature-reaching shutdown signal is received, acquiring a first detection temperature and a first indoor temperature; correcting the first indoor temperature according to the first detection temperature to obtain a corrected indoor temperature; taking the time when the corrected indoor temperature meets the preset residual heat blowing time correction condition as timing starting time, starting timing, and respectively obtaining first timing time, second timing time and third timing time according to the preset condition; when the difference between the third timing time and the second timing time meets a preset time condition, determining the third timing time as the corrected after-blowing residual heat time; otherwise, determining the first timing time as the corrected after-blowing residual heat time.

Description

Multi-split air conditioner and control method and control device thereof
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to an air conditioner, in particular to a multi-split air conditioner and a control method and a control device thereof.
Background
A multi-split air conditioner generally includes a plurality of indoor units, and refrigerant pipes of the plurality of indoor units are connected in parallel to share one or more outdoor units. For a multi-split air conditioner, a temperature detection device is usually arranged at an air return opening of an indoor unit, and whether the indoor unit meets a temperature-reaching shutdown condition or not is judged according to the air return temperature detected by the temperature detection device. When an indoor unit meets a temperature-reaching shutdown condition, a common control scheme is to blow waste heat to the indoor unit, blow out heat accumulated in the indoor unit, and then close a throttling component of the indoor unit.
In the prior art, the time for blowing the waste heat by the multi-split air conditioner is usually a fixed value determined when the air conditioner leaves a factory. The waste heat blowing time of a part of multi-split air conditioners is not fixed, and the waste heat blowing time is determined by the rotating speed of an indoor fan when the multi-split air conditioners enter a waste heat blowing state.
However, whether fixed waste heat blowing time is adopted or the waste heat blowing time duration is determined according to the rotating speed of the indoor fan, the waste heat blowing time duration is only set from the running state of the multi-split air conditioner, and the influence of relevant factors such as a room structure where the indoor unit is installed, an installation position of the indoor unit in a room, an installation mode and the like is not considered, so that the problems that the room temperature is reduced after the indoor unit is stopped when reaching the temperature, the indoor unit is started but cannot be started normally again often occur in the use process of the multi-split air conditioner, or the problem that cold air is blown out when the indoor unit is stopped when reaching the temperature and blowing the waste heat is performed can occur, the room temperature is not suitable, and the comfort degree of a user is influenced.
Disclosure of Invention
An object of the present invention is to provide a method and an apparatus for controlling a multi-split air conditioner, which adjust a waste heat blowing time based on a corrected temperature, so that the waste heat blowing time is adaptive to an installation state of an indoor unit of the air conditioner, thereby improving accuracy of air conditioner control and comfort in use, and realizing an intelligent air conditioner function.
In order to achieve the purpose, the control method of the multi-split air conditioner provided by the invention adopts the following technical scheme:
a control method of a multi-split air conditioner, the control method comprising:
when an indoor unit temperature-reaching shutdown signal is received, acquiring a first detection temperature reflecting the human body sensing temperature in a room where the indoor unit is located and a first indoor temperature detected by the indoor unit;
correcting the first indoor temperature according to the first detection temperature to obtain a corrected indoor temperature;
when the corrected indoor temperature meets the preset residual heat blowing time correction condition, executing the following process of determining the corrected residual heat blowing time:
taking the time when the corrected indoor temperature meets the preset residual heat blowing time correction condition as timing starting time, and starting timing;
in the timing process, acquiring a second detection temperature reflecting the human body perception temperature in the room where the indoor unit is located, a second indoor temperature detected by the indoor unit and the temperature of an inner coil of the indoor unit in real time;
determining the time from the timing starting time to the time when the difference between the second indoor temperature and the second detection temperature meets a first temperature difference condition and the temperature of the inner coil meets a preset coil temperature condition as first timing time;
determining the time from the timing starting time to the time when the difference between the second indoor temperature and the second detection temperature meets a second temperature difference condition and the temperature of the inner coil does not meet the preset coil temperature condition as second timing time; the second timing time is greater than the first timing time;
determining a time from the timing start time to a time when a difference between the second indoor temperature and the second detected temperature satisfies a third temperature difference condition as a third timing time; the third timing time is greater than the second timing time;
when the difference between the third timing time and the second timing time meets a preset time condition, determining the third timing time as the corrected after-blowing residual heat time; otherwise, determining the first timing time as the corrected after-blowing residual heat time.
In some embodiments of the present application, the method further comprises:
after the corrected indoor temperature meets the preset residual heat blowing time correction condition, controlling a fan of the indoor unit to operate at a first preset rotating speed;
controlling a fan of the indoor unit to operate at a second preset rotating speed after the difference between the second indoor temperature and the second detection temperature meets the first temperature difference condition and the temperature of the inner coil pipe meets the preset coil temperature condition; the second preset rotating speed is less than the first preset rotating speed;
and after the difference between the second indoor temperature and the second detection temperature meets the second temperature difference condition and the temperature of the inner coil pipe does not meet the preset coil temperature condition, controlling a fan of the indoor unit to stop.
In some embodiments of the present application, the method further comprises:
and when the corrected indoor temperature does not meet the preset residual heat blowing time correction condition, controlling the indoor unit to execute cold air prevention control or controlling the running state of the indoor unit to be kept.
