CN111895633B - Control method of multi-split air conditioner - Google Patents

Control method of multi-split air conditioner Download PDF

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Publication number
CN111895633B
CN111895633B CN202010757980.5A CN202010757980A CN111895633B CN 111895633 B CN111895633 B CN 111895633B CN 202010757980 A CN202010757980 A CN 202010757980A CN 111895633 B CN111895633 B CN 111895633B
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China
Prior art keywords
temperature
indoor
indoor unit
greenhouse
reaching
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CN111895633A (en
Inventor
王德平
罗祖春
徐菲菲
潘孝军
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • F24F2110/12—Temperature of the outside air
    • 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 relates to the technical field of air conditioners, and particularly provides a control method of a multi-split air conditioner, aiming at controlling an indoor unit of a temperature reaching room to be switched from a temperature reaching mode to a normal heating mode at a reasonable and accurate time. The control method comprises the steps of firstly, alternately opening or closing a fan of the indoor unit of the greenhouse according to a preset stop-start period to accelerate the heat dissipation speed of the indoor unit of the greenhouse, then, selecting to enable the indoor unit of the greenhouse to be directly switched from a temperature reaching mode to a normal heating mode according to a comparison result between an indoor environment temperature value and a target temperature value, or increasing the start-up time of the fan of the indoor unit of the greenhouse and keeping the stop time of the fan of the indoor unit of the greenhouse unchanged to reduce the ambient temperature around the indoor unit of the greenhouse, so that the interference of the heat radiation of an indoor side heat exchanger on the detection value of an indoor environment temperature sensor is weakened, and the air conditioner can control the indoor unit of the greenhouse to be switched from the temperature reaching mode to the normal heating mode at a reasonable and accurate time, so as to ensure that the actual indoor environment temperature is always within a target temperature range.

Description

Control method of multi-split air conditioner
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides a control method of a multi-split air conditioner.
Background
The existing multi-split air conditioner comprises a plurality of indoor units, because the indoor units are in different indoor environments, the situation that part of the indoor units reach the temperature and other indoor units normally heat often occurs. At present, a multi-split air conditioner enters a temperature reaching mode after an indoor unit reaches the temperature, a fan of the indoor unit of the greenhouse stops running in the temperature reaching mode until the indoor environment temperature is detected to be lower than a target temperature again, the indoor unit of the greenhouse exits the temperature reaching mode, and a normal heating mode is started to convey hot air to the indoor space.
The present multi-split air conditioner is generally provided with indoor environment temperature sensor in order to detect indoor environment temperature in the position of being close to the heat exchanger of indoor set, and present multi-split air conditioner under the heating operating condition, thereby still have the refrigerant to flow through the heat exchanger that reaches the greenhouse indoor set and make the heat exchanger temperature that reaches the greenhouse indoor set higher, so, indoor environment temperature sensor can receive the heat radiation influence of heat exchanger, the temperature that leads to indoor environment temperature sensor to detect can not accurately reflect indoor temperature, cause indoor environment temperature to adjust unreasonablely from this easily, influence indoor environment comfort level. For a room with poor heat insulation performance, the temperature detected by the indoor environment temperature sensor can be higher than the real indoor environment temperature. Even if the actual temperature of the room is reduced to be lower than the target temperature, the temperature detected by the indoor environment temperature sensor is still higher than the target temperature, and the air conditioner still executes the temperature reaching mode at the moment, so that the actual temperature of the room is continuously reduced, the body feeling is relatively cold, and the air conditioner cannot heat, so that the user experience is greatly reduced.
In view of this, how to weaken the interference of the heat radiation of the indoor side heat exchanger on the detection value of the indoor ambient temperature sensor so that the air conditioner can control the indoor unit of the greenhouse to switch from the temperature reaching mode to the normal heating mode at a reasonable and accurate time is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a control method of a multi-split air conditioner, which aims to weaken the interference of heat radiation of an indoor side heat exchanger on the detection value of an indoor environment temperature sensor so that the air conditioner can control a greenhouse indoor unit to be switched from a temperature reaching mode to a normal heating mode at a reasonable and accurate time.
The multi-split air conditioner comprises a plurality of indoor units, when the multi-split air conditioner heats, one part of the indoor units is in a normal heating mode, and the other part of the indoor units is in a temperature reaching mode, and the control method of the multi-split air conditioner is characterized by comprising the following steps: alternately turning on or off fans reaching the indoor units of the greenhouse in a preset turn-off period; acquiring an indoor environment temperature value of the indoor unit of the greenhouse; comparing the indoor environment temperature value with a target temperature value of the indoor unit of the greenhouse set by a user; and selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the starting time of a fan of the temperature reaching indoor unit and keeping the stopping time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching the temperature reaching mode to the normal heating mode is met.
In a preferred embodiment of the above control method, the step of selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the startup time of the fan of the temperature reaching indoor unit and keeping the shutdown time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching from the temperature reaching mode to the normal heating mode is satisfied includes: and when the indoor environment temperature value is smaller than the target temperature value, directly switching the temperature-reaching indoor unit from a temperature-reaching mode to a normal heating mode.
In a preferred embodiment of the above control method, the step of selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the startup time of the fan of the temperature reaching indoor unit and keeping the shutdown time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching from the temperature reaching mode to the normal heating mode is satisfied includes: when the indoor environment temperature value is greater than or equal to the target temperature value, acquiring an outdoor environment temperature; comparing the magnitude relation between the outdoor environment temperature and an outdoor environment temperature threshold value; if the outdoor environment temperature is less than or equal to the outdoor environment temperature threshold value, increasing the current starting time of the fan of the indoor unit of the greenhouse by a first time, keeping the shutdown time of the fan of the indoor unit of the greenhouse unchanged, and then returning to the step of obtaining the indoor environment temperature value of the indoor unit of the greenhouse; if the outdoor environment temperature is larger than the outdoor environment temperature threshold value, increasing the current starting time of the fan of the indoor unit of the greenhouse by a second time and keeping the shutdown time of the fan of the indoor unit of the greenhouse unchanged, and then returning to the step of obtaining the indoor environment temperature value of the indoor unit of the greenhouse; wherein the first time amplification is greater than the second time amplification.
