CN115823693B - Multi-split control method and device and multi-split - Google Patents
Multi-split control method and device and multi-split Download PDFInfo
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Abstract
The invention provides a multi-split control method and device and a multi-split, and relates to the technical field of air conditioners. The multi-split control method comprises the following steps: acquiring an exhaust temperature value; acquiring a return air pressure value; if the exhaust temperature value is in a first preset temperature range and the return air pressure value is in the first preset pressure range, sequencing the internal machines according to the capacity and the superheat degree of the internal machines powered down in the multi-connected machine to obtain a reset sequence; and controlling the internal machine to sequentially execute the reset of the expansion valve after the power is supplied according to the reset sequence. The multi-split control device and the multi-split control method can be implemented by the multi-split control device. The multi-split control method and device provided by the invention can solve the technical problem that the high temperature damage of the compressor motor is caused by frequent reset of the expansion valve of the inner machine in the multi-split.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-split control method and device and a multi-split.
Background
At present, after the power of the inner machine valve in the multi-split air conditioner is lost, the opening of the inner machine valve is maintained before power loss. And electrifying again, resetting the valve of the inner machine to 0, and recovering the opening degree of the current outer machine. The main reason is that the valve steps of the internal machine valve can be distorted through multiple start-stop changes. Therefore, the internal machine valve executes the reset action by powering on through power failure, and the accuracy of the opening degree of the valve is maintained.
In the prior art, it has been found that under certain conditions, in the high-frequency operation process of the external machine, most of the internal machines are frequently powered off and powered on, and the internal machine valves are frequently reset, so that the valve opening is small, the low pressure is too low, the exhaust protection is realized, and the high temperature demagnetization of the press motor is damaged.
Disclosure of Invention
The invention solves the technical problem that the high temperature damage of a compressor motor is caused by frequent resetting of an expansion valve of an inner machine in a multi-split air conditioner.
In order to solve the above problems, the present invention provides a multi-split control method, including:
obtaining an exhaust temperature value, wherein the exhaust temperature value represents the exhaust temperature of a compressor in an external machine of the multi-split air conditioner;
acquiring a return air pressure value, wherein the return air pressure value represents the return air pressure of the compressor;
If the exhaust temperature value is in a first preset temperature range and the return air pressure value is in a first preset pressure range, sequencing the internal machines according to the capacity and the superheat degree of the internal machines powered down in the multi-connected machine to obtain a reset sequence;
and controlling the internal machine to sequentially execute the expansion valve reset after the internal machine is powered on according to the reset sequence.
Compared with the prior art, the multi-split control method provided by the invention has the beneficial effects that:
Under the condition that the multi-split air conditioner executes the multi-split air conditioner control method, the fact that all power-down internal machines execute reset can be judged according to the exhaust temperature value and the return air pressure value, and the situation that the low-pressure side pressure of a compressor is too low to form a blockage risk cannot occur. Under the condition that the low-pressure side pressure is too low and the risk of blockage is formed, the internal machines are subjected to expansion valve resetting sequencing according to the capacity and the superheat degree of the internal machines which are powered down, so that the internal machines which are powered down partially can suspend to execute the expansion valve resetting action after power is obtained, the low-pressure side of the compressor can be ensured to have enough pressure, the condition that the low-pressure side pressure is too low is prevented, and the risk of blockage is avoided; therefore, the technical problem that the high temperature damage of the compressor motor is caused by frequent resetting of the expansion valve of the internal machine in the prior art can be solved.
Optionally, the step of sequencing the internal machines according to the capacity and the superheat degree of the internal machines powered down in the multi-split air conditioner comprises the following steps:
Sequencing the internal machines according to the capacity of the internal machines;
and if the capacities of the plurality of internal machines are the same, sequencing the plurality of internal machines with the same capacities according to the degree of superheat.
