CN111442507B - Air conditioner and control method and device thereof - Google Patents
Air conditioner and control method and device thereof Download PDFInfo
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- CN111442507B CN111442507B CN202010263780.4A CN202010263780A CN111442507B CN 111442507 B CN111442507 B CN 111442507B CN 202010263780 A CN202010263780 A CN 202010263780A CN 111442507 B CN111442507 B CN 111442507B
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
Abstract
The invention discloses an air conditioner and a control method and a control device thereof, wherein the air conditioner comprises an outdoor unit, an indoor unit and a first regulating valve arranged on a low-pressure air pipe, and the control method comprises the following steps: the method comprises the steps that when the air conditioner is in a refrigeration mode, target evaporation temperature of an indoor unit and evaporation temperature of the indoor unit are obtained; and adjusting the opening degree of the first adjusting valve according to the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit. The control method of the air conditioner can realize independent regulation of the evaporating temperature of the indoor unit, thereby improving the indoor comfort level.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a control method of an air conditioner, a control device of the air conditioner and the air conditioner with the control device.
Background
The multi-split air conditioner is widely applied to various large-scale office buildings, hospitals, villas and the like, and the diversity and the use characteristics of users are different, so that the requirements of different users on room temperature and humidity at the same time are possibly different. When the existing multi-split air conditioning system runs in a refrigeration mode, the evaporation temperature of an evaporator of an indoor unit is usually fixed within a load range which can be processed by the system, and the temperature of a room can be controlled only by starting and stopping the indoor unit. Due to the presence of long piping attenuations, in order to ensure adequate cooling and dehumidification capacity in all rooms, the manufacturer sets the evaporation temperature at a relatively low temperature (e.g., 6 ℃) which tends to be a large margin for the near-end internal machine. Therefore, the refrigerating and dehumidifying capacity of the indoor unit at the near end is too strong, the indoor unit is easy to frequently start and stop and excessively dehumidify, a user feels too dry and uneven cold and heat, and the comfort of a room is reduced.
In the related art, there are multi-split systems with adjustable evaporation temperature control, but all aim at energy saving, and there are the following problems: the evaporating temperature of the system must meet the requirements of all indoor units, if the distance difference between the indoor units in the system and the host is large, or the load of one indoor unit in the system is large, in order to ensure the capacities of the indoor units with large load and long distance, the evaporating temperature of the system still cannot be increased, and the problems of frequent start-stop, excessive dehumidification and the like of the rest low-load indoor units in the system still occur.
In the related art, a method of providing a temperature and humidity sensor in an indoor unit of an air conditioning system to detect humidity of indoor air has been proposed, but the humidity sensor detects humidity, and generally, the dehumidification function is automatically turned on when the detected humidity is too high, and the system does not take any countermeasures when the humidity of air is too low.
Disclosure of Invention
The present invention is directed to solving, at least in part, one of the technical problems in the related art.
Therefore, a first objective of the present invention is to provide a control method for an air conditioner, which can realize independent adjustment of the evaporating temperature of an indoor unit, thereby improving indoor comfort.
A second object of the present invention is to provide a control device for an air conditioner.
The third purpose of the invention is to provide an air conditioner.
A fourth object of the invention is to propose an electronic device.
A fifth object of the present invention is to propose a computer-readable storage medium.
In order to achieve the above object, a first aspect of the present invention provides a control method for an air conditioner, the air conditioner including an outdoor unit, an indoor unit, and a first regulating valve disposed on a low pressure air pipe, the control method including: the air conditioner is in a refrigeration mode, and the target evaporation temperature and the indoor unit evaporation temperature of the indoor unit are obtained; and adjusting the opening degree of the first adjusting valve according to the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit.
According to the control method of the air conditioner, the air conditioner is in a refrigeration mode, the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit are obtained, and the opening degree of the first regulating valve is regulated according to the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit. Therefore, the method can realize independent adjustment of the evaporation temperature of the indoor unit by adjusting the adjustable first adjusting valve, so that the indoor comfort level is improved.
In addition, the control method of the air conditioner according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the adjusting the opening of the first adjusting valve according to the indoor unit target evaporation temperature and the indoor unit evaporation temperature includes: acquiring a first difference temperature between the indoor unit evaporation temperature and the indoor unit target evaporation temperature; if the first difference temperature is higher than a preset first difference temperature threshold, controlling the opening of the first regulating valve to increase the set opening, wherein the first difference temperature threshold is higher than zero; if the first difference temperature is lower than the negative of the first difference temperature threshold, controlling the opening degree of the first regulating valve to reduce the set opening degree; and if the first difference temperature is not lower than the negative number of the first difference temperature threshold and not higher than the first difference temperature threshold, controlling the first regulating valve to keep the current opening.
According to an embodiment of the present invention, the method for controlling an air conditioner further includes: acquiring the inlet temperature of an indoor unit evaporator and the middle temperature of the indoor unit evaporator; and taking the smaller value of the inlet temperature of the indoor unit evaporator and the middle temperature of the indoor unit evaporator as the indoor unit evaporation temperature.