In a preferred technical solution of the above control method, the step of "obtaining an indoor ambient temperature value of an indoor machine of the greenhouse" includes: and obtaining the indoor environment temperature value of the indoor machine of the temperature-rising room after an integral number of the stop-start periods.
In a preferred technical solution of the above control method, the step of "obtaining an indoor ambient temperature value of an indoor machine of the greenhouse" includes: obtaining the indoor environment temperature value of the indoor machine of the greenhouse after two stop-start periods
In a preferable technical solution of the above control method, the control method further includes: correcting the target temperature value of the indoor unit of the greenhouse set by a user to obtain a target temperature correction value, wherein the target temperature correction value is larger than the target temperature value; the step of comparing the magnitude relation between the indoor environment temperature value and the target temperature value of the indoor warming machine set by the user comprises the following steps: and comparing the magnitude relation between the indoor environment temperature value and the target temperature correction value.
In a preferred embodiment of the above control method, the step of selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the startup time of the fan of the temperature reaching indoor unit and keeping the shutdown time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching from the temperature reaching mode to the normal heating mode is satisfied includes: and when the indoor environment temperature value is smaller than the target temperature correction value, directly switching the temperature-reaching indoor unit to a normal heating mode from a temperature-reaching mode.
In a preferred embodiment of the above control method, the step of selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the startup time of the fan of the temperature reaching indoor unit and keeping the shutdown time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching from the temperature reaching mode to the normal heating mode is satisfied includes: when the indoor environment temperature value is greater than or equal to the target temperature correction value, acquiring the outdoor environment temperature; comparing the magnitude relation between the outdoor environment temperature and an outdoor environment temperature threshold value; if the outdoor environment temperature is less than or equal to the outdoor environment temperature threshold value, increasing the current starting time of the fan of the indoor unit of the greenhouse by a first time, keeping the shutdown time of the fan of the indoor unit of the greenhouse unchanged, and then returning to the step of obtaining the indoor environment temperature value of the indoor unit of the greenhouse; if the outdoor environment temperature is larger than the outdoor environment temperature threshold value, increasing the current starting time of the fan of the indoor unit of the greenhouse by a second time and keeping the shutdown time of the fan of the indoor unit of the greenhouse unchanged, and then returning to the step of obtaining the indoor environment temperature value of the indoor unit of the greenhouse; wherein the first time amplification is greater than the second time amplification.
In a preferred technical solution of the above control method, the step of "obtaining an indoor ambient temperature value of an indoor machine of the greenhouse" includes: and obtaining the indoor environment temperature value of the indoor machine of the temperature-rising room after an integral number of the stop-start periods.
In a preferred technical solution of the above control method, the step of "obtaining an indoor ambient temperature value of an indoor machine of the greenhouse" includes: and acquiring the indoor environment temperature value of the indoor machine of the greenhouse after the two stop-start periods.
The invention relates to a multi-split air conditioner which comprises a plurality of indoor units, wherein when the multi-split air conditioner heats, one part of the indoor units is in a normal heating mode, and the other part of the indoor units is in a temperature reaching mode, and the control method of the multi-split air conditioner comprises the following steps: alternately turning on or off fans reaching the indoor units of the greenhouse in a preset turn-off period; acquiring an indoor environment temperature value of the indoor unit of the greenhouse; comparing the indoor environment temperature value with a target temperature value of the indoor unit of the greenhouse set by a user; and selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the starting time of a fan of the temperature reaching indoor unit and keeping the stopping time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching the temperature reaching mode to the normal heating mode is met.
The control method of the multi-split air conditioner of the invention comprises the steps of firstly, alternately opening or closing the fans of the indoor units of the greenhouse according to a preset stop period to accelerate the heat dissipation speed of the indoor units of the greenhouse, then comparing the magnitude relation between the indoor environment temperature of the indoor units of the greenhouse and a target temperature value of the indoor units of the greenhouse set by a user, then selecting to directly switch the indoor units of the greenhouse from a temperature reaching mode to a normal heating mode according to the comparison result of the two, or increasing the starting time of the fans of the indoor units of the greenhouse and keeping the shutdown time of the fans of the indoor units of the greenhouse unchanged to reduce the ambient temperature around the indoor units of the greenhouse so as to weaken the interference of the heat radiation of the indoor side heat exchanger on the detection value of the indoor environment temperature sensor, thereby enabling the air conditioner to control the indoor units of the greenhouse to switch from the temperature reaching mode to the normal heating mode at reasonable and accurate time, further ensuring that the actual indoor environment temperature is always in a target temperature range set by the user, thereby achieving the purposes of solving the complaints of the user and improving the user experience.
Drawings
Fig. 1 is a flow chart illustrating a main step of a control method of a multi-split air conditioner according to the present invention;
FIGS. 2 and 3 are schematic diagrams of two detailed step flows of a main step flow of FIG. 1, respectively;
fig. 4 is a flow chart illustrating another main step of a control method of a multi-split air conditioner according to the present invention;
fig. 5 and 6 are two detailed step flow diagrams of another main step flow in fig. 4, respectively.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present application, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, the multi-split air conditioner comprises one outdoor unit or a plurality of outdoor units, and the control method is suitable for the multi-split air conditioner with one outdoor unit and a plurality of outdoor units.
The multi-split air conditioner comprises a plurality of indoor units; when the multi-split air conditioner heats, one part of the indoor units is in a normal heating mode, and the other part of the indoor units is in a temperature reaching mode. For convenience of distinction and explanation, the indoor unit in the temperature reaching mode in the current operating state is referred to as a "temperature reaching indoor unit", and the indoor unit in the normal heating mode in the current operating state is referred to as a "normal heating indoor unit".
