CN111536592B - Fresh air conditioner and air conditioner control method, control device and readable storage medium thereof - Google Patents
Fresh air conditioner and air conditioner control method, control device and readable storage medium thereof Download PDFInfo
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- CN111536592B CN111536592B CN202010402694.7A CN202010402694A CN111536592B CN 111536592 B CN111536592 B CN 111536592B CN 202010402694 A CN202010402694 A CN 202010402694A CN 111536592 B CN111536592 B CN 111536592B
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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
- 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
- F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
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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
- 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
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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
- 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
- F24F1/0083—Indoor units, e.g. fan coil units with dehumidification means
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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
- F24F2110/10—Temperature
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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
- F24F2110/20—Humidity
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner control method, which is applied to a fresh air conditioner, wherein the fresh air conditioner comprises a fresh air heat exchanger and a first electronic expansion valve, the fresh air heat exchanger is connected with the first electronic expansion valve in series, and the air conditioner control method comprises the following steps: when the fresh air heat exchanger is in dehumidification operation, acquiring fresh air temperature and fresh air humidity, and acquiring first temperature of the fresh air heat exchanger; and controlling the first electronic expansion valve to adjust the opening degree according to the fresh air temperature, the fresh air humidity and the first temperature. The invention also discloses an air conditioner control device, a fresh air conditioner and a readable storage medium. The invention aims to improve the dehumidification effect while ensuring the heat exchange efficiency of the fresh air heat exchanger.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner control method, an air conditioner control device, a fresh air conditioner and a readable storage medium.
Background
In order to ensure the indoor air quality, a fresh air module is arranged in most air conditioners, and the air quality in the indoor environment is ensured by introducing fresh air. Wherein, in order to reduce the influence of introducing the new trend to indoor travelling comfort, can set up the new trend heat exchanger in the new trend wind channel in some new trend air conditioner and carry out warm and humid regulation and control to the new trend.
When the fresh air conditioner needs to enter a dehumidification mode, the refrigerant adjusting device corresponding to the fresh air heat exchanger is opened, and the low-temperature refrigerant flows through the fresh air heat exchanger to absorb heat, so that moisture in the fresh air is condensed on the surface of the fresh air heat exchanger. However, refrigerant adjusting device generally opens with fixed aperture, and the refrigerant flow that flows through new trend heat exchanger does not have the actual conditions and the state of heat exchanger that are adapted to the new trend and regulates and control, and the new trend heat exchanger high temperature appears easily or crosses lowly, and wherein, can reduce the dehumidification effect of new trend when the high temperature, the low temperature then reduces the reliability of system operation easily, influences the heat exchange efficiency of new trend heat exchanger, can reduce the dehumidification effect of new trend even. Therefore, the dehumidification effect can be guaranteed while the normal operation of the fresh air heat exchanger cannot be realized by regulating and controlling the refrigerant of the current fresh air heat exchanger.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide an air conditioner control method, aiming at improving the dehumidification effect while ensuring the heat exchange efficiency of a fresh air heat exchanger.
In order to achieve the above object, the present invention provides an air conditioner control method, which is applied to a fresh air conditioner, wherein the fresh air conditioner comprises a fresh air heat exchanger and a first electronic expansion valve, the fresh air heat exchanger is connected in series with the first electronic expansion valve, and the air conditioner control method comprises the following steps:
when the fresh air heat exchanger is in dehumidification operation, acquiring fresh air temperature and fresh air humidity, and acquiring first temperature of the fresh air heat exchanger;
and controlling the first electronic expansion valve to adjust the opening degree according to the fresh air temperature, the fresh air humidity and the first temperature.
Optionally, the step of controlling the opening adjustment of the first electronic expansion valve according to the fresh air temperature, the fresh air humidity and the first temperature comprises:
determining the dew point temperature of the fresh air according to the fresh air humidity and the fresh air temperature;
determining a first adjusting parameter corresponding to the first electronic expansion valve according to the dew point temperature and the first temperature;
and controlling the first electronic expansion valve to adjust the opening degree according to the first adjustment parameter.
Optionally, the first adjustment parameter includes an adjustment direction, and the step of determining the first adjustment parameter corresponding to the first electronic expansion valve according to the dew point temperature and the first temperature includes:
determining a difference between the first temperature and the dew point temperature;
when the difference is larger than or equal to a first threshold value, determining the adjusting direction as a reduction opening degree;
when the difference is smaller than the first threshold and the difference is larger than or equal to a second threshold, determining that the adjustment direction is to maintain the current opening degree;
when the difference value is smaller than the second threshold value, determining that the adjusting direction is an increasing opening degree;
wherein the second threshold is less than the first threshold, and the first threshold is less than or equal to 0.
Optionally, when the difference is smaller than the second threshold, before the step of determining that the adjustment direction is an increased opening degree, the method further includes:
judging whether the first temperature is smaller than a set temperature threshold value or not;
and when the first temperature is lower than the set temperature threshold value, executing the step of determining that the adjusting direction is an increasing opening degree.
Optionally, when the first adjustment parameter further includes an adjustment amplitude, after the step of determining the difference between the first temperature and the dew point temperature, the method further includes:
when the difference value is larger than or equal to the first threshold value or when the difference value is smaller than the second threshold value, determining a value interval in which the difference value is located;
and determining the adjusting amplitude according to the numerical value interval.
Optionally, the step of obtaining fresh air temperature and fresh air humidity includes:
the temperature of the fresh air passing through the fresh air heat exchanger is obtained as the temperature of the fresh air, and the humidity of the fresh air passing through the fresh air heat exchanger is obtained as the humidity of the fresh air.