According to one embodiment of the invention, the initial opening of the first regulating valve is a preset maximum opening.
According to an embodiment of the present invention, the method for controlling an air conditioner further includes: taking the target evaporation temperature of the air conditioner system as an initial value of the target evaporation temperature of the indoor unit; acquiring the return air temperature, the set temperature, the indoor humidity and the set humidity of the indoor unit; and adjusting the target evaporating temperature of the indoor unit according to the return air temperature of the indoor unit, the set temperature, the indoor humidity and the set humidity.
According to an embodiment of the present invention, the adjusting the indoor unit target evaporation temperature according to the indoor unit return air temperature, the set temperature, the indoor humidity, and the set humidity includes: acquiring a second difference temperature between the return air temperature of the indoor unit and the set temperature; acquiring the difference humidity between the indoor humidity and the set humidity; if the second difference temperature is higher than a preset second difference temperature threshold value and the duration time exceeds a preset first time threshold value and the target evaporation temperature of the indoor unit is higher than the target evaporation temperature of the air conditioner system, controlling the target evaporation temperature of the indoor unit to reduce a set value, wherein the second difference temperature threshold value is higher than zero; if the second difference temperature is not higher than the second difference temperature threshold, the difference humidity is higher than a preset first relative humidity threshold, and the target evaporation temperature of the indoor unit is higher than the target evaporation temperature of the air conditioner system, controlling the target evaporation temperature of the indoor unit to reduce the set value, and the first relative humidity threshold is higher than zero; and if the second difference temperature is not higher than the second difference temperature threshold and the difference humidity is not higher than the first relative humidity threshold, controlling the target evaporation temperature of the indoor unit to increase by the set value.
According to an embodiment of the present invention, the controlling the target evaporating temperature of the indoor unit to increase the set value includes: and if the difference humidity is lower than a preset second relative humidity threshold, controlling the target evaporation temperature of the indoor unit to increase by the set value, wherein the second relative humidity threshold is higher than zero.
According to an embodiment of the present invention, the controlling the target evaporating temperature of the indoor unit to increase the set value further includes: and if the difference humidity is not lower than the second relative humidity threshold, the air conditioner reaches a temperature standby state, and the time of the temperature standby state of the air conditioner is shorter than a preset second time threshold, controlling the target evaporation temperature of the indoor unit to increase the set value.
In order to achieve the above object, a second embodiment of the present invention provides a control device for an air conditioner, including: the air conditioner includes off-premises station, indoor set and sets up the first governing valve on the low-pressure gas pipe, controlling means includes: the acquisition module is used for acquiring the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit when the air conditioner is in a refrigeration mode; and the adjusting module is used for adjusting the opening of the first adjusting valve according to the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit.
According to the control device of the air conditioner, the air conditioner is in a refrigeration mode, the acquisition module acquires the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit, and the adjusting module adjusts the opening of the first adjusting valve according to the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit. Therefore, the device can realize independent adjustment of the evaporation temperature of the indoor unit by adjusting the adjustable first adjusting valve, so that the indoor comfort level is improved.
In addition, the control device of the air conditioner according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, when the adjusting module adjusts the opening of the first adjusting valve according to the indoor unit target evaporation temperature and the indoor unit evaporation temperature, the adjusting module is specifically configured to: acquiring a first difference temperature between the indoor unit evaporation temperature and the indoor unit target evaporation temperature; if the first difference temperature is higher than a preset first difference temperature threshold, controlling the opening of the first regulating valve to increase by a set opening, wherein the first difference temperature threshold is higher than zero; if the first difference temperature is lower than the negative of the first difference temperature threshold, controlling the opening degree of the first regulating valve to reduce the set opening degree; and if the first difference temperature is not lower than the negative number of the first difference temperature threshold and not higher than the first difference temperature threshold, controlling the first regulating valve to keep the current opening.
According to an embodiment of the present invention, the control device of an air conditioner further includes: the first acquisition module is used for acquiring the inlet temperature of the indoor unit evaporator and the middle temperature of the indoor unit evaporator and taking the smaller value of the inlet temperature of the indoor unit evaporator and the middle temperature of the indoor unit evaporator as the indoor unit evaporation temperature.
According to one embodiment of the invention, the initial opening of the first regulating valve is a preset maximum opening.
According to an embodiment of the present invention, the control device of an air conditioner further includes: the second acquisition module is used for taking the target evaporation temperature of the air conditioner system as an initial value of the target evaporation temperature of the indoor unit and acquiring the return air temperature, the set temperature, the indoor humidity and the set humidity of the indoor unit; the adjusting module is further used for adjusting the target evaporating temperature of the indoor unit according to the return air temperature of the indoor unit, the set temperature, the indoor humidity and the set humidity.
