CN107525227B

CN107525227B - Method and device for double control of temperature and humidity of air conditioner

Info

Publication number: CN107525227B
Application number: CN201710657739.3A
Authority: CN
Inventors: 许文明; 付裕; 王飞
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Haier Smart Home Co Ltd; Qingdao Haier Jiaozhou Air Conditioner Co Ltd
Priority date: 2017-08-03
Filing date: 2017-08-03
Publication date: 2020-05-29
Anticipated expiration: 2037-08-03
Also published as: CN107525227A

Abstract

The invention discloses a method for double controlling the temperature and the humidity of an air conditioner, and belongs to the technical field of air conditioner control. 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; determining a current temperature difference value between a current temperature value and a set temperature value and a current humidity difference value between a current humidity value and a set humidity value; and determining whether to start the electric heating and the output power when the electric heating is started according to the current temperature difference value and the current humidity value. The method for double controlling the temperature and the humidity of the air conditioner can adjust the operation of the compressor and the electric heating according to indoor environment parameters such as the temperature, the humidity and the like, thereby ensuring the temperature control effect on the indoor environment and the aim of controlling the indoor humidity by controlling the operation frequency of the compressor.

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; determining a current temperature difference value between a current temperature value and a set temperature value and a current humidity difference value between a current humidity value and a set humidity value; and determining whether to start the electric heating and the output power when the electric heating is started according to the current temperature difference value and the current humidity value.

Further, determining the target operating frequency of the compressor according to the current temperature difference includes: determining a first temperature deviation value of the previous temperature difference value and the first temperature difference value determined last time; and a second temperature deviation value of the first temperature difference value and a second temperature difference value determined last time; and determining the target operation frequency of the compressor according to the first temperature deviation value and the second temperature deviation value.

Further, determining a target operating frequency of the compressor based on the first temperature deviation value and the second temperature deviation value includes: the target operating frequency is obtained by performing PID calculation according to the following formula:

Hzout＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

Hzout is target operating frequency, Out _ gain is output coefficient, Kp is proportional control quantity, Ki is integral control quantity, Kd is differential control quantity, D_nA first temperature deviation value for the current temperature difference value and the last determined first temperature difference value, D_n-1A second temperature deviation value, P, of the first temperature difference value and a second temperature difference value determined last time_nFor the current temperature difference, P_n-1Is a first temperature difference, P_n-2Is the second temperature difference.

Further, the method further comprises: when the current temperature value reaches the set temperature value, the compressor is controlled to operate at the set minimum frequency, and the inner fan of the air conditioner operates at a low rotating speed.

Further, determining whether to turn on the electric heating according to the current temperature difference value and the humidity value includes: determining a target temperature difference range and a target humidity range according to the set temperature value; when the target temperature difference value is not within the target temperature difference range and the current humidity value is not within the target humidity range, controlling to start electric heating; and when the target temperature difference value is within the target temperature difference range and/or the current humidity value is within the target humidity range, the electric heating is not started.

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 acquisition module is used for acquiring the current temperature value and the current humidity value of the space where the air conditioner is located; the first determination module is used for determining a current temperature difference value between a current temperature value and a set temperature value and a current humidity difference value between a current humidity value and a set humidity value; and the second determining module is used for determining the target operating frequency of the compressor according to the current temperature difference value, and determining whether to start the electric heating and the output power when the electric heating is started according to the current temperature difference value and the current humidity value.

Further, the second determining module includes: the first determining submodule is used for determining a first temperature deviation value of the previous temperature difference value and the first temperature difference value determined last time; and a second temperature deviation value of the first temperature difference value and a second temperature difference value determined last time; and the second determining submodule is used for determining the target operating frequency of the compressor according to the first temperature deviation value and the second temperature deviation value.

Further, the second determining submodule is used for performing PID calculation according to the following formula to obtain the target operating frequency:

Hzout＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

Further, the apparatus further comprises a first control module configured to: when the current temperature value reaches the set temperature value, the compressor is controlled to operate at the set minimum frequency, and the inner fan of the air conditioner operates at a low rotating speed.

Further, the apparatus further comprises: the third determining subunit is used for determining a target temperature difference range and a target humidity range according to the set temperature value; a second control module to: when the target temperature difference value is not within the target temperature difference range and the current humidity value is not within the target humidity range, controlling to start electric heating; and when the target temperature difference value is within the target temperature difference range and/or the current humidity value is within the target humidity range, the electric heating is not started.

The method for double controlling the temperature and the humidity of the air conditioner can adjust the operation of the compressor and the electric heating according to the indoor environment parameters such as the temperature, the humidity and the like, thereby ensuring the temperature control effect on the indoor environment by controlling the operation frequency of the compressor, and achieving the purpose of controlling the indoor humidity by controlling the electric heating, so that the indoor temperature and the humidity can meet the requirement of the comfort level of a user, and the influence of other environment parameter fluctuation caused by adjusting a single indoor environment parameter is avoided.

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

FIG. 2 is a second flowchart illustrating a temperature and humidity dual control method of an air conditioner according to an exemplary embodiment of the present invention;

fig. 3 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. 4 is a fourth flowchart illustrating an air conditioner temperature and humidity dual control method according to an exemplary embodiment of the present invention;

FIG. 5 is a fifth flowchart illustrating a method for dual control of temperature and humidity according to an exemplary embodiment of the present invention;

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

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

FIG. 8 is a fifth flowchart illustrating a method for dual control of temperature and humidity according to an exemplary embodiment of the present invention;

fig. 9 is a flowchart illustrating a fifth method for controlling temperature and humidity 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 condition in summer, the air conditioner can be switched to the dehumidification mode from the refrigeration mode to operate, and the dehumidification efficiency of the dehumidification mode can be accelerated by improving the operation frequency of the compressor, so that the indoor environment humidity can be 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, the invention provides two adjustment modes: one is that the target operation frequency of the compressor is determined according to the current temperature value of the indoor environment and the temperature value set by the user; in another method, a target operating frequency of the compressor is determined according to a current temperature value of the indoor environment and a temperature value set by a user, and by combining the current humidity value of the indoor environment and a humidity value set by the user. The first of the two adjusting modes is mainly to adjust the operating frequency of the compressor according to the temperature difference between the current temperature value and the set temperature value of the indoor environment, so that the operating frequency of the compressor can preferentially meet the requirement of the amount of refrigerant for adjusting the temperature of the air conditioner, and the air conditioner is suitable for the cooling and heating operation modes of the air conditioner; the second method combines the temperature difference between the current temperature value and the set temperature value of the indoor environment and the humidity difference between the current humidity value and the set humidity value to make the operation frequency of the compressor meet the refrigerant quantity requirement with larger parameter difference preferentially, and is suitable for the refrigeration and dehumidification operation mode of the air conditioner.

Fig. 1 is a first flowchart illustrating a temperature and humidity double control method of an air conditioner according to an exemplary embodiment of the present invention. In the application scenario shown in fig. 1, a related procedure for determining a target operating frequency of a compressor according to a current temperature value and a set temperature value of an indoor environment is disclosed.