As described in the background art, in general, when the indoor environment temperature of the indoor unit reaches a target temperature value preset by a user, the indoor unit is switched from a normal heating mode to a temperature reaching mode, after the working mode is switched, a fan of the indoor unit of the greenhouse is in a shutdown state, heat generated by high-temperature refrigerant flowing through a side heat exchanger of the indoor unit of the greenhouse is gathered on the inner periphery of the greenhouse, so that the ambient temperature of the indoor unit of the greenhouse is far higher than ambient temperatures of other areas in the room, accuracy of detection values of an indoor environment sensor is affected, and finally, the multi-split air conditioner cannot accurately judge and control the time when the indoor unit is switched from the temperature reaching mode to the normal heating mode, and the problem of user complaint caused by the fact that the actual indoor environment temperature is far lower than the target temperature set by the user but the indoor unit still cannot heat in the temperature reaching mode is caused.
In order to weaken the interference of the heat radiation of the indoor side heat exchanger on the detection value of the indoor environment temperature sensor, so that the air conditioner can control the indoor unit of the greenhouse to be switched from the temperature reaching mode to the normal heating mode at a reasonable and accurate time, the invention provides a control method of a multi-split air conditioner, and referring to fig. 1, the flow of a main step of the control method of the multi-split air conditioner comprises the following steps:
and S000, alternately turning on or off the fan reaching the greenhouse indoor unit in a preset stop-start period.
The stop-start period refers to the time length from the stop of the fan to the restart of the fan after the indoor unit enters the temperature reaching mode, specific numerical values of the stop-start period can be determined by those skilled in the art according to factors such as power of the multi-split air conditioner, and the like, and the empirical value of the stop-start period can be 11min (minutes) to 15min (minutes) according to long-term experimental data, wherein the starting time of the fan of the indoor unit reaching the temperature reaching mode can be 60s (seconds), and the stop time can be 10 min.
Therefore, in the embodiment, the fans reaching the greenhouse inner unit are alternately turned on or off through the preset stop-start period, so that the peripheral heat diffusion speed of the greenhouse inner unit can be increased through the fans, and the problem that the peripheral temperature of the greenhouse inner unit is lower than the indoor temperature of other areas due to the fact that the fans are turned on all the time can be solved.
S100, obtaining an indoor environment temperature value Ti of the indoor unit of the greenhouse.
The indoor environment temperature value Ti of the indoor unit of the multi-split air conditioner can be collected through an indoor environment temperature sensor, the indoor environment temperature sensor can be arranged above a heat exchanger of the indoor unit, and the collection result can be transmitted to the air conditioner of the multi-split air conditioner in a wired or wireless communication mode. In the embodiment, the temperature sensor is preferably an infrared temperature sensor, and the detection result of the infrared temperature sensor is more accurate compared with other types of temperature sensors.
S200, comparing the magnitude relation between the indoor environment temperature value Ti and a target temperature value Ts set by a user and reaching the indoor unit of the greenhouse.
The target temperature value Ts may be a temperature value that the indoor environment temperature reaches after the corresponding indoor unit of the multi-split air conditioner heats according to the user's own characteristics and requirements, for example: in the same room, the elderly and children will be set a higher target temperature value Ts when living than the adults. Of course, the target temperature value Ts may be a temperature value that is automatically set by the multi-split air conditioner according to the weather condition of the installation environment and the use condition of the user in a normal condition.
S300, selectively enabling the temperature reaching indoor unit to be directly switched to the normal heating mode from the temperature reaching mode according to the comparison result, or increasing the starting time of a fan of the temperature reaching indoor unit and keeping the stopping time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature reaching the periphery of the temperature reaching indoor unit until the condition of switching from the temperature reaching mode to the normal heating mode is met.
It can be seen that the control method of the multi-split air conditioner of the invention firstly turns on or off the fan of the indoor unit of the greenhouse alternately with a preset off-on period to accelerate the heat dissipation speed of the indoor unit of the greenhouse, then compares the magnitude relation between the indoor environment temperature of the indoor unit of the greenhouse and the target temperature value of the indoor unit of the greenhouse set by the user, and then selects to switch the indoor unit of the greenhouse from the temperature reaching mode to the normal heating mode directly according to the comparison result of the two, or increases the on-time of the fan of the indoor unit of the greenhouse and keeps the off-time of the fan of the indoor unit of the greenhouse unchanged to reduce the ambient temperature around the indoor unit of the greenhouse, so as to weaken the interference of the heat radiation of the indoor side heat exchanger on the detection value of the indoor environment temperature sensor, thereby the air conditioner can control the indoor unit of the greenhouse from the temperature reaching mode to the normal heating mode at a reasonable and accurate time, and then ensure that the actual indoor environment temperature is always in the target temperature range set by the user, thereby achieving the purposes of solving the complaints of the user and improving the user experience.
In order to better understand the above control method of the multi-split air conditioner of the present invention, the detailed step flow of the above control method will be described in detail with reference to fig. 2 and 3 of the drawings. It should be noted that, in order to improve readability of the text, only different steps of the two detailed step flows and the main step flow of fig. 1 are described in detail below, the same steps are not described again, and for convenience of distinction, step marks different from those of fig. 1 are used for different steps, and the same steps are marked along the step marks of fig. 1.
Referring to fig. 2, compared with fig. 1, the main difference of a detailed step flow of the above control method lies in the step "selectively switching the greenhouse indoor unit from the temperature reaching mode to the normal heating mode directly, or increasing the start-up time of the fan of the greenhouse indoor unit and keeping the shutdown time of the fan unchanged to reduce the ambient temperature around the greenhouse indoor unit until the condition of switching from the temperature reaching mode to the normal heating mode is satisfied", which is mainly detailed in step S300 of fig. 1.
In detail, the step of selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the start-up time of the fan of the temperature reaching indoor unit and keeping the shutdown time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching the temperature reaching mode to the normal heating mode is met according to the comparison result specifically includes:
when the indoor environment temperature value Ti is less than the target temperature value Ts, step S301 is performed, and when the indoor environment temperature value Ti is greater than or equal to the target temperature value Ts, step S302 is performed.
S301, directly switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode.
S302, acquiring the outdoor environment temperature To.
