CN115823693A - Multi-split air conditioner control method and device and multi-split air conditioner - Google Patents
Multi-split air conditioner control method and device and multi-split air conditioner Download PDFInfo
- Publication number
- CN115823693A CN115823693A CN202211651116.2A CN202211651116A CN115823693A CN 115823693 A CN115823693 A CN 115823693A CN 202211651116 A CN202211651116 A CN 202211651116A CN 115823693 A CN115823693 A CN 115823693A
- Authority
- CN
- China
- Prior art keywords
- internal
- internal machines
- control method
- air conditioner
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000012163 sequencing technique Methods 0.000 claims abstract description 24
- 238000004378 air conditioning Methods 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 description 12
- 230000009471 action Effects 0.000 description 10
- 230000006870 function Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 230000005347 demagnetization Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a multi-split air conditioner control method and device and a multi-split air conditioner, and relates to the technical field of air conditioners. The multi-connected machine control method comprises the following steps: acquiring an exhaust temperature value; acquiring a return air pressure value; if the exhaust temperature value is within a first preset temperature range and the return air pressure value is within a first preset pressure range, sequencing the internal machines according to the capacity and the superheat degree of the internal machines with power failure in the multi-split air-conditioning system to obtain a reset sequence; and controlling the internal machine to sequentially execute the resetting of the expansion valve after the power is supplied according to the resetting sequence. The multi-online control device and the multi-online control method provided by the invention can be executed. The multi-split air conditioner control method, the multi-split air conditioner control device and the multi-split air conditioner can solve the technical problem that the expansion valve of the inner machine in the multi-split air conditioner is frequently reset to cause high-temperature damage to the motor of the compressor.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-split air conditioner control method and device and a multi-split air conditioner.
Background
At present, after the power failure of an internal valve in a multi-split air conditioner, the internal valve is kept at an opening degree before the power failure. And electrifying again, resetting the internal machine valve to 0 and then restoring the opening degree given to the internal machine by the external machine. The main reason is that the number of valve steps may be distorted by the change of the internal valve through a plurality of times of start and stop. Therefore, the internal valve executes the reset action by power-off and power-on, and the accuracy of the valve opening is maintained.
In the prior art, it is found that under certain conditions, most of the internal machines are frequently powered off and powered on and the internal machine valves are frequently reset in the high-frequency running process of the external machine, so that the valve opening degree is small, the low voltage is too low, the exhaust protection is realized, and the motor of the press is damaged by high-temperature demagnetization.
Disclosure of Invention
The invention solves the technical problem that the expansion valve of the inner machine in the multi-split air conditioner is frequently reset to cause the high-temperature damage of the motor of the compressor.
In order to solve the above problems, the present invention provides a multi-split control method, including:
acquiring an exhaust temperature value, wherein the exhaust temperature value represents the exhaust temperature of a compressor in an outdoor unit 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 within a first preset temperature range and the return air pressure value is within a first preset pressure range, sequencing the internal machines according to the capacity and the superheat degree of the internal machines with power failure in the multi-split air-conditioning system to obtain a reset sequence;
and controlling the internal machine to sequentially execute the resetting of the expansion valve after the power is supplied according to the resetting 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 situation that the low-pressure side pressure of the compressor is too low and the blocking risk is formed can be avoided when the power-down internal machine is judged to be completely reset according to the exhaust temperature value and the return air pressure value. When the low-pressure side pressure is too low and the risk of blockage is formed, resetting of the internal machine execution expansion valves is sequenced according to the capacity and superheat degree of the power-down internal machines, so that the expansion valve resetting action can be temporarily delayed after the power of part of the power-down internal machines is powered on, the low-pressure side of the compressor can be ensured to have sufficient pressure, the situation that the low-pressure side pressure is too low is prevented, and the risk of blockage is avoided; therefore, the technical problem that the compressor motor is damaged at high temperature due to frequent resetting of the expansion valve of the inner machine in the prior art can be solved.
