CN116928808A - Three-pipe type heat recovery multi-split air conditioning unit and control method thereof - Google Patents
Three-pipe type heat recovery multi-split air conditioning unit and control method thereof Download PDFInfo
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- CN116928808A CN116928808A CN202210380997.2A CN202210380997A CN116928808A CN 116928808 A CN116928808 A CN 116928808A CN 202210380997 A CN202210380997 A CN 202210380997A CN 116928808 A CN116928808 A CN 116928808A
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- 238000000034 method Methods 0.000 title claims abstract description 81
- 238000011084 recovery Methods 0.000 title claims abstract description 38
- 238000004378 air conditioning Methods 0.000 title claims abstract description 34
- 230000008569 process Effects 0.000 claims abstract description 41
- 230000008859 change Effects 0.000 claims description 15
- 230000005284 excitation Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 claims description 4
- 239000003507 refrigerant Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 7
- 230000009467 reduction Effects 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/64—Airborne particle content
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2130/00—Control inputs relating to environmental factors not covered by group F24F2110/00
- F24F2130/40—Noise
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application belongs to the technical field of air conditioners, and particularly provides a three-pipe type heat recovery multi-split air conditioner unit and a control method thereof. The method aims to solve the problem that the noise generated in the opening process of an electronic expansion valve of an indoor unit of the existing three-pipe type heat recovery multi-split air conditioning unit is overlarge. Therefore, the three-pipe type heat recovery multi-split air conditioner unit comprises a plurality of indoor units which are arranged in parallel and a valve box connected with the indoor units, wherein an electronic expansion valve is arranged in the valve box, and the control method comprises the following steps: in the process that the electronic expansion valve is opened to a target opening degree from a closed state, the electronic expansion valve is controlled to be opened to a preset opening degree in an intermittent opening degree increasing mode; when the opening of the electronic expansion valve reaches the preset opening, the electronic expansion valve is controlled to be opened in a mode of continuously increasing the opening, so that the opening process of the electronic expansion valve is divided into a plurality of stages, the impact of a refrigerant on the electronic expansion valve in the opening process of the electronic expansion valve is effectively slowed down, and the noise reduction effect is achieved.
Description
Technical Field
The application belongs to the technical field of air conditioners, and particularly provides a three-pipe type heat recovery multi-split air conditioner unit and a control method thereof.
Background
Along with the continuous development of air conditioning technology, various types of air conditioning units are continuously designed to adapt to different application scenes; the valve box is used as an important control bridge of the three-pipe type heat recovery multi-split air conditioning unit, so that the unit can realize different heat exchange modes of refrigerating and heating of the plurality of indoor units simultaneously through the action of the valve box to meet different heat exchange demands of users. When the indoor unit performs switching between the cooling mode and the heating mode, the electronic expansion valve in the control valve box is required to be switched between on and off, so that the switching between the demand mode of the indoor unit is realized. However, the electronic expansion valve in the valve box is impacted by the refrigerant in the process of turning from a closed state to an open state, and the caliber of a valve port is usually larger (usually between phi 10mm and phi 15 mm), so that the noise generated by the electronic expansion valve is larger. Generally, an electronic expansion valve in the existing valve box directly adopts a mode of adjusting the opening at a constant speed to perform opening and closing actions, and noise generated when the mode is switched is large through the process, so that poor user experience is caused.
Accordingly, there is a need in the art for a new three-tube heat recovery multi-split air conditioning unit and control method thereof to solve the above-mentioned problems.
Disclosure of Invention
The application aims to solve the technical problems, namely the problem that the electronic expansion valve of the indoor unit of the existing three-pipe heat recovery multi-split air conditioning unit and the control method thereof generate overlarge noise in the opening process.
In a first aspect, the application provides a control method for a three-pipe heat recovery multi-split air conditioning unit, the three-pipe heat recovery multi-split air conditioning unit comprises a plurality of indoor units arranged in parallel and valve boxes connected with the indoor units, an electronic expansion valve is arranged in the valve boxes,
the control method comprises the following steps:
in the process that the electronic expansion valve is opened to a target opening degree from a closed state, the electronic expansion valve is controlled to be opened to a preset opening degree in an intermittent opening degree increasing mode;
and when the opening degree of the electronic expansion valve reaches the preset opening degree, controlling the electronic expansion valve to be opened in a mode of continuously increasing the opening degree.
