CN107560106B - Method and device for controlling air conditioner and air conditioner - Google Patents

Method and device for controlling air conditioner and air conditioner Download PDF

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Publication number
CN107560106B
CN107560106B CN201710787684.8A CN201710787684A CN107560106B CN 107560106 B CN107560106 B CN 107560106B CN 201710787684 A CN201710787684 A CN 201710787684A CN 107560106 B CN107560106 B CN 107560106B
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indoor
temperature
humidity
compressor
target
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CN107560106A (en
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许文明
王飞
付裕
张立智
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Zhijia Co Ltd
Qingdao Haier Jiaozhou Air Conditioner Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
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Priority to CN201710787684.8A priority Critical patent/CN107560106B/en
Priority claimed from EP17923011.5A external-priority patent/EP3677850A4/en
Publication of CN107560106A publication Critical patent/CN107560106A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a method for controlling an air conditioner, and belongs to the technical field of air conditioners. The method comprises the following steps: acquiring indoor temperature t and indoor humidity RH in an air-conditioning refrigeration mode; and judging whether the indoor temperature t and the indoor humidity RH meet the conditions, if so, controlling the working frequency F of the compressor according to the indoor humidity RH, and adjusting the rotating speed R of the indoor fan according to the working frequency F of the compressor. The invention also discloses a device for controlling the air conditioner and the air conditioner.

Description

Method and device for controlling air conditioner and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for controlling an air conditioner and the air conditioner.
Background
The refrigerating capacity of the air conditioner is divided into sensible heat and latent heat, the sensible heat mainly affects the indoor temperature, the latent heat mainly affects the indoor humidity, and therefore both the sensible heat and the latent heat can affect the comfort level of people. How to control the indoor temperature and humidity so as to enable users to have better experience is a problem which is widely concerned at present.
The prior art discloses a time-sharing temperature and humidity separate control method for an air conditioner, which comprises the following steps: judging whether the indoor humidity is higher than the set humidity of the air conditioner; if the humidity is higher than the set humidity of the air conditioner, the air conditioner is driven to dehumidify; if the humidity is not higher than the set humidity of the air conditioner, the air conditioner is driven to refrigerate; if the humidity is higher than the set humidity of the air conditioner, the air conditioner is driven to execute dehumidification, and the method specifically comprises the following steps: if the indoor temperature is higher than the set humidity of the air conditioner, judging whether the indoor temperature is higher than the set temperature of the air conditioner; if the temperature is not higher than the set temperature of the air conditioner, the air conditioner is driven to independently dehumidify; if the indoor temperature is higher than the set temperature of the air conditioner, judging whether the indoor temperature is higher than the set temperature of the air conditioner by t1Degree; wherein t is more than or equal to 1.51Less than or equal to 3; if so, increasing the frequency of a compressor of the air conditioner; if not, firstly reducing the rotating speed of the fan of the air conditioner and then increasing the frequency of the compressor of the air conditioner. This prior art discloses that the temperature and humidity of the room can be maintained by a time-sharing temperature and humidity control method, but this method only discloses that the frequency of the compressor of the air conditioner is increased when it is higher than the set temperature of the air conditioner; if not, firstly reducing the rotating speed of the fan of the air conditioner and then increasing the frequency of the compressor of the air conditioner. The more detailed schemes for compressor frequency adjustment and fan speed adjustment will not be apparent to those skilled in the art from this prior art disclosure.
Another method for controlling temperature and humidity is disclosed in the prior art, which discloses the following: b. calculating the running time of the air conditioner in a refrigeration mode, judging whether the working frequency of the compressor needs to be limited or not at present and whether the rotating speed of an indoor fan needs to be adjusted or not according to the following conditions when the running time reaches a preset threshold value: b1. if the difference value between the current indoor temperature and the preset temperature is more than or equal to 2 ℃, the working frequency of the compressor is not limited, and the current rotating speed of the indoor fan is not adjusted; b2. if the difference value between the current indoor temperature and the preset temperature is larger than or equal to 1 ℃ and smaller than 2 ℃, the working frequency of the compressor is not limited, but the rotating speed of the indoor fan is reduced to a gear lower than the rotating speed of the current indoor fan, and the lowest gear is used for running; b3. if the difference value between the current indoor temperature and the preset temperature is less than 1 ℃ and the current indoor relative humidity is more than or equal to 70%, the working frequency of the compressor is not limited, but the rotating speed of the indoor fan is reduced to two gears which are at most lower than the rotating speed of the current indoor fan and the lowest gear is a low-speed gear for operation; b4. and if the difference value between the current indoor temperature and the preset temperature is less than 1 ℃ and the current indoor relative humidity is less than 70%, limiting the working frequency of the compressor, and simultaneously reducing the rotating speed of the indoor fan to two gears which are at most lower than the rotating speed of the current indoor fan and the lowest gear which is a low-speed gear for operation. Although a relatively specific compressor frequency adjustment scheme and a fan rotating speed adjustment scheme are disclosed in the prior art, namely, the frequency limitation is performed on the working frequency or the gear adjustment is performed on the wind speed under a certain condition, the frequency limitation only limits the working frequency of the compressor to a fixed value, and the wind speed is only simply divided into four gears. It can be seen that the adjustment process of the operating frequency and the wind speed of the compressor is not fine.