The capacity of the internal machine determines the influence of the internal machine on the multi-split system by executing the reset of the expansion valve after the internal machine is powered on, so that the sequence of executing the reset of the expansion valve after the internal machine is powered on can be ordered according to the capacity, the overall stability of the multi-split system is ensured, and the overall fluctuation of the multi-split system is prevented from influencing the overall use comfort of a user.
In addition, according to the degree of superheat, whether the reset action of the expansion valve is executed after the internal machine is powered on or not can be judged, the overall operation stability of the multi-split system can be influenced, and the multi-split system is convenient to control overall.
Optionally, the step of ordering the internal machines according to the capacity of the internal machines includes:
sorting the internal machines in the order of capacity from small to small;
the step of sequencing the plurality of internal machines with the same capacity according to the degree of superheat comprises the following steps:
And sequencing the internal machines with the same capacity in the order of the large superheat degree to the small superheat degree.
The internal machine with small capacity preferentially executes the reset action of the expansion valve, has small influence on the operation of the multi-split system, and can prevent the integral fluctuation of the multi-split system from influencing the use comfort of a user. The internal machine with large superheat degree can execute the expansion valve reset preferentially, and can control the multi-split system conveniently.
Optionally, the first preset temperature range is defined by a first temperature threshold and a second temperature threshold, wherein the first temperature threshold is smaller than the second temperature threshold;
the first preset pressure range is defined by a first pressure threshold and a second pressure threshold, wherein the first pressure threshold is less than the second pressure threshold.
Optionally, if the exhaust temperature value is smaller than the first temperature threshold value and the return air pressure value is larger than the second pressure threshold value, the internal machine which is powered down is controlled to execute expansion valve reset according to the number of the internal machines which are powered down and the running frequency of the compressor.
Optionally, the step of controlling the powered down internal machines to perform expansion valve reset according to the number of the powered down internal machines and the operation frequency of the compressor includes:
And if the number of the internal machines which are powered down is smaller than the preset number and the running frequency of the compressor is smaller than the preset frequency, controlling all the internal machines which are powered down to execute the reset of the expansion valve immediately after the internal machines which are powered down are powered up.
Optionally, if the number of the powered-down internal machines is greater than or equal to the preset number, or the operation frequency of the compressor is greater than or equal to the preset frequency, the powered-down internal machines are operated at the opening before power failure after power is obtained.
Optionally, if the exhaust temperature value is greater than or equal to the second temperature threshold value and the return air pressure value is less than or equal to the second pressure threshold value, the internal machine after power failure is powered on is operated at an opening before power failure.
A multi-split control device comprising:
The first acquisition module is used for acquiring an exhaust temperature value, wherein the exhaust temperature value represents the exhaust temperature of a compressor in an external machine of the multi-split air conditioner;
The second acquisition module is used for acquiring a return air pressure value, and the return air pressure value represents the return air pressure of the compressor;
The sequencing module is used for sequencing the internal machines according to the capacity and the superheat degree of the internal machines powered down in the multi-connected machine to obtain a reset sequence when the exhaust temperature value is in a first preset temperature range and the return air pressure value is in the first preset pressure range;
and the control module is used for controlling the internal machine to sequentially execute the reset of the expansion valve after the internal machine is powered on according to the reset sequence.
A multi-split air conditioner comprises a controller, wherein the controller is used for executing the multi-split air conditioner control method.
The multi-split control device and the multi-split control method have the same beneficial effects as those of the multi-split control method in the prior art, and are not repeated.
Drawings
FIG. 1 is a flowchart of a multi-split control method provided in an embodiment of the present application;
FIG. 2 is a flowchart of step S30 in the multi-split control method according to the embodiment of the present application;
FIG. 3 is a flowchart illustrating another step of the multi-split control method according to an embodiment of the present application;
FIG. 4 is a flowchart illustrating another step of the multi-split control method according to an embodiment of the present application;
Fig. 5 is a schematic functional block diagram of a multi-split control device according to an embodiment of the present application.