In the above preferred technical solution of the control method for a three-pipe heat recovery multi-split air conditioning unit, the determining mode of the preset opening degree is as follows:
continuously opening the electronic expansion valve from a closed state to the target opening degree;
detecting noise values generated by the electronic expansion valve for a plurality of times in the opening process of the electronic expansion valve;
determining a maximum value of the noise value in the changing process according to the noise value generated by the electronic expansion valve detected for a plurality of times;
and determining the opening of the electronic expansion valve corresponding to the maximum value of the noise value to be the preset opening.
In the above preferred technical solution of the control method for a three-pipe heat recovery multi-split air conditioning unit, the step of "detecting the noise value generated by the electronic expansion valve for multiple times" specifically includes:
and detecting the noise value of the electronic expansion valve corresponding to the opening degree when the opening degree of the electronic expansion valve is changed once.
In the above preferred technical solution of the control method for a three-pipe heat recovery multi-split air conditioning unit, the step of determining a maximum value of the noise value in a changing process according to the noise value generated by the electronic expansion valve detected for multiple times specifically includes:
drawing a curve change chart of the noise value relative to the opening according to the noise value generated by the electronic expansion valve detected for a plurality of times;
and determining the maximum value of the noise value in the change process according to the drawn curve change diagram.
In the above preferred technical solution of the control method for a three-pipe heat recovery multi-split air conditioning unit, the step of controlling the electronic expansion valve to be opened to a preset opening degree in an intermittent opening degree increasing manner specifically includes:
the electronic expansion valve is controlled to be opened at a constant speed within a preset time length before every second;
controlling the electronic expansion valve to stop opening in the residual time in each second;
and circularly executing the steps until the electronic expansion valve is opened to the preset opening degree.
In the above preferred technical scheme of the control method for the three-pipe heat recovery multi-split air conditioning unit, the preset speed is an excitation speed of the electronic expansion valve.
In the above preferred technical solution of the control method for a three-pipe heat recovery multi-split air conditioning unit, in the case that the preset opening includes a first preset opening and a second preset opening, the step of "controlling the electronic expansion valve to open to the preset opening in a manner of intermittently increasing the opening" specifically includes:
firstly controlling the electronic expansion valve to be opened to the first preset opening degree in an intermittent opening degree increasing mode;
and then controlling the electronic expansion valve to be opened to the second preset opening degree in a mode of intermittently increasing the opening degree.
In the above preferred technical solution of the control method for a three-pipe heat recovery multi-split air conditioning unit, the step of controlling the electronic expansion valve to be opened to the first preset opening degree in an intermittent opening degree increasing manner specifically includes:
the electronic expansion valve is controlled to be opened at a constant speed within a first preset time length in each second at a preset speed;
controlling the electronic expansion valve to stop opening in the residual time in each second;
and circularly executing the steps until the electronic expansion valve is opened to the first preset opening degree.
In the above preferred technical solution of the control method for a three-pipe heat recovery multi-split air conditioning unit, the step of "controlling the electronic expansion valve to open to the second preset opening in an intermittent increasing opening manner" specifically includes:
the electronic expansion valve is controlled to be opened at a constant speed within a first preset time length in each second;
controlling the electronic expansion valve to stop opening in the residual time in each second;
and circularly executing the steps until the electronic expansion valve is opened to the second preset opening degree.
In a second aspect, the present application further provides a three-pipe heat recovery multi-split air conditioning unit, where the three-pipe heat recovery multi-split air conditioning unit includes a controller, and the controller is capable of executing the control method described in any one of the above preferred technical solutions.
Under the condition that the technical scheme is adopted, the three-pipe type heat recovery multi-split air conditioning unit comprises a plurality of indoor units which are arranged in parallel and a valve box connected with the indoor units, wherein an electronic expansion valve is arranged in the valve box, and the control method comprises the following steps: in the process that the electronic expansion valve is opened to a target opening degree from a closed state, the electronic expansion valve is controlled to be opened to a preset opening degree in an intermittent opening degree increasing mode; and when the opening degree of the electronic expansion valve reaches the preset opening degree, controlling the electronic expansion valve to be opened in a mode of continuously increasing the opening degree. Based on the control mode, the opening process of the electronic expansion valve is divided into a plurality of stages, so that impact of a refrigerant on the electronic expansion valve in the opening process of the electronic expansion valve is effectively slowed down, the noise reduction effect is effectively achieved, and user experience is further improved.