Optionally, the step of sequencing the internal units according to the capacity and the superheat degree of the internal units with power failure in the multi-split air conditioner comprises:
sequencing the internal machines according to the capacity of the internal machines;
and if the capacities of the internal machines are the same, sequencing the internal machines with the same capacity according to the superheat degree.
The capacity of the internal machine determines the influence of the internal machine on the multi-online system by resetting the expansion valve after the internal machine is powered on, so that the sequence of resetting the expansion valve after the internal machine is powered on can be sequenced according to the capacity, the overall stability of the multi-online system is ensured, and the overall use comfort of a user is prevented from being influenced by the overall fluctuation of the multi-online system.
In addition, the reset action of the expansion valve can be judged after the inner unit is electrified according to the superheat degree, whether the influence on the overall operation stability of the multi-split system can be caused or not can be judged, and the overall control on the multi-split system is facilitated.
Optionally, the step of sorting the internal units according to the capacity of the internal units includes:
sequencing the internal machines in the order of the arrival of the capacities;
the step of sequencing the plurality of internal machines with the same capacity according to the superheat degree comprises the following steps:
sequencing the inner machines with the same capacity in a book sequence from the large superheat degree to the small superheat degree.
The inner machine with small capacity preferentially executes the reset action of the expansion valve, has small influence on the operation of the multi-online system, and can prevent the integral fluctuation of the multi-online system from influencing the use comfort of users. The indoor unit with high superheat degree preferentially executes the resetting of the expansion valve, so that the multi-split system can be conveniently controlled.
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 greater than the second pressure threshold value, the powered-down internal machines are controlled to execute expansion valve reset according to the number of the powered-down internal machines and the operating 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 operating frequency of the compressor includes:
and if the number of the internal machines with power failure is less than the preset number and the running frequency of the compressor is less than the preset frequency, controlling all the internal machines with power failure to immediately execute the reset of the expansion valve after the internal machines with power failure are powered on.
Optionally, if the number of the power-down internal machines 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 power-down internal machines operate at an opening degree before power-down after being powered on.
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 unit that has power failure operates at an opening degree before power failure after power is obtained.
A multiple online control device comprising:
the system comprises a first obtaining module, a second obtaining module and a control module, wherein the first obtaining module is used for obtaining an exhaust temperature value, and the exhaust temperature value represents the exhaust temperature of a compressor in an outdoor unit 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 in the multi-connected air conditioner according to the capacity and the superheat degree of the internal machines with power failure in the multi-connected air conditioner to obtain a reset sequence under the condition that the exhaust temperature value is within a first preset temperature range and the return air pressure value is within a first preset pressure range;
and the control module is used for controlling the internal machine to sequentially execute the resetting of the expansion valve after the internal machine is electrified according to the resetting sequence.
A multi-split air conditioner comprises a controller, wherein the controller is used for executing the multi-split air conditioner control method.
The beneficial effects of the multi-connected machine control device and the multi-connected machine relative to the prior art are the same as the beneficial effects of the multi-connected machine control method relative to the prior art, and are not repeated again.
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 provided in the embodiment of the present application;
FIG. 3 is a flow chart of another step of a multi-split control method provided in an embodiment of the present application;
fig. 4 is a flowchart of another step of a multi-split control method provided in an embodiment of the present application;
fig. 5 is a functional block schematic diagram of a multi-connected controller provided in an embodiment of the present application.
Description of reference numerals:
10-a first acquisition module; 20-a second acquisition module; 30-a sorting module; 40-a control module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The embodiment of the application provides a multi-split air conditioner, and the multi-split air conditioner comprises at least one outer unit and a plurality of inner units, wherein the inner units are respectively arranged in a plurality of designated areas to respectively provide air conditioning for the designated areas. Wherein, the air conditioning function includes but is not limited to temperature regulation function, humidity regulation function, fresh air function and sterilization and dust removal function.
The outdoor unit is connected with the indoor units, the compressor in the outdoor unit guides out compressed refrigerant to the indoor units under the condition that the outdoor unit operates, and the indoor units operate and respectively provide air conditioning effect for the designated areas under the condition that the refrigerant enters the indoor units.
