CN114543299A - Control method for air conditioner and air conditioner - Google Patents

Control method for air conditioner and air conditioner Download PDF

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Publication number
CN114543299A
CN114543299A CN202210068150.0A CN202210068150A CN114543299A CN 114543299 A CN114543299 A CN 114543299A CN 202210068150 A CN202210068150 A CN 202210068150A CN 114543299 A CN114543299 A CN 114543299A
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China
Prior art keywords
temperature
preset
evaporation
air conditioner
difference
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CN202210068150.0A
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Chinese (zh)
Inventor
王伟锋
矫立涛
刘帅
周星宇
尹义金
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Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd, Qingdao Haier Air Conditioning Electric Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Priority to CN202210068150.0A priority Critical patent/CN114543299A/en
Publication of CN114543299A publication Critical patent/CN114543299A/en
Pending legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • 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
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • 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
    • F24F2110/10—Temperature
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention relates to the technical field of intelligent household appliances, and particularly provides a control method for an air conditioner and the air conditioner. The evaporator of the air conditioner comprises at least two evaporation modules which are connected in parallel; the control method comprises the following steps: and acquiring the set temperature and the indoor temperature, and starting the evaporation modules in the corresponding preset number according to the set temperature and the indoor temperature. Through the arrangement, the whole evaporator is prevented from being started under any condition, the air conditioner starts a reasonable number of evaporation modules, the pressure loss of the refrigerant flowing through the evaporator is reduced, and the utilization rate of the evaporator is improved. In case that the air conditioner operates in a cooling mode, the control method further includes: the outlet temperature of each of the activated evaporation modules is acquired respectively, and the opening degree of the control valve of the evaporation module with the minimum outlet temperature is selectively reduced according to the maximum value and the minimum value of the acquired outlet temperatures. Through the arrangement, the refrigerant flowing through the evaporation module can be balanced, and the heat exchange efficiency of the evaporator is improved.

Description

Control method for air conditioner and air conditioner
Technical Field
The invention relates to the technical field of intelligent household appliances, and particularly provides a control method for an air conditioner and the air conditioner.
Background
Along with the improvement of living standard of people, the air conditioner has also gone into thousands of households, the use of domestic air conditioner, central air conditioner is more and more common, and the user also is higher and higher to the requirement of air conditioner comfort level, and the problem that exists also leaks gradually in the air conditioner use, and one of them is exactly the problem that the evaporimeter low-usage of air conditioner.
In the prior art, an air conditioner is generally provided with an integral evaporator, and in the operation process of the air conditioner, no matter how a refrigerant circularly flows, the refrigerant flows through the whole evaporator, when the air conditioner is about to reach a set temperature or a user does not need to refrigerate or heat greatly, the flow rate of the refrigerant is low, and when the refrigerant flows through a pipeline of the whole evaporator, great pressure loss is easily caused, the utilization rate of the evaporator is insufficient, and resource waste is caused.
Therefore, there is a need in the art for a new solution to the above problems.
Disclosure of Invention
The invention aims to solve the technical problems, namely, the problem of resource waste caused by insufficient utilization rate of the evaporator of the existing air conditioner is solved.
In a first aspect, the present invention provides a control method for an air conditioner, where an indoor unit of the air conditioner includes an evaporator, the evaporator includes at least two evaporation modules connected in parallel, each evaporation module includes a module body and an inlet end or outlet end control valve provided to the module body, and the control method includes the following steps: acquiring a set temperature: acquiring indoor temperature; starting a corresponding preset number of evaporation modules according to the set temperature and the indoor temperature; respectively acquiring the outlet temperature of each started evaporation module under the condition that the air conditioner operates in a cooling mode; selectively decreasing the opening degree of the control valve of the evaporation module of which the outlet temperature is minimum according to the maximum value and the minimum value of the acquired outlet temperatures.
In a preferred technical solution of the above control method, the step of "starting a corresponding preset number of the evaporation modules according to the set temperature and the indoor temperature" specifically includes: calculating a temperature difference between the set temperature and the indoor temperature; comparing the temperature difference with a preset temperature; and starting the evaporation modules in corresponding preset number according to the comparison result.
In a preferred technical solution of the above control method, the number of the evaporation modules is greater than or equal to three, and the preset temperatures include a first preset temperature, a second preset temperature and a third preset temperature, wherein the first preset temperature is greater than the second preset temperature, and the second preset temperature is greater than the third preset temperature; the step of comparing the temperature difference with a preset temperature specifically comprises: comparing the temperature difference with the first preset temperature, the second preset temperature and the third preset temperature respectively; the step of starting a corresponding preset number of evaporation modules according to the comparison result specifically comprises: and starting a corresponding preset number of evaporation modules according to the comparison results of the temperature difference and the first preset temperature, the second preset temperature and the third preset temperature respectively.
In a preferred technical solution of the above control method, the step of "starting a corresponding preset number of the evaporation modules according to the comparison result between the temperature difference and the first preset temperature, the second preset temperature, and the third preset temperature respectively" specifically includes: if the temperature difference is greater than or equal to the first preset temperature, starting a first preset number of evaporation modules; if the temperature difference is less than the first preset temperature but greater than or equal to the second preset temperature, starting a second preset number of evaporation modules; if the temperature difference is less than the second preset temperature but greater than the third preset temperature, starting a third preset number of evaporation modules; if the temperature difference is equal to the third preset temperature, the evaporation module is not started; the first preset quantity is larger than the second preset quantity, and the second preset quantity is larger than the third preset quantity.