Disclosure of Invention
The embodiment of the invention provides a method and a device for controlling an air conditioner and the air conditioner, and provides a more refined method for controlling the frequency of an air conditioner compressor and the rotating speed of a fan of the air conditioner, so as to improve the effect of temperature and humidity double control and improve the user experience. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of embodiments of the present invention, there is provided a method for controlling an air conditioner, including: acquiring indoor temperature t and indoor humidity RH in an air-conditioning refrigeration mode; and judging whether the indoor temperature t and the indoor humidity RH meet the conditions, if so, controlling the working frequency F of the compressor according to the indoor humidity RH, and adjusting the rotating speed R of the indoor fan according to the working frequency F of the compressor.
Alternatively, the operating frequency F of the compressor is calculated and adjusted according to the humidity difference Δ RH between the indoor humidity RH and the Target humidity RH _ Target, and the change Δ RH' of the indoor humidity.
Optionally, the preferred value of Target humidity RH Target is 52%.
Optionally, F is RH _ Ki × Δ RH' + RH _ Kp × Δ RH, where Δ RH is RH-RH _ Target and Δ RH is RH-RH1, RH1 is the indoor humidity acquired last time, and RH _ Ki and RH _ Kp are respectively set weighting coefficients.
Optionally, RH _ Ki is selected in relation to the system configuration and the ambient temperature, and RH _ Kp is selected in relation to the system configuration and the ambient temperature. The range of RH _ Ki is 1-10, and the range of RH _ Kp is 1-8. Preferably, RH _ Ki ═ 2, 3, 4, 5, 6, or 7; RH _ Kp ═ 2, 3, 4, 5, 6, or 7.
Optionally, when the calculated operating frequency F is greater than a set upper limit value, setting the operating frequency F of the compressor to the upper limit value; and when the calculated working frequency F is less than the set lower limit value, setting the working frequency F of the compressor as the lower limit value. The running efficiency of the air conditioner is guaranteed, and the service life of the air conditioner compressor is prolonged.
Optionally, adjusting the rotation speed R of the indoor fan according to the working frequency F of the compressor includes: the higher the frequency of the compressor, the higher the speed R of the indoor fan.
Optionally, a condition is satisfied when the temperature difference Δ T between the indoor temperature T and the set temperature T is less than a second set temperature difference Δ T2 and the indoor humidity RH is outside a target humidity range (RH1, RH 2); wherein the second set temperature difference Δ T2 is greater than zero.
Optionally, the target humidity range (RH1, RH2) is associated with the set temperature T.
Optionally, the method further comprises: when the temperature difference delta T between the indoor temperature T and the set temperature T is smaller than a second set temperature difference delta T2 and the indoor humidity RH is within a target humidity range (RH1, RH2), keeping the rotating speed R of the indoor fan and the working frequency F of the compressor unchanged.
Optionally, the method further comprises: when the temperature difference delta T between the indoor temperature T and the set temperature T is greater than or equal to a second set temperature difference delta T2 and less than a first set temperature difference delta T1, the working frequency F of the compressor is adjusted to a set frequency F1.
Optionally, the set frequency f1 is 70% of the maximum compressor frequency.
Optionally, the method further comprises: and when the temperature difference delta T between the indoor temperature T and the set temperature T is greater than or equal to the first set temperature difference delta T1, increasing the working frequency F of the compressor and/or the rotating speed R of the indoor fan so as to reduce the indoor temperature.
According to a second aspect of embodiments of the present invention, there is provided an apparatus for controlling an air conditioner, including a first temperature sensor for acquiring an indoor temperature t and a humidity sensor for acquiring an indoor humidity RH, and a Micro Controller Unit (MCU) including: the judgment unit is used for judging whether the conditions are met or not according to the indoor temperature t acquired by the first temperature sensor and the indoor humidity RH acquired by the humidity sensor in the refrigeration mode; and the adjusting unit is used for controlling the working frequency F of the compressor according to the indoor humidity RH and adjusting the rotating speed R of the indoor fan according to the working frequency F of the compressor when the judging unit judges that the conditions are met.
Optionally, the MCU further comprises: the calculating unit is used for calculating and adjusting the working frequency F of the compressor according to the humidity difference delta RH between the indoor humidity RH and the Target humidity RH _ Target and the change delta RH' of the indoor humidity; and the adjusting unit is used for adjusting the working frequency F of the compressor according to the calculation result of the calculating unit.
Optionally, the preferred value of Target humidity RH Target is 52%.
Alternatively, F is RH _ Ki × Δ RH' + RH _ Kp × Δ RH, Δ RH is RH-RH _ Target, Δ RH is RH-RH1, RH1 is the indoor humidity acquired last time, and RH _ Ki and RH _ Kp are respectively set weighting coefficients.
Optionally, RH _ Ki is selected in relation to the system configuration and the ambient temperature, and RH _ Kp is selected in relation to the system configuration and the ambient temperature. The range of RH _ Ki is 1-10, and the range of RH _ Kp is 1-8. Preferably, RH _ Ki ═ 2, 3, 4, 5, 6, or 7; RH _ Kp ═ 2, 3, 4, 5, 6, or 7.
Optionally, when the calculated operating frequency F is greater than a set upper limit value, setting the operating frequency F of the compressor to the upper limit value; and when the calculated working frequency F is less than the set lower limit value, setting the working frequency F of the compressor as the lower limit value. The running efficiency of the air conditioner is guaranteed, and the service life of the air conditioner compressor is prolonged.
Optionally, adjusting the rotation speed R of the indoor fan according to the working frequency F of the compressor includes: the higher the frequency of the compressor, the higher the speed R of the indoor fan.