The outdoor environment temperature value To of the indoor unit of the multi-split air conditioner can be collected through an outdoor environment temperature sensor, the outdoor environment temperature sensor can be arranged above a heat exchanger of an outdoor unit, and the collection result is transmitted To the multi-split air conditioner in a wired or wireless communication mode. In the embodiment, the temperature sensor is preferably an infrared temperature sensor, and the detection result of the infrared temperature sensor is more accurate compared with other types of temperature sensors.
S303, comparing the magnitude relation between the outdoor environment temperature value To and the outdoor environment temperature threshold value Tset.
The outdoor ambient temperature threshold Tset is a critical value for determining the indoor and outdoor temperature difference, and when the outdoor ambient temperature value To is greater than the outdoor ambient temperature threshold Tset, it indicates that the indoor and outdoor temperature difference is small, whereas when the outdoor ambient temperature value To is less than the outdoor ambient temperature threshold Tset, it indicates that the indoor and outdoor temperature difference is large. The outdoor environment temperature threshold Tset may be set by those skilled in the art according to the specific use environment of the multi-split air conditioner.
If the outdoor ambient temperature To is less than or equal To the outdoor ambient temperature threshold Tset, i.e. To is less than or equal To Tset, the process proceeds To step S304, and if the outdoor ambient temperature To is greater than the outdoor ambient temperature threshold Tset, i.e. To > Tset, the process proceeds To step S305.
S304, increasing the current startup time of the fan of the greenhouse indoor unit by a first time increment delta tk1, keeping the shutdown time of the fan of the greenhouse indoor unit unchanged, and then returning to the step S100.
S305, increasing the current starting time of the fan of the greenhouse indoor unit by a second time increase delta tk2 and keeping the stopping time of the fan of the greenhouse indoor unit unchanged, and then returning to the step S100, wherein the first time increase delta tk1 is larger than the second time increase delta tk 2.
For ease of understanding, the above control method is exemplified below with reference to actual values: the preset startup time in the stop cycle of the fan of the greenhouse indoor unit is 60s (seconds), the stop time is 10min (minutes), the target temperature value Ts of the greenhouse indoor unit is set to be 23 ℃ by a user, and if the indoor environment temperature Ti is less than the target temperature value Ts, namely Ti is less than Ts, the greenhouse indoor unit is directly switched from the temperature reaching mode to the normal heating mode.
If the indoor environment temperature is Ti which is more than or equal To the target temperature value Ts, namely Ti which is more than or equal To Ts, and the detected outdoor environment temperature is equal To 2 ℃ and is lower than the set outdoor environment temperature threshold value by 7 ℃, namely To < Tset, the indoor and outdoor temperature difference is larger, the indoor heat dissipation is fast, the room temperature reduction is relatively fast, the human body has obvious temperature reduction amplitude, but the heat radiation quantity of the indoor side heat exchanger of the indoor machine of the greenhouse is unchanged, the stop time of the fan of the indoor machine of the greenhouse is kept unchanged, but the current start-up time (60s) of the fan of the indoor machine of the greenhouse is increased by delta tk1(20s) for the first time, namely the start-up time of the fan of the indoor machine of the greenhouse is equal To 60s +20s 80s, the aim of accelerating the temperature reduction speed of the side heat exchanger of the greenhouse is achieved, and the interference of the heat radiation of the indoor side heat exchanger on the detection value of the indoor environment temperature sensor is weakened, the detection value of the indoor environment temperature sensor tends to approach the actual indoor environment temperature, so that the time for switching the indoor unit of the greenhouse from the single-temperature mode to the normal heating mode can be determined more accurately.
If the startup time of the fan of the greenhouse indoor unit is increased by a first time increment delta tk1, and the greenhouse indoor unit still does not reach the condition of switching from the temperature reaching mode to the normal heating mode, the method continues to return to the step S100, and repeats the control process, wherein the startup time of the fan of the greenhouse indoor unit in the next control process is increased by a first time increment delta tk1 on the basis of the previous control process (or the first time increment delta tk1 is increased on the basis of the current startup time of the fan), that is, the startup time of the fan in the second control process is 60S +20S + 20S-100S, and the control process is repeated until the condition of switching from the temperature reaching mode to the normal heating mode is met.
If the indoor environment temperature is Ti which is more than or equal To a target temperature value Ts, namely Ti which is more than or equal To Ts, and the detected outdoor environment temperature is equal To 12 ℃ and is higher than a set outdoor environment temperature threshold value of 7 ℃, namely To which is more than or equal To Tset, which shows that the indoor and outdoor temperature difference is small, the indoor heat dissipation is slow, the room temperature reduction is relatively slow, the human body does not obviously feel the temperature reduction amplitude, but the heat radiation quantity of the indoor side heat exchanger of the indoor machine of the greenhouse is unchanged, the stop time of the fan of the indoor machine of the greenhouse is kept unchanged, but the initial start time (60s) of the fan of the indoor machine of the greenhouse is increased by a second time amplification delta tk2(10s), namely the start time of the fan of the indoor machine of the greenhouse is equal To 70s, the aim To accelerate the temperature reduction speed of the indoor side heat exchanger of the greenhouse, weaken the interference of the indoor side heat radiation on the detection value of the indoor environment temperature sensor, and enable the detection value of the indoor environment temperature sensor To approach To the actual indoor environment temperature, therefore, the time for switching the indoor unit of the greenhouse from the single-temperature mode to the normal heating mode can be determined more accurately.
If the startup time of the fan of the greenhouse indoor unit is increased by a second time increment delta tk2, and the greenhouse indoor unit still does not reach the condition of switching from the temperature reaching mode to the normal heating mode, the method continues to return to the step S100, and repeats the control process, the shutdown time of the fan of the greenhouse indoor unit in the next control process is increased by a second time threshold delta tk2 on the basis of the previous control process (also can be said to be increased by a second time threshold delta tk2 on the basis of the current startup time of the fan), that is, the startup time of the fan in the second control process is 60S +10S + 10S-80S, and repeats the control process until the temperature reaching room meets the condition of switching from the temperature reaching mode to the normal heating mode.
