CN113669875B - Temperature control method of micro air conditioner - Google Patents
Temperature control method of micro air conditioner Download PDFInfo
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- CN113669875B CN113669875B CN202010404330.2A CN202010404330A CN113669875B CN 113669875 B CN113669875 B CN 113669875B CN 202010404330 A CN202010404330 A CN 202010404330A CN 113669875 B CN113669875 B CN 113669875B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0042—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater characterised by the application of thermo-electric units or the Peltier effect
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides a temperature control method of a micro air conditioner, which comprises the following steps: calibrating the control current of the micro air conditioner flowing through the semiconductor Peltier device and the measured temperatures of the two temperature sensors under different environmental temperatures and target temperature conditions; initializing the micro air conditioner, and obtaining an initial environment temperature by adopting two temperature sensors; comparing the initial environment temperature with the target temperature, determining to work in a refrigeration mode or a heating mode, and turning on or off the cooling fan; and obtaining the control current and the reference temperature based on a table look-up method, comparing the measured temperatures of the two temperature sensors with the reference temperature, and iteratively increasing or decreasing the control current. The invention can overcome the influence of obvious temperature gradient in the limited space of the micro air conditioner on the performance of the temperature sensor, and realize the temperature control of the micro air conditioner with the characteristics of light weight, portability and wearability.
Description
Technical Field
The invention relates to the technical field of temperature control methods, in particular to a temperature control method of a micro air conditioner.
Background
The thermoelectric material or the thermoelectric device may control heat flow using current based on the peltier effect, so the micro air conditioner based on the thermoelectric material or the thermoelectric device may realize temperature control. Compared with the traditional large air conditioner widely applied to public places and home scenes at present, the miniature air conditioner has the characteristics of being light, thin, small, portable and wearable, and further can conveniently realize low power consumption, individuation and portable local temperature control.
The micro air conditioner mainly comprises main modules such as a semiconductor Peltier device, a cooling fan, a control circuit, a temperature sensor, a rechargeable battery and the like, wherein the temperature is changed by adjusting the size and the direction of control current flowing through the semiconductor Peltier device through the control circuit. In order to realize stable and reliable temperature control, the micro air conditioner also needs to utilize a temperature sensor to measure temperature and feed back, but the characteristics of light, thin and small size of the micro air conditioner bring technical difficulties for accurate temperature measurement of the temperature sensor and even temperature control of the whole system: the excessively small space size can cause obvious temperature gradient distribution in the interior of the micro air conditioner during working, so that on one hand, reference temperature compensation of the thermocouple temperature sensor is restricted, and temperature measurement is unstable, and on the other hand, the temperature sensitivity of the integrated circuit chip temperature sensor is reduced, and temperature measurement is inaccurate during refrigeration application.
In conclusion, the micro air conditioner has application advantages in scenes such as personalized setting, wearable and networking use, but the main technical difficulty at present is accurate and reliable temperature control.
