CN107621051B - Method and device for double control of temperature and humidity of air conditioner - Google Patents

Abstract

The invention discloses a method and a device for double control of temperature and humidity of an air conditioner, and belongs to the technical field of air conditioners. The method comprises the following steps: acquiring a current temperature value and a current humidity value of a space where an air conditioner is located; when the current temperature value is not in the target temperature range and the current humidity value is not in the target humidity range, controlling a fan of the air conditioner to operate in a sine or cosine wind speed change form; determining a wind speed threshold corresponding to the frequency switching of the compressor according to the maximum wind speed value and the minimum wind speed value; when the current wind speed of the fan is larger than a wind speed threshold value, controlling the compressor to operate at a first frequency; and when the current wind speed value of the fan is smaller than the wind speed threshold value, controlling the compressor to operate at a second frequency, wherein the first frequency is smaller than the second frequency. The method for double controlling the temperature and the humidity of the air conditioner can ensure that both the indoor temperature and the indoor humidity can meet the requirement of the comfort level of a user, and avoids the influence of other environmental parameter fluctuation caused by adjusting a single indoor environmental parameter.

Description

Method and device for double control of temperature and humidity of air conditioner

Technical Field

The invention relates to the technical field of air conditioner control, in particular to a method and a device for double control of temperature and humidity of an air conditioner.

Background

At present, a large amount of condensed water is generated in the refrigerating operation process of the existing household air conditioner, and a large amount of bacteria can breed under the conditions of proper humidity and temperature; and bacteria are transported into the room with the supply air, which can seriously affect the comfort and health of the user. Relevant studies have demonstrated that bacteria are most susceptible to growth under high humidity or high temperature conditions.

In addition, in the actual operation process of the household air conditioner, when the deviation between the set temperature and the room temperature is large, the compressor operates at high frequency, at the moment, the temperature of the coil pipe of the internal machine is generally low (lower than the dew point temperature of air), water vapor in the air is continuously condensed, when the room temperature reaches the set temperature, the humidity can be very low, and the common air conditioner has no humidifying function, so that a user feels uncomfortable and dry; when room temperature and set temperature difference are very little, the most low frequency operation of air conditioner, and the indoor set coil pipe temperature is generally higher (is higher than air dew point temperature) this moment, and vapor in the air can not got rid of by the condensation, and like this when room temperature reaches the set temperature, air humidity probably is big partially, and the user feels uncomfortable equally. Therefore, the existing air conditioner control method often cannot adjust the indoor temperature and humidity at the same time, so that the indoor temperature and humidity cannot meet the requirements of comfort level and health of users.

Disclosure of Invention

The invention provides a method and a device for double controlling the temperature and the humidity of an air conditioner, and aims to solve the problem that the existing air conditioner cannot give consideration to both the indoor temperature and the humidity regulation. 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 the invention, a method for controlling temperature and humidity of an air conditioner is provided, and the method comprises the following steps: acquiring a current temperature value and a current humidity value of a space where an air conditioner is located; when the current temperature value is not in the target temperature range and the current humidity value is not in the target humidity range, controlling a fan of the air conditioner to operate in a sine or cosine wind speed change form, wherein the maximum wind speed value and the minimum wind speed value in the wind speed change form are determined according to the temperature difference value between the current temperature value and the set temperature value or the humidity difference value between the current humidity value and the set humidity value; determining a wind speed threshold corresponding to the frequency switching of the compressor according to the maximum wind speed value and the minimum wind speed value; when the current wind speed of the fan is larger than a wind speed threshold value, controlling the compressor to operate at a first frequency; and when the current wind speed value of the fan is smaller than the wind speed threshold value, controlling the compressor to operate at a second frequency, wherein the first frequency is smaller than the second frequency.

Further, the maximum wind speed value and the minimum wind speed value of the wind speed variation form are determined according to the humidity difference value between the current humidity value and the set humidity value, and the method comprises the following steps: determining a humidity deviation value of the humidity difference value and the first humidity difference value determined last time; and determining a first maximum wind speed value and a first minimum wind speed value according to the humidity deviation value.

Further, determining a first maximum wind speed value and a first minimum wind speed value according to the humidity deviation value includes:

the first maximum wind speed value is calculated according to the following formula:

V₁＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*A；

the first minimum wind speed value is calculated according to the following formula:

V₂＝(RH_n_Ki*Drh_n+RH_n_Kp*Prh_n)*B；

wherein, Drh_n＝|Prh_n-Prh_n-1|，Prh_n＝|RH_n–RHm|，

V₁Is a first maximum wind speed value, V₂Is a first minimum wind speed value, RH _ Ki is a humidity deviation coefficient, RH _ Kp is a humidity difference coefficient, A is a first maximum wind speed coefficient, B is a first minimum wind speed coefficient, Drh_nDeviation value of humidity difference, Prh_nIs humidity ofDifference, RH_nRhm is the current humidity value and the set humidity value.

Further, determining a wind speed threshold corresponding to the frequency switching of the compressor according to the maximum wind speed value and the minimum wind speed value includes: calculating a first wind speed threshold value according to the following formula: v_rh＝(V₁+V₂) /2 wherein V_rhIs a first wind speed threshold.

Further, the maximum wind speed value and the minimum wind speed value of the wind speed variation form are determined according to the temperature difference between the current temperature value and the set temperature value, and the method comprises the following steps: determining a temperature deviation value of the temperature difference value and the first temperature difference value determined last time; and determining a second maximum wind speed value and a second minimum wind speed value according to the temperature deviation value.

Further, determining a second maximum wind speed value and a second minimum wind speed value according to the temperature deviation value includes:

the second maximum wind speed value is calculated according to the following formula:

V₃＝(T_Ki*Dt_n+T_Kp*Pt_n)*C；

the second minimum wind speed value is calculated according to the following formula:

V₄＝(T_Ki*Dt_n+T_Kp*Pt_n)*D；

wherein Dt is_n＝|Pt_n-Pt_n-1|，Pt_n＝|T_n–Tm|，

V₃Is the second maximum wind speed value, V₄Is a second minimum wind speed value, T _ Ki is a temperature deviation coefficient, T _ Kp is a temperature difference coefficient, C is a second maximum wind speed coefficient, D is a second minimum wind speed coefficient, Dt_nDeviation value of temperature difference, Pt_nFor temperature difference, T_nAnd the current temperature value is Tm is a set temperature value.

Further, determining a wind speed threshold corresponding to the frequency switching of the compressor according to the maximum wind speed value and the minimum wind speed value includes: the second wind speed threshold value is calculated according to the following formula: v_t＝(V₃+V₄) /2 wherein V_tIs a second wind speed threshold.

According to the second aspect of the present invention, there is also provided a device for controlling temperature and humidity of an air conditioner, the device comprising: the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current temperature value and the current humidity value of the space where the air conditioner is located; the air speed control unit is used for controlling a fan of the air conditioner to operate in a sine or cosine air speed change mode when the current temperature value is not in the target temperature range and the current humidity value is not in the target humidity range, wherein the maximum air speed value and the minimum air speed value in the air speed change mode are determined according to the temperature difference value between the current temperature value and the set temperature value or the humidity difference value between the current humidity value and the set humidity value; the first determining unit is used for determining a wind speed threshold value corresponding to the frequency switching of the compressor according to the maximum wind speed value and the minimum wind speed value; the frequency control unit is used for controlling the compressor to operate at a first frequency when the current wind speed of the fan is greater than a wind speed threshold value; and when the current wind speed value of the fan is smaller than the wind speed threshold value, controlling the compressor to operate at a second frequency, wherein the first frequency is smaller than the second frequency.

Further, the apparatus further includes a second determining unit, configured to: determining a humidity deviation value of the humidity difference value and the first humidity difference value determined last time; and determining a first maximum wind speed value and a first minimum wind speed value according to the humidity deviation value.

Further, the apparatus further includes a third determining unit, configured to: determining a temperature deviation value of the temperature difference value and the first temperature difference value determined last time; and determining a second maximum wind speed value and a second minimum wind speed value according to the temperature deviation value.

The method for double controlling the temperature and the humidity of the air conditioner can adjust the operation of the compressor and the fan according to the indoor environmental parameters such as the temperature, the humidity and the like, thereby achieving the purpose of controlling the indoor temperature and the humidity by controlling the operation frequency of the compressor and the fan, ensuring that the indoor temperature and the humidity can meet the requirement of the comfort level of a user and avoiding the influence of other environmental parameter fluctuation caused by adjusting a single indoor environmental parameter.

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 schematic illustration of a fan wind speed varying sinusoidally in accordance with an exemplary embodiment;

FIG. 2 is a schematic illustration of a fan wind speed varying in cosine according to an exemplary embodiment;

fig. 3 is a first flowchart illustrating a temperature and humidity dual control method of an air conditioner according to an exemplary embodiment of the present invention;

FIG. 4 is a flowchart illustrating a method for controlling temperature and humidity of an air conditioner according to an exemplary embodiment of the present invention;

fig. 5 is a flowchart illustrating a method for controlling temperature and humidity of an air conditioner according to an exemplary embodiment of the present invention;

FIG. 6 is a fourth flowchart illustrating a temperature and humidity dual control method of an air conditioner according to an exemplary embodiment of the present invention;

fig. 7 is a fifth flowchart illustrating a temperature and humidity dual control method of an air conditioner according to an exemplary embodiment of the present invention;

fig. 8 is a sixth flowchart illustrating an air conditioner temperature and humidity dual control method according to an exemplary embodiment of the present invention.

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. Other embodiments may incorporate structural, logical, electrical, process, and other changes. 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. Also, 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 or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.

The air conditioner is a common electric appliance in daily life, and can adjust the indoor temperature, namely, raise or lower the temperature, so that the indoor temperature is matched with the preset temperature of a user. However, in the process of temperature adjustment, the humidity of the indoor environment often changes, and if the temperature of the indoor environment is reduced by increasing the amount of refrigerant, the surface temperature of the indoor heat exchanger is reduced, which may result in an increase in the amount of water vapor condensed in the air flowing through the indoor heat exchanger, and thus, the humidity of the indoor environment may be reduced, and a user may often feel uncomfortable and dry. In a similar way, when adjusting indoor humidity through the air conditioner, also can lead to indoor environment temperature's change, if reduce indoor heat exchanger's surface temperature through the increase refrigerant volume, and then go into the in-process of dehumidification to indoor environment, because indoor heat exchanger's surface temperature reduces, then can lead to the temperature of the air that the indoor set of managing blew out to descend, like this, can make indoor environment temperature reduce, the user often can produce chilly sensation. Therefore, the existing air conditioner control method which only adjusts single parameters such as temperature or humidity cannot meet the requirement of user comfort.