It can be seen that, in the embodiment, according to the magnitude relationship between the outdoor environment temperature and the preset outdoor environment temperature threshold, under the condition that the downtime of the fan of the indoor unit of the greenhouse is kept unchanged, the startup time of the fan of the indoor unit of the greenhouse is adjusted by different time amplification in different situations, so that the startup time of the fan is increased by a larger time amplification under the condition that the temperature reduction amplitude of a human body is obvious due to a larger indoor and outdoor environment temperature difference, the indoor unit can be quitted from the temperature reaching range quickly and restart heating is achieved, the indoor temperature quickly reaches the temperature value set by a user, and the time that the user feels uncomfortable due to the fact that the room temperature is too low is shortened as much as possible; under the condition that the temperature difference between the indoor environment and the outdoor environment is small, the human body does not obviously feel the temperature reduction amplitude, the starting time of the fan of the greenhouse indoor unit is increased by relatively low time amplification, the fan is withdrawn from the temperature reaching mode before the user can obviously feel the temperature reduction amplitude, and the fan is restarted to heat, so that the greenhouse indoor unit can be in the temperature reaching mode within relatively long time under the condition that the use experience of the user is not influenced, and the energy consumption can be reduced.
It should be noted that, in order to clearly and intuitively understand the control method of the present invention, each temperature parameter is given an actual value in the above description, and it is understood that these actual values do not limit the protection scope of the present invention, and a person skilled in the art can set a target temperature value Ts of the indoor unit of the greenhouse, an outdoor ambient temperature threshold Tset, a first time increment Δ tk1, a second time increment Δ tk2, a shutdown period of a fan of the indoor unit of the greenhouse, and the like according to the actual power of the multi-air conditioner, the ambient temperature of the installation area, and the actual requirements of the user.
It can be understood that, in general, after the indoor unit is switched from the normal heating mode to the temperature reaching mode, the indoor environment temperature value Ti is reduced to be below the target temperature value Ts only after the indoor unit of the temperature reaching mode operates for a long period of time, and at this time, the indoor environment temperature needs to be switched to the normal heating mode to heat and raise the indoor environment temperature, so that the frequency of the time when the indoor unit of the temperature reaching mode is switched from the temperature reaching mode to the normal heating mode is determined by the control method of the present invention to limit the frequency, so as to ensure that the workload of the air conditioner is within a reasonable range, and the time when the indoor environment temperature value Ti of the indoor unit of the greenhouse is obtained in the another detailed step flow of the main step flow of the control method of fig. 1 is limited.
In detail, referring to fig. 3, another detailed control flow of the main steps 1 of the control method of the present invention includes:
s100', the indoor environment temperature value Ti reaching the indoor unit of the greenhouse is obtained after an integral number of stop cycles.
Further, it is preferable that the step is S100' to obtain the indoor ambient temperature value Ti reaching the indoor unit of the greenhouse after two off periods.
Of course, a person skilled in the art can set the off-cycle of the fan according to the actual power of the multi-split air conditioner, the fan operating parameters of the indoor unit of the greenhouse, and the like, and then determine the time for obtaining the indoor environment temperature value of the indoor unit of the greenhouse based on the setting of the off-cycle.
With continued reference to fig. 4, there is shown another schematic flow chart illustrating the main steps of the control method of the multi-split air conditioner according to the present invention.
As can be seen from fig. 4, another main step flow of the control method of the multi-split air conditioner of the present invention includes:
s000', and alternately turning on or off fans reaching the indoor units of the greenhouse in a preset stop-start period.
The stop-start period refers to the time length from the stop of the fan to the restart of the fan after the indoor unit enters the temperature reaching mode, specific numerical values of the stop-start period can be determined by those skilled in the art according to factors such as power of the multi-split air conditioner, and the like, and the empirical value of the stop-start period can be 11min (minutes) to 15min (minutes) according to long-term experimental data, wherein the starting time of the fan of the indoor unit reaching the temperature reaching mode can be 60s (seconds), and the stop time can be 10 min.
Therefore, in the embodiment, the fans reaching the greenhouse inner unit are alternately turned on or off through the preset stop-start period, so that the peripheral heat diffusion speed of the greenhouse inner unit can be increased through the fans, and the problem that the peripheral temperature of the greenhouse inner unit is lower than the indoor temperature of other areas due to the fact that the fans are turned on all the time can be solved.
S100', obtaining indoor environment temperature value T reaching indoor unit of greenhousei。
Indoor environment temperature value T of indoor unit of multi-split air conditioneriThe indoor environment temperature sensor can be arranged above the heat exchanger of the indoor unit and transmits the acquisition result to the air conditioner of the multi-split air conditioner in a wired or wireless communication mode. In the embodiment, the temperature sensor is preferably an infrared temperature sensor, and the detection result of the infrared temperature sensor is more accurate compared with other types of temperature sensors.
S200' and correcting a target temperature value Ts set by a user of the greenhouse internal machine to obtain a target temperature correction value Tsa, wherein the target temperature correction value Tsa is larger than the target temperature value Ts.
The target temperature value Ts may be a temperature value that the indoor environment temperature reaches after the corresponding indoor unit of the multi-split air conditioner heats according to the user's own characteristics and requirements, for example: in the same room, the elderly and children will be set a higher target temperature value Ts when living than the adults. Of course, the target temperature value Ts may be a temperature value that is automatically set by the multi-split air conditioner according to the weather condition of the installation environment and the use condition of the user in a normal condition.