Drawings
Preferred embodiments of the present application are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the overall structure of a three-pipe heat recovery multi-split air conditioning unit of the present application;
FIG. 2 is a flow chart of the main steps of the control method of the present application;
fig. 3 is a graph of opening degree and time of the electronic expansion valve of the present application;
fig. 4 is a graph of the opening degree of the electronic expansion valve versus time in a specific example;
reference numerals:
11. a compressor; 12. an outdoor heat exchanger; 13. a throttle member; 14. an indoor heat exchanger; 15. and a valve box.
Detailed Description
Preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present application, and are not intended to limit the scope of the present application. Those skilled in the art can adapt it as desired to suit a particular application. For example, although the three-pipe heat recovery multi-split air conditioner set described in the preferred embodiment includes three indoor units, this is not limitative, but it is obvious to those skilled in the art that the specific number of indoor units can be set according to the actual use requirement. Such changes in the specific number of indoor units do not depart from the basic principles of the application and fall within the scope of the application.
It should be noted that, in the description of the preferred embodiment, terms such as "inner", "outer", and the like, refer to directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the application. Furthermore, in the description of the present application, unless explicitly stated and limited otherwise, the term "coupled" and the like should be interpreted broadly, as for example, both directly, indirectly, through intermediaries, and in communication between two elements. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it is also to be noted that the specific meaning of the above terms in the present application can be understood by those skilled in the art according to the specific circumstances. Although the various steps of the control method of the present application are described in a particular order in the present application, these orders are not limiting and one skilled in the art may perform the steps in a different order without departing from the basic principles of the present application.
Referring first to fig. 1, the overall structure of the three-pipe heat recovery multi-split air conditioning unit according to the present application is shown. As shown in fig. 1, the three-pipe heat recovery multi-split air conditioning unit of the present application includes an indoor unit part and an outdoor unit part, a refrigerant circulation circuit is provided between the indoor unit part and the outdoor unit part, a refrigerant for exchanging heat between indoor and outdoor is circulated in the refrigerant circulation circuit, and a compressor 11, an outdoor heat exchanger 12, a throttle member 13, an indoor heat exchanger 14, and a valve box 15 (parts shown in a dotted line frame) are provided in the refrigerant circulation circuit; the compressor 11 and the outdoor heat exchanger 12 are disposed in the outdoor unit portion, and the specific disposition position of the throttling member 13 is not limited, so long as the throttling member 13 can perform an overall throttling function on the refrigerant circulation circuit, in the preferred embodiment, the indoor unit portion includes three indoor units, and the indoor heat exchanger 14 and the valve box 15 are disposed in the corresponding indoor units, and it is understood that only one indoor heat exchanger 14 and one valve box 15 may be disposed in one indoor unit, or a plurality of indoor heat exchangers 14 and a plurality of valve boxes 15 may be disposed, so long as the indoor heat exchangers 14 and the valve boxes 15 are disposed correspondingly. The refrigerant circulates continuously between the outdoor heat exchanger 12 and the plurality of indoor heat exchangers 14 through the refrigerant circulation loop to realize heat exchange, each valve box 15 is correspondingly provided with two electronic expansion valves, and the heat exchange state of the corresponding indoor heat exchanger 14 can be controlled by controlling the opening and closing states of the electronic expansion valves.
It should be noted that, the specific structure and composition of the three-pipe type heat recovery multi-split air conditioning unit are not limited in the present application, and a person skilled in the art can set the three-pipe type heat recovery multi-split air conditioning unit according to actual use requirements, as long as the three-pipe type heat recovery multi-split air conditioning unit includes the indoor heat exchanger 14 and the valve box 15 which are correspondingly arranged, and the specific types and the specific number of the indoor heat exchanger 14 and the valve box 15 are not limited.
