CN112212457A - Air conditioner control method and device, storage medium and air conditioner - Google Patents
Air conditioner control method and device, storage medium and air conditioner Download PDFInfo
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- CN112212457A CN112212457A CN202010948217.0A CN202010948217A CN112212457A CN 112212457 A CN112212457 A CN 112212457A CN 202010948217 A CN202010948217 A CN 202010948217A CN 112212457 A CN112212457 A CN 112212457A
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- 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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump 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
- 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
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner control method, an air conditioner control device, a storage medium and an air conditioner, wherein the method comprises the following steps: detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals or not; and when the change rate is detected to be in any one of the at least two rate intervals, adjusting the operation of the air conditioner according to the rate interval in which the change rate is positioned. The scheme provided by the invention can reduce the occurrence frequency of reliability protection.
Description
Technical Field
The invention relates to the field of control, in particular to an air conditioner control method and device, a storage medium and an air conditioner.
Background
The frequency conversion air conditioner has quicker and more sensitive reaction to the room temperature and the environment working condition after detection and perception than the fixed frequency air conditioner, and the use safety and reliability are more important. In order to improve the use reliability of the variable frequency air conditioner, the diversification of a user group and the uncertainty of multiple conditions of the user use are considered, and the reliability safety problems which may occur regardless of the probability magnitude need to be verified, so that the consumption safety of consumers can be ensured. At present, in the field of variable frequency air conditioners, the phenomenon of unqualified overload protection often occurs when the air volume suddenly changes or the special air supply air conditioners distributed up and down are under the special load working conditions of high-load heating and the like, and the service performance of the air conditioners and the use experience of users are seriously influenced.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art and provides an air conditioner control method, an air conditioner control device, a storage medium and an air conditioner so as to solve the problem that the air conditioner in the prior art is often unqualified in overload protection under a special load working condition.
One aspect of the present invention provides an air conditioner control method, including: detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals or not; and when the change rate is detected to be in any one of the at least two rate intervals, adjusting the operation of the air conditioner according to the rate interval in which the change rate is positioned.
Optionally, the method further comprises: before detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals, detecting whether the change rate of the wind speed of the indoor fan reaches a preset threshold value; and when detecting that the change rate of the wind speed of the indoor fan reaches the preset threshold value, detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals.
Optionally, the at least two rate intervals include: a first rate section and a second rate section, wherein a lower limit value of the first rate section is greater than or equal to an upper limit value of the second rate section; adjusting the operation of the air conditioner according to the rate interval where the change rate is located, wherein the operation comprises the following steps: when the change rate is in the first rate interval, parallel simultaneous adjustment is carried out on the compressor frequency, the opening of the electronic expansion valve and the outdoor fan wind speed; and when the change rate is in the second rate interval, progressively adjusting the frequency of the compressor, the opening of the electronic expansion valve and the air speed of the outdoor fan in sequence.
Optionally, when the change rate is in the first rate interval, performing parallel simultaneous adjustment on the compressor frequency, the opening of the electronic expansion valve, and the outdoor fan wind speed includes: when the temperature of the indoor heat exchanger changes along with the temperature rise, the running frequency of a compressor is reduced, the opening of an electronic expansion valve is increased, and the air speed of an outdoor fan is reduced; when the change rate is in the second rate interval, the compressor frequency, the opening of the electronic expansion valve and the air speed of the outdoor fan are progressively adjusted in sequence, and the method comprises the following steps: when the temperature of the indoor heat exchanger changes along with the temperature rise, the running frequency of the compressor is reduced; after the running frequency of the compressor is reduced, if the change rate is still in the second rate interval, the opening degree of the electronic expansion valve is increased; and after the opening of the electronic expansion valve is increased, if the change rate is still in the second rate interval, reducing the wind speed of the outdoor fan.
Another aspect of the present invention provides an air conditioning control apparatus, including: the temperature detection unit is used for detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals; and the adjusting control unit is used for adjusting the operation of the air conditioner according to the speed interval where the change rate is located when the detection unit detects that the change rate is located in any one of the at least two speed intervals.
