CN111059693B - Control method and device for electric heating of multi-split system and multi-split system - Google Patents
Control method and device for electric heating of multi-split system and multi-split system Download PDFInfo
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- CN111059693B CN111059693B CN201911402332.1A CN201911402332A CN111059693B CN 111059693 B CN111059693 B CN 111059693B CN 201911402332 A CN201911402332 A CN 201911402332A CN 111059693 B CN111059693 B CN 111059693B
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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
- F24F11/32—Responding to malfunctions or emergencies
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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
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F11/88—Electrical aspects, e.g. circuits
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Abstract
本发明提供了一种多联机系统电加热的控制方法、装置及多联机系统，所述控制方法包括：获取所述多联机系统当前的内机总线温度；判断所述内机总线温度是否满足第一预设条件，其中，所述第一预设条件包括所述内机总线温度大于或等于预设的第一温度；若是，则控制所述多联机系统一个或多个内机的电加热关闭。本发明可消除因线路老化或线路选型不当造成的安全隐患。
The present invention provides a control method, device and multi-connection system for electric heating of a multi-connection system. The control method includes: acquiring the current internal unit bus temperature of the multi-connection system; judging whether the indoor unit bus temperature satisfies the first A preset condition, wherein the first preset condition includes that the temperature of the internal unit bus is greater than or equal to a preset first temperature; if so, control the electric heating of one or more internal units of the multi-connection system to be turned off . The invention can eliminate potential safety hazards caused by line aging or improper line selection.
Description
Technical Field
The invention relates to the technical field of multi-online systems, in particular to a control method and device for electric heating of a multi-online system and the multi-online system.
Background
The multi-split air conditioning unit is a multi-split air conditioning unit, and one outdoor unit in the multi-split air conditioning unit is connected with a plurality of indoor units. Under the condition that the ambient temperature is low, the heat exchange is insufficient or the operating environment has a high requirement on the heating capacity of the multi-split air-conditioning system, the requirement can not be met only based on the refrigerant cycle output capacity of the multi-split air-conditioning system, at the moment, partial electric energy is converted into heat energy through an auxiliary electric heating device arranged in the multi-split air-conditioning system, and the heating effect of the multi-split air-conditioning system is improved.
In the multi-split air conditioner, each indoor unit is provided with electric heating auxiliary heating, and the electric heating in each indoor unit is controlled to be turned on or turned off respectively based on certain conditions (the indoor units are turned on by users or accord with the turning-on conditions). Along with the increase of the number of the electric heating switches, the total power of the internal machine is also continuously increased, the circuit current is also continuously increased, if the circuit is improperly selected or the circuit is aged, a large amount of heat can be generated by the circuit after long-time electrification, a fire disaster or a disconnection accident is induced, and potential safety hazards are brought to normal electricity utilization of users.
Disclosure of Invention
The invention solves the problem that the circuit has potential safety hazard caused by improper circuit selection or circuit aging in the existing multi-split system with electric heating.
In order to solve the above problems, the present invention provides a method for controlling electric heating of a multi-split system, comprising the following steps:
acquiring the current bus temperature of an internal machine of the multi-split system;
judging whether the bus temperature of the internal machine meets a first preset condition or not, wherein the first preset condition comprises that the bus temperature of the internal machine is greater than or equal to a preset first temperature;
and if so, controlling the electric heating of one or more internal machines of the multi-split air conditioning system to be closed.
The method comprises the steps of obtaining the current bus temperature of an internal machine of the multi-split system; judging whether the bus temperature of the internal machine meets a first preset condition or not, wherein the first preset condition comprises that the bus temperature of the internal machine is greater than or equal to a preset first temperature; if so, controlling the electric heating of one or more internal machines of the multi-split air-conditioning system to be turned off, namely controlling the whole line temperature of the multi-split air-conditioning system through the bus temperature of the internal machines, and controlling the electric heating of the internal machines in the multi-split air-conditioning system to be turned off when the potential safety hazard exists in the line temperature of the multi-split air-conditioning system determined based on the bus temperature of the internal machines, so that the potential safety hazard caused by line aging or improper line selection is eliminated.