Further, the three-pipe type heat recovery multi-split air conditioning unit further comprises a controller, and the controller can acquire operation parameters of the three-pipe type heat recovery multi-split air conditioning unit and control the operation state of the three-pipe type heat recovery multi-split air conditioning unit, for example, control the opening and closing states of the electronic expansion valve and the like. It can be understood by those skilled in the art that the present application does not limit the specific structure and model of the controller, and the controller may be the original controller of the three-pipe heat recovery multi-split air conditioner unit, or may be a controller separately provided for executing the control method of the present application, and the technician may set the structure and model of the controller according to the actual use requirement.
Referring next to fig. 2, a flow chart of main steps of the control method of the present application is shown. As shown in fig. 2, based on the three-pipe heat recovery multi-split air conditioning unit described in the above embodiment, the control method of the present application mainly includes the following steps:
s1: in the process that the electronic expansion valve is opened to a target opening degree from a closed state, the electronic expansion valve is controlled to be opened to a preset opening degree in an intermittent opening degree increasing mode;
s2: when the opening of the electronic expansion valve reaches the preset opening, the electronic expansion valve is controlled to be opened in a mode of continuously increasing the opening.
In step S1, in the process of opening the electronic expansion valve from the closed state to the target opening degree, the electronic expansion valve may be any electronic expansion valve in fig. 1, as long as it is an electronic expansion valve in the valve box 15, and the specific value of the target opening degree is not limited in the present application, and a person skilled in the art may set the electronic expansion valve according to the actual use requirement, which is not limited; in the opening process of the electronic expansion valve, the controller controls the electronic expansion valve to be opened to the preset opening in an intermittent opening increasing manner, and it is to be noted that the intermittent opening increasing manner is to increase the opening of the electronic expansion valve at a constant speed within a certain time and stop increasing the opening of the electronic expansion valve within a certain time, and the control manner is repeatedly executed. In addition, the application does not limit the specific value of the preset opening, and the person skilled in the art can set the preset opening according to the actual use requirement.
In step S2, when the opening of the electronic expansion valve reaches the preset opening, the electronic expansion valve is controlled to be opened in a manner of continuously increasing the opening. Specifically, after the opening degree of the electronic expansion valve is controlled to be increased from the closed state to the preset opening degree in the control manner in the step S1, the electronic expansion valve is controlled to be opened in a manner of continuously increasing the opening degree, that is, the electronic expansion valve is continuously increased in a manner of uniformly opening. It should be noted that, the specific value of the preset opening and the opening speed of the electronic expansion valve are not limited, and those skilled in the art can set the electronic expansion valve according to the actual use requirement, which is not limiting.
Based on the control mode, the opening process of the electronic expansion valve is divided into a plurality of stages, so that impact of a refrigerant on the electronic expansion valve in the opening process of the electronic expansion valve is effectively slowed down, the noise reduction effect is effectively achieved, and the user experience is improved.
As a preferred embodiment, the determining manner of the preset opening degree is as follows: continuously opening the electronic expansion valve from a closed state to the target opening degree; detecting noise values generated by the electronic expansion valve for a plurality of times in the opening process of the electronic expansion valve; determining the maximum value of the noise value in the change process according to the noise value generated by the electronic expansion valve detected for multiple times; and determining the opening of the electronic expansion valve corresponding to the maximum value of the noise value to be the preset opening. It should be noted that, the above determination method is preferably performed before the three-pipe type heat recovery multi-split air conditioning unit leaves the factory, and then the test result is stored in the controller, so that the controller can perform corresponding control on the three-pipe type heat recovery multi-split air conditioning unit after leaving the factory. In addition, the present application does not impose any limitation on the way in which the noise value generated by the electronic expansion valve is detected, and preferably, the measurement is performed directly by providing a noise measuring device in the vicinity of the electronic expansion valve.
Further, in the process of determining the preset opening degree, as a preferable mode, the step of "detecting the noise value generated by the electronic expansion valve for multiple times" specifically includes: and detecting the noise value of the electronic expansion valve corresponding to the opening degree when the opening degree of the electronic expansion valve is changed once. It can be understood that the opening degree of the electronic expansion valve is usually required to be adjusted step by step, that is, the corresponding noise value under the opening degree is detected once for every step of adjusting the opening degree of the electronic expansion valve, so as to effectively improve the control accuracy and further improve the noise reduction effect of the electronic expansion valve to the greatest extent.