According to an embodiment of the present invention, when the adjusting module adjusts the target evaporating temperature of the indoor unit according to the indoor unit return air temperature, the set temperature, the indoor humidity, and the set humidity, the adjusting module is specifically configured to: acquiring a second difference temperature between the return air temperature of the indoor unit and the set temperature; acquiring the difference humidity between the indoor humidity and the set humidity; if the second difference temperature is higher than a preset second difference temperature threshold value and the duration time exceeds a preset first time threshold value and the target evaporation temperature of the indoor unit is higher than the target evaporation temperature of the air conditioner system, controlling the target evaporation temperature of the indoor unit to reduce a set value, wherein the second difference temperature threshold value is higher than zero; if the second difference temperature is not higher than the second difference temperature threshold, the difference humidity is higher than a preset first relative humidity threshold, and the target evaporation temperature of the indoor unit is higher than the target evaporation temperature of the air conditioner system, controlling the target evaporation temperature of the indoor unit to reduce the set value, and the first relative humidity threshold is higher than zero; and if the second difference temperature is not higher than the second difference temperature threshold and the difference humidity is not higher than the first relative humidity threshold, controlling the target evaporation temperature of the indoor unit to increase by the set value.
According to an embodiment of the present invention, when the adjusting module controls the target evaporation temperature of the indoor unit to increase by the set value, the adjusting module is specifically configured to: and if the difference humidity is lower than a preset second relative humidity threshold, controlling the target evaporation temperature of the indoor unit to increase by the set value, wherein the second relative humidity threshold is higher than zero.
According to an embodiment of the present invention, when controlling the target evaporation temperature of the indoor unit to increase by the set value, the adjusting module is further configured to: and if the difference humidity is not lower than the second relative humidity threshold, the air conditioner reaches a temperature standby state, and the time of the temperature standby state of the air conditioner is shorter than a preset second time threshold, controlling the target evaporation temperature of the indoor unit to increase the set value.
To achieve the above object, an embodiment of a third aspect of the present invention provides an air conditioner, including: the control device of the air conditioner is provided.
According to the air conditioner provided by the embodiment of the invention, through the control device of the air conditioner, the adjustable first adjusting valve is adjusted, so that the evaporation temperature of the indoor unit can be independently adjusted, and the indoor comfort level is improved.
To achieve the above object, a fourth aspect of the present invention provides an electronic device, including: the air conditioner control method comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the control method of the air conditioner is realized.
According to the electronic equipment provided by the embodiment of the invention, the independent adjustment of the evaporating temperature of the indoor unit can be realized by executing the control method of the air conditioner, so that the indoor comfort level is improved.
To achieve the above object, a fifth embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, the program, when executed by a processor, implementing the control method of the air conditioner.
According to the computer readable storage medium of the embodiment of the invention, by executing the control method of the air conditioner, the independent adjustment of the evaporating temperature of the indoor unit can be realized, so that the indoor comfort level is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
FIG. 3 is a logic diagram for determining a target evaporating temperature of an indoor unit according to an embodiment of the present invention;
fig. 4 is a block schematic diagram of a control apparatus of an air conditioner according to an embodiment of the present invention;
fig. 5 is a block diagram schematically illustrating a control apparatus of an air conditioner according to an embodiment of the present invention;
FIG. 6 is a block schematic diagram of an air conditioner according to an embodiment of the present invention;
FIG. 7 is a block schematic diagram of an electronic device according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
A control method of an air conditioner, a control device of an air conditioner, and an air conditioner having the control device according to embodiments of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a schematic view of an air conditioner according to an embodiment of the present invention.
As shown in fig. 1, the air conditioner of the present invention may include: the outdoor unit 1, the indoor units 2 and the refrigerant distribution device 3, wherein the outdoor unit 1 and the indoor units 2 can be in one-to-one correspondence, that is, one outdoor unit corresponds to one indoor unit, and the indoor units 1 and the outdoor unit 2 can be in one-to-many correspondence, that is, one outdoor unit corresponds to a plurality of indoor units; the indoor units and the distribution devices are in a one-to-one correspondence relationship, and fig. 1 illustrates an example in which one outdoor unit corresponds to two indoor units.
The refrigerant distribution device consists of a first regulating valve EVB-A arranged on the low-pressure air pipe, a second regulating valve EVB-B arranged on the high-pressure air pipe and a third regulating valve EVB-C arranged on the liquid pipe. The first regulating valve is an adjustable valve body and is used for regulating the flow of the refrigerant flowing into the indoor unit.
And in the running process of the air conditioner, opening and closing control is carried out on the first regulating valve and the second regulating valve, wherein when the first regulating valve is opened, the second regulating valve is closed, and when the first regulating valve is closed, the second regulating valve is opened, so that the switching between a cooling mode and a heating mode of the air conditioner is realized.
