Disclosure of Invention
The invention provides an air conditioner control method based on temperature and cold feeling, which is used for adjusting air parameters of an air-conditioning room according to the subjective comfort level of people, the distance between the people and an air conditioner and the relation between the ambient temperature and the air outlet temperature which are accurately detected, so that the comfortable air-conditioning room environment for the people is formed.
A control method of an air conditioner based on temperature and cold feeling, wherein the air conditioner works in a cooling mode, and the control method comprises the following steps:
the method comprises the following steps of detecting subjective temperature and cold feeling of a heat source in an air-conditioning room in real time, wherein the subjective temperature and cold feeling is detected by the following method:
sampling the body surface temperature T of the heat source in the air-conditioned room and the ambient temperature T of the air-conditioned room0Dressing index of heat source in air-conditioned room Iclo,
The body surface temperature T and the ambient temperature T of the air conditioner0And an air conditionerDressing index of heat source in room IcloSubstituting the following formula, and calculating the heat dissipation X of the surface of the heat source body; x = (h/(1 +0.18h I)clo))(T- T0) Wherein h = hr+ hc, hrFor radiative heat conductivity, hcIs convective heat transfer rate;
the body surface temperature T and the ambient temperature T of the air conditioner0And dressing index I of heat source in air-conditioned roomcloSubstituting the following formula to calculate the dressing compensation coefficient Tr,Tr=( Iclo/(T- T0))- T0/ T;
Judging whether the heat dissipation capacity of the body surface is greater than the set heat dissipation capacity:
if the heat dissipation capacity is larger than the set heat dissipation capacity, substituting the body surface heat dissipation capacity X and the dressing compensation coefficient Tr into the following formula, and calculating the subjective temperature and cold feeling Y:
Y=-k1X+Q1+Tr;
if the heat dissipation capacity is less than or equal to the set heat dissipation capacity, substituting the body surface heat dissipation capacity X and the dressing compensation coefficient Tr into the following formula, and calculating the subjective temperature and cold feeling Y:
Y=-k2X+Q2+Tr(ii) a Wherein k is1< k2,Q1<Q2
And judging the subjective temperature and cold feeling grade according to the numerical value of the subjective temperature and cold feeling Y.
When the body surface heat dissipation amount is higher or lower than the set heat dissipation amount, the detection value of the subjective temperature and cold feeling is corrected by using two different correction formulas, so that the detection value can be accurately detected, and particularly, the actual subjective temperature and cold feeling of the human body under the conditions of high body surface heat dissipation amount, high environmental temperature and high body surface temperature can be accurately detected, the probability of misjudgment is reduced, and an accurate data basis is provided for subsequent control.
Meanwhile, the air conditioner adopts an air conditioner control method based on temperature and cold feeling. The air conditioner works in a cooling mode, and the control method comprises the following steps:
the method comprises the following steps of detecting subjective temperature and cold feeling of a heat source in an air-conditioning room in real time, wherein the subjective temperature and cold feeling is detected by the following method:
sampling the body surface temperature T of the heat source in the air-conditioned room and the ambient temperature T of the air-conditioned room0Dressing index of heat source in air-conditioned room Iclo,
The body surface temperature T and the ambient temperature T of the air conditioner0And dressing index I of heat source in air-conditioned roomcloSubstituting the following formula, and calculating the heat dissipation X of the surface of the heat source body; x = (h/(1 +0.18h I)clo))(T- T0) Wherein h = hr+ hc, hrFor radiative heat conductivity, hcIs convective heat transfer rate;
the body surface temperature T and the ambient temperature T of the air conditioner0And dressing index I of heat source in air-conditioned roomcloSubstituting the following formula to calculate the dressing compensation coefficient Tr,Tr=( Iclo/(T- T0))- T0/ T;
Judging whether the heat dissipation capacity of the body surface is greater than the set heat dissipation capacity:
if the heat dissipation capacity is larger than the set heat dissipation capacity, substituting the body surface heat dissipation capacity X and the dressing compensation coefficient Tr into the following formula, and calculating the subjective temperature and cold feeling Y:
Y=-k1X+Q1+Tr;
if the heat dissipation capacity is less than or equal to the set heat dissipation capacity, substituting the body surface heat dissipation capacity X and the dressing compensation coefficient Tr into the following formula, and calculating the subjective temperature and cold feeling Y:
Y=-k2X+Q2+Tr(ii) a Wherein k is1< k2,Q1<Q2
And judging the subjective temperature and cold feeling grade according to the numerical value of the subjective temperature and cold feeling Y.
The air conditioner disclosed by the invention has the advantages of high comfort degree and good intelligent degree.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the structure of a first feature described below as "on" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.