Further, as a preferred mode of determining the maximum value, "determining the maximum value of the noise value in the course of change according to the noise value generated by the electronic expansion valve detected a plurality of times" specifically includes: drawing a curve change chart of the noise value relative to the opening according to the noise value generated by the electronic expansion valve detected for a plurality of times; and determining the maximum value of the noise value in the change process according to the drawn curve change diagram. Determining the maximum value of the noise value based on the mode of drawing the graph can improve the accuracy of the result to the greatest extent, and further effectively improve the accuracy of the control effect.
Further, as a preferable control method, the control method of the electronic expansion valve to intermittently increase the opening degree is as follows: the electronic expansion valve is controlled to be opened at a constant speed within a preset time length before every second; controlling the electronic expansion valve to stop opening in the residual time in each second; and circularly executing the steps until the electronic expansion valve is opened to the preset opening degree. It should be noted that, the present application does not limit the specific proportion of the time period of the electronic expansion valve for adjusting the opening in each second and the time period of not adjusting the opening, and as a preferred setting mode, when determining how much time period is used in the process of adjusting the electronic expansion valve to the preset opening by detecting the noise value, the present application generates the least noise, and then determines the specific proportion of the time period of adjusting the opening in each second and the time period of not adjusting the opening according to the time period, so as to further improve the noise reduction effect.
Based on the control manner described in the above preferred embodiment, as a preferred example, the number of preset openings is taken as one, that is, in the opening adjustment process of the electronic expansion valve, the case where the noise value generated by the electronic expansion valve has only one maximum value is taken as an example, and the whole opening process of the electronic expansion valve is divided into two control stages. Specifically, as shown in fig. 3, assuming that the maximum opening of the electronic expansion valve is B, and the target opening is set to be the maximum opening B, according to a noise test, it is determined that the flow rate of the electronic expansion valve under the opening a starts to increase sharply, the noise thereof is also the maximum, and the opening a is taken as a boundary point. The method comprises the steps of dividing the opening process of an electronic expansion valve into two parts from 0pls to A pls and from Apls to B pls according to the opening change process of the electronic expansion valve, wherein the control emphasis is on reducing the noise of the adjusting process of 0pls to Apls, assuming that the excitation speed of the electronic expansion valve is v pls/s, determining how many steps of opening the electronic expansion valve per second can be reduced to the minimum according to a noise test, namely, if the noise generated when determining that the opening of the electronic expansion valve finishes the opening change process from 0pls to Apls through t1 time is minimum, obtaining that the step number required to be adjusted by the electronic expansion valve per second is A/t1 pls, obtaining that the time length required to be uniformly opened by the electronic expansion valve per second is A/t1/v seconds according to the excitation speed of the electronic expansion valve, and finally enabling the time length of the electronic expansion valve for keeping the current opening to be 1-A/t1/v seconds in each second to intermittently increase the opening and enabling the opening of the electronic expansion valve to be increased through a preset opening (namely, the time length of opening A to be increased after the opening is preset) of the electronic expansion valve; in the adjusting process of the opening of the electronic expansion valve from Apls to B pls, the flow rate change is not so large, and correspondingly, the generated noise is not very large, so as to effectively ensure the opening speed of the electronic expansion valve, in the adjusting process, the electronic expansion valve is controlled to be continuously opened at the exciting speed at a constant speed, so that the opening of the electronic expansion valve is increased to the target opening (namely the maximum opening B) after the electronic expansion valve is continuously opened at the exciting speed at the constant speed for t2 time, and the noise reduction effect of the electronic expansion valve is ensured to the greatest extent.