Disclosure of Invention
In view of the above-mentioned technical problems, a temperature control method for a micro air conditioner is provided. The invention mainly utilizes a temperature control method of a micro air conditioner, which is characterized by comprising the following steps:
step S1: acquiring the measured temperature T of the upper temperature sensor after the micro air conditioner starts temperature control up And the measured temperature T of the lower temperature sensor down Taking the average temperature of the two temperature sensors as the initial environment temperature T after stable work environ I.e. T environ ＝0.5*(T up +T down )；
Step S2: setting a target temperature T target ；
And step S3: judging the initial environment temperature T environ Whether it is higher than the target temperature T target (ii) a When the initial ambient temperature T environ Less than or equal to the target temperature T target If yes, executing step S13; when the initial ambient temperature T environ Greater than said target temperature T target If yes, executing step S4;
and step S4: working in a refrigeration mode, and controlling the current to be a forward current; by micro-controlThe controller records the measured temperature T of the upper temperature sensor up And starting the heat radiation fan;
step S5: the microcontroller is based on the initial ambient temperature T environ And the target temperature T target Inquiring the system calibration table to obtain the initial reference temperature T = T up (m, n) and initial control current I = I control (m, n) and recording the number n of the initial columns;
step S6: the upper temperature sensor reacquires the measured temperature T up ’；
Step S7: judging the measured temperature T up ' is greater than the initial reference temperature T; when the measured temperature T is up ' when it is greater than the initial reference temperature T, step S8 is performed; when the measured temperature T is up When' is less than or equal to the initial reference temperature T, step S11 is performed;
step S8: the microcontroller updates the control current and the reference temperature according to the system calibration table, namely, the microcontroller performs table look-up by shifting the column number n by the step number s to the right relative to the column number n to obtain a new control current I = I control (m, n + s) and a reference temperature T = T up (m, n + s) and the number of columns where the updated records are located is n = n + s;
step S9: the microcontroller judges whether the user artificially updates the target temperature T or not through a wireless communication chip target (ii) a When the target temperature T is updated target If yes, executing step S10; when the target temperature T is not updated target If yes, executing step S12;
step S10: the microcontroller judges whether the user artificially selects to finish temperature control through the wireless communication chip; when the ending of the temperature control is selected, the microcontroller cancels the temperature control; when the ending of the temperature control is not selected, the microcontroller re-executes the step S2;
step S11: the microcontroller updates the control current and the reference temperature according to the system calibration table, namely, the column number n is shifted to the left by the step length s to form a table, and a new control current I = I is obtained control (m, n-s) and a reference temperature T = T up (m,n-s), and the number of columns where the updated records are located is n = n-s;
step S12: after waiting time t, the microcontroller executes step S6; the waiting time t is used for stabilizing the measured temperature at the upper temperature sensor after the control current is updated;
step S13: when the device works in a heating mode, the control current is reverse current; recording the measured temperature T of the lower temperature sensor by the microcontroller down And closing the heat dissipation fan;
step S14: the microcontroller is based on the initial ambient temperature T environ And the target temperature T target Inquiring the system calibration table to obtain the initial reference temperature T = T down (m, n) and initial control current I = I control (m, n) and recording the number n of the initial columns;
step S15: the lower temperature sensor reacquires the measured temperature T down ’；
Step S16: judging the measured temperature T down ' is greater than the initial reference temperature T; when the measured temperature T is down ' when it is greater than the initial reference temperature T, step S17 is performed; when the measured temperature T is down ' when equal to or less than the initial reference temperature T, step S19 is performed;
step S17: the microcontroller updates the control current and the reference temperature according to the system calibration table, namely, the column number n is shifted to the right by the step number s relative to the column number n to obtain a new control current I = I control (m, n + s) and reference temperature T = T down (m, n + s) and the number of columns where the updated records are located is n = n + s;
step S18: the microcontroller judges whether the user artificially updates the target temperature T or not through a wireless communication chip target (ii) a When the target temperature T is updated target If yes, executing step S10; when the target temperature T is not updated target If yes, executing step S20;
step S19: the microcontroller updates the control current and the reference temperature according to the system calibration table, i.e. steps left relative to the column number nLooking up the table by the long column number s to obtain the new control current I = I control (m, n-s) and a reference temperature T = T down (m, n-s) and the number of columns where the updated records are located is n = n-s;
step S20: after waiting time t, the microcontroller executes step S15; the waiting time t is used for stabilizing the measured temperature at the lower temperature sensor after the control current is updated.
Further, the temperature control method of the micro air conditioner further comprises the step S0, namely measuring and obtaining the system calibration table under the condition of finishing temperature control; under different environmental temperatures, the micro air conditioner reaches different working end temperatures by increasing or decreasing the control current through the microcontroller, and the microcontroller records the control current, the measured temperature of the upper temperature sensor and the measured temperature of the lower temperature sensor under different environmental temperature and working end temperature combination conditions so as to obtain the system calibration table.