Reference numerals illustrate:
10-a first acquisition module; 20-a second acquisition module; 30-a sorting module; 40-control module.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
The embodiment of the application provides a multi-split air conditioner, which comprises at least one outer machine and a plurality of inner machines, wherein the plurality of inner machines are respectively arranged in a plurality of appointed areas and are respectively used for respectively providing air conditioning effects for the plurality of appointed areas. The air conditioning effect includes, but is not limited to, temperature conditioning effect, humidity conditioning effect, fresh air effect and sterilization and dust removal effect.
The outer machine is connected with the plurality of inner machines, and under the condition that the outer machine operates, the compressor in the outer machine leads out compressed refrigerant to the plurality of inner machines, and under the condition that the refrigerant enters the plurality of inner machines, the plurality of inner machines operate and respectively provide air conditioning effect for a plurality of designated areas.
In the prior art, a part of internal machines are powered down, and after the internal machines are powered down and powered up again, in order to improve the accuracy of opening adjustment of the expansion valve in the internal machines, an action of resetting the expansion valve needs to be performed on the expansion valve, that is, the opening of the expansion valve is over-closed to 0, and then the opening of the expansion valve is adjusted to a specified opening. Note that "over-closing" may be exemplified by controlling the opening degree of the expansion valve to be closed for 580 steps in order to ensure that the opening degree of the expansion valve is closed for 0 steps in the case where the opening degree of the expansion valve is 480 steps. However, in the case of an excessive number of internal machines performing the resetting of the expansion valve, this may lead to an excessively low pressure on the low-pressure side of the compressor, with the risk of blocking, thus causing high-temperature demagnetization damage of the compressor motor.
In order to improve the technical problems, in other words, the technical problems that the high temperature of a compressor motor is damaged due to frequent resetting of an expansion valve of an inner machine in a multi-split air conditioner in the prior art are solved, the application also provides a multi-split air conditioner control method which can be applied to the multi-split air conditioner provided by the application.
In order to facilitate execution of the multi-split air conditioner control method, in the embodiment of the application, the multi-split air conditioner further comprises a temperature detection device and a pressure detection device, wherein the temperature detection device is arranged at an exhaust port of the compressor and is used for detecting the exhaust temperature of the compressor; alternatively, the temperature detection means may be a temperature sensor. The pressure detection device is arranged at the return air port of the compressor and is used for detecting the return air pressure of the compressor; alternatively, the pressure detection means may be a pressure sensor.
Further, in order to execute the multi-split control method, in the embodiment of the application, the multi-split further comprises a controller, and the controller is used for executing the multi-split control method. The controller may be an integrated circuit chip having signal processing capabilities. The controller may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a single-chip microcomputer, a micro-control unit (Microcontroller Unit, MCU), a complex Programmable logic device (Complex Programmable Logic Device, CPLD), a Field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA), an Application-specific integrated Circuit (ASIC), an embedded ARM, etc., and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application.
In a possible implementation manner, the multi-split air conditioner may further include a memory, where the memory is used to store program instructions that can be executed by the controller, for example, the multi-split air conditioner control device provided by the embodiment of the present application includes at least one of the multi-split air conditioner control devices that can be stored in the memory in a form of software or firmware. The Memory may be a stand-alone external Memory including, but not limited to, random access Memory (Random Access Memory, RAM), read Only Memory (ROM), programmable Read Only Memory (Programmable Read-Only Memory, PROM), erasable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM), electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM). The memory may also be provided integrally with the controller, e.g. the memory may be provided integrally with the controller in the same chip.
Based on the multi-split air conditioner provided above, referring to fig. 1, the multi-split air conditioner control method provided in the embodiment of the application includes:
s10, acquiring an exhaust temperature value.
The exhaust temperature value represents the exhaust temperature of the compressor in the outer machine of the multi-split air conditioner. That is, the discharge temperature value is obtained by detecting the temperature of the discharge port of the compressor by the temperature detecting means, and is sent to the controller by the temperature detecting means. The controller receives the exhaust temperature value sent by the temperature detection device.