In the prior art, a power failure of some of the internal machines occurs, and after the internal machines are powered again after the power failure, in order to improve the accuracy of adjusting the opening degree of the expansion valve in the internal machines, an operation of resetting the expansion valve needs to be performed on the expansion valve, that is, the opening degree of the expansion valve is turned off to 0, and then the opening degree of the expansion valve is adjusted to a specified opening degree. In the case where the opening degree of the expansion valve is 480 steps, the "over-closing" may be performed by controlling the opening degree of the expansion valve to close 580 steps so as to ensure that the opening degree of the expansion valve closes to 0 step, for example. However, if the number of the internal machines performing the resetting of the expansion valve is too large, the pressure on the low-pressure side of the compressor is too low, and a blocking risk occurs, so that the high-temperature demagnetization damage of the motor of the compressor is caused.
In order to solve the technical problem, in other words, in order to solve the technical problem that in the prior art, the compressor motor is damaged due to frequent resetting of the expansion valve of the internal unit in the multi-split air conditioner, the present application further provides a multi-split air conditioner control method, and the multi-split air conditioner control method can be applied to the multi-split air conditioner provided by the present application.
In order to facilitate the implementation of the multi-split control method, in an embodiment of the present application, the multi-split control system further includes a temperature detection device and a pressure detection device, where the temperature detection device is installed at an exhaust port of the compressor and is used to detect an exhaust temperature of the compressor; alternatively, the temperature detection means may be a temperature sensor. The pressure detection device is arranged at the air return port of the compressor and used for detecting the air return pressure of the compressor; alternatively, the pressure detection means may be a pressure sensor.
Further, in order to perform the above-described multi-split control method, in an embodiment of the present application, the multi-split control further includes a controller configured to perform the multi-split control method. The controller may be an integrated circuit chip having signal processing capability. The controller may be a general purpose processor, and may include a Central Processing Unit (CPU), a single chip Microcomputer (MCU), a Micro Controller Unit (MCU), a Complex Programmable Logic Device (CPLD), a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an embedded ARM, and other chips, and may implement or execute the methods, steps, and Logic blocks disclosed in the embodiments of the present invention.
In one possible implementation, the multi-split air conditioner may further include a memory for storing program instructions executable by the controller, for example, the multi-split air conditioner provided by the embodiment of the present application includes at least one of the multi-split air conditioner provided by the embodiment of the present application, which may be stored in the memory in the form of software or firmware. The Memory may be a stand-alone external Memory including, but not limited to, random Access Memory (RAM), read Only Memory (ROM), programmable Read-Only Memory (PROM), erasable Read-Only Memory (EPROM), electrically Erasable Read-Only Memory (EEPROM). The memory may also be integrated with the controller, for example, the memory may be integrated with the controller on the same chip.
Based on the multi-split air conditioner provided above, referring to fig. 1, an embodiment of the present application provides a multi-split air conditioner control method including:
s10, acquiring an exhaust temperature value.
The exhaust temperature value represents the exhaust temperature of the compressor in the outdoor unit 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 detection means, and is sent to the controller by the temperature detection means. The controller receives the exhaust temperature value sent by the temperature detection device.
And S20, acquiring a return air pressure value.
Wherein the return air pressure value represents the return air pressure of the compressor. That is, the return air pressure value is obtained by detecting the pressure of the return air port of the compressor by the pressure detection device, and is sent to the controller by the pressure detection device. The controller receives the return air pressure value sent by the pressure detection device. It is worth noting that this return air pressure value also represents the pressure value on the low pressure side of the compressor.
And S30, if the exhaust temperature value is within a first preset temperature range and the return air pressure value is within a first preset pressure range, sequencing the internal machines according to the capacity and the superheat degree of the internal machines with power failure in the multi-split air-conditioning system to obtain a reset sequence.
And S40, controlling the internal machine to sequentially reset the expansion valve after the internal machine is powered on according to the reset sequence.