Optionally, the fresh air conditioner further includes an indoor return air heat exchanger and a second electronic expansion valve, the indoor return air heat exchanger is connected in parallel with the fresh air heat exchanger, the second electronic expansion valve is connected in series with the indoor return air heat exchanger, and the fresh air conditioner further includes, after the step of adjusting the opening degree by the first electronic expansion valve, according to the fresh air temperature, the fresh air humidity and the first temperature:
acquiring a deviation value before and after the first electronic expansion valve adjusts the opening degree;
determining a second adjusting parameter corresponding to the second electronic expansion valve according to the deviation value;
and controlling the second electronic expansion valve to adjust the opening according to the second adjustment parameter.
Optionally, the step of determining a second adjustment parameter corresponding to the second electronic expansion valve according to the deviation value includes:
acquiring a second temperature of a refrigerant, and acquiring a third temperature of the indoor return air heat exchanger before the opening degree of the first electronic expansion valve is adjusted; the second temperature is the temperature before the refrigerant is distributed to the indoor return air heat exchanger and the fresh air heat exchanger;
acquiring a corresponding relation between the deviation value and the second adjusting parameter according to the third temperature and the second temperature;
and substituting the deviation value into the corresponding relation to obtain the second adjusting parameter.
Optionally, when the new trend heat exchanger dehumidifies when moving, acquires new trend temperature and new trend humidity, acquires before the step of the first temperature of new trend heat exchanger, still include:
acquiring fresh air humidity and/or indoor environment humidity;
and when the fresh air humidity and/or the indoor environment humidity are/is greater than a set threshold value, controlling the fresh air heat exchanger to start dehumidifying operation.
In order to achieve the above object, the present application also provides an air conditioning control apparatus, comprising: the air conditioner control method comprises a memory, a processor and an air conditioner control program stored on the memory and capable of running on the processor, wherein the air conditioner control program realizes the steps of the air conditioner control method according to any one of the above items when being executed by the processor.
In addition, in order to realize above-mentioned purpose, this application still provides a new trend air conditioner, new trend air conditioner include the new trend heat exchanger, with the first electronic expansion valve of new trend heat exchanger series connection and as above air conditioner controlling means, first electronic expansion valve with air conditioner controlling means connects.
Further, in order to achieve the above object, the present application also proposes a readable storage medium having stored thereon an air conditioning control program that, when executed by a processor, implements the steps of the air conditioning control method as recited in any one of the above.
The method is applied to a fresh air conditioner, the fresh air conditioner comprises a fresh air heat exchanger and a first electronic expansion valve connected with the fresh air heat exchanger in series, when the fresh air heat exchanger is in dehumidification operation, the fresh air temperature and the fresh air humidity are obtained, the first temperature of the fresh air heat exchanger is obtained, and the first electronic expansion valve is controlled to adjust the opening according to the fresh air temperature, the fresh air humidity and the first temperature. In this way, combine new trend temperature, the temperature of new trend humidity and new trend heat exchanger is adjusted the aperture of first electronic expansion valve, new trend temperature, the relation between the temperature of new trend humidity and new trend heat exchanger can accurately reflect the heat exchange efficiency of heat exchanger to new trend dehumidification effect and heat exchanger, make the refrigerant flow of new trend heat exchanger of flowing through adaptable in the heat exchanger adjust the dehumidification effect of new trend and the heat exchange efficiency of heat exchanger, first electronic expansion valve no longer opens with fixed aperture, and improve the dehumidification effect when realizing guaranteeing new trend heat exchanger heat exchange efficiency.
Drawings
FIG. 1 is a schematic structural diagram of a fresh air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the hardware involved in the operation of the air conditioning control apparatus of the present invention;
FIG. 3 is a flowchart illustrating an embodiment of an air conditioning control method according to the present invention;
FIG. 4 is a schematic flow chart illustrating an air conditioning control method according to another embodiment of the present invention;
FIG. 5 is a detailed flowchart of step S22 in FIG. 4;
fig. 6 is a flowchart illustrating an air conditioner control method according to another embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: the air conditioner control method applied to the fresh air conditioner is provided, wherein the fresh air conditioner comprises a fresh air heat exchanger and a first electronic expansion valve, the fresh air heat exchanger is connected with the first electronic expansion valve in series, and the air conditioner control method comprises the following steps: when the fresh air heat exchanger is in dehumidification operation, acquiring fresh air temperature and fresh air humidity, and acquiring first temperature of the fresh air heat exchanger; and controlling the first electronic expansion valve to adjust the opening degree according to the fresh air temperature, the fresh air humidity and the first temperature.
Because among the prior art, the refrigerant adjusting device that new trend heat exchanger corresponds generally opens with fixed aperture, the refrigerant flow that flows through the new trend heat exchanger does not have the actual conditions who is adapted to the new trend and the state of heat exchanger to regulate and control, it is too high or low excessively to appear new trend heat exchanger temperature easily, wherein, can reduce the dehumidification effect of new trend when the temperature is too high, the temperature is crossed low then reduces the reliability of system operation easily, influence the normal heat transfer of new trend heat exchanger, can reduce the dehumidification effect of new trend even. Therefore, the dehumidification effect can be guaranteed while the normal operation of the fresh air heat exchanger cannot be realized by regulating and controlling the refrigerant of the current fresh air heat exchanger.
The invention provides the solution, and aims to improve the dehumidification effect while ensuring the heat exchange efficiency of the fresh air heat exchanger.