In some embodiments of the present application, the preset residual blowing heat time correction condition includes: the corrected indoor temperature is higher than the set temperature;
when the corrected indoor temperature does not meet the preset residual heat blowing time correction condition, controlling the indoor unit to execute the cold air prevention control or controlling the running state of the indoor unit to be kept comprises the following steps:
when the corrected indoor temperature is lower than the set temperature, controlling the indoor unit to execute the cold air prevention control;
and when the corrected indoor temperature is equal to the set temperature, controlling the running state of the indoor unit to be maintained.
In some embodiments of the present application, when the corrected indoor temperature satisfies a preset residual heat blowing time correction condition, the determining the process of correcting the residual heat blowing time includes:
when the corrected indoor temperature meets the preset residual heat blowing time correction condition, judging whether the temperature-reaching shutdown signal meets a preset temperature-reaching shutdown signal condition;
when the temperature-reaching shutdown signal meets the preset temperature-reaching shutdown signal condition, executing the process of determining the corrected after-blowing residual heat time; otherwise, the process of determining the corrected after-blow residual heat time is not executed.
In some embodiments of the application, when the corrected indoor temperature satisfies the preset residual heat blowing time correction condition, determining whether the temperature-reaching shutdown signal satisfies a preset temperature-reaching shutdown signal condition includes:
judging whether the corrected after-blowing residual heat time of the indoor unit exists or not when the corrected indoor temperature meets the preset after-blowing residual heat time correction condition;
judging whether the temperature-reaching shutdown signal meets the preset temperature-reaching shutdown signal condition or not when the corrected after-blowing residual heat time of the indoor unit does not exist; otherwise, whether the temperature-reaching shutdown signal meets the preset temperature-reaching shutdown signal condition is not judged.
In some embodiments of the present application, the control method further comprises:
and when the corrected after-blowing residual heat time of the indoor unit does not exist and the temperature-reaching shutdown signal does not meet the preset temperature-reaching shutdown signal condition, acquiring the initial residual heat-blowing time of the indoor unit.
In order to achieve the above object, the control device of the multi-split air conditioner provided by the present invention is implemented by adopting the following technical scheme:
a control apparatus of a multi-split air conditioner, the control apparatus comprising:
the first detection temperature acquisition unit is used for acquiring a first detection temperature reflecting the human body sensing temperature in a room where the indoor unit is located when a temperature reaching shutdown signal of the indoor unit is received;
the first indoor temperature acquisition unit is used for acquiring a first indoor temperature detected by the indoor unit when receiving a temperature-reaching shutdown signal of the indoor unit;
a corrected indoor temperature obtaining unit configured to correct the first indoor temperature according to the first detected temperature;
a corrected indoor temperature judging unit for judging whether the corrected indoor temperature meets a preset residual heat blowing time correction condition;
the second detection temperature acquisition unit is used for acquiring a second detection temperature reflecting the human body perception temperature in the room where the indoor unit is located in real time in the process of starting timing when the corrected indoor temperature meets the preset residual heat blowing time correction condition;
the second indoor temperature acquisition unit is used for acquiring a second indoor temperature detected by the indoor unit in real time in the process of starting timing when the corrected indoor temperature meets the preset residual heat blowing time correction condition;
the inner coil temperature acquisition unit is used for acquiring the inner coil temperature of the indoor unit in real time in the process of starting timing when the corrected indoor temperature meets the preset residual heat blowing time correction condition;
a first timing time determining unit, configured to determine a first timing time from a time when the corrected indoor temperature satisfies a preset residual heat blowing time correction condition to a time when a difference between the second indoor temperature and the second detected temperature satisfies a first temperature difference condition and the inner coil temperature satisfies a preset coil temperature condition, where the time is set as the timing start time;
a second timing time determining unit, configured to determine a second timing time from a time when the corrected indoor temperature meets a preset residual heat blowing time correction condition as a timing start time to a time when a difference between the second indoor temperature and the second detected temperature meets a second temperature difference condition and the temperature of the inner coil does not meet the preset coil temperature condition; the second timing time is greater than the first timing time;
a third timing time determination unit configured to determine a third timing time from a time when the corrected indoor temperature satisfies a preset residual heat blowing time correction condition as a timing start time to a time when a difference between the second indoor temperature and the second detected temperature satisfies a third temperature difference condition; the third timing time is greater than the second timing time;
correcting the post-blowing residual heat time, and determining the third timing time as the corrected post-blowing residual heat time when the difference between the third timing time and the second timing time meets a preset time condition; otherwise, determining the first timing time as the corrected after-blowing residual heat time.
The present invention further provides a multi-split air conditioner, which includes an outdoor unit and a plurality of indoor units, and further includes a control device of the multi-split air conditioner.
Still another object of the present invention is to provide an electronic device, comprising a processor, a memory and a computer program stored in the memory, wherein the processor is configured to execute the computer program, and implement the control method of the multi-split air conditioner.