When the air conditioner operates in a heating mode, high-temperature and high-pressure gaseous refrigerant from the outdoor unit enters the indoor unit through the high-pressure air pipe and the second regulating valve, at the moment, the second regulating valve is opened, and the first regulating valve is closed; when the air conditioner operates in a refrigeration mode, low-temperature and low-pressure gaseous refrigerant from the outdoor unit enters the indoor unit through the low-pressure air pipe and the first regulating valve, and at the moment, the first regulating valve is opened, and the second regulating valve is closed.
Fig. 2 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention.
As shown in fig. 2, the control method of an air conditioner according to an embodiment of the present invention may include the steps of:
and S1, the air conditioner is in a refrigeration mode, and the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit are obtained.
And S2, adjusting the opening of the first adjusting valve according to the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit.
Specifically, the air conditioner shown in fig. 1 will be described as an example. And when the air conditioner is in the running process, the target evaporation temperature and the indoor unit evaporation temperature corresponding to each indoor unit are obtained in real time, and the opening of the first regulating valve is regulated according to the target evaporation temperature and the indoor unit evaporation temperature of each indoor unit. For example, when the indoor unit evaporation temperature corresponding to the first indoor unit is lower than the indoor unit target evaporation temperature, the opening degree of the first regulating valve EVB-a1 can be subjected to turn-down control to reduce the refrigerant flow flowing into the indoor unit and increase the evaporation temperature of the first indoor unit; for another example, when the indoor unit evaporation temperature corresponding to the second indoor unit is greater than the indoor unit target evaporation temperature, the opening of the first adjustment valve EVB-a2 may be controlled to increase the refrigerant flow rate flowing into the indoor unit, thereby decreasing the evaporation temperature of the second indoor unit.
Therefore, according to the control method disclosed by the invention, independent adjustment of the evaporation temperature can be realized according to the evaporation temperature of each indoor unit and the target evaporation temperature of the indoor unit, so that the evaporation temperature can meet the requirements of all indoor units, the problems that the evaporation temperature of an air conditioner needs to be set at a lower temperature due to the fact that the requirement of the indoor unit with the maximum load is met during refrigeration, frequent starting and stopping and excessive dehumidification are caused to indoor units with small loads, and therefore, the temperature fluctuation is large, the air is dry, and the body feeling is poor are solved.
According to one embodiment of the invention, the adjusting the opening degree of the first adjusting valve according to the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit comprises the following steps: acquiring a first difference temperature between the indoor unit evaporation temperature and the indoor unit target evaporation temperature; if the first difference temperature is higher than a preset first difference temperature threshold, controlling the opening of the first regulating valve to increase the set opening, wherein the first difference temperature threshold is higher than zero; if the first difference temperature is lower than the negative of the first difference temperature threshold, controlling the opening of the first regulating valve to reduce the set opening; and controlling the first regulating valve to keep the current opening degree if the first difference temperature is not lower than the negative number of the first difference temperature threshold and not higher than the first difference temperature threshold. The preset first difference temperature threshold and the set opening degree may be calibrated according to an actual situation, for example, the preset first difference temperature threshold may be 0.5 ℃.
Specifically, a difference value between the evaporating temperature of the indoor unit and the target evaporating temperature of the indoor unit is obtained and recorded as a first difference temperature, and the first difference temperature is judged, wherein when the first temperature difference value is larger than a preset first difference temperature threshold (such as 0.5 ℃), the opening of the first regulating valve is controlled to be increased by a preset opening (for example, the preset opening is p 1); when the first difference temperature is smaller than the negative number (e.g., -0.5 ℃) of the first difference temperature threshold, controlling the opening of the first regulating valve to be smaller than a preset opening (e.g., the preset opening is p1 steps); and when the first difference temperature is greater than or equal to the negative of the first difference temperature threshold and less than or equal to the first difference temperature threshold, controlling the first regulating valve to keep the current opening.
In one embodiment of the present invention, the initial opening degree of the first regulating valve is a preset maximum opening degree. That is, when the air conditioner is started, in order to ensure the cooling capacity, the initial opening degree of the first regulating valve is the maximum opening degree allowed by the first regulating valve.
According to an embodiment of the present invention, the control method of the air conditioner further includes: acquiring the inlet temperature of an indoor unit evaporator and the middle temperature of the indoor unit evaporator; and taking the smaller value of the inlet temperature of the indoor unit evaporator and the middle temperature of the indoor unit evaporator as the indoor unit evaporation temperature. The inlet temperature T2A of the indoor unit evaporator can be obtained by a temperature sensor arranged at the inlet of the indoor unit evaporator, and the middle temperature T2 of the indoor unit evaporator can be obtained by a temperature sensor arranged at the middle of the indoor unit evaporator.