In a preferred technical solution of the above control method, the first preset number is equal to the total number of the evaporation modules.
In a preferred embodiment of the above control method, the step of selectively decreasing the opening degree of the control valve of the evaporation module having the smallest outlet temperature according to the maximum value and the minimum value of the acquired outlet temperatures specifically includes: calculating the difference value between the maximum value and the minimum value of the obtained outlet temperature; comparing the difference value with a set value; selectively decreasing the opening degree of the control valve of the evaporation module, at which the outlet temperature is minimum, according to the comparison result.
In a preferred embodiment of the above control method, the setting values include a first setting value, a second setting value and a third setting value, where the first setting value is greater than the second setting value, the second setting value is greater than the third setting value, and the step of comparing the difference with the setting value specifically includes: comparing the difference value with the first set value, the second set value and the third set value respectively; the step of selectively decreasing the opening degree of the control valve of the evaporation module, at which the outlet temperature is minimum, according to the comparison result specifically includes: selectively reducing the opening degree of the control valve of the evaporation module having the minimum outlet temperature according to the comparison result between the difference value and the first set value, the second set value and the third set value.
In a preferred embodiment of the above control method, the step of selectively decreasing the opening degree of the control valve of the evaporation module having the smallest outlet temperature according to the comparison result between the difference value and the first set value, the second set value, and the third set value specifically includes: if the difference is greater than or equal to the first set value, reducing the opening of the control valve by a first set opening; if the difference is less than the first set value but greater than or equal to the second set value, decreasing the opening of the control valve by a second set opening; if the difference is less than the second set value but greater than or equal to the third set value, decreasing the opening of the control valve by a third set opening; if the difference is less than the third set value, not reducing the opening degree of the control valve; the first set opening degree is larger than the second set opening degree, and the second set opening degree is larger than the third set opening degree.
In a preferred embodiment of the above control method, after the air conditioner is stably operated, the control method further includes: under the condition that the air conditioner is in a refrigeration mode, respectively acquiring the temperature of a coil of each started evaporation module, and recording the temperature as a first coil temperature; comparing all the acquired first coil temperatures, and determining the minimum coil temperature according to the comparison result; judging whether the minimum coil temperature is lower than a first set temperature or not; selectively adjusting the running frequency of the compressor of the air conditioner according to the judgment result; and/or under the condition that the air conditioner is in a heating mode, respectively acquiring the temperature of the coil of each started evaporation module, and recording the temperature as a second coil temperature; comparing all the obtained second coil temperatures, and determining the maximum coil temperature according to the comparison result; judging whether the maximum coil temperature is greater than a second set temperature; and selectively adjusting the running frequency of the compressor of the air conditioner according to the judgment result.
In a second aspect, the present invention provides an air conditioner comprising a controller configured to be able to perform the control method described above.
In a preferred technical scheme of the present invention, an evaporator of an air conditioner includes at least two evaporation modules connected in parallel, each evaporation module includes a module body and an inlet end or an outlet end control valve provided with the module body, and a control method of the present invention includes: acquiring a set temperature: acquiring indoor temperature; and starting a corresponding preset number of evaporation modules according to the set temperature and the indoor temperature. Through the arrangement, compared with the technical scheme that the integral evaporator is adopted in the prior art, the air conditioner determines the operation number of the evaporation modules according to the set temperature and the indoor temperature in the operation process, not only considers the influence of the set temperature on the operation number of the evaporation modules, but also considers the influence of the indoor temperature on the operation number of the evaporation modules, the consideration is more comprehensive, the most energy-saving starting strategy can be determined, the whole evaporator is prevented from being started under any condition, the pressure loss of a refrigerant flowing through the evaporator is reduced, the utilization rate of the evaporator is improved, the resource waste is avoided, and the use experience of a user is improved. In addition, in case that the air conditioner is operated in a cooling mode, the control method of the present invention further includes the steps of: respectively acquiring the outlet temperature of each started evaporation module; and selectively reducing the opening degree of the control valve of the evaporation module with the minimum outlet temperature according to the maximum value and the minimum value in the acquired outlet temperatures. Through the arrangement, the refrigerant flowing through the evaporation module can be balanced, and the heat exchange efficiency of the evaporator is improved.
Further, after the air conditioner is stably operated, under the condition that the air conditioner is in a cooling mode, the temperature of the first coil pipe of each started evaporation module is respectively obtained; comparing all the acquired first coil temperatures, and determining the minimum coil temperature according to the comparison result; judging whether the minimum coil temperature is less than a first set temperature or not; and selectively adjusting the running frequency of the compressor of the air conditioner according to the judgment result. Through such setting, come adjustment compressor operating frequency according to minimum coil pipe temperature promptly, can in time, accurately judge whether need adjust compressor operating frequency, avoided phenomenons such as the evaporimeter appears subcooling, frosting, ensured the normal operating of evaporimeter, further improved user's use and experienced.