Optionally, the controlling of turning off the electrical heating of one or more internal machines of the multiple split air conditioning system specifically includes the following steps:
acquiring the set temperature of each internal machine in the multi-split air conditioning system and the actual inner ring temperature of the acting space of each internal machine;
respectively calculating the absolute value of the difference between the set temperature of each internal machine and the actual inner ring temperature of the space where the internal machine is located;
determining a preset number of the internal machines with the minimum absolute difference value, wherein the preset number is more than or equal to one;
and controlling the electric heating of the internal machines with the preset number before the minimum absolute value of the difference value to be closed.
The influence on the user experience can be reduced as much as possible, so that the influence on the comfort of the air conditioner can be reduced while the safe power utilization of the user is ensured.
Optionally, after the step of controlling the electrical heating of one or more internal machines of the multiple on-line system to be turned off, the method further includes the following steps:
judging whether the multi-split air-conditioning system meets a preset limit condition or not, wherein the preset limit condition comprises at least one of a first condition and a second condition, the first condition is that the duration of the bus temperature of the internal unit is greater than or equal to the first temperature and is greater than or equal to a preset first duration, and the second condition is that the number of internal units for turning off electric heating is greater than or equal to a first preset number because the bus temperature of the internal unit meets the first preset condition;
and if so, controlling the electric heating of all the internal machines of the multi-online system to be closed.
Through setting up and predetermine the limit condition, can diagnose the improper problem of circuit lectotype, also can take urgent measure when reducing that this measure of interior machine electrical heating can't be quick, effectively remedy the circuit temperature to avoid accident's emergence, strengthen the safety precaution.
Optionally, after the step of determining whether the multi-split system meets the preset condition, the method further includes the following steps:
and if the multi-split air conditioner system does not meet the preset limit condition, returning to the step of acquiring the current internal machine bus temperature of the multi-split air conditioner system. The safety precaution under the normal working state of the multi-split system can be realized.
Optionally, after the step of determining whether the internal machine bus temperature meets a first preset condition, the method further includes:
if the internal machine bus temperature does not meet the first preset condition, judging whether the internal machine bus temperature meets a second preset condition, wherein the second preset condition comprises that the internal machine bus temperature is greater than or equal to a preset second temperature, and the second temperature is less than the first temperature;
and if the bus temperature of the internal machines meets the second preset condition, limiting the number of the internal machines for starting the electric heating to the second preset number or forbidding to start the electric heating of any internal machine again.
The temperature rise speed of the internal machine bus can be slowed down, and the condition that the internal machine bus temperature meets a first preset condition in a short time is avoided.
Optionally, the second preset number is the number of internal machines which have started electric heating currently.
The second preset number is set as the number of the internal machines which are currently started for electric heating, so that the number of the internal machines which can be started for electric heating can be kept as much as possible while the bus temperature of the internal machines is reduced by turning off the electric heating, and the influence on the user experience is reduced.
Optionally, the first preset condition further includes that a duration of the internal machine bus temperature being greater than or equal to the first temperature is greater than or equal to a preset second duration.
The control fluctuation caused by the too fast change of the bus temperature of the internal machine can be avoided, for example, the bus temperature of the internal machine continuously changes between the temperature which is larger than or equal to the first temperature and the temperature which is smaller than the first temperature in a short time, and the stability of the multi-split air-conditioning system is maintained.
The invention also provides a control device for electric heating of the multi-split system, which comprises:
the acquiring unit is used for acquiring the current bus temperature of the internal machine of the multi-online system;
the judging unit is used for judging whether the internal machine bus temperature meets a first preset condition or not, wherein the first preset condition comprises that the internal machine bus temperature is greater than or equal to a preset first temperature;
and the control unit is used for controlling the electric heating of one or more internal machines of the multi-split air conditioning system to be turned off if the bus temperature of the internal machines meets a first preset condition.
The invention also provides a multi-split system, which comprises a computer readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and runs on the processor, so that the control method for the electric heating of the multi-split system is realized.
Optionally, the multiple on-line system further includes a temperature detection device, and the temperature detection device is disposed at a bus of the multiple on-line system.
