CN108195034B - Control method and device of inner unit, inner unit and multi-connected air conditioner - Google Patents
Control method and device of inner unit, inner unit and multi-connected air conditioner Download PDFInfo
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- CN108195034B CN108195034B CN201711298895.1A CN201711298895A CN108195034B CN 108195034 B CN108195034 B CN 108195034B CN 201711298895 A CN201711298895 A CN 201711298895A CN 108195034 B CN108195034 B CN 108195034B
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
Abstract
The invention provides an internal unit control method and device, an internal unit and a multi-connected air conditioner. The control method of the internal machine comprises the following steps: when the plurality of internal machines are shut down, judging whether the current internal machine is the last shut down internal machine; and when the judgment result is yes, controlling the electronic expansion valve of the current internal machine to be opened to the standby opening degree when a stop signal sent by the external machine is received. According to the technical scheme, on one hand, the pressure difference of the high-pressure side and the low-pressure side of the whole system can be balanced, the multi-split system can be restarted, on the other hand, on the basis of the original main control board hardware, the air flow balance noise can be quickly and effectively eliminated only by changing a software program without increasing the cost, so that the user satisfaction is improved, and the market demand is quickly responded.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of an internal unit, a control device of the internal unit, a multi-connected air conditioner, computer equipment and a computer readable storage medium.
Background
A multi-connected air conditioning system generally consists of an external unit and a plurality of internal units. Each internal machine is provided with an electronic expansion valve, so that the internal machines can be independently opened and closed and the flow of the refrigerant can be adjusted.
After the external machine is stopped, in order to ensure that the pressure difference between the exhaust side and the return side (i.e., the high-low pressure side) of the compressor is smaller than the design pressure difference when the whole multi-split system is restarted, the current method is that when the external machine needs to be zero, all internal machines are completely closed and then are opened to the standby opening again, and the pressure difference between the high-low pressure side and the low-pressure side of the compressor is bypassed by the internal machines. However, the external machine needs to be just zero, the pressure difference of the high-pressure side and the low-pressure side of the whole system is large, and the electronic expansion valve of the internal machine is opened to the initial opening immediately, so that a lot of 'swishing' noise is generated due to the air flow scouring, and the use comfort of the air conditioner is influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, an aspect of the present invention is to provide a control method of an internal machine.
Another aspect of the present invention is to provide a control apparatus of an internal machine.
Yet another aspect of the present invention is to provide an internal combustion engine. Another aspect of the present invention is to provide a multi-connected air conditioner.
Yet another aspect of the present invention is to provide a computer apparatus.
Yet another aspect of the present invention is to provide a computer-readable storage medium.
In view of the above, the present invention provides a method for controlling an indoor unit, which is used for a multi-split air conditioner including at least one outdoor unit and a plurality of indoor units connected to the at least one outdoor unit, the method comprising: when the plurality of internal machines are shut down, judging whether the current internal machine is the last shut down internal machine; and when the judgment result is yes, controlling the electronic expansion valve of the current internal machine to be opened to the standby opening degree when a stop signal sent by the external machine is received.
According to the control method of the multi-connected air conditioner, when the multi-connected air conditioner is shut down, the last closed inner machine is found, when the outer machine is determined to be closed, the opening degree of the inner machine is immediately opened to the standby opening degree, and other closed inner machines keep the current opening degree unchanged, so that on one hand, the pressure difference of the high-pressure side and the low-pressure side of the whole system can be balanced, the multi-connected air conditioner can be restarted, and on the other hand, on the basis of original main control board hardware, only software programs need to be changed, cost does not need to be increased, airflow balance noise can be quickly and effectively eliminated, accordingly, user satisfaction is improved, and market requirements are quickly responded.
In addition, according to the control method of the multi-split air conditioner of the present invention, the following additional technical features may be further provided:
in the above technical solution, preferably, the step of determining whether the current internal machine is the last internal machine that is shut down includes: judging whether the current internal machine function needs to be zero or not, if so, starting timing to obtain a first timing variable, and judging whether a signal of stopping the external machine is received or not; when the judgment result is yes, judging whether the first timing variable is smaller than a first preset time or not; and when the first timing variable is smaller than the first preset time, judging that the current indoor unit is the last stopped indoor unit.