Further, after the air conditioner is stably operated, under the condition that the air conditioner is in a heating mode, the temperature of the second coil of each started evaporation module is respectively obtained; comparing all the obtained second coil temperatures, and determining the maximum coil temperature according to the comparison result; judging whether the maximum coil temperature is greater than a second set temperature or not; and selectively adjusting the running frequency of the compressor of the air conditioner according to the judgment result. Through such setting, come adjustment compressor operating frequency according to the biggest coil pipe temperature promptly, can in time, accurately judge whether need adjust compressor operating frequency, avoid the evaporimeter phenomenon such as overheated to appear, ensure the normal operating of evaporimeter, further improve user's use and experienced.
Drawings
The control method for an air conditioner of the present invention is described below with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural view of an evaporator of an air conditioner of the present invention;
fig. 2 is a flowchart of a control method of an air conditioner of the present invention;
fig. 3 is a flowchart of an embodiment of a control method of an air conditioner of the present invention.
List of reference numerals:
11. a first evaporation module; 12. a second evaporation module; 13. a third evaporation module; 14. a module body; 15. a control valve; 16. a coil pipe; 17. a first temperature sensor; 18. a second temperature sensor.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
For example, although the present invention is described in connection with an air conditioner including only one indoor unit, this is not intended to limit the scope of the present application, and those skilled in the art may also apply the control method of the present application to a multi-split air conditioner without departing from the principles of the present application.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "lower", "right", etc. are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring first to fig. 1, the evaporator of the present invention will be described. Fig. 1 is a schematic structural view of an evaporator of an air conditioner according to the present invention.
The air conditioner comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compressor and a condenser, the indoor unit comprises an evaporator, and the compressor, the evaporator and the condenser jointly form a refrigerant circulation loop of the air conditioner. The arrangement of the above components is common knowledge in the art, and will not be described herein.
As shown in fig. 1, the evaporator of the present invention includes three evaporation modules connected in parallel, which are a first evaporation module 11, a second evaporation module 12 and a third evaporation module 13 from top to bottom, and the structures of the three evaporation modules are completely the same.
Taking the third evaporation module 13 as an example, the third evaporation module 13 includes a module body 14, a control valve 15, a coil 16, a first temperature sensor 17 and a second temperature sensor 18, the control valve 15 is disposed at an inlet end of the module body 14 (i.e., at a lower right end of the paper surface in fig. 1) for turning on and off the third evaporation module 13, the coil 16 is disposed in the module body 14, the first temperature sensor 17 is disposed at an outlet end of the third evaporation module 13, the first temperature sensor 17 is configured to detect an outlet temperature of the third evaporation module 13, the second temperature sensor 18 is disposed on the module body 14, and the second temperature sensor 18 is configured to detect a temperature of the coil 16.
The first temperature sensor 17 and the second temperature sensor 18 are both in communication connection with a controller of the air conditioner so as to transmit detected temperature data to the controller in time.
It should be noted that the number of the evaporation modules is not limited to three, and those skilled in the art can flexibly adjust and set the specific number of the evaporation modules according to the actual use requirement, for example, two, four, five or any number, and in any case, the number of the evaporation modules is adjusted, and all the evaporation modules are connected in parallel.
In addition, it should be noted that, in practical applications, the control valve 15 may be installed at the outlet end of the module body 14 of the evaporation module.
Preferably, the control valve 15 is an electronic shut-off valve. Of course, the control valve 15 may be an electric control valve, an electronic expansion valve, or other control valves.
Referring next to fig. 2, the control method of the present invention will be described. Fig. 2 is a flowchart of a control method of an air conditioner according to the present invention.
As shown in fig. 2, the control method of the present invention includes the steps of:
s100: and acquiring the set temperature.
It should be noted that, in practical applications, the temperature set by the user through the remote controller of the air conditioner may be obtained, or the temperature set by the user through the intelligent terminal in communication connection with the air conditioner may also be obtained, or the temperature set by the user in a voice manner may also be obtained. The intelligent terminal can be a mobile phone, a tablet computer, an intelligent bracelet, an intelligent watch and other terminal equipment.
S200: and acquiring the indoor temperature.
Wherein the indoor temperature can be detected by a temperature sensor provided on a casing of the indoor unit of the air conditioner. Of course, the means for detecting the indoor temperature is not limited to the above example, and may be obtained by any other means as long as the indoor temperature can be detected. Wherein, the indoor temperature is the indoor environment temperature of the evaporator.
S300: and starting a corresponding preset number of evaporation modules according to the set temperature and the indoor temperature.
It should be noted that there are corresponding mapping relationships among the set temperature, the indoor temperature and the operation number of the evaporation modules, a mapping table may be made according to the mapping relationships, and after the set temperature and the indoor temperature are obtained, the specific values of the corresponding preset numbers are queried through the mapping table, or a calculation formula may be designed according to the mapping relationships, and after the set temperature and the indoor temperature are obtained, the two temperature values are substituted into the calculation formula to calculate the specific values of the corresponding preset numbers, and so on.