Specifically, as shown in fig. 1, the step of determining the target operating frequency of the compressor according to the current temperature value and the set temperature value of the indoor environment mainly includes:

s101, obtaining a current temperature value of a space where an air conditioner is located;

in the embodiment, the air conditioner is generally installed in the indoor space such as the living room, the bedroom, and the meeting room, and therefore, the current temperature value of the indoor space such as the living room, the bedroom, or the meeting room where the air conditioner is installed, which is obtained in step S101, is the real-time indoor environment temperature value obtained in the current process.

Preferably, the air conditioner is provided with a temperature sensor which can be used for detecting the current temperature value of the indoor environment. The sensing end of the temperature sensor can be arranged on the air inlet of the air conditioner or the outer wall of the shell, so that the detected current temperature value can be the same as or similar to the actual temperature of the indoor environment, and the accuracy of the target operation frequency of the compressor determined according to the current temperature value is improved.

S102, determining a current temperature difference value between a current temperature value and a set temperature value;

in an embodiment, when the air conditioner is started to operate, a user may input a target indoor environment temperature to be reached, that is, a set temperature value, through a remote controller or a control panel on the air conditioner body, where the target indoor environment temperature to be reached is set to 24 ℃ by the user through the remote controller in a high-temperature working condition in summer, and then 24 ℃ is the set temperature value.

It should be understood that, if the user does not input the target indoor environment temperature value through the remote controller or the control panel, it is generally the default that the temperature value maintained when the air conditioner is turned off last time is the set temperature value, and if the set temperature value when the air conditioner is turned off last time is 26 ℃, under the condition that the air conditioner is turned on and operated this time and the user does not input the set temperature value, 26 ℃ when the air conditioner is operated last time is the set temperature value of the present process.

In the embodiment, in a high-temperature working condition in summer, the current temperature value of the indoor environment is generally higher than the set temperature value, so that the current temperature difference is the difference value obtained by subtracting the set temperature value from the current temperature value; in winter, the current temperature value of the indoor environment is generally lower than the set temperature value, and therefore, the current temperature difference is obtained by subtracting the current temperature value from the set temperature value. For convenience of calculation, it is preferable that the current temperature difference determined by the present invention is an absolute value of a difference between the current temperature value and the set temperature value.

S103, determining a target operation frequency of the compressor according to the current temperature difference;

in this embodiment, the frequency adjustment process of the air conditioner compressor is performed multiple times in a set period, and therefore, in each period flow, the current temperature difference of the current period flow can be calculated and determined.

That is, before the current temperature of the indoor environment reaches the set temperature, the air conditioner needs to repeatedly execute the process in the foregoing embodiment m times, taking the nth time as an example, and before the target operation frequency of the compressor in the nth cycle process is determined, the current temperature difference determined in the cycle processes of the (n-1) th time and the (n-2) th time needs to be predetermined; the current temperature difference value of the n-1 th time is the difference value between the current temperature value acquired in the cycle flow of the n-1 th time and the set temperature, and the current temperature difference value of the n-2 nd time is the difference value between the current temperature value acquired in the cycle flow of the n-2 th time and the set temperature.

For example, taking the refrigeration process of the high-temperature working condition in summer as an example, in the continuous three-cycle process, because the air-conditioning refrigeration mode is continuously operated, the current temperature values detected in the three cycles are gradually decreased, for example, the current temperature value for the n-2 th cycle is 30 ℃, the current temperature value for the n-1 st cycle is 29 ℃, the current temperature value for the n-1 th cycle is 27 ℃, the set temperature value for the air-conditioning is 24 ℃, the current temperature difference value for the n-2 th cycle is 6 ℃, the current temperature difference value for the n-1 st cycle is 5 ℃, and the current temperature difference value for the n-th cycle is 3 ℃.

In this way, a first temperature deviation value between the current temperature difference and the first temperature difference determined last time, that is, a temperature deviation value between the current temperature difference of the current cycle flow and the current temperature difference of the previous cycle flow, may be further determined, for example, if the current cycle flow is the nth time, the first temperature deviation value may be determined to be 5-3 — 2 ℃ according to the current temperature difference between the nth time and the n-1 th time calculated in the foregoing embodiment.

Similarly, a second temperature deviation value between the first temperature difference and the second temperature difference determined last time, that is, a temperature deviation value between the current temperature difference of the last cycle flow this time and the current temperature difference of the last cycle flow last time may also be determined, for example, if the last cycle flow this time is the cycle flow n-1, the last cycle flow is the cycle flow n-2, and the second temperature deviation value is determined to be 6-5 to 1 ℃ according to the current temperature difference between the n-1 th time and the n-2 th time calculated in the foregoing embodiment.

It should be understood that, in order to distinguish the current temperature difference values in the different periodic processes, the present invention defines the current temperature difference value in the n-1 st periodic process as the first temperature difference value and the current temperature difference value in the n-2 nd periodic process as the second temperature difference value in the foregoing embodiments.

Preferably, the temperature deviation value determined by the present invention is also the absolute value of the value used for calculation.

In this way, a target operating frequency of the compressor may be determined based on the first temperature deviation value and the second temperature deviation value.

Specifically, the target operating frequency of the compressor is calculated by PID according to the following formula:

Hzout＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

Therefore, the target operation frequency of the compressor can be calculated according to the calculation formula, and is used as the set operation frequency of the compressor in the current cycle process, and the actual operation frequency of the compressor or the operation frequency in the last cycle process is adjusted to be the determined target operation frequency, so that the refrigerant quantity output to the refrigerant circulation system of the air conditioner can meet the refrigerant quantity requirement of the air conditioner for refrigeration, heating or dehumidification, and can be matched with the current working condition, and the effects of saving energy, reducing consumption and improving the overall performance of the air conditioner can be achieved.

In this embodiment, when the current temperature value reaches the set temperature value, the compressor is controlled to operate at the set minimum frequency, and the internal fan of the air conditioner operates at a low rotation speed, so that the indoor environment temperature can be maintained at the set temperature or at a temperature close to the set temperature, the consumption of electric energy can be reduced, and the use cost of the air conditioner can be reduced.

Fig. 2 is a second flowchart illustrating an air conditioner temperature and humidity dual control method according to an exemplary embodiment of the present invention. In the application scenario shown in fig. 2, a relevant process for determining the target operating frequency of the compressor according to the current temperature value and the set temperature value of the indoor environment and combining the current humidity value of the indoor environment and the humidity value set by the user is disclosed.

Specifically, as shown in fig. 2, the step of determining the target operating frequency of the compressor according to the current temperature value and the set temperature value of the indoor environment and by combining the current humidity value of the indoor environment and the humidity value set by the user mainly includes:

s201, acquiring a current temperature value and a current humidity value of a space where an air conditioner is located;

in an embodiment, the manner of obtaining the current temperature value of the space where the air conditioner is located may refer to the embodiment shown in fig. 1, and the present invention is not described herein again.

For the parameter of the current humidity value, in the embodiment, the current humidity value of the indoor space such as the living room, the bedroom, or the conference room where the air conditioner is installed is acquired in step S201, that is, the real-time indoor environment humidity value acquired in the current process is acquired.

Preferably, the air conditioner is provided with a humidity sensor which can be used for detecting the current humidity value of the indoor environment. The sensing end of the humidity sensor can be arranged on the air inlet of the air conditioner or the outer wall of the shell, so that the current humidity value detected by the humidity sensor can be the same as or close to the actual humidity of the indoor environment, and the accuracy of the target operation frequency of the compressor determined according to the current humidity value is improved.