S20, acquiring a return air pressure value.
Wherein the back pressure value represents the back pressure of the compressor. That is, the return air pressure value is acquired by detecting the pressure of the return air port of the compressor by the pressure detecting device, and is sent to the controller by the pressure detecting device. The controller receives the return air pressure value sent by the pressure detection device. It is noted that the return air pressure value also represents the pressure value at the low pressure side of the compressor.
S30, if the exhaust temperature value is in a first preset temperature range and the return air pressure value is in the first preset pressure range, sequencing the internal machines according to the capacity and the superheat degree of the internal machines powered down in the multi-connected machine to obtain a reset sequence.
S40, controlling the internal machine to sequentially execute expansion valve reset after power is supplied according to the reset sequence.
In the above-mentioned manner, under the condition that the multi-split air conditioner executes the multi-split air conditioner control method, it can be judged that the low-pressure side pressure of the compressor is too low to form a blockage risk when all the power-down internal machines are reset according to the exhaust temperature value and the return air pressure value. Under the condition that the low-pressure side pressure is too low and the risk of blockage is formed, the internal machines are subjected to expansion valve resetting sequencing according to the capacity and the superheat degree of the internal machines which are powered down, so that the internal machines which are powered down partially can suspend to execute the expansion valve resetting action after power is obtained, the low-pressure side of the compressor can be ensured to have enough pressure, the condition that the low-pressure side pressure is too low is prevented, and the risk of blockage is avoided; therefore, the technical problem that the high temperature damage of the compressor motor is caused by frequent resetting of the expansion valve of the internal machine in the prior art can be solved.
Optionally, referring to fig. 2, in step S30, the step of ordering the internal units according to the capacity and the superheat degree of the internal units powered down in the multi-split air conditioner includes:
s31, sorting the internal machines according to the capacity of the internal machines;
and S32, if the capacities of the plurality of internal machines are the same, sorting the plurality of internal machines with the same capacities according to the degree of superheat.
That is, the order in which the internal machines perform the expansion valve reset is preferably ordered in the magnitude of the capacities of the plurality of internal machines that are powered down. And under the condition of the same capacity, sequencing the order of resetting the expansion valve of the internal machines with the same capacity according to the degree of superheat.
The capacity of the internal machine determines the influence of the internal machine to the multi-split system by executing the reset of the expansion valve after the internal machine is powered on, so that the sequence of executing the reset of the expansion valve after the internal machine is powered on can be ordered according to the capacity, the overall stability of the multi-split system is ensured, and the overall fluctuation of the multi-split system is prevented from influencing the overall use comfort of a user.
In addition, according to the degree of superheat, whether the reset action of the expansion valve is executed after the internal machine is powered on or not can be judged, the overall operation stability of the multi-split system can be influenced, and the multi-split system is convenient to control overall.
It should be understood that in other embodiments of the present application, the step S30 may also be performed in other manners, for example, the step S is performed according to the degree of superheat, and then the step S is performed according to the degree of capacity. For example, the total value of the capacity and the degree of superheat of the internal unit according to a specific gravity is sorted by size.
The step of sorting the internal machines according to the capacity of the internal machines in step S31 includes:
The internal machines are ordered in order of arrival of capacity from small.
In addition, the step of sorting the plurality of internal machines having the same capacity according to the degree of superheat in step S32 includes:
The internal machines with the same capacity are ordered in the order of the great degree of superheat to the small degree of superheat.
The internal machine with small capacity preferably executes the reset action of the expansion valve, has small influence on the operation of the multi-split system, and can prevent the integral fluctuation of the multi-split system from influencing the use comfort of a user. The internal machine with large superheat degree can execute the expansion valve reset preferentially, and can control the multi-split system conveniently.