The temperature and humidity double control method provided by the invention has the advantages that the change of the indoor environment temperature and humidity in the adjusting process is considered by adjusting the operation mode of the air conditioner, so that the temperature control effect of the air conditioner is ensured, and the function of controlling the humidity of the air conditioner is also added.

Specifically, when the air conditioner runs in a refrigeration mode, a heating mode or a dehumidification mode and the like, the quantity of the refrigerant input into the indoor heat exchanger can directly influence the refrigeration effect, the heating effect and the dehumidification effect, the quantity of the input refrigerant depends on the running frequency of the compressor, and when the running frequency of the compressor is higher, the quantity of the refrigerant discharged into a refrigerant circulating system of the air conditioner is larger, so that the quantity of the refrigerant flowing through the indoor heat exchanger is increased, and the effects of accelerating the refrigeration efficiency, the heating efficiency and the dehumidification efficiency can be further achieved; when the running frequency of the compressor is lower, the quantity of the refrigerant discharged into the air conditioner refrigerant circulating system is less, so that the quantity of the refrigerant flowing through the indoor heat exchanger is reduced, and the effects of delaying the processes of refrigeration, heating and dehumidification can be further achieved.

Therefore, the control of the amount of the refrigerant input into the indoor heat exchanger can be realized by adjusting the operating frequency of the compressor, and the purposes of adjusting the refrigeration, heating and dehumidification effects are further achieved. For example, in a high-temperature working condition in summer, the air conditioner generally operates in a refrigeration mode, and when the indoor environment temperature is higher, the refrigeration efficiency of the refrigeration mode can be accelerated by improving the operating frequency of the compressor, so that the indoor environment temperature can be reduced to a more appropriate temperature condition; or, in the low temperature working condition in winter, the air conditioner generally operates in the heating mode, when the indoor environment temperature is lower, the heating efficiency of the heating mode can be accelerated by improving the operating frequency of the compressor, so that the indoor environment temperature can be improved to a more appropriate temperature condition; or, under the high-humidity working condition in summer, the air conditioner can be switched from the refrigeration mode to the dehumidification mode for operation, and the surface temperature of the indoor heat exchanger can be reduced to a lower temperature level by improving the operating frequency of the compressor, so that the water vapor in the indoor air flowing through the indoor unit can be condensed into dew on the surface of the outdoor heat exchanger, the water vapor content of the indoor air is reduced, and the indoor environment humidity is gradually reduced to a more appropriate humidity condition.

When the indoor environment temperature approaches to the temperature value set by the user, the operation frequency position of the air conditioner compressor can be controlled to be at a proper or lower frequency value, so that the aim of maintaining the indoor environment temperature to be stable can be fulfilled; similarly, when the indoor environment humidity approaches the humidity value set by the user, the operation frequency position of the air conditioner compressor can be controlled to be a proper or lower frequency value, and the effect of maintaining the indoor environment temperature stable can be achieved.

For the adjustment of the running frequency of the compressor, taking the working condition in summer as an example, the invention combines the operation frequency with the change of the rotating speed of the indoor fan, wherein the wind speed of the indoor fan changes according to the alternating form of high wind and low wind, and the air supply effect of natural wind can be simulated, so that the use experience and the air supply experience of a user are improved; meanwhile, when the indoor fan runs at high wind, the running frequency of the compressor is controlled to run at a lower frequency, so that the problem of overcooling of outlet air temperature caused by too low temperature of the indoor heat exchanger is avoided, the supply air temperature sensed by a user can be maintained at a proper temperature level, and the user is prevented from feeling uncomfortable; when the indoor fan operates at low wind, the operation frequency of the compressor is controlled to operate at a higher frequency, so that the amount of refrigerant conveyed to the indoor unit can be increased, the temperature of the indoor heat exchanger is reduced, the condensation amount of dew flowing through the indoor heat exchanger is increased, the purpose of dehumidifying the indoor environment is achieved, and the humidity of the indoor environment is maintained at a proper humidity condition.

In an embodiment, after the user sets the desired indoor temperature, the user feels comfortable in a temperature range and a humidity range corresponding to the preset temperature, that is, a temperature and humidity range, where the user feels comfortable, and here, the target temperature and humidity range corresponds to a comfortable level set by the human body, for example, the temperature and humidity range corresponding to the most comfortable feeling of the human body is the target temperature range and the target humidity range.

Here, the corresponding relationship between the set temperature and the target temperature range and the target humidity range may be stored in advance, that is, for each preset temperature, a plurality of human bodies may be tested to obtain the most comfortable temperature and humidity of the corresponding human body, and in the set region of the preset temperature, a first temperature and humidity corresponding to the set somatosensory comfort level of the plurality of human body collected samples is obtained, and according to the first temperature and humidity, the target temperature and humidity range corresponding to the preset temperature is determined, and the corresponding relationship is stored. For example: the set temperature is 25 degrees, at the moment, the first temperature range is 23.5 degrees to 27 degrees, and the first humidity range is 40 percent to 60 percent of relative humidity, most users feel the most comfortable, therefore, a plurality of first integrated temperature-sensing humidities are contained in the ranges of 23.5 degrees to 27 degrees and 40 percent to 60 percent of relative humidity, the temperature of 23.5 degrees to 27 degrees and the humidity of 40 percent to 60 percent can be determined to be the target temperature and humidity range corresponding to the set temperature, and the corresponding relation between the preset temperature of 25 degrees and the target temperature and humidity of 23.5 degrees to 27 degrees and the humidity of 40 percent to 60 percent is stored.

Thus, the corresponding relationship between the stored preset temperature and the target temperature and humidity range can be as shown in table 1:

TABLE 1

Here, the target temperature and humidity range corresponding to the current set temperature of the air conditioner may be determined according to a correspondence between the stored preset temperature and the target temperature and humidity range. As shown in table 1, when the current preset temperature is 26 °, the obtained target temperature and humidity range is 25-28.5 ° and the humidity is 30% -60%.

Therefore, when the air conditioner is started to operate, a user inputs the set indoor temperature through a remote controller or a display panel, and the target temperature range and the target humidity range corresponding to the set indoor temperature can be determined; comparing the current indoor temperature and the current indoor humidity with the target temperature range and the target humidity range, and if the current indoor temperature is in the target temperature range and the current indoor humidity is in the target temperature range, controlling the air conditioner to maintain the current running state unchanged; if the current indoor temperature is not in the target temperature range and the indoor humidity is not in the target temperature range, the operating state of the air conditioner needs to be controlled to adjust the indoor temperature and the indoor humidity until the indoor temperature is in the target temperature range and the indoor humidity is in the target temperature range.

In one embodiment, when the current indoor temperature is not within the target temperature range and the current indoor humidity is not within the target temperature range, the method controls the fan to operate in a sine or approximate-sine wind speed change mode, and the wind speed change of the fan is periodically increased or decreased, so that the stability of the wind speed change of the fan can be ensured, the wind speed of the wind outlet flow of the air conditioner is more stable and relaxed, and the wind supply effect of natural wind is created for users.

For example, fig. 1 is a schematic diagram illustrating that the wind speed of the fan varies in a sinusoidal manner according to an exemplary embodiment, in which the wind speed of the indoor fan of the air conditioner varies in a sinusoidal manner, the wind speed of the indoor fan gradually increases from the middle wind speed value Vmid to the maximum wind speed value Vmax in the time period t1-t2, the wind speed of the indoor fan gradually decreases from the maximum wind speed value Vmax to the minimum wind speed value Vmin in the time period t2-t3, and the wind speed of the indoor fan gradually increases from the minimum wind speed value Vmin to the middle wind speed value Vmin the time period t3-t4, so that t1-t4 may constitute a complete period of the variation of the wind speed of the fan. The indoor fan may periodically adjust a wind speed variation of the fan in the form of the wind speed variation before the air conditioner adjusts the current indoor temperature to the target temperature range and the current indoor humidity to the target humidity range.

Or, in another embodiment, when the current indoor temperature is not in the target temperature range and the current indoor humidity is not in the target temperature range, the present invention controls the fan to operate in a cosine or approximately cosine wind speed variation form, similar to the sine or approximately sine wind speed variation form in the foregoing embodiment, the wind speed variation of the indoor fan is also periodically increased or decreased, and the wind supply effect of natural wind can also be created for the user.

For example, fig. 2 is a schematic diagram illustrating that the wind speed of the fan varies in a cosine form according to an exemplary embodiment, in which the wind speed of the indoor fan of the air conditioner varies in a sine manner, and the wind speed of the indoor fan gradually decreases from the maximum wind speed value Vmax to the minimum wind speed value Vmin during a period t1-t2, and gradually increases from the minimum wind speed value Vmax to the maximum wind speed value Vmax during a period t2-t3, and t1-t3 constitutes a complete period of the variation of the wind speed of the fan. The indoor fan may periodically adjust a wind speed variation of the fan in the form of the wind speed variation before the air conditioner adjusts the current indoor temperature to the target temperature range and the current indoor humidity to the target humidity range.

Therefore, the air conditioner may have the wind speed variation of sine or cosine in the foregoing embodiment. During the actual operation of the air conditioner, one of the sine and the cosine in the foregoing embodiments may be selected to adjust the wind speed variation of the fan.

In one embodiment, the variation period of the wind speed variation form is calculated according to the humidity difference value between the current humidity value and the set humidity value. Specifically, calculating a humidity deviation value of the determined humidity difference value and the first humidity difference value determined last time; and then, determining the period duration of the change period according to the humidity deviation value.

In this embodiment, the air speed adjustment process of the air-conditioning indoor fan is performed periodically for multiple times, so that in each periodic process, the current humidity difference of the current periodic process can be calculated and determined, that is, the humidity difference between the current indoor humidity acquired in the current period and the humidity value set by the user can be calculated and obtained in each period; in order to improve the accuracy of controlling the wind speed of the fan, the temperature and humidity double control method needs to determine the humidity difference value of the current period process and the humidity difference value determined in the previous period process in advance before determining the change period of the rotating speed of the fan.