Compared with the prior art, the invention has the advantages and positive effects that:
the invention provides a multi-split air conditioner and a control method and a control device thereof.A detected temperature reflecting the human body sensed temperature in a room is used for correcting the indoor temperature, and the corrected indoor temperature is used as a judgment parameter for judging whether to execute the residual heat blowing time correction or not to determine whether to execute the residual heat blowing time correction or not; when the residual heat blowing time is corrected, the timing time is determined based on the human body sensing temperature in the room, the indoor unit detection temperature and the inner coil pipe temperature of the indoor unit, and the residual heat blowing time is further determined according to the timing time, so that the residual heat blowing time is adaptive to the installation states of the room structure where the indoor unit of the air conditioner is installed, the installation position of the indoor unit in the room and the like, the accuracy of the residual heat blowing time is improved, the problems that the temperature of the indoor unit cannot be started and cold air is blown due to inaccurate residual heat blowing time caused by the difference of the installation states of the indoor unit are effectively solved, the accuracy and the use comfort of the air conditioner based on the residual heat blowing time are improved, and the function of the intelligent air conditioner is realized.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flowchart illustrating a control method of a multi-split air conditioner according to a first embodiment of the present invention;
fig. 2 is a schematic flowchart illustrating a control method of a multi-split air conditioner according to a second embodiment of the present invention;
fig. 3 is a schematic structural view illustrating an embodiment of a control apparatus of a multi-split air conditioner according to the present invention;
fig. 4 is a schematic structural diagram of an embodiment of the electronic device of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
It should be noted that the terms "first", "second", "third" and "fourth" in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It should be noted that the technical solutions in the embodiments of the present invention may be combined with each other, but must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the protection scope of the present invention.
The waste heat blowing time adopted in the control of the existing multi-split air conditioner starts from the running state of the multi-split air conditioner, and does not consider the influence of relevant factors such as the room structure of the indoor unit, the installation position of the indoor unit in a room, the installation mode and the like, so that the problems that the room temperature is reduced after the indoor unit is stopped when reaching the temperature, the indoor unit is started but cannot be normally started again are caused, or the problem that cold air is blown out when the indoor unit is stopped when reaching the temperature and the waste heat blowing is stopped can occur. Aiming at the problems, the invention creatively provides a method for determining the timing time based on the human body sensing temperature in the room, the indoor unit detection temperature and the inner coil pipe temperature of the indoor unit, and determining and correcting the residual heat blowing time according to the timing time, so that the residual heat blowing time is self-adaptive to the indoor unit installation state of the air conditioner, the control accuracy and the use comfort of the air conditioner are improved, and the function of the intelligent air conditioner is realized.
Fig. 1 is a flowchart illustrating a first embodiment of a method for controlling a multi-split air conditioner according to the present invention, and in particular, is a flowchart illustrating an embodiment of determining a residual heat blowing time when an indoor unit is operated for heating. The multi-split air conditioner comprises an outdoor unit and a plurality of indoor units, and the control method of the embodiment is specific to one of the indoor units.
As illustrated in fig. 1, the control method of this embodiment is implemented by the following procedure.
Step 101: when a temperature-reaching shutdown signal of the indoor unit is received, a first detection temperature and a first indoor temperature are obtained.
The air return port of the indoor unit is provided with a temperature detection device for detecting the air return temperature of the air return port and used as the indoor temperature detected by the indoor unit. And sending a temperature-reaching shutdown signal of the indoor unit after the detected temperature meets the temperature-reaching shutdown condition. When the indoor unit temperature-reaching shutdown signal is received, a first detection temperature and a first indoor temperature are obtained.
The first indoor temperature is the temperature which is detected and obtained by a temperature detection device arranged in the indoor unit and reflects the indoor temperature.
The first detected temperature is a temperature reflecting a temperature sensed by a human body in a room where the indoor unit is located. The human body senses the temperature, which can be directly sensed by the human body, generally the temperature of the range of human body movement in a room, such as the temperature of the middle lower part of the room. The first detected temperature may be detected by a temperature detecting device disposed in a range of motion of a human body in a room, and the embodiment does not limit the manner of obtaining the first detected temperature. For example, the temperature is detected and obtained by a temperature detection device built in a remote controller of the indoor unit; or, the temperature detection device is arranged at a certain height of the room for detection and acquisition, wherein the certain height is lower than the installation height of the indoor unit and is generally lower than the height of the normal height of a human body, for example, the height position of 1-1.5m in the room; or, the temperature is detected and obtained through a temperature detection device arranged on other electrical equipment placed on the floor of the room.
Step 102: and correcting the first indoor temperature according to the first detection temperature to obtain the corrected indoor temperature.
The difference between the temperature detected by the return air inlet of the indoor unit and the actual temperature experienced by a human body in a room is influenced by the difference of the room structure in which the indoor unit of the multi-split air conditioner is installed, the installation position of the indoor unit in the room, the installation mode of the indoor unit and the like. The first indoor temperature is corrected through the first detection temperature, so that the obtained corrected indoor temperature can overcome the influence of human body temperature feeling caused by the difference of the installation state of the indoor unit, and the accuracy of judgment and execution of other controls based on the corrected indoor temperature is improved.
The present invention is not limited to this embodiment, and all modifications that can overcome the influence of human body temperature caused by the difference in the installation state of the indoor unit after the correction of the indoor temperature are included in the scope of protection of the present invention.