The present invention also provides a computer-readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the method for controlling the electric heating of the multi-split air-conditioning system is implemented.
Drawings
Fig. 1 is a schematic diagram of an embodiment of a control method for electric heating of a multi-split system according to the invention;
fig. 2 is a schematic diagram of an embodiment of a step S30 of the control method for electric heating of a multi-split system according to the invention;
fig. 3 is a schematic diagram of an embodiment of a subsequent step of step S30 of the control method for electric heating of a multi-split system according to the present invention;
fig. 4 is a schematic diagram of another embodiment of a subsequent step of step S30 of the control method for electric heating of a multi-split system according to the present invention;
fig. 5 is a schematic diagram of an embodiment of a subsequent step of step S20 of the control method for electric heating of a multi-split system according to the present invention;
fig. 6 is a schematic diagram of an embodiment of a control device for electric heating of a multi-split system according to the invention;
fig. 7 is a schematic diagram of an embodiment of a multi-split system according to the present invention.
Description of reference numerals:
101-acquisition unit, 102-determination unit, 103-control unit, 201-computer-readable storage medium, 202-processor.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The invention provides a control method for electric heating of a multi-split system.
Fig. 1 is a schematic diagram of an embodiment of a control method for electric heating of a multi-split system according to the present invention.
As shown in fig. 1, the method for controlling the electric heating of the multi-split system comprises the following steps:
step S10, acquiring the current bus temperature of the internal machine of the multi-split system;
the inner machines in the multi-split system are connected in parallel, the voltages of the inner machines are the same, the current at the bus is the maximum and is the sum of the currents of the inner machines, and the risk is the highest.
In an optional embodiment, after the multi-split air conditioning system is started, a corresponding control program of the control method for the electric heating of the multi-split air conditioning system is started to perform corresponding electric heating start-stop control; in another optional embodiment, when it is detected that the electrical heating is turned on in the multi-split system, a corresponding control program of the control method for electrical heating of the multi-split system according to the present invention is started, and step S10 and the following steps are executed, because the heat generation amount of the line is small when the electrical heating is not turned on in the multi-split system, the protection of the control method related to the present invention is not needed, and after the electrical heating is turned on, the output power is increased, which leads to the temperature rise of the bus of the internal machine, and the potential safety hazard is increased.
Optionally, after detecting that the electrical heating of all the internal machines in the multi-split system is turned off, the multi-split system may be immediately controlled to exit from the corresponding control program of the control method for electrical heating of the multi-split system of the present invention, or after the electrical heating of all the internal machines is turned off for a certain period of time, the multi-split system may be controlled to exit from the corresponding control program of the control method for electrical heating of the multi-split system of the present invention. The electric heating of all the internal machines is turned off based on the normal heating output regulating program of the multi-split air conditioner, but not based on the control method of the electric heating of the multi-split air conditioner system.
The current bus temperature of the internal machine can be acquired in real time, and the current bus temperature acquired in real time is used for subsequent judgment; the average value of the bus temperature of the internal machine, which is obtained in real time within a period of time, can also be calculated, and the average value is taken as the current bus temperature of the internal machine for subsequent judgment; the current internal bus temperature may also be acquired at regular intervals, for example, once every 2 seconds, and used for the determination in step S20.
Step S20, determining whether the internal machine bus temperature satisfies a first preset condition, where the first preset condition includes that the internal machine bus temperature is greater than or equal to a preset first temperature;
when the bus temperature of the internal machines meets a first preset condition, the lines in the multi-split system have safety risks, and the electric heating in one or more internal machines in the multi-split system needs to be turned off. The higher the temperature of the internal machine bus is, the greater the safety risk of the circuit is, and when the temperature of the internal machine bus is lower than a certain value, the circuit of the multi-split system has no safety risk, so that the first preset condition includes that the temperature of the internal machine bus is greater than or equal to a preset first temperature, wherein the first temperature is preset in the multi-split system, and can be selected as the temperature of the outer surface of the wire corresponding to the highest working temperature of the common wire insulating material, and can be selected from 55 ℃ to 65 ℃.