In addition, it should be noted that the difference or the ratio between the set temperature and the indoor temperature may be calculated first, then a mapping table or a calculation formula is made according to the mapping relationship between the difference or the ratio and the operation number of the evaporation modules, and after the set temperature and the indoor temperature are obtained, the specific values of the preset number are obtained according to the mapping table or the calculation formula, and the like.
S400: the outlet temperature of each of the activated evaporation modules is acquired separately.
It should be noted that, the step and the following steps are executed only when the air conditioner executes the cooling mode, otherwise, the step and the following steps are not executed.
S500: and selectively reducing the opening degree of the control valve of the evaporation module with the minimum outlet temperature according to the maximum value and the minimum value in the acquired outlet temperatures.
The first temperature sensor transmits detected temperature data (namely outlet temperature of the evaporation module) to a controller of the air conditioner, the controller compares the acquired outlet temperatures, selects the maximum outlet temperature and the minimum outlet temperature, and judges whether the opening degree of a control valve of the evaporation module with the minimum outlet temperature needs to be reduced or not according to the two outlet temperatures.
Wherein, whether the opening degree of the control valve of the evaporation module with the minimum outlet temperature needs to be reduced can be judged according to the difference value or the ratio of the two outlet temperatures.
In the above process, the execution sequence of step S100 and step S200 is not limited to the above-mentioned sequence, for example, step S200 may be executed first and then step S100 may be executed, or step S100 and step S200 may be executed simultaneously, which is not limited in this respect.
Preferably, as shown in fig. 3, the step of "starting a corresponding preset number of evaporation modules according to the set temperature and the indoor temperature" in step S300 specifically includes:
s311: a temperature difference between the set temperature and the indoor temperature is calculated.
Wherein the temperature difference Δ T ═ set temperature TsIndoor temperature Tin|
S312: the temperature difference is compared to a preset temperature.
S313: and starting the evaporation modules with corresponding preset number according to the comparison result.
In step S312, the preset temperatures include a first preset temperature, a second preset temperature and a third preset temperature, wherein the first preset temperature is greater than the second preset temperature, and the second preset temperature is greater than the third preset temperature; the temperature difference is compared with a first preset temperature, a second preset temperature and a third preset temperature respectively.
Of course, the preset temperature may include only one or two of the first preset temperature, the second preset temperature and the third preset temperature, or the preset temperature may include other temperatures such as the fourth preset temperature and the fifth preset temperature, and those skilled in the art may flexibly adjust and set the number of the preset temperatures according to actual control requirements, and compare the temperature difference with all the set preset temperatures respectively no matter how many preset temperatures are set.
In step S313, a corresponding preset number of evaporation modules may be started according to the comparison result between the temperature difference and the first preset temperature, the second preset temperature, and the third preset temperature.
Preferably, in step S313, the step of "starting a corresponding preset number of evaporation modules according to the comparison result between the temperature difference and the first preset temperature, the second preset temperature, and the third preset temperature respectively" specifically includes: if the temperature difference is greater than or equal to a first preset temperature, starting a first preset number of evaporation modules; if the temperature difference is less than the first preset temperature but greater than or equal to a second preset temperature, starting a second preset number of evaporation modules; if the temperature difference is less than the second preset temperature but greater than a third preset temperature, starting a third preset number of evaporation modules; and if the temperature difference is equal to the third preset temperature, the evaporation module is not started.
The first preset number is larger than the second preset number, and the second preset number is larger than the third preset number.
Further, the first preset number is equal to the total number of the evaporation modules, for example, the total number of the evaporation modules is three, the first preset number is three, the second preset number is two, and the third preset number is one. Of course, the first preset number may also be smaller than the total number of evaporation modules. The first preset number, the second preset number and the third preset number may be adjusted and set by a person skilled in the art according to the total number of evaporation modules.
The control method of the present invention is further explained below by taking the total number of the evaporation modules as three and the air conditioner as an example of operating in the cooling mode.
If the temperature difference is greater than or equal to the first preset temperature, for example, the first preset temperature is 10 ℃, the temperature difference calculated in the step S311 is 12 ℃, and is greater than the first preset temperature, it indicates that very fast refrigeration is needed indoors at this time, the required refrigeration capacity is very large, and the refrigeration requirement can be met only by starting all the three evaporation modules, so that the three evaporation modules are started, that is, the control valves of the three evaporation modules are all opened.
If the temperature difference is smaller than the first preset temperature but greater than or equal to the second preset temperature, for example, the first preset temperature is 10 ℃, the second preset temperature is 5 ℃, the temperature difference calculated in the step S311 is 8 ℃, and the temperature difference is smaller than the first preset temperature and greater than the second preset temperature, which indicates that the indoor needs to be cooled at a higher speed, the required cooling capacity is very moderate, and the refrigeration needs can be met without completely starting the three evaporation modules, so that the number of the started evaporation modules can be reduced, two evaporation modules are started, that is, only the control valves of the two evaporation modules are opened, and the control valve of the other evaporation module is kept in a closed state.