The invention provides a fresh air conditioner which can regulate and control air in an air internal environment through internal circulation and can introduce outdoor fresh air to ensure the indoor air quality.
Referring to fig. 1, the fresh air conditioner specifically includes an indoor return air portion and a fresh air portion, the indoor return air portion specifically includes an indoor return air heat exchanger 11, an indoor fan (not shown), a first air guide assembly (not shown), and the like, and the fresh air portion specifically includes a fresh air heat exchanger 21, a fresh air fan 22, a second air guide assembly 24, and the like. In addition, new trend portion still can be including purifying disinfection module 41 to blow to indoor again after purifying the disinfection to the new trend, guarantee the air quality of new trend.
Specifically, the fresh air conditioner further comprises a shell 01, and the shell 01 can be separated by structural adhesive of a partition plate to form an indoor return air duct 10 and a fresh air duct 20. An indoor fan (not shown), an indoor return air heat exchanger 11 and the like may be provided in the indoor return air duct 10, and a fresh air heat exchanger 21, a fresh air fan 22 and the like may be provided in the fresh air duct 20.
The casing 01 is provided with a return air inlet 101 and a first air outlet 102, the return air inlet 101 and the first air outlet 102 are both communicated with an indoor environment, and the indoor return air duct 10 is respectively connected with the return air inlet 101 and the first air outlet 102. The first air guiding assembly (not shown) may be disposed at the first air outlet 102, and is configured to control opening and closing of the first air outlet 102 and air outlet parameters (such as air outlet volume, air outlet direction, air outlet speed, etc.) of the first air outlet 102. Under the disturbance action of an indoor fan (not shown) on the air flow, the indoor air can enter the indoor return air duct 10 through the return air inlet 101 to exchange heat with the indoor return air heat exchanger 11, and then is blown into the room from the first air outlet 102.
In addition, casing 01 still is provided with new trend import 201 and new trend export 202, and new trend import 201 is used for and outdoor environment intercommunication, and new trend export 202 is used for and indoor environment intercommunication. The second air guiding assembly 24 can be disposed at the fresh air outlet 202, and is configured to control opening and closing of the fresh air outlet 202 and air outlet parameters (such as air outlet volume, air outlet direction, air outlet speed, etc.) of the fresh air outlet 202. The purification and disinfection module can be arranged between the fresh air inlet 201 and the fresh air heat exchanger 21 so as to ensure the cleanness in the fresh air duct 20. Under the disturbance action of the fresh air fan 22 on the air flow, outdoor air enters the fresh air duct 20 from the fresh air inlet 201 to exchange heat with the fresh air heat exchanger 21, and then is blown to the indoor from the fresh air outlet 202.
Furthermore, a detection module can be arranged in the fresh air conditioner and used for detecting the current state parameters of the air conditioner. Specifically, the detection module may include an air quality sensor 31, an indoor temperature and humidity sensor 32, a fresh air temperature and humidity sensor 33, a heat exchanger temperature sensor 34, and the like. The air quality sensor 31 and the indoor temperature and humidity sensor 32 can be specifically arranged at the indoor air return opening 101, the air quality sensor 31 can be used for detecting air quality parameters (such as concentrations of harmful gases such as carbon dioxide and PM 2.5) of the indoor environment, and the indoor temperature and humidity sensor 32 can be used for detecting the temperature and humidity of the indoor environment. Fresh air temperature and humidity sensor 33 is specifically arranged in fresh air duct 20 to detect fresh air humidity and fresh air temperature. Specifically, in this embodiment, the fresh air temperature and humidity sensor 33 is arranged between the fresh air heat exchanger 21 and the fresh air outlet 202 so as to detect the temperature and the humidity of the fresh air after heat exchange. The heat exchanger temperature sensor 34 may be specifically disposed on the coil of the heat exchanger to detect the temperature of the coil of the heat exchanger.
Further, in the present embodiment, in the refrigerant circulation loop of the fresh air conditioner, the indoor return air heat exchanger 11 is connected in parallel with the fresh air heat exchanger 21. The air conditioner also comprises a first electronic expansion valve 201 and a second electronic expansion valve 101, and the refrigerant flowing out of the compressor can be divided into two heat exchangers to exchange heat with air. The second electronic expansion valve 101 is connected in series with the indoor return air heat exchanger 11 and is disposed at a refrigerant inlet of the indoor return air heat exchanger 11 to regulate a flow rate of the refrigerant flowing into the indoor return air heat exchanger 11. The first electronic expansion valve 201 is connected in series with the fresh air heat exchanger 21 and is disposed at a refrigerant inlet of the fresh air heat exchanger 21 to adjust the flow of the refrigerant flowing into the fresh air heat exchanger 21.
Based on above-mentioned fresh air conditioner, this application provides an air conditioner control device to the new trend dehumidification process to above-mentioned fresh air conditioner regulates and control. The air conditioner control device can be arranged outside the shell independently of the fresh air conditioner and can also be arranged in the fresh air conditioner.
In an embodiment of the present invention, referring to fig. 2, an air conditioning control apparatus includes: a processor 1001 (e.g., CPU), memory 1002, etc. The memory 1002 is connected to the processor 1001, and the memory 1002 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1002 may alternatively be a storage device separate from the processor 1001.
The fresh air fan 22, the air quality sensor 31, the indoor temperature and humidity sensor 32, the fresh air temperature and humidity sensor 33, the heat exchanger temperature sensor 34, the indoor fan (not shown), the first air guide assembly (not shown), the second electronic expansion valve 101, the first electronic expansion valve 201 and the like in the fresh air conditioner are all connected with the processor 1001, so that the fresh air dehumidification process of the fresh air conditioner can be regulated.