The purpose of correcting the target temperature value Ts in the control method of the invention is that under the ideal condition, when the indoor environment temperature value Ti of the indoor machine of the greenhouse is less than the target temperature value Ts, the indoor machine of the greenhouse is automatically switched from the temperature reaching mode to the normal heating mode, but in the actual use, because the indoor machine of the greenhouse still has high-temperature refrigerant flowing through, the temperature around the indoor machine of the greenhouse is higher than the temperature of other areas in the room, when the indoor actual environment temperature is less than the target temperature value Ts, the indoor machine is still in the temperature reaching shutdown state and does not enter the normal heating as the user wants, in order to compensate the fact that the actual indoor environment temperature is less than the indoor environment temperature value Ti detected by the indoor environment temperature sensor due to the radiation of the high-temperature refrigerant, the target temperature value Ts is corrected in the control method of the invention, the corrected target temperature value Ts is called as the target temperature correction value Tsa, and the target temperature correction value Tsa is greater than the target temperature value Ts, it may be understood that the target temperature correction value Tsa is the target temperature value Ts + the corrected temperature value, where specific data of the corrected temperature value depends on factors such as an installation location of the indoor ambient temperature sensor, and a person skilled in the art may set the correction temperature value according to the factors, and in the present invention, it is preferable to set the corrected temperature value to 2 ℃, that is, the target temperature correction value Tsa is the target temperature value Ts +2 ℃, and it may be understood that the corrected temperature value of the present invention is not limited to the specific value of 2 ℃ that is preferably selected in the present embodiment, and a person skilled in the art may set the correction temperature value according to parameters such as power of the multi-split air conditioner.
And S300', comparing the magnitude relation between the indoor environment temperature value Ti and the target temperature correction value Tsa.
S400', selectively enabling the temperature reaching indoor unit to be directly switched to the normal heating mode from the temperature reaching mode, or increasing the starting time of a fan of the temperature reaching indoor unit and keeping the stopping time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching from the temperature reaching mode to the normal heating mode is met.
It can be seen that the control method of the multi-split air conditioner of the invention firstly turns on or off the fan of the indoor unit of the greenhouse alternately with a preset off-on period to accelerate the heat dissipation speed of the indoor unit of the greenhouse, then corrects the target temperature value Ts to be larger than the target temperature value Ts to compensate the difference between the actual indoor environment temperature value Ti and the indoor environment temperature value Ti detected by the indoor environment temperature sensor, then selects to switch the indoor unit of the greenhouse from the on-temperature mode to the normal heating mode directly according to the comparison result of the two, or increases the on-time of the fan of the indoor unit of the greenhouse and keeps the off-time of the fan of the indoor unit of the greenhouse unchanged to reduce the ambient temperature of the indoor unit of the greenhouse, weakens the interference of the heat radiation of the indoor side heat exchanger on the detection value of the indoor environment temperature sensor, so that the air conditioner can control the indoor unit of the greenhouse to switch from the on-temperature mode to the normal heating mode at a reasonable and accurate time, and then, the actual indoor environment temperature is ensured to be always within the target temperature range set by the user, so that the purposes of solving the complaints of the user and improving the user experience are achieved.
In order to better understand the above control method of the multi-split air conditioner of the present invention, two detailed step flows of the above control method are described in detail below with reference to fig. 5 and 6 of the accompanying drawings. It should be noted that, in order to improve readability of the text, only different steps of the two detailed step flows and the main step flow in fig. 1 are described in detail below, the same steps are not described again, and for convenience of distinction, step marks different from those in fig. 1 are used for different steps, and the same steps are marked along the step marks in fig. 1.
Referring to fig. 5, compared with fig. 4, the main difference of a detailed step flow of the above control method is that the detailed step mainly refines step S400 "in fig. 1," selectively switching the greenhouse indoor unit from the temperature-reaching mode to the normal heating mode directly, or increasing the startup time of the fan of the greenhouse indoor unit and keeping the shutdown time of the fan unchanged to reduce the ambient temperature around the greenhouse indoor unit until the condition of switching from the temperature-reaching mode to the normal heating mode is satisfied.
In detail, the step of selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the starting time of the fan of the temperature reaching indoor unit and keeping the shutdown time of the fan of the temperature reaching indoor unit unchanged to reduce the local temperature at the side heat exchanger of the temperature reaching indoor unit until the condition of switching the temperature reaching mode to the normal heating mode is met according to the comparison result specifically includes:
when indoor environment temperature value Ti is smaller than target temperature correction value Tsa, the process proceeds to step S401", and when indoor environment temperature value Ti is greater than or equal to target temperature correction value Tsa, the process proceeds to step S402".
S401', and directly switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode.
S402', obtaining the outdoor environment temperature To.
The outdoor environment temperature value To of the indoor unit of the multi-split air conditioner can be collected through an outdoor environment temperature sensor, the outdoor environment temperature sensor can be arranged above a heat exchanger of an outdoor unit, and the collection result is transmitted To the multi-split air conditioner in a wired or wireless communication mode. In the embodiment, the temperature sensor is preferably an infrared temperature sensor, and the detection result of the infrared temperature sensor is more accurate compared with other types of temperature sensors.
S403', comparing the magnitude relation between the outdoor environment temperature value To and the outdoor environment temperature threshold Tset;
if the outdoor environment temperature value To is less than or equal To the outdoor environment temperature threshold Tset, i.e. To is less than or equal To Tset, the step S404 is performed, and if the outdoor environment temperature value To is greater than the outdoor environment temperature threshold Tset, i.e. To > Tset, the step S405 "is performed.
S404 ', increasing the current startup time of the fan reaching the indoor unit of the greenhouse by a first time increment delta tk1, keeping the shutdown time of the fan reaching the indoor unit of the greenhouse unchanged, and then returning to the step S100'.
S405 ', increasing the current starting time of the fan of the greenhouse indoor unit by a second time increment delta tk2 and keeping the stopping time of the fan of the greenhouse indoor unit unchanged, and then returning to the step S100', wherein the first time delta tk1 increase is larger than the second time increment delta tk2, namely delta tk1> delta tk 2.
For ease of understanding, the above control method is exemplified below with reference to actual values: the method comprises the steps that the starting time in the stop cycle of a fan of the greenhouse indoor unit is preset to be 60s (seconds), the stop time is 10min (minutes), a user sets the target temperature value of the greenhouse indoor unit to be 23 ℃, the corrected target temperature correction value is Tsa to be 25 ℃ (the target temperature correction value is target temperature value +2 ℃), and if the indoor environment temperature Ti is smaller than the target temperature correction value, namely Ti is less than 25 ℃, the greenhouse indoor unit is directly switched to a normal heating mode from a temperature reaching mode.