That is, before the current humidity value of the indoor environment reaches the set humidity value, the air conditioner needs to repeatedly execute the process in the foregoing embodiment m times, taking the nth time as an example, before determining the change period of the fan in the nth period process, the current humidity difference determined in the (n-1) th period process needs to be predetermined; the current temperature difference of the (n-1) th time is the difference between the current humidity value obtained in the periodic process of the (n-1) th time and the set humidity value.

For example, taking the refrigeration process of the high-temperature working condition in summer as an example, in the continuous flow of two cycles, because the air-conditioning refrigeration mode is continuously operated, the current humidity value detected in the three cycles is gradually decreased, for example, the humidity value at the n-1 th time is 70% of the relative humidity, the humidity value at the n-1 th time is 65% of the relative humidity, the set humidity value of the air conditioner is 55% of the relative humidity, the humidity difference value at the n-1 th time is 15%, and the humidity difference value at the n-1 th time is 10%.

Thus, the humidity deviation value between the current humidity difference value and the first humidity difference value determined last time, that is, the humidity deviation value between the current humidity difference value of the current cycle flow and the current humidity difference value of the previous cycle flow, may be further determined, for example, the present invention uses the nth time as the current cycle flow, and then the humidity deviation value may be determined to be 15% to 10% to 5% according to the current humidity difference values of the nth time and the n-1 th time calculated in the foregoing embodiment.

It should be understood that, in order to distinguish the current humidity difference values in the different cycle flows, the present invention defines the current humidity difference value in the cycle flow of the (n-1) th time in the foregoing embodiment as the first humidity difference value.

Preferably, the relevant process steps for determining the change period of the wind speed change form of the fan according to the humidity difference value are performed in the period of n > 1 times, and because the time of each period is short, the changes of the indoor temperature and humidity and the outlet air temperature of 2 periods before the air conditioner is started to operate are small, so that the process steps of the invention mainly aim at the period process of n > 2 times and the subsequent period process thereof.

Preferably, for ease of calculation, the humidity deviation value determined by the present invention is the absolute value of the value.

Thus, according to the humidity deviation value, the period duration of the change period can be determined.

Specifically, the period duration of the variation period is calculated according to the following formula:

L＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*E；

wherein, Drh_n＝|Prh_n-Prh_n-1|，Prh_n＝|RH_n–RHm|，

L is the cycle duration of the variation cycle, RH _ Ki is the humidity deviation coefficient, RH _ Kp is the humidity difference coefficient, E is the first cycle calculation coefficient, Drh_nDeviation value of humidity difference, Prh_nFor difference in humidity, RH_nRhm is the current humidity value and the set humidity value.

For example, in one embodiment, the humidity deviation coefficient RH _ Ki is 3, the humidity difference coefficient RH _ Kp is 5, the first period calculation coefficient E is 5, and Drh is calculated_nIs 5, Prh_nAt 20, the cycle duration L ═ (5 × 3+20 × 5) × 5 ═ 9.6 min.

According to the invention, the wind speed change form of the fan is divided into a high wind speed area and a low wind speed area through a wind speed threshold, namely, when the current wind speed of the fan is greater than the wind speed threshold, the wind speed of the fan is in the high wind speed area; and when the current wind speed of the fan is smaller than the wind speed threshold, the wind speed of the fan is in a low wind speed area. Generally, because the fan adopts a sine or cosine wind speed change form, the fan is in the high wind speed area and the low wind speed area for the same time duration, namely, the change period is 1/2. Therefore, after the period duration L is obtained through calculation, the durations of the fan in the high wind speed area and the low wind speed area can be determined, and the durations of the high wind speed area and the low wind speed area are both 4.8min in the embodiment.

In the practical application of the air conditioner, the RH _ Ki, the RH _ Kp and the E are calculation coefficients which are stored in the air conditioner in advance, and the calculation coefficients can be obtained by summarizing debugging data of a large number of simulation experiments before air conditioner products leave a factory.

In another embodiment, the variation period of the wind speed variation is calculated according to the humidity difference between the current humidity value and the set humidity value. Specifically, calculating a humidity deviation value of the determined humidity difference value and the first humidity difference value determined last time; and then, according to the humidity deviation value, determining the period duration of the high-frequency stage corresponding to the operation of the compressor at the second frequency.

Here, also in the case of the nth control flow in the foregoing embodiment, the current humidity difference in the (n-1) th cycle flow is defined as the first humidity difference.

In this embodiment, when the fan is in the high-speed wind zone, the compressor operates at the first frequency with a lower frequency, so that the outlet air temperature is not too low; and when the fan is in the low wind speed zone, the compressor operates at the second frequency with higher frequency, at this moment, the indoor unit can carry out dehumidification operation to the indoor environment, consequently, in order to improve dehumidification efficiency, guarantee the dehumidification effect, can confirm that the compressor is long with the cycle of the high frequency stage that the second frequency operation corresponds to according to the humidity deviation value to guarantee to be used for carrying out the time length of the high frequency stage of dehumidification to the indoor environment can satisfy the time demand of dehumidification operation.

Specifically, the period duration of the variation period is calculated according to the following formula:

L₁＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*F；

wherein, Drh_n＝|Prh_n-Prh_n-1|，Pt_n＝|RH_n–RHm|，

L₁RH _ Ki is a humidity deviation coefficient, RH _ Kp is a humidity difference coefficient, F is a second period calculation coefficient, Drh_nDeviation value of humidity difference, Prh_nFor difference in humidity, RH_nAs the current humidity value, RHm is the set humidity value.

For example, in one embodiment, the humidity deviation coefficient RH _ Ki is 3, the humidity difference coefficient RH _ Kp is 5, the first period calculation coefficient E is 5, and Drh is calculated_nIs 5, Prh_n20, the period duration L of the high frequency phase₁＝(5*3+20*5)*5＝9.6min。

In this embodiment, the period duration of the high-frequency phase is calculated by using the above calculation formula, and the period duration of the low-frequency phase is calculated by using a preset fixed duration, so that the period duration of the variation period is calculated by using the following formula:

L＝L₁+L₂wherein, L is the period duration of the variation period.

For example, the preset period duration of the low-frequency stage of the air conditioner is 5min, the calculated period duration of the high-frequency stage in the process is 9.6min, and the total period duration L of the variation period is L₁+L₂＝9.6min+5min＝14.6min。

Or, in another embodiment, the cycle durations of the high-frequency stage and the low-frequency stage both adopt preset fixed durations, and then the total cycle duration of the change cycle is the sum of the two fixed durations. In this embodiment, the period duration of the high frequency phase and the period duration of the low frequency phase may be the same or may not be the same.

In addition, in an embodiment, in the case that a fan of the indoor unit of the air conditioner changes in a sine or cosine manner, the maximum wind speed value and the minimum wind speed value in the form of wind speed change are determined according to a humidity difference value between the current humidity value and the set humidity value. Specifically, calculating a humidity deviation value of the determined humidity difference value and the first humidity difference value determined last time; and then, determining a first maximum wind speed value and a first minimum wind speed value according to the humidity deviation value.

Here, also in the case of the nth control flow in the foregoing embodiment, the current humidity difference in the (n-1) th cycle flow is defined as the first humidity difference.

In the present embodiment, the first maximum wind speed value is calculated according to the following formula:

V₁＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*A；

wherein, Drh_n＝|Prh_n-Prh_n-1|，Prh_n＝|RH_n–RHm|，

V₁Is a first maximum wind speed value, RH _ Ki is a humidity deviation coefficient, RH _ Kp is a humidity difference coefficient, A is a first maximum wind speed coefficient, Drh_nDeviation value of humidity difference, Prh_nFor difference in humidity, RH_nRhm is the current humidity value and the set humidity value.

For example, in the present embodiment, the humidity deviation coefficient RH _ Ki is 3, the humidity difference coefficient RH _ Kp is 4, the first maximum wind speed coefficient a is 10, and Drh calculated by the calculation is obtained_nIs 5, Prh_n20, the first maximum wind speed value V₁＝(5*3+20*4)*10＝950rpm。

The second minimum wind speed value is calculated according to the following formula:

V₂＝(RH_n_Ki*Drh_n+RH_n_Kp*Prh_n)*B；

wherein, Drh_n＝|Prh_n-Prh_n-1|，Prh_n＝|RH_n–RHm|，

V₂For the first minimum wind speed value, RH _ Ki is the humidity deviation coefficient, RH _ Kp is the humidity difference coefficient, B is the first minimum wind speed coefficient, Drh_nDeviation value of humidity difference, Prh_nFor difference in humidity, RH_nRhm is the current humidity value and the set humidity value.

For example, in the present embodiment, the humidity deviation coefficient RH _ Ki is 3, the humidity difference coefficient RH _ Kp is 4, the first minimum wind speed coefficient B is 6, and Drh calculated by the calculation is obtained_nIs 5, Prh_n20, the first minimum wind speed value V₂＝(5*3+20*4)*6＝570rpm。

In the practical application of the air conditioner, the RH _ Ki, the RH _ Kp, the A and the B are calculation coefficients which are stored in the air conditioner in advance, and the calculation coefficients can be obtained by summarizing debugging data of a large number of simulation experiments before air conditioner products leave a factory.

In another embodiment, under the condition that a fan of the indoor unit of the air conditioner changes in a sine or cosine mode, the maximum wind speed value and the minimum wind speed value in the wind speed change mode are determined according to the temperature difference value between the current temperature value and the set temperature value. Specifically, calculating a humidity deviation value of the determined temperature difference value and the first temperature difference value determined last time; and then, determining a second maximum wind speed value and a second minimum wind speed value according to the temperature deviation value.

Here, also in the aforementioned embodiment, the nth control flow is taken as an example, and the current temperature difference value in the n-1 st cycle flow is defined as the first temperature difference value. The determining process may refer to the related process of the humidity parameter in the foregoing embodiment, which is not described herein again.

In this embodiment, the second maximum wind speed value is calculated according to the following formula:

V₃＝(T_Ki*Dt_n+T_Kp*Pt_n)*C；

wherein Dt is_n＝|Pt_n-Pt_n-1|，Pt_n＝|T_n–Tm|，

V₃Is the second maximum wind speed value, T _ Ki is the temperature deviation coefficient, T _ Kp is the temperature difference coefficient, C is the second maximum wind speed coefficient, Dt_nDeviation value of temperature difference, Pt_nFor temperature difference, T_nAnd the current temperature value is Tm is a set temperature value.