Optionally, a condition is satisfied when the temperature difference Δ T between the indoor temperature T and the set temperature T is less than a second set temperature difference Δ T2 and the indoor humidity RH is outside a target humidity range (RH1, RH 2); wherein the second set temperature difference Δ T2 is greater than zero.
Optionally, when the temperature difference Δ T between the indoor temperature T and the set temperature T is less than the second set temperature difference Δ T2 and the indoor humidity RH is within the target humidity range (RH1, RH2), the rotating speed R of the indoor fan and the operating frequency F of the compressor are kept unchanged.
Optionally, the adjusting unit is further configured to adjust the operating frequency F of the compressor to a set frequency F1 when the temperature difference Δ T between the indoor temperature T and the set temperature T is greater than or equal to a second set temperature difference Δ T2 and less than a first set temperature difference Δ T1.
Optionally, the set frequency f1 is 70% of the maximum compressor frequency.
Optionally, the adjusting unit is further configured to increase the operating frequency F of the compressor and/or the rotation speed R of the indoor fan to decrease the indoor temperature when the temperature difference Δ T is greater than or equal to the first set temperature difference Δ T1.
According to a third aspect of embodiments of the present invention, there is provided an air conditioner comprising a compressor and an indoor fan, and further comprising any one of the above-described devices.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the utility model provides a method of the fan rotational speed of the control air condition compressor's that becomes more meticulous frequency and air conditioner, under the refrigeration mode, gather real-time indoor temperature and indoor humidity, judge whether need adjust the running state of air conditioner, synthesize indoor humidity and adjust the operating frequency of compressor, and then adjust the rotational speed of indoor fan to make indoor humidity and indoor temperature all be located the target range of settlement, can effectual control latent heat/apparent heat ratio, improve the effect of the two accuses of temperature and humidity, improved user experience simultaneously.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flowchart illustrating a method for controlling an air conditioner according to an exemplary embodiment;
FIG. 2 is a flowchart illustrating a method for controlling an air conditioner according to an exemplary embodiment;
fig. 3 is a block diagram illustrating a structure of an apparatus for controlling an air conditioner according to an exemplary embodiment;
fig. 4 is a block diagram illustrating a structure of an apparatus for controlling an air conditioner according to an exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. For the structures, products and the like disclosed by the embodiments, the description is relatively simple because the structures, the products and the like correspond to the parts disclosed by the embodiments, and the relevant parts can be just described by referring to the method part.
The refrigerating capacity of the air conditioner is divided into sensible heat and latent heat, the sensible heat mainly affects the indoor temperature, the latent heat mainly affects the indoor humidity, and therefore both the sensible heat and the latent heat can affect the comfort level of people. When the temperature difference between rooms is large, the temperature of the rooms is expected to be reduced as soon as possible, and the larger the sensible heat ratio of the air conditioner is, the better the sensible heat ratio is. When the room temperature approaches or reaches the set temperature and the humidity is high, the latent heat ratio of the air conditioner is required to be larger as well as better when dehumidification is required. In this embodiment, the latent heat/sensible heat ratio can be effectively controlled by controlling the rotating speed of the indoor fan and the working frequency of the compressor, so that the effects of dehumidification and cooling are achieved. And through reasonable control latent heat/apparent heat ratio, can accomplish temperature and humidity two accuse, with indoor humidity and indoor temperature control in the target range of setting for. Fig. 1 is a flowchart illustrating a method for controlling an air conditioner according to an exemplary embodiment. As shown in fig. 1, includes:
and step S101, acquiring indoor temperature t and indoor humidity RH in an air-conditioning refrigeration mode.
In this embodiment, the operation mode of the air conditioner can be adjusted by the remote controller of the air conditioner, the control panel on the indoor unit of the air conditioner, or the mobile terminal with remote control function for the air conditioner, such as: and the refrigeration mode of the air conditioner is controlled by clicking a refrigeration mode button on the remote controller.
The air conditioner is generally installed in the indoor space such as the living room, the bedroom, and the conference room, and therefore, the current temperature value of the indoor space such as the living room, the bedroom, or the conference room where the air conditioner is installed, which is obtained in step S101, is the real-time indoor temperature t obtained in the current process.
The air conditioner is provided with a first temperature sensor for detecting a current temperature value of an indoor environment. The sensing end of the first temperature sensor can be arranged on the air inlet of the air conditioner or the outer wall of the shell, so that the detected current temperature value can be the same as or close to the actual temperature of the indoor environment, and the accuracy of adjusting the working frequency of the compressor of the air conditioner and the rotating speed of the indoor fan according to the current indoor temperature value is improved.
The air conditioner is provided with a humidity sensor for detecting the current humidity value of the indoor environment, namely the real-time indoor humidity RH obtained in the current process. The sensing end of the humidity sensor can be arranged on the air inlet of the air conditioner or the outer wall of the shell, so that the current humidity value detected by the humidity sensor can be the same as or close to the actual humidity of the indoor environment, and the accuracy of adjusting the working frequency of the compressor of the air conditioner and the rotating speed of the indoor fan according to the current indoor humidity value is improved.
And S102, judging whether conditions are met or not according to the indoor temperature t and the indoor humidity RH, if so, controlling the working frequency F of the compressor according to the indoor humidity RH, and adjusting the rotating speed R of the indoor fan according to the working frequency F of the compressor so as to enable the indoor humidity and the indoor temperature to be within a set target range.