In the technical scheme, when the inner machine reaches a set temperature or the running state is a fault or shutdown state, namely the inner machine needs to be zero, timing is started at the moment, then whether the outer machine is shut down is judged, when a signal that the outer machine is shut down is received, whether a first timing variable is smaller than a first preset time is compared, wherein the first preset time is designed according to the time required by one-time communication between the inner machine and the outer machine, and if the first timing variable is smaller than the first preset time, the current inner machine can be determined to be the last closed inner machine. The control method provided by the invention judges whether the current indoor unit is the last closed indoor unit or not by calculating the time from the closing of the indoor unit to the closing signal of the outdoor unit, when the shutdown of the outdoor unit is determined, the electronic expansion valve of the last closed indoor unit is immediately opened to the standby opening degree, and other closed indoor units keep the current opening degree unchanged, so that the cost is not increased, the airflow balance noise of the multi-split indoor unit when the electronic expansion valve is opened can be quickly reduced, the use comfort of the air conditioner is improved, and the market demand can be quickly responded.
In any one of the above technical solutions, preferably, when the determination result of determining whether the signal indicating that the external unit is stopped is yes, the control method further includes: starting timing to obtain a second timing variable; and when the judgment result of judging whether the first timing variable is smaller than the first preset time is greater than or equal to the first preset time, controlling the current internal machine to keep the current opening, and opening to the standby opening after the second timing variable reaches the second preset time.
In the technical scheme, if the time from the turning-off of the internal machine to the turning-off of the external machine is determined to be more than or equal to the first preset time, then the current internal machine is judged not to be the last closed internal machine, the current opening degree of the current internal machine is controlled to be kept unchanged, the current internal machine is controlled to be opened to the standby opening degree after the second timing variable reaches the second preset time, wherein the second preset time is designed according to the shortest time for restarting the multi-connected air conditioner after the shutdown, thus, when the external machine is stopped, only one internal machine is needed to bypass the pressure difference of the high-pressure side and the low-pressure side of the compressor, the pressure difference of the high-pressure side and the low-pressure side of the compressor does not need to be bypassed by all the inner machines, and the inner machines are also the inner machines which are closed finally, therefore, the air flow balance noise generated when the electronic expansion valve of the multi-split air conditioner indoor unit is opened can be quickly and effectively eliminated, the multi-split air conditioner system can be restarted, and the reliable operation of the system is guaranteed.
In any of the above technical solutions, preferably, the value range of the first preset time is: 15S to 30S; the value range of the second preset time is as follows: 5min to 7 min.
In the technical solution, the first preset time is designed according to a time required for performing one-time communication between the internal and external units, and preferably ranges from 15S to 30S, but is not limited thereto; the second preset time is designed according to the shortest time for restarting the multi-connected air conditioner after the shutdown, and the value of the second preset time is generally greater than 1min, and preferably ranges from 5min to 7min, but is not limited thereto.
In any of the above technical solutions, preferably, when the determination result of determining whether the current internal machine function needs to be zero is zero, it is determined whether the opening degree of the electronic expansion valve of the current internal machine is already zero, and if not, the opening degree is assigned to be zero, and the first timing variable is assigned to be zero; and when the judgment result of judging whether the signal for stopping the outdoor unit is received is yes, judging whether the energy requirement of the outdoor unit is zero, if not, assigning the energy requirement of the outdoor unit to be zero, and assigning the second timing variable to be zero.
In the technical scheme, when the energy requirement of the current internal machine is zero, the timing starting point of the first timing variable is determined by judging whether the opening degree of the electronic expansion valve of the internal machine is zero, specifically, if the opening degree of the electronic expansion valve is not zero, it is indicated that the internal machine is just closed, at this time, the opening degree is assigned to zero, and the first timing variable is assigned to zero, so that the timing starting point is determined (i.e., the first timing variable is cleared first and then is timed again). Similarly, when the current internal unit receives a signal that the external unit is stopped, the timing starting point of the second timing variable is determined by judging whether the energy requirement of the external unit is already zero, specifically, if the energy requirement of the external unit is not zero, it indicates that the external unit is just stopped, and at this time, the energy requirement of the external unit is assigned to zero, and the second timing variable is assigned to zero, so as to determine the delay timing starting point (i.e., the second timing variable is cleared first and then is re-timed).
The invention also provides an indoor unit control device, which is used for a multi-connected air conditioner, the multi-connected air conditioner comprises at least one outdoor unit and a plurality of indoor units connected with the at least one outdoor unit, and the control device comprises: the judging unit is used for judging whether the current internal machine is the last internal machine to be stopped when the plurality of internal machines are stopped; and the control unit is used for controlling the electronic expansion valve of the internal machine which is stopped at last to be opened to the standby opening degree when the judgment result is yes and the stop signal sent by the external machine is received.