S202, determining a current temperature difference value between a current temperature value and a set temperature value and a current humidity difference value between a current humidity value and a set humidity value;

in this embodiment, the specific manner of determining the current temperature difference between the current temperature value and the set temperature value may refer to the embodiment shown in fig. 1, and the present invention is not described herein again.

For the parameter of the set humidity value, in the embodiment, when the air conditioner is started to operate, the user may input the target indoor environment humidity to be achieved through the remote controller or the control panel on the air conditioner body, that is, the set humidity value in the embodiment, for example, in a high-temperature working condition in summer, the user sets the target indoor environment humidity to be achieved through the remote controller to be 50 ℃, and then the relative humidity 50% is the set humidity value.

It should be understood that, if the user does not input the target indoor environment humidity value through the remote controller or the control panel, it is generally the default humidity value maintained when the air conditioner is turned off last time is the set humidity value, and if the set humidity value when the air conditioner is turned off last time is 55% of the relative humidity, under the condition that the air conditioner is turned on and operated this time and the user does not input the set humidity value, 55% of the relative humidity when the air conditioner is operated last time is the set humidity value of the process this time.

In the embodiment, under the high-temperature and high-humidity working condition in summer, the current humidity value of the indoor environment is generally higher than the set temperature value, so that the current humidity difference value is the difference value obtained by subtracting the set humidity value from the current humidity value; in winter, the current humidity value of the indoor environment is generally lower than the set humidity value, and therefore, the current humidity difference value is the difference value obtained by subtracting the current humidity value from the set humidity value. For convenience of calculation, the current humidity difference determined by the present invention is preferably an absolute value of a difference between the current humidity value and the set humidity value.

S203, determining a first operating frequency of the compressor according to the current temperature difference value, and determining a second operating frequency of the compressor according to the current humidity difference value;

s204, determining a target operation frequency of the compressor according to the first operation frequency and the second operation frequency;

similar to the embodiment shown in fig. 1, in this embodiment, the frequency adjustment process of the air conditioner compressor is performed multiple times in a set period, and therefore, in each period flow, the current temperature difference and the current humidity difference of the current period flow can be calculated and determined.

In an embodiment, the process of determining the first operating frequency of the compressor according to the current temperature difference value may refer to the embodiment shown in fig. 1, and the first operating frequency may be calculated by PID according to the following formula:

Hz1＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

Hz1 is the first operating frequency of humidity, Out _ gain is the output coefficient, Kp is the proportional control quantity, Ki is the integral control quantity, Kd is the derivative control quantity, D_nA first temperature deviation value for the current temperature difference value and the last determined first temperature difference value, D_n-1A second temperature deviation value, P, of the first temperature difference of humidity from a second temperature difference determined last time_nAs the difference in humidity and current temperature, P_n-1Is a first temperature difference of humidity, P_n-2Is the humidity second temperature difference.

In the present embodiment, the description is made with respect to the determination process of the humidity difference value.

In this embodiment, before the current humidity of the indoor environment reaches the set humidity, the air conditioner needs to repeatedly execute the process in the foregoing embodiment m times, taking the nth time as an example, and before determining the target operation frequency of the compressor in the nth cycle process, it needs to determine the current humidity difference determined in the cycle processes of the (n-1) th time and the (n-2) th time in advance; the current humidity difference value of the n-1 th time is the difference value between the current humidity value obtained in the cycle flow of the n-1 th time and the set humidity, and the current humidity difference value of the n-2 nd time is the difference value between the current humidity value obtained in the cycle flow of the n-2 th time and the set humidity.

For example, taking the refrigeration process of the high-temperature working condition in summer as an example, in the continuous three-cycle process, because the air-conditioning refrigeration mode is continuously operated, the current humidity value detected in the three cycles is gradually decreased, for example, the current humidity value for the n-2 th cycle is 64% of the relative humidity, the current humidity value for the n-1 st cycle is 62% of the relative humidity, the relative humidity value for the n-1 th cycle is 59% of the relative humidity, the set humidity value of the air conditioner is 50% of the relative humidity, the current humidity difference value for the n-2 nd cycle is 14% of the relative humidity, the current humidity difference value for the n-1 st cycle is 12% of the relative humidity, and the current.

In this way, a first humidity deviation value between the current humidity difference value and the first humidity difference value determined last time, that is, a humidity deviation value between the current humidity difference values of the current cycle flow and the previous cycle flow, may be further determined, for example, if the current cycle flow is the nth time, the first humidity deviation value may be determined to be 14% -12% to 2% according to the current humidity difference values of the nth time and the n-1 th time calculated in the foregoing embodiment.

Similarly, a second humidity deviation value between the first humidity difference and the second humidity difference determined last time, that is, the humidity deviation value between the current humidity difference of the last cycle flow of this time and the current humidity difference of the last cycle flow of this time may also be determined, for example, if the last cycle flow of this time is the (n-1) th cycle flow, and the last cycle flow of this time is the (n-2) th cycle flow, the second humidity deviation value may be determined to be 12% -9% to 3% according to the current humidity differences calculated in the foregoing embodiment for the (n-1) th and the (n-2) th cycles.

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 as the first humidity difference value and the current humidity difference value in the cycle flow of the (n-2) th time as the second humidity difference value in the previous embodiment.

Preferably, the relevant process steps of determining the target operation frequency of the compressor according to the current temperature difference are performed in n > 2 cycles, and because the time of each cycle is short, the changes of the indoor temperature and humidity and the outlet air temperature of 2 cycles before the air conditioner is started to operate are small, so the process steps of the invention mainly aim at the cycle process of n > 2 times and the subsequent cycle process thereof.

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

In this way, a second operating frequency of the compressor may be determined based on the first humidity deviation value and the second humidity deviation value.

Specifically, the second operating frequency of the compressor is obtained by performing PID calculation according to the following formula:

Hz2＝Out_gain*[Kp*d_n+Ki*p_n+Kd*(d_n－d_n-1)]；

wherein d is_n＝p_n–p_n-1，d_n-1＝p_n-1–p_n-2；

Hz2 is the second operating frequency, Out _ gain is the output coefficient, Kp is the proportional control quantity, Ki is the integral control quantity, Kd is the derivative control quantity, d_nA first humidity deviation value for the current humidity difference value and the last determined first humidity difference value, d_n-1A second humidity deviation value, p, for the first humidity difference value and a second humidity difference value determined last time_nIs said current humidity difference, p_n-1Is said first humidity difference, p_n-2Is the second humidity difference.

In the practical application of the air conditioner, the Out _ gain is an output coefficient of a compressor, and each compressor type corresponds to a determined output coefficient value; kp, Ki and Kd are calculation coefficients 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.

Therefore, the second operating frequency of the compressor can be calculated according to the calculation formula, and the target operating frequency of the compressor can be determined by combining the calculated first operating frequency. Preferably, the present invention uses the larger value of the first operating frequency and the second operating frequency as the target operating frequency of the compressor, and uses the target operating frequency as the set operating frequency of the compressor in the current cycle flow, and adjusts the actual operating frequency of the compressor or the operating frequency in the last cycle flow to the determined target operating frequency, so that the refrigerant quantity output by the air conditioner to the refrigerant circulation system of the air conditioner can meet the refrigerant quantity requirement of the air conditioner for cooling, heating or dehumidifying, and can be adapted to the current working condition, thereby achieving the effects of saving energy, reducing consumption and improving the overall performance of the air conditioner.