The heat exchanger in the inner machine with large capacity is large, and the integral influence on the multi-split system is large under the condition of executing the reset of the expansion valve; and the heat exchanger in the internal machine with small capacity is small, so that the integral influence on the multi-split system is small under the condition of executing the reset of the expansion valve. Based on the method, the plurality of powered-down internal machines are ordered according to the capacity, and the expansion valve reset can be sequentially executed on the plurality of powered-down internal machines under the condition that the influence on the multi-split system is not great, so that the overall stability of the multi-split system is ensured.
The internal machine with larger superheat degree has smaller influence on the multi-split system under the condition of executing the reset of the expansion valve, and the internal machine with larger superheat degree has smaller influence on the whole multi-split system due to the fact that the exhaust temperature and the return air pressure of the compressor are easy to control under the condition of executing the reset of the expansion valve, and based on the fact, the internal machine with larger superheat degree can execute the reset of the expansion valve preferentially.
Based on the multi-split control method provided above, the following is exemplified:
In a multi-split system, 20 internal units are provided. Wherein, the internal machine 20 is operated fully on, and the press frequency is 110Hz. In the process, 4 internal machines are suddenly powered off, and the opening degree of the valve is about 200 pls. After 10s, the power supply of the 4 internal machines is recovered after the power is turned off, at the moment, the exhaust temperature is 100 ℃, the low pressure is 4.3bar, the frequency is 110Hz, and the 4 internal machines execute the reset action in turn. The power-down 4 internal machines are marked with 1,2, 3 and 4 in sequence, and the capacities of the power-down 4 internal machines are 1P, 2P and 3P in sequence. The superheat degree after power-on is 5 ℃,3 ℃,1 ℃ and-1 ℃ in sequence, and the reset sequence of the internal machine is 1/2/3/4 according to the capacity and the superheat degree. The internal machine 1 performs reset first, the internal machines 2,3 and 4 maintain the opening before power failure, and after the internal machine 1 is reset, the internal machine 2 performs reset action, at this time, the internal machine 1 is controlled normally, and the internal machines 3 and 4 maintain the opening before power failure. And then the internal machine 3 executes the reset, and the internal machine 4 executes the reset until the reset of all the internal machines is completed.
In addition, in the embodiment of the present application, in step S30, the first preset temperature range is defined by a first temperature threshold and a second temperature threshold, wherein the first temperature threshold is smaller than the second temperature threshold. Alternatively, the value of the first temperature threshold may be 90 ℃ to 100 ℃, in other words, the value of the first temperature threshold may be 90 ℃, 91 ℃, 92 ℃, 93 ℃, 94 ℃, 95 ℃, 96 ℃, 97 ℃, 98 ℃, 99 ℃, or 100 ℃, etc., wherein the preferred value of the first temperature threshold is 90 ℃. The second temperature threshold may be set to 100℃to 110℃or, in other words, the second temperature threshold may be set to 100℃101℃102℃103℃104℃105℃106℃107℃108℃109℃110℃or the like. Preferably, the second temperature threshold has a value of 105 ℃.
In addition, the first preset pressure range is defined by a first pressure threshold and a second pressure threshold, wherein the first pressure threshold is less than the second pressure threshold. The value of the first pressure threshold may be 2bar to 4bar, in other words, the value of the first pressure threshold may be 2bar, 3bar or 4bar, preferably the value of the first pressure threshold is 2bar. In addition, the value of the second pressure threshold may be 4bar to 6bar, in other words, the value of the second pressure threshold may be 4bar, 5bar or 6bar; preferably, the value of the second pressure threshold is 5bar.
In addition, referring to fig. 3, in an embodiment of the present application, the multi-split control method further includes:
And S110, if the exhaust temperature value is smaller than the first temperature threshold value and the return air pressure value is larger than the second pressure threshold value, controlling the powered-down internal machines to execute expansion valve reset according to the number of the powered-down internal machines and the running frequency of the compressor.