According to the control device of the multi-split air conditioner, when the multi-split air conditioner is shut down, the last closed inner machine is found, when the outer machine is determined to be closed, the opening degree of the inner machine is immediately opened to the standby opening degree, and other closed inner machines keep the current opening degree unchanged, so that on one hand, the pressure difference of the high-pressure side and the low-pressure side of the whole system can be balanced, the multi-split air conditioner can be restarted, and on the other hand, on the basis of original main control board hardware, only a software program needs to be changed, cost does not need to be increased, airflow balance noise can be quickly and effectively eliminated, accordingly, user satisfaction is improved, and market requirements are quickly responded.
In the foregoing technical solution, preferably, the determining unit is specifically configured to: judging whether the current internal machine function needs to be zero or not, if so, starting timing to obtain a first timing variable, and judging whether a signal of stopping the external machine is received or not; when the judgment result is yes, judging whether the first timing variable is smaller than a first preset time or not; and when the first timing variable is smaller than the first preset time, judging that the current indoor unit is the last stopped indoor unit.
In the technical scheme, when the inner machine reaches a set temperature or the running state is a fault or shutdown state, namely the inner machine needs to be zero, timing is started at the moment, then whether the outer machine is shut down is judged, when a signal that the outer machine is shut down is received, whether a first timing variable is smaller than a first preset time is compared, wherein the first preset time is designed according to the time required by one-time communication between the inner machine and the outer machine, and if the first timing variable is smaller than the first preset time, the current inner machine can be determined to be the last closed inner machine. The control method provided by the invention judges whether the current indoor unit is the last closed indoor unit or not by calculating the time from the closing of the indoor unit to the closing signal of the outdoor unit, when the shutdown of the outdoor unit is determined, the electronic expansion valve of the last closed indoor unit is immediately opened to the standby opening degree, and other closed indoor units keep the current opening degree unchanged, so that the cost is not increased, the airflow balance noise of the multi-split indoor unit when the electronic expansion valve is opened can be quickly reduced, the use comfort of the air conditioner is improved, and the market demand can be quickly responded.
In any one of the above technical solutions, preferably, when the determination result of determining whether the signal indicating that the external unit is stopped is yes, the control unit is further configured to: starting timing to obtain a second timing variable; and when the judgment result of judging whether the first timing variable is smaller than the first preset time is greater than or equal to the first preset time, controlling the current internal machine to keep the current opening, and opening to the standby opening after the second timing variable reaches the second preset time.
In the technical scheme, if the time from the turning-off of the internal machine to the turning-off of the external machine is determined to be more than or equal to the first preset time, then the current internal machine is judged not to be the last closed internal machine, the current opening degree of the current internal machine is controlled to be kept unchanged, the current internal machine is controlled to be opened to the standby opening degree after the second timing variable reaches the second preset time, wherein the second preset time is designed according to the shortest time for restarting the multi-connected air conditioner after the shutdown, thus, when the external machine is stopped, only one internal machine is needed to bypass the pressure difference of the high-pressure side and the low-pressure side of the compressor, the pressure difference of the high-pressure side and the low-pressure side of the compressor does not need to be bypassed by all the inner machines, and the inner machines are also the inner machines which are closed finally, therefore, the air flow balance noise generated when the electronic expansion valve of the multi-split air conditioner indoor unit is opened can be quickly and effectively eliminated, the multi-split air conditioner system can be restarted, and the reliable operation of the system is guaranteed.
In any of the above technical solutions, preferably, the value range of the first preset time is: 15S to 30S; the value range of the second preset time is as follows: 5min to 7 min.
In the technical solution, the first preset time is designed according to a time required for performing one-time communication between the internal and external units, and preferably ranges from 15S to 30S, but is not limited thereto; the second preset time is designed according to the shortest time for restarting the multi-connected air conditioner after the shutdown, and the value of the second preset time is generally greater than 1min, and preferably ranges from 5min to 7min, but is not limited thereto.
In any of the above technical solutions, preferably, the timing unit is configured to determine whether a determination result that the current internal machine function needs to be zero is zero, and then determine whether an opening degree of an electronic expansion valve of the current internal machine is already zero, if the opening degree is not zero, assign the opening degree to zero, and assign the first timing variable to zero; and the timing unit is also used for judging whether the energy requirement of the external unit is zero or not when the judgment result of judging whether the signal for stopping the external unit is received is yes, assigning the energy requirement of the external unit to be zero if the energy requirement of the external unit is not zero, and assigning the second timing variable to be zero.