That is to say, in order to meet the requirement of the indoor unit with the maximum load, the smaller temperature value of the inlet temperature T2A of the evaporator of the indoor unit and the middle temperature T2 of the evaporator of the indoor unit is taken as the evaporation temperature of the indoor unit, and then the adjusting logic of the adjustable valve body EBV-a on the low-pressure air pipe is as follows: and adjusting according to the difference between min (T2, T2A) of the indoor unit and the target evaporation temperature Tes _ inor of the indoor unit, when min (T2, T2A) < Tes _ inor, controlling the step number of the EBV-A to be smaller by p1 steps so as to improve the evaporation temperature of the indoor unit, and when min (T2, T2A) ≥ Tes _ inor, controlling the step number of the EBV-A to be larger by p1 steps so as to reduce the evaporation temperature of the indoor unit.
According to an embodiment of the present invention, the method for controlling an air conditioner further includes: taking the target evaporation temperature of the air conditioner system as an initial value of the target evaporation temperature of the indoor unit; acquiring the return air temperature, the set temperature, the indoor humidity and the set humidity of the indoor unit; and adjusting the target evaporation temperature of the indoor unit according to the return air temperature, the set temperature, the indoor humidity and the set humidity of the indoor unit. The indoor unit return air temperature T1 can be obtained by a temperature sensor arranged at the indoor unit return air inlet, and the indoor humidity Td can be obtained by a temperature and humidity sensor (or a humidity sensor) arranged on the indoor unit side.
Further, according to an embodiment of the present invention, the adjusting of the target evaporating temperature of the indoor unit according to the return air temperature, the set temperature, the indoor humidity and the set humidity of the indoor unit includes: acquiring a second difference temperature between the return air temperature of the indoor unit and the set temperature; acquiring the difference humidity between the indoor humidity and the set humidity; if the second difference temperature is higher than a preset second difference temperature threshold value, the duration time exceeds a preset first time threshold value, and the target evaporation temperature of the indoor unit is higher than the target evaporation temperature of the air conditioner system, controlling the target evaporation temperature of the indoor unit to reduce a set value, wherein the second difference temperature threshold value is higher than zero; the second difference temperature is not higher than a second difference temperature threshold, the difference humidity is higher than a preset first relative humidity threshold, the target evaporation temperature of the indoor unit is higher than the target evaporation temperature of the air conditioner system, the target evaporation temperature of the indoor unit is controlled to be reduced by a set value, and the first relative humidity threshold is higher than zero; and if the second difference temperature is not higher than the second difference temperature threshold and the difference humidity is not higher than the first relative humidity threshold, controlling the target evaporation temperature of the indoor unit to increase by a set value. The second difference temperature threshold, the preset first time threshold, the first relative humidity threshold, and the set value may be calibrated according to actual conditions, for example, the value range of the second difference temperature threshold may be [1 ℃, 3 ℃ ], for example, the second difference temperature threshold may be 2 ℃, the preset first time threshold may be 30min, the value range of the first relative humidity threshold may be [ 5%, 15% ], and the set value may be 1 ℃.
Specifically, as shown in fig. 3, when the air conditioner starts the cooling operation, the air conditioner system target evaporation temperature is set as the initial value of the indoor unit target evaporation temperature. And detecting the temperature difference between the return air temperature T1 of the indoor unit and the set temperature Ts, recording as a second difference temperature, and if T1-Ts is greater than a preset second difference temperature threshold delta T1 (such as 2 ℃), preferentially ensuring the refrigeration effect, keeping the opening degree of the first regulating valve at the maximum opening degree, and keeping the evaporation temperature of the indoor unit consistent with the evaporation temperature of the air conditioner system. And when T1-Ts is more than delta T1, the duration exceeds a preset first time threshold (such as 30min), and the target evaporation temperature Tes _ indor of the indoor unit is more than the target evaporation temperature Tes of the air conditioner system, controlling the target evaporation temperature of the indoor unit to be reduced by a set value (such as 1 ℃ C.).
When T1-Ts is not more than delta T1, dehumidification control is started, the relation between the difference humidity of the indoor humidity Td and the set humidity Tds is judged, when Td-Tds is more than a first relative humidity threshold delta T2, dehumidification is considered to be insufficient, at the moment, if Tes _ inor is more than Tes, the target evaporation temperature of the indoor unit is controlled to be reduced by a set value (for example, the target evaporation temperature is reduced by 1 ℃), and otherwise, the temperature difference between the indoor unit return air temperature T1 and the set temperature Ts is judged again and subsequent control logic is executed. And when the T1-Ts is not less than delta T1 and the Td-Tds is not less than delta T2 (such as-3), transitional dehumidification is considered, the target evaporation temperature of the indoor unit is controlled to be increased by a set value (such as 1 ℃) so as to reduce the dehumidification amount.
Further, according to an embodiment of the present invention, the controlling the indoor unit target evaporating temperature increase setting value includes: and if the difference humidity is lower than a preset second relative humidity threshold value, controlling the target evaporation temperature of the indoor unit to increase by a set value, wherein the preset second relative humidity threshold value is higher than zero. The second relative humidity threshold may be calibrated according to actual conditions, for example, the value range of the second relative humidity threshold may be [ -10%, 5% ].