In other words, when the exhaust temperature value is low and the return air pressure value is high, the influence of the reset of the expansion valve on the multi-split system is required to be determined according to the number of the powered-down internal machines and the running frequency of the compressor. Thereby judging whether the internal machine needs to execute the expansion valve reset to order.
Optionally in step S110, the step of controlling the powered down internal machines to perform the expansion valve reset according to the number of powered down internal machines and the operation frequency of the compressor includes:
And S111, if the number of the power-down internal machines is smaller than the preset number and the running frequency of the compressor is smaller than the preset frequency, controlling all the power-down internal machines to execute the expansion valve reset immediately after power is obtained.
It should be noted that, when the number of powered-down internal units is smaller, this means that even if all the internal units execute the action of resetting the expansion valve at the same time, the influence on the multi-split system is smaller. Therefore, in the case where the operation frequency of the compressor is not high, the expansion valve reset can be immediately performed in the case where the power of the powered-down internal machine is obtained.
Of course, after step S110, the multi-split control method further includes:
And S112, if the number of the power-down internal machines is greater than or equal to the preset number, or the running frequency of the compressor is greater than or equal to the preset frequency, the power-down internal machines are operated at the opening before power failure after power-up.
In other words, when the number of internal machines is greater than or equal to the preset number, or when the operating frequency of the compressor is greater than or equal to the preset frequency, it means that all the internal machines that are powered down perform the reset of the expansion valve after power is obtained, and thus the stability of the multi-split system may be greatly affected. Based on the control method, the control device operates at the opening degree before power failure after power failure of the internal machine is obtained.
It should be understood that, in other embodiments of the present application, when the number of internal machines that are powered down is greater than or equal to the preset number, or the operating frequency of the compressor is greater than or equal to the preset frequency, the order in which the internal machines execute the opening degrees of the expansion valves may be ordered, and of course, the ordering manner may be executed according to the steps in step S30.
In this embodiment, referring to fig. 4, the multi-split control method further includes:
And S210, if the exhaust temperature value is greater than or equal to the second temperature threshold value and the return air pressure value is less than or equal to the second pressure threshold value, the internal machine after power failure is obtained and then operates at the opening before power failure.
That is, when the exhaust temperature value is high and the return air pressure value of the compressor is low, that is, the low-pressure side pressure is low, the compressor is operated according to the opening before the power failure of the power-down internal machine after the power failure of the internal machine is obtained, in other words, the power failure of the internal machine is not allowed to execute the expansion valve reset immediately after the power failure, so as to ensure the overall stability of the multi-split air conditioner system.
In order to execute the possible steps of the multi-split control method provided in the foregoing embodiments, please refer to fig. 5, and fig. 5 shows a schematic functional block diagram of a multi-split control device provided in an embodiment of the present application. The multi-split control device is applied to the multi-split, and the multi-split control device provided by the embodiment of the application is used for executing the multi-split control method. It should be noted that, the basic principle and the technical effects of the multi-split control device provided in this embodiment are substantially the same as those of the foregoing embodiments, and for brevity, reference may be made to corresponding contents in the foregoing embodiments.
The multi-split control device comprises a first acquisition module 10, a second acquisition module 20, a sequencing module 30 and a control module 40.
The first obtaining module 10 is configured to obtain an exhaust temperature value, where the exhaust temperature value represents an exhaust temperature of a compressor in an external unit of the multi-split air conditioner.
Optionally, the first obtaining module 10 is configured to perform step S10 in the foregoing respective figures, so as to achieve a corresponding technical effect.
The second acquisition module 20 is configured to acquire a return air pressure value, where the return air pressure value represents a return air pressure of the compressor.
Optionally, the second obtaining module 20 is configured to perform step S20 in each of the foregoing figures, so as to achieve a corresponding technical effect.
The sequencing module 30 is configured to sequence the internal machines according to the capacity and the superheat degree of the internal machine powered down in the multi-connected machine to obtain a reset sequence when the exhaust temperature value is within a first preset temperature range and the return air pressure value is within the first preset pressure range.