Step 103: and when the corrected indoor temperature meets the preset residual heat blowing time correction condition, executing the process of determining the corrected residual heat blowing time.
The preset blowing residual heat time correction condition is used as a judgment condition for judging whether to execute blowing residual heat time correction, and is a known condition, which can be a fixed condition or a dynamically variable condition.
In some embodiments, the preset residual blowing heat time correction condition is as follows: the corrected indoor temperature is greater than the set temperature. The set temperature is the current set temperature of the operation of the indoor unit, which is a known value.
The process of determining the corrected post blow residual heat time is implemented using steps 104 to 106 described below.
Step 104: taking the time when the preset waste heat blowing time correction condition is met as timing starting time, and starting timing; and in the timing process, the second detection temperature, the second indoor temperature and the temperature of the inner coil are acquired in real time.
The second detection temperature is similar to the first detection temperature, and in order to reflect the temperature of the human body in the room where the indoor unit is located, the detection means is the same as the first detection temperature.
The second indoor temperature is similar to the first indoor temperature, and is a temperature which is detected and acquired by a temperature detection device arranged in the indoor unit and reflects the indoor temperature.
The temperature of the inner coil is the temperature of the coil of the indoor unit heat exchanger and can be detected and obtained by a coil temperature detection device on the indoor unit heat exchanger.
Step 105: and determining the first timing time, the second timing time and the third timing time.
And determining the time from the timing starting time to the time when the difference between the second indoor temperature and the second detection temperature meets the first temperature difference condition and the temperature of the inner coil meets the preset coil temperature condition as the first timing time.
And determining the time from the timing starting time to the time when the difference between the second indoor temperature and the second detection temperature meets the second temperature difference condition and the temperature of the inner coil does not meet the preset coil temperature condition as second timing time.
And determining the time from the timing start time to the time when the difference between the second indoor temperature and the second detected temperature satisfies the third temperature difference condition as a third timing time.
The second timing time is longer than the first timing time, and the third timing time is longer than the second timing time.
For the multi-split air conditioner, after the indoor unit is stopped when the temperature is reached, the indoor temperature detected by the indoor unit is subjected to the process of increasing and then decreasing, and the temperature of the inner coil pipe is gradually decreased. Each temperature difference condition and the tray temperature condition may be determined based on the characteristic of the indoor unit.
In some embodiments, the first delta temperature condition comprises: the second indoor temperature is lower than the second detection temperature, and the difference between the two temperatures is not less than the first temperature difference threshold value. In other embodiments, the first temperature difference threshold is 0.5 ℃, and the first temperature difference condition is determined to be satisfied when the second room temperature is at least 0.5 ℃ lower than the second detected temperature.
In some embodiments, the preset tray temperature condition includes: the temperature of the inner coil is greater than the coil temperature threshold. In other embodiments, if the coil temperature threshold is 20 ℃, when the temperature of the inner coil is greater than 20 ℃, it is determined that the temperature of the inner coil meets the preset coil temperature condition; and if the temperature of the inner coil is less than or equal to 20 ℃, judging that the temperature of the inner coil does not meet the preset coil temperature condition.
In some embodiments, the second differential temperature condition comprises: the second indoor temperature is higher than the second detection temperature, and the difference between the second indoor temperature and the second detection temperature is not less than the second temperature difference threshold. In other embodiments, the second temperature difference threshold is 0.3 ℃, and the second temperature difference condition is determined to be satisfied when the second room temperature is at least 0.3 ℃ higher than the second detected temperature.
In some embodiments, the third temperature differential condition comprises: the second indoor temperature is lower than the second detection temperature, and the difference between the two temperatures is not less than a third temperature difference threshold value. In other embodiments, the third temperature difference threshold is 0.5 ℃, and the third temperature difference condition is determined to be satisfied when the second room temperature is at least 0.5 ℃ lower than the second detected temperature.
Step 106: when the difference between the third timing time and the second timing time meets a preset time condition, determining the third timing time as the corrected after-blowing residual heat time; otherwise, determining the first timing time as the corrected after-blowing residual heat time.
The preset time condition is used as a condition parameter for determining the corrected after-blowing residual heat time, is a known condition, and can be a fixed condition or a dynamic variable condition. In some embodiments, the preset time condition comprises: the difference in time is greater than a time difference threshold. In other embodiments, the time difference threshold is 10S. Then, if the difference between the third timing time and the second timing time is greater than 10S, it is determined that the preset time condition is satisfied.
When the preset time condition is met, the heat exchange of the room where the indoor unit is located is not uniform, the longer third timing time is determined as the corrected after-blowing residual heat time, the residual heat blowing time of the indoor unit is controlled to be longer, and the problem that the indoor unit cannot be started when the temperature is subsequently reached is solved. If the preset time condition is not met, the heat exchange of the room where the indoor unit is located is uniform, the shorter first timing time is determined as the corrected after-heat-blowing time, and the discomfort of the indoor temperature caused by cold air blowing is avoided.