If the temperature difference is smaller than the second preset temperature but larger than the third preset temperature, for example, the second preset temperature is 5 ℃, the third preset temperature is 0 ℃, the temperature difference calculated in step S311 is 3 ℃, and the temperature difference is smaller than the second preset temperature and larger than the third preset temperature, it is described that the indoor needs to be refrigerated at a normal speed, the required refrigerating capacity is small, the refrigerating requirement can be met without completely starting all the three evaporation modules, and since the temperature difference is smaller than the second preset temperature, the number of the started evaporation modules can be further reduced, and one evaporation module is started, that is, only the control valve of one evaporation module is opened, and the control valves of the other two evaporation modules are kept in a closed state.
If the temperature difference is equal to the third preset temperature, for example, the third preset temperature is 0 ℃, the temperature difference calculated in step S311 is 0 ℃ and is equal to the third preset temperature, which indicates that the set temperature is equal to the indoor temperature, that is, the indoor temperature meets the use requirement of the user, the evaporation module does not need to be started, and therefore, the evaporation module is not started even if the control valves of the three evaporation modules are all kept in the closed state.
It should be noted that the first preset temperature, the second preset temperature and the third preset temperature listed above are only exemplary and not limiting, and those skilled in the art can flexibly adjust and set the specific values of the first preset temperature, the second preset temperature and the third preset temperature according to the actual operation condition of the air conditioner.
Preferably, in step S500, the step of selectively decreasing the opening degree of the control valve of the evaporation module having the smallest outlet temperature according to the maximum value and the minimum value of the acquired outlet temperatures specifically includes:
s511: calculating the difference value between the maximum value and the minimum value of the obtained outlet temperature;
s512: comparing the difference value with a set value;
s513: and selectively reducing the opening degree of the control valve of the evaporation module with the minimum outlet temperature according to the comparison result.
In step S512, the setting values include a first setting value, a second setting value and a third setting value, where the first setting value is greater than the second setting value, the second setting value is greater than the third setting value, and the step of comparing the difference value with the setting value specifically includes: the difference is compared with a first set value, a second set value and a third set value, respectively.
Of course, the setting value may include only one or two of the first setting value, the second setting value and the third setting value, or the setting value may include other setting values such as the fourth setting value and the fifth setting value, and those skilled in the art may flexibly adjust and set the number of the setting values according to actual control requirements, and the difference value may be compared with all the set setting values respectively no matter how many setting values are set.
In step S513, the step of selectively decreasing the opening degree of the control valve of the evaporation module having the smallest outlet temperature according to the comparison result specifically includes:
and selectively reducing the opening degree of the control valve of the evaporation module with the minimum outlet temperature according to the comparison result of the difference value with the first set value, the second set value and the third set value.
The step of selectively decreasing the opening degree of the control valve of the evaporation module having the minimum outlet temperature according to the comparison result between the difference value and the first set value, the second set value, and the third set value specifically includes:
if the difference is greater than or equal to the first set value, reducing the opening of the control valve by a first set opening; if the difference is less than the first set value but greater than or equal to a second set value, reducing the opening of the control valve by a second set opening; if the difference is less than the second set value but greater than or equal to a third set value, reducing the opening of the control valve by a third set opening; if the difference is less than the third set value, the opening degree of the control valve is not reduced; the first set opening degree is larger than the second set opening degree, and the second set opening degree is larger than the third set opening degree.
Illustratively, the first evaporation module, the second evaporation module and the third evaporation module are all operated, the first set value is 8, the second set value is 5, the third set value is 3, the first set opening is 20 steps, the second set opening is 15 steps, and the third set opening is 10 steps.
If the outlet temperature of the first evaporation module is 16 degrees, the outlet temperature of the second evaporation module is 10 degrees, the outlet temperature of the third evaporation module is 6 degrees, the outlet temperature of the first evaporation module is the largest, the outlet temperature of the third evaporation module is the smallest, and the difference value between the outlet temperature of the first evaporation module and the outlet temperature of the third evaporation module is 10 and is larger than a first set value, the opening degree of a control valve of the third evaporation module is reduced by 20 steps (first set opening degree).
If the outlet temperature of the first evaporation module is 15 degrees, the outlet temperature of the second evaporation module is 13 degrees, the outlet temperature of the third evaporation module is 9 degrees, the outlet temperature of the first evaporation module is the largest, the outlet temperature of the third evaporation module is the smallest, and the difference value between the outlet temperature of the first evaporation module and the outlet temperature of the third evaporation module is 6, is smaller than the first set value but larger than the second set value, the opening degree of the control valve of the third evaporation module is reduced by 15 steps (second set opening degree).
If the outlet temperature of the first evaporation module is 14 degrees, the outlet temperature of the second evaporation module is 13 degrees, the outlet temperature of the third evaporation module is 10 degrees, the outlet temperature of the first evaporation module is the largest, the outlet temperature of the third evaporation module is the smallest, the difference value between the outlet temperature of the first evaporation module and the outlet temperature of the third evaporation module is 4, and the difference value is smaller than the second set value but larger than the third set value, the opening degree of a control valve of the third evaporation module is reduced by 10 steps (third set opening degree).
If the outlet temperature of the first evaporation module is 14 ℃, the outlet temperature of the second evaporation module is 13 ℃, the outlet temperature of the third evaporation module is 12 ℃, the outlet temperature of the first evaporation module is the largest, the outlet temperature of the third evaporation module is the smallest, and the difference between the outlet temperature of the first evaporation module and the outlet temperature of the third evaporation module is 2 and is smaller than a third set value, the opening degree of a control valve of the evaporation module is not reduced.