For example, in the present embodiment, the temperature deviation coefficient T _ Ki is 3, the temperature difference coefficient T _ Kp is 4, the second maximum wind speed coefficient C is 10, and Dt is calculated_nIs 5, Pt_n20, the second maximum wind speed value V₃＝(5*3+20*4)*10＝950rpm。

The second minimum wind speed value is calculated according to the following formula:

V₄＝(T_Ki*Dt_n+T_Kp*Pt_n)*C；

wherein Dt is_n＝|Pt_n-Pt_n-1|，Pt_n＝|T_n–Tm|，

V₄Is a second minimum wind speed value, T _ Ki is a temperature deviation coefficient, T _ Kp is a temperature difference coefficient, D is a second minimum wind speed coefficient, Dt_nDeviation value of temperature difference, Pt_nAs a difference in temperature，T_nAnd the current temperature value is Tm is a set temperature value.

For example, in the present embodiment, the temperature deviation coefficient T _ Ki is 3, the temperature difference coefficient RH _ Kp is 4, the second minimum wind speed coefficient D is 6, and Dt is calculated_nIs 5, Pt_n20, the second minimum wind speed value V₄＝(5*3+20*4)*6＝570rpm。

In the practical application of the air conditioner, the RH _ Ki, the RH _ Kp, the A and the B are calculation coefficients which are stored in the air conditioner in advance, and the calculation coefficients can be obtained by summarizing debugging data of a large number of simulation experiments before air conditioner products leave a factory.

Alternatively, in another embodiment, the maximum wind speed value and the minimum wind speed value of the wind speed variation form are combined by a preset fixed wind speed value. The air conditioner carries out fan value combination selected and adapted according to different set temperature and set humidity, and controls the fan to change the air speed in a sine or cosine mode, wherein the maximum air speed value and the minimum air speed value of the air conditioner correspond to the preset value of the selected fan value combination.

Therefore, after the maximum wind speed value and the minimum wind speed value are determined, the wind speed threshold value corresponding to the frequency switching of the compressor can be further determined, and therefore the high-frequency stage and the low-frequency stage of the compressor when the compressor runs at different frequencies are divided.

Specifically, the wind speed threshold may be calculated according to the following formula:

V_mid＝(V_max+V_min)/2，

wherein, V_midIs the wind speed threshold, V_maxIs the maximum wind speed value, V_minIs the minimum wind speed value.

Therefore, when the current wind speed value of the air-conditioning fan is greater than or equal to the wind speed threshold value V_midWhen the air conditioner is in use, the air conditioner can be controlled to operate at a low-frequency wind speed, so that air supply or refrigeration operation can be performed indoors; when the current wind speed value of the air-conditioning fan is smaller than the wind speed threshold value V_maxIn time, the air conditioner can be controlled to operate at a high-frequency wind speed, so that dehumidification operation is performed indoors.

The following describes the specific process of the temperature and humidity control of the air conditioner in detail with reference to specific application examples.

Fig. 3 is a first flowchart of a method for controlling temperature and humidity according to an exemplary embodiment of the present invention, in an application scenario shown in fig. 3, taking a summer working condition as an example, a wind speed variation form adopts a sine or cosine manner, a variation period is a preset fixed period, and a maximum wind speed value and a minimum wind speed value are preset fixed wind speed values; specifically, the control flow comprises the following specific steps:

s301, the air conditioner is in a refrigeration mode;

generally, in summer working conditions, an air conditioner operates in a refrigeration mode, and a user can input an expected indoor temperature through a remote controller or a control panel, namely, the operation mode of a fan and the operation frequency of a compressor are controlled in the process that the current indoor temperature and the current indoor humidity of the air conditioner are adjusted to the expected values;

optionally, when the indoor environment reaches the expected value set by the user, the temperature and humidity double control process of the present invention may be continuously adopted to maintain the stability of the indoor temperature and humidity conditions.

S302, acquiring a set temperature of a user;

in the present embodiment, the air conditioner is preset with the association relationship between the set temperature and the target temperature range and the target humidity range, for example, the association table between the set temperature and the target temperature range and the target humidity range. Therefore, after the set temperature of the user is obtained, the target temperature range and the target humidity range corresponding to the set temperature can be determined according to the association relationship, and the user feels comfortable under the condition that the indoor temperature is in the target temperature range and the indoor humidity is in the target humidity range, so that the temperature and humidity dual-control process adjusts and maintains the current temperature and humidity of the indoor environment in the target temperature and humidity range;

in this embodiment, the user can also set a desired indoor humidity through a remote controller or a control panel; or, the air conditioner is preset with the association relationship between the set temperature and the set humidity, so that the user can determine the corresponding set humidity or temperature according to the association relationship by only setting the temperature or humidity as a parameter.

S303, acquiring a current temperature value and a current humidity value of a space where the air conditioner is located;

in this embodiment, the air conditioner is provided with a temperature sensor and a humidity sensor, which can be respectively used for detecting the real-time temperature and the real-time humidity of the space where the air conditioner is located, and the real-time temperature can be used as the current temperature value of the process of the current cycle, and the real-time humidity can be used as the current humidity value of the process of the current cycle;

s304, judging whether the current temperature value is in a target temperature range and the current humidity value is in a target humidity range, if so, executing a step S305, and if not, executing a step S306;

in this embodiment, the target temperature range is determined according to the association relationship between the set temperature input by the user and the air conditioner preset.

S305, controlling a compressor of the air conditioner to keep the current running frequency, and keeping the current wind speed by a fan;

in this embodiment, when the current temperature value is within the target temperature range and the current humidity value is within the target humidity range, it can be determined that the current indoor temperature and humidity are appropriate, and the temperature and humidity requirements of the user are met, so that the current operating state of the air conditioner can be maintained unchanged;

s306, controlling a fan of the air conditioner to operate in a sine wind speed change mode;

in an embodiment, the fan of the air conditioner may also be operated in a cosine wind speed variation form.

In this embodiment, in the process that the air conditioner operates in a sine or cosine wind speed change form, the change period adopts a period duration preset by the air conditioner, and the maximum wind speed value and the minimum wind speed value are also the maximum wind speed value and the minimum wind speed value preset by the air conditioner;

s307, calculating and determining a wind speed threshold according to a preset maximum wind speed value and a preset minimum wind speed value;

in the present embodiment, the wind speed threshold value can be calculated according to the following formula:

V_mid＝(V_max+V_min)/2，

wherein, V_midIs the wind speed threshold, V_maxIs the maximum wind speed value, V_minIs the minimum wind speed value.

S308, judging whether the current wind speed value of the fan is larger than or equal to a wind speed threshold value, if so, executing the step S309, and if not, executing the step S310.

S309, controlling the compressor to be switched to a first frequency for operation;

in this embodiment, the first frequency is a preset operation frequency value with a smaller value.

S310, controlling the compressor to be switched to a second frequency for operation;

in this embodiment, the second frequency is a preset operation frequency value with a larger value.

Fig. 4 is a flowchart of a second method for controlling temperature and humidity according to an exemplary embodiment of the present invention, in an application scenario shown in fig. 4, taking a summer working condition as an example, a wind speed variation form adopts a sine or cosine manner, a variation period is calculated from a humidity difference, and a maximum wind speed value and a minimum wind speed value are preset fixed wind speed values; specifically, the control flow comprises the following specific steps:

s401, enabling an air conditioner to be in a refrigeration mode;

generally, in summer working conditions, an air conditioner operates in a refrigeration mode, and a user can input an expected indoor temperature through a remote controller or a control panel, namely, the operation mode of a fan and the operation frequency of a compressor are controlled in the process that the current indoor temperature and the current indoor humidity of the air conditioner are adjusted to the expected values;

optionally, when the indoor environment reaches the expected value set by the user, the temperature and humidity double control process of the present invention may be continuously adopted to maintain the stability of the indoor temperature and humidity conditions.

S402, acquiring a set temperature of a user;

in the present embodiment, the air conditioner is preset with the association relationship between the set temperature and the target temperature range and the target humidity range, for example, the association table between the set temperature and the target temperature range and the target humidity range. Therefore, after the set temperature of the user is obtained, the target temperature range and the target humidity range corresponding to the set temperature can be determined according to the association relationship, and the user feels comfortable under the condition that the indoor temperature is in the target temperature range and the indoor humidity is in the target humidity range, so that the temperature and humidity dual-control process adjusts and maintains the current temperature and humidity of the indoor environment in the target temperature and humidity range;

in this embodiment, the user can also set a desired indoor humidity through a remote controller or a control panel; or, the air conditioner is preset with the association relationship between the set temperature and the set humidity, so that the user can determine the corresponding set humidity or temperature according to the association relationship by only setting the temperature or humidity as a parameter.

S403, acquiring a current temperature value and a current humidity value of a space where the air conditioner is located;

in this embodiment, the air conditioner is provided with a temperature sensor and a humidity sensor, which can be respectively used for detecting the real-time temperature and the real-time humidity of the space where the air conditioner is located, and the real-time temperature can be used as the current temperature value of the process of the current cycle, and the real-time humidity can be used as the current humidity value of the process of the current cycle;

s404, judging whether the current temperature value is in a target temperature range and the current humidity value is in a target humidity range, if so, executing a step S405, and if not, executing a step S406;

in this embodiment, the target temperature range is determined according to the association relationship between the set temperature input by the user and the air conditioner preset.

S405, controlling a compressor of the air conditioner to keep the current running frequency, and keeping the current wind speed by a fan;

in this embodiment, when the current temperature value is within the target temperature range and the current humidity value is within the target humidity range, it can be determined that the current indoor temperature and humidity are appropriate, and the temperature and humidity requirements of the user are met, so that the current operating state of the air conditioner can be maintained unchanged;

s406, acquiring a first humidity difference determined in the last cycle flow;

in this embodiment, assuming that the current process is the nth control process, the first humidity difference is the humidity difference between the current humidity value calculated in the nth-1 control process and the set humidity value, that is, Prh_n-1＝|RH_n-1Rhm |, wherein RH_n-1The current humidity value detected in the (n-1) th control process is Rhm which is a set humidity value.