In this embodiment, the first operating frequency is a minimum operating frequency of the compressor required by the air conditioner for temperature control, and the second operating frequency is a minimum operating frequency of the compressor required by the air conditioner for humidity control.

In this embodiment, when the current temperature value reaches the set temperature value, the compressor may also be controlled to operate at the set minimum frequency, and the internal fan of the air conditioner operates at a low rotation speed, so that the indoor environment temperature may be maintained at the set temperature or at a temperature close to the set temperature, and consumption of electric energy and use cost of the air conditioner may be reduced.

In addition, in the adjustment process of the operation frequency of the compressor in the above embodiments, the outlet air temperature of the air conditioner is also affected along with the change of the amount of the refrigerant input to the indoor heat exchanger, for example, when the air conditioner is switched to the dehumidification mode operation, the operation frequency of the compressor is increased, and the input amount of the refrigerant is increased, the outlet air temperature of the air conditioner is also decreased, which causes discomfort to a user.

Generally, the existing electric heating device is mainly applied to the heating working condition in winter, but the electric heating device can be applied to the operation modes of refrigeration or dehumidification and the like, so that the utilization rate of the electric heating device is improved. Specifically, through opening or closing of adjustment electric heater unit to and the output frequency when opening, can realize the temperature control to the air-out air current that blows in indoor environment, and then realize the air conditioner with mode operation air-out air current constancy of temperature's such as dehumidification purpose, make under the condition that does not influence indoor refrigeration, avoid appearing because of the undulant problem of indoor temperature that mode switching etc. led to.

For the on-off control of electric heating and the adjustment of output power, the invention provides three adjustment modes: the first is to determine whether to turn on the electric heating and the output power when the electric heating is turned on according to the current humidity value; the second is to determine whether to start the electric heating and the output power when the electric heating is started according to the current temperature difference; and the third is to determine whether to turn on the electric heating and the output power when the electric heating is turned on according to the current temperature difference value and the current humidity value. The first of the three adjustment modes is mainly to adjust the operation of electric heating according to the current humidity value and the target humidity range of the indoor environment, so that the output power of the motor heat can preferentially meet the heat requirement of humidity adjustment of the air conditioner, and the method is suitable for the dehumidification operation mode of the air conditioner; the second method is that the operation of electric heating is adjusted according to the temperature difference between the current temperature value of the indoor environment and the target temperature range, so that the output power of the electric heating preferentially meets the heat requirement of the air conditioner for temperature adjustment, and the method is suitable for the cooling or heating operation mode of the air conditioner; the third is to combine the two modes, which is suitable for the heat demand with larger parameter difference and the refrigeration and dehumidification operation mode of the air conditioner.

Fig. 3 is a flowchart illustrating a method for controlling temperature and humidity of an air conditioner according to an exemplary embodiment of the present invention. In the application scenario shown in fig. 3, a related procedure for determining whether to turn on the electric heating and the output power when the electric heating is turned on according to the current humidity value is disclosed.

Specifically, as shown in fig. 3, the main steps of the first electrical heating adjustment method include:

s310, determining a target humidity range according to the set temperature value;

here, the correspondence relationship between the set temperature value and the target humidity range may be stored in advance, that is, for each set temperature, a plurality of human bodies may be tested, the humidity that the corresponding human body feels most comfortable is acquired, the humidity values corresponding to the set somatosensory comfort levels of the plurality of human body collected samples in the set area of the set temperature are acquired, the target humidity range corresponding to the set temperature is determined based on the plurality of humidity values, and the correspondence relationship is stored. For example: the set temperature is 25 ℃, and the humidity is between 40% and 60% at the moment, most users feel the most comfortable, so that the target humidity range corresponding to the set temperature of 25 ℃ can be determined by the humidity of 40% to 60%, and the set temperature of 25 ℃ and the target humidity range are stored

40% -60% of each other.

Thus, the stored correspondence between the set temperature and the target humidity range can be as shown in table 1:

TABLE 1

Here, the current target humidity range corresponding to the current set temperature of the air conditioner may be determined according to the correspondence between the stored preset temperature and the target temperature and humidity range. As shown in table 1, the currently set temperature is 28 °, and the current target humidity range is acquired to be 30% -60%.

S321, controlling to start electric heating when the current humidity value is not in the target humidity range;

in this embodiment, when the current humidity value is not within the target humidity range, the output of the amount of refrigerant is increased after the operation frequency of the compressor is adjusted in the foregoing embodiment, or when the air conditioner needs to be switched to the dehumidification mode, and the amount of refrigerant flowing through the indoor heat exchanger is also changed accordingly, so that the temperature of the air outlet of the air conditioner is changed, and the outlet air temperature is decreased, the electric heating needs to be turned on, and heat is transferred to the outlet air flow to compensate for the temperature of the outlet air flow decreased due to the increase of the amount of refrigerant.

In an embodiment, the current humidity value is not in the target humidity range, including that the current humidity value is lower than the lower limit of the target humidity range, and the current humidity value is higher than the upper limit of the target humidity range, for example, the target humidity range corresponding to a certain set temperature is (RH1, RH2), and the current humidity value is RH, then the condition of turning on the electric heating can be satisfied when RH < RH1 or RH > RH 2.

S322, when the current humidity value is in the target humidity range, not starting electric heating;

for example, in the case where the current humidity value RH1 < RH2, the condition that the electric heating is not turned on is satisfied.

Generally, the judgment process of determining whether to start the electric heating according to the humidity value is carried out in each cycle process, so that if the current humidity value meets the condition of not starting the electric heating in the first cycle process of starting the air conditioner to run, the electric heating is not started; if the first cycle flow meets the condition of starting electric heating, and a certain subsequent cycle flow except the first cycle flow meets the condition of not starting electric heating, the electric heating is not closed in the current certain cycle flow, and the current output power of the electric heating is generally kept unchanged in the cycle and the subsequent cycle flow, so that the requirement of a user on the indoor humidity is met in the cycle, and the heat output by the electric heating can compensate the reduction change of the outlet air temperature caused by the adjustment of the running power of the compressor during the air conditioner working in the cycle and the subsequent cycle.

Similarly, the other two control methods of electric heating in the subsequent embodiments may also be similar to the present embodiment.

In another embodiment, a related process for determining whether to turn on the electric heating and the output power when the electric heating is turned on according to the current temperature difference is disclosed; specifically, the second electrical heating adjustment method mainly includes the steps of: when the current temperature difference value is not within the target temperature difference range, controlling to start electric heating; and when the current temperature difference value is within the target temperature difference range, the electric heating is not started.

Here, the air conditioning system prestores a target temperature difference range, and when the current temperature difference is not within the target humidity range, after the operating frequency of the compressor is adjusted in the foregoing embodiment, the output of the refrigerant quantity increases, and the quantity of the refrigerant flowing through the indoor heat exchanger also changes, so that the temperature of the air outlet of the air conditioner changes, and the outlet air temperature decreases, it is necessary to turn on the electric heating and transfer heat to the outlet air flow to compensate the temperature of the outlet air flow that decreases due to the increase of the refrigerant quantity.