It should be noted that, after adjusting the opening degree of the control valve each time, the outlet temperature of each activated evaporation module is obtained again at preset time intervals (for example, 5 minutes), and according to the maximum value and the minimum value of the obtained outlet temperatures, the opening degree of the control valve of the evaporation module with the minimum outlet temperature is selectively decreased until the difference between the maximum value and the minimum value of the obtained outlet temperatures is smaller than the third set value. At this time, the air conditioner reaches a stable operation state.
Preferably, in a case where the air conditioner is in the cooling mode, after the air conditioner is stably operated, the control method of the present invention further includes the steps of:
s711: respectively acquiring the temperature of the coil of each started evaporation module, and recording as the first coil temperature;
s712: comparing all the acquired first coil temperatures, and determining the minimum coil temperature according to the comparison result;
s713: judging whether the minimum coil temperature is less than a first set temperature or not;
s714: and selectively adjusting the running frequency of the compressor of the air conditioner according to the judgment result.
The following further illustrates the operation of all three evaporation modules.
In step S711, the first coil temperatures of each of the activated evaporation modules may be respectively detected by a second temperature sensor disposed on each of the evaporation modules, for example, the detected first coil temperatures of the three evaporation modules are 5 ℃, 8 ℃ and 10 ℃ respectively; alternatively, the first coil temperatures of the three evaporation modules were detected at 7 ℃, 9 ℃ and 11 ℃, respectively. Of course, the means for detecting the first coil temperature is not limited to the above example, and may be obtained by any other means, and any means may be adopted as long as the first coil temperature can be detected.
In step S712, for example, the first coil temperatures detected in step S711 are 5 ℃, 8 ℃ and 10 ℃, respectively, and 5 ℃, 8 ℃ and 10 ℃ are compared, and if the comparison shows that 5 ℃ is the minimum, 5 ℃ is determined as the minimum coil temperature.
For another example, the first coil temperatures detected in step S711 are 7 ℃, 9 ℃ and 11 ℃, respectively, and 7 ℃, 9 ℃ and 11 ℃ are compared, and if the comparison shows that 7 ℃ is the minimum, 7 ℃ is determined as the minimum coil temperature.
It should be noted that the first coil temperature listed above is only an example, and not a limitation, and those skilled in the art can determine the first coil temperature according to the detection result of the actual coil temperature in practical applications.
Preferably, the step of "selectively adjusting the operating frequency of the compressor of the air conditioner according to the determination result" in the step S714 specifically includes:
s721: if the minimum coil temperature is less than the first set temperature, reducing the compressor operating frequency;
s722: if the minimum coil temperature is greater than or equal to the first set temperature, the compressor operating frequency is not adjusted.
In step S721, if the minimum coil temperature is less than the first set temperature, for example, the first set temperature is 6 ℃, and the minimum coil temperature determined in step S712 is 5 ℃ and less than the first set temperature, it is described that the coil temperature of the evaporation module corresponding to the minimum coil temperature is relatively low, and phenomena such as supercooling and frosting are likely to occur, in order to avoid the above phenomena, the operation frequency of the compressor is reduced, so that the coil temperature of the evaporation module is increased, the normal operation of the evaporator is ensured, and the use experience of the user is further improved.
In step S722, if the minimum coil temperature is greater than or equal to the first set temperature, for example, the first set temperature is 6 ℃, and the minimum coil temperature determined in step S712 is 7 ℃ and greater than the first set temperature, it is described that the coil temperature of the evaporation module corresponding to the minimum coil temperature is not low, the coil temperatures of other evaporation modules are not low, the coil temperatures of all the started evaporation modules are normal, and the evaporator can normally operate, the operation frequency of the compressor does not need to be adjusted.
It should be noted that the first set temperature and the minimum coil temperature listed above are only exemplary and not restrictive, and those skilled in the art can flexibly adjust and set the first set temperature according to the actual operation condition of the air conditioner, etc., and determine the minimum coil temperature according to the actually detected first coil temperature.
It should be further noted that, in the foregoing process, step S721 and step S722 are not in sequence, are parallel, and are only related to the determination result of whether the minimum coil temperature is less than the first set temperature, and corresponding steps may be executed according to different determination results.
Preferably, in a case where the air conditioner is in a heating mode, after the air conditioner is stably operated, the control method of the present invention further includes the steps of:
s611: respectively acquiring the temperature of the coil of each started evaporation module, and recording the temperature as a second coil temperature;
s612: comparing all the obtained second coil temperatures, and determining the maximum coil temperature according to the comparison result;
s613: judging whether the maximum coil temperature is greater than a second set temperature or not;
s614: and selectively adjusting the running frequency of the compressor of the air conditioner according to the judgment result.
The two evaporation modules are activated as an example and further explained below.
In step S611, the activated second coil temperature of each evaporation module can be detected by a second temperature sensor disposed on each evaporation module, for example, the detected second coil temperatures of two evaporation modules are 49 ℃ and 53 ℃, respectively; alternatively, the second coil temperatures of the two evaporation modules were detected at 47 ℃ and 50 ℃, respectively. Of course, the means for detecting the temperature of the second coil is not limited to the above example, and may be obtained by any other means, so long as the temperature of the second coil can be detected.