Those skilled in the art will appreciate that the configuration of the device shown in fig. 2 is not intended to be limiting of the device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 2, an air conditioner control program may be included in the memory 1002, which is a readable storage medium. In the apparatus shown in fig. 2, the processor 1001 may be configured to call an air-conditioning control program stored in the memory 1002, and perform operations of the relevant steps of the air-conditioning control method in the following embodiments.
Based on the fresh air conditioner, the invention also provides an air conditioner control method.
Referring to fig. 3, there is provided a first embodiment of an air conditioning control method of the present invention, including:
step S10, when the fresh air heat exchanger is in dehumidification operation, acquiring fresh air temperature and fresh air humidity, and acquiring first temperature of the fresh air heat exchanger;
when the fresh air heat exchanger dehumidifies, the fresh air heat exchanger is an evaporator, low-temperature refrigerants flow through the fresh air heat exchanger, and moisture in the fresh air forms condensate water on the heat exchanger through heat absorption so as to reduce the moisture of the fresh air passing through the heat exchanger and achieve the dehumidification effect.
Fresh air humidity and fresh air temperature can be detected by a temperature and humidity sensor arranged in a fresh air duct. The fresh air temperature control system comprises a fresh air heat exchanger, a fresh air temperature control device and a fresh air humidity control device, wherein the actual condition of the fresh air blown out from a fresh air outlet is prepared for accurate representation, so that the fresh air humidity is accurately regulated and controlled, the temperature of the fresh air passing through the fresh air heat exchanger is used as the fresh air temperature, and the humidity of. In this embodiment, new trend humidity and new trend humidity detect the new trend humidity and the new trend temperature here through the new trend temperature and humidity sensor who locates between new trend heat exchanger and the new trend export.
The first temperature is specifically detected through a sensor arranged on the coil pipe of the fresh air heat exchanger.
And step S20, controlling the first electronic expansion valve to adjust the opening according to the fresh air temperature, the fresh air humidity and the first temperature.
Different fresh air temperatures, different fresh air humidity and different first temperatures can correspond to adjustment parameters of different electronic expansion valve openings. The adjustment parameters may include an adjustment direction of the first electronic expansion valve, such as increasing the opening degree, decreasing the opening degree, maintaining the current opening degree, and the like. The adjustment parameters may include, in addition to the adjustment direction, an adjustment magnitude of the first electronic expansion valve, and the like.
Based on the influence of the fresh air temperature, the fresh air humidity and the first temperature on the dehumidification effect and the heat exchange effect of the heat exchanger, the corresponding relation among the fresh air temperature, the fresh air humidity, the first temperature and the adjustment parameters of the electronic expansion valve is established. In the corresponding relation, different quantity relations among the fresh air temperature, the fresh air humidity and the first temperature can correspond to different adjustment parameters of the first electronic expansion valve, so that the adjustment parameters of the current first electronic expansion valve are determined based on the quantity relations among the three parameters; in addition, the fresh air temperature, the fresh air humidity and the first temperature can jointly determine corresponding characterization parameters, different numerical value ranges can be correspondingly divided based on the characterization parameters, the different numerical value ranges can correspond to different adjustment parameters of the first electronic expansion valve, so that the corresponding characterization parameters can be determined based on the three parameters, the current adjustment parameters of the first electronic expansion valve can be obtained by determining the numerical value interval where the characterization parameters are located, and the like.
The corresponding relation can be a fixed relation or a corresponding relation which changes along with the operation condition of the fresh air conditioner. Specifically, different dehumidification demands can correspond and have different corresponding relations, and specifically, can be based on new trend humidity, indoor environment humidity and satisfy comfortable required target humidity etc. and confirm current dehumidification demand jointly. And acquiring a corresponding relation based on the dehumidification requirement. And after the corresponding relation among the parameters is obtained, substituting the fresh air temperature, the fresh air humidity and the first temperature into the corresponding relation to obtain an adjusting parameter of the first electronic expansion valve, and adjusting the opening degree of the electronic expansion valve according to the determined adjusting parameter.
When the corresponding adjustment direction of the first electronic expansion valve is to increase or decrease the opening degree, the opening degree can be adjusted in a fixed step length; the adjustment step length of the expansion valve can also be determined based on the actual dehumidification condition (such as combining the fresh air temperature, the fresh air humidity and the first temperature) so as to realize the accurate adjustment of the first electronic expansion valve.
The method for controlling the air conditioner is applied to a fresh air conditioner, the fresh air conditioner comprises a fresh air heat exchanger and a first electronic expansion valve connected with the fresh air heat exchanger in series, on the basis of the method, when the fresh air heat exchanger is in dehumidification operation, fresh air temperature and fresh air humidity are obtained, first temperature of the fresh air heat exchanger is obtained, and the first electronic expansion valve is controlled to adjust opening according to the fresh air temperature, the fresh air humidity and the first temperature. In this way, combine new trend temperature, the temperature of new trend humidity and new trend heat exchanger is adjusted the aperture of first electronic expansion valve, new trend temperature, the relation between the temperature of new trend humidity and new trend heat exchanger can accurately reflect the heat exchange efficiency of heat exchanger to new trend dehumidification effect and heat exchanger, the refrigerant flow that makes the new trend heat exchanger of flowing through is adaptable to be adjusted the dehumidification effect of heat exchanger to the new trend and the heat exchange efficiency of heat exchanger, first electronic expansion valve no longer opens with fixed aperture, thereby improve the dehumidification effect when realizing guaranteeing new trend heat exchanger heat exchange efficiency.