For example, a certain settingThe target temperature difference range of (2) is a target humidity range P corresponding to the temperature_nNot less than 2 ℃, namely the current humidity value is P_nWhen P is present_nUnder the condition of less than 2 ℃, the condition of electric heating starting can be satisfied. When P is_nThe condition that the electric heating is not started can be met under the condition that the temperature is more than or equal to 2 ℃.

Fig. 4 is a fourth flowchart illustrating an air conditioner temperature and humidity dual control method according to an exemplary embodiment of the present invention. In the application scenario shown in fig. 4, a relevant procedure for determining whether to turn on the electric heating and the output power when the electric heating is turned on according to the current temperature difference value and the current humidity value is disclosed.

Specifically, as shown in fig. 4, the main steps of the third adjustment mode of electrical heating include:

s410, determining a target temperature difference range and a target humidity range according to a set temperature value;

similar to the embodiment shown in fig. 3, the corresponding relationship among the set temperature value, the target temperature difference range and the target humidity range may also be stored in advance, as shown in table 2:

set temperature	Target temperature difference range	Target humidity range
			30℃	The temperature difference is more than or equal to 2 DEG C	The humidity is 30 to 50 percent
28℃	The temperature difference is more than or equal to 2 DEG C	The humidity is 30 to 60 percent
			…	…	…
25℃	The temperature difference is more than or equal to 2 DEG C	Humidity is 40-60%
			…	…	…

TABLE 2

Here, the current target humidity range corresponding to the current set temperature of the air conditioner may be determined according to the correspondence between the stored preset temperature and the target temperature and humidity range. As shown in table 2, the current set temperature is 28 °, the obtained target temperature difference range is 2 ℃ or more, and the current target humidity range is 30% -60%.

S421, when the target temperature difference value is not within the target temperature difference range and the current humidity value is not within the target humidity range, controlling to start electrical heating;

in this embodiment, when the target temperature difference is not within the target temperature difference range and the current humidity value is not within the target humidity range, the output of the refrigerant quantity is increased after the operation frequency of the compressor is adjusted in the foregoing embodiment, and the refrigerant quantity flowing through the indoor heat exchanger is also changed accordingly, so that the temperature of the air outlet of the air conditioner is changed, and the outlet air temperature is reduced, the electric heating needs to be turned on, and heat is transferred to the outlet air flow, so as to compensate the temperature of the outlet air flow reduced due to the increase of the refrigerant quantity.

In an embodiment, when the target temperature difference value is not within the target temperature difference range, the current temperature difference value is lower than the lower limit of the target temperature range, and the current temperature difference value is higher than the upper limit of the target temperature range; the current humidity value not being in the target humidity range includes the current humidity value being lower than the target humidityThe lower limit of the range, and the upper limit of the target humidity range, where the current humidity value is higher than the target humidity range, for example, the target temperature difference range corresponding to a certain set temperature is greater than or equal to 2 ℃, and the target humidity range is (RH1, RH 2); the current temperature difference is P_nWhen the current humidity value is RH, then P is_nThe conditions of electric heating start can be satisfied when the temperature is less than 2 ℃ and RH is less than RH1 or RH is more than RH 2.

And S422, when the target temperature difference value is within the target temperature difference range and/or the current humidity value is within the target humidity range, not starting electric heating.

For example, when P_nThe condition that the electric heating is not started can be met under the conditions that the temperature is more than or equal to 2 ℃ and/or RH1 is more than RH and less than RH 2.

In addition, by combining the control modes of the compressor and the electric heating provided in the foregoing embodiments, the temperature and humidity dual control effect of the air conditioner can be achieved by adjusting the compressor and the electric heating.

FIG. 5 is a flow chart illustrating a method of temperature and humidity double control according to the present invention, in accordance with an exemplary embodiment; in the application scenario shown in fig. 5, the specific control flow for the air conditioner to realize temperature and humidity control is as follows:

s501, the air conditioner obtains 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 air conditioner 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;

s502, determining a current temperature difference value between a current temperature value and a set temperature value;

in this embodiment, preferably, the absolute value of the difference between the determined current temperature difference value and the set temperature value is calculated in multiple modes of air conditioner operation, such as refrigeration, heating, dehumidification and the like;

s503, determining a first temperature deviation value of the current temperature difference value and the first temperature difference value determined last time; and a second temperature deviation value of the first temperature difference value and a second temperature difference value determined last time;

in this embodiment, the overall process of the present invention may be repeated periodically for multiple times, and then in each periodic process, the current temperature difference corresponding to each period may be determined, where the present invention is to obtain the current temperature difference determined in two periods before the process of the present period, and calculate to obtain the first temperature deviation value and the second temperature deviation value according to the current temperature differences of the present period and the previous two periods;

s504, carrying out PID calculation according to the following formula to obtain the target operating frequency of the air-conditioning compressor:

Hzout＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

Hzout is target operating frequency, Out _ gain is output coefficient, Kp is proportional control quantity, Ki is integral control quantity, Kd is differential control quantity, D_nA first temperature deviation value for the current temperature difference value and the last determined first temperature difference value, D_n-1A second temperature deviation value, P, of the first temperature difference value and a second temperature difference value determined last time_nFor the current temperature difference, P_n-1Is a first temperature difference, P_n-2Is a second temperature difference;

s505, determining a target humidity range according to the set temperature value;

in this embodiment, the air conditioning system pre-stores the corresponding relationship between the set temperature value and the target humidity range, as shown in table 1 in the foregoing embodiment; therefore, according to the corresponding relation stored in table 1, the target humidity range corresponding to the set temperature value can be searched and obtained;

s506, judging whether the current humidity value is in the target humidity range, if so, executing a step S507, otherwise, executing a step S508;

s507, not starting electric heating;

s508, calculating and determining the output power of the electric heating, and starting the electric heating according to the output power;

s509, controlling a compressor of the air conditioner to run at a target running frequency;

s510, judging whether the current temperature value reaches a set temperature value, if so, executing a step S511, and if not, continuing to execute a step S509;

s511, controlling the compressor to operate at a set minimum frequency, and controlling an internal fan of the air conditioner to operate at a low rotating speed;

and S512, ending the process.

It should be understood that the control steps of steps S505 to S508 may be performed synchronously with steps S502 to S504, or asynchronously, that is, after the target operating frequency of the compressor, step S509 may be controlled to be performed; meanwhile, after the judgment of the electric heating is made, the operation of turning on or turning off the electric heating can be controlled.