In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
The present invention discloses a method for controlling an air conditioner based on temperature and cold feeling, which is described in detail below with reference to the accompanying drawings. The control method disclosed in the present embodiment is directed to the summer operation of the air conditioner, and the air conditioner operates in a cooling mode. After the air conditioner is turned on, the control algorithm as disclosed in the background art is preferably executed.
An infrared sensor which can collect the absolute temperature and thermal image of the heat source is arranged on the air conditioner. The method for determining the subjective temperature and cold feeling of a heat source in an air-conditioning room through the detection value of an infrared sensor specifically comprises the following steps:
step S102, sampling the body surface temperature T of a heat source in an air-conditioning room and the environment temperature T of the air-conditioning room0Dressing index of heat source in air-conditioned room Iclo。
The heat source in the air-conditioned room is a person in the air-conditioned room. After detecting the heat source for at least two minutes, the infrared sensor starts to sample the body surface temperature T of the heat source so as to overcome the error of the outdoor environment to the body surface temperature T. And a return air temperature sensor is arranged on a return air inlet of the air conditioner, and the ambient temperature of the air-conditioned room is sampled by the return air temperature sensor. Dressing index I of heat source in air conditioner roomcloMay be obtained by analysis of thermal images generated by infrared sensors. But more preferably, the dressing index I is sampledcloThe method is that the air conditioner and the server are communicated, and the server calls real-time recommended dressing information from a weather bureau database. The air conditioner stores dressing information and dressing index I in advancecloOne-to-one correspondence of (A), dressing index IcloIs a dimensionless constant.
The following selectable dressing information and dressing index IcloList relationships between.
Dressing information
|
Dressing index Iclo |
Short-sleeved shirt, trousers, shorts and shoes
|
0.5
|
Stocking, short-sleeved shirt and skirt
|
0.55
|
Shirt, trousers and socks
|
0.6
|
Shirt, dress, sock and shoe
|
0.7 |
Step S103, the body surface temperature and the ambient temperature T of the air conditioner are measured0And dressing index I of heat source in air-conditioned roomcloSubstituting the following formula, and calculating the heat dissipation X of the body surface; x = (h/(1 +0.18h I)clo))(T- T0) Wherein h = hr+hc, hrFor radiative heat conductivity, hcFor convective heat transfer, h is preferably 8.35W/m.
Step S104, the body surface temperature T and the environment temperature T of the air conditioner are measured0And dressing index I of heat source in air-conditioned roomcloSubstituting the following formula to calculate the dressing compensation coefficient Tr,Tr=( Iclo/(T- T0))- T0/ T。
In step S105, it is determined whether the body surface heat dissipation amount is larger than a set heat dissipation amount. The larger the heat dissipation of the human body, the colder the human feels, and the smaller the heat dissipation of the human body, the hotter the human feels. In summer, when the heat dissipation capacity of the human body is large, even if the indoor temperature is high and the body surface temperature of the human body is also high, the human body may be cold due to the indoor humidity and the health condition of the human body. Therefore, when the heat dissipation of the human body is high, the situation needs to be carefully treated, and therefore, a more accurate subjective human body temperature and cold feeling detection value is expected to be used as a reference for the next control. Through a large amount of experiments and theoretical guidance, a critical threshold value which is most easy to occur is obtained, and the critical threshold value is used as the set heat dissipation capacity.
In step S1061, if the body surface heat dissipation is greater than the set heat dissipation, the body surface heat dissipation X and the dressing compensation coefficient Tr are substituted into the following formula to calculate the subjective feeling of warmth and coldness Y:
Y=-k1X+Q1+Tr;
in step S1062, if the heat dissipation amount is less than or equal to the set heat dissipation amount, the body surface heat dissipation amount X and the dressing compensation coefficient Tr are substituted into the following formula to calculate the subjective feeling of warmth and coldness Y:
Y=-k2X+Q2+Tr。
wherein k is1< k2,Q1<Q2,Preferably, the heat dissipation capacity is set to be 30W/square meter and k1=0.09,k2,=0.2;Q1=1.5,Q2= 7.5. That is, when the heat dissipation capacity of the body surface is more than 30W/square meter, Y = -0.09X +1.5+ TrWhen the heat dissipation of the body surface is less than 30W/square meter, Y = -0.2X +7.5+ Tr。
When the body surface heat dissipation is higher than or lower than the set heat dissipation, the detection value of subjective temperature and coldness is corrected by using two groups of different correction formulas, so that accurate detection can be realized, particularly, the human body surface heat dissipation is large, the probability of misjudgment is reduced by the actual subjective temperature and coldness of the human body under the conditions of high ambient temperature and high body surface temperature, and an accurate data basis is provided for subsequent control.