In step S612, for example, the second coil temperatures detected in step S611 are 49 ℃ and 53 ℃, respectively, 49 ℃ and 53 ℃ are compared, and if 53 ℃ is the largest as a result of the comparison, 53 ℃ is determined as the maximum coil temperature.
For another example, the second coil temperatures detected in step S611 are 47 ℃ and 50 ℃, respectively, 47 ℃ and 50 ℃ are compared, and if the comparison shows that 50 ℃ is the maximum, 50 ℃ is determined as the maximum coil temperature.
It should be noted that the above-listed second coil temperature is only exemplary, and not limiting, and those skilled in the art can determine the second coil temperature according to the detection result of the actual coil temperature in practical application.
Preferably, in step S614, the step of "selectively adjusting the operating frequency of the compressor of the air conditioner according to the determination result" includes:
s621: if the maximum coil temperature is greater than the second set temperature, reducing the compressor operating frequency;
s622: if the maximum coil temperature is less than or equal to the second set temperature, then the compressor operating frequency is not adjusted.
In step S621, if the maximum coil temperature is greater than the second set temperature, for example, the second set temperature is 52 ℃, and the maximum coil temperature determined in step S612 is 53 ℃ and greater than the second set temperature, it indicates that the coil temperature of the evaporation module corresponding to the maximum coil temperature is relatively high, and phenomena such as overheating may possibly occur.
In step S622, if the minimum coil temperature is less than or equal to a second set temperature, for example, the second set temperature is 52 ℃, the maximum coil temperature determined in step S612 is 50 ℃, and is less than the second set temperature, it indicates that the coil temperature of the evaporation module corresponding to the maximum coil temperature is not too high, the coil temperatures of other evaporation modules are not too high, the coil temperatures of all the started evaporation modules are normal, and the evaporator can normally operate, so the operation frequency of the compressor does not need to be adjusted.
It should be noted that the second set temperature and the maximum coil temperature listed above are only exemplary and not restrictive, and those skilled in the art can flexibly adjust and set the second set temperature according to the actual operation condition of the air conditioner, etc., and determine the maximum coil temperature according to the actually detected second coil temperature.
It should be further noted that, in the foregoing process, step S621 and step S622 are not in sequence, are parallel, and are only related to the determination result of whether the maximum coil temperature is greater than the second set temperature, and corresponding steps may be executed according to different determination results.
So far, the technical solutions of the present invention have 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 the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (10)

1. A control method for an air conditioner is characterized in that an indoor unit of the air conditioner comprises an evaporator, the evaporator comprises at least two evaporation modules which are connected in parallel, each evaporation module comprises a module body and an inlet end or outlet end control valve which is arranged on the module body,
the control method comprises the following steps:
acquiring a set temperature:
acquiring indoor temperature;
starting a corresponding preset number of evaporation modules according to the set temperature and the indoor temperature;
respectively acquiring the outlet temperature of each started evaporation module under the condition that the air conditioner operates in a cooling mode;
selectively reducing the opening degree of the control valve of the evaporation module with the minimum outlet temperature according to the maximum value and the minimum value of the acquired outlet temperatures.
2. The control method according to claim 1, wherein the step of activating a corresponding preset number of the evaporation modules according to the set temperature and the indoor temperature specifically comprises:
calculating a temperature difference between the set temperature and the indoor temperature;
comparing the temperature difference with a preset temperature;
and starting the evaporation modules in corresponding preset number according to the comparison result.
3. The control method according to claim 2, wherein the number of the evaporation modules is greater than or equal to three, and the preset temperatures include a first preset temperature, a second preset temperature and a third preset temperature, wherein the first preset temperature is greater than the second preset temperature, and the second preset temperature is greater than the third preset temperature;
the step of comparing the temperature difference with a preset temperature specifically comprises:
comparing the temperature difference with the first preset temperature, the second preset temperature and the third preset temperature respectively;
the step of starting the evaporation modules with the corresponding preset number according to the comparison result specifically comprises the following steps:
and starting a corresponding preset number of evaporation modules according to the comparison results of the temperature difference and the first preset temperature, the second preset temperature and the third preset temperature respectively.
4. The control method according to claim 3, wherein the step of activating a corresponding preset number of the evaporation modules according to the comparison result between the temperature difference and the first preset temperature, the second preset temperature and the third preset temperature respectively comprises:
if the temperature difference is greater than or equal to the first preset temperature, starting a first preset number of evaporation modules;
if the temperature difference is less than the first preset temperature but greater than or equal to the second preset temperature, starting a second preset number of evaporation modules;
if the temperature difference is less than the second preset temperature but greater than the third preset temperature, starting a third preset number of evaporation modules;
if the temperature difference is equal to the third preset temperature, the evaporation module is not started;
the first preset quantity is larger than the second preset quantity, and the second preset quantity is larger than the third preset quantity.
5. The control method according to claim 4, characterized in that said first preset number is equal to the total number of said evaporation modules.