S407, calculating and determining a humidity deviation value of the humidity difference value and the first humidity difference value;

in this embodiment, the humidity difference is the humidity difference between the current humidity value calculated in the current process and the set humidity value, that is, Prh_n＝|RH_nRhm |, wherein RH_n-1The current humidity value detected in the (n-1) th control process is Rhm which is a set humidity value.

Humidity deviation value of Drh_n＝|Prh_n-Prh_n-1|；

S408, calculating and determining the period duration of the change period of the wind speed change form;

in this embodiment, the period duration of the variation period is calculated according to the following formula:

L＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*E；

wherein L is the cycle duration of the variation cycle, RH _ Ki is the humidity deviation coefficient, RH _ Kp is the humidity difference coefficient, E is the first cycle calculation coefficient, Drh_nDeviation value of humidity difference, Prh_nFor difference in humidity, RH_nRhm is the current humidity value and the set humidity value.

S409, controlling a fan of the air conditioner to operate in a sine wind speed change mode;

in an embodiment, the fan of the air conditioner may also be operated in a cosine wind speed variation form.

In this embodiment, in the process that the air conditioner operates in the sine or cosine wind speed variation form, the variation period adopts the period duration calculated and determined in step S408, and the maximum wind speed value and the minimum wind speed value adopt the maximum wind speed value and the minimum wind speed value preset by the air conditioner;

s410, calculating and determining a wind speed threshold value according to a preset maximum wind speed value and a preset minimum wind speed value;

in the present embodiment, the wind speed threshold value can be calculated according to the following formula:

V_mid＝(V_max+V_min)/2，

wherein, V_midIs the wind speed threshold, V_maxIs the maximum wind speed value, V_minIs the minimum wind speed value.

S411, judging whether the current wind speed value of the fan is larger than or equal to a wind speed threshold value, if so, executing a step S412, and if not, executing a step S413.

S412, controlling the compressor to be switched to a first frequency for operation;

in this embodiment, the first frequency is a preset operation frequency value with a smaller value.

S413, controlling the compressor to be switched to a second frequency for operation;

in this embodiment, the second frequency is a preset operation frequency value with a larger value.

Fig. 5 is a third flowchart of the method for controlling temperature and humidity according to an exemplary embodiment of the present invention, in the application scenario shown in fig. 5, taking a summer working condition as an example, a wind speed variation form adopts a sine or cosine manner, a low wind speed area (i.e. a high frequency stage of a compressor) of a variation cycle is calculated from a humidity difference, and a maximum wind speed value and a minimum wind speed value are preset fixed wind speed values; specifically, the control flow comprises the following specific steps:

s501, enabling an air conditioner to be in a refrigeration mode;

generally, in summer working conditions, an air conditioner operates in a refrigeration mode, and a user can input an expected indoor temperature through a remote controller or a control panel, namely, the operation mode of a fan and the operation frequency of a compressor are controlled in the process that the current indoor temperature and the current indoor humidity of the air conditioner are adjusted to the expected values;

optionally, when the indoor environment reaches the expected value set by the user, the temperature and humidity double control process of the present invention may be continuously adopted to maintain the stability of the indoor temperature and humidity conditions.

S502, acquiring a set temperature of a user;

in the present embodiment, the air conditioner is preset with the association relationship between the set temperature and the target temperature range and the target humidity range, for example, the association table between the set temperature and the target temperature range and the target humidity range. Therefore, after the set temperature of the user is obtained, the target temperature range and the target humidity range corresponding to the set temperature can be determined according to the association relationship, and the user feels comfortable under the condition that the indoor temperature is in the target temperature range and the indoor humidity is in the target humidity range, so that the temperature and humidity dual-control process adjusts and maintains the current temperature and humidity of the indoor environment in the target temperature and humidity range;

in this embodiment, the user can also set a desired indoor humidity through a remote controller or a control panel; or, the air conditioner is preset with the association relationship between the set temperature and the set humidity, so that the user can determine the corresponding set humidity or temperature according to the association relationship by only setting the temperature or humidity as a parameter.

S503, acquiring a current temperature value and a current humidity value of a space where the air conditioner is located;

in this embodiment, the air conditioner is provided with a temperature sensor and a humidity sensor, which can be respectively used for detecting the real-time temperature and the real-time humidity of the space where the air conditioner is located, and the real-time temperature can be used as the current temperature value of the process of the current cycle, and the real-time humidity can be used as the current humidity value of the process of the current cycle;

s504, judging whether the current temperature value is in a target temperature range and whether the current humidity value is in a target humidity range, if so, executing a step S505, and if not, executing a step S506;

in this embodiment, the target temperature range is determined according to the association relationship between the set temperature input by the user and the air conditioner preset.

S505, controlling a compressor of the air conditioner to keep the current running frequency, and keeping the current wind speed by a fan;

in this embodiment, when the current temperature value is within the target temperature range and the current humidity value is within the target humidity range, it can be determined that the current indoor temperature and humidity are appropriate, and the temperature and humidity requirements of the user are met, so that the current operating state of the air conditioner can be maintained unchanged;

s506, acquiring a first humidity difference determined in the last cycle flow;

in this embodiment, assuming that the current process is the nth control process, the first humidity difference is the humidity difference between the current humidity value calculated in the nth-1 control process and the set humidity value, that is, Prh_n-1＝|RH_n-1Rhm |, wherein RH_n-1The current humidity value detected in the (n-1) th control process is Rhm which is a set humidity value.

S507, calculating and determining a humidity deviation value between the humidity difference value and the first humidity difference value;

in this embodiment, the humidity difference is the humidity difference between the current humidity value calculated in the current process and the set humidity value, that is, Prh_n＝|RH_nRhm |, wherein RH_n-1The current humidity value detected in the (n-1) th control process is Rhm which is a set humidity value.

Humidity deviation value of Drh_n＝|Prh_n-Prh_n-1|；

S508, calculating and determining the period duration of a low wind speed area corresponding to the high-frequency stage of the compressor;

in the present embodiment, the period duration of the low wind speed region is calculated according to the following formula:

L₁＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*E；

wherein L is₁The period duration of the low wind speed region, RH _ Ki is the humidity deviation coefficient, RH _ Kp is the humidity difference coefficient, F is the second period calculation coefficient, Drh_nDeviation value of humidity difference, Prh_nFor difference in humidity, RH_nRhm is the current humidity value and the set humidity value.

S509, calculating and determining the period duration of the change period;

in this embodiment, the period duration of the high wind speed region of the fan corresponding to the low frequency stage of the compressor is a preset fixed duration, and therefore, the period duration of the variation period is the sum of the period duration calculated in step S507 and the period duration of the high wind speed region.

S510, controlling a fan of the air conditioner to operate in a sine wind speed change mode;

in an embodiment, the fan of the air conditioner may also be operated in a cosine wind speed variation form.

In this embodiment, in the process that the air conditioner operates in the sine or cosine wind speed variation form, the variation period adopts the period duration calculated and determined in step S509, and the maximum wind speed value and the minimum wind speed value adopt the maximum wind speed value and the minimum wind speed value preset by the air conditioner;

s511, calculating and determining a wind speed threshold value according to a preset maximum wind speed value and a preset minimum wind speed value;

in the present embodiment, the wind speed threshold value can be calculated according to the following formula:

V_mid＝(V_max+V_min)/2，

wherein, V_midIs the wind speed threshold, V_maxIs the maximum wind speed value, V_minIs the minimum wind speed value.

S512, judging whether the current wind speed value of the fan is larger than or equal to a wind speed threshold value, if so, executing a step S513, and if not, executing a step S514.

S513, controlling the compressor to be switched to a first frequency for operation;

in this embodiment, the first frequency is a preset operation frequency value with a smaller value.

S514, controlling the compressor to be switched to a second frequency for operation;

in this embodiment, the second frequency is a preset operation frequency value with a larger value.

Fig. 6 is a fourth flowchart of a method for dual temperature and humidity control according to an exemplary embodiment of the present invention, in an application scenario shown in fig. 6, taking a summer working condition as an example, a wind speed variation form adopts a sine or cosine manner, a variation period adopts a fixed period duration preset by an air conditioner, and a maximum wind speed value and a minimum wind speed value are calculated from a humidity difference value; specifically, the control flow comprises the following specific steps:

s601, enabling an air conditioner to be in a refrigeration mode;

generally, in summer working conditions, an air conditioner operates in a refrigeration mode, and a user can input an expected indoor temperature through a remote controller or a control panel, namely, the operation mode of a fan and the operation frequency of a compressor are controlled in the process that the current indoor temperature and the current indoor humidity of the air conditioner are adjusted to the expected values;

optionally, when the indoor environment reaches the expected value set by the user, the temperature and humidity double control process of the present invention may be continuously adopted to maintain the stability of the indoor temperature and humidity conditions.

S602, acquiring a set temperature of a user;

in the present embodiment, the air conditioner is preset with the association relationship between the set temperature and the target temperature range and the target humidity range, for example, the association table between the set temperature and the target temperature range and the target humidity range. Therefore, after the set temperature of the user is obtained, the target temperature range and the target humidity range corresponding to the set temperature can be determined according to the association relationship, and the user feels comfortable under the condition that the indoor temperature is in the target temperature range and the indoor humidity is in the target humidity range, so that the temperature and humidity dual-control process adjusts and maintains the current temperature and humidity of the indoor environment in the target temperature and humidity range;

in this embodiment, the user can also set a desired indoor humidity through a remote controller or a control panel; or, the air conditioner is preset with the association relationship between the set temperature and the set humidity, so that the user can determine the corresponding set humidity or temperature according to the association relationship by only setting the temperature or humidity as a parameter.

S603, acquiring a current temperature value and a current humidity value of a space where the air conditioner is located;

in this embodiment, the air conditioner is provided with a temperature sensor and a humidity sensor, which can be respectively used for detecting the real-time temperature and the real-time humidity of the space where the air conditioner is located, and the real-time temperature can be used as the current temperature value of the process of the current cycle, and the real-time humidity can be used as the current humidity value of the process of the current cycle;

s604, judging whether the current temperature value is within a target temperature range and the current humidity value is within a target humidity range, if so, executing a step S605, and if not, executing a step S606;

in this embodiment, the target temperature range is determined according to the association relationship between the set temperature input by the user and the air conditioner preset.