In the technical scheme, when the energy requirement of the current internal machine is zero, the timing starting point of the first timing variable is determined by judging whether the opening degree of the electronic expansion valve of the internal machine is zero, specifically, if the opening degree of the electronic expansion valve is not zero, it is indicated that the internal machine is just closed, at this time, the opening degree is assigned to zero, and the first timing variable is assigned to zero, so that the timing starting point is determined (i.e., the first timing variable is cleared first and then is timed again). Similarly, when the current internal unit receives a signal that the external unit is stopped, the timing starting point of the second timing variable is determined by judging whether the energy requirement of the external unit is already zero, specifically, if the energy requirement of the external unit is not zero, it indicates that the external unit is just stopped, and at this time, the energy requirement of the external unit is assigned to zero, and the second timing variable is assigned to zero, so as to determine the delay timing starting point (i.e., the second timing variable is cleared first and then is re-timed).
The invention also provides an internal machine, which comprises: the control device for an internal machine according to any one of the above-described embodiments.
The invention also provides a multi-connected air conditioner, which comprises at least one outdoor unit, and a plurality of indoor units connected with the at least one outdoor unit in the embodiment or the control device of the indoor unit in any one of the technical schemes.
According to the multi-connected air conditioner, the control device of the internal unit in any one of the above technical schemes is adopted, so that the control device of the internal unit has all the beneficial effects, and the details are not repeated.
In a fourth aspect of the invention, a computer device is proposed, which comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the processor being adapted to perform the steps of the method according to any of the above-mentioned claims.
According to the computer device of the present invention, the processor included therein is configured to execute the steps of the method for controlling the internal machine in any one of the above technical solutions, so that the computer device can achieve all the beneficial effects of the method for controlling the internal machine, and details are not described herein again.
In a fifth aspect of the present invention, a computer-readable storage medium is presented, on which a computer program is stored, which computer program, when being executed by a processor, performs the steps of the method according to any one of the preceding claims.
According to the computer-readable storage medium of the present invention, when being executed by the processor, the computer program stored thereon implements the steps of the method for controlling the internal machine according to any of the above technical solutions, so that the computer-readable storage medium can implement all the beneficial effects of the method for controlling the internal machine, and details are not repeated herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a flow chart of a control method of an internal machine according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a control method of an internal machine according to another embodiment of the present invention;
fig. 3 is a flowchart illustrating a control method of an internal machine according to still another embodiment of the present invention;
fig. 4 shows a flow chart of a control method of an internal machine according to yet another embodiment of the present invention;
fig. 5 shows a schematic block diagram of a control device of an internal machine according to an embodiment of the present invention;
fig. 6 shows a schematic block diagram of a control device of an internal machine according to another embodiment of the present invention;
FIG. 7 illustrates a schematic block diagram of a multi-connected air conditioner according to one embodiment of the present invention;
fig. 8 is a flowchart illustrating a control method of an internal machine according to an embodiment of the present invention;
FIG. 9 shows a schematic diagram of a computer device according to an embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1, a flow chart of a control method of an internal machine according to an embodiment of the present invention is schematically shown. The multi-connected air conditioner comprises at least one outdoor unit and a plurality of indoor units connected with the at least one outdoor unit, and the control method comprises the following steps:
and 104, when the judgment result is yes, controlling the electronic expansion valve of the current internal machine to be opened to a standby opening degree when a stop signal sent by the external machine is received.
According to the control method of the internal machine, when the multi-online system is stopped, the last closed internal machine is found, the opening degree of the internal machine is immediately opened to the standby opening degree when the external machine is determined to be closed, and other closed internal machines keep the current opening degree unchanged, so that on one hand, the pressure difference of the high-pressure side and the low-pressure side of the whole system can be balanced, the multi-online system can be restarted, on the other hand, on the basis of the original main control board hardware, the air flow balance noise can be quickly and effectively eliminated only by changing a software program without increasing the cost, the user satisfaction is improved, and the market demand is quickly responded.
As shown in fig. 2, a flow chart of a control method of an internal machine according to another embodiment of the present invention is schematically shown. The multi-connected air conditioner comprises at least one outdoor unit and a plurality of indoor units connected with the at least one outdoor unit, and the control method comprises the following steps:
and step 210, when the judgment result is that the first timing variable is smaller than the first preset time, judging that the current internal machine is the last stopped internal machine, and controlling the electronic expansion valve of the current internal machine to be opened to the standby opening.