Optionally, the first preset condition includes that the internal engine bus temperature is greater than or equal to a preset first temperature, and further includes: the duration that the internal machine bus temperature is greater than or equal to the first temperature is greater than or equal to a preset second duration. Optionally, the second time period is 3-6 min. That is, after the bus temperature of the internal machine is greater than or equal to the first temperature and continues for a certain period of time, the electrical heating of one or more internal machines in the multi-split air-conditioning system is controlled to be turned off, so that control fluctuation caused by too fast change of the bus temperature of the internal machine can be avoided, for example, in a short time, the bus temperature of the internal machine continuously changes between greater than or equal to the first temperature and less than the first temperature, and the stability of the multi-split air-conditioning system is maintained.
When the bus temperature of the internal machine does not meet a first preset condition, for example, the bus temperature of the internal machine is lower than the first temperature, the normal electric heating start-stop control operation can be performed, and the temperature interval where the bus temperature of the internal machine is located can be further judged, and the operation corresponding to the temperature interval where the bus temperature of the internal machine is located is performed, for example, the electric heating of any internal machine is not actively closed, but the number of the internal machines for starting the electric heating is forbidden to be increased, or the electric heating is forbidden to be started again.
In an optional embodiment, the first preset condition includes that the bus temperature of the internal machine is greater than or equal to a preset first temperature, the duration is greater than or equal to a preset first duration, the current bus temperature of the internal machine is greater than the first temperature, but the duration is less than the first duration, and at this time, the number of internal machines for turning on the electric heating is prohibited to be increased again, or the electric heating is prohibited to be turned on again.
The prohibition of increasing the number of the internal machines for turning on the electric heating means that the number of the internal machines for turning on the electric heating is limited to the current level, that is, the number of the internal machines for turning on the electric heating is currently turned on, for example, if the number of the internal machines for turning on the electric heating is currently 3, the number of the internal machines for turning on the electric heating is limited to 3, if the number of the 3 internal machines for turning on the electric heating is currently turned on, the electric heating of the 4 th internal machine is not allowed to be turned on, and if one of the 3 internal machines for turning on the electric heating is turned off, the electric heating of one internal machine is allowed to be turned on.
The electric heating is prohibited from being turned on again, i.e., the electric heating must not be turned on again.
And step S30, if yes, controlling the electric heating of one or more internal machines of the multi-split air conditioning system to be closed.
If the bus temperature of the internal machine meets the first preset condition, the bus temperature of the internal machine is reduced, the circuit safety is protected, the current of one or more internal machines is reduced, and the reduction of the total current is realized.
Optionally, after the bus temperature of the internal machines meets the first preset condition, the electric heating of any one or more internal machines in the multi-split system can be directly turned off, so as to save a control program and achieve the purposes of reducing the bus current and reducing the bus temperature as soon as possible, wherein when the internal machines are turned off, the number of the turned-off internal machines can be preset in the multi-split system in advance; after the internal machine bus temperature is judged to meet the first preset condition, the following steps can be executed: determining the internal machines with power greater than the preset power in the multi-split system, reducing the electric heating power of the internal machines to the preset power, and then randomly turning off the electric heating of one or more internal machines to reduce the bus current to a greater extent so as to reduce the bus temperature more quickly; after the internal machine bus temperature is judged to meet the first preset condition, the following steps can be executed: the method comprises the steps of determining an inner machine with power larger than preset power in the multi-split air-conditioning system, reducing the electric heating power of the inner machine to the preset power, then randomly turning off the electric heating of one inner machine, detecting the bus temperature of the inner machine after a certain period of time, judging whether the bus temperature of the inner machine is smaller than a first temperature, if so, not turning off the electric heating of the inner machine, if the bus temperature of the inner machine is larger than or equal to the first temperature, then randomly turning off the electric heating of one inner machine, and then executing the steps of detecting the bus temperature of the inner machine and judging whether the bus temperature of the inner machine is smaller than the first temperature again after a certain period of time until the bus temperature of the inner machine is smaller than the first temperature.