Specifically, before step S10, fresh air humidity and/or indoor environment humidity may be acquired, and when the fresh air humidity and/or the indoor environment humidity are greater than a set threshold value, the fresh air heat exchanger is controlled to start dehumidifying operation. Wherein, the humidity transducer that the new trend humidity accessible was located in the new trend wind channel detects and obtains, and in this embodiment, the new trend humidity detects through the humidity transducer who locates between new trend heat exchanger and the new trend export and obtains. The indoor environment humidity can be detected by a humidity sensor arranged at the air return inlet. The fresh air humidity and the indoor environment humidity can be respectively corresponding to the same or different threshold values according to actual requirements. In this embodiment, the threshold corresponding to the fresh air humidity is 70 RH%, and the threshold corresponding to the indoor environment humidity is 60 RH%. Wherein, when the fresh air humidity is greater than 70 RH%, the fresh air heat exchanger is controlled to start dehumidification operation. Or when the indoor environment humidity is more than 60 RH%, controlling the fresh air heat exchanger to start dehumidifying operation. Or when the humidity of the fresh air is more than 70 RH% and the indoor environment humidity is more than 60 RH%, controlling the fresh air heat exchanger to start dehumidifying operation. Through this mode, in time dehumidify the new trend to avoid blowing in indoor new trend humidity too high and influence indoor environment travelling comfort.
Further, after the step S20, a time period (for example, 60S) may be set at intervals, and the step S10 is returned to be executed to continuously adjust and control the state of the fresh air heat exchanger during the dehumidification operation, so as to ensure that the fresh air heat exchanger can achieve the final fresh air dehumidification effect in the optimal state.
Further, based on the above embodiments, another embodiment of the air conditioner control method of the present application is provided. In another embodiment, referring to fig. 4, the step S20 includes:
step S21, determining the dew point temperature of the fresh air according to the fresh air humidity and the fresh air temperature;
the dew point temperature is a temperature at which the air is cooled to saturation while maintaining a constant air pressure with a constant water vapor content in the air. And calculating the dew point temperature through the current fresh air humidity and the fresh air temperature.
Step S22, determining a first adjustment parameter corresponding to the first electronic expansion valve according to the dew point temperature and the first temperature;
different dew point temperatures and different first temperatures can correspond to different adjustment parameters of the opening degree of the first electronic expansion valve. Specifically, a mapping table may be established among the dew point temperature, the first temperature, and the adjustment parameter of the opening of the first electronic expansion valve. And inquiring a mapping table based on the current dew point temperature and the first temperature, wherein the inquired matching result is used as an adjusting parameter of the opening degree of the current first electronic expansion valve. In addition, different quantity relations between the dew point temperature and the first temperature are different, and the adjustment parameters of different opening degrees can be corresponded. For example, when the first temperature is lower than the dew point temperature, the corresponding opening degree adjustment direction is to maintain the current opening degree to maintain the current dehumidification effect, or when the first temperature is lower than the dew point temperature and is higher than a set threshold value, the corresponding opening degree adjustment direction is to reduce the opening degree to improve the dehumidification effect, and when the first temperature is higher than the dew point temperature, the corresponding opening degree adjustment direction is to increase the opening degree to further reduce the temperature of the fresh air heat exchanger to improve the dehumidification effect.
And step S23, controlling the first electronic expansion valve to adjust the opening degree according to the first adjustment parameter.
And controlling the first electronic expansion valve to increase the opening degree, maintain the current opening degree or decrease the opening degree according to the adjustment direction in the first adjustment parameter. And further, controlling the first electronic expansion valve to increase the opening degree of the corresponding amplitude, maintain the current opening degree or decrease the opening degree of the corresponding amplitude according to the adjustment direction and the adjustment amplitude in the first adjustment parameter.
Specifically, when the adjusting direction comprises increasing the opening degree, controlling the first electronic expansion valve to increase the opening degree; when the adjustment direction comprises the opening degree reduction, controlling the first electronic expansion valve to reduce the opening degree; and when the adjusting direction comprises maintaining the current opening degree, controlling the first electronic expansion valve to maintain the current opening degree.
Wherein, the first adjustment parameter may specifically include an adjustment direction, and in order to ensure timeliness and accuracy of regulation and control of the electronic expansion valve, referring to fig. 5, step S22 may specifically include:
step S221, determining a difference value between the first temperature and the dew point temperature;
in this embodiment, the difference specifically refers to a value obtained by subtracting the dew point temperature from the first temperature. Specifically, when the first temperature is a and the dew point temperature is b, a-b is the difference therebetween.
Step S222, judging whether the difference value is larger than or equal to a first threshold value; if the difference is greater than or equal to the first threshold, go to step S223; if the difference is smaller than the first threshold, go to step S224;
step S223 of determining the adjustment direction as a reduction opening degree;
further, when the difference is greater than or equal to the first threshold value and the first adjustment parameter further includes the adjustment amplitude, the fixed step length may be obtained as the adjustment amplitude, and the adjustment amplitude may also be determined according to an actual situation. Specifically, the value greater than or equal to the first threshold may be divided into a plurality of value intervals, and different adjustment ranges are set for different value intervals. Based on the difference, the value interval where the current difference is located can be determined, and the adjustment amplitude corresponding to the value interval is used as the adjustment amplitude of the current first electronic expansion valve. The larger the absolute value of the difference (which is equivalent to the larger the deviation between the dew point temperature and the first threshold), the larger the corresponding adjustment range of the interval where the difference is located, so that the dehumidification effect of the adjusted heat exchanger on fresh air can be quickly and effectively improved
Step S224, judging whether the difference value is larger than or equal to a second threshold value; wherein the second threshold is less than the first threshold, and the first threshold is less than or equal to 0; if the difference is greater than or equal to the second threshold, go to step S225; if the difference is smaller than the second threshold, step S226 is executed.