In the control method of the multi-split air conditioner provided in this embodiment, the room temperature is corrected by using the detected temperature that reflects the sensed temperature of the human body in the room, and the corrected room temperature is used as a judgment parameter for judging whether to perform the correction of the residual heat blowing time, and whether to perform the correction of the residual heat blowing time is determined; when the waste heat blowing time is corrected, the timing time is determined based on the human body sensing temperature in the room, the indoor unit detection temperature and the indoor unit inner coil temperature, and the corrected waste heat blowing time is further determined according to the timing time, so that the waste heat blowing time is adaptive to the installation states of the indoor unit of the air conditioner, such as the room structure where the indoor unit is installed, the installation position of the indoor unit in the room and the like, the accuracy of the waste heat blowing time is improved, the problems of incapability of starting the indoor unit when the temperature of the indoor unit reaches the temperature, cold air blowing when the temperature of the indoor unit reaches the temperature and the like, which are caused by the inaccuracy of the waste heat blowing time due to the difference of the installation states of the indoor unit, are effectively solved, the accuracy and the use comfort of the air conditioner based on the waste heat blowing time control are improved, and the function of the intelligent air conditioner is realized.
In some other embodiments, the method for controlling a multi-split air conditioner further includes:
after the corrected indoor temperature meets the preset residual heat blowing time correction condition, controlling a fan of the indoor unit to operate at a first preset rotating speed, and simultaneously controlling an air deflector of the indoor unit to be in a non-blowing position, such as a horizontal position; and after the difference between the second indoor temperature and the second detection temperature meets the first temperature difference condition and the temperature of the inner coil pipe meets the preset coil temperature condition, controlling the fan of the indoor unit to operate at a second preset rotating speed. Wherein the second preset rotating speed is less than the first preset rotating speed. In some embodiments, the first preset rotation speed is a weak wind rotation speed of the indoor unit, and the second preset rotation speed is a minimum rotation speed of the indoor unit.
And controlling the fan of the indoor unit to stop when the difference between the second indoor temperature and the second detection temperature meets a second temperature difference condition and the temperature of the inner coil does not meet a preset coil temperature condition.
Fig. 2 is a flowchart illustrating a method for controlling a multi-split air conditioner according to a second embodiment of the present invention, and in particular, is a flowchart illustrating an embodiment for determining a residual heat blowing time when an indoor unit is operated for heating. The multi-split air conditioner comprises an outdoor unit and a plurality of indoor units, and the control method of the embodiment is specific to one of the indoor units.
As illustrated in fig. 2, the control method of this embodiment is implemented by the following procedure.
Step 201: and when the indoor unit temperature reaching stop signal is received, acquiring a first detection temperature and a first indoor temperature, and acquiring the corrected indoor temperature.
The manner of acquiring the corrected indoor temperature is described with reference to the corresponding process in the embodiment of fig. 1.
Step 202: and judging whether the corrected indoor temperature meets the preset residual heat blowing time correction condition or not. If yes, go to step 204; otherwise, step 203 is executed.
The setting and determining process of the preset residual heat blowing time correction condition is described with reference to the corresponding process in the embodiment of fig. 1.
Step 203: and controlling the indoor unit to perform cold air prevention control or controlling the running state of the indoor unit to be maintained.
And if the corrected indoor temperature does not meet the preset residual heat blowing time correction condition, the residual heat blowing time correction process is not executed, and the indoor unit is controlled to execute cold air prevention control or to control the running state of the indoor unit to be kept.
If the preset residual heat blowing time correction condition comprises the following steps: the corrected indoor temperature is greater than the set temperature. If the corrected indoor temperature does not meet the preset residual heat blowing time correction condition, the corrected indoor temperature is not greater than the set temperature. Under the state, when the corrected indoor temperature is lower than the set temperature, controlling the indoor unit to execute cold air prevention control so as to raise the temperature of the coil pipe of the indoor unit; and when the corrected indoor temperature is equal to the set temperature, controlling the running state of the indoor unit to be kept, namely keeping the current running state of the indoor unit unchanged.
Step 204: and judging whether the corrected after-blowing waste heat time exists or not. If yes, go to step 208; otherwise, step 205 is performed.
If it is determined in step 202 that the corrected indoor temperature satisfies the preset residual heat blowing time correction condition, it is further determined whether there is a corrected residual heat blowing time of the indoor unit, and different controls are executed according to the determination result.
Step 205: and judging whether the received temperature-reaching shutdown signal meets the preset temperature-reaching shutdown signal condition or not. If yes, go to step 207; if not, go to step 206.
If it is determined in step 204 that there is no corrected after-blow waste heat time of the indoor unit, it is further determined whether the received temperature-reaching shutdown signal satisfies a preset temperature-reaching shutdown signal condition.
The preset temperature-reaching shutdown signal condition is used as a judgment condition for judging whether to execute the correction of the residual heat blowing time, and is a known condition. In some embodiments, the preset temperature-reached shutdown signal condition comprises: and receiving a temperature-reaching shutdown signal for the second time after the indoor unit is powered on and started.
Step 206: and obtaining the initial waste heat blowing time.
If it is determined in step 205 that the received temperature-reaching shutdown signal does not satisfy the preset temperature-reaching shutdown signal condition, the correction of the waste heat blowing time is not performed, but the initial waste heat blowing time is obtained, and the waste heat blowing control is performed by using the initial waste heat blowing time. The initial residual heat blowing time is a known time.