Optionally, the sorting module 30 is configured to execute the step S30 and the sub-steps thereof in the foregoing respective diagrams, so as to achieve the corresponding technical effects.
The control module 40 is used for controlling the internal machine to sequentially execute the expansion valve reset after the internal machine is powered on according to the reset sequence.
Optionally, the control module 40 is configured to execute step S40 and the sub-steps thereof in the foregoing respective diagrams, so as to achieve the corresponding technical effects.
In addition, the control module 40 may also be configured to execute the above-mentioned step S110 and step S210 and the sub-steps thereof, so as to achieve the corresponding technical effects.
In summary, the multi-split control method, the device and the multi-split control system provided by the embodiment of the application can judge that the low-pressure side pressure of the compressor is too low to form a blockage risk when all the power-down internal machines are reset according to the exhaust temperature value and the return air pressure value. Under the condition that the low-pressure side pressure is too low and the risk of blockage is formed, the internal machines are subjected to expansion valve resetting sequencing according to the capacity and the superheat degree of the internal machines which are powered down, so that the internal machines which are powered down partially can suspend to execute the expansion valve resetting action after power is obtained, the low-pressure side of the compressor can be ensured to have enough pressure, the condition that the low-pressure side pressure is too low is prevented, and the risk of blockage is avoided; therefore, the technical problem that the high temperature damage of the compressor motor is caused by frequent resetting of the expansion valve of the internal machine in the prior art can be solved.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The apparatus embodiments described above are merely illustrative, for example, of the flowcharts and block diagrams in the figures that illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present invention may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (10)
1. The multi-split control method is characterized by comprising the following steps of:
obtaining an exhaust temperature value, wherein the exhaust temperature value represents the exhaust temperature of a compressor in an external machine of the multi-split air conditioner;
acquiring a return air pressure value, wherein the return air pressure value represents the return air pressure of the compressor;
If the exhaust temperature value is in a first preset temperature range and the return air pressure value is in a first preset pressure range, sequencing the internal machines according to the capacity and the superheat degree of the internal machines powered down in the multi-connected machine to obtain a reset sequence;
and controlling the internal machine to sequentially execute the expansion valve reset after the internal machine is powered on according to the reset sequence.
2. The multi-split control method according to claim 1, wherein the step of sequencing the internal machines according to the capacity and the superheat degree of the internal machines powered down in the multi-split comprises:
Sequencing the internal machines according to the capacity of the internal machines;
and if the capacities of the plurality of internal machines are the same, sequencing the plurality of internal machines with the same capacities according to the degree of superheat.
3. The multi-split control method according to claim 2, wherein the step of sorting the internal units according to the capacity of the internal units comprises:
sorting the internal machines in the order of capacity from small to small;
the step of sequencing the plurality of internal machines with the same capacity according to the degree of superheat comprises the following steps:
And sequencing the internal machines with the same capacity in the order of the large superheat degree to the small superheat degree.
4. The multi-split control method according to any one of claims 1 to 3, wherein the first preset temperature range is defined by a first temperature threshold and a second temperature threshold, wherein the first temperature threshold is smaller than the second temperature threshold;
the first preset pressure range is defined by a first pressure threshold and a second pressure threshold, wherein the first pressure threshold is less than the second pressure threshold.
5. The method according to claim 4, wherein if the exhaust temperature value is less than the first temperature threshold and the return air pressure value is greater than the second pressure threshold, the power-down internal machine is controlled to perform expansion valve reset according to the number of power-down internal machines and the operation frequency of the compressor.
6. The multi-split control method of claim 5, wherein the step of controlling the powered down internal machines to perform expansion valve reset according to the number of powered down internal machines and the operating frequency of the compressor comprises:
And if the number of the internal machines which are powered down is smaller than the preset number and the running frequency of the compressor is smaller than the preset frequency, controlling all the internal machines which are powered down to execute the reset of the expansion valve immediately after the internal machines which are powered down are powered up.