S605, controlling a compressor of the air conditioner to keep the current running frequency, and keeping the current wind speed by a fan;

in this embodiment, when the current temperature value is within the target temperature range and the current humidity value is within the target humidity range, it can be determined that the current indoor temperature and humidity are appropriate, and the temperature and humidity requirements of the user are met, so that the current operating state of the air conditioner can be maintained unchanged;

s606, acquiring a first humidity difference determined in the last cycle flow;

in this embodiment, assuming that the current process is the nth control process, the first humidity difference is the humidity difference between the current humidity value calculated in the nth-1 control process and the set humidity value, that is, Prh_n-1＝|RH_n-1Rhm |, wherein RH_n-1The current humidity value detected in the (n-1) th control process is Rhm which is a set humidity value.

S607, calculating and determining a humidity deviation value of the humidity difference value and the first humidity difference value;

in this embodiment, the humidity difference is the humidity difference between the current humidity value calculated in the current process and the set humidity value, that is, Prh_n＝|RH_nRhm |, wherein RH_n-1The current humidity value detected in the (n-1) th control process is Rhm which is a set humidity value.

Humidity deviation value of Drh_n＝|Prh_n-Prh_n-1|；

S608, calculating and determining a maximum wind speed value and a minimum wind speed value;

in the present embodiment, the maximum wind speed value V₁Calculated according to the following formula:

V₁＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*A；

minimum wind speed value V₂Calculated according to the following formula:

V₂＝(RH_n_Ki*Drh_n+RH_n_Kp*Prh_n)*B；

s609, controlling a fan of the air conditioner to operate in a sine wind speed change form;

in an embodiment, the fan of the air conditioner may also be operated in a cosine wind speed variation form.

In this embodiment, in the process that the air conditioner operates in the sine or cosine wind speed change form, the change period adopts the period duration preset by the air conditioner, and the maximum wind speed value and the minimum wind speed value adopt the maximum wind speed value and the minimum wind speed value calculated and determined in step S608;

s610, calculating and determining a wind speed threshold value according to a preset maximum wind speed value and a preset minimum wind speed value;

in the present embodiment, the wind speed threshold value can be calculated according to the following formula:

V_mid＝(V₁+V₁)/2，

wherein, V_midIs the wind speed threshold, V₁Is the maximum wind speed value, V₂Is the minimum wind speed value.

S611, judging whether the current wind speed value of the fan is larger than or equal to the wind speed threshold value, if so, executing a step S612, and if not, executing a step S613.

S612, controlling the compressor to be switched to a first frequency for operation;

in this embodiment, the first frequency is a preset operation frequency value with a smaller value.

S613, controlling the compressor to switch to a second frequency for operation;

in this embodiment, the second frequency is a preset operation frequency value with a larger value.

Fig. 7 is a fifth flowchart illustrating a method for controlling temperature and humidity according to an exemplary embodiment of the present invention, in an application scenario illustrated in fig. 7, taking a summer working condition as an example, a wind speed variation form adopts a sine or cosine manner, a variation period adopts a fixed period duration preset by an air conditioner, and a maximum wind speed value and a minimum wind speed value are calculated from a temperature difference; specifically, the control flow comprises the following specific steps:

s701, the air conditioner is in a refrigeration mode;

generally, in summer working conditions, an air conditioner operates in a refrigeration mode, and a user can input an expected indoor temperature through a remote controller or a control panel, namely, the operation mode of a fan and the operation frequency of a compressor are controlled in the process that the current indoor temperature and the current indoor humidity of the air conditioner are adjusted to the expected values;

optionally, when the indoor environment reaches the expected value set by the user, the temperature and humidity double control process of the present invention may be continuously adopted to maintain the stability of the indoor temperature and humidity conditions.

S702, acquiring a set temperature of a user;

in the present embodiment, the air conditioner is preset with the association relationship between the set temperature and the target temperature range and the target humidity range, for example, the association table between the set temperature and the target temperature range and the target humidity range. Therefore, after the set temperature of the user is obtained, the target temperature range and the target humidity range corresponding to the set temperature can be determined according to the association relationship, and the user feels comfortable under the condition that the indoor temperature is in the target temperature range and the indoor humidity is in the target humidity range, so that the temperature and humidity dual-control process adjusts and maintains the current temperature and humidity of the indoor environment in the target temperature and humidity range;

in this embodiment, the user can also set a desired indoor humidity through a remote controller or a control panel; or, the air conditioner is preset with the association relationship between the set temperature and the set humidity, so that the user can determine the corresponding set humidity or temperature according to the association relationship by only setting the temperature or humidity as a parameter.

S703, acquiring a current temperature value and a current humidity value of a space where the air conditioner is located;

in this embodiment, the air conditioner is provided with a temperature sensor and a humidity sensor, which can be respectively used for detecting the real-time temperature and the real-time humidity of the space where the air conditioner is located, and the real-time temperature can be used as the current temperature value of the process of the current cycle, and the real-time humidity can be used as the current humidity value of the process of the current cycle;

s704, judging whether the current temperature value is in a target temperature range and the current humidity value is in a target humidity range, if so, executing a step S705, and if not, executing a step S706;

in this embodiment, the target temperature range is determined according to the association relationship between the set temperature input by the user and the air conditioner preset.

S705, controlling a compressor of the air conditioner to keep the current running frequency, and keeping the current wind speed by a fan;

in this embodiment, when the current temperature value is within the target temperature range and the current humidity value is within the target humidity range, it can be determined that the current indoor temperature and humidity are appropriate, and the temperature and humidity requirements of the user are met, so that the current operating state of the air conditioner can be maintained unchanged;

s706, acquiring a first temperature difference determined in the last cycle flow;

in this embodiment, assuming that the current process is the nth control process, the first temperature difference is the temperature difference between the current temperature value calculated in the nth-1 control process and the set temperature value, i.e., Pt_n-1＝|T_n-1-Tm |, wherein T_n-1The current temperature value detected in the (n-1) th control flow is shown, and Tm is a set temperature value.

S707, calculating and determining a temperature deviation value between the temperature difference value and the first temperature difference value;

in this embodiment, the temperature difference is a temperature difference between the current temperature value and the set temperature value calculated in the current process, that is, Pt_n＝|T_n-Tm |, wherein T_n-1For the (n-1) th control streamThe current temperature value, Tm, detected in the process is a set temperature value.

Deviation value of temperature Dt_n＝|Pt_n-Pt_n-1|；

S708, calculating and determining a maximum wind speed value and a minimum wind speed value;

in the present embodiment, the maximum wind speed value V₁Calculated according to the following formula:

V₃＝(T_Ki*Dt_n+T_Kp*Pt_n)*C；

minimum wind speed value V₂Calculated according to the following formula:

V₄＝(T_n_Ki*Dt_n+T_n_Kp*Pt_n)*D；

s709, controlling a fan of the air conditioner to operate in a sine wind speed change form;

in an embodiment, the fan of the air conditioner may also be operated in a cosine wind speed variation form.

In this embodiment, in the process that the air conditioner operates in the sine or cosine wind speed variation form, the variation period adopts the period duration preset by the air conditioner, and the maximum wind speed value and the minimum wind speed value adopt the maximum wind speed value and the minimum wind speed value calculated and determined in step S708;

s710, calculating and determining a wind speed threshold value according to a preset maximum wind speed value and a preset minimum wind speed value;

in the present embodiment, the wind speed threshold value can be calculated according to the following formula:

V_mid＝(V₃+V₄)/2，

wherein, V_midIs the wind speed threshold, V₃Is the maximum wind speed value, V₄Is the minimum wind speed value.

And S711, judging whether the current wind speed value of the fan is greater than or equal to a wind speed threshold value, if so, executing the step S712, and if not, executing the step S713.

S712, controlling the compressor to be switched to the first frequency for operation;

in this embodiment, the first frequency is a preset operation frequency value with a smaller value.

S713, controlling the compressor to be switched to a second frequency for operation;

in this embodiment, the second frequency is a preset operation frequency value with a larger value.

Fig. 8 is a sixth flowchart illustrating a method for controlling temperature and humidity according to an exemplary embodiment of the present invention, in an application scenario illustrated in fig. 8, taking a summer working condition as an example, a wind speed variation form adopts a sine or cosine manner, and a variation period, a maximum wind speed value, and a minimum wind speed value are calculated from a humidity difference; specifically, the control flow comprises the following specific steps:

s801, enabling an air conditioner to be in a refrigeration mode;

generally, in summer working conditions, an air conditioner operates in a refrigeration mode, and a user can input an expected indoor temperature through a remote controller or a control panel, namely, the operation mode of a fan and the operation frequency of a compressor are controlled in the process that the current indoor temperature and the current indoor humidity of the air conditioner are adjusted to the expected values;

optionally, when the indoor environment reaches the expected value set by the user, the temperature and humidity double control process of the present invention may be continuously adopted to maintain the stability of the indoor temperature and humidity conditions.

S802, acquiring a set temperature of a user;

in the present embodiment, the air conditioner is preset with the association relationship between the set temperature and the target temperature range and the target humidity range, for example, the association table between the set temperature and the target temperature range and the target humidity range. Therefore, after the set temperature of the user is obtained, the target temperature range and the target humidity range corresponding to the set temperature can be determined according to the association relationship, and the user feels comfortable under the condition that the indoor temperature is in the target temperature range and the indoor humidity is in the target humidity range, so that the temperature and humidity dual-control process adjusts and maintains the current temperature and humidity of the indoor environment in the target temperature and humidity range;

in this embodiment, the user can also set a desired indoor humidity through a remote controller or a control panel; or, the air conditioner is preset with the association relationship between the set temperature and the set humidity, so that the user can determine the corresponding set humidity or temperature according to the association relationship by only setting the temperature or humidity as a parameter.

S803, acquiring a current temperature value and a current humidity value of a space where the air conditioner is located;

in this embodiment, the air conditioner is provided with a temperature sensor and a humidity sensor, which can be respectively used for detecting the real-time temperature and the real-time humidity of the space where the air conditioner is located, and the real-time temperature can be used as the current temperature value of the process of the current cycle, and the real-time humidity can be used as the current humidity value of the process of the current cycle;

s804, judging whether the current temperature value is in the target temperature range and the current humidity value is in the target humidity range, if so, executing a step S805, otherwise, executing a step S806;

in this embodiment, the target temperature range is determined according to the association relationship between the set temperature input by the user and the air conditioner preset.