When the preset temperature reaching shutdown signal condition is that the indoor unit receives the temperature reaching shutdown signal for the second time after being powered on and started up, if the current temperature reaching shutdown signal is judged to be received for the first time after being powered on and started up, the residual heat blowing time is not corrected, the residual heat blowing time is used for residual heat blowing control, and the problems that the operation of an air conditioner system is unstable and the like caused by too fast starting of the indoor unit due to too short operation time of the indoor unit and insufficient and uniform indoor room temperature are solved.
Step 207: a process of determining the corrected after-blow residual heat time is performed.
If it is determined in step 205 that the received temperature-reaching shutdown signal satisfies the preset temperature-reaching shutdown signal condition, a process of determining the corrected after-blowing residual heat time is performed, and the specific determination process refers to the corresponding description of the embodiment of fig. 1. And the determined corrected after-blowing residual heat time is saved for direct calling when the engine is shut down when reaching the temperature next time.
Step 208: and acquiring the corrected after-blowing residual heat time.
This step is performed according to the judgment result of step 204. Specifically, if it is determined in step 204 that the corrected post-blowing residual heat time of the indoor unit exists, the process of determining whether the temperature-reaching shutdown signal satisfies the preset temperature-reaching shutdown signal condition and adjusting the corrected post-blowing residual heat time is not executed, but the existing corrected post-blowing residual heat time is directly called as the temperature-reaching shutdown post-blowing residual heat time.
In the embodiment, by combining the characteristic that the installation state of the indoor unit in the multi-split air conditioner is determined after installation and basically does not change, only the adjustment process of the one-time waste heat blowing time self-adaptive installation state is needed for a fixed indoor unit, and the adjusted corrected waste heat blowing time is saved and is automatically called when the multi-split air conditioner is shut down after reaching the temperature. And the correction of the residual heat blowing time is not executed immediately in the first temperature-reaching shutdown cycle after the indoor unit is powered on, but the correction is executed again by adopting the second temperature-reaching shutdown cycle or meeting other preset temperature-reaching shutdown signal conditions, so that the problems of unstable operation of the air conditioner system, uncomfortable room temperature and the like caused by inaccurate correction of the residual heat blowing time are avoided.
Fig. 3 is a schematic structural view illustrating an embodiment of a control apparatus for a multi-split air conditioner according to the present invention. Specifically, the present invention is a schematic structural diagram of an embodiment of determining a residual heat blowing time when an indoor unit is in heating operation. The control device of the embodiment is directed to one of the indoor units.
As illustrated in fig. 3, the control device of this embodiment includes the following structural units, functions of the structural units, and relationships between the structural units:
the control device includes:
the first detected temperature obtaining unit 301 is configured to obtain a first detected temperature that reflects a temperature sensed by a human body in a room where the indoor unit is located when the indoor unit is received a warm stop signal.
A first indoor temperature obtaining unit 302, configured to obtain a first indoor temperature detected by the indoor unit when the indoor unit temperature-reaching shutdown signal is received.
A corrected indoor temperature acquiring unit 303, configured to correct the first indoor temperature acquired by the first indoor temperature acquiring unit 302 according to the first detected temperature acquired by the first detected temperature acquiring unit 301.
A corrected indoor temperature determination unit 304, configured to determine whether the corrected indoor temperature acquired by the corrected indoor temperature acquisition unit 303 satisfies a preset residual heat blowing time correction condition.
A second detected temperature obtaining unit 305, configured to obtain, in real time, a second detected temperature that reflects a temperature sensed by a human body in a room where the indoor unit is located, in a process of starting timing from when the corrected indoor temperature determining unit 304 determines that the corrected indoor temperature satisfies the preset residual heat blowing time correction condition.
A second indoor temperature obtaining unit 306, configured to obtain the second indoor temperature detected by the indoor unit in real time during the timing from when the corrected indoor temperature determination unit 304 determines that the corrected indoor temperature satisfies the preset residual heat blowing time correction condition.
An inner coil temperature obtaining unit 307, configured to obtain the inner coil temperature of the indoor unit in real time in a process of starting timing when the corrected indoor temperature is determined by the corrected indoor temperature determining unit 304 to meet the preset residual heat blowing time correction condition.
The first timing time determining unit 308 is configured to determine, as a first timing time, a time from a time when the corrected indoor temperature satisfies the preset residual heat blowing time correction condition to a time when a difference between the second indoor temperature and the second detected temperature satisfies the first temperature difference condition and the temperature of the inner coil satisfies the preset coil temperature condition.
A second timing time determination unit 309 configured to determine, as a second timing time, a time from when the corrected indoor temperature satisfies the preset residual heat blowing time correction condition as a timing start time to when a difference between the second indoor temperature and the second detected temperature satisfies the second temperature difference condition and the temperature of the inner coil does not satisfy the preset coil temperature condition; the second timing time is greater than the first timing time.
A third timing time determination unit 310, configured to time, from a time when the corrected indoor temperature satisfies the preset residual heat blowing time correction condition as a timing start time to a time when a difference between the second indoor temperature and the second detected temperature satisfies a third temperature difference condition, and determine the time as a third timing time; the third timing time is greater than the second timing time.