Optionally, after it is determined that the bus temperature of the internal machine meets the first preset condition, the electrical heating of the internal machine meeting the preset condition may be turned off, where the internal machine meeting the preset condition may be the electrical heating with the minimum electrical heating output power or the minimum electrical heating output power of the preset number. The smaller the required electric heating output power is, the smaller the difference between the output of the refrigerant circulation heating quantity of the corresponding inner machine and the target heating quantity is, the minimum electric heating of the inner machine with the electric heating output power is closed, the influence on user experience is minimum, and the purpose of cooling the bus of the inner machine can be realized.
The method comprises the steps of obtaining the current bus temperature of an internal machine of the multi-split system; judging whether the bus temperature of the internal machine meets a first preset condition or not, wherein the first preset condition comprises that the bus temperature of the internal machine is greater than or equal to a preset first temperature; if so, controlling the electric heating of one or more internal machines of the multi-split air-conditioning system to be turned off, namely controlling the whole line temperature of the multi-split air-conditioning system through the bus temperature of the internal machines, and controlling the electric heating of the internal machines in the multi-split air-conditioning system to be turned off when the potential safety hazard exists in the line temperature of the multi-split air-conditioning system determined based on the bus temperature of the internal machines, so that the potential safety hazard caused by line aging or improper line selection is eliminated.
Optionally, as shown in fig. 2, step S30 specifically includes the following steps:
step S31, if the bus temperature of the internal machines meets a first preset condition, acquiring the set temperature of each internal machine in the multi-split air-conditioning system and the actual inner ring temperature of the acting space of each internal machine;
the inner machine acts on the space, namely the inner machine adjusts the target object of the temperature and humidity. The actual inner ring temperature of the inner machine acting space can be obtained through the temperature sensor in wired or wireless connection with the multi-split system, and the actual inner ring temperature obtaining mode of the inner machine acting space is not limited.
The set temperature of each internal machine, i.e., the target temperature set by the user.
Step S32, respectively calculating the absolute value of the difference between the set temperature of each internal machine and the actual inner ring temperature of the space where the internal machine is located;
and after the bus temperature of the internal machine meets a first preset condition, determining the internal machine to be electrically heated to be turned off according to the absolute value of the difference value between the set temperature of the internal machine and the actual inner ring temperature of the action space of the internal machine.
Step S33, determining the preset number of the internal machines with the minimum absolute value of the difference value, wherein the preset number is more than or equal to one;
the preset number of the internal machines with the minimum difference absolute value refers to the internal machines with the preset number of the difference absolute values after the difference absolute values corresponding to the internal machines are arranged from small to large.
The preset number is preset in the multi-split air conditioning system, and when the preset number is equal to one, the indoor unit with the minimum difference absolute value is selected.
And step S34, controlling the electric heating of the internal machines with the preset number before the minimum absolute value of the difference to be closed.
The smaller the difference absolute value of the actual inner ring temperature of the inner machine set temperature and the inner machine acting space is, the more difficultly the user can perceive the reduction of the temperature change speed, therefore, the electric heating of the inner machine with the minimum difference absolute value and the preset number is closed, the influence on the user experience can be reduced as much as possible, and thus, the influence on the comfort of the air conditioner can be reduced while the safety power utilization of the user is ensured.
Optionally, as shown in fig. 3, after the step S30, the method further includes the following steps:
step S40, judging whether the multi-split air-conditioning system meets a preset limit condition, wherein the preset limit condition comprises at least one of a first condition and a second condition, the first condition is that the duration of the internal machine bus temperature being greater than or equal to the first temperature is greater than or equal to a preset first duration, and the second condition is that the number of internal machines for turning off electric heating is greater than or equal to a first preset number because the internal machine bus temperature meets the first preset condition;
and step S50, if yes, controlling the electric heating of all the internal machines of the multi-split system to be closed.
When the multi-split system meets the preset limit condition, the circuit in the system is in an extremely dangerous state, and emergency measures need to be taken to avoid safety accidents. In each embodiment of the invention, the bus current of the internal machines of the multi-online system is quickly reduced by turning off the electric heating of all the internal machines, so that the bus temperature of the internal machines is quickly reduced.