The first threshold value and the second threshold value can be set according to the actual operation condition of the air conditioning system and the actual condition of fresh air. Wherein, in order to ensure that there is enough difference between the dew point temperature and the first temperature to ensure better dehumidification effect, the first threshold value and the second threshold value are both values less than 0. In other embodiments, the first threshold may also be set to 0 according to actual requirements. Because the size of new trend wind speed can have certain influence to the dehumidification effect, based on this, the accessible acquires the rotational speed of new trend fan and obtains current new trend wind speed, acquires first threshold value and second threshold value based on new trend wind speed. Wherein, the bigger the new trend wind speed is, the smaller can be the corresponding first threshold value and second threshold value to guarantee the dehumidification effect of heat exchanger to the new trend.
The difference value is greater than or equal to the first threshold value, which indicates that the dehumidification effect of the current fresh air heat exchanger on fresh air is poor, so that the pressure drop of the refrigerant flowing through the first electronic expansion valve is increased by reducing the opening degree of the first electronic expansion valve, the temperature of the fresh air heat exchanger is further reduced, and the dehumidification effect of the fresh air is improved. The difference is less than the second threshold value, indicates that the difference in temperature is great between the temperature of current new trend heat exchanger and the dew point temperature, has enough big dehumidification effect, and in order to avoid the temperature of new trend heat exchanger to hang down and influence heat exchange efficiency and dehumidification effect, at this moment, steerable first electronic expansion valve increases the aperture to the temperature of appropriate improvement heat exchanger guarantees the normal operating of heat exchanger. And when the difference value is between the first threshold value and the second threshold value, the current operation of the heat exchanger has a better dehumidification effect, and the first electronic expansion valve can be controlled to maintain the current opening degree.
Step S225, determining the adjusting direction to maintain the current opening;
in step S226, the adjustment direction is determined to be the increasing opening degree.
Further, when the difference is smaller than the second threshold value and the first adjustment parameter further includes the adjustment amplitude, the fixed step length may be obtained as the adjustment amplitude, and the adjustment amplitude may also be determined according to the actual situation. Specifically, the value smaller than the second threshold may be divided into a plurality of value intervals, and different adjustment ranges are set in different value intervals. Based on the difference, the value interval where the current difference is located can be determined, and the adjustment amplitude corresponding to the value interval is used as the adjustment amplitude of the current first electronic expansion valve. The absolute value of the difference value is larger (the deviation between the dew point temperature and the second threshold value is larger), the adjustment range corresponding to the interval is larger, the heat exchanger after adjustment can effectively avoid the reduction of the heat exchange efficiency, and therefore the fresh air heat exchanger can be guaranteed to have better heat exchange efficiency to dehumidify the fresh air, and the dehumidification effect of the fresh air is guaranteed.
Specifically, in this embodiment, the first threshold may be specifically-0.5, and the second threshold may be specifically-2. On the basis, the dew point temperature is defined as TND, the first temperature of the fresh air heat exchanger is TN2, and when TN2-TND is larger than or equal to-0.5, the opening degree of the first electronic expansion valve is controlled to be reduced; when-0.5 is greater than TN2-TND and is greater than or equal to-2, controlling the first electronic expansion valve to maintain the current opening degree; and when-2 is greater than TN2-TND, controlling the first electronic expansion valve to increase the opening degree.
When the difference is smaller than the second threshold, before step S226, it may be determined whether the first temperature is smaller than the set temperature threshold, and when the first temperature is smaller than the set temperature threshold, step S226 is executed; when the first temperature is greater than the set temperature threshold, the current opening degree may be maintained or the opening degree may be further reduced. Here, the set temperature threshold may be set according to actual conditions (e.g., outdoor ambient temperature, etc.), and may be set to 5 degrees, for example. Because the temperature of new trend heat exchanger crosses the low coil pipe that leads to the new trend heat exchanger easily and frosts, the coil pipe frosts and causes serious influence to the steady operation of the heat exchange efficiency of new trend heat exchanger even whole air conditioning system, based on this, when the new trend heat exchanger is less than and sets for the temperature threshold value, show the condition of frosting to appear easily, then timely increase aperture, make the temperature of new trend heat exchanger coil pipe suitably rise, thereby effectively avoid frosting to the influence of heat exchange efficiency even dehumidification effect, thereby realize the improvement of dehumidification effect when further realizing guaranteeing heat exchanger heat exchange efficiency.
In this embodiment, based on dew point temperature and first temperature, especially based on the difference between dew point temperature and the first temperature, confirm that the first adjustment parameter that corresponds carries out the aperture adjustment to first electronic expansion valve, because the relation between dew point temperature and the first temperature can be accurate carry out the characterization to the dehumidification state of new trend heat exchanger, consequently can further guarantee through above-mentioned mode that the dehumidification effect improves when new trend heat exchanger heat exchange efficiency.