According to an embodiment of the present invention, the controlling the target evaporating temperature increasing setting value of the indoor unit further comprises: and if the difference humidity is not lower than the second relative humidity threshold, the air conditioner reaches a temperature standby state, and the time of the temperature standby state of the air conditioner is shorter than a preset second time threshold, controlling the target evaporation temperature of the indoor unit to increase a set value. The second time threshold may be calibrated according to actual conditions, for example, the second time threshold may be 10 min.
The warm standby means: and entering a standby state after the set temperature is reached.
Specifically, as shown in fig. 3, when the target indoor unit evaporation temperature increase setting value is controlled (i.e. the conditions are satisfied, T1-Ts is not less than Δ T1, and Td-Tds is not less than Δ T2), the magnitude relationship between the difference humidity and the preset second relative humidity threshold is also determined, and when Td-Tds is less than the preset second relative humidity threshold Δ T3, the target indoor unit evaporation temperature increase setting value is controlled (e.g. increased by 1 ℃); if the air conditioner reaches the temperature shutdown when the humidity control does not reach the target value, the humidity control does not reach the set effect, at the moment, if the time interval between two temperature standby is detected to be too small, the target evaporation temperature of the indoor unit also needs to be increased, the refrigerating capacity output is reduced, namely when Td-Tds is larger than or equal to delta t3, if the air conditioner reaches the temperature shutdown, and the time of the last temperature shutdown when the temperature shutdown is reached at the time is less than a second time threshold (such as 10min), the target evaporation temperature of the indoor unit is increased by a set value (such as 1 ℃).
In summary, the control method of the invention sets the adjustable first adjusting valve on the low pressure air pipe to achieve the purpose of adjusting the evaporation temperature of the indoor unit, when the air conditioner operates in refrigeration, after the target evaporation temperature of the indoor unit meets the refrigeration requirement preferentially, the indoor target evaporation temperature is adjusted according to the indoor dehumidification requirement, when the indoor dehumidification requirement is small, the target evaporation temperature of the indoor unit is increased; and when the indoor dehumidification demand is large, the target evaporation temperature of the indoor unit is reduced. The method can realize independent adjustment of the evaporation temperature of the indoor unit, control the dehumidification capacity of the indoor unit, reduce start and stop, avoid excessive dehumidification and improve the indoor comfort level.
In summary, according to the control method of the air conditioner in the embodiment of the present invention, when the air conditioner is in the cooling mode, the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit are obtained, and the opening of the first adjusting valve is adjusted according to the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit. Therefore, the method can realize independent adjustment of the evaporating temperature of the indoor unit by adjusting the adjustable first adjusting valve, thereby improving the indoor comfort level.
Fig. 4 is a block diagram schematically illustrating a control apparatus of an air conditioner according to an embodiment of the present invention.
In one embodiment of the present invention, an air conditioner includes an outdoor unit, an indoor unit, and a first regulating valve provided on a low pressure gas pipe.
As shown in fig. 4, the control apparatus of an air conditioner according to an embodiment of the present invention may include: an acquisition module 10 and an adjustment module 20.
The obtaining module 10 is used for obtaining the target evaporating temperature of the indoor unit and the evaporating temperature of the indoor unit when the air conditioner is in a refrigeration mode. The adjusting module 20 is used for adjusting the opening of the first adjusting valve according to the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit.
According to an embodiment of the present invention, the adjusting module 20, when adjusting the opening degree of the first adjusting valve according to the indoor unit target evaporation temperature and the indoor unit evaporation temperature, is specifically configured to: acquiring a first difference temperature between the indoor unit evaporation temperature and the indoor unit target evaporation temperature; if the first difference temperature is higher than a preset first difference temperature threshold, controlling the opening of the first regulating valve to increase the set opening, wherein the first difference temperature threshold is higher than zero; if the first difference temperature is lower than the negative number of the first difference temperature threshold, controlling the opening of the first regulating valve to reduce the set opening; and if the first difference temperature is not lower than the negative number of the first difference temperature threshold and not higher than the first difference temperature threshold, controlling the first regulating valve to keep the current opening.
According to an embodiment of the present invention, as shown in fig. 5, the control device of an air conditioner further includes: the first obtaining module 30 is configured to obtain an inlet temperature of an indoor unit evaporator and a middle temperature of the indoor unit evaporator, and use a smaller value of the inlet temperature of the indoor unit evaporator and the middle temperature of the indoor unit evaporator as an indoor unit evaporation temperature.
According to one embodiment of the present invention, the initial opening degree of the first regulating valve is a preset maximum opening degree.
According to an embodiment of the present invention, as shown in fig. 5, the control device of an air conditioner further includes: the second obtaining module 40 is configured to use the target evaporation temperature of the air conditioner system as an initial value of the target evaporation temperature of the indoor unit, and obtain an indoor unit return air temperature, a set temperature, an indoor humidity, and a set humidity; the adjusting module is also used for adjusting the target evaporating temperature of the indoor unit according to the return air temperature, the set temperature, the indoor humidity and the set humidity of the indoor unit.