Furthermore, the environmental temperature of the system calibration table is in the same temperature range as the temperature of the working end, and the temperature range is between 0 ℃ and 60 ℃; the temperature interval between the environment temperature of the system calibration meter and the temperature of the working end is the same, and the temperature interval is not less than 1 ℃.
Furthermore, the rows of the system calibration table correspond to the working end temperature of the micro air conditioner, and the larger the row number is, the higher the corresponding working end temperature is; the columns of the system calibration table correspond to the ambient temperature of the micro air conditioner, and the larger the number of the columns is, the higher the ambient temperature is.
Further, the waiting time t is not less than 2 seconds, and the step column number s is not less than 1 column; and specifically optimizing the specific time t and the step length column number s according to a neural network algorithm.
Compared with the prior art, the invention has the following advantages:
the invention can overcome the influence of obvious temperature gradient in the limited space of the intelligent micro air conditioner on the performance of the temperature sensor, and realize the temperature control of the intelligent micro air conditioner with the characteristics of light weight, portability and wearability.
The temperature control of the micro air conditioner needs to adopt a small temperature sensor for temperature feedback. However, the small space and the large temperature gradient lead to inaccurate temperature measurement by using a single temperature sensor (the temperature can be measured accurately when the temperature is higher than the ambient temperature, but the sensitivity is reduced when the temperature is lower than the ambient temperature, which leads to inaccurate temperature measurement). Therefore, this patent proposes measuring temperature using two temperature sensors, an upper one and a lower one. Whether in a cooling mode or a heating mode, one of the upper temperature sensor and the lower temperature sensor must measure a temperature higher than the ambient temperature (namely, the temperature measurement is accurate), so that the hotter or higher measured temperature is compared with a system calibration table to realize accurate temperature control.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of the temperature control of the present invention;
FIG. 2 is a schematic diagram of an intelligent micro air conditioner in one embodiment of the present invention;
FIG. 3 is a block diagram of the temperature control of the present invention;
FIG. 4 is a table illustrating control current and temperature calibration according to an embodiment of the present invention.
In the figure: 10. an intelligent micro air conditioner; 110. installing a bottom shell; 111. a cooling/heating switching structure mounting hole; 120. a heat-dissipating top case; 121. a heat dissipation air hole array; 211. a cooling/heating switching structure; 212. a semiconductor peltier device; 213. an array of heat sinks; 214. a heat radiation fan; 221. a lower temperature sensor; 222. an upper temperature sensor; 231. a rechargeable battery; 240. a control circuit; 241. a microcontroller; 242. a wireless communication chip.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, the present invention provides a temperature control method of a micro air conditioner, comprising the steps of:
step S1: acquiring the measured temperature T of the upper temperature sensor after the micro air conditioner starts temperature control up And the measured temperature T of the lower temperature sensor down Taking the average temperature of the two temperature sensors as the initial environment temperature T after stable operation environ I.e. T environ ＝0.5*(T up +T down )。
Step S2: setting a target temperature T target 。
And step S3: judging the initial environment temperature T environ Whether it is higher than the target temperature T target (ii) a When the initial ambient temperature T environ Not more than the target temperature T target Then, the step is executedS13; when the initial ambient temperature T environ Greater than the target temperature T target Then, step S4 is executed.
And step S4: working in a refrigeration mode, and controlling the current to be a forward current; recording the measured temperature T of the upper temperature sensor by means of a microcontroller up And a heat dissipation fan is started.
Step S5: the microcontroller is based on the initial ambient temperature T environ And the target temperature T target Inquiring the system calibration table to obtain the initial reference temperature T = T up (m, n) and initial control current I = I control (m, n) and recording the number n of the initial columns; in the application, the rows of the system calibration table correspond to the specific temperature or the specific target temperature of the working end, and the larger the row number is, the higher the corresponding specific temperature is; the columns of the system calibration table correspond to specific ambient temperatures, and the specific temperatures are higher when the number of the columns is larger.