FIG. 6 is a flow chart illustrating a method of temperature and humidity double control according to the present invention, in accordance with an exemplary embodiment; in the application scenario shown in fig. 6, the specific control flow for the air conditioner to realize temperature and humidity control is as follows:

s601, the air conditioner obtains a current temperature value and a current humidity value of a space where the air conditioner is located;

s602, determining a current temperature difference value between a current temperature value and a set temperature value and a current humidity difference value between a current humidity value and a set humidity value;

similarly, calculating the absolute value of the difference between the determined current humidity difference value and the set humidity value;

s603, determining a first temperature deviation value of the current temperature difference value and the first temperature difference value determined last time; and a second temperature deviation value of the first temperature difference value and a second temperature difference value determined last time, and executing step S604;

s604, performing PID calculation according to the following formula to obtain a first operating frequency of the air-conditioning compressor:

Hz1＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

Hz1 is the first operating frequency, Out _ gain is the output coefficient, Kp is the proportional control quantity, Ki is the integral control quantity, Kd is the derivative control quantity, D_nA first temperature deviation value for the current temperature difference value and the last determined first temperature difference value, D_n-1A second temperature deviation value, P, of the first temperature difference value and a second temperature difference value determined last time_nFor the current temperature difference, P_n-1Is a first temperature difference, P_n-2Is a second temperature difference;

s605, determining a first humidity deviation value of the current humidity difference value and the first humidity difference value determined last time; and a second humidity deviation value of the first humidity difference value and the second humidity difference value determined last time, and executing step S606;

in this embodiment, the overall process of the present invention may be repeated periodically for multiple times, and then in each periodic process, the current humidity difference corresponding to each period may be determined, where the present invention obtains the current temperature difference determined in two periods before the current periodic process, and may calculate to obtain the first humidity deviation value and the second humidity deviation value according to the current temperature differences of the current period and the previous two periods;

s606, carrying out PID calculation according to the following formula to obtain a second operating frequency of the air-conditioning compressor:

Hz2＝Out_gain*[Kp*d_n+Ki*p_n+Kd*(d_n－d_n-1)]；

wherein d is_n＝p_n–p_n-1，d_n-1＝p_n-1–p_n-2；

Hz2 is the second operating frequency, Out _ gain is the output coefficient, Kp is the proportional control quantity, Ki is the integral control quantity, Kd is the derivative control quantity, d_nA first humidity deviation value for the current humidity difference value and the last determined first humidity difference value, d_n-1A second humidity deviation value, p, for the first humidity difference value and a second humidity difference value determined last time_nAs the current humidity difference, p_n-1Is a first humidity difference, p_n-2Is a second humidity difference;

s607, judging whether the first running frequency is larger than the second running frequency, if so, executing the step S608, and if not, executing the step S609;

s608, determining the first operating frequency as a target operating frequency of the compressor;

s609, determining a second operating frequency as a target operating frequency of the compressor;

s610, judging whether the current humidity value is in the target humidity range, if so, executing a step S611, otherwise, executing a step S612;

s611, not starting electric heating;

s612, calculating and determining the output power of the electric heating, and starting the electric heating according to the output power;

s613, controlling a compressor of the air conditioner to run at a target running frequency;

s614, judging whether the current temperature value reaches the set temperature value, if so, executing the step S615, otherwise, continuing to execute the step S613;

s615, controlling the compressor to operate at a set minimum frequency, and operating an internal fan of the air conditioner at a low rotating speed;

and S616, ending the process.

FIG. 7 is a flow chart illustrating a method of temperature and humidity double control according to the present invention, in accordance with an exemplary embodiment; in the application scenario shown in fig. 7, the specific control flow for the air conditioner to realize temperature and humidity control is as follows:

s701, the air conditioner obtains a current temperature value and a current humidity value of a space where the air conditioner is located;

s702, determining a current temperature difference value between a current temperature value and a set temperature value and a current humidity difference value between a current humidity value and a set humidity value;

s703, determining a first temperature deviation value of the current temperature difference value and the first temperature difference value determined last time; and a second temperature deviation value of the first temperature difference value and a second temperature difference value determined last time, and execute step S704;

s704, carrying out PID calculation according to the following formula to obtain a first operating frequency of the air-conditioning compressor:

Hz1＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

s705, determining a first humidity deviation value of the current humidity difference value and the first humidity difference value determined last time; and a second humidity deviation value of the first humidity difference value and a second humidity difference value determined last time, and executing step S706;

s706, performing PID calculation according to the following formula to obtain a second operating frequency of the air-conditioning compressor:

Hz2＝Out_gain*[Kp*d_n+Ki*p_n+Kd*(d_n－d_n-1)]；

wherein d is_n＝p_n–p_n-1，d_n-1＝p_n-1–p_n-2；

s707, judging whether the first running frequency is larger than the second running frequency, if so, executing the step S708, and if not, executing the step S709;

s708, determining a first operating frequency as a target operating frequency of the compressor;

s709, determining a second operating frequency as a target operating frequency of the compressor;

s710, judging whether the current temperature difference value is within the target temperature difference range, if so, executing a step S711, otherwise, executing a step S712;

s711, electric heating is not started;

s712, calculating and determining the output power of the electric heating, and starting the electric heating according to the output power;

s713, controlling a compressor of the air conditioner to run at a target running frequency;

s714, judging whether the current temperature value reaches a set temperature value, if so, executing a step S715, otherwise, continuing to execute the step S713;

s715, controlling the compressor to operate at a set minimum frequency, and operating an internal fan of the air conditioner at a low rotating speed;

s716, the flow ends.

FIG. 8 is a flow chart illustrating a method of temperature and humidity double control according to the present invention, in accordance with an exemplary embodiment; in the application scenario shown in fig. 8, the specific control flow for the air conditioner to realize temperature and humidity control is as follows:

s801, the air conditioner acquires a current temperature value and a current humidity value of a space where the air conditioner is located;

s802, determining a current temperature difference value between a current temperature value and a set temperature value and a current humidity difference value between a current humidity value and a set humidity value;

s803, determining a first temperature deviation value of the current temperature difference value and the first temperature difference value determined last time; and a second temperature deviation value of the first temperature difference value and a second temperature difference value determined last time, and executing step S804;

s804, performing PID calculation according to the following formula to obtain a first operating frequency of the air-conditioning compressor:

Hz1＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

s805, determining a first humidity deviation value of the current humidity difference value and the first humidity difference value determined last time; and a second humidity deviation value of the first humidity difference value and the second humidity difference value determined last time, and execute step S806;

s806, carrying out PID calculation according to the following formula to obtain a second operating frequency of the air-conditioning compressor:

Hz2＝Out_gain*[Kp*d_n+Ki*p_n+Kd*(d_n－d_n-1)]；

wherein d is_n＝p_n–p_n-1，d_n-1＝p_n-1–p_n-2；

Hz2 is the second operating frequency, Out _ gain is the output coefficient, Kp is the proportional control quantity, Ki is the integral control quantity, Kd is the derivative control quantity, d_nA first humidity deviation value for the current humidity difference value and the last determined first humidity difference value, d_n-1A second humidity deviation value, p, for the first humidity difference value and a second humidity difference value determined last time_nAs the current humidity difference, p_n-1Is a first humidity difference，p_n-2Is a second humidity difference;

s807, judging whether the first running frequency is greater than the second running frequency, if so, executing a step S808, and if not, executing a step S809;

s808, determining the first operating frequency as a target operating frequency of the compressor;

s809, determining the second operating frequency as the target operating frequency of the compressor;

s810, determining a target temperature difference range and a target humidity range according to the set temperature value;

in this embodiment, the air conditioning system prestores a corresponding relationship between a set temperature value and a target temperature difference range, as shown in table 2 in the foregoing embodiment; therefore, according to the corresponding relationship stored in table 2, the target temperature difference range and the target humidity range corresponding to the set temperature value can be searched and obtained;

s811, judging whether the target temperature difference value is in the target temperature difference range and/or the current humidity value is in the target humidity range, if so, executing the step S812, otherwise, executing the step S813;

s812, not starting electric heating;

s813, calculating and determining the output power of the electric heating, and starting the electric heating according to the output power;

s814, controlling a compressor of the air conditioner to run at a target running frequency;

s815, judging whether the current temperature value reaches a set temperature value, if so, executing a step S816, otherwise, continuing to execute the step S814;

s816, controlling the compressor to run at a set minimum frequency, and controlling an inner fan of the air conditioner to run at a low rotating speed;

and S817, ending the process.