In this embodiment, when the internal unit reaches a set temperature or the operating state is a fault or a shutdown state, that is, the internal unit needs to be zero, timing is started at this time, and then whether the external unit is shutdown is determined, when a signal that the external unit is shutdown is received, whether a first timing variable is smaller than a first preset time is compared, where the first preset time is designed according to time required for one-time communication between the internal unit and the external unit, and if the first timing variable is smaller than the first preset time, it can be determined that the current internal unit is the last closed internal unit. The control method provided by the invention judges whether the current indoor unit is the last closed indoor unit or not by calculating the time from the closing of the indoor unit to the closing signal of the outdoor unit, when the shutdown of the outdoor unit is determined, the electronic expansion valve of the last closed indoor unit is immediately opened to the standby opening degree, and other closed indoor units keep the current opening degree unchanged, so that the cost is not increased, the airflow balance noise of the multi-split indoor unit when the electronic expansion valve is opened can be quickly reduced, the use comfort of the air conditioner is improved, and the market demand can be quickly responded.
As shown in fig. 3, a flow chart of a control method of an internal machine according to still another embodiment of the present invention is schematically shown. The multi-connected air conditioner comprises at least one outdoor unit and a plurality of indoor units connected with the at least one outdoor unit, and the control method comprises the following steps:
and step 314, when the judgment result of judging whether the first timing variable is smaller than the first preset time is larger than or equal to the first preset time, controlling the current internal machine to keep the current opening, and opening to the standby opening after the second timing variable reaches the second preset time.
In this embodiment, if the time from when the internal unit is turned off to when the external unit is determined to be turned off is greater than or equal to the first preset time, then the current internal machine is judged not to be the last closed internal machine, the current opening degree of the current internal machine is controlled to be kept unchanged, the current internal machine is controlled to be opened to the standby opening degree after the second timing variable reaches the second preset time, wherein the second preset time is designed according to the shortest time for restarting the multi-connected air conditioner after the shutdown, thus, when the external machine is stopped, only one internal machine is needed to bypass the pressure difference of the high-pressure side and the low-pressure side of the compressor, the pressure difference of the high-pressure side and the low-pressure side of the compressor does not need to be bypassed by all the inner machines, and the inner machines are also the inner machines which are closed finally, therefore, the air flow balance noise generated when the electronic expansion valve of the multi-split air conditioner indoor unit is opened can be quickly and effectively eliminated, the multi-split air conditioner system can be restarted, and the reliable operation of the system is guaranteed.
In any of the above embodiments, preferably, the value range of the first preset time is: 15S to 30S; the value range of the second preset time is as follows: 5min to 7 min.
In this embodiment, the first preset time is designed according to a time required for communication between the internal unit and the external unit, and is preferably in a range from 15S to 30S, but not limited thereto; the second preset time is designed according to the shortest time for restarting the multi-connected air conditioner after the shutdown, and the value of the second preset time is generally greater than 1min, and preferably ranges from 5min to 7min, but is not limited thereto.
As shown in fig. 4, a flow chart of a control method of an internal machine according to another embodiment of the present invention is schematically shown. The multi-connected air conditioner comprises at least one outdoor unit and a plurality of indoor units connected with the at least one outdoor unit, and the control method comprises the following steps:
and 418, when the judgment result of judging whether the timing variable is smaller than the first preset time is greater than or equal to the first preset time, controlling the current internal machine to keep the current opening, and opening to the standby opening after the timing variable reaches the second preset time.
In this embodiment, when the energy requirement of the current internal unit is zero, the timing start point of the first timing variable is determined by determining whether the opening degree of the electronic expansion valve of the internal unit is zero, specifically, if the opening degree of the electronic expansion valve is not zero, it indicates that the internal unit has just been closed, and at this time, the timing start point is determined by assigning the opening degree to zero and assigning the first timing variable to zero (i.e., clearing the first timing variable first and then re-timing). Similarly, when the current internal unit receives a signal that the external unit is stopped, the timing starting point of the second timing variable is determined by judging whether the energy requirement of the external unit is already zero, specifically, if the energy requirement of the external unit is not zero, it indicates that the external unit is just stopped, and at this time, the energy requirement of the external unit is assigned to zero, and the second timing variable is assigned to zero, so as to determine the delay timing starting point (i.e., the second timing variable is cleared first and then is re-timed).