When the preset limit condition is a first condition, namely the multi-split air conditioner system meets the condition that the temperature of the internal machine bus is greater than or equal to the first temperature and the duration is greater than the preset duration, the temperature is reduced by measures such as closing internal machine electric heating after the temperature of the internal machine bus is greater than or equal to the first temperature, and if the duration of the internal machine bus temperature is greater than or equal to the first temperature, the internal machine bus temperature is not caused by overlarge output power of the opened electric heating, and the circuit has obvious problems such as too small line type. At this time, the electric heating of all the internal machines needs to be controlled to be closed.
Similarly, when the preset limit condition is the second condition, if the bus temperature of the internal machines meets the first preset condition, the plurality of internal machines are turned off for reducing the bus temperature of the internal machines, and if the number of the internal machines for turning off the electric heating is large, the circuit has obvious problems.
When the preset limit conditions are the first condition and the second condition, if the plurality of internal machine electric heaters are turned off for reducing the internal machine bus temperature and the number of internal machines which are turned off for electric heating is large, the internal machine bus temperature still cannot be reduced, which indicates that the circuit has obvious problems.
Optionally, after the multi-split air conditioner system meets the preset limit condition, the multi-split air conditioner system turns off the electric heating of all the internal machines, and can report the line configuration too small fault, which can be represented as a fault code displayed by the lamp panel or regular flashing of the lamp panel, so as to warn relevant personnel to perform corresponding processing.
Through setting up and predetermine the limit condition, can diagnose the improper problem of circuit lectotype, also can take urgent measure when reducing that this measure of interior machine electrical heating can't be quick, effectively remedy the circuit temperature to avoid accident's emergence, strengthen the safety precaution.
Optionally, as shown in fig. 4, after the step S40, the method further includes the following steps:
and if the multi-split air conditioner system does not meet the preset limit condition, returning to the step of acquiring the current internal machine bus temperature of the multi-split air conditioner system.
If the multi-split system does not meet the preset limit condition, whether the system line is in an extremely dangerous state or not cannot be judged, and at this time, the step S10 can be executed to continue to detect and control the line condition, so that safety precaution under the normal working state of the multi-split system is realized.
Optionally, as shown in fig. 5, after the step S20, the method further includes the following steps:
step S60, if the internal machine bus temperature does not satisfy the first preset condition, determining whether the internal machine bus temperature satisfies a second preset condition, where the second preset condition includes that the internal machine bus temperature is greater than or equal to a preset second temperature, and the second temperature is less than the first temperature;
if the internal machine bus temperature does not meet the first preset condition, whether the internal machine bus temperature meets the second preset condition can be further judged. When the bus temperature of the internal machine meets a first preset condition, the bus temperature of the internal machine is high, the bus temperature of the internal machine is reduced by turning off the electric heating of the internal machine, and when the bus temperature of the internal machine does not meet the first preset condition, the bus temperature of the internal machine is lower than the first temperature and is larger than or equal to a preset second temperature, namely, the bus temperature of the internal machine is not too low, a control measure needs to be taken to slow down the rising speed of the bus temperature of the internal machine, and the bus temperature of the internal machine is prevented from meeting the first preset condition in a short time.
Optionally, the difference between the first temperature minus the second temperature is between 13 ℃ and 18 ℃.
And step S70, if the bus temperature of the internal machines meets the second preset condition, limiting the number of the internal machines for starting the electric heating to a second preset number or forbidding to start the electric heating of any internal machine again.
The more the number of the internal machines for starting the electric heating is, the larger the total output power of the system is, the larger the bus current is, and further the higher the internal machine bus temperature is, the speed of the internal machine bus temperature rising is slowed down, and when the internal machine bus temperature meets a second preset condition, the starting of the internal machine electric heating is limited.
The method for limiting the on-off of the internal machine electric heating specifically comprises the following steps: and limiting the number of the internal machines for starting the electric heating to a second preset number. Optionally, the second preset number is the number of internal machines which have started electric heating currently. For example, if the number of the internal machines which have been currently turned on for electrical heating is 3, the number of the internal machines which have been turned on for electrical heating is limited to 3, if the electrical heating has been turned on for 3 internal machines, the electrical heating of the 4 th internal machine is not allowed to be turned on again, and if one of the 3 internal machines which have been turned on for electrical heating is turned off, the electrical heating of one internal machine is allowed to be turned on again.