In the above, under the condition that the multi-split air conditioner executes the multi-split air conditioner control method, the situation that the low-pressure side pressure of the compressor is too low and the blocking risk is formed can be avoided when the power-down internal machine is completely reset according to the exhaust temperature value and the return air pressure value. When the low-pressure side pressure is too low and the risk of blockage is formed, resetting of the internal machine execution expansion valves is sequenced according to the capacity and superheat degree of the power-down internal machines, so that the expansion valve resetting action can be temporarily delayed after the power of part of the power-down internal machines is powered on, the low-pressure side of the compressor can be ensured to have sufficient pressure, the situation that the low-pressure side pressure is too low is prevented, and the risk of blockage is avoided; therefore, the technical problem that the compressor motor is damaged at high temperature due to frequent resetting of the expansion valve of the inner machine in the prior art can be solved.
Optionally, referring to fig. 2, in the step S30, the step of sorting the internal units according to the capacity and the superheat degree of the internal unit with power down in the multi-split air conditioner includes:
s31, sequencing 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, sequencing the plurality of internal machines with the same capacity according to the superheat degree.
That is, the order in which the internal machines perform the expansion valve reset is preferentially sorted by the sizes 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 executing expansion valve resetting of the internal machines with the same capacity according to the superheat degree.
The capacity of the internal machine determines the influence of the internal machine on the multi-online system by resetting the expansion valve after the internal machine is powered on, so that the sequence of resetting the expansion valve after the internal machine is powered on can be sequenced according to the capacity, the overall stability of the multi-online system is ensured, and the overall use comfort of a user is prevented from being influenced by the overall fluctuation of the multi-online system.
In addition, the expansion valve resetting action can be judged to be executed after the internal unit is electrified according to the superheat degree, whether the influence on the overall operation stability of the multi-split system can be caused or not can be judged, and the overall control on the multi-split system is facilitated.
It should be understood that in other embodiments of the present application, the step S30 may be sorted in other manners, for example, sorted according to the degree of superheat and then sorted according to the capacity. For example, the total value of the capacity and the degree of superheat of the indoor unit is sorted by size according to a specific gravity.
The step S31 of sorting the internal units according to the capacity of the internal units includes:
and sorting the internal machines in the order of the self-volume arrival.
In addition, the step of sorting the plurality of internal machines having the same capacity in accordance with the magnitude of the degree of superheat in step S32 includes:
the inner machines with the same capacity are sequenced in a book sequence from large superheat degree to small superheat degree.
It should be noted that the small-capacity internal machine preferentially executes the expansion valve resetting action, so that the influence on the operation of the multi-split system is small, and the influence on the use comfort of a user caused by the integral fluctuation of the multi-split system can be prevented. The indoor unit with high superheat degree preferentially executes the resetting of the expansion valve, so that the multi-split system can be conveniently controlled.
The heat exchanger in the large-capacity internal machine is large, and the overall influence on the multi-split system is large under the condition of executing the resetting of the expansion valve; and the heat exchanger in the indoor unit with small capacity is small, so that the whole influence on the multi-split system is small under the condition of executing the resetting of the expansion valve. Based on this, the plurality of power-down internal machines are sequenced according to the capacity, the expansion valve resetting can be sequentially executed on the plurality of power-up internal machines under the condition that the influence on the multi-split system is not large, and the stability of the whole multi-split system is ensured.
The influence of the inner machine with the larger superheat degree on the multi-split air conditioning system is smaller under the condition of executing the reset of the expansion valve, and the inner machine with the larger superheat degree is easy to control the exhaust temperature and the return air pressure of the compressor under the condition of executing the reset of the expansion valve, so that the influence on the whole multi-split air conditioning system is smaller.