As shown in fig. 5, a schematic block diagram of a control apparatus of an internal machine according to an embodiment of the present invention. Wherein, this multi-connected air conditioner includes at least one outer machine and a plurality of interior machines of being connected with at least one outer machine, and this controlling means 500 includes:
a determining unit 502, configured to determine, when the multiple internal machines are stopped, whether a current internal machine is the last internal machine that is stopped;
and a control unit 504, configured to, when the determination result is yes, control the electronic expansion valve of the internal unit that is stopped last to be opened to the standby opening when the stop signal sent by the external unit is received.
According to the control device 500 of the internal machine, when the multi-online system is stopped, the last closed internal machine is found, when the external machine is determined to be closed, the opening degree of the internal machine is immediately opened to the standby opening degree, and other closed internal machines keep the current opening degree unchanged, so that on one hand, the pressure difference of the high-pressure side and the low-pressure side of the whole system can be balanced, the multi-online system can be restarted, and on the other hand, on the basis of the original main control board hardware, the air flow balance noise can be quickly and effectively eliminated only by changing a software program without increasing the cost, so that the user satisfaction is improved, and the market demand is quickly responded.
In the foregoing embodiment, preferably, the determining unit 502 is specifically configured to: judging whether the current internal machine function needs to be zero or not, if so, starting timing to obtain a first timing variable, and judging whether a signal of stopping the external machine is received or not; when the judgment result is yes, judging whether the first timing variable is smaller than a first preset time or not; and when the first timing variable is smaller than the first preset time, judging that the current indoor unit is the last stopped indoor unit.
In this embodiment, when the internal unit reaches a set temperature or the operating state is a fault or a shutdown state, that is, the internal unit needs to be zero, timing is started at this time, and then whether the external unit is shutdown is determined, when a signal that the external unit is shutdown is received, whether a first timing variable is smaller than a first preset time is compared, where the first preset time is designed according to time required for one-time communication between the internal unit and the external unit, and if the first timing variable is smaller than the first preset time, it can be determined that the current internal unit is the last closed internal unit. The control method provided by the invention judges whether the current indoor unit is the last closed indoor unit or not by calculating the time from the closing of the indoor unit to the closing signal of the outdoor unit, when the shutdown of the outdoor unit is determined, the electronic expansion valve of the last closed indoor unit is immediately opened to the standby opening degree, and other closed indoor units keep the current opening degree unchanged, so that the cost is not increased, the airflow balance noise of the multi-split indoor unit when the electronic expansion valve is opened can be quickly reduced, the use comfort of the air conditioner is improved, and the market demand can be quickly responded.
In any of the above embodiments, preferably, when the determination result of determining whether the signal for stopping the external unit is received is yes, the control unit 504 is further configured to: starting timing to obtain a second timing variable; and when the judgment result of judging whether the first timing variable is smaller than the first preset time is greater than or equal to the first preset time, controlling the current internal machine to keep the current opening, and opening to the standby opening after the second timing variable reaches the second preset time.
In this embodiment, if the time from when the current internal machine is turned off to when it is determined that the external machine is turned off is greater than or equal to a first preset time, where the first preset time is designed according to the time required for one-time communication between the internal machine and the external machine, it may be determined that the current internal machine is not the last internal machine that is turned off, and at this time, the current internal machine is controlled to keep the current opening unchanged, and is then turned on to the standby opening after the timing variable reaches a second preset time, where the second preset time is designed according to the shortest time for restarting the multi-split air conditioner after being turned off. By the control method, the air flow balance noise when the electronic expansion valve of the multi-split indoor unit is opened can be quickly and effectively eliminated, the multi-split system can be restarted, and the reliable operation of the system is ensured.
In any of the above embodiments, preferably, the value range of the first preset time is: 15S to 30S; the value range of the second preset time is as follows: 5min to 7 min.
In this embodiment, the first preset time is designed according to a time required for communication between the internal unit and the external unit, and is preferably in a range from 15S to 30S, but not limited thereto; the second preset time is designed according to the shortest time for restarting the multi-connected air conditioner after the shutdown, and the value of the second preset time is generally greater than 1min, and preferably ranges from 5min to 7min, but is not limited thereto.