Further, based on any one of the above embodiments, a further embodiment of the air conditioner control method according to the present application is provided, where in the further embodiment, the fresh air conditioner further includes a second electronic expansion valve and an indoor return air heat exchanger, the indoor return air heat exchanger is connected in parallel with the fresh air heat exchanger, and the second electronic expansion valve is connected in series with the indoor return air heat exchanger, based on this, referring to fig. 6, after the step of controlling the first electronic expansion valve to adjust the opening degree according to the fresh air temperature, the fresh air humidity and the first temperature, the method further includes:
step S30, obtaining a deviation value before and after the adjustment of the opening degree of the first electronic expansion valve;
specifically, the opening degree of the first electronic expansion valve before the execution of step S20 may be acquired as the first opening degree, and the current opening degree of the first electronic expansion valve may be acquired as the second opening degree. The difference between the first opening degree and the second opening degree serves as a deviation value here. Specifically, the difference between the first opening degree and the second opening degree is subtracted to obtain the deviation value.
Step S40, determining a second adjustment parameter corresponding to the second electronic expansion valve according to the deviation value;
and adjusting the operation of the state of the indoor return air heat exchanger based on the first electronic expansion valve, wherein different deviation values correspond to different second adjustment parameters. The second adjustment parameter corresponding to the second electronic expansion valve may specifically include an adjustment direction (e.g., increasing the opening degree, maintaining the opening degree, and decreasing the opening degree) of the second electronic expansion valve. In addition to adjusting the direction, the second adjustment parameter corresponding to the second electronic expansion valve may further include an adjustment magnitude of the second electronic expansion valve. And establishing a corresponding relation between the deviation value and a second adjusting parameter corresponding to the second electronic expansion valve in advance, and determining the second adjusting parameter corresponding to the second electronic expansion valve corresponding to the current deviation value based on the corresponding relation. For example, based on the correspondence, when the deviation value is less than 0, it indicates that the flow rate of the refrigerant flowing through the fresh air heat exchanger is increased, and the corresponding flow rate of the refrigerant flowing into the flow path where the indoor return air heat exchanger is located is decreased, which may cause the temperature of the indoor return air heat exchanger to decrease; when the deviation value is greater than 0, the flow of the refrigerant flowing through the fresh air heat exchanger is reduced, and the corresponding flow of the refrigerant flowing into the flow path where the indoor return air heat exchanger is located is increased, which may cause the temperature of the indoor return air heat exchanger to be increased; when the deviation value is 0, the second adjustment parameter may be to maintain the current opening degree.
And step S50, controlling the second electronic expansion valve to adjust the opening according to the second adjustment parameter.
Specifically, the second electronic expansion valve may be controlled to increase, decrease, or maintain the current opening degree according to the adjustment direction and the adjustment magnitude in the second adjustment parameter.
In this embodiment, the opening degree of the second electronic expansion valve is adjusted based on the adjustment characteristic of the first electronic expansion valve, so that when the refrigerant flow of the fresh air heat exchanger is adjusted and controlled, the indoor return air heat exchanger connected in parallel with the fresh air heat exchanger can maintain the original operation state, thereby preventing the refrigerant adjustment and control of the fresh air heat exchanger from influencing the normal heat exchange of the indoor return air heat exchanger
In order to ensure that the determined second adjustment parameter is more accurate, a second temperature before the refrigerant is distributed to the indoor return air heat exchanger and the fresh air heat exchanger is obtained, and a third temperature before the opening of the first electronic expansion valve is adjusted is obtained; acquiring a corresponding relation between the deviation value and the second adjusting parameter according to the third temperature and the second temperature; and substituting the deviation value into the corresponding relation to obtain the second adjusting parameter. The second temperature refers to the temperature before the refrigerant is distributed to the two refrigerant branches of the indoor return air heat exchanger and the fresh air heat exchanger. The third temperature is obtained by acquiring data detected by a temperature sensor provided in the upper coil of the indoor return air heat exchanger before step S20. Because the temperature difference of the refrigerant before throttling, the original temperature of the indoor return air heat exchanger and the like are different, the influence of the regulation and control of the opening degree of the first electronic expansion valve on the indoor return air heat exchanger is different, and therefore different second temperatures and different third temperatures can correspond to different deviation values and corresponding relations between deviation parameters. Based on the above, the corresponding relation between the deviation value of the first electronic expansion valve and the second adjustment parameter of the second electronic expansion valve is obtained based on the second temperature and the third temperature, and the second adjustment parameter corresponding to the current deviation value is determined according to the corresponding relation, so that the adjustment of the second electronic expansion valve is more accurate, the influence of the regulation and control of the first electronic expansion valve on the operation of the indoor return air heat exchanger connected in parallel with the first electronic expansion valve is further reduced, and the normal heat exchange of the indoor return air heat exchanger is ensured while the fresh air dehumidification effect is ensured.