The method for limiting the opening of the internal machine electric heating specifically comprises the following steps: the electric heating of any internal machine is prohibited to be turned on again. I.e. there must no longer be an operation to switch on the electric heating.
The invention also provides a control device for the electric heating of the multi-split system. Fig. 6 is a schematic diagram of an embodiment of the control device. As shown in fig. 6, the control device includes:
an obtaining unit 101, configured to obtain a current internal machine bus temperature of the multi-split air conditioning system;
a determining unit 102, configured to determine whether the internal bus temperature meets a first preset condition, where the first preset condition includes that the internal bus temperature is greater than or equal to a preset first temperature;
and the control unit 103 is used for controlling the electric heating of one or more internal machines of the multi-split air conditioning system to be turned off if the bus temperature of the internal machines meets a first preset condition.
Optionally, the control unit 103 is further configured to obtain a set temperature of each internal machine in the multi-split air-conditioning system and an actual inner ring temperature of each internal machine operating space; respectively calculating the absolute value of the difference between the set temperature of each internal machine and the actual inner ring temperature of the space where the internal machine is located; determining a preset number of the internal machines with the minimum absolute difference value, wherein the preset number is more than or equal to one; and controlling the electric heating of the internal machines with the preset number before the minimum absolute value of the difference value to be closed.
Optionally, the determining unit 102 is further configured to determine whether the multiple on-line system meets a preset limit condition, where the preset limit condition includes at least one of a first condition and a second condition, the first condition is that a duration of the internal machine bus temperature being greater than or equal to the first temperature is greater than or equal to a preset first duration, and the second condition is that the number of internal machines turning off the electrical heating due to the internal machine bus temperature meeting the first preset condition is greater than or equal to a first preset number; if yes, the control unit 103 controls the electrical heating of all the internal machines of the multi-split air conditioning system to be turned off.
Optionally, if the multi-split air-conditioning system does not meet the preset limit condition, the control unit 103 controls to return to execute the step of obtaining the current internal machine bus temperature of the multi-split air-conditioning system.
Optionally, the determining unit 102 is further configured to determine whether the internal bus temperature meets a second preset condition when the internal bus temperature does not meet a first preset condition, where the second preset condition includes that the internal bus temperature is greater than or equal to a preset second temperature, and the second temperature is less than the first temperature; and if the bus temperature of the internal machines meets the second preset condition, limiting the number of the internal machines for starting the electric heating to a second preset number or forbidding to start the electric heating of any internal machine again by the control unit.
Optionally, the second preset number is the number of internal machines which have started electric heating currently.
Optionally, the first preset condition further includes that a duration of the internal machine bus temperature being greater than or equal to the first temperature is greater than or equal to a preset second duration.
The invention also provides a multi-split system. Fig. 7 is a schematic diagram of an embodiment of the multi-split system, and as shown in fig. 7, the multi-split system includes a computer readable storage medium 201 storing a computer program and a processor 202, and the computer program is read and executed by the processor 202 to implement the method for controlling the electric heating of the multi-split system according to the above embodiments.
The multi-split system further comprises a temperature detection device, and the temperature detection device is arranged at the bus of the multi-split system internal unit. The temperature detection device can be a component such as a thermal relay or a thermistor.
Heating wires can be arranged in front of or behind air outlets of the indoor units of the multi-split air conditioning system and used for electric heating.
The present invention also provides a computer-readable storage medium, comprising: the computer-readable storage medium stores a computer program, which is read and executed by a processor to implement the method for controlling electric heating of a multi-split air conditioning system according to the above embodiments.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
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| CN111692700A (en) * | 2020-06-02 | 2020-09-22 | 宁波奥克斯电气股份有限公司 | Multi-split electric heating control method and device, storage medium and air conditioner |
| CN113465022B (en) * | 2021-07-08 | 2022-08-19 | 宁波奥克斯电气股份有限公司 | Electric auxiliary heat control method and device and multi-split air conditioner |
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