Further, as a specific example, as shown in fig. 4, taking the target opening 600pls of the electronic expansion valve, the excitation speed being 31.5pls/s, and 100pls being the maximum value of the noise value as an example, if it is found by the noise test that the noise generated by the electronic expansion valve when the electronic expansion valve is increased to 100pls over 50s is lowest, that is, the electronic expansion valve needs to be opened by 2pls per second, the opening of the electronic expansion valve is increased by 2pls only by 63ms according to the excitation speed of the electronic expansion valve being 31.5pls/s, based on which the opening of the electronic expansion valve is intermittently increased by 63ms per second and 937ms remains to stop the adjustment during the adjustment of the first 50s until the opening of the electronic expansion valve reaches 100pls after the adjustment of 50s in this way. After the opening of the electronic expansion valve reaches 100pls, the electronic expansion valve is continuously opened at the exciting speed all the time in the process of adjusting the opening of the electronic expansion valve from 100pls to 600pls, namely, the opening of the electronic expansion valve is always increased at the speed of 31.5pls/s, and the opening reaches the target opening after 16s of use.
In addition, it should be noted that, when the value of the target opening is large, there may be a plurality of preset openings determined through the noise test, and taking a case that the preset openings include a first preset opening and a second preset opening as an example, the step of "controlling the electronic expansion valve to open to the preset opening in a manner of intermittently increasing the opening" specifically includes: firstly controlling the electronic expansion valve to be opened to the first preset opening degree in an intermittent opening degree increasing mode; and then controlling the electronic expansion valve to be opened to the second preset opening degree in a mode of intermittently increasing the opening degree. Based on the control mode, the application can divide the opening process of the electronic expansion valve into three stages, wherein the first two stages are opened in a mode of intermittently increasing the opening degree, the third stage is opened in a mode of continuously increasing the opening degree, so that the opening speed can be effectively ensured while the noise is reduced to the greatest extent,
specifically, the step of "first controlling the electronic expansion valve to open to the first preset opening degree in a manner of intermittently increasing the opening degree" specifically includes: the electronic expansion valve is controlled to be opened at a constant speed within a first preset time length in each second at a preset speed; controlling the electronic expansion valve to stop opening in the residual time in each second; and circularly executing the steps until the electronic expansion valve is opened to the first preset opening degree. It should be noted that, as a preferred setting manner, the value of the first preset duration is determined by the manner described in the previous embodiment, which is not described herein again.
In addition, the step of "controlling the electronic expansion valve to be opened to the second preset opening degree in an intermittent increasing opening degree" specifically includes: the electronic expansion valve is controlled to be opened at a constant speed within a first preset time length in each second; controlling the electronic expansion valve to stop opening in the residual time in each second; and circularly executing the steps until the electronic expansion valve is opened to the second preset opening degree. It should be noted that, as a preferred setting manner, the value of the second preset duration is determined by the manner described in the previous embodiment, which is not described herein again.
In addition, it should be noted that the present application does not limit the number of stages of the electronic expansion valve in the adjustment process, and a person skilled in the art can set the electronic expansion valve according to the actual use requirement, so long as the electronic expansion valve includes two adjustment stages of intermittently increasing the opening and continuously increasing the opening in the process from the closed state to the target opening.
Thus far, the technical solution of the present application has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will fall within the scope of the present application.
Claims (10)
1. A control method for a three-pipe type heat recovery multi-split air conditioner unit comprises a plurality of indoor units which are arranged in parallel and valve boxes connected with the indoor units, wherein the valve boxes are internally provided with electronic expansion valves,
the control method is characterized by comprising the following steps:
in the process that the electronic expansion valve is opened to a target opening degree from a closed state, the electronic expansion valve is controlled to be opened to a preset opening degree in an intermittent opening degree increasing mode;
and when the opening degree of the electronic expansion valve reaches the preset opening degree, controlling the electronic expansion valve to be opened in a mode of continuously increasing the opening degree.
2. The control method according to claim 1, wherein the predetermined opening degree is determined in the following manner:
continuously opening the electronic expansion valve from a closed state to the target opening degree;
detecting noise values generated by the electronic expansion valve for a plurality of times in the opening process of the electronic expansion valve;
determining a maximum value of the noise value in the changing process according to the noise value generated by the electronic expansion valve detected for a plurality of times;
and determining the opening of the electronic expansion valve corresponding to the maximum value of the noise value to be the preset opening.
3. The control method according to claim 2, wherein the step of detecting the noise value generated by the electronic expansion valve a plurality of times specifically includes:
and detecting the noise value of the electronic expansion valve corresponding to the opening degree when the opening degree of the electronic expansion valve is changed once.