7. The multi-split control method according to claim 6, wherein if the number of the internal machines that are powered down is greater than or equal to the preset number, or the operating frequency of the compressor is greater than or equal to the preset frequency, the internal machines that are powered down are operated at an opening degree before power down after power up.
8. The multi-split control method according to claim 4, wherein if the exhaust temperature value is greater than or equal to the second temperature threshold value and the return air pressure value is less than or equal to the second pressure threshold value, the internal machine after power failure is turned on is operated at an opening before power failure.
9. A multi-split control device, comprising:
The first acquisition module is used for acquiring an exhaust temperature value, wherein the exhaust temperature value represents the exhaust temperature of a compressor in an external machine of the multi-split air conditioner;
The second acquisition module is used for acquiring a return air pressure value, and the return air pressure value represents the return air pressure of the compressor;
The sequencing module is used for sequencing the internal machines according to the capacity and the superheat degree of the internal machines powered down in the multi-connected machine to obtain a reset sequence when the exhaust temperature value is in a first preset temperature range and the return air pressure value is in the first preset pressure range;
and the control module is used for controlling the internal machine to sequentially execute the reset of the expansion valve after the internal machine is powered on according to the reset sequence.
10. A multi-split air conditioner, comprising a controller for executing the multi-split air conditioner control method according to any one of claims 1 to 8.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011117681A (en) * | 2009-12-04 | 2011-06-16 | Panasonic Corp | Refrigerating cycle device |
| CN105485868A (en) * | 2015-12-23 | 2016-04-13 | 宁波奥克斯电气股份有限公司 | Reset control method of indoor unit electronic expansion valve of multi-coupled air conditioner |
| CN110296518A (en) * | 2019-07-12 | 2019-10-01 | 宁波奥克斯电气股份有限公司 | The multi-joint interior machine control method for electronic expansion valve of one kind, device and air conditioner |
| CN113701305A (en) * | 2021-07-26 | 2021-11-26 | 宁波奥克斯电气股份有限公司 | Air conditioner shutdown differential pressure balance control method and device and air conditioner |
| CN113739336A (en) * | 2021-09-09 | 2021-12-03 | 宁波奥克斯电气股份有限公司 | Multi-split electronic expansion valve control method, air conditioner control device and air conditioner |
| CN113944979A (en) * | 2021-11-12 | 2022-01-18 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and device, multi-connected air conditioner and computer storage medium |
| CN114754461A (en) * | 2022-05-16 | 2022-07-15 | 美的集团武汉暖通设备有限公司 | Control method of air conditioner, controller, air conditioner and storage medium |
-
2022
- 2022-12-21 CN CN202211651116.2A patent/CN115823693B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011117681A (en) * | 2009-12-04 | 2011-06-16 | Panasonic Corp | Refrigerating cycle device |
| CN105485868A (en) * | 2015-12-23 | 2016-04-13 | 宁波奥克斯电气股份有限公司 | Reset control method of indoor unit electronic expansion valve of multi-coupled air conditioner |
| CN110296518A (en) * | 2019-07-12 | 2019-10-01 | 宁波奥克斯电气股份有限公司 | The multi-joint interior machine control method for electronic expansion valve of one kind, device and air conditioner |
| CN113701305A (en) * | 2021-07-26 | 2021-11-26 | 宁波奥克斯电气股份有限公司 | Air conditioner shutdown differential pressure balance control method and device and air conditioner |
| CN113739336A (en) * | 2021-09-09 | 2021-12-03 | 宁波奥克斯电气股份有限公司 | Multi-split electronic expansion valve control method, air conditioner control device and air conditioner |
| CN113944979A (en) * | 2021-11-12 | 2022-01-18 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and device, multi-connected air conditioner and computer storage medium |
| CN114754461A (en) * | 2022-05-16 | 2022-07-15 | 美的集团武汉暖通设备有限公司 | Control method of air conditioner, controller, air conditioner and storage medium |
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