According to an embodiment of the present invention, the adjusting module 10, when adjusting the target evaporating temperature of the indoor unit according to the return air temperature, the set temperature, the indoor humidity and the set humidity of the indoor unit, is specifically configured to: acquiring a second difference temperature between the air return temperature of the indoor unit and the set temperature; acquiring the difference humidity between the indoor humidity and the set humidity; if the second difference temperature is higher than a preset second difference temperature threshold value, the duration time exceeds a preset first time threshold value, and the target evaporation temperature of the indoor unit is higher than the target evaporation temperature of the air conditioner system, controlling the target evaporation temperature of the indoor unit to reduce a set value, wherein the second difference temperature threshold value is higher than zero; if the second difference temperature is not higher than the second difference temperature threshold, the difference humidity is higher than a preset first relative humidity threshold, and the target evaporation temperature of the indoor unit is higher than the target evaporation temperature of the air conditioner system, controlling the target evaporation temperature of the indoor unit to reduce a set value, and the first relative humidity threshold is higher than zero; and controlling the target evaporation temperature of the indoor unit to increase the set value if the second difference temperature is not higher than the second difference temperature threshold and the difference humidity is not higher than the first relative humidity threshold.
According to an embodiment of the present invention, the adjusting module 20, when controlling the target evaporation temperature increase set value of the indoor unit, is specifically configured to: and if the difference humidity is lower than a preset second relative humidity threshold, controlling the target evaporation temperature of the indoor unit to increase by a set value, wherein the second relative humidity threshold is higher than zero.
According to an embodiment of the present invention, the adjusting module 20, when controlling the indoor unit target evaporation temperature increase set point, is further configured to: and if the difference humidity is not lower than the second relative humidity threshold value, the air conditioner is in temperature standby, and the time of the temperature standby distance of the air conditioner at this time is less than a preset second time threshold value, controlling the target evaporation temperature of the indoor unit to be increased by a set value.
It should be noted that, please refer to the details disclosed in the control method of the air conditioner in the embodiment of the present invention, which are not disclosed in the control device of the air conditioner in the embodiment of the present invention, and detailed description thereof is omitted here.
According to the control device of the air conditioner, the air conditioner is in a refrigeration mode, the acquisition module acquires the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit, and the adjusting module adjusts the opening of the first adjusting valve according to the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit. Therefore, the device can realize independent adjustment of the evaporation temperature of the indoor unit by adjusting the adjustable first adjusting valve, so that the indoor comfort level is improved.
Fig. 6 is a block schematic diagram of an air conditioner according to an embodiment of the present invention.
As shown in fig. 6, the air conditioner 100 according to the embodiment of the present invention includes: the control device 110 of the air conditioner is described above.
According to the air conditioner provided by the embodiment of the invention, through the control device of the air conditioner, the adjustable first adjusting valve is adjusted, so that the independent adjustment of the evaporating temperature of the indoor unit can be realized, and the indoor comfort level is improved.
FIG. 7 is a block schematic diagram of an electronic device according to an embodiment of the invention.
As shown in fig. 7, the electronic device 200 of the embodiment of the present invention may include: the memory 210, the processor 220, and a computer program stored in the memory 210 and operable on the processor 220, when the processor 220 executes the program, implement the control method of the air conditioner as described above.
According to the electronic equipment provided by the embodiment of the invention, the independent regulation of the evaporation temperature of the indoor unit can be realized by executing the control method of the air conditioner, so that the indoor comfort level is improved.
In correspondence to the above-described embodiments, the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the control method of the air conditioner described above.
According to the computer readable storage medium of the embodiment of the invention, by executing the control method of the air conditioner, the independent adjustment of the evaporating temperature of the indoor unit can be realized, so that the indoor comfort level is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Further, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A control method of an air conditioner is characterized in that the air conditioner comprises an outdoor unit, an indoor unit and a first regulating valve arranged on a low-pressure air pipe, and the control method comprises the following steps:
the air conditioner is in a refrigeration mode, and a target evaporation temperature of the indoor unit and an evaporation temperature of the indoor unit are obtained;
adjusting the opening degree of the first adjusting valve according to the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit;
taking the target evaporation temperature of the air conditioner system as an initial value of the target evaporation temperature of the indoor unit;
acquiring the return air temperature, the set temperature, the indoor humidity and the set humidity of the indoor unit;
adjusting the target evaporation temperature of the indoor unit according to the return air temperature of the indoor unit, the set temperature, the indoor humidity and the set humidity, and the method comprises the following steps:
acquiring a second difference temperature between the return air temperature of the indoor unit and the set temperature;
acquiring the difference humidity between the indoor humidity and the set humidity;
if the second difference temperature is higher than a preset second difference temperature threshold value and the duration time exceeds a preset first time threshold value and the target evaporation temperature of the indoor unit is higher than the target evaporation temperature of the air conditioner system, controlling the target evaporation temperature of the indoor unit to reduce a set value, wherein the second difference temperature threshold value is higher than zero;
if the second difference temperature is not higher than the second difference temperature threshold, the difference humidity is higher than a preset first relative humidity threshold, and the target evaporation temperature of the indoor unit is higher than the target evaporation temperature of the air conditioner system, controlling the target evaporation temperature of the indoor unit to reduce the set value, and the first relative humidity threshold is higher than zero;
if the second difference temperature is not higher than the second difference temperature threshold and the difference humidity is not higher than the first relative humidity threshold, controlling the target evaporation temperature of the indoor unit to increase by the set value;
acquiring the inlet temperature of an indoor unit evaporator and the middle temperature of the indoor unit evaporator;
and taking the smaller value of the inlet temperature of the indoor unit evaporator and the middle temperature of the indoor unit evaporator as the indoor unit evaporation temperature.