The air conditioning system presets judgment conditions aiming at the indoor temperature t and the indoor humidity RH, judges whether the conditions are met according to the indoor temperature t and the indoor humidity RH collected in the step S101, if so, controls the working frequency F of the compressor according to the indoor humidity RH, and adjusts the rotating speed R of the indoor fan according to the working frequency F of the compressor so as to enable the indoor humidity and the indoor temperature to be within the set target range. The working frequency F of the compressor is adjusted based on a plurality of parameters, and the adjustment accuracy is improved.
In this embodiment, a method for controlling the frequency of an air conditioner compressor and the rotating speed of a fan of an air conditioner in a refined manner is provided, in a refrigeration mode, real-time indoor temperature and indoor humidity are collected, whether the running state of the air conditioner needs to be adjusted is judged, the working frequency of the compressor is adjusted by integrating the indoor humidity, and then the rotating speed of the indoor fan is adjusted, so that the indoor humidity and the indoor temperature are both located in a set target range, the latent heat/sensible heat ratio can be effectively controlled, the temperature and humidity double control effect is improved, and meanwhile, the user experience is improved.
In some embodiments, a second temperature sensor is arranged on the surface of the coil of the indoor unit of the air conditioner or the inner wall of the air conditioner shell close to the coil and used for detecting the indoor coil temperature Tpn of the air conditioner. So as to adjust the working frequency of the compressor of the air conditioner and the rotating speed of the indoor fan.
In some embodiments, the coil temperature of the indoor unit of the air conditioner can be calculated according to the working frequency of the compressor and the rotating speed of the indoor fan.
In some embodiments, in step S201, it is determined whether the conditions are met according to the indoor temperature t and the indoor humidity RH, and if yes, the operating frequency F of the compressor is controlled according to the temperature Tpn of the indoor coil, and the rotating speed R of the indoor fan is adjusted according to the operating frequency F of the compressor, so that both the indoor humidity and the indoor temperature are within the set target range.
In some embodiments, in step S201, it is determined whether the conditions are met according to the indoor temperature t and the indoor humidity RH, and if yes, the operating frequency F of the compressor is controlled according to the temperature Tpn of the indoor coil and the indoor humidity RH, and the rotating speed R of the indoor fan is adjusted according to the operating frequency F of the compressor, so that both the indoor humidity and the indoor temperature are within the set target range.
In any of the foregoing embodiments, the indoor target temperature corresponds to a target humidity range (RH1, RH2), and here, a correspondence relationship between an indoor target temperature value and a target humidity range (RH1, RH2) may be stored in advance in the air conditioning system, that is, for each indoor target temperature, a plurality of human bodies may be tested, humidity that the corresponding human body feels most comfortable is obtained, humidity values corresponding to set sensible comfort levels of a plurality of human body collection samples in a set area of the indoor target temperature are obtained, and according to the humidity values, the target humidity range (RH1, RH2) corresponding to the indoor target temperature is determined, and the correspondence relationship is stored. For example: the indoor target temperature is 25 ℃, and at this time, the humidity is between 40% and 60% of the relative humidity, and most users feel the most comfortable, so that the target humidity range corresponding to the set temperature of 25 ℃ can be determined from the humidity of 40% to 60%, and the corresponding relationship between the indoor target temperature of 25 ° and the target humidity range of 40% to 60% is preserved.
Thus, the correspondence relationship between the indoor target temperature and the target humidity range pre-stored in the air conditioning system can be as shown in table 1:
TABLE 1
Indoor target temperature Target humidity range
30℃ The humidity is 30 to 50 percent
28℃ The humidity is 30 to 60 percent
25℃ The humidity is 40 to 60 percent
According to the correspondence shown in table 1, a current target humidity range (RH1, RH2) corresponding to the current indoor target temperature of the air conditioner is determined. As shown in table 1, the current set temperature is 28 °, and the current target humidity range is 30% to 60%.
The indoor temperature can be changed continuously in the air conditioner operation process, and the indoor temperature needs to be controlled within a certain range to meet the requirements of users. The indoor temperature target range depends on the indoor target temperature set by the user and is determined according to the indoor target temperature set by the user and the temperature fluctuation value preset by the system. The indoor target temperature is set by a user through an air conditioner remote controller, a control panel on an air conditioner indoor unit or a mobile terminal with a remote control function on the air conditioner. For example: the preset temperature fluctuation value of the system is 2 ℃, the indoor target temperature set by the user is 28 ℃, and the indoor temperature target range is (26 ℃, 30 ℃).
In some embodiments, the operating frequency F of the compressor is calculated and adjusted based on the temperature difference PT between the temperature Tpn of the indoor coil and the target temperature Tpm of the indoor coil, and the temperature change DT of the indoor coil. Specifically, the operating frequency F of the compressor is determined according to the following equation (1):
F=T_Ki×DT+T_Kp×PT; (1)
wherein PT is Tpn-Tpm, and DT is Tpn-Tpn 1; tpn1 is the indoor coil temperature collected in the previous time; t _ Kp and T _ Ki are weighting coefficients, respectively.