As shown in fig. 6, a schematic block diagram of a control apparatus of an internal machine according to another embodiment of the present invention. Wherein, this multi-connected air conditioner includes at least one outer machine and a plurality of interior machines of being connected with at least one outer machine, and this controlling means 600 includes:
a determining unit 602, configured to determine, when the multiple internal machines are stopped, whether a current internal machine is the last internal machine that is stopped;
the determining unit 602 is specifically configured to: judging whether the current internal machine function needs to be zero or not, if so, starting timing to obtain a first timing variable, and judging whether a signal of stopping the external machine is received or not; when the judgment result is yes, judging whether the first timing variable is smaller than a first preset time or not; when the first timing variable is smaller than the first preset time, judging that the current indoor unit is the last stopped indoor unit;
the control unit 604 is configured to, when the determination result is yes and a shutdown signal sent by the external unit is received, control the electronic expansion valve of the internal unit that is finally shutdown to be opened to the standby opening;
when the determination result of determining whether the signal indicating that the external unit is stopped is received is yes, the control unit 604 is further configured to: starting timing to obtain a second timing variable; when the judgment result of judging whether the first timing variable is smaller than the first preset time is greater than or equal to the first preset time, controlling the current internal machine to keep the current opening, and opening to the standby opening after the second timing variable reaches the second preset time;
the control device 600 further includes: a timing unit 606, configured to determine whether the determination result indicating that the current internal machine function needs to be zero is zero, and then determine whether the opening degree of the electronic expansion valve of the current internal machine is already zero, if not, assign the opening degree to zero, and assign a first timing variable to zero; and a timing unit 606, further configured to determine whether the energy requirement of the external unit is already zero when the determination result that the signal indicating that the external unit is stopped is determined to be yes, assign the energy requirement of the external unit to zero if the energy requirement of the external unit is not zero, and assign a second timing variable to zero.
In this embodiment, when the energy requirement of the current internal unit is zero, the timing start point of the first timing variable is determined by determining whether the opening degree of the electronic expansion valve of the internal unit is zero, specifically, if the opening degree of the electronic expansion valve is not zero, it indicates that the internal unit has just been closed, and at this time, the timing start point is determined by assigning the opening degree to zero and assigning the first timing variable to zero (i.e., clearing the first timing variable first and then re-timing). Similarly, when the current internal unit receives a signal that the external unit is stopped, the timing starting point of the second timing variable is determined by judging whether the energy requirement of the external unit is already zero, specifically, if the energy requirement of the external unit is not zero, it indicates that the external unit is just stopped, and at this time, the energy requirement of the external unit is assigned to zero, and the second timing variable is assigned to zero, so as to determine the delay timing starting point (i.e., the second timing variable is cleared first and then is re-timed).
An embodiment of the third aspect of the present invention further provides an internal unit, including: the control device for an internal machine according to any one of the above embodiments.
As shown in fig. 7, a schematic block diagram of a multi-connected air conditioner according to an embodiment of the present invention. Wherein, this multi-connected air conditioner 700, including at least one outer machine and with a plurality of interior machines of at least one outer machine connection, still include: the control device 702 of the internal machine according to any one of the above embodiments.
The multi-split air conditioner 700 provided by the present invention employs the control device 702 of the indoor unit as in any one of the above embodiments, so that the control device 702 of the indoor unit has all the effective effects, and the details are not repeated herein.
The specific embodiment is as follows: there is provided a method for adjusting an electronic expansion valve when an air conditioner is shut down, comprising the following steps, as shown in fig. 8:
in step 818, the electronic expansion valve sets the opening PMVSet to a standby opening.
Wherein, the standby opening degree may be preferably set to 300P; the time T is designed according to one-time communication time between the internal machine and the external machine, taking 25S as an example; tdelay is more than or equal to 1min and is less than the shortest time for restarting the multi-connected external unit after the shutdown.
In the embodiment, the time from the closing of the inner unit to the closing of the outer unit is calculated through the communication between the inner unit and the outer unit to judge whether the last closed inner unit is adopted, on the basis of the original main control panel, the effect of reducing noise can be achieved only by changing programs, the use comfort of the multi-connected air conditioner is improved, and therefore the market demand can be quickly responded.
In another embodiment of the present invention, it is also possible to know whether the last turned-off indoor unit is the last turned-off indoor unit through communication between the indoor units.
FIG. 9 is a schematic diagram of a computer device according to one embodiment of the invention. Wherein the computer device 1 comprises a memory 12, a processor 14 and a computer program stored on the memory 12 and executable on the processor 14, the processor 14 being adapted to perform the steps of the method according to any of the previous embodiments.
According to the computer device 1 of the present invention, the processor 14 included therein is configured to execute the steps of the method for controlling an internal machine in any of the above embodiments, so that the computer device 1 can achieve all the beneficial effects of the method for controlling an internal machine, and therefore, the description thereof is omitted here.
In an embodiment of a fifth aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, which when executed by a processor implements the steps of the method according to any one of the above embodiments.