If the indoor ambient temperature is that Ti is more than or equal To the target temperature correction value of 25 ℃, and the detected outdoor ambient temperature is equal To 2 ℃ and is lower than the set outdoor ambient temperature threshold value of 7 ℃, namely To is less than Tset, which indicates that the indoor and outdoor temperature difference is large, the indoor heat dissipation is fast, the room temperature reduction is relatively fast, the temperature reduction amplitude of a human body is obvious, but the heat radiation quantity of the indoor heat exchanger of the indoor greenhouse does not change, the stop time of the fan of the indoor greenhouse keeps unchanged but the start-up time (60s) of the fan of the indoor greenhouse is increased by a first time increase delta tk1(20s), namely the start-up time of the fan of the indoor greenhouse equals 60s +20s To 80s, the purpose is To accelerate the temperature reduction speed of the heat exchanger on the greenhouse side, weaken the interference of the indoor ambient temperature sensor by the indoor heat exchanger, and enable the detection value of the indoor ambient temperature sensor To tend To approach the actual indoor ambient temperature, therefore, the time for switching the indoor unit of the greenhouse from the single-temperature mode to the normal heating mode can be determined more accurately. If the startup time of the fan of the greenhouse indoor unit is increased by a first time increment delta tk1, and the greenhouse indoor unit still does not reach the condition of switching from the temperature reaching mode to the normal heating mode, the method continues to return to the step S100, the control process is repeated, the startup time of the fan of the greenhouse indoor unit in the next control process is increased by a first time increment delta tk1 on the basis of the previous control process (also can be said to be increased by a first time increment delta tk1 on the basis of the current startup time of the fan), namely the startup time of the fan in the second control process is equal to 60S +20S + 20S-100S, and the control process is repeated until the greenhouse indoor unit meets the condition of switching from the temperature reaching mode to the normal heating mode.
If the indoor environment temperature is that Ti is larger than or equal To the target temperature correction value, Ti is larger than or equal To 25 ℃, and the detected outdoor environment temperature is equal To 12 ℃ and is higher than the set outdoor environment temperature threshold value by 7 ℃, namely To is larger than or equal To Tset, the result shows that the indoor and outdoor temperature difference is small, the indoor heat dissipation is slow, the room temperature reduction is relatively slow, the human body does not obviously feel the temperature reduction amplitude, but the heat radiation quantity of the indoor side heat exchanger of the indoor room temperature machine is unchanged, the stop time of the fan of the indoor room temperature machine is kept unchanged, but the initial start time (60s) of the fan of the indoor room temperature machine is increased by a second time increase delta tk2(10s), namely the start time of the fan of the indoor room temperature machine is equal To 70s, the aim To accelerate the temperature reduction speed of the indoor side heat exchanger by heat radiation, weaken the interference of the indoor side heat exchanger on the detection value of the indoor environment temperature sensor, and enable the detection value of the indoor environment temperature sensor To approach To the actual indoor environment temperature, therefore, the time for switching the indoor unit of the greenhouse from the single-temperature mode to the normal heating mode can be determined more accurately. If the startup time of the fan of the greenhouse indoor unit is increased by a second time increment delta tk2, and the greenhouse indoor unit still does not reach the condition of switching from the temperature-reaching mode to the normal heating mode, the method continues to return to the step S100, and repeats the control process, the shutdown time of the fan of the greenhouse indoor unit in the next control process is increased by a second time threshold delta tk2 on the basis of the previous control process (also can be said to be increased by a second time increment delta tk2 on the basis of the current startup time of the fan), that is, the startup time of the fan in the second control process is equal to 60S +10S + 10S-80S, and repeats the control process until the temperature-reaching indoor unit meets the condition of switching from the temperature-reaching mode to the normal heating mode.
It can be seen that, in the present embodiment, according to the magnitude relationship between the outdoor environment temperature and the preset outdoor ambient temperature threshold, under the condition that the downtime of the fan of the greenhouse indoor unit is kept unchanged, the control method adjusts the startup time of the fan of the greenhouse indoor unit by different increments according to different situations: under the condition that the temperature difference between indoor and outdoor environments is large, and the human body has obvious feeling of temperature reduction, the starting time of the fan is increased greatly, so that the indoor unit in the greenhouse can be quickly withdrawn to reach the temperature and restart to heat, the indoor temperature can quickly reach the temperature value set by a user, and the time for the user to feel uncomfortable due to the fact that the room temperature is too low is shortened as much as possible; under the condition that the temperature difference between the indoor environment and the outdoor environment is small, the human body does not obviously feel the temperature reduction amplitude, the starting time of the fan of the greenhouse indoor unit is increased by relatively low amplification, the fan is withdrawn from the temperature reaching mode before the user can obviously feel the temperature reduction amplitude, and the greenhouse indoor unit is restarted to heat, so that the greenhouse indoor unit can be in the temperature reaching mode within relatively long time under the condition that the user experience is not influenced, and partial energy consumption can be reduced.
It should be noted that, in order to clearly and intuitively understand the control method of the present invention, in the above example, each temperature parameter is given an actual value, and it can be understood that the actual values do not limit the protection scope of the present invention, and a person skilled in the art can set a target temperature value of the greenhouse indoor unit, a room temperature and ambient temperature threshold value, a first time increase, a second time increase, a stop period of a fan of the greenhouse indoor unit, and the like according to the actual power of the multi-air conditioner, the ambient temperature of the installation area, and the actual requirements of the user.
It can be understood that, in general, after the indoor unit is switched from the normal heating mode to the temperature reaching mode, the indoor environment temperature value Ti is reduced to be below the target temperature value Ts only after the indoor unit of the temperature reaching mode operates for a long period of time, and at this time, the indoor environment temperature needs to be switched to the normal heating mode to heat and raise the indoor environment temperature, so that the frequency of the time when the indoor unit of the temperature reaching mode is switched from the temperature reaching mode to the normal heating mode is determined by the control method of the present invention to limit, so as to ensure that the workload of the air conditioner is within a reasonable range, and the time when the indoor environment temperature value Ti of the indoor unit of the greenhouse is obtained in the another detailed step flow of the main step flow of the control method of fig. 4 is limited.