4. The control method according to claim 2, wherein the step of determining a maximum value of the noise value in the course of the change based on the detected noise value generated by the electronic expansion valve a plurality of times includes:
drawing a curve change chart of the noise value relative to the opening according to the noise value generated by the electronic expansion valve detected for a plurality of times;
and determining the maximum value of the noise value in the change process according to the drawn curve change diagram.
5. The control method according to any one of claims 1 to 4, characterized in that the step of controlling the electronic expansion valve to open to a preset opening degree in such a manner as to intermittently increase the opening degree specifically includes:
the electronic expansion valve is controlled to be opened at a constant speed within a preset time length before every second;
controlling the electronic expansion valve to stop opening in the residual time in each second;
and circularly executing the steps until the electronic expansion valve is opened to the preset opening degree.
6. The control method according to claim 5, wherein the preset speed is an excitation speed of the electronic expansion valve.
7. The control method according to any one of claims 1 to 4, characterized in that in the case where the preset opening degree includes a first preset opening degree and a second preset opening degree, the step of "controlling the electronic expansion valve to open to the preset opening degree in such a manner as to intermittently increase the opening degree" specifically includes:
firstly controlling the electronic expansion valve to be opened to the first preset opening degree in an intermittent opening degree increasing mode;
and then controlling the electronic expansion valve to be opened to the second preset opening degree in a mode of intermittently increasing the opening degree.
8. The control method according to claim 7, wherein the step of controlling the electronic expansion valve to open to the first preset opening degree in such a manner as to intermittently increase the opening degree includes:
the electronic expansion valve is controlled to be opened at a constant speed within a first preset time length in each second at a preset speed;
controlling the electronic expansion valve to stop opening in the residual time in each second;
and circularly executing the steps until the electronic expansion valve is opened to the first preset opening degree.
9. The control method according to claim 7, wherein the step of controlling the electronic expansion valve to open to the second preset opening degree in such a manner as to intermittently increase the opening degree includes:
the electronic expansion valve is controlled to be opened at a constant speed within a first preset time length in each second;
controlling the electronic expansion valve to stop opening in the residual time in each second;
and circularly executing the steps until the electronic expansion valve is opened to the second preset opening degree.
10. A three-pipe heat recovery multi-split air conditioning unit, characterized in that it comprises a controller capable of executing the control method according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210380997.2A CN116928808A (en) | 2022-04-12 | 2022-04-12 | Three-pipe type heat recovery multi-split air conditioning unit and control method thereof |
| PCT/CN2023/074346 WO2023197728A1 (en) | 2022-04-12 | 2023-02-03 | Three-pipe heat recovery multi-split air conditioning unit and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210380997.2A CN116928808A (en) | 2022-04-12 | 2022-04-12 | Three-pipe type heat recovery multi-split air conditioning unit and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116928808A true CN116928808A (en) | 2023-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210380997.2A Pending CN116928808A (en) | 2022-04-12 | 2022-04-12 | Three-pipe type heat recovery multi-split air conditioning unit and control method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116928808A (en) |
| WO (1) | WO2023197728A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4179365B2 (en) * | 2006-08-31 | 2008-11-12 | ダイキン工業株式会社 | Air conditioner |
| JP5916488B2 (en) * | 2012-04-06 | 2016-05-11 | 三菱重工業株式会社 | Control apparatus and method, program, and multi-type air conditioning system including the same |
| JP6155824B2 (en) * | 2013-05-08 | 2017-07-05 | ダイキン工業株式会社 | Air conditioner |
| CN108168169B (en) * | 2017-12-01 | 2020-09-18 | 青岛海尔空调电子有限公司 | Noise control method of multi-connected air conditioning system |
| CN108224739B (en) * | 2017-12-01 | 2020-08-18 | 青岛海尔空调电子有限公司 | Noise control method of multi-connected air conditioning system |
-
2022
- 2022-04-12 CN CN202210380997.2A patent/CN116928808A/en active Pending
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2023
- 2023-02-03 WO PCT/CN2023/074346 patent/WO2023197728A1/en unknown
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| Publication number | Publication date |
|---|---|
| WO2023197728A1 (en) | 2023-10-19 |
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