Based on the multi-connected control method provided above, the following examples are given:
in a multiple on-line system, there are 20 machines. Wherein, the inner machine 20 is operated fully, and the frequency of the press is 110Hz. In the process, 4 internal machines suddenly power down, and the valve opening is about 200 pls. After 10s, the power failure of 4 internal machines recovers power supply, the exhaust temperature is 100 ℃, the low voltage is 4.3bar, the frequency is 110Hz, and the 4 internal machines execute the reset action in turn. The 4 powered-down internal machines are sequentially marked with 1, 2, 3 and 4, and the capacities of the internal machines are sequentially 1P, 2P and 3P. After electrification, the superheat degree is 5 ℃, 3 ℃, 1 ℃ and minus 1 ℃ in sequence, and the indoor unit is reset in sequence of 1/2/3/4 according to the capacity and the superheat degree. The inner machine 1 firstly executes resetting, the inner machines 2, 3 and 4 maintain the opening degree before power failure, after the inner machine 1 is reset, the inner machine 2 executes resetting action, at the moment, the inner machine 1 is normally controlled, and the inner machines 3 and 4 maintain the opening degree before power failure. And subsequently, the internal machine 3 is reset, and the internal machine 4 is reset until all the internal machines are reset.
In addition, in the embodiment of the present application, in step S30, a 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. Optionally, the first temperature threshold may be 90 ℃ to 100 ℃, in other words, the first temperature threshold may be 90 ℃, 91 ℃, 92 ℃, 93 ℃, 94 ℃, 95 ℃, 96 ℃, 97 ℃, 98 ℃, 99 ℃ or 100 ℃ and the like, wherein the preferred first temperature threshold is 90 ℃. The second temperature threshold may be 100 ℃ to 110 ℃, in other words, the second temperature threshold may be 100 ℃, 101 ℃, 102 ℃, 103 ℃, 104 ℃, 105 ℃, 106 ℃, 107 ℃, 108 ℃, 109 ℃ or 110 ℃, and the like. Preferably, the second temperature threshold is 105 ℃.
In addition, a 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, and 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 a first temperature threshold value and the return air pressure value is larger than a second pressure threshold value, controlling the power-down internal machines to execute expansion valve resetting according to the number of the power-down internal machines and the running frequency of the compressor.
In other words, under the conditions that the exhaust temperature value is low and the return air pressure value is high, the influence of the power-down internal machines on the multi-split system caused by the resetting of the expansion valve executed by the power-down internal machines needs to be judged according to the number of the power-down internal machines and the operation frequency of the compressor. Therefore, whether the reset of the internal machine execution expansion valves needs to be sequenced or not is judged.
Optionally, in step S110, the step of controlling the powered-down internal machines to perform the expansion valve reset according to the number of the 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 immediately execute expansion valve resetting after power is on.
It should be noted that, when the number of powered-down internal machines is small, the influence on the multi-split system is small even if all the internal machines simultaneously perform the operation of resetting the expansion valve. Therefore, under the condition that the running frequency of the compressor is not high, the expansion valve can be immediately reset under the condition that the power of the internal machine is off.
Of course, after step S110, the multi-split control method further includes:
and S112, if the number of the power-down internal machines is larger than or equal to the preset number, or the running frequency of the compressor is larger than or equal to the preset frequency, running at the opening degree before the power-down internal machines are powered on.
In other words, when the number of the internal machines 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, it indicates that all the internal machines with power failure perform expansion valve resetting after being powered on, and thus, a large influence may be caused on the stability of the multi-split system. Based on this, the device operates at the opening degree before the power failure after the power on of the power-off device.
It should be understood that, in other embodiments of the present application, when the number of powered-down internal machines 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 of executing the opening degree of the expansion valve on the internal machines may be sorted, and of course, the sorting may be executed according to the step 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 a second temperature threshold value and the return air pressure value is less than or equal to a second pressure threshold value, operating at an opening degree before power failure after the power failure of the internal machine is powered on.
That is to say, under the condition that 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 internal unit which is powered down runs according to the opening degree of the internal unit which is powered down before the power down is powered down after the power down is powered up, in other words, the internal unit which is powered down is not allowed to immediately execute the reset of the expansion valve after the power down is powered up, so that the overall stability of the multi-split system is ensured.