Step S6: the upper temperature sensor reacquires the measured temperature T up ’。
Step S7: judging the measured temperature T up ' is greater than the initial reference temperature T; when the measured temperature T is up ' greater than the initial reference temperature T, step S8 is performed; when the measured temperature T is up ' less than or equal to the initial reference temperature T, step S11 is performed.
Step S8: the microcontroller updates the control current and the reference temperature according to the system calibration table, namely, the column number n is shifted to the right by the step number s relative to the column number n to obtain a new control current I = I control (m, n + s) and a reference temperature T = T up (m, n + s), and the number of columns in which the updated records are located is n = n + s.
Step S9: the microcontroller judges whether the user artificially updates the target temperature T or not through a wireless communication chip target (ii) a When the target temperature T is updated target If yes, executing step S10; when the target temperature T is not updated target Then, step S12 is executed. In the application, the wireless communication chip monitors whether the upper computer (such as a mobile phone App) updates data. If it is onAnd the data of the computer is updated, and the wireless communication chip receives the trigger signal and then rewrites the numerical value. Meanwhile, it should be understood that in other embodiments, the upper computer may also be a computer or other mobile terminals.
Step S10: the microcontroller monitors whether the user selects to finish temperature control on the upper computer through the wireless communication chip; when the ending of the temperature control is selected, the microcontroller cancels the temperature control; when the ending of the temperature control is not selected, the microcontroller re-executes step S2. Here, the temperature control mode is manually selected, and it is understood in the art that the temperature control mode can be set and selected according to actual conditions.
Step S11: the microcontroller updates the control current and the reference temperature according to the system calibration table, namely, the microcontroller performs table look-up by shifting the column number n by the step number s to the left to obtain a new control current I = I control (m, n-s) and a reference temperature T = T up (m, n-s) and the number of columns in which the update record is located is n = n-s.
Step S12: after waiting time t, the microcontroller executes step S6; the waiting time t is used for stabilizing the measured temperature at the upper temperature sensor after the control current is updated. The waiting time T is T caused by updating the control current after the step S8 or S11 up And tends to be stable. Because if there is no waiting or the waiting time is too short, T will be caused up The microcontroller frequently and rapidly updates the control current by adopting a table look-up method without entering a stable state, thereby destroying the accuracy of temperature control, increasing the power consumption of the system and shortening the endurance time.
Step S13: when the device works in a heating mode, the control current is reverse current; recording the measured temperature T of the lower temperature sensor by the microcontroller down And closing the heat dissipation fan;
step S14: the microcontroller is based on the initial ambient temperature T environ And the target temperature T target Inquiring the system calibration table to obtain the initial reference temperature T = T down (m, n) and initial control current I = I control (m, n) and recording the number n of the initial columns;
step S15: the lower temperature sensor reacquires the measured temperature T down ’；
Step S16: judging the measured temperature T down ' is greater than the initial reference temperature T; when the measured temperature T is down ' when it is greater than the initial reference temperature T, step S17 is performed; when the measured temperature T is down ' when equal to or less than the initial reference temperature T, step S19 is performed;
step S17: the microcontroller updates the control current and the reference temperature according to the system calibration table, namely, the column number n is shifted to the right by the step number s relative to the column number n to obtain a new control current I = I control (m, n + s) and reference temperature T = T down (m, n + s) and the number of columns where the updated records are located is n = n + s;
step S18: the microcontroller judges whether the user artificially updates the target temperature T or not through a wireless communication chip target (ii) a When the target temperature T is updated target If yes, executing step S10; when the target temperature T is not updated target If yes, executing step S20;
step S19: the microcontroller updates the control current and the reference temperature according to the system calibration table, namely, the microcontroller performs table look-up by shifting the column number n by the step number s to the left to obtain a new control current I = I control (m, n-s) and a reference temperature T = T down (m, n-s) and the number of columns in which the updated records are located is n = n-s. The waiting time t is not less than 2 seconds, and the step length column number s is not less than 1 column; and specifically optimizing the specific time t and the step length column number s according to a neural network algorithm. The specific optimization procedures described herein are conventional and well-established in the art, and therefore will not be described in detail herein.