Optionally, the method further comprises: the air speed detection unit is used for detecting whether the change rate of the air speed of the indoor fan reaches a preset threshold value before the temperature detection unit detects whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals; the temperature detection unit is further configured to: and when the wind speed detection unit detects that the change rate of the wind speed of the indoor fan reaches the preset threshold value, detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals.
Optionally, the at least two rate intervals include: a first rate section and a second rate section, wherein a lower limit value of the first rate section is greater than or equal to an upper limit value of the second rate section; the adjusting control unit adjusts the operation of the air conditioner according to the speed interval where the change speed is located, and comprises the following steps: when the change rate is in the first rate interval, parallel simultaneous adjustment is carried out on the compressor frequency, the opening of the electronic expansion valve and the outdoor fan wind speed; and when the change rate is in the second rate interval, progressively adjusting the frequency of the compressor, the opening of the electronic expansion valve and the air speed of the outdoor fan in sequence.
Optionally, when the change rate is in the first rate interval, the adjustment control unit simultaneously adjusts the compressor frequency, the opening of the electronic expansion valve, and the outdoor fan wind speed in parallel, and includes: when the temperature of the indoor heat exchanger changes along with the temperature rise, the running frequency of a compressor is reduced, the opening of an electronic expansion valve is increased, and the air speed of an outdoor fan is reduced; when the change rate is in the second rate interval, the adjustment control unit progressively adjusts the frequency of the compressor, the opening of the electronic expansion valve and the wind speed of the outdoor fan, and the adjustment control unit comprises: when the temperature of the indoor heat exchanger changes along with the temperature rise, the running frequency of the compressor is reduced; after the running frequency of the compressor is reduced, if the change rate is still in the second rate interval, the opening degree of the electronic expansion valve is increased; and after the opening of the electronic expansion valve is increased, if the change rate is still in the second rate interval, reducing the wind speed of the outdoor fan.
A further aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods described above.
Yet another aspect of the present invention provides an air conditioner comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, wherein the processor implements the steps of any of the methods described above when executing the program.
In another aspect, the invention provides an air conditioner, which comprises the air conditioner control device.
According to the technical scheme of the invention, according to whether the change rate of the temperature of the indoor heat exchanger is in a sudden change or rapid change state or not, when the sudden change or rapid change state is detected, the operation of the air conditioner is adjusted according to the state of the change rate of the temperature of the indoor heat exchanger, the load change caused by the working condition can be self-adapted, the frequency of occurrence of reliability protection is reduced, the compressor frequency, the opening of the electronic expansion valve and the air speed of the outdoor fan are simultaneously adjusted in a parallel manner or sequentially adjusted in a progressive manner according to whether the change rate of the temperature of the indoor heat exchanger is in the sudden change or rapid change state, and particularly for an up-down distributed special air supply mode, the temperature and the pressure of an internal system of the air conditioner can adapt to the change. Under the special load working condition, when different air doors are opened and closed, the whole air conditioner system can be adjusted and corrected in response to the load change in operation, so that even if the extreme severe working condition occurs, the internal system of the air conditioner can also be self-adapted to the load change caused by the working condition through logic adjustment, the occurrence frequency of reliability protection is reduced, the reliable operation stability of the air conditioner is improved, and the use satisfaction of users is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of an embodiment of an air conditioner control method according to the present invention;
FIG. 2a is a frequency control curve for a compressor according to an embodiment of the present invention;
FIG. 2b is a compressor frequency control curve according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of a control logic for determining that the temperature variation speed of the heat exchanger belongs to a sudden change state (a first speed interval);
FIG. 4 is a schematic diagram of a control logic for determining a temperature variation rate of a heat exchanger in a rapid sudden change state (a second rate interval);
fig. 5 is a block diagram of an embodiment of an air conditioning control apparatus according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
At present, an up-down distributed special air supply air conditioner (two or more air outlets) can often have the phenomenon of unqualified overload protection under special load working conditions such as high-load heating and the like. For example, when the upper and lower air outlet distributed air conditioner runs at full load under a high load condition, a user performs air turning gear adjustment when using the air conditioner, and simultaneously, the lower air door is closed unintentionally (any air outlet mode is closed or weakened to cause sudden change of air volume), the air damper reduces and synchronously closes the air inlet, the first influence is that the air volume is reduced sharply, huge heat inside the indoor unit cannot be exchanged and released through the air outlet at the moment, the system cannot react quickly and acts, the temperature of the pipe rises sharply to be protected, and at the moment, heat input needs to be slowed down and heat discharge and exchange needs to be accelerated.