In detail, referring to fig. 5, another detailed control flow of a main step of the control method of the present invention includes:
s100', the indoor environment temperature value Ti reaching the indoor machine of the greenhouse is obtained after an integral number of stop cycles.
Further, it is preferred that this step is S100' ", the indoor ambient temperature value Ti up to the indoor machine of the greenhouse is acquired after two off-periods.
Of course, a person skilled in the art can set the off-cycle of the fan according to the actual power of the multi-split air conditioner, the fan operating parameters of the indoor unit of the greenhouse, and the like, and then determine the time for obtaining the indoor environment temperature value of the indoor unit of the greenhouse based on the setting of the off-cycle.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (6)

1. A control method of a multi-split air conditioner, wherein the multi-split air conditioner comprises a plurality of indoor units, when the multi-split air conditioner heats, one part of the indoor units is in a normal heating mode, and the other part of the indoor units is in a temperature reaching mode, and the control method comprises the following steps:
alternately turning on or off fans reaching the indoor units of the greenhouse in a preset turn-off period;
acquiring an indoor environment temperature value of the indoor unit of the greenhouse;
comparing the indoor environment temperature value with a target temperature value of the indoor unit of the greenhouse set by a user;
selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the starting time of a fan of the temperature reaching indoor unit and keeping the shutdown time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching the temperature reaching mode to the normal heating mode is met;
the step of selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the starting time of the fan of the temperature reaching indoor unit and keeping the shutdown time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching from the temperature reaching mode to the normal heating mode is met according to the comparison result comprises the following steps:
when the indoor environment temperature value is smaller than the target temperature value, the temperature reaching indoor unit is directly switched to a normal heating mode from a temperature reaching mode;
the step of selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the starting time of the fan of the temperature reaching indoor unit and keeping the shutdown time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching from the temperature reaching mode to the normal heating mode is met according to the comparison result comprises the following steps:
when the indoor ambient temperature value is greater than or equal to the target temperature value,
acquiring the outdoor environment temperature;
comparing the magnitude relation between the outdoor environment temperature and an outdoor environment temperature threshold value;
if the outdoor environment temperature is less than or equal to the outdoor environment temperature threshold value, increasing the current starting time of the fan of the indoor unit of the greenhouse by a first time, keeping the shutdown time of the fan of the indoor unit of the greenhouse unchanged, and then returning to the step of obtaining the indoor environment temperature value of the indoor unit of the greenhouse;
if the outdoor environment temperature is larger than the outdoor environment temperature threshold value, increasing the current starting time of the fan of the indoor unit of the greenhouse by a second time and keeping the shutdown time of the fan of the indoor unit of the greenhouse unchanged, and then returning to the step of obtaining the indoor environment temperature value of the indoor unit of the greenhouse;
wherein the first time amplification is greater than the second time amplification.
2. The method for controlling a multi-split air conditioner according to claim 1, wherein the step of obtaining the indoor ambient temperature value up to the indoor unit of the greenhouse comprises:
and obtaining the indoor environment temperature value of the indoor machine of the temperature-rising room after an integral number of the stop-start periods.
3. The method for controlling a multi-split air conditioner according to claim 1, wherein the step of obtaining the indoor ambient temperature value up to the indoor unit of the greenhouse comprises:
and acquiring the indoor environment temperature value of the indoor machine of the greenhouse after the two stop-start periods.
4. The control method of a multi-split air conditioner as set forth in claim 1, further comprising the steps of:
correcting the target temperature value of the indoor unit of the greenhouse set by a user to obtain a target temperature correction value, wherein the target temperature correction value is larger than the target temperature value;
the step of comparing the magnitude relation between the indoor environment temperature value and the target temperature value of the indoor warming machine set by the user comprises the following steps:
comparing the magnitude relation between the indoor environment temperature value and the target temperature correction value;
the step of selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the starting time of the fan of the temperature reaching indoor unit and keeping the shutdown time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching from the temperature reaching mode to the normal heating mode is met according to the comparison result comprises the following steps:
when the indoor environment temperature value is smaller than the target temperature correction value, the temperature reaching mode of the indoor unit of the temperature reaching room is directly switched to a normal heating mode;
the step of selectively switching the temperature reaching indoor unit from the temperature reaching mode to the normal heating mode directly or increasing the starting time of the fan of the temperature reaching indoor unit and keeping the shutdown time of the fan of the temperature reaching indoor unit unchanged to reduce the ambient temperature around the temperature reaching indoor unit until the condition of switching from the temperature reaching mode to the normal heating mode is met according to the comparison result comprises the following steps:
when the indoor ambient temperature value is greater than or equal to the target temperature correction value,
acquiring the outdoor environment temperature;
comparing the magnitude relation between the outdoor environment temperature and an outdoor environment temperature threshold value;
if the outdoor environment temperature is less than or equal to the outdoor environment temperature threshold value, increasing the current starting time of the fan of the indoor unit of the greenhouse by a first time, keeping the shutdown time of the fan of the indoor unit of the greenhouse unchanged, and then returning to the step of obtaining the indoor environment temperature value of the indoor unit of the greenhouse;
if the outdoor environment temperature is larger than the outdoor environment temperature threshold value, increasing the current starting time of the fan of the indoor unit of the greenhouse by a second time and keeping the shutdown time of the fan of the indoor unit of the greenhouse unchanged, and then returning to the step of obtaining the indoor environment temperature value of the indoor unit of the greenhouse.
5. The method for controlling a multi-split air conditioner according to claim 4, wherein the step of obtaining the indoor ambient temperature value up to the indoor room unit comprises:
and obtaining the indoor environment temperature value of the indoor machine of the temperature-rising room after an integral number of the stop-start periods.
6. The method for controlling a multi-split air conditioner according to claim 4, wherein the step of obtaining the indoor ambient temperature value up to the indoor room unit comprises:
and acquiring the indoor environment temperature value of the indoor machine of the greenhouse after the two stop-start periods.
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