Step S20: after waiting time t, the microcontroller executes step S15; the waiting time t is used for stabilizing the measured temperature at the lower temperature sensor after the control current is updated.
As a preferred embodiment of the present application, the method for controlling the temperature of the micro air conditioner further comprises a step S0 of measuring and obtaining the system calibration table under the condition of ending the temperature control; under different environment temperatures, the micro air conditioner reaches different working end temperatures by increasing or decreasing the control current through the microcontroller, and the microcontroller records the control current, the measured temperature of the upper temperature sensor and the measured temperature of the lower temperature sensor under different environment temperatures and working end temperature combination conditions so as to obtain the system calibration table;
the temperature range of the environment temperature of the system calibration table is the same as the temperature range of the working end temperature, and the temperature range is between 0 ℃ and 60 ℃; the temperature interval between the environment temperature of the system calibration meter and the temperature of the working end is the same, and the temperature interval is not less than 1 ℃.
Also as a preferred embodiment of the present application, in the present application, an apparatus/system adopting the above method, wherein the microcontroller is electrically connected to the wireless communication chip for obtaining and updating the target temperature T target And start or end temperature control; the microcontroller is electrically connected with the heat dissipation fan and used for starting or closing the heat dissipation fan in a cooling mode or a heating mode; the micro-controller is electrically connected with a semiconductor Peltier device of the micro-air conditioner, and the temperature of the working end of the micro-air conditioner is changed by changing the magnitude or the direction of control current flowing through the semiconductor Peltier device.
Meanwhile, the upper temperature sensor is in contact with the cooling fan and is used for measuring the temperature of the cooling fan; the lower temperature sensor is contacted with the working end of the micro air conditioner and is used for measuring the temperature of the working end; the microcontroller is electrically connected with the upper temperature sensor and the lower temperature sensor; the microcontroller acquires the temperature T of the upper temperature sensor under the condition of starting temperature control up ' and temperature T of the lower temperature sensor down ', using T up ' and T down ' the hotter temperature and the system calibration table realize the temperature control of the micro air conditioner.
Example 1
As shown in fig. 2, the intelligent micro air conditioner 10 according to the embodiment mainly includes a mounting bottom case 110, a mounting top case 120, a semiconductor peltier device 212, a heat radiating fan 214, a lower temperature sensor 221, an upper temperature sensor 222, a rechargeable battery 231, and a control circuit 240. The mounting top shell 120 is provided with a heat dissipation air hole array 121, and can be matched with a heat dissipation fan 214 to dissipate heat of the intelligent micro air conditioner 10; the mounting bottom case 110 has a cooling/heating structure mounting hole 111 for placing a cooling/heating transfer structure 211; the refrigeration/heating switching structure 211 is made of an aluminum alloy material, the lower end surface of the refrigeration/heating switching structure is in contact with a target object and is used for controlling the temperature of the target object, and the upper end surface of the refrigeration/heating switching structure is in contact with the semiconductor Peltier device 212; the rechargeable battery 231 is used to supply power to the intelligent micro air conditioner 10; the control circuit 240 includes a microcontroller 241 and a wireless communication chip 242.
As shown in fig. 3, the lower temperature sensor 221 is in direct contact with the upper end surface of the cooling/heating changeover structure 211 and in indirect contact with the lower end surface of the semiconductor peltier device 212; the heat dissipation fan 214 is in indirect contact with the upper end face of the semiconductor peltier device 212 via the heat sink array 213; the upper temperature sensor 222 is in direct contact with the side of the heat sink array 213 and in indirect contact with the heat dissipation fan 214. The lower temperature sensor 221 and the upper temperature sensor 222 are small-sized temperature sensors of the DS18S20 type.