Wherein, T _ Ki is selected according to system configuration and external environment temperature, and T _ Kp is selected according to system configuration and external environment temperature. Such as: the higher the outside environment temperature is, the higher the value of T _ Ki or T _ Kp is. The external environment temperature is high, and the amplitude of each parameter needing to be adjusted to reach the target temperature or humidity is larger, so the weighting coefficient is larger. The outside ambient temperature includes an indoor ambient temperature or an outdoor ambient temperature. In the system configuration, T _ Ki and T _ Kp are selected in relation to the throttling device being a capillary tube or an expansion valve, the displacement capacity of the compressor or the size of the condenser and evaporator.
The value range of T _ Ki is 1 to 10, and the value range of T _ Kp is 1 to 8, preferably, T _ Ki is 3, 4, 5, 6 or 7, T _ Kp is 3, 4, 5, 6 or 7, for example, when T _ Ki is 4, T _ Kp is 5, PT is 10, and DT is 2, F is 4 × 2+5 × 10 is 58, in Hz, according to formula (1).
In some embodiments, the operating frequency F of the compressor is calculated and adjusted according to the humidity difference Δ RH between the indoor humidity RH and the Target humidity RH _ Target, and the change Δ RH' of the indoor humidity. Specifically, the operating frequency F of the compressor is determined according to the following equation (2):
F=RH_Ki×ΔRH’+RH_Kp×ΔRH; (2)
wherein Δ RH ═ RH-RH _ Target, Δ RH ═ RH-RH 1; RH1 is the indoor humidity acquired at the previous time, and RH _ Ki and RH _ Kp are respectively set weighting coefficients.
Wherein, the selection of RH _ Ki is related to the system configuration and the external environment temperature, and the selection of RH _ Kp is related to the system configuration and the external environment temperature. Such as: the higher the external environment temperature is, the larger the value of RH _ Ki or RH _ Kp is. The external environment temperature is high, and the amplitude of each parameter needing to be adjusted to reach the target temperature or humidity is larger, so the weighting coefficient is larger. The outside ambient temperature includes an indoor ambient temperature or an outdoor ambient temperature. In the system configuration, RH _ Ki and RH _ Kp are selected in relation to the size of the throttling device, which is a capillary or an expansion valve, the displacement capacity of the compressor or the size of the condenser and evaporator.
Preferably, RH _ Ki is 2, 3, 4, 5, 6 or 7, RH _ Kp is 2, 3, 4, 5, 6 or 7, preferably the Target humidity RH _ Target is 52%, for example, when RH _ Ki is 2, RH _ Kp is 4, Δ RH is 15, Δ RH' is 4, F is 2 × 4+4 × 15 is 68, in Hz according to formula (1).
In some embodiments, first, a first candidate operating frequency of the compressor is calculated from equation (1) according to the temperature Tpn of the indoor coil; secondly, calculating a second candidate working frequency of the compressor according to the indoor humidity RH by the formula (2); and finally, taking the smaller value of the first candidate working frequency and the second candidate working frequency as the working frequency F of the compressor. Different parameters are integrated to calculate the working frequency of the compressor, and the air conditioner adjusting accuracy is further improved.
In some embodiments, the air conditioning system is provided with an operating frequency range of the compressor. When the calculated working frequency F is greater than a set upper limit value, setting the working frequency F of the compressor as the upper limit value; and when the calculated working frequency F is less than the set lower limit value, setting the working frequency F of the compressor as the lower limit value. The running efficiency of the air conditioner is guaranteed, and the service life of the air conditioner compressor is prolonged. Preferably, the operating frequency range of the compressor is (30Hz, 70 Hz). Such as: when the preset working frequency range of the compressor is (30Hz, 70Hz), if the working frequency F of the compressor obtained according to the formula (1) or (2) is 25Hz, adjusting the working frequency of the compressor to be a set lower limit value of 30 Hz; and (3) if the working frequency F of the compressor obtained according to the formula (1) or (2) is 75Hz, adjusting the working frequency of the compressor to be 70Hz of the set upper limit value.
In any of the foregoing embodiments, after determining the operating frequency F of the compressor, adjusting the rotation speed R of the indoor fan according to the operating frequency F of the compressor includes: the higher the frequency of the compressor, the higher the speed R of the indoor fan.
The specific adjustment mode is as follows: an optional mode is that the rotation speed of the fan is obtained by table look-up through a preset corresponding relation between the working frequency F of the compressor and the rotation speed R of the indoor fan, and the specific corresponding relation is shown in table 2:
TABLE 2
When the indoor fan runs at a high speed, the temperature of the coil pipe is high, the sensible heat proportion is high, the dehumidification amount is small, and when the indoor fan runs at a high speed and a low speed, the temperature of the coil pipe is low, the latent heat proportion is high, and the dehumidification amount is large.
The rotating speeds of the indoor fans corresponding to different working frequency sections of the compressor are different, the rotating speed of the indoor fan corresponding to the low frequency section is low, and the rotating speed of the indoor fan corresponding to the high frequency section is high.
Alternatively, the rotation speed R of the indoor fan is calculated from the operating frequency F of the compressor by a calculation method, specifically, according to the following formula (3):
R=15×F+50。 (3)
as shown in fig. 2, a method for controlling an air conditioner according to an embodiment includes steps S101, collecting indoor temperature T and indoor humidity RH in an air-conditioning refrigeration mode, executing step S201 when the temperature difference delta T between the indoor temperature T and a set temperature T is less than a second set temperature difference delta T2 and the indoor humidity RH is outside a target humidity range (RH1, RH2), when the temperature difference Δ T between the indoor temperature T and the set temperature T is less than the second set temperature difference Δ T2 and the indoor humidity RH is within the target humidity range (RH1, RH2), executing step S202, when the temperature difference Δ T between the indoor temperature T and the set temperature T is greater than or equal to the second set temperature difference Δ T2 and less than the first set temperature difference Δ T1, step S203 is executed, when the temperature difference Δ T is greater than or equal to the first set temperature difference Δ T1, step S204 is performed.
The air conditioner is preset with a first set temperature differential Δ T1 and a second set temperature differential Δ T2. Wherein the first set temperature differential Δ T1 and the second set temperature differential Δ T2 are greater than zero. The first set temperature differential Δ T1 is greater than the second set temperature differential Δ T2.
In step S201, when the temperature difference Δ T between the indoor temperature T and the set temperature T is smaller than a second set temperature difference Δ T2, and the indoor humidity RH is outside the target humidity range (RH1, RH2), i.e. T-T < Δ T2, and RH (RH1, RH2), the operating frequency F of the compressor is controlled according to the indoor humidity RH, and the rotating speed R of the indoor fan is adjusted according to the operating frequency F of the compressor, so that both the indoor humidity and the indoor temperature are within the set target range.
In some embodiments, in step S201, when the temperature difference Δ T between the indoor temperature T and the set temperature T is less than the second set temperature difference Δ T2, and the indoor humidity RH is outside the target humidity range (RH1, RH2), the condition is satisfied, i.e., T-T < Δ T2, and RH (RH1, RH2), at this time, the operating frequency F of the compressor is controlled according to the temperature Tpn of the indoor coil, and the rotating speed R of the indoor fan is adjusted according to the operating frequency F of the compressor, so that the indoor humidity and the indoor temperature are both within the set target range.
In some embodiments, in step S201, when the temperature difference Δ T between the indoor temperature T and the set temperature T is less than a second set temperature difference Δ T2, and the indoor humidity RH is outside the target humidity range (RH1, RH2), a condition is satisfied, i.e., T-T < Δ T2, and RH (RH1, RH2), at this time, it is determined whether the condition is satisfied according to the indoor temperature T and the indoor humidity RH, if so, the operating frequency F of the compressor is controlled according to the temperature Tpn of the indoor coil and the indoor humidity RH, and the rotating speed R of the indoor fan is adjusted according to the operating frequency F of the compressor, so that both the indoor humidity and the indoor temperature are within the set target range.
In step S202, when the temperature difference Δ T between the indoor temperature T and the set temperature T is smaller than the second set temperature difference Δ T2 and the indoor humidity RH is within the target humidity range (RH1, RH2), the condition that T-T < Δ T2 and RH ∈ [ RH1, RH2] is not satisfied, at this time, the rotation speed R of the indoor fan and the operating frequency F of the compressor are kept unchanged.
In step S203, when the temperature difference Δ T between the indoor temperature T and the set temperature T is greater than or equal to the second set temperature difference Δ T2 and less than the first set temperature difference Δ T1, i.e., Δ T2 ≦ T-T < Δ T1, the operating frequency F of the compressor is adjusted to a set frequency F1.
In some embodiments, the set frequency f1 is 70% of the maximum compressor frequency.
In the foregoing embodiment, when the temperature difference Δ T is greater than or equal to the first set temperature difference Δ T1, i.e., T-T ≧ Δ T1, the operating frequency F of the compressor is increased to reduce the indoor temperature.
In other embodiments, when the temperature difference Δ T is greater than or equal to the first set temperature difference Δ T1, i.e., T-T ≧ Δ T1, the speed R of the indoor fan is increased to decrease the indoor temperature.
In other embodiments, when the temperature difference Δ T is greater than or equal to the first set temperature difference Δ T1, i.e., T-T ≧ Δ T1, the operating frequency F of the compressor is increased, and the rotational speed R of the indoor fan is increased to increase the rate of reducing the indoor temperature.
The following are embodiments of the disclosed apparatus that may be used to perform embodiments of the disclosed methods.
Fig. 3 is a block diagram illustrating a structure of an apparatus for controlling an air conditioner according to an exemplary embodiment. As shown in fig. 3, includes: a first temperature sensor 301, a humidity sensor 302 and an MCU303, the MCU303 comprising: a judgment unit 3031 and an adjustment unit 3032.
A first temperature sensor 301 for acquiring the indoor temperature t.
And the humidity sensor 302 is used for acquiring indoor humidity RH.
In this embodiment, the sensing end of the first temperature sensor is disposed on the air inlet of the air conditioner or the outer wall of the housing, and the sensing end of the humidity sensor is disposed on the air inlet of the air conditioner or the outer wall of the housing.
The determining unit 3031 is configured to determine whether a condition is satisfied according to the indoor temperature t and the indoor humidity RH.
And the adjusting unit 3032 is configured to, when the determining unit 3031 determines that the condition is met, control the operating frequency F of the compressor according to the indoor humidity RH, and adjust the rotation speed R of the indoor fan according to the operating frequency F of the compressor, so that both the indoor humidity and the indoor temperature are within the set target range.
In this embodiment, under the refrigeration mode, real-time indoor temperature is gathered with humidity transducer to first temperature sensor, judge whether need adjust the running state of air conditioner by the judgement unit, the regulating unit adjusts the operating frequency of compressor according to indoor humidity, and then the rotational speed of adjustment indoor fan, so that indoor humidity and indoor temperature all are located the target range who sets for, can effectual control latent heat/show the fever ratio, improve the effect of warm and humid two accuses, user experience has been improved simultaneously.
In some embodiments, the adjusting unit 3032 is configured to, when the determining unit determines that the condition is met, control an operating frequency F of the compressor according to the temperature Tpn of the indoor coil, and adjust a rotation speed R of the indoor fan according to the operating frequency F of the compressor, so that the indoor humidity and the indoor temperature are both within a set target range.
In some embodiments, the adjusting unit 3032 is configured to, when the determining unit determines that the condition is satisfied, control an operating frequency F of the compressor according to the temperature Tpn of the indoor coil and the indoor humidity RH, and adjust a rotating speed R of the indoor fan according to the operating frequency F of the compressor, so that both the indoor humidity and the indoor temperature are within a set target range.
In some embodiments, as shown in fig. 4, the apparatus for controlling an air conditioner further includes: a calculation unit 401.
The calculating unit 401 is configured to calculate and adjust the operating frequency F of the compressor according to the temperature difference Δ RH between the indoor humidity RH and the indoor Target humidity RH _ Target, and the indoor humidity change Δ RH'. Specifically, the operating frequency F of the compressor is calculated according to equation (2).
In some embodiments, the calculating unit 401 is configured to calculate the operating frequency F of the compressor according to the temperature Tpn of the indoor coil, the temperature difference PT of the target temperature Tpm of the indoor coil, and the temperature change DT of the indoor coil. Specifically, the operating frequency F of the compressor is calculated according to equation (1).
In some embodiments, the indoor coil temperature is measured by a second temperature sensor disposed on a surface of a coil of the air conditioning indoor unit or on an inner wall of the air conditioning cabinet proximate the coil.
In some embodiments, the indoor coil temperature is calculated based on the operating frequency of the compressor and the speed of the indoor fan.
In some embodiments, the calculating unit 401 is configured to calculate a first candidate operating frequency of the compressor according to equation (1) based on the temperature Tpn of the indoor coil; and calculating a second candidate operating frequency of the compressor from equation (2) based on the indoor humidity RH. And finally, taking the smaller value of the first candidate working frequency and the second candidate working frequency as the working frequency F of the compressor.
An adjusting unit 3032, configured to adjust the operating frequency F of the compressor according to the calculation result of the calculating unit 401.
In any of the foregoing embodiments, the air conditioning system is provided with an operating frequency range of the compressor, and when the operating frequency F calculated by the calculation unit 401 is greater than a set upper limit value, the operating frequency F of the compressor is set to the upper limit value; and when the calculated working frequency F is less than the set lower limit value, setting the working frequency F of the compressor as the lower limit value so as to ensure the operating efficiency of the air conditioner and prolong the service life of the compressor of the air conditioner.
The adjusting unit 3032 adjusts the rotating speed R of the indoor fan according to the working frequency F of the compressor, and the higher the working frequency F of the compressor is, the higher the rotating speed R of the indoor fan is.
An optional mode is that the fan rotating speed is obtained according to table 2 through a preset corresponding relation between the working frequency F of the compressor and the rotating speed R of the indoor fan.
Alternatively, the rotation speed R of the indoor fan is determined by the calculation unit 401 according to the formula (3) from the operating frequency F of the compressor.
In some embodiments, when the temperature difference Δ T between the indoor temperature T and the set temperature T is less than the second set temperature difference Δ T2 and the indoor humidity RH is outside the target humidity range (RH1, RH2), the condition is satisfied, where the calculating unit 401 is configured to calculate the operating frequency of the compressor according to the indoor humidity RH by equation (2), and the adjusting unit 3032 is configured to adjust the operating frequency of the compressor according to the calculation result of the calculating unit 401.
In some embodiments, the condition is satisfied when the temperature difference Δ T between the indoor temperature T and the set temperature T is less than a second set temperature difference Δ T2 and the indoor humidity RH is outside the target humidity range (RH1, RH2), where the calculating unit 401 is configured to calculate the operating frequency of the compressor according to the temperature Tpn of the indoor coil by equation (1), and the adjusting unit 3032 is configured to adjust the operating frequency of the compressor according to the calculation result of the calculating unit 401.
In some embodiments, the condition is satisfied when the temperature difference Δ T between the indoor temperature T and the set temperature T is less than a second set temperature difference Δ T2 and the indoor humidity RH is outside the target humidity range (RH1, RH2), when the calculating unit 401 is configured to calculate the first candidate operating frequency of the compressor according to the indoor coil temperature Tpn by equation (1); calculating a second candidate operating frequency of the compressor according to the indoor humidity RH by equation (2); and the adjusting unit 3032 is configured to adjust the operating frequency of the compressor according to the calculation result of the calculating unit 401 by taking the smaller one of the first candidate operating frequency and the second candidate operating frequency as the operating frequency F of the compressor.
In some embodiments, when the temperature difference Δ T between the indoor temperature T and the set temperature T is less than the second set temperature difference Δ T2 and the indoor humidity RH is within the target humidity range (RH1, RH2), the rotation speed R of the indoor fan and the operating frequency F of the compressor are maintained constant.
In some embodiments, the adjusting unit 3032 is further configured to adjust the operating frequency F of the compressor to a set frequency F1 when the temperature difference Δ T between the indoor temperature T and the set temperature T is greater than or equal to the second set temperature difference Δ T2 and less than the first set temperature difference Δ T1.
In some embodiments, the set frequency f1 is 70% of the maximum compressor frequency.