Preferably, the subjective temperature-cold feeling grade is very cold when the subjective temperature-cold feeling Y belongs to (-4, -2.5), the subjective temperature-cold feeling grade is cold when the subjective temperature-cold feeling Y belongs to (-2.5, -1.5), the subjective temperature-cold feeling grade is comfortable when the subjective temperature-cold feeling Y belongs to (-1.5, 1.5), the subjective temperature-cold feeling grade is hot when the subjective temperature-cold feeling Y belongs to (1.5, 2.5), and the subjective temperature-cold feeling grade is very hot when the subjective temperature-cold feeling Y belongs to (2.5, 4).
Fig. 2 is a flow chart showing a specific preferred embodiment of the method for calculating the subjective feeling of temperature and cold to control the operation of the air conditioner according to the method disclosed in fig. 1.
In step S201, the subjective level of coolness is determined.
In step 202, if the subjective temperature and coldness level is not lower than the heat level, the person feels hot, and the following control strategy is executed.
Step S203, detecting a distance between the heat source and the air conditioner in real time. The distance detection is also obtained by an infrared sensor in combination with existing algorithms.
In order to make the user feel the temperature at every moment comfortably, and simultaneously play a role of cooling, the control method disclosed in this embodiment further includes the following steps:
and S204, determining the wind speed corresponding to the distance according to the corresponding relation between the distance and the wind speed, and taking the wind speed as the real-time wind speed. The phenomenon that the subjective temperature and cold feeling grade of a user jumps from a hot grade to a cold grade or below in a short time due to stimulation caused by a large amount of air outlet with too low temperature in the process of refrigerating operation is avoided. In a refrigeration environment, once an overshoot phenomenon from heat to cold occurs, it is difficult to automatically adjust to return to a comfortable state.
In the present embodiment, it is preferable to set three distance setting sections according to the area of the air-conditioned room, according to the common activity area of the person in the air-conditioned room.
Specifically, if the distance between the heat source, namely the user, and the air conditioner belongs to a first distance setting interval, determining a first set wind speed according to the relation between the distance and the wind speed, determining the first set wind speed as a real-time wind speed, and controlling the operation of the fan of the indoor unit of the air conditioner. And if the heat source, namely the distance between the user and the air conditioner belongs to a second distance setting interval, determining a second set wind speed according to the relation between the distance and the wind speed, determining the second set wind speed as a real-time wind speed, and controlling the operation of the fan of the indoor unit of the air conditioner. And if the heat source, namely the distance between the user and the air conditioner belongs to a third distance setting interval, determining a third set wind speed according to the relation between the distance and the wind speed, determining the third set wind speed as a real-time wind speed, and controlling the operation of the fan of the indoor unit of the air conditioner. Considering the relation between the air outlet temperature and the body surface temperature, the upper limit threshold values of the first distance interval, the second distance interval and the third distance interval are sequentially increased in an increasing manner, and the first set air speed, the second set air speed and the third set air speed are sequentially increased in an increasing manner. The area of a common air-conditioning room is less than or equal to 30 square meters, therefore, preferably, the first distance setting interval is set to (0, 1 m), the second distance setting interval is set to (1, 2 m), the third distance setting interval is set to (2, 3 m), the first set wind speed corresponds to a low wind gear or a breeze gear, the second set wind speed corresponds to a medium wind gear, and the third set wind speed corresponds to a high wind gear, so that a large amount of cold wind is prevented from being blown to the body surface of a user in a short distance.
Step S205, further considering the influence of the air-out temperature on the environment temperature and the human body surface temperature, considering the requirement of the refrigeration effect, detecting the air-return temperature of the air-conditioner air-return inlet and the air-out temperature of the air outlet in real time, and calculating the temperature difference between the air-return temperature and the air-out temperature as the real-time air-supply temperature difference.
And step S206, judging whether the real-time air supply temperature difference is larger than or equal to the temperature difference set value. The temperature difference set value is a temperature point obtained by a large number of air conditioner operation simulation experiments under the theoretical guidance of research personnel, and the ideal frequency corresponding to the temperature point is calculated at the same time. The return air temperature at the return air inlet of the air conditioner can be equal to the indoor ambient temperature. When the real-time air supply temperature difference is larger than or equal to the temperature difference set value, the indoor environment temperature is higher or the air supply temperature is lower.
As shown in steps S207 to S211, after the air conditioner is operated at the ideal frequency as the operation frequency, a sampling period is set. The sampling period begins and the compressor is run at the desired frequency. And generating a wind speed correction value or/and a frequency correction value according to the variation trend of the indoor temperature. And when the sampling period is finished, judging whether the subjective temperature and cold feeling grade is a 'comfortable' grade or not.
If the determination result is still at the "hot" or "very hot" level, the sampling period is started again, and the compressor controls the operation of the compressor and the indoor fan by the sum of the real-time wind speed and the wind speed correction value generated at the previous sampling period and/or the sum of the operation frequency and the frequency correction value, as shown in steps S212 and S214. If it is the "comfort" level, the above control process is exited as by step S213, and the compressor is operated at a low frequency.