In addition, an embodiment of the present invention further provides a readable storage medium, where an air conditioning control program is stored, and the air conditioning control program, when executed by a processor, implements the relevant steps of any of the above air conditioning control methods.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, a fresh air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The air conditioner control method is characterized by being applied to a fresh air conditioner, wherein the fresh air conditioner comprises a fresh air heat exchanger and a first electronic expansion valve, the fresh air heat exchanger is connected with the first electronic expansion valve in series, the fresh air conditioner further comprises an indoor return air heat exchanger and a second electronic expansion valve, the indoor return air heat exchanger is connected with the fresh air heat exchanger in parallel, the second electronic expansion valve is connected with the indoor return air heat exchanger in series, and the air conditioner control method comprises the following steps:
when the fresh air heat exchanger is in dehumidification operation, acquiring fresh air temperature and fresh air humidity, and acquiring first temperature of the fresh air heat exchanger;
controlling the first electronic expansion valve to adjust the opening according to the fresh air temperature, the fresh air humidity and the first temperature;
acquiring a deviation value before and after the first electronic expansion valve adjusts the opening degree;
determining a second adjusting parameter corresponding to the second electronic expansion valve according to the deviation value;
controlling the second electronic expansion valve to adjust the opening according to the second adjustment parameter;
the step of determining a second adjustment parameter corresponding to the second electronic expansion valve according to the deviation value comprises:
acquiring a second temperature of a refrigerant, and acquiring a third temperature of the indoor return air heat exchanger before the opening degree of the first electronic expansion valve is adjusted; the second temperature is the temperature before the refrigerant is distributed to the indoor return air heat exchanger and the fresh air heat exchanger;
acquiring a corresponding relation between the deviation value and the second adjusting parameter according to the third temperature and the second temperature;
and substituting the deviation value into the corresponding relation to obtain the second adjusting parameter.
2. The air conditioning control method according to claim 1, wherein the step of controlling the first electronic expansion valve to adjust the opening degree according to the fresh air temperature, the fresh air humidity and the first temperature comprises:
determining the dew point temperature of the fresh air according to the fresh air humidity and the fresh air temperature;
determining a first adjusting parameter corresponding to the first electronic expansion valve according to the dew point temperature and the first temperature;
and controlling the first electronic expansion valve to adjust the opening degree according to the first adjustment parameter.
3. The air conditioning control method according to claim 2, wherein the first adjustment parameter comprises an adjustment direction, and the step of determining the first adjustment parameter corresponding to the first electronic expansion valve according to the dew point temperature and the first temperature comprises:
determining a difference between the first temperature and the dew point temperature;
when the difference is larger than or equal to a first threshold value, determining the adjusting direction as a reduction opening degree;
when the difference is smaller than the first threshold and the difference is larger than or equal to a second threshold, determining that the adjustment direction is to maintain the current opening degree;
when the difference value is smaller than the second threshold value, determining that the adjusting direction is an increasing opening degree;
wherein the second threshold is less than the first threshold, and the first threshold is less than or equal to 0.
4. The air conditioning control method according to claim 3, wherein, when the difference is smaller than the second threshold, before the step of determining the adjustment direction as an increase opening degree, further comprising:
judging whether the first temperature is smaller than a set temperature threshold value or not;
and when the first temperature is lower than the set temperature threshold value, executing the step of determining that the adjusting direction is an increasing opening degree.
5. The air conditioning control method of claim 4, wherein when the first adjustment parameter further comprises an adjustment magnitude, the step of determining the difference between the first temperature and the dew point temperature is followed by further comprising:
when the difference value is larger than or equal to the first threshold value or when the difference value is smaller than the second threshold value, determining a value interval in which the difference value is located;
and determining the adjusting amplitude according to the numerical value interval.
6. The air conditioner control method according to any one of claims 2 to 5, wherein the step of acquiring the fresh air temperature and the fresh air humidity comprises:
the temperature of the fresh air passing through the fresh air heat exchanger is obtained as the temperature of the fresh air, and the humidity of the fresh air passing through the fresh air heat exchanger is obtained as the humidity of the fresh air.
7. The air conditioning control method according to any one of claims 1 to 5, wherein before the step of obtaining the fresh air temperature and the fresh air humidity when the fresh air heat exchanger is in the dehumidification operation and obtaining the first temperature of the fresh air heat exchanger, the method further comprises:
acquiring fresh air humidity and/or indoor environment humidity;
and when the fresh air humidity and/or the indoor environment humidity are/is greater than a set threshold value, controlling the fresh air heat exchanger to start dehumidifying operation.
8. An air conditioning control device characterized by comprising: a memory, a processor and an air conditioning control program stored on the memory and executable on the processor, the air conditioning control program when executed by the processor implementing the steps of the air conditioning control method of any one of claims 1 to 7.
9. A fresh air conditioner, characterized in that, fresh air conditioner includes fresh air heat exchanger, with the first electronic expansion valve of fresh air heat exchanger series connection and as in claim 8 the air conditioner controlling means, first electronic expansion valve with the air conditioner controlling means is connected.
10. A readable storage medium, having stored thereon an air conditioning control program, which when executed by a processor, implements the steps of the air conditioning control method according to any one of claims 1 to 7.
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| CN112268356B (en) * | 2020-10-22 | 2022-04-15 | 北京小米移动软件有限公司 | Fresh air temperature and humidity control method, system and device and storage medium |
| CN114636229B (en) * | 2020-12-15 | 2023-11-28 | 广东美的精密模具科技有限公司 | Air conditioner, control method thereof and computer readable storage medium |
| CN114636199B (en) * | 2020-12-16 | 2024-02-20 | 广东美的制冷设备有限公司 | Air conditioner, temperature and humidity regulation method thereof and computer readable storage medium |
| CN112902377B (en) * | 2021-02-10 | 2022-02-18 | 珠海格力电器股份有限公司 | Control system of air conditioner |
| CN113685912B (en) * | 2021-08-02 | 2023-03-21 | 重庆海尔空调器有限公司 | Control method of fresh air conditioner |
| CN114279002B (en) * | 2021-12-21 | 2022-11-25 | 珠海格力电器股份有限公司 | Air conditioning device, control method and combined air conditioning unit |
| CN114659304B (en) * | 2022-03-25 | 2024-03-19 | 青岛海尔空调器有限总公司 | Control method and control system for dehumidification of air conditioner, electronic equipment and storage medium |
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