2. The control method according to claim 1, wherein the adjusting the opening degree of the first regulating valve according to the indoor unit target evaporation temperature and the indoor unit evaporation temperature includes:
acquiring a first difference temperature between the indoor unit evaporation temperature and the indoor unit target evaporation temperature;
if the first difference temperature is higher than a preset first difference temperature threshold, controlling the opening of the first regulating valve to increase by a set opening, wherein the first difference temperature threshold is higher than zero;
if the first difference temperature is lower than the negative of the first difference temperature threshold, controlling the opening degree of the first regulating valve to reduce the set opening degree;
and if the first difference temperature is not lower than the negative number of the first difference temperature threshold and not higher than the first difference temperature threshold, controlling the first regulating valve to keep the current opening.
3. The control method according to claim 1, characterized in that the initial opening degree of the first regulating valve is a preset maximum opening degree.
4. The control method according to claim 1, wherein the controlling the indoor unit target evaporation temperature to increase the set value includes:
and if the difference humidity is lower than a preset second relative humidity threshold, controlling the target evaporation temperature of the indoor unit to increase by the set value, wherein the second relative humidity threshold is higher than zero.
5. The control method according to claim 4, wherein the controlling the indoor unit target evaporation temperature to increase the set value further comprises:
and if the difference humidity is not lower than the second relative humidity threshold, the air conditioner is in temperature standby, and the time of the temperature standby distance of the air conditioner at this time is less than a preset second time threshold, controlling the target evaporation temperature of the indoor unit to increase the set value.
6. A control device of an air conditioner, the air conditioner comprising an outdoor unit, an indoor unit and a first regulating valve disposed on a low-pressure air pipe, the control device comprising:
the acquisition module is used for acquiring the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit when the air conditioner is in a refrigeration mode, and acquiring the return air temperature, the set temperature, the indoor humidity and the set humidity of the indoor unit; acquiring a second difference temperature between the return air temperature of the indoor unit and the set temperature; acquiring the difference humidity between the indoor humidity and the set humidity;
the first acquisition module is used for acquiring the inlet temperature of the indoor unit evaporator and the middle temperature of the indoor unit evaporator and taking the smaller value of the inlet temperature of the indoor unit evaporator and the middle temperature of the indoor unit evaporator as the indoor unit evaporation temperature;
the adjusting module is used for adjusting the opening of the first adjusting valve according to the target evaporation temperature of the indoor unit and the evaporation temperature of the indoor unit; taking the target evaporation temperature of the air conditioner system as an initial value of the target evaporation temperature of the indoor unit; if the second difference temperature is higher than a preset second difference temperature threshold value and the duration time exceeds a preset first time threshold value and the target evaporation temperature of the indoor unit is higher than the target evaporation temperature of the air conditioner system, controlling the target evaporation temperature of the indoor unit to reduce a set value, wherein the second difference temperature threshold value is higher than zero; if the second difference temperature is not higher than the second difference temperature threshold, the difference humidity is higher than a preset first relative humidity threshold, and the target evaporation temperature of the indoor unit is higher than the target evaporation temperature of the air conditioner system, controlling the target evaporation temperature of the indoor unit to reduce the set value, and the first relative humidity threshold is higher than zero; and if the second difference temperature is not higher than the second difference temperature threshold and the difference humidity is not higher than the first relative humidity threshold, controlling the target evaporation temperature of the indoor unit to increase by the set value.
7. An air conditioner, comprising: the control device of an air conditioner according to claim 6.
8. An electronic device, comprising: memory, processor and computer program stored on said memory and executable on said processor, said processor implementing, when executing said program, a control method of an air conditioner according to any one of claims 1-5.
9. A computer-readable storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, implements the control method of an air conditioner according to any one of claims 1 to 5.
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| CN113587382B (en) * | 2021-07-07 | 2022-12-20 | 青岛海信日立空调系统有限公司 | Control method and device of air conditioner |
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