CN113830115A - Control method and device for variable-frequency subway air conditioning unit and readable storage medium - Google Patents
Control method and device for variable-frequency subway air conditioning unit and readable storage medium Download PDFInfo
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- CN113830115A CN113830115A CN202010989106.4A CN202010989106A CN113830115A CN 113830115 A CN113830115 A CN 113830115A CN 202010989106 A CN202010989106 A CN 202010989106A CN 113830115 A CN113830115 A CN 113830115A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D27/00—Heating, cooling, ventilating, or air-conditioning
- B61D27/0018—Air-conditioning means, i.e. combining at least two of the following ways of treating or supplying air, namely heating, cooling or ventilating
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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Abstract
The application relates to a control method and a device for a variable-frequency subway air conditioning unit and a readable storage medium, wherein the control method for the variable-frequency subway air conditioning unit comprises the following steps: acquiring the outdoor temperature outside the subway at preset time intervals; obtaining a change value of the outdoor temperature according to the current outdoor temperature and the outdoor temperature at the previous time point; if the change value is larger than a deviation starting threshold value, inputting the change value into a temperature control model to obtain a frequency adjustment value; and adjusting the frequency of the compressor of the air conditioning unit to a frequency adjustment value. Through the application, the frequency of the frequency conversion compressor is actively preset to adapt to the change of the load in the vehicle caused by the change of the outdoor temperature, the problem that the outdoor temperature fluctuates violently when the tunnel enters and exits is solved, and the indoor temperature is kept at a comfortable temperature.
Description
Technical Field
The application relates to the technical field of train variable frequency air conditioners, in particular to a control method and device for a variable frequency subway air conditioner unit and a readable storage medium.
Background
The train inverter air conditioner of each compartment generally comprises a plurality of air conditioning units, each air conditioning unit generally comprises at least one air conditioning system, and each air conditioning system comprises at least one compressor, so that the train inverter air conditioner of each compartment generally comprises a plurality of compressors. For inverter air conditioning units, the higher the operating frequency of the compressor, the higher the refrigeration/heat generated by the corresponding air conditioning system. The operating frequency of the compressor is determined based on a rated frequency for achieving a rated cooling/heating amount and a temperature difference coefficient determined by a difference between an actual temperature in the vehicle compartment and a target temperature.
At present, the subway line with part of elevated stations often has severe fluctuation of external temperature due to the influence of entering and exiting tunnels, thereby causing the temperature fluctuation in the vehicle.
At present, no effective solution is provided aiming at the problem that the temperature in the vehicle fluctuates due to the fact that the external temperature fluctuates violently when the vehicle enters or exits the tunnel in the related technology.
Disclosure of Invention
The embodiment of the application provides a control method and device of a variable-frequency subway air conditioning unit and a readable storage medium, which are used for at least solving the problem that the temperature in a vehicle fluctuates due to severe fluctuation of the external temperature when the vehicle enters or exits a tunnel in the related art.
In a first aspect, an embodiment of the present application provides a method for controlling an inverter subway air conditioning unit, including:
acquiring the outdoor temperature outside the subway at preset time intervals;
obtaining a change value of the outdoor temperature according to the current outdoor temperature and the outdoor temperature at the previous time point;
if the change value is larger than a deviation starting threshold value, inputting the change value into a temperature control model to obtain a frequency adjustment value;
and adjusting the frequency of the compressor of the air conditioning unit to a frequency adjustment value.
In some embodiments, subway structure parameters and minimum adjustable refrigeration capacity are obtained;
obtaining a deviation starting threshold value according to the subway structure parameters and the minimum adjustable refrigerating capacity;
and if the change value is larger than the deviation starting threshold value, inputting the change value into a temperature control model to obtain a frequency adjustment value.
In some embodiments, the subway structure parameters include: the solar radiation, the solar heat gain coefficient, the heat transfer coefficient of the vehicle body enclosure structure and the heat transfer area received by the transparent enclosure structure.
In some embodiments, historical operation data of the subway air conditioning unit in a preset time period is obtained;
according to the historical operation data, acquiring a corresponding frequency calculation coefficient of outdoor temperature, an in-vehicle temperature correction coefficient and an outdoor temperature correction coefficient;
and generating a temperature control model according to the outdoor temperature corresponding frequency calculation coefficient, the in-vehicle temperature correction coefficient and the outdoor temperature correction coefficient.