S805, controlling a compressor of the air conditioner to keep the current running frequency, and keeping the current wind speed by a fan;

in this embodiment, when the current temperature value is within the target temperature range and the current humidity value is within the target humidity range, it can be determined that the current indoor temperature and humidity are appropriate, and the temperature and humidity requirements of the user are met, so that the current operating state of the air conditioner can be maintained unchanged;

s806, acquiring a first humidity difference value determined in the last cycle flow;

in this embodiment, assuming that the current process is the nth control process, the first humidity difference is the humidity difference between the current humidity value calculated in the nth-1 control process and the set humidity value, that is, Prh_n-1＝|RH_n-1Rhm |, wherein RH_n-1The current humidity value detected in the (n-1) th control process is Rhm which is a set humidity value.

S807, calculating and determining a humidity deviation value of the humidity difference value and the first humidity difference value;

in this embodiment, the humidity difference is the current processThe humidity difference between the calculated current humidity value and the set humidity value, i.e., Prh_n＝|RH_nRhm |, wherein RH_n-1The current humidity value detected in the (n-1) th control process is Rhm which is a set humidity value.

Humidity deviation value of Drh_n＝|Prh_n-Prh_n-1|；

S808, calculating and determining the period duration of the change period of the wind speed change form;

in this embodiment, the period duration of the variation period is calculated according to the following formula:

L＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*E；

wherein L is the cycle duration of the variation cycle, RH _ Ki is the humidity deviation coefficient, RH _ Kp is the humidity difference coefficient, E is the first cycle calculation coefficient, Drh_nDeviation value of humidity difference, Prh_nFor difference in humidity, RH_nRhm is the current humidity value and the set humidity value.

S809, calculating and determining a maximum wind speed value and a minimum wind speed value;

in the present embodiment, the maximum wind speed value V₁Calculated according to the following formula:

V_max＝(T_Ki*Dt_n+T_Kp*Pt_n)*A；

minimum wind speed value V₂Calculated according to the following formula:

V_max＝(T_n_Ki*Dt_n+T_n_Kp*Pt_n)*B；

s810, controlling a fan of the air conditioner to operate in a sine wind speed change mode;

in an embodiment, the fan of the air conditioner may also be operated in a cosine wind speed variation form.

In this embodiment, in the process that the air conditioner operates in the sine or cosine wind speed variation form, the variation period adopts the period duration calculated and determined in step S808, and the maximum wind speed value and the minimum wind speed value adopt the maximum wind speed value and the minimum wind speed value calculated and determined in step S809;

s811, calculating and determining a wind speed threshold according to a preset maximum wind speed value and a preset minimum wind speed value;

in the present embodiment, the wind speed threshold value can be calculated according to the following formula:

V_mid＝(V_max+V_min)/2，

wherein, V_midIs the wind speed threshold, V_maxIs the maximum wind speed value, V_minIs the minimum wind speed value.

S812, judging whether the current wind speed value of the wind turbine is larger than or equal to a wind speed threshold value, if so, executing the step S813, and if not, executing the step S814.

S813, controlling the compressor to be switched to a first frequency for operation;

in this embodiment, the first frequency is a preset operation frequency value with a smaller value.

S814, controlling the compressor to be switched to a second frequency for operation;

in this embodiment, the second frequency is a preset operation frequency value with a larger value.

In the above embodiments, if the current temperature value is within the target temperature range and the current humidity value is not within the target humidity range, the air conditioner mainly performs dehumidification, and controls the air conditioner to operate in a dehumidification mode, a fan of an indoor unit of the air conditioner operates at a set single rotation speed, and a compressor operates at a frequency corresponding to the dehumidification mode; and if the current temperature value is not in the target temperature range and the current humidity value is in the target humidity range, the air conditioner mainly takes refrigeration as a main part, the air conditioner is controlled to operate in a refrigeration mode, a fan of an indoor unit of the air conditioner operates at a set single rotating speed, and a compressor operates at a frequency corresponding to the refrigeration mode. Preferably, the fan of the air conditioner operates in a sine or cosine mode and the frequency adjustment of the corresponding compressor, and the temperature and humidity dual-adjustment operation is mainly performed under the condition that the current temperature value and the current humidity value are not in the target temperature and humidity range.

In an embodiment of the present invention, the present invention provides a temperature and humidity double control device for an air conditioner, which can be used to control the air conditioner to execute the temperature and humidity double control process of the present invention, so as to maintain the indoor environment temperature and humidity at a more suitable temperature and humidity condition; specifically, the temperature and humidity double-control device comprises:

the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current temperature value and the current humidity value of the space where the air conditioner is located;

the air speed control unit is used for controlling a fan of the air conditioner to operate in a sine or cosine air speed change mode when the current temperature value is not in the target temperature range and the current humidity value is not in the target humidity range, wherein the maximum air speed value and the minimum air speed value in the air speed change mode are determined according to the temperature difference value between the current temperature value and the set temperature value or the humidity difference value between the current humidity value and the set humidity value;

the first determining unit is used for determining a wind speed threshold value corresponding to the frequency switching of the compressor according to the maximum wind speed value and the minimum wind speed value;

the frequency control unit is used for controlling the compressor to operate at a first frequency when the current wind speed of the fan is greater than a wind speed threshold value; and when the current wind speed value of the fan is smaller than the wind speed threshold value, controlling the compressor to operate at a second frequency, wherein the first frequency is smaller than the second frequency.

In an embodiment, the apparatus further comprises a second determining unit configured to: determining a humidity deviation value of the humidity difference value and the first humidity difference value determined last time; and determining a first maximum wind speed value and a first minimum wind speed value according to the humidity deviation value.

Specifically, the determining the first maximum wind speed value and the first minimum wind speed value by the second determining unit according to the humidity deviation value includes:

the first maximum wind speed value is calculated according to the following formula:

V₁＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*A；

the first minimum wind speed value is calculated according to the following formula:

V₂＝(RH_n_Ki*Drh_n+RH_n_Kp*Prh_n)*B；

wherein, Drh_n＝|Prh_n-Prh_n-1|，Prh_n＝|RH_n–RHm|，

V₁Is a first maximum wind speed value, V₂Is a first minimum wind speed value, RH _ Ki is a humidity deviation coefficient, RH _ Kp is a humidity difference coefficient, A is a first maximum wind speed coefficient, B is a first minimum wind speed coefficient, Drh_nDeviation value of humidity difference, Prh_nFor difference in humidity, RH_nRhm is the current humidity value and the set humidity value.

In this embodiment, the first determining unit is configured to determine a wind speed threshold corresponding to the switching of the compressor frequency according to the maximum wind speed value and the minimum wind speed value, and includes:

calculating a first wind speed threshold value according to the following formula:

V_rh＝(V₁+V₂)/2，

wherein, V_rhIs a first wind speed threshold.

In another embodiment, the apparatus comprises a third determining unit to: determining a temperature deviation value of the temperature difference value and the first temperature difference value determined last time; and determining a second maximum wind speed value and a second minimum wind speed value according to the temperature deviation value.

Specifically, the third determining unit is configured to determine a second maximum wind speed value and a second minimum wind speed value according to the temperature deviation value, and includes:

the second maximum wind speed value is calculated according to the following formula:

V₃＝(T_Ki*Dt_n+T_Kp*Pt_n)*C；

the second minimum wind speed value is calculated according to the following formula:

V₄＝(T_Ki*Dt_n+T_Kp*Pt_n)*D；

wherein Dt is_n＝|Pt_n-Pt_n-1|，Pt_n＝|T_n–Tm|，

V₃Is the second maximum wind speed value, V₄Is a second minimum wind speed value, T _ Ki is a temperature deviation coefficient, T _ Kp is a temperature difference coefficient, C is a second maximum wind speed coefficient, D is a second minimum wind speed coefficient, Dt_nDeviation value of temperature difference, Pt_nFor temperature difference, T_nAnd the current temperature value is Tm is a set temperature value.

In this embodiment, the determining, by the first determining unit, a wind speed threshold corresponding to the switching of the compressor frequency according to the maximum wind speed value and the minimum wind speed value includes:

the second wind speed threshold value is calculated according to the following formula:

V_t＝(V₃+V₄)/2，

wherein, V_tIs a second wind speed threshold.

In another embodiment of the present invention, the present invention provides a temperature and humidity double control device for an air conditioner, which can be used to control the air conditioner to perform the temperature and humidity double control process of the present invention, so as to maintain the indoor environment temperature and humidity at a more suitable temperature and humidity condition; specifically, the temperature and humidity double-control device comprises:

the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current temperature value and the current humidity value of the space where the air conditioner is located;

the fan control unit is used for controlling a fan of the air conditioner to operate in a sine or cosine wind speed change mode when the current temperature value is not in a target temperature range and the current humidity value is not in a target humidity range, wherein the change period of the wind speed change mode is determined according to the humidity difference value between the current humidity value and a set humidity value;

the first determining unit is used for determining a wind speed threshold value corresponding to the frequency switching of the compressor according to the maximum wind speed value and the minimum wind speed value of the wind speed change form;

the frequency control unit is used for controlling the compressor to operate at a first frequency when the current wind speed of the fan is greater than a wind speed threshold value; and when the current wind speed value of the fan is smaller than the wind speed threshold value, controlling the compressor to operate at a second frequency, wherein the first frequency is smaller than the second frequency.

In an embodiment, the apparatus further comprises a second determining unit configured to:

determining a humidity deviation value of the humidity difference value and the first humidity difference value determined last time;

and determining the period duration of the change period according to the humidity deviation value.

In this embodiment, the second determining unit is specifically configured to calculate the period duration of the change period according to the following formula:

L＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*E；

wherein, Drh_n＝|Prh_n-Prh_n-1|，Pt_n＝|RH_n–RHm|，

L is the cycle duration of the variation cycle, RH _ Ki is the humidity deviation coefficient, RH _ Kp is the humidity difference coefficient, E is the first cycle calculation coefficient, Drh_nDeviation value of humidity difference, Prh_nFor difference in humidity, RH_nRhm is the current humidity value and the set humidity value.