The invention provides an air conditioner control method. The method is particularly suitable for air conditioners with two or more air outlets, such as an up-and-down distributed air supply air conditioner. Fig. 1 is a schematic method diagram of an embodiment of an air conditioner control method provided by the present invention.
As shown in fig. 1, according to an embodiment of the present invention, the control method includes at least step S120 and step S130.
Step S120, detecting whether the change rate of the indoor heat exchanger temperature is in any one of at least two preset rate intervals.
And step S130, when the change rate is detected to be in any one of the at least two rate intervals, adjusting the operation of the air conditioner according to the rate interval in which the change rate is located.
The temperature of the indoor heat exchanger can be specifically the temperature of a heat exchange tube of the indoor heat exchanger. In one embodiment, the at least two rate intervals comprise: a first rate interval and a second rate interval. Wherein a lower limit value of the first rate section is greater than or equal to an upper limit value of the second rate section. When the change speed of the temperature of the indoor heat exchanger (such as the temperature of an indoor heat exchange tube) is in the first speed interval, the change speed of the temperature of the indoor heat exchanger belongs to a rapid sudden change state, and when the change speed is in the second speed interval, the change speed of the temperature of the indoor heat exchanger belongs to a rapid sudden change state.
For example, the first rate interval is: the temperature change delta T of every 30s of the heat exchange tube is between 3 and 5 ℃, and can be defined as a sudden mutation state; the second rate interval is: the temperature change delta T of every 30s of the heat exchange tube is between 1 and 3 ℃, and the rapid mutation state can be defined. The rate intervals of the temperature change rates of the indoor heat exchangers of different systems of different machine types can be the same or different.
As shown in fig. 1, according to a preferred embodiment of the present invention, the control method further includes a step S110.
And step S110, detecting whether the change rate of the wind speed of the indoor fan reaches a preset threshold value.
Specifically, before detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals, detecting whether the change rate of the wind speed of the indoor fan reaches a preset threshold value; and when the change rate of the wind speed of the indoor fan reaches the preset threshold value, detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals.
That is, firstly, the wind speed of the indoor fan is detected, and whether the wind speed of the indoor fan changes suddenly or not, that is, whether the change rate of the wind speed of the indoor fan reaches a preset threshold value or not is determined. And detecting the sudden change of the wind speed of the indoor room, and indirectly judging the sudden change of the wind output through the sudden change of the wind speed, so as to detect the temperature of the indoor heat exchanger.
When the change rate is in the first rate interval (a sudden change state), the compressor frequency, the opening of the electronic expansion valve and the outdoor fan wind speed are adjusted in parallel; and when the change rate is in the second rate interval (a rapid mutation state), progressively adjusting the frequency of the compressor, the opening of the electronic expansion valve and the air speed of the outdoor fan in sequence.
Based on the principle of heat exchange quantity, heat exchange coefficient, heat exchange temperature difference and heat exchange area, when the change speed of the heat exchanger temperature is judged to be in a sudden change state, a parallel action command is executed, and meanwhile, the frequency of a compressor, the opening degree of an electronic expansion valve and the wind speed (such as a gear) of an outdoor fan are adjusted and controlled. And adjusting and controlling the frequency of the compressor, the opening of the electronic expansion valve and the wind speed of the external fan according to the variation trend of the temperature of the indoor heat exchanger. When the temperature of the indoor heat exchanger changes along with the temperature rise, the running frequency of a compressor is reduced, the opening of an electronic expansion valve is increased, and the air speed of an outdoor fan is reduced; when the temperature of the indoor heat exchanger changes along the trend of temperature reduction, the running frequency of the compressor is increased, the opening degree of the electronic expansion valve is reduced, and the air speed of the outdoor fan is increased. Optionally, when the temperature of the indoor heat exchanger changes in a trend of temperature decrease, the indoor heat exchanger has a corresponding protection function and the reaction speed of the indoor heat exchanger is within reach, and reliable protection affecting the safety of a user does not occur, so that adjustment is not needed.
When the temperature of the heat exchange tube suddenly changes, the pressure of the whole system rises rapidly, and the high pressure rises to generate dynamic high-pressure impact on the inner wall of the heat exchange tube, the high-pressure heat tube, a compressor cavity and the like, so that the reliability and the service life of heat exchange parts are directly influenced, and the reliability of the whole system is further influenced. The pressure needs to be quickly reduced by controlling and adjusting, the temperature of the heat exchange tube is quickly reduced, and two ways are mainly adopted: (1) the heat generation of the whole system and the heat input of the internal machine are reduced (namely, the refrigerant carrying high temperature and high heat flows into the internal machine for heat exchange); (2) the heat exchange and the discharge of the inner machine evaporator are accelerated.
The running frequency of the compressor is reduced (for example, 2Hz-8Hz is reduced), the compressor can be reduced to compress the refrigerant into high-temperature and high-pressure gaseous refrigerant by applying work, the input of high-temperature and high-pressure gas is reduced, namely the heat input into the inner machine is reduced, the temperature of the inner machine pipe is directly reduced, the pressure of the whole heat pipe is reduced, and the reliability is enhanced; the opening of the electronic expansion valve is adjusted, so that the flow of a refrigerant is adjusted, the opening of the electronic expansion valve is increased, the circulation amount of the refrigerant is increased, the exhaust temperature can be reduced, the throttling effect is reduced, and the pressure and the temperature are directly reduced. The gear of the external fan is adjusted, the rotating speed of the outdoor fan is reduced, the heat exchange between the heat exchanger of the outdoor unit and air can be directly reduced due to the lower rotating speed of the external fan, and the heat generation of the whole machine is reduced.
When the change speed of the temperature of the heat exchanger is judged to be in a rapid mutation state, a progressive action command is executed, and the frequency of the compressor, the opening of the electronic expansion valve and the wind speed (gear) of the external fan are adjusted and controlled in sequence. When the temperature of the indoor heat exchanger changes in a trend of temperature rise, firstly reducing the running frequency of the compressor; after the running frequency of the compressor is reduced, if the change rate is still in the second rate interval, the opening degree of the electronic expansion valve is increased; and after the opening of the electronic expansion valve is increased, if the change rate is still in the second rate interval, reducing the wind speed of the outdoor fan (reducing the gear of the outer fan). When the temperature of the indoor heat exchanger changes in a trend of temperature reduction, the frequency of the compressor is firstly increased, after the operating frequency of the compressor is increased, if the change rate is still in the second rate interval, the opening degree of the electronic expansion valve is reduced, and after the opening degree of the electronic expansion valve is reduced, if the change rate is still in the second rate interval, the rotating speed of the outer fan is increased (the gear of the fan is increased).
For example, when the temperature of the heat exchange tube of the heat exchanger is judged to be in a rapid mutation state, the frequency of the compressor is adjusted and controlled firstly, so that the operating frequency of the compressor is increased in an amplitude preset mode or the operating frequency of the compressor is decreased in an amplitude preset mode, the temperature of the heat exchange tube of the heat exchanger and the system pressure are matched with an actual system rapidly, and otherwise, the existing operating state of the air conditioner is maintained. And after the execution is finished, judging that the change speed of the temperature of the heat exchanger belongs to a quick mutation state (in a first speed interval), if so, executing the opening degree regulation control of the electronic expansion valve, and otherwise, maintaining the existing operation state. And after the execution is finished, continuously judging that the change speed of the temperature of the heat exchange tube belongs to a quick mutation state, if so, executing gear adjustment control of an outer fan, and otherwise, maintaining the existing running state.
In the above embodiment of the present invention, when adjusting the compressor frequency, the schematic adjustment diagram of the compressor frequency can be referred to as shown in fig. 2a and fig. 2 b. Fig. 2a and 2b show the frequency control curves of the compressor under different working conditions, and the curves show the rising or falling trend as a whole.
Fig. 3 and 4 also show that fig. 3 is a schematic control logic diagram when the change speed of the temperature of the heat exchanger is determined to be in a sudden change state (a first speed interval); fig. 4 is a schematic diagram of a control logic for determining that the change speed of the temperature of the heat exchanger belongs to a rapid sudden change state (second speed interval). As shown in fig. 3 and 4, when the sudden change of the indoor fan wind speed is detected, the heat exchanger heat exchange tube temperature is detected, when the change speed of the heat exchanger temperature is judged to be in a sudden change state (first rate section), a first parallel action command is executed, namely, the compressor frequency, the electronic expansion valve opening degree and the external fan wind speed (for example, gear) are simultaneously adjusted and controlled, and when the change speed of the heat exchanger temperature is judged to be in a rapid change state, a second progressive action command is executed, and the compressor frequency, the electronic expansion valve opening degree and the external fan wind speed (gear) are sequentially adjusted and controlled. Firstly, quickly adjusting and controlling the frequency of a compressor; then, detecting whether the change speed of the temperature of the heat collector belongs to a quick mutation state again, and if the change speed is still in the quick mutation state (a second speed interval), performing opening degree adjustment control on the electronic expansion valve; and after the opening of the electronic expansion valve is increased, detecting whether the change speed of the temperature of the heat exchanger belongs to a rapid mutation state or not, and if the change speed is still in the rapid mutation state, adjusting and controlling the gear of the outer fan to reduce the wind speed of the outdoor fan. And when judging that the temperature of the heat exchanger does not belong to quick sudden change or sudden change, maintaining the current running state of the air conditioner.
According to the technical scheme of the invention, when the wind speed is reduced, the wind volume is reduced, and the temperature rising speed of the heat exchange tube is accelerated, the corresponding execution commands are as follows: the compressor frequency reduces, and electronic expansion valve aperture increases, and outer fan rotational speed reduces or the fan gear reduces, and at the wind speed grow, the amount of wind increases, and when heat exchange tube temperature falling speed accelerated, the executive command who corresponds with it is: the frequency of the compressor is improved, the opening degree of the electronic expansion valve is reduced, the rotating speed of the external fan is increased or the gear of the fan is improved.
The invention also provides an air conditioner control device. The device is particularly suitable for air conditioners with two or more air outlets, such as an up-and-down distributed air supply air conditioner. Fig. 5 is a block diagram of an embodiment of an air conditioning control apparatus according to the present invention. As shown in fig. 5, the air conditioning control device 100 includes a temperature detection unit 120 and an adjustment control unit 130.
The temperature detection unit 120 is configured to detect whether a change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals; the adjusting and controlling unit 130 is configured to, when the detecting unit detects that the change rate is in any one of the at least two rate intervals, adjust the operation of the air conditioner according to the rate interval in which the change rate is located.
Preferably, as shown in fig. 5, the control device 100 further includes a wind speed detection unit 110. The air speed detection unit 110 is configured to detect whether a change rate of an indoor fan air speed reaches a preset threshold before the temperature detection unit 120 detects whether the change rate of the indoor heat exchanger temperature is in any one of at least two preset rate intervals; the temperature detection unit 120 is further configured to: when the wind speed detection unit 110 detects that the change rate of the wind speed of the indoor fan reaches the preset threshold value, it is detected whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals.
That is, first, the wind speed detection unit 110 detects the indoor fan wind speed, and determines whether the indoor fan wind speed changes abruptly, that is, whether the change rate of the indoor fan wind speed reaches a preset threshold value. The wind speed detection unit 110 detects that the wind speed in the indoor room changes suddenly, and the wind speed change can indirectly judge the sudden change of the wind output, so the temperature detection unit 120 detects the temperature of the indoor heat exchanger.
The temperature of the indoor heat exchanger can be specifically the temperature of a heat exchange tube of the indoor heat exchanger. In one embodiment, the at least two rate intervals comprise: a first rate interval and a second rate interval. Wherein a lower limit value of the first rate section is greater than or equal to an upper limit value of the second rate section. When the change speed of the temperature of the indoor heat exchanger (such as the temperature of an indoor heat exchange tube) is in the first speed interval, the change speed of the temperature of the indoor heat exchanger belongs to a rapid sudden change state, and when the change speed is in the second speed interval, the change speed of the temperature of the indoor heat exchanger belongs to a rapid sudden change state.
For example, the first rate interval is: the temperature change delta T of every 30s of the heat exchange tube is between 3 and 5 ℃, and can be defined as a sudden mutation state; the second rate interval is: the temperature change delta T of every 30s of the heat exchange tube is between 1 and 3 ℃, and the rapid mutation state can be defined. The rate intervals of the temperature change rates of the indoor heat exchangers of different systems of different machine types can be the same or different.
The adjusting and controlling unit 130 may specifically adjust the operation of the air conditioner according to the rate interval where the change rate is located, including: when the change rate is in the first rate interval (a sudden change state), the compressor frequency, the opening of the electronic expansion valve and the outdoor fan wind speed are adjusted in parallel; and when the change rate is in the second rate interval (a rapid mutation state), progressively adjusting the frequency of the compressor, the opening of the electronic expansion valve and the air speed of the outdoor fan in sequence.
Based on the principle of heat exchange amount (heat exchange coefficient) and heat exchange temperature difference (Φ ═ k ×. Δ T ×) and when it is determined that the change speed of the heat exchanger temperature is in the sudden change state, the adjustment control unit 130 executes a parallel operation command and performs adjustment control of the compressor frequency, the opening degree of the electronic expansion valve, and the wind speed (e.g., gear) of the external fan. Specifically, according to the temperature variation trend of the indoor heat exchanger, the frequency of the compressor, the opening of the electronic expansion valve and the wind speed of the external fan are adjusted and controlled. When the change rate is in the first rate interval, the adjustment control unit 130 performs parallel simultaneous adjustment on the compressor frequency, the opening of the electronic expansion valve, and the outdoor fan wind speed, and includes: when the temperature of the indoor heat exchanger changes along with the temperature rise, the running frequency of a compressor is reduced, the opening of an electronic expansion valve is increased, and the air speed of an outdoor fan is reduced; when the temperature of the indoor heat exchanger changes along the trend of temperature reduction, the running frequency of the compressor is increased, the opening degree of the electronic expansion valve is reduced, and the air speed of the outdoor fan is increased. Optionally, when the temperature of the indoor heat exchanger changes in a trend of temperature decrease, the indoor heat exchanger has a corresponding protection function and the reaction speed of the indoor heat exchanger is within reach, and reliable protection affecting the safety of a user does not occur, so that adjustment is not needed.
When the temperature of the heat exchange tube suddenly changes, the pressure of the whole system rises rapidly, and the high pressure rises to generate dynamic high-pressure impact on the inner wall of the heat exchange tube, the high-pressure heat tube, a compressor cavity and the like, so that the reliability and the service life of heat exchange parts are directly influenced, and the reliability of the whole system is further influenced. The pressure needs to be quickly reduced by controlling and adjusting, the temperature of the heat exchange tube is quickly reduced, and two ways are mainly adopted: (1) the heat generation of the whole system and the heat input of the internal machine are reduced (namely, the refrigerant carrying high temperature and high heat flows into the internal machine for heat exchange); (2) the heat exchange and the discharge of the inner machine evaporator are accelerated.
The running frequency of the compressor is reduced (for example, 2Hz-8Hz is reduced), the compressor can be reduced to compress the refrigerant into high-temperature and high-pressure gaseous refrigerant by applying work, the input of high-temperature and high-pressure gas is reduced, namely the heat input into the inner machine is reduced, the temperature of the inner machine pipe is directly reduced, the pressure of the whole heat pipe is reduced, and the reliability is enhanced; the opening of the electronic expansion valve is adjusted, so that the flow of a refrigerant is adjusted, the opening of the electronic expansion valve is increased, the circulation amount of the refrigerant is increased, the exhaust temperature can be reduced, the throttling effect is reduced, and the pressure and the temperature are directly reduced. The gear of the external fan is adjusted, the rotating speed of the outdoor fan is reduced, the heat exchange between the heat exchanger of the outdoor unit and air can be directly reduced due to the lower rotating speed of the external fan, and the heat generation of the whole machine is reduced.
When the change speed of the temperature of the heat exchanger is judged to be in a rapid mutation state, a progressive action command is executed, and the frequency of the compressor, the opening of the electronic expansion valve and the wind speed (gear) of the external fan are adjusted and controlled in sequence. When the change rate is in the second rate interval, the adjusting and controlling unit 130 performs progressive adjustment on the compressor frequency, the opening of the electronic expansion valve, and the outdoor fan wind speed in sequence, including: when the temperature of the indoor heat exchanger changes in a trend of temperature rise, firstly reducing the running frequency of the compressor; after the running frequency of the compressor is reduced, if the change rate is still in the second rate interval, the opening degree of the electronic expansion valve is increased; and after the opening of the electronic expansion valve is increased, if the change rate is still in the second rate interval, reducing the wind speed of the outdoor fan (reducing the gear of the outer fan). When the temperature of the indoor heat exchanger changes in a trend of temperature reduction, the frequency of the compressor is firstly increased, after the operating frequency of the compressor is increased, if the change rate is still in the second rate interval, the opening degree of the electronic expansion valve is reduced, and after the opening degree of the electronic expansion valve is reduced, if the change rate is still in the second rate interval, the rotating speed of the outer fan is increased (the gear of the fan is increased).
For example, when the temperature of the heat exchange tube of the heat exchanger is judged to be in a rapid mutation state, the frequency of the compressor is adjusted and controlled firstly, so that the operating frequency of the compressor is increased in an amplitude preset mode or the operating frequency of the compressor is decreased in an amplitude preset mode, the temperature of the heat exchange tube of the heat exchanger and the system pressure are matched with an actual system rapidly, and otherwise, the existing operating state of the air conditioner is maintained. And after the execution is finished, judging that the change speed of the temperature of the heat exchanger belongs to a quick mutation state (in a first speed interval), if so, executing the opening degree regulation control of the electronic expansion valve, and otherwise, maintaining the existing operation state. And after the execution is finished, continuously judging that the change speed of the temperature of the heat exchange tube belongs to a quick mutation state, if so, executing gear adjustment control of the outer fan, and otherwise, maintaining the existing running state.
According to the technical scheme of the invention, when the wind speed is reduced, the wind volume is reduced, and the temperature rising speed of the heat exchange tube is accelerated, the corresponding execution commands are as follows: the compressor frequency reduces, and electronic expansion valve aperture increases, and outer fan rotational speed reduces or the fan gear reduces, and at the wind speed grow, the amount of wind increases, and when heat exchange tube temperature falling speed accelerated, the executive command who corresponds with it is: the frequency of the compressor is improved, the opening degree of the electronic expansion valve is reduced, the rotating speed of the external fan is increased or the gear of the fan is improved.
The present invention also provides a storage medium corresponding to the air conditioning control method, having a computer program stored thereon, which when executed by a processor, performs the steps of any of the aforementioned methods.
The invention also provides an air conditioner corresponding to the air conditioner control method, which comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the steps of any one of the methods when executing the program.
The invention also provides an air conditioner corresponding to the air conditioner control device, which comprises the air conditioner control device.
According to the scheme provided by the invention, according to whether the change rate of the temperature of the indoor heat exchanger is in a sudden change or rapid change state or not, when the sudden change or rapid change state is detected, the operation of the air conditioner is adjusted according to the state of the change rate of the temperature of the indoor heat exchanger, the load change caused by the working condition can be self-adapted, the frequency of occurrence of reliability protection is reduced, the compressor frequency, the opening of the electronic expansion valve and the air speed of the outdoor fan are simultaneously adjusted in a parallel manner or sequentially adjusted in a progressive manner according to whether the change rate of the temperature of the indoor heat exchanger is in the sudden change or rapid change state, and particularly for an up-and-down distributed special air supply mode, the temperature and the pressure of an internal system of the air conditioner can adapt to the. Under the special load working condition, when different air doors are opened and closed, the whole air conditioner system can be adjusted and corrected in response to the load change in operation, so that even if the extreme severe working condition occurs, the internal system of the air conditioner can also be self-adapted to the load change caused by the working condition through logic adjustment, the occurrence frequency of reliability protection is reduced, the reliable operation stability of the air conditioner is improved, and the use satisfaction of users is improved.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. An air conditioner control method, comprising:
detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals or not;
and when the change rate is detected to be in any one of the at least two rate intervals, adjusting the operation of the air conditioner according to the rate interval in which the change rate is positioned.
2. The method of claim 1, further comprising:
before detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals, detecting whether the change rate of the wind speed of the indoor fan reaches a preset threshold value;
and when detecting that the change rate of the wind speed of the indoor fan reaches the preset threshold value, detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals.