A corrected post-blowing residual heat time determining unit 311, configured to determine that the third timing time is the corrected post-blowing residual heat time when a difference between the third timing time determined by the third timing time determining unit 310 and the second timing time determined by the second timing time determining unit 309 satisfies a preset time condition; otherwise, the first timed time determined by the first timed time determination unit 308 is determined as the corrected after-blowing residual heat time.
The control device with the structure runs corresponding software programs to execute corresponding functions, and controls the air conditioner according to the control method embodiment of the multi-split air conditioner in the embodiment of fig. 1 and 2 and the processes of other embodiments, so as to achieve the corresponding technical effects of the embodiment of fig. 1 and 2 and other embodiments.
The control device of each embodiment is applied to a multi-split air conditioner, so that the waste heat blowing time is adaptive to the installation state of the indoor unit of the air conditioner, the control accuracy and the use comfort of the air conditioner are improved, and the function of the intelligent air conditioner is realized.
Fig. 4 shows a block diagram of an embodiment of the electronic device of the present invention. The electronic device comprises a processor 41, a memory 42 and a computer program 421 stored on the memory 42, wherein the processor 41 is configured to execute the computer program 421, so as to realize the control methods of the multi-split air conditioner in the embodiment of fig. 1, the embodiment of fig. 2 and other embodiments, and realize the technical effects of the corresponding embodiments. The electronic equipment can be a main control board, a controller and the like of the multi-split air conditioner.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding claims.

Claims (10)

1. A control method of a multi-split air conditioner, the control method comprising:
when an indoor unit temperature-reaching shutdown signal is received, acquiring a first detection temperature reflecting the human body sensing temperature in a room where the indoor unit is located and a first indoor temperature detected by the indoor unit;
correcting the first indoor temperature according to the first detection temperature to obtain a corrected indoor temperature;
when the corrected indoor temperature meets the preset residual heat blowing time correction condition, executing the following process of determining the corrected residual heat blowing time:
taking the time when the corrected indoor temperature meets the preset residual heat blowing time correction condition as timing starting time, and starting timing;
in the timing process, acquiring a second detection temperature reflecting the human body perception temperature in the room where the indoor unit is located, a second indoor temperature detected by the indoor unit and the temperature of an inner coil of the indoor unit in real time;
determining the time from the timing starting time to the time when the difference between the second indoor temperature and the second detection temperature meets a first temperature difference condition and the temperature of the inner coil meets a preset coil temperature condition as first timing time;
determining the time from the timing starting time to the time when the difference between the second indoor temperature and the second detection temperature meets a second temperature difference condition and the temperature of the inner coil does not meet the preset coil temperature condition as second timing time; the second timing time is greater than the first timing time;
determining a time from the timing start time to a time when a difference between the second indoor temperature and the second detected temperature satisfies a third temperature difference condition as a third timing time; the third timing time is greater than the second timing time;
when the difference between the third timing time and the second timing time meets a preset time condition, determining the third timing time as the corrected after-blowing residual heat time; otherwise, determining the first timing time as the corrected after-blowing residual heat time.
2. The control method of a multi-split air conditioner as set forth in claim 1, further comprising:
after the corrected indoor temperature meets the preset residual heat blowing time correction condition, controlling a fan of the indoor unit to operate at a first preset rotating speed;
controlling a fan of the indoor unit to operate at a second preset rotating speed after the difference between the second indoor temperature and the second detection temperature meets the first temperature difference condition and the temperature of the inner coil pipe meets the preset coil temperature condition; the second preset rotating speed is less than the first preset rotating speed;
and controlling the fan of the indoor unit to stop after the difference between the second indoor temperature and the second detection temperature meets the second temperature difference condition and the temperature of the inner coil does not meet the preset coil temperature condition.
3. The control method of a multi-split air conditioner as set forth in claim 1, further comprising:
and when the corrected indoor temperature does not meet the preset residual heat blowing time correction condition, controlling the indoor unit to execute cold air prevention control or controlling the running state of the indoor unit to be kept.
4. The control method of a multi-split air conditioner according to claim 3,
the preset waste heat blowing time correction condition comprises the following steps: the corrected indoor temperature is higher than the set temperature;
when the corrected indoor temperature does not meet the preset residual heat blowing time correction condition, controlling the indoor unit to execute the cold air prevention control or controlling the running state of the indoor unit to be kept comprises the following steps:
when the corrected indoor temperature is lower than the set temperature, controlling the indoor unit to execute the cold air prevention control;
and when the corrected indoor temperature is equal to the set temperature, controlling the running state of the indoor unit to be maintained.
5. The method for controlling a multi-split air conditioner according to any one of claims 1 to 4, wherein the determining of the post-correction residual heat blowing time is performed when the corrected indoor temperature satisfies a preset residual heat blowing time correction condition, and includes:
when the corrected indoor temperature meets the preset residual heat blowing time correction condition, judging whether the temperature-reaching shutdown signal meets a preset temperature-reaching shutdown signal condition;
when the temperature-reaching shutdown signal meets the preset temperature-reaching shutdown signal condition, executing the process of determining the corrected after-blowing residual heat time; otherwise, the process of determining the corrected after-blow residual heat time is not executed.