In this embodiment, the first determining unit is specifically configured to calculate the wind speed threshold according to the following formula:

V_rh＝(V₁+V₂)/2，

wherein, V_rhIs the wind speed threshold, V₁Is the maximum wind speed value, V₂Is the minimum wind speed value.

In another embodiment, the apparatus further comprises a third determining unit configured to:

determining a humidity deviation value of the humidity difference value and the first humidity difference value determined last time;

and determining the period duration of the high-frequency stage corresponding to the operation of the compressor at the second frequency according to the humidity deviation value.

In this embodiment, the third determining unit is specifically configured to:

the period duration of the high-frequency stage is calculated according to the following formula:

L₁＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*F；

wherein, Drh_n＝|Prh_n-Prh_n-1|，Pt_n＝|RH_n–RHm|，

L₁The period duration of the high-frequency phase, RH _ Ki is the humidity deviation coefficient, and RH _ Kp is the humidity differenceCoefficient, F is the second period calculation coefficient, Drh_nDeviation value of humidity difference, Prh_nFor difference in humidity, RH_nThe current humidity value is Rhm is a set humidity value;

thus, the third determination unit may calculate the period duration of the change period according to the following formula:

L＝L₁+L₂，

wherein L is the period duration of the variation period, L₂A period duration of a low frequency stage corresponding to the compressor operating at the first frequency, and L₂Is a preset fixed time duration.

In this embodiment, the determining, by the first determining unit, a wind speed threshold corresponding to the switching of the compressor frequency according to the maximum wind speed value and the minimum wind speed value of the wind speed variation form includes:

the wind speed threshold value is calculated according to the following formula:

V_rh＝(V₁+V₂)/2，

wherein, V_rhIs the wind speed threshold, V₁Is the maximum wind speed value, V₂Is the minimum wind speed value.

In another embodiment of the present invention, the present invention provides a temperature and humidity double control device for an air conditioner, which can be used to control the air conditioner to perform the temperature and humidity double control process of the present invention, so as to maintain the indoor environment temperature and humidity at a more suitable temperature and humidity condition; specifically, the temperature and humidity double-control device comprises:

the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current temperature value and the current humidity value of the space where the air conditioner is located;

the fan control unit is used for controlling a fan of the air conditioner to operate in a sine or cosine wind speed change form when the current temperature value is not in the target temperature range and the current humidity value is not in the target humidity range, wherein the change period of the wind speed change form is determined according to the humidity difference value between the current humidity value and the set humidity value;

the first determining unit is used for determining a wind speed threshold value corresponding to the frequency switching of the compressor according to the maximum wind speed value and the minimum wind speed value of the wind speed change form;

the frequency control unit is used for controlling the compressor to operate at a first frequency when the current wind speed of the fan is greater than a wind speed threshold value; and when the current wind speed value of the fan is smaller than the wind speed threshold value, controlling the compressor to operate at a second frequency, wherein the first frequency is smaller than the second frequency.

In this embodiment, the apparatus further includes a second determining unit, configured to:

determining a humidity deviation value of the humidity difference value and the first humidity difference value determined last time;

and determining a first maximum wind speed value and a first minimum wind speed value according to the humidity deviation value.

In this embodiment, the second determining unit is specifically configured to:

the maximum wind speed value is calculated according to the following formula:

V₁＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*A；

the minimum wind speed value is calculated according to the following formula:

V₂＝(RH_n_Ki*Drh_n+RH_n_Kp*Prh_n)*B；

wherein, Drh_n＝|Prh_n-Prh_n-1|，Pt_n＝|RH_n–RHm|，

V₁Is the maximum wind speed value, V₂Is the minimum wind speed value, RH _ Ki is the humidity deviation coefficient, RH _ Kp is the humidity difference coefficient, A is the maximum wind speed coefficient, B is the minimum wind speed coefficient, Drh_nDeviation value of humidity difference, Prh_nFor difference in humidity, RH_nRhm is the current humidity value and the set humidity value.

In this embodiment, the first determining unit is specifically configured to: the wind speed threshold value is calculated according to the following formula:

V_rh＝(V₁+V₂)/2，

wherein, V_rhIs the wind speed threshold, V₁Is the maximum wind speed value, V₂Is the minimum wind speed value.

In this embodiment, the apparatus further includes a third determining unit, configured to:

determining a humidity deviation value of the humidity difference value and the first humidity difference value determined last time;

and determining the period duration of the change period according to the humidity deviation value.

In this embodiment, the third unit is specifically configured to:

the period duration of the change period is calculated according to the following formula:

L＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*E；

wherein, Drh_n＝|Prh_n-Prh_n-1|，Pt_n＝|RH_n–RHm|，

L is the cycle duration of the variation cycle, RH _ Ki is the humidity deviation coefficient, RH _ Kp is the humidity difference coefficient, E is the first cycle calculation coefficient, Drh_nDeviation value of humidity difference, Prh_nFor difference in humidity, RH_nRhm is the current humidity value and the set humidity value.

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 (10)

1. A method for temperature and humidity double control of an air conditioner is characterized by comprising the following steps:

acquiring a current temperature value and a current humidity value of a space where an air conditioner is located;

when the current temperature value is not in the target temperature range and the current humidity value is not in the target humidity range, controlling a fan of the air conditioner to operate in a sine or cosine wind speed change form, wherein the maximum wind speed value and the minimum wind speed value of the wind speed change form are determined according to the temperature difference between the current temperature value and the set temperature value or the humidity difference between the current humidity value and the set humidity value;

determining a wind speed threshold corresponding to the frequency switching of the compressor according to the maximum wind speed value and the minimum wind speed value;

when the current wind speed of the fan is larger than the wind speed threshold value, controlling the compressor to operate at a first frequency; and when the current wind speed value of the fan is smaller than the wind speed threshold value, controlling the compressor to operate at a second frequency, wherein the first frequency is smaller than the second frequency.

2. The method of claim 1, wherein the maximum and minimum wind speed values for the wind speed variation are determined from a humidity difference between the current humidity value and a set humidity value, comprising:

determining a humidity deviation value of the humidity difference value and the first humidity difference value determined last time;

and determining a first maximum wind speed value and a first minimum wind speed value according to the humidity deviation value.

3. The method of claim 2, wherein determining the first maximum wind speed value and the first minimum wind speed value based on the humidity deviation value comprises:

the first maximum wind speed value is calculated according to the following formula:

V₁＝(RH_Ki*Drh_n+RH_Kp*Prh_n)*A；

the first minimum wind speed value is calculated according to the following formula:

V₂＝(RH_n_Ki*Drh_n+RH_n_Kp*Prh_n)*B；

wherein, Drh_n＝|Prh_n-Prh_n-1|，Prh_n＝|RH_n–RHm|，

V₁Is the first maximum wind speed value, V₂For the first minimum wind speed value, RH _ Ki is the humidity deviation coefficient, RH _ Kp is the humidity difference coefficient, A is the first maximum wind speed coefficient, B is the first minimum wind speed coefficient, Drh_nPrh for the deviation value of humidity_nFor the difference in humidity, RH_nAnd Rhm is the current humidity value and the set humidity value.

4. The method of claim 3, wherein determining a wind speed threshold value corresponding to a compressor frequency switch based on the maximum wind speed value and the minimum wind speed value comprises:

calculating a first wind speed threshold value according to the following formula:

V_rh＝(V₁+V₂)/2，

wherein, V_rhIs the first wind speed threshold.

5. The method of claim 1, wherein the maximum and minimum wind speed values for the wind speed variation are determined from a temperature difference between the current temperature value and a set temperature value, comprising:

determining a temperature deviation value of the temperature difference value and the first temperature difference value determined last time;

and determining a second maximum wind speed value and a second minimum wind speed value according to the temperature deviation value.

6. The method of claim 5, wherein determining the second maximum wind speed value and the second minimum wind speed value based on the temperature deviation value comprises:

the second maximum wind speed value is calculated according to the following formula:

V₃＝(T_Ki*Dt_n+T_Kp*Pt_n)*C；

the second minimum wind speed value is calculated according to the following formula:

V₄＝(T_Ki*Dt_n+T_Kp*Pt_n)*D；

wherein Dt is_n＝|Pt_n-Pt_n-1|，Pt_n＝|T_n–Tm|，

V₃Is the second maximum wind speed value, V₄The second minimum wind speed value is shown, T _ Ki is a temperature deviation coefficient, T _ Kp is a temperature difference coefficient, C is a second maximum wind speed coefficient, D is a second minimum wind speed coefficient, Dt_nFor the deviation value of the temperature, Pt_nIs the temperature difference, T_nAnd the Tm is the current temperature value and the set temperature value.

7. The method of claim 6, wherein determining a wind speed threshold value corresponding to a compressor frequency switch based on the maximum wind speed value and the minimum wind speed value comprises:

the second wind speed threshold value is calculated according to the following formula:

V_t＝(V₃+V₄)/2，

wherein, V_tIs the second wind speed threshold.

8. The device for double control of temperature and humidity of the air conditioner is characterized by comprising:

the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current temperature value and the current humidity value of the space where the air conditioner is located;

the air speed control unit is used for controlling a fan of the air conditioner to operate in a sine or cosine air speed change mode when the current temperature value is not in a target temperature range and the current humidity value is not in a target humidity range, wherein the maximum air speed value and the minimum air speed value in the air speed change mode are determined according to the temperature difference value between the current temperature value and a set temperature value or the humidity difference value between the current humidity value and the set humidity value;

the first determining unit is used for determining a wind speed threshold value corresponding to the frequency switching of the compressor according to the maximum wind speed value and the minimum wind speed value;

the frequency control unit is used for controlling the compressor to operate at a first frequency when the current wind speed of the fan is greater than the wind speed threshold value; and when the current wind speed value of the fan is smaller than the wind speed threshold value, controlling the compressor to operate at a second frequency, wherein the first frequency is smaller than the second frequency.

9. The apparatus of claim 8, further comprising a second determining unit configured to:

determining a humidity deviation value of the humidity difference value and the first humidity difference value determined last time;

and determining a first maximum wind speed value and a first minimum wind speed value according to the humidity deviation value.

10. The apparatus of claim 8, further comprising a third determining unit configured to:

determining a temperature deviation value of the temperature difference value and the first temperature difference value determined last time;

and determining a second maximum wind speed value and a second minimum wind speed value according to the temperature deviation value.

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