6. The control method according to claim 1, wherein the step of selectively decreasing the opening degree of the control valve of the evaporation module, at which the outlet temperature is minimum, according to the maximum value and the minimum value among the acquired outlet temperatures, specifically comprises:
calculating the difference value between the maximum value and the minimum value of the obtained outlet temperature;
comparing the difference value with a set value;
selectively decreasing the opening degree of the control valve of the evaporation module, at which the outlet temperature is minimum, according to the comparison result.
7. The control method according to claim 6, wherein the set values include a first set value, a second set value, and a third set value, wherein the first set value is larger than the second set value, and the second set value is larger than the third set value,
the step of "comparing the difference with a set value" specifically includes:
comparing the difference value with the first set value, the second set value and the third set value respectively;
the step of selectively decreasing the opening degree of the control valve of the evaporation module, at which the outlet temperature is minimum, according to the comparison result specifically includes:
selectively reducing the opening degree of the control valve of the evaporation module having the minimum outlet temperature according to the comparison result between the difference value and the first set value, the second set value and the third set value.
8. The control method according to claim 7, wherein the step of selectively reducing the opening degree of the control valve of the evaporation module, at which the outlet temperature is minimum, according to the comparison result of the difference value with the first set value, the second set value, and the third set value, respectively, specifically comprises:
if the difference is greater than or equal to the first set value, reducing the opening of the control valve by a first set opening;
if the difference is less than the first set value but greater than or equal to the second set value, decreasing the opening of the control valve by a second set opening;
if the difference is less than the second set value but greater than or equal to the third set value, decreasing the opening of the control valve by a third set opening;
if the difference is less than the third set value, not reducing the opening degree of the control valve;
the first set opening degree is larger than the second set opening degree, and the second set opening degree is larger than the third set opening degree.
9. The control method according to any one of claims 1 to 8, further comprising, after the air conditioner is stably operated:
under the condition that the air conditioner is in a refrigeration mode, respectively acquiring the temperature of a coil of each started evaporation module, and recording the temperature as a first coil temperature;
comparing all the acquired first coil temperatures, and determining the minimum coil temperature according to the comparison result;
judging whether the minimum coil temperature is lower than a first set temperature or not;
selectively adjusting the running frequency of the compressor of the air conditioner according to the judgment result; and/or
Under the condition that the air conditioner is in a heating mode, respectively acquiring the temperature of a coil of each started evaporation module, and recording the temperature as a second coil temperature;
comparing all the obtained second coil temperatures, and determining the maximum coil temperature according to the comparison result;
judging whether the maximum coil temperature is greater than a second set temperature;
and selectively adjusting the running frequency of the compressor of the air conditioner according to the judgment result.
10. An air conditioner comprising a controller, characterized in that the controller is configured to be able to execute the control method according to any one of claims 1 to 9.
CN202210068150.0A 2022-01-20 2022-01-20 Control method for air conditioner and air conditioner Pending CN114543299A (en)

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Publication number Priority date Publication date Assignee Title
CN205403255U (en) * 2016-02-23 2016-07-27 山东朗进科技股份有限公司 Air conditioner evaporimeter and install air conditioner of this evaporimeter
CN107560079A (en) * 2017-09-04 2018-01-09 青岛海尔空调器有限总公司 Control method and device, air-conditioning for antifrost
JP2018132217A (en) * 2017-02-13 2018-08-23 株式会社富士通ゼネラル Air conditioning equipment
CN109114847A (en) * 2018-09-25 2019-01-01 珠海格力电器股份有限公司 Air conditioner and control method thereof
CN110260416A (en) * 2019-05-28 2019-09-20 青岛海信日立空调系统有限公司 The control method of subregion heat exchanger assembly, air conditioner and subregion heat exchanger assembly
CN112254292A (en) * 2020-09-22 2021-01-22 青岛海尔空调器有限总公司 Method and device for controlling double-evaporator air conditioning system and air conditioner
CN112856714A (en) * 2021-02-19 2021-05-28 青岛海尔空调器有限总公司 Refrigerant flow control method and device, electronic equipment and air conditioner

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205403255U (en) * 2016-02-23 2016-07-27 山东朗进科技股份有限公司 Air conditioner evaporimeter and install air conditioner of this evaporimeter
JP2018132217A (en) * 2017-02-13 2018-08-23 株式会社富士通ゼネラル Air conditioning equipment
CN107560079A (en) * 2017-09-04 2018-01-09 青岛海尔空调器有限总公司 Control method and device, air-conditioning for antifrost
CN109114847A (en) * 2018-09-25 2019-01-01 珠海格力电器股份有限公司 Air conditioner and control method thereof
CN110260416A (en) * 2019-05-28 2019-09-20 青岛海信日立空调系统有限公司 The control method of subregion heat exchanger assembly, air conditioner and subregion heat exchanger assembly
CN112254292A (en) * 2020-09-22 2021-01-22 青岛海尔空调器有限总公司 Method and device for controlling double-evaporator air conditioning system and air conditioner
CN112856714A (en) * 2021-02-19 2021-05-28 青岛海尔空调器有限总公司 Refrigerant flow control method and device, electronic equipment and air conditioner

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Application publication date: 20220527