6. The method for controlling a multi-split air conditioner according to claim 5, wherein when the corrected indoor temperature satisfies the preset residual heat blowing time correction condition, determining whether the temperature-reaching shutdown signal satisfies a preset temperature-reaching shutdown signal condition includes:
judging whether the corrected after-blowing residual heat time of the indoor unit exists or not when the corrected indoor temperature meets the preset after-blowing residual heat time correction condition;
judging whether the temperature-reaching shutdown signal meets the preset temperature-reaching shutdown signal condition or not when the corrected after-blowing residual heat time of the indoor unit does not exist; otherwise, whether the temperature-reaching shutdown signal meets the preset temperature-reaching shutdown signal condition is not judged.
7. A control method of a multi-split air conditioner as set forth in claim 6, wherein said control method further comprises:
and when the corrected after-blowing residual heat time of the indoor unit does not exist and the temperature-reaching shutdown signal does not meet the preset temperature-reaching shutdown signal condition, acquiring the initial residual heat-blowing time of the indoor unit.
8. A control apparatus of a multi-split air conditioner, comprising:
the first detection temperature acquisition unit is used for acquiring a first detection temperature reflecting the human body sensing temperature in a room where the indoor unit is located when a temperature reaching shutdown signal of the indoor unit is received;
the first indoor temperature acquisition unit is used for acquiring a first indoor temperature detected by the indoor unit when receiving a temperature-reaching shutdown signal of the indoor unit;
a corrected indoor temperature obtaining unit configured to correct the first indoor temperature according to the first detected temperature;
a corrected indoor temperature judging unit for judging whether the corrected indoor temperature meets a preset residual heat blowing time correction condition;
the second detection temperature acquisition unit is used for acquiring a second detection temperature reflecting the human body perception temperature in the room where the indoor unit is located in real time in the process of starting timing when the corrected indoor temperature meets the preset residual heat blowing time correction condition;
the second indoor temperature acquisition unit is used for acquiring a second indoor temperature detected by the indoor unit in real time in the process of starting timing when the corrected indoor temperature meets the preset residual heat blowing time correction condition;
the inner coil temperature acquisition unit is used for acquiring the inner coil temperature of the indoor unit in real time in the process of starting timing when the corrected indoor temperature meets the preset residual heat blowing time correction condition;
a first timing time determining unit, configured to determine a first timing time from a time when the corrected indoor temperature satisfies a preset residual heat blowing time correction condition to a time when a difference between the second indoor temperature and the second detected temperature satisfies a first temperature difference condition and the inner coil temperature satisfies a preset coil temperature condition, where the time is set as the timing start time;
a second timing time determining unit, configured to determine a second timing time from a time when the corrected indoor temperature meets a preset residual heat blowing time correction condition as a timing start time to a time when a difference between the second indoor temperature and the second detected temperature meets a second temperature difference condition and the temperature of the inner coil does not meet the preset coil temperature condition; the second timing time is greater than the first timing time;
a third timing time determination unit configured to determine a third timing time from a time when the corrected indoor temperature satisfies a preset residual heat blowing time correction condition as a timing start time to a time when a difference between the second indoor temperature and the second detected temperature satisfies a third temperature difference condition; the third timing time is greater than the second timing time;
a corrected post-blowing residual heat time determining unit, configured to determine that the third timing time is the corrected post-blowing residual heat time when a difference between the third timing time and the second timing time meets a preset time condition; otherwise, determining the first timing time as the corrected after-blowing residual heat time.
9. A multi-split air conditioner comprising an outdoor unit and a plurality of indoor units, wherein said multi-split air conditioner further comprises the control device of the multi-split air conditioner as set forth in claim 8.
10. An electronic device comprising a processor, a memory, and a computer program stored on the memory, wherein the processor is configured to execute the computer program to implement the method of controlling a multi-split air conditioner as set forth in any one of claims 1 to 7.
CN202210385055.3A 2022-04-13 2022-04-13 Multi-split air conditioner and control method and control device thereof Pending CN114738924A (en)

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WO2023197557A1 (en) * 2022-04-13 2023-10-19 青岛海尔空调器有限总公司 Multi-split air conditioner as well as control method and control device thereof

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JP3282719B2 (en) * 1998-07-13 2002-05-20 船井電機株式会社 Indoor ventilation control device for air conditioner
JP2007040554A (en) * 2005-08-01 2007-02-15 Matsushita Electric Ind Co Ltd Air conditioner
CN105650823A (en) * 2016-02-23 2016-06-08 青岛海尔空调电子有限公司 Waste heat blowing control method of air conditioner
CN108731212B (en) * 2018-06-20 2020-07-28 广东美的制冷设备有限公司 Air conditioner and control method and device for blowing waste heat thereof
CN112432335B (en) * 2020-11-02 2022-09-06 青岛海尔空调器有限总公司 Method and device for controlling air conditioner and air conditioner
CN114738924A (en) * 2022-04-13 2022-07-12 青岛海尔空调器有限总公司 Multi-split air conditioner and control method and control device thereof

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WO2023197557A1 (en) * 2022-04-13 2023-10-19 青岛海尔空调器有限总公司 Multi-split air conditioner as well as control method and control device thereof

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