FIG. 9 is a flow chart illustrating a method of temperature and humidity double control according to the present invention, in accordance with an exemplary embodiment; in the application scenario shown in fig. 9, the specific control flow for the air conditioner to realize temperature and humidity control is as follows:

s901, the air conditioner acquires the current temperature value and the current humidity value of the space where the air conditioner is located;

s902, determining a current temperature difference value between a current temperature value and a set temperature value;

s903, determining a first temperature deviation value of the current temperature difference value and the first temperature difference value determined last time; and a second temperature deviation value of the first temperature difference value and a second temperature difference value determined last time;

s904, carrying out PID calculation according to the following formula to obtain the target operating frequency of the air-conditioning compressor:

Hzout＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

Hzout is target operating frequency, Out _ gain is output coefficient, Kp is proportional control quantity, Ki is integral control quantity, Kd is differential control quantity, D_nA first temperature deviation value for the current temperature difference value and the last determined first temperature difference value, D_n-1For the first temperature difference and the second temperature determined last timeSecond temperature deviation value of degree difference, P_nFor the current temperature difference, P_n-1Is a first temperature difference, P_n-2Is a second temperature difference;

s905, determining a target temperature difference range and a target humidity range according to a set temperature value;

s906, judging whether the target temperature difference value is in the target temperature difference range and/or the current humidity value is in the target humidity range, if so, executing a step S907, otherwise, executing a step S908;

s907, electric heating is not started;

s908, calculating and determining the output power of the electric heating, and starting the electric heating according to the output power;

s909, controlling a compressor of the air conditioner to run at a target running frequency;

s910, judging whether the current temperature value reaches the set temperature value, if so, executing the step S911, otherwise, continuing to execute the step S909;

s911, controlling the compressor to run at a set minimum frequency, and controlling an inner fan of the air conditioner to run at a low rotating speed;

and S912, ending the process.

In an embodiment of the present invention, the present invention provides a device for controlling temperature and humidity of an air conditioner, and the air conditioner provided with the device can be used for executing the temperature and humidity control process shown in fig. 5.

Specifically, the temperature and humidity double-control device comprises:

the acquisition module is used for acquiring the current temperature value and the current humidity value of the space where the air conditioner is located;

the first determining module is used for determining a current temperature difference value between a current temperature value and a set temperature value;

and the second determining module is used for determining the target operating frequency of the compressor according to the current temperature difference value and determining whether to start the electric heating and the output power when the electric heating is started according to the current humidity value.

In this embodiment, the second determining module includes:

the first determining submodule is used for determining a first temperature deviation value of the previous temperature difference value and the first temperature difference value determined last time; and a second temperature deviation value of the first temperature difference value and a second temperature difference value determined last time;

and the second determining submodule is used for determining the target operating frequency of the compressor according to the first temperature deviation value and the second temperature deviation value.

In this embodiment, the second determining submodule is configured to perform PID calculation according to the following formula to obtain the target operating frequency:

Hzout＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

In this embodiment, the apparatus further comprises a control module configured to: when the current temperature value reaches the set temperature value, the compressor is controlled to operate at the set minimum frequency, and the inner fan of the air conditioner operates at a low rotating speed.

In this embodiment, the second determining module further includes:

the third determining submodule is used for determining a target humidity range according to the set temperature value;

the fourth determination submodule is used for controlling to start the electric heating when the current humidity value is not in the target humidity range; and when the current humidity value is in the target humidity range, not starting the electric heating.

In another embodiment of the present invention, the present invention provides a device for controlling temperature and humidity of an air conditioner, and the air conditioner provided with the device can be used for executing the temperature and humidity control process shown in fig. 6.

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 first determining unit is used for determining a current temperature difference value between the current temperature value and the set temperature value and a current humidity difference value between the current humidity value and the set humidity value;

the second determining unit is used for determining the first operating frequency of the compressor according to the current temperature difference value and determining the second operating frequency of the compressor according to the current humidity difference value;

a third determining unit for determining a target operating frequency of the compressor according to the first operating frequency and the second operating frequency;

and the fourth determining unit is used for determining whether to start the electric heating and the output power when the electric heating is started according to the current humidity value.

In this embodiment, the second determining module includes:

and the second determining submodule is used for determining the first operating frequency of the compressor according to the first temperature deviation value and the second temperature deviation value.

In this embodiment, the second determining submodule is configured to perform PID calculation according to the following formula to obtain the first operating frequency:

Hz1＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

Hz1 is target operation frequency, Out _ gain is output coefficient, Kp is proportional control quantity, Ki is integral control quantity, Kd is differential control quantity, D_nA first temperature deviation value for the current temperature difference value and the last determined first temperature difference value, D_n-1A second temperature deviation value, P, of the first temperature difference value and a second temperature difference value determined last time_nFor the current temperature difference, P_n-1Is a first temperature difference, P_n-2Is the second temperature difference.

The second determining module further includes:

the third determining submodule is used for determining a first humidity deviation value of the previous humidity difference value and the first humidity difference value determined last time; and a second humidity deviation value of the first humidity difference value and a second humidity difference value determined last time;

and the fourth determining submodule is used for determining a second operating frequency of the compressor according to the first humidity deviation value and the second humidity deviation value.

In this embodiment, the fourth determining submodule performs PID calculation according to the following formula to obtain the second operating frequency:

Hz2＝Out_gain*[Kp*d_n+Ki*p_n+Kd*(d_n－d_n-1)]；

wherein d is_n＝p_n–p_n-1，d_n-1＝p_n-1–p_n-2；

Hz2 is the second operating frequency, Out _ gain is the output coefficient, Kp is the proportional control quantity, Ki is the integral control quantity, Kd is the derivative control quantity, d_nA first humidity deviation value for the current humidity difference value and the last determined first humidity difference value, d_n-1A second humidity deviation value, p, for the first humidity difference value and a second humidity difference value determined last time_nAs the current humidity difference, p_n-1Is a first humidity difference, p_n-2Is the second humidity difference.

In this embodiment, the third determining module is configured to determine that the larger of the first operating frequency and the second operating frequency is the target operating frequency of the compressor.

In this embodiment, the apparatus further includes a first control module, configured to control the compressor to operate at a set minimum frequency when the current temperature value reaches a set temperature value, and the inner fan of the air conditioner operates at a low rotation speed.

In this embodiment, the fourth determining module includes:

the fifth determining submodule is used for determining a target humidity range according to the set temperature value;

the second control module is used for controlling to start the electric heating when the current humidity value is not in the target humidity range; and

and when the current humidity value is in the target humidity range, the electric heating is not started.

In another embodiment of the present invention, the present invention provides a device for controlling temperature and humidity of an air conditioner, and the air conditioner provided with the device can be used for executing the temperature and humidity control process shown in fig. 7.