According to step S0) for a specific ambient temperature T environ And a specific target temperature T target And (3) calibrating the control current and the temperature parameters measured by the temperature sensors point by point under the condition to obtain a system calibration table of the intelligent micro air conditioner 10. Wherein, T environ And T target The temperature ranges from 20 ℃ to 50 ℃ and the temperature intervals Δ T are 2 ℃. As shown in FIG. 4, in the system calibration table, the upper right region corresponds to the target temperature T target Less than ambient temperature T environ The cooling mode, the area in which the cooling fan is started during calibration, and the reference temperature recorded as the measured temperature T of the upper temperature sensor 222 up The recorded control current is positive and at the same target temperature T target The absolute value of the control current on the right side is larger than that on the left side under the conditionControlling the absolute value of the current; lower left region corresponds to target temperature T target Greater than or equal to ambient temperature T environ The heating mode, the area in which the cooling fan is turned off during calibration, and the reference temperature recorded as the measured temperature T of the lower temperature sensor 221 down The recorded control current is negative and at the same target temperature T target The absolute value of the control current on the right side is smaller than the absolute value of the control current on the left side under the condition.
Further, after obtaining the system calibration table of the intelligent micro air conditioner 10, the temperature of the intelligent micro air conditioner 10 may be controlled based on a table look-up method using the lower temperature sensor 221 and the upper temperature sensor 222 according to steps S1) to S20). Wherein, in steps S8), S11), S17) and S19), the number S of specific time step lines is 2 lines; in steps S12) and S20), the waiting time t is 5 seconds; in steps S9) and S18), the updated target temperature T target The application program of the mobile terminal such as a personal computer or a smart phone is modified, and the modified application program is received by the wireless communication chip 242 and transferred to the microcontroller 241.
The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other manners. The above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or may not be executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be an indirect coupling or communication connection through some interfaces, units or modules, and may be electrical or in other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. A temperature control method of a micro air conditioner is characterized by comprising the following steps:
s1: after the micro air conditioner starts temperature control, acquiring the measured temperature T of the upper temperature sensor up And the measured temperature T of the lower temperature sensor down Taking the average temperature of the two temperature sensors as the initial environment temperature T after stable work environ I.e. T environ ＝0.5*(T up +T down )；
S2: setting a target temperature T target ；
S3: judging the initial environment temperature T environ Whether it is higher than the target temperature T target (ii) a When the initial ambient temperature T environ Less than or equal to the target temperature T target If yes, executing step S13; when the initial ambient temperature T environ Greater than the target temperature T target If yes, executing step S4;
s4: working in a refrigeration mode, and controlling the current to be a forward current; recording the measured temperature T of the upper temperature sensor by means of a microcontroller up And starting up the heat radiation fan;
s5: the micro-controlThe system is based on the initial ambient temperature T environ And the target temperature T target Inquiring a system calibration table to obtain an initial reference temperature T = T up (m, n) and initial control current I = I control (m, n), and recording the initial row number m and the initial column number n;
s6: the upper temperature sensor reacquires the measured temperature T up ’；
S7: judging the measured temperature T up ' is greater than the initial reference temperature T; when the measured temperature T is up ' greater than the initial reference temperature T, step S8 is performed; when the measured temperature T is up When' is less than or equal to the initial reference temperature T, step S11 is performed;
s8: the microcontroller updates the control current and the reference temperature according to the system calibration table, namely, the microcontroller performs table look-up by shifting the column number n by the step number s to the right relative to the column number n to obtain a new control current I = I control (m, n + s) and a reference temperature T = T up (m, n + s) and the number of columns where the updated records are located is n = n + s;
s9: the microcontroller judges whether the user artificially updates the target temperature T or not through a wireless communication chip target (ii) a When the target temperature T is updated target If yes, executing step S10; when the target temperature T is not updated target If so, executing step S12;
s10: the microcontroller judges whether the user artificially selects to finish temperature control or not through the wireless communication chip; when the ending of the temperature control is selected, the microcontroller cancels the temperature control; when the ending of the temperature control is not selected, the microcontroller re-executes the step S2;