As shown in steps S215 to 217, in the sampling period, the corresponding wind speed correction value and/or frequency correction value is also generated according to the distance. And executing a circulating program until the sampling period is finished, judging that the result is a 'comfortable' grade, exiting the control process, and operating the compressor according to the low frequency.
With the control method disclosed in the above embodiment, when the subjective level of the sensation of warmth and coldness of the user in the air-conditioned room is "hot" or "very hot", firstly, the wind speed is limited in a reasonable interval according to the distance between a user and the air conditioner, thereby avoiding that a large amount of cold wind is blown to the user, the temperature and cold feeling of the user is changed from a 'hot' grade to a 'cold' grade to cause overshoot, secondly, when the ambient temperature in the air conditioning room is higher or the outlet air temperature is lower, the running frequency of the compressor is adjusted to the ideal frequency, and in a sampling period or a plurality of continuous sampling periods, the wind speed or the compressor frequency is corrected and suppressed in advance during the control, so that during the temperature drop in the air-conditioned room, the subjective temperature and coldness feeling of the user can change in a gradually stable trend and keep at a 'comfortable' level, so that the user feels comfortable every moment.
When the user is far from the air conditioner, the possibility of an overshoot condition is generally low. When the air conditioner is close to the air conditioner, the possibility of occurrence of overshoot is high. Furthermore, a temperature difference set value corresponding to the distance between the user and the air conditioner is preferably generated according to the distance between the user and the air conditioner, and when the distance and the real-time air supply temperature difference both meet the conditions, a more accurate control strategy is executed.
Specifically, as shown in steps S301 to S304 in fig. 3, if the distance belongs to the first distance setting interval, it is determined whether the real-time air supply temperature difference is greater than or equal to the first temperature difference setting value. And if the real-time air supply temperature difference is larger than or equal to the first temperature difference set value, generating a corresponding frequency correction value in each sampling period, and starting to control the compressor to operate by the sum of the operation frequency and the frequency correction value in the next sampling period.
As shown in steps S401 to S404 in fig. 4, if the distance belongs to a second distance setting interval, it is determined whether the real-time air supply temperature difference is greater than or equal to a second temperature difference setting value, and if the real-time air supply temperature difference is greater than or equal to the second temperature difference setting value, a corresponding air speed correction value is generated in each sampling period, and the indoor fan is controlled to operate by the sum of the second set air speed and the air speed correction value in the next sampling period.
As shown in steps S501 to S504 in fig. 5, if the distance belongs to the third distance setting interval, it is determined whether the real-time air supply temperature difference is greater than or equal to the third temperature difference setting value. And if the real-time air supply temperature difference is larger than or equal to a third temperature difference set value, generating a corresponding frequency correction value and an air speed correction value in each sampling period, starting to control the compressor to operate by the sum of the operating frequency and the frequency correction value in the next sampling period, and controlling the indoor fan to operate by the sum of the third set air speed and the air speed correction value.
Wherein, the first temperature difference set value, the second temperature difference set value and the third temperature difference set value are sequentially increased. At relatively large distances, wind speed and frequency are allowed to adjust to a wide range.
The wind speed correction value in each sampling period is preferably generated by generating the sampling period while simultaneously generating the code ordinal number of the sampling period, and the wind speed correction value in each sampling period is a product of the wind speed correction factor and the code ordinal number of the corresponding sampling period. Preferably, the wind speed correction value is negative.
The frequency correction value in each sampling period is preferably generated by generating the coding ordinal number of the sampling period at the same time as the sampling period, and the frequency correction value in each sampling period is a product of the frequency correction factor and the coding ordinal number of the corresponding sampling period. Preferably, the frequency correction value is negative.
The sampling period is preferably in seconds.
According to the air conditioner control method based on the temperature and the cold feeling disclosed by the embodiment, when a person feels hot in the refrigeration mode, the frequency and the wind speed of the compressor are accurately adjusted according to the distance between the heat source and the air conditioner, and the phenomenon of overshoot is avoided.
The invention also discloses an air conditioner, which adopts the air conditioner control method based on the temperature and the cold feeling as disclosed in any one of the embodiments. The detailed description of the air conditioner control method refers to any one of the above embodiments and the detailed description of the drawings in the specification, and is not repeated herein. The air conditioner adopting the air conditioner control method can achieve the same technical effect.
It should be noted that any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and that the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having appropriate combinational logic gates, Programmable Gate Arrays (PGAs), Field Programmable Gate Arrays (FPGAs), and the like, may be implemented using any one or combination of techniques known in the art.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In the description herein, references to the description of "some embodiments" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.