Referring to fig. 5, fig. 5 shows a functional block diagram of an on-line control device provided in an embodiment of the present application, in order to perform possible steps of the on-line control method provided in each of the above embodiments. The multi-split control device is applied to the multi-split air conditioner, and the multi-split control device provided in 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-connected machine control device provided by the present embodiment are substantially the same as those of the above embodiments, and for the sake of brief description, no part of the present embodiment is mentioned, and corresponding contents in the above embodiments may be referred to.
The multi-online 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 outdoor unit of the multi-split air-conditioning system.
Optionally, the first obtaining module 10 is configured to execute step S10 in each of the above-mentioned figures, so as to achieve a corresponding technical effect.
The second obtaining module 20 is configured to obtain 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 execute step S20 in each of the above-mentioned figures to achieve a corresponding technical effect.
The sorting module 30 is configured to, 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, sort the internal machines according to the capacity and the superheat degree of the internal machines with power failure in the multi-split air-conditioning system, and obtain a reset sequence.
Optionally, the sorting module 30 is configured to execute the step S30 and the sub-steps thereof in the above-mentioned respective figures to achieve the corresponding technical effect.
The control module 40 is used for controlling the internal machine to sequentially execute the resetting of the expansion valve after the power is supplied according to the resetting sequence.
Optionally, the control module 40 is configured to execute step S40 and its sub-steps in the above-mentioned figures to achieve the corresponding technical effects.
In addition, the control module 40 may also be configured to execute the above steps S110 and S210 and their sub-steps to achieve the corresponding technical effects.
In summary, the multi-split control method, the multi-split control device and the multi-split control system provided in the embodiment of the present application can determine that the low-pressure side pressure of the compressor is too low to form a blocking risk when all the internal machines powered down perform resetting according to the exhaust temperature value and the return air pressure value. When the low-pressure side pressure is too low and the risk of blockage is formed, resetting of the internal machine execution expansion valves is sequenced according to the capacity and superheat degree of the power-down internal machines, so that the expansion valve resetting action can be temporarily delayed after the power of part of the power-down internal machines is powered on, the low-pressure side of the compressor can be ensured to have sufficient pressure, the situation that the low-pressure side pressure is too low is prevented, and the risk of blockage is avoided; therefore, the technical problem that the compressor motor is damaged at high temperature due to frequent resetting of the expansion valve of the inner machine in the prior art can be solved.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. 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, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the foregoing storage the medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and 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 effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Claims (10)
1. A multi-split control method is characterized by comprising the following steps:
acquiring an exhaust temperature value, wherein the exhaust temperature value represents the exhaust temperature of a compressor in an outdoor unit 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 within a first preset temperature range and the return air pressure value is within a first preset pressure range, sequencing the internal machines according to the capacity and the superheat degree of the internal machines with power failure in the multi-connected air conditioner to obtain a reset sequence;
and controlling the internal machine to sequentially execute the resetting of the expansion valve after the power is supplied according to the resetting sequence.
2. The multiple online control method according to claim 1, wherein the step of sequencing the powered down indoor units according to the capacities and superheat degrees of the indoor units in the multiple online control system comprises:
sequencing the internal machines according to the capacity of the internal machines;
and if the capacities of the internal machines are the same, sequencing the internal machines with the same capacity according to the superheat degree.
3. The multi-online control method according to claim 2, wherein the step of sorting the internal machines according to the capacity of the internal machines comprises:
sequencing the internal machines in the order of the arrival of the capacities;
the step of sequencing the plurality of internal machines with the same capacity according to the superheat degree comprises the following steps:
sequencing the inner machines with the same capacity in a book sequence from the large superheat degree to the small superheat degree.
4. A multi-online control method according to any one of claims 1-3, 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 multi-online-control method according to claim 4, wherein if the exhaust temperature value is smaller than the first temperature threshold value and the return air pressure value is greater than the second pressure threshold value, the powered-down indoor units are controlled to perform expansion valve resetting according to the number of the powered-down indoor units and the operating frequency of the compressor.