In some embodiments, according to the historical operation data, solar radiation, solar heat gain coefficient, heat transfer coefficient of the vehicle body enclosure structure and heat transfer area received by the transparent enclosure structure are obtained;
and obtaining a corresponding frequency calculation coefficient of the outdoor temperature according to the solar radiation received by the transparent enclosure structure, the solar heat gain coefficient, the heat transfer coefficient of the vehicle body enclosure structure and the heat transfer area.
In some of these embodiments, the temperature control model is Δ F2＝A*(Ten-Ten-1)*BTk*CT0。
In some embodiments, a subway indoor sensor temperature value and a return air temperature correction value are obtained;
and obtaining an actual indoor temperature value according to the indoor sensor temperature value and the return air temperature correction value.
In a second aspect, an embodiment of the present application provides a control device for a variable-frequency subway air conditioning unit, which is characterized by comprising:
the temperature acquisition module is used for acquiring the outdoor temperature outside the subway;
the change value acquisition module is used for acquiring the change value of the outdoor temperature according to the outdoor temperature;
the frequency calculation module is used for inputting the change value into the temperature control model to obtain a frequency adjustment value if the change value is greater than a deviation starting threshold value;
and the frequency adjusting module is used for adjusting the frequency of the compressor of the air conditioning unit according to the frequency adjusting value.
In a third aspect, an embodiment of the present application provides a computer device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor, when executing the computer program, implements the method for controlling an inverter subway air conditioning unit as described in the first aspect.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements the inverter subway air conditioning unit control method as described in the first aspect above.
Compared with the prior art, the control method of the variable-frequency subway air conditioning unit, provided by the embodiment of the application, adapts to the change of the load in the subway caused by the change of the outdoor temperature by actively pre-adjusting the frequency of the variable-frequency compressor, solves the problem that the outdoor temperature fluctuates violently when the variable-frequency compressor enters and exits the tunnel, and realizes that the indoor temperature is kept at a comfortable temperature.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a flowchart of a control method of an inverter subway air conditioning unit according to an embodiment of the present application;
FIG. 2 is a flowchart of a control method of an inverter subway air conditioning unit according to another embodiment of the present application;
fig. 3 is a block diagram of a structure of a variable frequency subway air conditioning unit control device according to an embodiment of the present application;
fig. 4 is a schematic diagram of a hardware structure of a control device of a variable-frequency subway air conditioning unit according to an embodiment of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
The existing air conditioner temperature control system of the subway vehicle carries out corresponding start-stop control and variable frequency regulation according to the difference value of indoor temperature and target temperature. Fig. 1 is a flowchart of a control method for an inverter subway air conditioning unit according to an embodiment of the present application, where as shown in fig. 1, the flowchart includes the following steps:
step S101, comparing the outdoor temperature Te variation value.
Specifically, the outdoor temperature outside the subway is obtained through the temperature sensor, and the change value of the outdoor temperature is obtained according to the current outdoor temperature and the previous outdoor temperature.
Step S102, judging the current outdoor temperature TenOutdoor temperature Te at the previous time pointn-1The outdoor temperature deviation starting amount X.
Specifically, if the current outdoor temperature Ten-the outdoor temperature Ten-1 at the previous time point is less than or equal to the outdoor temperature deviation starting adjustment amount X, continuously comparing the outdoor temperature Te change value; and if the current outdoor temperature Ten-1 at the previous time point is greater than the outdoor temperature deviation starting threshold value X, adjusting the frequency of the compressor. When the change of the outdoor temperature exceeds the deviation starting threshold value X, the change of the outdoor temperature is considered to cause the change of the indoor temperature, and the change of the indoor temperature exceeds the minimum adjustable quantity of the variable frequency adjustment of the air conditioning unit, and the corresponding matching can be carried out through the variable frequency of the air conditioning case.
And step S103, adjusting the frequency of the compressor.
Specifically, the compressor performs temperature adjustment in a refrigeration mode, and by acquiring an indoor temperature and a target temperature, the compressor performs frequency adjustment or start and stop according to a difference between the indoor temperature and the target temperature. The indoor temperature is detected, the indoor temperature is compared with the target temperature calculated by preset logic, and then corresponding adjustment is carried out, and the adjustment amount cannot be achieved at one time. Furthermore, the outdoor temperature and the indoor temperature are obtained through a preset time interval and are continuously compared and adjusted to gradually approach stability.
In this embodiment, when the compressor is operated without frequency constraint, Tin and Tic or Tih and Δ T are used to calculate the target frequency through PID, and the PID calculation formula is determined by the control system at preset time intervals. Wherein Tin is the indoor temperature, Tic is the refrigeration target temperature, Tih is the refrigeration target temperature, and Δ T is the temperature deviation value.
Setting a temperature deviation value delta T in a PID (proportion integration differentiation) compressor calculation formula, wherein when the-delta T is less than or equal to Tin-Tic and less than or equal to delta T (refrigeration) or the-delta T is less than or equal to Tin-Tih and less than or equal to delta T (heating); when the PID is stopped, the target frequency is kept unchanged.
The following is the PID formula adjustment logic for the refrigeration target temperature:
when Tin is more than or equal to Tic +2 delta T, the control system controls the compressor to start; when Tin is more than Tic plus delta T, the compressor runs, the control system judges the temperature change trend and the difference between Tin and Tic, and the running frequency of the compressor is automatically improved; when the Tic-delta T is less than or equal to the Tin and less than or equal to the Tic plus delta T, the control system keeps the running frequency of the compressor; when Tin is less than Tic-delta T, the compressor runs, the control system judges the temperature change trend and the difference between Tin and Tic, and the running frequency of the compressor is automatically reduced; and when Tin is less than or equal to Tic-2 delta T, the control system controls the compressor to stop.
The embodiment also provides a control method of the variable-frequency subway air conditioning unit. Fig. 2 is a flowchart of a method for controlling an inverter subway air conditioning unit according to another embodiment of the present application, where as shown in fig. 2, the flowchart includes the following steps:
step S201, acquiring an outdoor temperature outside the subway at preset time intervals.
Specifically, the temperature sensor acquires an outdoor temperature outside the subway according to a preset time interval. In this embodiment, the time interval may be 4 seconds, 5 seconds, 6 seconds, or other values.
Step S202, obtaining a variation value of the outdoor temperature according to the current outdoor temperature and the outdoor temperature of the previous time point.
Specifically, the change value of the outdoor temperature is obtained by subtracting the outdoor temperature at the previous time point from the current outdoor temperature Te.
Step S203, if the variation value is greater than the deviation threshold, inputting the variation value into the temperature control model to obtain a frequency adjustment value.
Specifically, if the variation value is greater than a deviation starting threshold value, inputting the variation value into a temperature control model to obtain a frequency adjustment value; and if the change value is less than or equal to the deviation starting threshold value, calculating the change value of the next outdoor temperature according to the outdoor temperature at the next time point and the current outdoor temperature.
If the variation value is greater than the deviation starting threshold value, inputting the variation value into a temperature control model, and obtaining a frequency adjustment value includes: acquiring subway structure parameters and minimum adjustable refrigerating capacity; obtaining a deviation starting threshold value according to the subway structure parameters and the minimum adjustable refrigerating capacity; and if the change value is larger than the deviation starting threshold value, inputting the change value into a temperature control model to obtain a frequency adjustment value.
Wherein, the subway structure parameter includes: the solar radiation, the solar heat gain coefficient, the heat transfer coefficient of the vehicle body enclosure structure and the heat transfer area received by the transparent enclosure structure.
Specifically, the deviation threshold value X is (minimum adjustable cooling capacity-solar radiation received by the transparent enclosure × solar heat gain coefficient)/(vehicle body enclosure heat transfer coefficient × heat transfer area).
If the variation value is greater than the deviation starting threshold value, inputting the variation value into a temperature control model, and before obtaining the frequency adjustment value, the method includes: acquiring historical operation data of a subway air conditioning unit in a preset time period; according to the historical operation data, acquiring a corresponding frequency calculation coefficient of outdoor temperature, an in-vehicle temperature correction coefficient and an outdoor temperature correction coefficient; and generating a temperature control model according to the outdoor temperature corresponding frequency calculation coefficient, the in-vehicle temperature correction coefficient and the outdoor temperature correction coefficient.
Specifically, according to the historical operation data, the solar radiation, the solar heat gain coefficient, the heat transfer coefficient of the vehicle body enclosure structure and the heat transfer area received by the transparent enclosure structure are obtained; and obtaining a corresponding frequency calculation coefficient of the outdoor temperature according to the solar radiation received by the transparent enclosure structure, the solar heat gain coefficient, the heat transfer coefficient of the vehicle body enclosure structure and the heat transfer area.
In this embodiment, the temperature control model is Δ F2＝A*(Ten-Ten-1)*BTk*CT0. Wherein, Δ F2Is the frequency adjustment value of the outdoor temperature, A is the calculation coefficient of the corresponding frequency of the outdoor temperature, TenAs the current outdoor temperature, Ten-1To the outdoor temperature at the previous time point, BTkOutdoor temperature correction coefficient and CT0And the temperature correction coefficient in the vehicle is obtained. Further, under different working condition temperatures, refrigerating capacity curves under different frequencies are obtained through testing; and by collecting actual operation data, big data analysis is carried out, and the corresponding coefficient A, BT is further correctedK、CT0The value is obtained. Wherein A is the frequency correction coefficient corresponding to the outdoor temperature, the essence of the frequency correction coefficient is that the frequency of the compressor is increased/decreased by A, and the corresponding increased/decreased cooling capacity corresponds to the increased/decreased heat gain of the vehicle caused by the outdoor temperature. And the value A is correspondingly changed according to different compressor types and different system designs, and is obtained by testing the performance of the vehicle-mounted air conditioner to obtain initial data and analyzing and fitting the initial data. And further, analyzing and correcting a frequency correction coefficient corresponding to the outdoor temperature according to the historical operation data. In one embodiment, taking a 37kW passenger room air conditioning unit of a B-type vehicle as an example, 2 air conditioning units in one compartment, the refrigerating capacity is considered to change linearly with frequency, and the rated capacity is simply and roughly calculatedUnder a constant working condition, namely, the refrigerating capacity regulated per 1Hz is 37 multiplied by 2/48 (rated frequency) ═ 1.5kW, A ═ solar radiation received by the transparent enclosure structure multiplied by solar heat gain coefficient/[ delta ] Te + heat transfer coefficient multiplied by heat transfer area of the vehicle body enclosure structure]/1.5. Δ Te is a change value of the outdoor temperature.
BTKIs the outdoor temperature correction coefficient, CT0The indoor temperature correction coefficient is the indoor temperature correction coefficient, the essence of the indoor temperature correction coefficient is that the refrigerating capacity of the unit can change according to the change of the outdoor temperature and the indoor temperature, and the outdoor temperature correction coefficient and the indoor temperature correction coefficient are initially determined by comparing refrigerating capacity curves under different temperature working conditions. And further, analyzing and correcting an outdoor temperature correction coefficient and an indoor temperature correction coefficient according to the historical operation data.
By perfecting the preset frequency temperature control model according to historical operating data, the adjustment of the refrigerating capacity of the air conditioning unit is closer to the actual load change condition, the trial stabilization stage of passively calculating and adjusting the compressor frequency according to the room temperature fluctuation is greatly shortened, the room temperature fluctuation stage can be eliminated in an ideal state, and the carriage can keep a comfortable and stable temperature for a long time.
And step S204, adjusting the frequency of the compressor of the air conditioning unit to a frequency adjustment value.
Specifically, the frequency of the compressor of the air conditioning unit is adjusted according to the outdoor temperature frequency adjustment value. And calculating a frequency adjustment value required to be made by the compressor according to the load change according to the temperature control model, and directly adjusting the frequency of the compressor to adapt to the change of the load or reducing the time for carrying out load matching by frequency adjustment of the compressor so as to keep the indoor temperature in the subway stable.
The frequency adjustment of the compressor of the air conditioning unit according to the frequency adjustment value comprises: acquiring a temperature value and a return air temperature correction value of an indoor sensor of a subway; and obtaining an actual indoor temperature value according to the indoor sensor temperature value and the return air temperature correction value.
In one embodiment, the actual indoor temperature value is calculated by the formula: tin + h. Wherein Tin is the temperature value of the indoor sensor of the subway, h is the corrected value of the return air temperature, and Tin is the actual indoor temperature value. Furthermore, the return air temperature sensor of the air conditioning unit is usually arranged on the arched cover plates on two sides of the carriage to obtain the temperature value of the subway indoor sensor, and can be influenced by the temperature of the outer surface of the vehicle body to a certain extent, and a +/-return air temperature correction value h can be preset according to the difference between the subway indoor sensor temperature value obtained through actual detection and the actual indoor temperature value. Furthermore, different return air temperature correction values h are preset according to an external temperature interval by setting a piecewise function, analysis is carried out according to the historical operating data, and more accurate return air temperature correction values h are generated through external temperature fitting for deviation correction.
Through the steps, the frequency of the variable frequency compressor is actively preset to adapt to the change of the load in the vehicle caused by the change of the outdoor temperature, the problem that the external temperature is severely fluctuated when the vehicle enters or exits the tunnel is solved, and the indoor temperature is kept at a comfortable temperature.
It should be noted that the steps illustrated in the above-described flow diagrams or in the flow diagrams of the figures may be performed in a computer system, such as a set of computer-executable instructions, and that, although a logical order is illustrated in the flow diagrams, in some cases, the steps illustrated or described may be performed in an order different than here.
The embodiment also provides a control device of a variable-frequency subway air conditioning unit, which is used for implementing the above embodiments and preferred embodiments, and the description of the devices is omitted. As used hereinafter, the terms "module," "unit," "subunit," and the like may implement a combination of software and/or hardware for a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 3 is a block diagram of a control device of a variable-frequency subway air conditioning unit according to an embodiment of the present application, and as shown in fig. 3, the device includes: a temperature acquisition module 310, a variation value acquisition module 320, a frequency calculation module 330, and a frequency adjustment module 340.
The temperature obtaining module 310 is configured to obtain an outdoor temperature outside the subway.
The variation value obtaining module 320 is configured to obtain a variation value of the outdoor temperature according to the outdoor temperature.
The frequency calculation module 330 is configured to input the variation value into the temperature control model to obtain a frequency adjustment value if the variation value is greater than a deviation starting threshold.
And the frequency adjusting module 340 is configured to perform frequency adjustment on a compressor of the air conditioning unit according to the frequency adjustment value.
The frequency calculation module 330 is further configured to obtain subway structure parameters and a minimum adjustable refrigeration capacity; obtaining a deviation starting threshold value according to the subway structure parameters and the minimum adjustable refrigerating capacity; and if the change value is larger than the deviation starting threshold value, inputting the change value into a temperature control model to obtain a frequency adjustment value.
The frequency calculation module 330 is further configured to obtain historical operating data of the iron air conditioning unit within a preset time period; according to the historical operation data, acquiring a corresponding frequency calculation coefficient of outdoor temperature, an in-vehicle temperature correction coefficient and an outdoor temperature correction coefficient; and generating a temperature control model according to the outdoor temperature corresponding frequency calculation coefficient, the in-vehicle temperature correction coefficient and the outdoor temperature correction coefficient.
The frequency calculation module 330 is further configured to obtain solar radiation, a solar heat gain coefficient, a vehicle body envelope heat transfer coefficient and a heat transfer area received by the transparent envelope according to the historical operation data; and obtaining a corresponding frequency calculation coefficient of the outdoor temperature according to the solar radiation received by the transparent enclosure structure, the solar heat gain coefficient, the heat transfer coefficient of the vehicle body enclosure structure and the heat transfer area.
The frequency calculation module 330 is further used for the temperature control model to be af2＝A*(Ten-Ten-1)*BTk*CT0。
The frequency adjustment module 340 is further configured to obtain a temperature value of an indoor sensor of the subway and a corrected value of the return air temperature; and obtaining an actual indoor temperature value according to the indoor sensor temperature value and the return air temperature correction value.
The above modules may be functional modules or program modules, and may be implemented by software or hardware. For a module implemented by hardware, the modules may be located in the same processor; or the modules can be respectively positioned in different processors in any combination.
In addition, the control method for the inverter subway air conditioning unit described in the embodiment of the present application and described in conjunction with fig. 1 may be implemented by inverter subway air conditioning unit control equipment. Fig. 4 is a schematic diagram of a hardware structure of a control device of a variable-frequency subway air conditioning unit according to an embodiment of the application.
The inverter subway air conditioning unit control apparatus may include a processor 41 and a memory 42 storing computer program instructions.
Specifically, the processor 41 may include a Central Processing Unit (CPU), or A Specific Integrated Circuit (ASIC), or may be configured to implement one or more Integrated circuits of the embodiments of the present Application.
The processor 41 reads and executes the computer program instructions stored in the memory 42 to implement any one of the control methods of the inverter subway air conditioning unit in the above embodiments.
In some embodiments, the inverter subway air conditioning unit control equipment further comprises a communication interface 43 and a bus 40. As shown in fig. 4, the processor 41, the memory 42, and the communication interface 43 are connected via the bus 40 to complete mutual communication.
The communication interface 43 is used for implementing communication between modules, devices, units and/or apparatuses in the embodiments of the present application. The communication port 43 may also be implemented with other components such as: the data communication is carried out among external equipment, image/data acquisition equipment, a database, external storage, an image/data processing workstation and the like.
The variable-frequency subway air conditioning unit control device can execute the variable-frequency subway air conditioning unit control method in the embodiment of the application based on the acquired outdoor temperature, so that the variable-frequency subway air conditioning unit control method described in combination with fig. 1 is realized.
In addition, by combining the control method of the variable-frequency subway air conditioning unit in the above embodiments, the embodiments of the present application can be implemented by providing a computer-readable storage medium. The computer readable storage medium having stored thereon computer program instructions; when being executed by a processor, the computer program instructions realize the control method of the variable-frequency subway air conditioning unit in any one of the above embodiments.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A control method of a variable-frequency subway air conditioning unit is characterized by comprising the following steps:
acquiring the outdoor temperature outside the subway at preset time intervals;
obtaining a change value of the outdoor temperature according to the current outdoor temperature and the outdoor temperature at the previous time point;
if the change value is larger than a deviation starting threshold value, inputting the change value into a temperature control model to obtain a frequency adjustment value;
and adjusting the frequency of the compressor of the air conditioning unit to a frequency adjustment value.
2. The method for controlling an inverter subway air conditioning unit according to claim 1, wherein said inputting said variation value into a temperature control model if said variation value is greater than a deviation threshold, and obtaining a frequency adjustment value comprises:
acquiring subway structure parameters and minimum adjustable refrigerating capacity;
obtaining a deviation starting threshold value according to the subway structure parameters and the minimum adjustable refrigerating capacity;
and if the change value is larger than the deviation starting threshold value, inputting the change value into a temperature control model to obtain a frequency adjustment value.
3. The control method of the variable-frequency subway air conditioning unit as claimed in claim 2, wherein said subway structure parameters include: the solar radiation, the solar heat gain coefficient, the heat transfer coefficient of the vehicle body enclosure structure and the heat transfer area received by the transparent enclosure structure.
4. The method for controlling an inverter subway air conditioning unit according to claim 1, wherein if said variation value is greater than a deviation threshold, inputting said variation value into a temperature control model, and before obtaining a frequency adjustment value, comprising:
acquiring historical operation data of a subway air conditioning unit in a preset time period;
according to the historical operation data, acquiring a corresponding frequency calculation coefficient of outdoor temperature, an in-vehicle temperature correction coefficient and an outdoor temperature correction coefficient;
and generating a temperature control model according to the outdoor temperature corresponding frequency calculation coefficient, the in-vehicle temperature correction coefficient and the outdoor temperature correction coefficient.
5. The method for controlling the inverter subway air conditioning unit as claimed in claim 4, wherein said obtaining the calculation coefficient of the frequency corresponding to the outdoor temperature according to the historical operation data comprises:
according to the historical operation data, obtaining solar radiation, solar heat gain coefficient, heat transfer coefficient and heat transfer area of the vehicle body enclosure structure received by the transparent enclosure structure;
and obtaining a corresponding frequency calculation coefficient of the outdoor temperature according to the solar radiation received by the transparent enclosure structure, the solar heat gain coefficient, the heat transfer coefficient of the vehicle body enclosure structure and the heat transfer area.
6. The control method of variable-frequency subway air conditioning unit as claimed in claim 1, wherein said temperature control model is Δ F2＝A*(Ten-Ten-1)*BTk*CT0。
7. The inverter subway air conditioning unit control method as claimed in claim 1, wherein said adjusting the frequency of the compressor of the air conditioning unit according to said frequency adjustment value comprises:
acquiring a temperature value and a return air temperature correction value of an indoor sensor of a subway;
and obtaining an actual indoor temperature value according to the indoor sensor temperature value and the return air temperature correction value.
8. The utility model provides a frequency conversion subway air conditioning unit control device which characterized in that includes:
the temperature acquisition module is used for acquiring the outdoor temperature outside the subway;
the change value acquisition module is used for acquiring the change value of the outdoor temperature according to the outdoor temperature;
the frequency calculation module is used for inputting the change value into the temperature control model to obtain a frequency adjustment value if the change value is greater than a deviation starting threshold value;
and the frequency adjusting module is used for adjusting the frequency of the compressor of the air conditioning unit according to the frequency adjusting value.
9. Computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the inverter subway air conditioning unit control method according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, wherein the program, when executed by a processor, implements the inverter subway air conditioning unit control method as claimed in any one of claims 1 to 7.
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