Specifically, the temperature and humidity double-control device comprises:

and the fourth determining unit is used for determining whether to start the electric heating and the output power when the electric heating is started according to the current temperature difference.

In this embodiment, the second determining module includes:

Hz1＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

Hz1 is the first operating frequency, Out _ gain is the output coefficient, Kp is the proportional control quantity, Ki is the integral control quantity, Kd is the derivative control quantity, D_nA first temperature deviation value for the current temperature difference value and the last determined first temperature difference value, D_n-1A second temperature deviation value, P, of the first temperature difference value and a second temperature difference value determined last time_nFor the current temperature difference, P_n-1Is a first temperature difference, P_n-2Is the second temperature difference.

In this embodiment, the second determining module further includes:

In this embodiment, the fourth determining submodule is configured to perform PID calculation according to the following formula to obtain the second operating frequency:

Hz2＝Out_gain*[Kp*d_n+Ki*p_n+Kd*(d_n－d_n-1)]；

wherein d is_n＝p_n–p_n-1，d_n-1＝p_n-1–p_n-2；

In this embodiment, the third determination submodule is configured to set a larger one of the first operating frequency and the second operating frequency as the target operating frequency of the compressor.

In this embodiment, the fourth determining module is configured to control to turn on the electrical heating when the current temperature difference value is not within the target temperature difference range; and when the current temperature difference value is within the target temperature difference range, the electric heating is not started.

In another embodiment of the present invention, the present invention provides a device for controlling temperature and humidity of an air conditioner, and the air conditioner provided with the device can be used for executing the temperature and humidity control process shown in fig. 8.

Specifically, the temperature and humidity double-control device comprises:

the first determination module is used for determining a current temperature difference value between a current temperature value and a set temperature value and a current humidity difference value between a current humidity value and a set humidity value;

the second determining module is used for determining the first operating frequency of the compressor according to the current temperature difference value and determining the second operating frequency of the compressor according to the current humidity difference value;

the third determining module is used for determining the target operating frequency of the compressor according to the first operating frequency and the second operating frequency;

and the fourth determining module is used for determining whether to start the electric heating and the output power when the electric heating is started according to the current temperature difference value and the current humidity value.

In this embodiment, the second determining module includes:

Hz1＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

In this embodiment, the second determining module further includes:

Hz2＝Out_gain*[Kp*d_n+Ki*p_n+Kd*(d_n－d_n-1)]；

wherein d is_n＝p_n–p_n-1，d_n-1＝p_n-1–p_n-2；

In this embodiment, the fourth determining module includes:

the fifth determining submodule is used for determining a target temperature difference range and a target humidity range according to the set temperature value;

the second control module is used for controlling to start the electric heating when the target temperature difference value is not within the target temperature difference range and the current humidity value is not within the target humidity range; and

and when the target temperature difference value is within the target temperature difference range and/or the current humidity value is within the target humidity range, the electric heating is not started.

In another embodiment of the present invention, the present invention provides a device for controlling temperature and humidity of an air conditioner, and the air conditioner provided with the device can be used for executing the temperature and humidity control process shown in fig. 9.

Specifically, the temperature and humidity double-control device comprises:

and the second determining module is used for determining the target operating frequency of the compressor according to the current temperature difference value, and determining whether to start the electric heating and the output power when the electric heating is started according to the current temperature difference value and the current humidity value.

In this embodiment, the second determining module includes:

Hzout＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

Hzout is target operating frequency, Out _ gain is output coefficient, Kp is proportional control quantity, Ki is integral control quantity, Kd is differential control quantity, D_nFor the current temperature difference and the last determined first temperature differenceFirst deviation of temperature, D_n-1A second temperature deviation value, P, of the first temperature difference value and a second temperature difference value determined last time_nFor the current temperature difference, P_n-1Is a first temperature difference, P_n-2Is the second temperature difference.

In this embodiment, the apparatus further includes a first control module configured to: when the current temperature value reaches the set temperature value, the compressor is controlled to operate at the set minimum frequency, and the inner fan of the air conditioner operates at a low rotating speed.

In this embodiment, the apparatus further comprises:

the third determining submodule is used for determining a target temperature difference range and a target humidity range according to the set temperature value;

a second control module to: when the target temperature difference value is not within the target temperature difference range and the current humidity value is not within the target humidity range, controlling to start electric heating; and

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

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 the air conditioner is located;

determining a current temperature difference value between a current temperature value and a set temperature value and a current humidity difference value between a current humidity value and a set humidity value;

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

and carrying out PID calculation according to the following formula to obtain the target operating frequency:

Hzout＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

Hzout is the target operating frequency, Out _ gain is the output coefficient, Kp is the proportional control quantity, Ki is the integral control quantity, Kd is the derivative control quantity, D_nA first temperature deviation value for the current temperature difference value and the last determined first temperature difference value, D_n-1A second temperature deviation value, P, of the first temperature difference value from a second temperature difference value determined last time_nIs said current temperature difference, P_n-1Is said first temperature difference, P_n-2Is the second temperature difference;

and determining whether to start the electric heating and the output power when the electric heating is started according to the current temperature difference value and the current humidity value.

2. The method for controlling temperature and humidity of an air conditioner according to claim 1, further comprising:

and when the current temperature value reaches the set temperature value, controlling the compressor to operate at the set minimum frequency, and operating the inner fan of the air conditioner at a low rotating speed.

3. The method for controlling temperature and humidity of an air conditioner according to claim 1, wherein the determining whether to turn on electric heating according to the current temperature difference value and the humidity value comprises:

determining a target temperature difference range and a target humidity range according to the set temperature value;

when the target temperature difference value is not within the target temperature difference range and the current humidity value is not within the target humidity range, controlling to start electrical heating;

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

the second determining module is used for determining the target operation frequency of the compressor according to the current temperature difference value, and determining whether to start electric heating and the output power when the electric heating is started according to the current temperature difference value and the current humidity value;

wherein the second determining module comprises:

the first determining submodule is used for determining a first temperature deviation value of the current temperature difference value and the first temperature difference value determined last time; and a second temperature deviation value of the first temperature difference value and a second temperature difference value determined last time;

the second determining submodule is used for carrying out PID calculation according to the following formula to obtain the target operating frequency:

Hzout＝Out_gain*[Kp*D_n+Ki*P_n+Kd*(D_n－D_n-1)]；

wherein D is_n＝P_n–P_n-1，D_n-1＝P_n-1–P_n-2；

Hzout is the target operating frequency, Out _ gain is the output coefficient, Kp is the proportional control quantity, Ki is the integral control quantity, Kd is the derivative control quantity, D_nA first temperature deviation value for the current temperature difference value and the last determined first temperature difference value, D_n-1A second temperature deviation value, P, of the first temperature difference value from a second temperature difference value determined last time_nIs said current temperature difference, P_n-1Is said first temperature difference, P_n-2Is the second temperature difference.

5. The device for controlling temperature and humidity of air conditioner according to claim 4, further comprising a first control module for:

6. The device for controlling temperature and humidity of air conditioner according to claim 4, further comprising:

the third determining subunit is used for determining a target temperature difference range and a target humidity range according to the set temperature value;

a second control module to: when the target temperature difference value is not within the target temperature difference range and the current humidity value is not within the target humidity range, controlling to start electrical heating; and