In some embodiments, the adjusting unit 3032 is further configured to increase the operating frequency F of the compressor to decrease the indoor temperature when the temperature difference Δ T is greater than or equal to the first set temperature difference Δ T1.
In other embodiments, the adjusting unit 3032 is further configured to increase the rotation speed R of the indoor fan to decrease the indoor temperature when the temperature difference Δ T is greater than or equal to the first set temperature difference Δ T1.
In other embodiments, the adjusting unit 3032 is further configured to increase the operating frequency F of the compressor and simultaneously increase the rotation speed R of the indoor fan to increase the rate of reducing the indoor temperature when the temperature difference Δ T is greater than or equal to the first set temperature difference Δ T1.
The present disclosure also includes an air conditioner comprising a compressor and an indoor fan, and further comprising the apparatus of any of the foregoing embodiments.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (7)

1. A method for air conditioning control, comprising:
acquiring indoor temperature t and indoor humidity RH in an air-conditioning refrigeration mode;
judging whether the indoor temperature t and the indoor humidity RH meet the conditions, if so, calculating and adjusting the working frequency F of the compressor according to the humidity difference delta RH between the indoor humidity RH and the Target humidity RH _ Target and the change delta RH' of the indoor humidity, and adjusting the rotating speed R of the indoor fan according to the working frequency F of the compressor;
wherein a condition is satisfied when a temperature difference Δ T between the indoor temperature T and a set temperature T is less than a second set temperature difference Δ T2 and the indoor humidity RH is outside a target humidity range (RH1, RH 2); the second set temperature difference Δ T2 is greater than zero;
determining the operating frequency F of the compressor according to the following formula:
F = RH_Ki×ΔRH’ + RH_Kp×ΔRH
wherein Δ RH = RH-RH _ Target, Δ RH' = RH-RH 1; RH1 is the indoor humidity collected at the previous time, and RH _ Ki and RH _ Kp are respectively set weighting coefficients;
and calculating the rotating speed R of the indoor fan according to the following formula by using the working frequency F of the compressor:
R=15 × F+50。
2. the method of claim 1, further comprising: when the temperature difference delta T between the indoor temperature T and the set temperature T is smaller than a second set temperature difference delta T2 and the indoor humidity RH is within a target humidity range (RH1, RH2), keeping the rotating speed R of the indoor fan and the working frequency F of the compressor unchanged.
3. The method of claim 2, further comprising: when the temperature difference delta T between the indoor temperature T and the set temperature T is greater than or equal to a second set temperature difference delta T2 and less than a first set temperature difference delta T1, the working frequency F of the compressor is adjusted to a set frequency F1.
4. The utility model provides a device for air conditioner control, is including the humidity transducer who is used for gathering indoor temperature t and is used for gathering indoor humidity RH and little the control unit MCU, its characterized in that, MCU includes:
the judgment unit is used for judging whether the conditions are met or not according to the indoor temperature t acquired by the first temperature sensor and the indoor humidity RH acquired by the humidity sensor in the refrigeration mode;
the calculating unit is used for calculating and adjusting the working frequency F of the compressor according to the humidity difference delta RH between the indoor humidity RH and the Target humidity RH _ Target and the change delta RH' of the indoor humidity;
the adjusting unit is used for adjusting the working frequency F of the compressor according to the calculation result of the calculating unit and adjusting the rotating speed R of the indoor fan according to the working frequency F of the compressor when the judging unit judges that the conditions are met;
wherein a condition is satisfied when a temperature difference Δ T between the indoor temperature T and a set temperature T is less than a second set temperature difference Δ T2 and the indoor humidity RH is outside a target humidity range (RH1, RH 2); the second set temperature difference Δ T2 is greater than zero;
determining the operating frequency F of the compressor according to the following formula:
F = RH_Ki×ΔRH’ + RH_Kp×ΔRH
wherein Δ RH = RH-RH _ Target, Δ RH' = RH-RH 1; RH1 is the indoor humidity collected at the previous time, and RH _ Ki and RH _ Kp are respectively set weighting coefficients;
and calculating the rotating speed R of the indoor fan according to the following formula by using the working frequency F of the compressor:
R=15 × F+50。
5. the apparatus of claim 4, wherein the indoor fan speed R and the compressor operating frequency F are maintained when the difference Δ T between the indoor temperature T and the set temperature T is less than the second set temperature difference Δ T2 and the indoor humidity RH is within a target humidity range (RH1, RH 2).
6. The apparatus as claimed in claim 5, wherein the adjusting unit is further adapted to adjust the operating frequency F of the compressor to a set frequency F1 when the temperature difference Δ T between the indoor temperature T and the set temperature T is greater than or equal to a second set temperature difference Δ T2 and less than a first set temperature difference Δ T1.
7. An air conditioner comprising a compressor and an indoor fan, characterized by further comprising the apparatus for air conditioning control as claimed in any one of claims 4 to 6.
CN201710787684.8A 2017-09-04 2017-09-04 Method and device for controlling air conditioner and air conditioner Active CN107560106B (en)

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EP17923011.5A EP3677850A4 (en) 2017-09-04 2017-11-03 Control method and apparatus for self-cleaning of air conditioner, and air conditioner
JP2020512047A JP2020532703A (en) 2017-09-04 2017-11-03 Methods, devices, and air conditioners for controlling air conditioners
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CN108489025B (en) * 2018-03-09 2020-07-03 广东美的制冷设备有限公司 Air conditioner, control method thereof, and computer-readable storage medium
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