s11: the microcontroller updates the control current and the reference temperature according to the system calibration table, namely, the column number n is shifted to the left by the step length s to form a table, and a new control current I = I is obtained control (m, n-s) and a reference temperature T = T up (m, n-s), and the number of columns where the updated records are located is n = n-s;
s12: after waiting time t, the microcontroller executes step S6; the waiting time t is used for stabilizing the measured temperature at the upper temperature sensor after the control current is updated;
s13: working in a heating mode, and controlling the current to be reverse current; recording the measured temperature T of the lower temperature sensor by the microcontroller down And closing the heat dissipation fan;
s14: the microcontroller is used for controlling the temperature of the environment according to the initial environment temperature T environ And the target temperature T target Inquiring the system calibration table to obtain the initial reference temperature T = T down (m, n) and initial control current I = I control (m, n), and recording the initial row number m and the initial column number n;
s15: the lower temperature sensor reacquires the measured temperature T down ’；
S16: judging the measured temperature T down ' is greater than the initial reference temperature T; when the measured temperature T is down ' when it is greater than the initial reference temperature T, step S17 is performed; when the measured temperature T is down When' is less than or equal to the initial reference temperature T, step S19 is performed;
s17: the microcontroller updates the control current and the reference temperature according to the system calibration table, namely, the microcontroller performs table look-up by shifting the column number n by the step number s to the right relative to the column number n to obtain a new control current I = I control (m, n + s) and a reference temperature T = T down (m, n + s) and the number of columns where the updated records are located is n = n + s;
s18: the microcontroller detects whether the terminal program updates the target temperature T by using a wireless communication chip target (ii) a When the target temperature T is updated target If yes, executing step S10; when the target temperature T is not updated target If yes, executing step S20;
s19: the microcontroller updates the control current and the reference temperature according to the system calibration table, namely, the microcontroller performs table look-up by shifting the column number n by the step number s to the left to obtain a new control current I = I control (m, n-s) and a reference temperature T = T down (m, n-s), and the number of columns where the updated records are located is n = n-s;
s20: after waiting time t, the microcontroller executes step S15; the waiting time t is used for stabilizing the measured temperature at the lower temperature sensor after the control current is updated;
according to the specific ambient temperature T environ And a specific target temperature T target Under the condition, the control current and the temperature parameters measured by the temperature sensors are calibrated point by point to obtain a system calibration table of the intelligent micro air conditioner 10; wherein, T environ And T target The temperature ranges from 20 ℃ to 50 ℃ and the temperature interval Delta T is 2 ℃; in the system calibration table, the upper right region corresponds to the target temperature T target Less than ambient temperature T environ The area is calibrated by starting the cooling fan, and the recorded reference temperature is the measured temperature T of the upper temperature sensor up The recorded control current is positive and at the same target temperature T target The absolute value of the control current on the right side is larger than that on the left side under the condition; lower left region corresponds to target temperature T target Greater than or equal to ambient temperature T environ In the heating mode, the area is calibrated to turn off the heat-dissipating fan, and the reference temperature is recorded as the measured temperature T of the lower temperature sensor down The recorded control current is negative and at the same target temperature T target The absolute value of the control current on the right side is smaller than the absolute value of the control current on the left side under the condition.
2. The temperature control method of a micro-air conditioner according to claim 1, wherein:
the rows of the system calibration table correspond to the target temperature of the working end of the micro air conditioner, and the larger the row number is, the higher the target temperature of the corresponding working end is; the columns of the system calibration table correspond to the ambient temperature of the micro air conditioner, and the larger the number of the columns is, the higher the ambient temperature is.
3. The temperature control method of a micro-air conditioner according to claim 1, wherein:
the waiting time t is not less than 2 seconds, and the step length column number s is not less than 1 column; and optimizing the waiting time t and the step length column number s according to a neural network algorithm.
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