3. The method of claim 1 or 2, wherein the at least two rate intervals comprise: a first rate section and a second rate section, wherein a lower limit value of the first rate section is greater than or equal to an upper limit value of the second rate section;
adjusting the operation of the air conditioner according to the rate interval where the change rate is located, wherein the operation comprises the following steps:
when the change rate is in the first rate interval, parallel simultaneous adjustment is carried out on the compressor frequency, the opening of the electronic expansion valve and the outdoor fan wind speed;
and when the change rate is in the second rate interval, progressively adjusting the frequency of the compressor, the opening of the electronic expansion valve and the air speed of the outdoor fan in sequence.
4. The method of claim 3,
when the change rate is in the first rate interval, parallel simultaneous adjustment is carried out on the compressor frequency, the opening of the electronic expansion valve and the air speed of the outdoor fan, and the parallel simultaneous adjustment comprises the following steps:
when the temperature of the indoor heat exchanger changes along with the temperature rise, the running frequency of a compressor is reduced, the opening of an electronic expansion valve is increased, and the air speed of an outdoor fan is reduced;
when the change rate is in the second rate interval, the compressor frequency, the opening of the electronic expansion valve and the air speed of the outdoor fan are progressively adjusted in sequence, and the method comprises the following steps:
when the temperature of the indoor heat exchanger changes along with the temperature rise, the running frequency of the compressor is reduced;
after the running frequency of the compressor is reduced, if the change rate is still in the second rate interval, the opening degree of the electronic expansion valve is increased;
and after the opening of the electronic expansion valve is increased, if the change rate is still in the second rate interval, reducing the wind speed of the outdoor fan.
5. An air conditioning control device, characterized by comprising:
the temperature detection unit is used for detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals;
and the adjusting control unit is used for adjusting the operation of the air conditioner according to the speed interval where the change rate is located when the detection unit detects that the change rate is located in any one of the at least two speed intervals.
6. The apparatus of claim 5, further comprising:
the air speed detection unit is used for detecting whether the change rate of the air speed of the indoor fan reaches a preset threshold value before the temperature detection unit detects whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals;
the temperature detection unit is further configured to: and when the wind speed detection unit detects that the change rate of the wind speed of the indoor fan reaches the preset threshold value, detecting whether the change rate of the temperature of the indoor heat exchanger is in any one of at least two preset rate intervals.
7. The apparatus of claim 5 or 6, wherein the at least two rate intervals comprise: a first rate section and a second rate section, wherein a lower limit value of the first rate section is greater than or equal to an upper limit value of the second rate section;
the adjusting control unit adjusts the operation of the air conditioner according to the speed interval where the change speed is located, and comprises the following steps:
when the change rate is in the first rate interval, parallel simultaneous adjustment is carried out on the compressor frequency, the opening of the electronic expansion valve and the outdoor fan wind speed;
and when the change rate is in the second rate interval, progressively adjusting the frequency of the compressor, the opening of the electronic expansion valve and the air speed of the outdoor fan in sequence.
8. The apparatus of claim 7,
when the change rate is in the first rate interval, the adjustment control unit performs parallel simultaneous adjustment on the frequency of the compressor, the opening of the electronic expansion valve and the wind speed of the outdoor fan, and the adjustment control unit comprises:
when the temperature of the indoor heat exchanger changes along with the temperature rise, the running frequency of a compressor is reduced, the opening of an electronic expansion valve is increased, and the air speed of an outdoor fan is reduced;
when the change rate is in the second rate interval, the adjustment control unit progressively adjusts the frequency of the compressor, the opening of the electronic expansion valve and the wind speed of the outdoor fan, and the adjustment control unit comprises:
when the temperature of the indoor heat exchanger changes along with the temperature rise, the running frequency of the compressor is reduced;
after the running frequency of the compressor is reduced, if the change rate is still in the second rate interval, the opening degree of the electronic expansion valve is increased;
and after the opening of the electronic expansion valve is increased, if the change rate is still in the second rate interval, reducing the wind speed of the outdoor fan.
9. A storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 4.
10. An air conditioner comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, the processor implementing the steps of the method of any one of claims 1 to 4 when executing the program, or comprising the air conditioning control apparatus of any one of claims 5 to 8.
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