According to the computer-readable storage medium of the present invention, when being executed by a processor, the computer program stored thereon implements the steps of the method for controlling an internal machine in any of the above embodiments, so that the computer-readable storage medium can implement all the beneficial effects of the method for controlling an internal machine, and details thereof are not repeated herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A control method of an indoor unit is used for a multi-connected air conditioner, the multi-connected air conditioner comprises at least one outdoor unit and a plurality of indoor units connected with the at least one outdoor unit, and the control method comprises the following steps:
when the plurality of internal machines are shut down, judging whether the current internal machine is the last shut-down internal machine;
when the judgment result is yes, when a stop signal sent by the external unit is received, controlling the electronic expansion valve of the current internal unit to be opened to a standby opening;
wherein, the step of judging whether the current internal machine is the last internal machine shut down specifically includes:
judging whether the current internal machine function needs to be zero or not, if so, starting timing to obtain a first timing variable, and judging whether a signal of stopping the external machine is received or not;
when the judgment result is yes, judging whether the first timing variable is smaller than a first preset time or not;
and when the first timing variable is smaller than the first preset time, judging that the current indoor unit is the last stopped indoor unit.
2. The control method according to claim 1, wherein when the determination result of determining whether the signal for stopping the outdoor unit is received is yes, the control method further comprises:
starting timing to obtain a second timing variable;
and when the judgment result of judging whether the first timing variable is smaller than the first preset time is greater than or equal to the first preset time, controlling the current internal machine to keep the current opening, and opening to the standby opening after the second timing variable reaches the second preset time.
3. The control method according to claim 2,
the value range of the first preset time is as follows: 15S to 30S;
the value range of the second preset time is as follows: 5min to 7 min.
4. The control method according to claim 2 or 3, characterized by further comprising:
judging whether the judgment result of whether the current internal machine function needs to be zero is zero, judging whether the opening degree of an electronic expansion valve of the current internal machine is zero, if not, assigning the opening degree to be zero, and assigning the first timing variable to be zero; and
and when the judgment result of judging whether the signal for stopping the external unit is received is yes, judging whether the energy requirement of the external unit is zero, if not, assigning the energy requirement of the external unit to be zero, and assigning the second timing variable to be zero.
5. A control device of an indoor unit is used for a multi-connected air conditioner, the multi-connected air conditioner comprises at least one outdoor unit and a plurality of indoor units connected with the at least one outdoor unit, and the control device comprises:
the judging unit is used for judging whether the current internal machine is the last internal machine to be stopped when the internal machines are stopped;
the control unit is used for controlling the electronic expansion valve of the internal machine which is stopped at last to be opened to a standby opening degree when the judgment result is yes and the stop signal sent by the external machine is received;
the determining unit is specifically configured to:
judging whether the current internal machine function needs to be zero or not, if so, starting timing to obtain a first timing variable, and judging whether a signal of stopping the external machine is received or not;
when the judgment result is yes, judging whether the first timing variable is smaller than a first preset time or not;
and when the first timing variable is smaller than the first preset time, judging that the current indoor unit is the last stopped indoor unit.
6. The control device according to claim 5, wherein when the determination result of determining whether the signal for stopping the external unit is received is yes, the control unit is further configured to: starting timing to obtain a second timing variable;
and when the judgment result of judging whether the first timing variable is smaller than the first preset time is greater than or equal to the first preset time, controlling the current internal machine to keep the current opening, and opening to the standby opening after the second timing variable reaches the second preset time.
7. The control device according to claim 6,
the value range of the first preset time is as follows: 15S to 30S;
the value range of the second preset time is as follows: 5min to 7 min.
8. The control device according to claim 6 or 7, characterized by further comprising:
the timing unit is used for judging whether the judgment result of the current internal machine function requirement is zero or not, judging whether the opening degree of an electronic expansion valve of the current internal machine is zero or not, if not, assigning the opening degree to be zero, and assigning the first timing variable to be zero; and
and the timing unit is also used for judging whether the energy requirement of the external unit is zero or not when the judgment result of judging whether the signal for stopping the external unit is received is yes, if not, assigning the energy requirement of the external unit to be zero, and assigning the second timing variable to be zero.
9. An internal machine, characterized by comprising: the control device of the internal machine according to any one of claims 5 to 8.
10. A multi-split air conditioner comprising at least one outer unit, and further comprising a plurality of inner units according to claim 9 or control devices of the inner units according to any one of claims 5 to 8 connected to the at least one outer unit.
11. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor is adapted to perform the steps of the method according to any of claims 1 to 4.
12. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 4.
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