6. The multiple online control method according to claim 5, wherein the step of controlling the powered-down indoor units to perform expansion valve resetting according to the number of the powered-down indoor units and the operating frequency of the compressor comprises:
and if the number of the internal machines with power failure is less than the preset number and the running frequency of the compressor is less than the preset frequency, controlling all the internal machines with power failure to immediately execute the reset of the expansion valve after the internal machines with power failure are powered on.
7. The multi-online control method according to claim 6, wherein if the number of the powered-down internal machines 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 powered-down internal machines are operated at an opening degree before the power failure.
8. The multi-online 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 multi-online control method is operated at an opening degree before power failure after the power failure of the internal machine is turned on.
9. A multiple on-line control device, comprising:
the system comprises a first obtaining module, a second obtaining module and a control module, wherein the first obtaining module is used for obtaining an exhaust temperature value, and the exhaust temperature value represents the exhaust temperature of a compressor in an outdoor unit 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 with power failure in the multi-split air conditioner to obtain a reset sequence under the condition that the exhaust temperature value is within a first preset temperature range and the return air pressure value is within a first preset pressure range;
and the control module is used for controlling the internal machine to sequentially execute the resetting of the expansion valve after the power is supplied according to the resetting sequence.
10. A multi-split air conditioner characterized by comprising a controller for executing the multi-split air conditioner control method according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211651116.2A CN115823693B (en) | 2022-12-21 | 2022-12-21 | Multi-split control method and device and multi-split |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211651116.2A CN115823693B (en) | 2022-12-21 | 2022-12-21 | Multi-split control method and device and multi-split |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115823693A true CN115823693A (en) | 2023-03-21 |
| CN115823693B CN115823693B (en) | 2024-06-11 |
Family
ID=85517485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211651116.2A Active CN115823693B (en) | 2022-12-21 | 2022-12-21 | Multi-split control method and device and multi-split |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115823693B (en) |
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115823693B (en) | 2024-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108763721B (en) | Simulation method for air conditioning system charging amount | |
| CN107869826B (en) | Air conditioner and its control method and device | |
| US20200232669A1 (en) | Control method and control device of air conditioner and air conditioner | |
| CN107655173B (en) | Operation control method, operation control device, air conditioning system and computer readable storage medium | |
| CN109813020A (en) | Electric expansion valve choke detecting method, heat pump system control method, electric control method, electric appliance and computer readable storage medium | |
| CN104676845A (en) | Multi-split system and control method thereof | |
| CN109945563B (en) | Multi-split air conditioning system and method and device for initializing electronic expansion valve thereof | |
| CN113959190A (en) | Method and device for controlling heat pump dryer, electronic equipment and storage medium | |
| CN111089393A (en) | Intelligent defrosting method and device for air cooler and controller | |
| CN113945086B (en) | Method and device for controlling heat pump dryer, electronic equipment and storage medium | |
| CN109883011B (en) | Refrigerant adjusting method and device and air conditioning system | |
| CN108870682A (en) | A kind of air conditioner load control method and device | |
| CN115823693A (en) | Multi-split air conditioner control method and device and multi-split air conditioner | |
| CN111076350B (en) | Control method and device for starting compressor and air conditioner | |
| CN114754463B (en) | Refrigerant leakage control method and device and multi-split air conditioner | |
| CN113375287B (en) | Low-voltage sensor fault identification control method and device and multi-split air conditioning system | |
| CN114459119B (en) | Air conditioner blockage detection method, device, equipment and storage medium | |
| CN113091236B (en) | Air conditioner liquid impact protection method and device and air conditioner | |
| CN113280485A (en) | Air conditioner sterilization control method and device and air conditioner | |
| JP2934659B2 (en) | Air conditioner dehumidifying operation control method and air conditioner | |
| CN111351182A (en) | Refrigerant adjusting method and device and air conditioning system | |
| CN115111723B (en) | Control method and control device of air conditioner and air conditioner | |
| CN115638509B (en) | Air conditioner control method and device, air conditioner and storage medium | |
| CN118089107A (en) | Multi-connected air conditioning system, control method and device thereof | |
| CN117073138A (en) | Defrosting control method, terminal and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |