CN114576790A - Air conditioner control device and central air conditioner - Google Patents
Air conditioner control device and central air conditioner Download PDFInfo
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- CN114576790A CN114576790A CN202210477763.XA CN202210477763A CN114576790A CN 114576790 A CN114576790 A CN 114576790A CN 202210477763 A CN202210477763 A CN 202210477763A CN 114576790 A CN114576790 A CN 114576790A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 183
- 238000001514 detection method Methods 0.000 claims abstract description 64
- 238000000034 method Methods 0.000 claims description 28
- 238000004378 air conditioning Methods 0.000 claims description 23
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- 230000001105 regulatory effect Effects 0.000 abstract description 8
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- 238000001816 cooling Methods 0.000 description 4
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- 238000004134 energy conservation Methods 0.000 description 1
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention is suitable for the control field, and discloses an air conditioner control device and a central air conditioner, wherein the device comprises M electromagnetic valves and a control module, each electromagnetic valve comprises two opening states, namely 100% full opening and x% minimum opening, the cost of the electromagnetic valve is greatly reduced compared with the flow regulating valve in the prior art, and the minimum opening is not 0, so that the noise generated by the friction of internal parts of the electromagnetic valve during the switching of the opening states is weakened, and the cost of the central air conditioner is reduced; and the control module controls the ith electromagnetic valve to switch for many times between two opening states of the ith electromagnetic valve according to the detection data and the target data of the position of the ith heat exchanger in each water supply period until the water supply amount corresponding to the target data is output to the ith heat exchanger.
Description
Technical Field
The invention relates to the field of control, in particular to an air conditioner control device and a central air conditioner.
Background
The water system of the central air conditioner can provide cooling capacity for each room by directly outputting cold water to the heat exchangers arranged in different rooms. However, since the cooling load is different for each room and the required cooling capacity is naturally different, the flow rate of cold water to be output to each heat exchanger needs to be distributed.
The control system of the central air conditioner comprises an air conditioner controller, and the method adopted in the prior art for realizing the distribution of cold water flow is that the air conditioner controller controls the opening degree of flow regulating valves arranged in different rooms so as to further realize the control of the cold water flow output to a heat exchanger, but the price of the flow regulating valves is very high, so that the cost of the whole central air conditioner is increased.
Disclosure of Invention
The invention aims to provide an air conditioner control device and a central air conditioner, which realize the reduction of the cost of the whole central air conditioner, strengthen the heat transfer performance of a heat exchanger by generating pulsating flow and enhance the energy efficiency of the air conditioner.
In order to solve the technical problem, the invention provides an air conditioner control device which is applied to a water system of a central air conditioner, wherein the water system comprises a circulating water pump and heat exchangers arranged at M different positions, wherein M is more than or equal to 1 and is an integer; the air conditioner control device comprises M electromagnetic valves and a control module; each electromagnetic valve comprises two opening states, wherein the two opening states are respectively 100% full opening and x% minimum opening, and x is more than 0 and less than 100;
the first ends of the M electromagnetic valves are connected with the water outlet end of the circulating water pump, the second ends of the M electromagnetic valves are respectively connected with the water inlet ends of the M heat exchangers in a one-to-one correspondence manner, the water outlet ends of the M heat exchangers are connected with the water inlet end of the circulating water pump after being connected, and the control ends of the M electromagnetic valves are connected with the control module;
the control module is used for controlling the ith electromagnetic valve to switch for multiple times between two opening states of the ith electromagnetic valve based on the acquired detection data and target data of the position where the ith heat exchanger is located according to each water supply period until the water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the positions where the M heat exchangers are located are adjusted to the target data, wherein i is greater than or equal to 1 and less than or equal to M, and i is an integer.
Preferably, the air conditioner control device further comprises a water flow stabilizer;
the water outlet ends of the M heat exchangers are connected with the water inlet end of the water flow stabilizer, and the water outlet end of the water flow stabilizer is connected with the water inlet end of the circulating water pump and used for treating the water flow flowing into the water flow stabilizer so that the pressure of the water flow flowing out of the water flow stabilizer is stabilized within a preset water pressure range.
Preferably, the air conditioning control device further comprises M first temperature sensors;
the M first temperature sensors are respectively arranged at the positions of the water outlet ends of the M heat exchangers one by one, and the ith first temperature sensor is used for detecting the first temperature of the position of the water outlet end of the ith heat exchanger;
the method for controlling the ith electromagnetic valve to switch for multiple times between two opening states of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger until the water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the positions of the M heat exchangers are adjusted to the target data comprises the following steps:
and controlling the ith electromagnetic valve to switch between two opening states for multiple times based on the acquired first temperature and the target temperature of the position of the ith heat exchanger until the water supply amount corresponding to the target temperature is output to the ith heat exchanger, so that the first temperature of the position of the M heat exchangers is adjusted to the target temperature.
Preferably, the air conditioning control device further includes M first flow meters;
the input end of the ith first flowmeter is connected with the second end of the ith electromagnetic valve, and the output end of the ith first flowmeter is connected with the water inlet end of the ith heat exchanger and is used for detecting the first flow of water flowing into the ith heat exchanger;
the method for controlling the ith electromagnetic valve to switch for multiple times between two opening states of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger until the water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the positions of the M heat exchangers are adjusted to the target data comprises the following steps:
and controlling the first flow and the target flow of the position of the ith heat exchanger based on the acquired first flow and the target flow, and switching the ith electromagnetic valve between two opening states of the ith electromagnetic valve for multiple times until the water supply amount corresponding to the target flow is output to the ith heat exchanger, so that the first flow of the position of the M heat exchangers is adjusted to the target flow.
Preferably, the air conditioning control device further includes M second temperature sensors, M third temperature sensors, and M second flow meters;
the input end of the ith second flowmeter is connected with the second end of the ith electromagnetic valve, and the output end of the ith second flowmeter is connected with the water inlet end of the ith heat exchanger and is used for detecting the second flow of water flowing into the ith heat exchanger;
the M second temperature sensors are respectively arranged at the positions of the water inlet ends of the M heat exchangers one by one, and the ith second temperature sensor is used for detecting the second temperature of the position of the water inlet end of the ith heat exchanger;
the M third temperature sensors are respectively arranged at the positions of the water outlet ends of the M heat exchangers one by one, and the ith third temperature sensor is used for detecting the third temperature of the position of the water outlet end of the ith heat exchanger;
the method for controlling the ith electromagnetic valve to switch for multiple times between two opening states of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger until the water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the positions of the M heat exchangers are adjusted to the target data comprises the following steps:
and determining the measured heat exchange amount of the ith heat exchanger according to the obtained second temperature, third temperature and second flow of the position of the ith heat exchanger, and controlling the ith electromagnetic valve to switch between two opening states for multiple times based on the measured heat exchange amount and the target heat exchange amount of the ith heat exchanger until water supply amount corresponding to the target heat exchange amount is output to the ith heat exchanger, so that the measured heat exchange amount of the M heat exchangers is adjusted to the target heat exchange amount.
Preferably, each of the electromagnetic valves further includes a plurality of opening states, wherein an opening value of each of the opening states is one of the number between x and 100, and each of the opening states is different;
the method for controlling the ith electromagnetic valve to switch for multiple times between two opening states of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger until the water supply amount corresponding to the target data is output to the ith heat exchanger comprises the following steps:
and controlling the ith electromagnetic valve to switch among various opening states of the ith electromagnetic valve for multiple times based on the acquired detection data and target data of the position of the ith heat exchanger until the water supply amount corresponding to the target data is output to the ith heat exchanger.
Preferably, the control module comprises an electromagnetic valve controller and M PWM controllers;
the input ends of the M PWM controllers are respectively connected with the M first output ends of the electromagnetic valve controllers in a one-to-one correspondence manner, and the output ends of the M PWM controllers are respectively connected with the first control ends of the M electromagnetic valves in a one-to-one correspondence manner; m second output ends of the electromagnetic valve controller are respectively connected with the second control ends of the M electromagnetic valves in a one-to-one correspondence manner;
the electromagnetic valve controller is used for controlling the opening state of the ith electromagnetic valve and controlling the ith PWM controller to output opening and closing frequency and bandwidth in the opening state based on the acquired detection data and target data of the position of the ith heat exchanger in each water supply period so as to control the ith electromagnetic valve to switch for multiple times between various opening states of the ith electromagnetic valve until the water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the position of the M heat exchangers is adjusted to the target data.
Preferably, a pre-trained control parameter determination model is stored in the electromagnetic valve controller;
controlling the opening state of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger, and outputting the opening and closing frequency and bandwidth in the opening state through the ith PWM controller, wherein the opening and closing frequency and bandwidth comprise:
inputting the acquired detection data and target data of the position of the ith heat exchanger to the control parameter determination model, controlling the opening state of the ith electromagnetic valve according to first opening control data output by the control parameter determination model, and outputting the opening and closing frequency and bandwidth of the opening state according to first pulse control data output by the control parameter determination model through the ith PWM controller.
Preferably, a pre-designed disturbance control algorithm is further stored in the electromagnetic valve controller;
controlling the opening state of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger, and outputting the opening and closing frequency and bandwidth in the opening state through the ith PWM controller, wherein the opening and closing frequency and bandwidth comprise:
inputting the acquired detection data and target data of the position of the ith heat exchanger into the control parameter determination model to obtain first opening control data and first pulse control data output by the control parameter determination model, performing parameter accurate calibration processing on the first opening control data and the first pulse control data according to the disturbance control algorithm, controlling the opening state of the ith electromagnetic valve based on second opening control data obtained after the parameter accurate calibration processing, and controlling the opening and closing frequency and bandwidth of the ith PWM controller output in the opening state based on second pulse control data obtained after the parameter accurate calibration processing.
In order to solve the technical problem, the invention also provides a central air conditioner, which comprises a circulating water pump, heat exchangers arranged at M different positions and an air conditioner control device;
the circulating water pump is sequentially connected with the air conditioner control device and the M heat exchangers.
The invention provides an air conditioner control device and a central air conditioner, wherein the air conditioner control device comprises M electromagnetic valves and a control module, on one hand, each electromagnetic valve comprises two opening states which are respectively 100% full opening and x% minimum opening, the cost of the electromagnetic valve is greatly reduced compared with a flow regulating valve used in the prior art, the minimum opening is not 0, the noise generated by the friction of parts in the electromagnetic valve during the switching of the opening states is weakened to a certain extent, and the cost of the whole central air conditioner is also reduced; on the other hand, the control module can control the ith electromagnetic valve to switch for multiple times between two opening states of the ith electromagnetic valve according to the acquired detection data and target data of the position of the ith heat exchanger until the water supply amount corresponding to the target data is output to the ith heat exchanger, the multiple switching mode can generate pulsating flow to further strengthen the heat transfer performance of the heat exchanger, the energy efficiency of the air conditioner is enhanced, and finally the detection data of the positions of the M heat exchangers are adjusted to the target data.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an air conditioner control device provided by the present invention;
FIG. 2 is a schematic structural diagram of another air conditioning control device provided by the present invention;
fig. 3 is a schematic structural diagram and a schematic flow curve diagram of an electromagnetic valve in two opening states, where fig. 3 (a) is a schematic structural diagram of the electromagnetic valve in a 100% opening state, fig. 3 (b) is a schematic structural diagram of the electromagnetic valve in an x% opening state, and fig. 3 (c) is a schematic flow curve diagram of the electromagnetic valve in two opening states;
FIG. 4 is a schematic structural diagram of another air conditioning control device provided by the present invention;
FIG. 5 is a schematic structural diagram of another air conditioning control device provided by the present invention;
FIG. 6 is a graphical illustration of the flow through each solenoid valve provided by the present invention;
FIG. 7 is a graphical illustration of another flow rate through each solenoid valve provided by the present invention;
FIG. 8 is a graphical illustration of another flow rate through each solenoid valve provided by the present invention;
fig. 9 is a schematic structural diagram of a central air conditioner according to the present invention.
Detailed Description
The core of the invention is to provide an air conditioner control device and a central air conditioner, which realize the reduction of the cost of the whole central air conditioner, strengthen the heat transfer performance of a heat exchanger by generating pulsating flow and enhance the energy efficiency of the air conditioner.
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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an air conditioning control device according to the present invention.
The air conditioner control device is applied to a water system of a central air conditioner, wherein the water system comprises a circulating water pump and heat exchangers arranged at M different positions, M is more than or equal to 1 and is an integer; the air conditioner control device comprises M electromagnetic valves 1 and a control module 2; each electromagnetic valve 1 comprises two opening states, wherein the two opening states are 100% full opening and x% minimum opening respectively, and x is more than 0 and less than 100;
the first ends of the M electromagnetic valves 1 are connected with the water outlet end of the circulating water pump, the second ends of the M electromagnetic valves 1 are respectively connected with the water inlet ends of the M heat exchangers in a one-to-one correspondence manner, the water outlet ends of the M heat exchangers are connected with the water inlet end of the circulating water pump after being connected, and the control ends of the M electromagnetic valves 1 are connected with the control module 2;
the control module 2 is used for controlling the ith electromagnetic valve 1 to switch for multiple times between two opening states of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger according to each water supply period until the water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the positions of the M heat exchangers are adjusted to the target data, wherein i is more than or equal to 1 and less than or equal to M, and i is an integer.
In this embodiment, in the prior art, the air conditioner controller controls the opening degrees of the flow regulating valves disposed in different rooms to distribute the cold water flow, but considering that the price of the flow regulating valves is very high, the cost of the whole central air conditioner is very high. In order to solve the technical problem, the application provides an air conditioner control device, which reduces the cost of the whole central air conditioner by arranging an electromagnetic valve 1 with two opening states.
Specifically, as shown in fig. 1, M =3 is illustrated in fig. 1, and it should be firstly explained that fig. 1 is limited by the space and drawing requirements shown in the drawings, where the control module 2 is given in the form of a circle with reference numbers, and the water system of the central air conditioner includes a circulating water pump and heat exchangers disposed at M different positions, where the circulating water pump is used for supplying water, and the water supply is hot water if the central air conditioner wants to heat, and the water supply is cold water if the central air conditioner wants to cool, and the application is not particularly limited herein; the different positions can be different rooms which are correspondingly regulated and controlled by the central air conditioner, and the heat exchanger comprises but not limited to a coil pipe and can generate certain cooling capacity by compressing steam during refrigeration so as to realize circulating heat exchange.
Thus, the air conditioner control device may include M solenoid valves 1 and a control module 2; the electromagnetic valves 1 respectively comprise two opening states, wherein the two opening states are 100% full opening and x% minimum opening, x comprises but is not limited to an integer, and only x is greater than 0 and less than 100, and the setting is performed according to actual requirements, and it can be understood that 100% full opening can also be set to be a certain opening value which is less than 100 and greater than x according to the requirements of users; in some civil occasions where the requirement on the control accuracy is not high, x may take a certain value between 0 and 40, for example, 10, so that the electromagnetic valve 1 includes two opening states, and the two opening states are 100% full opening and 10% minimum opening, respectively, which is not particularly limited in this application, please refer to fig. 2, fig. 2 is a schematic structural diagram of another air conditioner control device provided by the present invention, fig. 2 is also briefly described with M =3 as an example, and the water flow can generate a pulsating flow through the electromagnetic valve 1 controlled by each control module 2; and with further reference to fig. 3, fig. 3 shows a schematic structural diagram and a schematic flow curve diagram of the solenoid valve 1 in two opening states, where fig. 3 (a) is a schematic structural diagram of the solenoid valve 1 in a 100% opening state, fig. 3 (b) is a schematic structural diagram of the solenoid valve 1 in an x% opening state, and fig. 3 (c) is a schematic flow curve diagram of the solenoid valve 1 in two opening states.
Then, the control module 2 controls the ith electromagnetic valve 1 to switch for multiple times between two opening states thereof until the water supply amount corresponding to the target data is output to the ith heat exchanger based on the acquired detection data and the target data of the position where the ith heat exchanger is located in each water supply period, wherein the multiple switching mode can generate pulsating flow to further strengthen the heat transfer performance of the heat exchanger, enhance the energy efficiency of the air conditioner, and finally adjust the detection data of the position where the M heat exchangers are located to the target data.
It should be noted that, when the substance output to the solenoid valve 1 is a refrigerant or a heating agent, the purpose of temperature adjustment required by the central air conditioner can be achieved according to the above control logic of the control module 2 in the present application, and the present application is not limited thereto.
It should be noted that the air conditioner control device provided in the present application may be applied not only to a water system of a central air conditioner, but also to all devices having heat exchange branches, such as an air source heat pump, a multi-branch refrigeration device, and the like, and the present application is not limited thereto.
In addition, as supplementary explanation, the central air conditioner including the air conditioner control device, taking a refrigeration central air conditioner as an example, the starting and stopping scheme in the specific practical application may be that, when starting, the M electromagnetic valves 1 are first controlled to be adjusted to 100% full-open degree, then the circulating water pump is started, after the cold water temperature of the connecting pipeline of the circulating water pump is detected to be reduced to a certain degree, wherein the certain degree of the cold water temperature is determined according to the use scene, generally 5 to 20 ℃, and then the control logic for the air conditioner control device in the present application is started; and when the machine is stopped, the M electromagnetic valves 1 are controlled to be adjusted to 100% full-open degree, and then the circulating water pump is stopped.
In summary, the present application provides an air conditioner control device, on one hand, each solenoid valve 1 includes two opening states, the cost of the solenoid valve 1 is greatly reduced compared with a flow regulating valve used in the prior art, and the minimum opening here is not 0, so that noise generated by friction of components inside the solenoid valve 1 when the opening states are switched is weakened to a certain extent, the occurrence of a situation that the water circulation stability is affected when a 0% opening state occurs is avoided, the water hammer effect is avoided, and the cost of the whole central air conditioner is also reduced; on the other hand, the control module 2 can control the ith electromagnetic valve 1 to switch between two opening states for multiple times to generate pulsating flow according to each water supply period, so that the heat transfer performance of the heat exchanger is enhanced, the energy efficiency of the air conditioner is enhanced, energy conservation and emission reduction are facilitated, and finally the detection data of the positions of the M heat exchangers are adjusted to the target data.
On the basis of the above-described embodiment:
as a preferred embodiment, the air conditioning control device further comprises a water flow stabilizer;
the water outlet ends of the M heat exchangers are connected with the water inlet end of the water flow stabilizer, and the water outlet end of the water flow stabilizer is connected with the water inlet end of the circulating water pump and used for processing the water flow flowing into the water flow stabilizer so that the pressure of the water flow flowing out of the water flow stabilizer is stabilized within a preset water pressure range.
In this embodiment, the inventor further considers that the pulsating flow may cause a certain impact on the circulating water pump, and therefore the air conditioning control device may further include a water flow stabilizer, through which the pulsating flow flowing through the M heat exchangers flows back to the circulating water pump, and by processing the water flow flowing into itself, the pressure of the water flow flowing out of itself may be stabilized within a preset water pressure range, so as to stabilize the flow rate of the water flow, thereby protecting the circulating water pump.
It is understood that the preset water pressure range is set according to actual requirements, and the application is not limited in particular.
As a preferred embodiment, the air conditioning control device further includes M first temperature sensors;
the M first temperature sensors are respectively arranged at the positions of the water outlet ends of the M heat exchangers one by one, and the ith first temperature sensor is used for detecting the first temperature of the position of the water outlet end of the ith heat exchanger;
based on the acquired detection data and target data of the position of the ith heat exchanger, the ith electromagnetic valve 1 is controlled to switch for multiple times between two opening states until water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the position of the M heat exchangers is adjusted to the target data, and the method comprises the following steps:
and controlling the ith electromagnetic valve 1 to switch for multiple times between two opening states of the ith electromagnetic valve based on the acquired first temperature of the position of the ith heat exchanger and the target temperature until the water supply amount corresponding to the target temperature is output to the ith heat exchanger, so that the first temperature of the position of the M heat exchangers is adjusted to the target temperature.
In this embodiment, considering that in some occasions with low requirements on control accuracy, such as civil occasions, control is usually performed according to temperature, the air conditioner control device may further include M first temperature sensors, the control module 2 stores a target temperature for the position of the ith heat exchanger, and then the ith electromagnetic valve 1 may be controlled to switch between two opening states of the ith electromagnetic valve 1 based on the acquired first temperature and the target temperature of the position of the ith heat exchanger until water supply amount corresponding to the target temperature is output to the ith heat exchanger, so as to adjust the first temperature of the position of the M heat exchangers to the target temperature, where the target temperature may be set according to requirements. Therefore, the control logic is simple and reliable to implement and easy to implement.
It should be noted that, in a specific practical application, the ith first temperature sensor disposed at the position of the water outlet end of the ith heat exchanger may be disposed at an air conditioner passage near the water outlet end of the ith heat exchanger, or may be further disposed in a room where temperature control is required, for example, the first temperature sensor may be disposed in a data room to detect an air temperature in the data room and use a detection result as the first temperature, or the first temperature sensor may be disposed in a cold room to detect an air temperature in the cold room and use a detection result as the first temperature.
As a preferred embodiment, the air conditioning control device further includes M first flow meters;
the input end of the ith first flowmeter is connected with the second end of the ith electromagnetic valve 1, and the output end of the ith first flowmeter is connected with the water inlet end of the ith heat exchanger and used for detecting the first flow of water flowing into the ith heat exchanger;
based on the acquired detection data and target data of the position of the ith heat exchanger, the ith electromagnetic valve 1 is controlled to be switched for many times between two opening states until water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the position of the M heat exchangers is adjusted to the target data, and the method comprises the following steps:
and controlling the ith electromagnetic valve 1 to switch between two opening states of the ith electromagnetic valve for multiple times based on the acquired first flow and the target flow of the position of the ith heat exchanger until the water supply amount corresponding to the target flow is output to the ith heat exchanger, so that the first flow of the position of the M heat exchangers is adjusted to the target flow.
In this embodiment, in consideration of the fact that in some cases, there is a demand from a user for the flow rate flowing into the heat exchanger, that is, the target flow rate, the air conditioning control device may further include M first flow meters, and based on the first flow rate at the position of the ith heat exchanger and the target flow rate, the ith solenoid valve 1 may be controlled to switch between two opening states thereof for multiple times until the water supply amount corresponding to the target flow rate is output to the ith heat exchanger, so as to adjust the first flow rate at the position of the M heat exchangers to the target flow rate, where the target flow rate is set according to the demand, and it is clear that the above control logic is simple and reliable and is easy to implement.
As a preferred embodiment, the air conditioning control device further includes M second temperature sensors 4, M third temperature sensors 5, and M second flow meters 3;
the input end of the ith second flowmeter 3 is connected with the second end of the ith electromagnetic valve 1, and the output end of the ith second flowmeter 3 is connected with the water inlet end of the ith heat exchanger and used for detecting the second flow of water flowing into the ith heat exchanger;
the M second temperature sensors 4 are respectively arranged at the positions of the water inlet ends of the M heat exchangers one by one, and the ith second temperature sensor 4 is used for detecting the second temperature of the position of the water inlet end of the ith heat exchanger;
the M third temperature sensors 5 are respectively arranged at the positions of the water outlet ends of the M heat exchangers one by one, and the ith third temperature sensor 5 is used for detecting the third temperature of the position of the water outlet end of the ith heat exchanger;
based on the acquired detection data and target data of the position of the ith heat exchanger, the ith electromagnetic valve 1 is controlled to be switched for many times between two opening states until water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the position of the M heat exchangers is adjusted to the target data, and the method comprises the following steps:
and determining the measured heat exchange quantity of the ith heat exchanger according to the obtained second temperature, third temperature and second flow of the position of the ith heat exchanger, and controlling the ith electromagnetic valve 1 to switch for multiple times between two opening states of the ith electromagnetic valve based on the measured heat exchange quantity and the target heat exchange quantity of the ith heat exchanger until the water supply quantity corresponding to the target heat exchange quantity is output to the ith heat exchanger, so that the measured heat exchange quantity of the M heat exchangers is adjusted to the target heat exchange quantity.
In the embodiment, considering that the user has requirements on the heat exchange amount of the heat exchanger in some occasions with higher requirements on the control precision, i.e., the target heat exchange amount, and then, the air conditioning control device may further include M second temperature sensors 4, M third temperature sensors 5, and M second flow meters 3, as shown in fig. 5, then, according to the second temperature, the third temperature and the second flow rate at the location of the ith heat exchanger, the metered heat exchange amount of the ith heat exchanger can be determined, and based on the metered heat exchange amount of the ith heat exchanger and the target heat exchange amount, the ith solenoid valve 1 may be controlled to switch between its two opening states a plurality of times until the water supply amount corresponding to the target heat exchange amount is output to the ith heat exchanger, so that the metering heat exchange amount of the M heat exchangers is adjusted to a target heat exchange amount, wherein the target heat exchange amount can be set according to requirements. Therefore, the control precision of the control logic is higher, the heat exchange performance is enhanced, and the energy can be effectively saved.
As a preferred embodiment, each solenoid valve 1 further includes a plurality of opening states, wherein each opening state has one of the number of opening values between x and 100 and is different from each other;
based on the acquired detection data and target data of the position of the ith heat exchanger, the ith electromagnetic valve 1 is controlled to be switched for many times between two opening states until water supply amount corresponding to the target data is output to the ith heat exchanger, and the method comprises the following steps:
and controlling the ith electromagnetic valve 1 to switch for multiple times among various opening states of the ith electromagnetic valve 1 based on the acquired detection data and target data of the position of the ith heat exchanger until the water supply amount corresponding to the target data is output to the ith heat exchanger.
In the present embodiment, in order to further improve the control accuracy, and in order to meet the control noise requirement of most residential and office central air conditioners, the inventor considers that each solenoid valve 1 may further include a plurality of opening states, each opening state is different from another opening state, and the specific total number of the plurality of opening states included therein is set according to the user's requirement, but it should be ensured that each opening state is different. Then, based on the acquired detection data of the position where the i-th heat exchanger is located and the target data, the i-th solenoid valve 1 may be controlled to switch between its own various opening states a plurality of times to output a pulsating flow until the water supply amount corresponding to the target data is output to the i-th heat exchanger.
It can be seen that, by setting each of the solenoid valves 1 to a plurality of solenoid valves 1 with adjustable opening states, the control accuracy is further improved, and the noise generated when the solenoid valves 1 operate is further reduced to a certain extent.
As a preferred embodiment, the control module 2 includes a solenoid valve controller 21 and M PWM controllers 22;
the input ends of the M PWM controllers 22 are respectively connected with the M first output ends of the electromagnetic valve controllers 21 in a one-to-one correspondence manner, and the output ends of the M PWM controllers 22 are respectively connected with the first control ends of the M electromagnetic valves 1 in a one-to-one correspondence manner; m second output ends of the electromagnetic valve controller 21 are respectively connected with the second control ends of the M electromagnetic valves 1 in a one-to-one correspondence manner;
the solenoid valve controller 21 is configured to, for each water supply cycle, control an opening state of the ith solenoid valve 1 based on the acquired detection data and target data of the position where the ith heat exchanger is located, and control the ith PWM controller 22 to output an opening and closing frequency and a bandwidth in the opening state, so as to control the ith solenoid valve 1 to switch for multiple times between various opening states of the ith solenoid valve 1 until a water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the position where the M heat exchangers are located is adjusted to the target data.
In this embodiment, the control module 2 may include an electromagnetic valve controller 21 and M PWM controllers 22, where the electromagnetic valve controller 21 may output a corresponding first control signal through a second output end of the electromagnetic valve controller 21 to control an opening state of the ith electromagnetic valve 1, and output a corresponding second control signal through a first output end of the electromagnetic valve controller 22 to control an opening and closing frequency and a bandwidth of the ith PWM controller in the opening state, and the opening and closing frequency and the bandwidth may control the ith electromagnetic valve 1 to switch between various opening states of the electromagnetic valve controller 1 for multiple times until a water supply amount corresponding to the target data is output to the ith heat exchanger, so as to adjust detection data of positions of the M heat exchangers to the target data, based on the obtained detection data and target data of the position of the ith heat exchanger. The specific transmission process of the target data acquired here includes, but is not limited to, transmission from an air conditioner controller in a central air conditioner to the electromagnetic valve controller 21, and the specific transmission process of the detection data acquired here includes, but is not limited to, transmission of detection data detected by various detection devices to the electromagnetic valve controller 21, and the present application is not limited thereto.
Specifically, taking as an example that each solenoid valve 1 includes two opening states of 100% full opening and x% minimum opening, and M =3, as shown in fig. 6, fig. 6 shows a flow curve when three solenoid valves 1 all have the same frequency and bandwidth; it can be understood that in practical control, generally, the PWM controllers 22 can output control signals with the same opening and closing frequency but different bandwidths to the solenoid valves 1, but after the full-opening signals of the branches where all the solenoid valves 1 are located are combined, a straight line should be formed to ensure the stability of the flow, as shown in fig. 7; the types of the solenoid valves 1 are not necessarily consistent, different solenoid valves 1 can be selected according to user requirements, and a flow curve of each solenoid valve 1 as shown in fig. 8 can be formed at this time.
Therefore, by the mode, the execution logic of the control module 2 can be accurately and reliably realized, the heat exchange performance is enhanced, and the control purpose can be more accurately achieved.
As a preferred embodiment, a pre-trained control parameter determination model is stored in the controller of the electromagnetic valve 1;
the opening state of the ith electromagnetic valve 1 is controlled based on the acquired detection data and target data of the position of the ith heat exchanger, and the opening and closing frequency and bandwidth in the opening state are output through the ith PWM controller, and the method comprises the following steps:
the acquired detection data and target data of the position of the ith heat exchanger are input into a control parameter determination model, the opening state of the ith electromagnetic valve 1 is controlled according to first opening control data output by the control parameter determination model, and the opening and closing frequency and bandwidth of the opening state are output through the ith PWM controller according to first pulse control data output by the control parameter determination model.
In this embodiment, a pre-trained control parameter determination model may be stored in the controller of the solenoid valve 1, the control parameter determination model is an artificial neural network model based on machine learning, and transfer learning is added, and the first opening control data and the first pulse control data may be output while continuously transfer learning to optimize each parameter in the model itself.
Specifically, in order to train the control parameter determination model in advance, the control parameter determination model is trained through a large amount of experimental calibration and simulation data in the pre-training process to ensure the reliability of the control parameter determination model, so that when the trained control parameter determination model is obtained and is applied specifically, detection data and target data of the position of the ith heat exchanger are input into the control parameter determination model, the opening state of the ith electromagnetic valve 1 is controlled according to first opening control data output by the control parameter determination model, and the opening and closing frequency and bandwidth of the first pulse control data output by the control parameter determination model in the opening state are output through the ith PWM controller, so that the purposes of accurate control and improvement of heat exchange performance are achieved.
As a preferred embodiment, a pre-designed disturbance control algorithm is further stored in the controller of the electromagnetic valve 1;
the opening state of the ith electromagnetic valve 1 is controlled based on the acquired detection data and target data of the position of the ith heat exchanger, and the opening and closing frequency and bandwidth in the opening state are output through the ith PWM controller, and the method comprises the following steps:
the method comprises the steps of inputting acquired detection data and target data of the position of the ith heat exchanger into a control parameter determination model to obtain first opening control data and first pulse control data output by the control parameter determination model, carrying out parameter accurate calibration processing on the first opening control data and the first pulse control data according to a disturbance control algorithm, controlling the opening state of the ith electromagnetic valve 1 based on second opening control data obtained after the parameter accurate calibration processing, and controlling the opening and closing frequency and bandwidth of the ith PWM controller output in the opening state based on second pulse control data obtained after the parameter accurate calibration processing.
In this embodiment, in consideration of some occasions with higher requirements on control accuracy, such as the fields of medical treatment, data centers, national defense, scientific research and the like, in order to further improve the control accuracy, a pre-designed disturbance control algorithm may be stored in the controller of the electromagnetic valve 1.
Specifically, it should be noted that, firstly, in the process of obtaining the first opening control data and the first pulse control data through the control parameter determination model, on one hand, it has been considered that the target data should meet the control requirement, for example, when the target data is the target heat exchange amount, an absolute value of a difference value obtained by subtracting the metered heat exchange amount from the target heat exchange amount should be smaller than an allowable error value of the heat exchange amount; when the target data is the target temperature, the absolute value of the difference value of the target temperature minus the detection temperature is smaller than the temperature allowable error value; on the other hand, it has been considered that the system noise of the central air conditioner should be within the noise requirement range of the place where the central air conditioner is located.
In addition, in order to ensure high control precision, the total heat exchange amount strengthening level of the branch where each heat exchanger is located needs to be maximized, so that parameter accurate calibration processing can be performed on the first opening control data and the first pulse control data according to the disturbance control algorithm, the opening state of the ith electromagnetic valve 1 is controlled based on the second opening control data obtained after the parameter accurate calibration processing, and the opening and closing frequency and bandwidth of the ith PWM controller in the opening state are controlled based on the second pulse control data obtained after the parameter accurate calibration processing. The specific work flow of the parameter precise calibration processing of the disturbance control algorithm may be that the first opening degree control data and the first pulse control data are used as control data, if the control data obtained in the current period is the same as the control data obtained in the previous period, a point (a + da) may be slightly disturbed on the basis of the control data (assumed to be a) obtained in the previous period, and if the reinforcement level of the heat exchanger at this time is increased, the disturbance (a +2 da) is continued in the next period; if the reinforcement level of the heat exchanger decreases, disturbing (a-da) in the opposite direction in the next cycle; if the strengthening level of the heat exchanger is not changed, which means that the optimal operation state is achieved, the next period returns to the original control parameter (a), and the operation is changed until the control data obtained in the current period and the control data obtained in the previous period are changed, and the accurate parameter calibration processing is carried out again.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a central air conditioner according to the present invention, wherein fig. 9 is still described with M =3 as an example.
The central air conditioner comprises a circulating water pump, heat exchangers arranged at M different positions and an air conditioner control device;
the circulating water pump is connected with the air conditioner control device and the M heat exchangers in sequence.
For the description of the central air conditioner provided in the present invention, please refer to the above embodiments of the air conditioner control device, which will not be described herein again.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An air conditioner control device is characterized by being applied to a water system of a central air conditioner, wherein the water system comprises a circulating water pump and heat exchangers arranged at M different positions, M is more than or equal to 1 and is an integer; the air conditioner control device comprises M electromagnetic valves and a control module; each electromagnetic valve comprises two opening states, wherein the two opening states are respectively 100% full opening and x% minimum opening, and x is more than 0 and less than 100;
the first ends of the M electromagnetic valves are connected with the water outlet end of the circulating water pump, the second ends of the M electromagnetic valves are respectively connected with the water inlet ends of the M heat exchangers in a one-to-one correspondence manner, the water outlet ends of the M heat exchangers are connected with the water inlet end of the circulating water pump after being connected, and the control ends of the M electromagnetic valves are connected with the control module;
the control module is used for controlling the ith electromagnetic valve to switch for multiple times between two opening states of the ith electromagnetic valve according to the acquired detection data and target data of the position of the ith heat exchanger in each water supply period until the water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the positions of the M heat exchangers are adjusted to the target data, wherein i is more than or equal to 1 and less than or equal to M, and i is an integer.
2. The air conditioning control apparatus of claim 1, further comprising a water flow stabilizer;
the water outlet ends of the M heat exchangers are connected with the water inlet end of the water flow stabilizer, and the water outlet end of the water flow stabilizer is connected with the water inlet end of the circulating water pump and used for treating the water flow flowing into the water flow stabilizer so that the pressure of the water flow flowing out of the water flow stabilizer is stabilized within a preset water pressure range.
3. The air conditioning control device according to claim 1, characterized by further comprising M first temperature sensors;
the M first temperature sensors are respectively arranged at the positions of the water outlet ends of the M heat exchangers one by one, and the ith first temperature sensor is used for detecting the first temperature of the position of the water outlet end of the ith heat exchanger;
the method for controlling the ith electromagnetic valve to switch for multiple times between two opening states of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger until the water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the positions of the M heat exchangers are adjusted to the target data comprises the following steps:
and controlling the ith electromagnetic valve to switch between two opening states of the ith electromagnetic valve for multiple times based on the acquired first temperature of the position of the ith heat exchanger and the target temperature until the water supply amount corresponding to the target temperature is output to the ith heat exchanger, so that the first temperature of the position of the M heat exchangers is adjusted to the target temperature.
4. The air conditioning control apparatus according to claim 1, characterized in that the air conditioning control apparatus further comprises M first flow meters;
the input end of the ith first flowmeter is connected with the second end of the ith electromagnetic valve, and the output end of the ith first flowmeter is connected with the water inlet end of the ith heat exchanger and is used for detecting the first flow of water flowing into the ith heat exchanger;
the method for controlling the ith electromagnetic valve to switch for multiple times between two opening states of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger until the water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the positions of the M heat exchangers are adjusted to the target data comprises the following steps:
and controlling the first flow and the target flow of the position of the ith heat exchanger based on the acquired first flow and the target flow, and switching the ith electromagnetic valve between two opening states of the ith electromagnetic valve for multiple times until the water supply amount corresponding to the target flow is output to the ith heat exchanger, so that the first flow of the position of the M heat exchangers is adjusted to the target flow.
5. The air conditioning control device according to claim 1, further comprising M second temperature sensors, M third temperature sensors, and M second flow meters;
the input end of the ith second flowmeter is connected with the second end of the ith electromagnetic valve, and the output end of the ith second flowmeter is connected with the water inlet end of the ith heat exchanger and is used for detecting the second flow of water flowing into the ith heat exchanger;
the M second temperature sensors are respectively arranged at the positions of the water inlet ends of the M heat exchangers one by one, and the ith second temperature sensor is used for detecting the second temperature of the position of the water inlet end of the ith heat exchanger;
the M third temperature sensors are respectively arranged at the positions of the water outlet ends of the M heat exchangers one by one, and the ith third temperature sensor is used for detecting the third temperature of the position of the water outlet end of the ith heat exchanger;
the method for controlling the ith electromagnetic valve to switch for multiple times between two opening states of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger until the water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the positions of the M heat exchangers are adjusted to the target data comprises the following steps:
and determining the measured heat exchange amount of the ith heat exchanger according to the obtained second temperature, third temperature and second flow of the position of the ith heat exchanger, and controlling the ith electromagnetic valve to switch between two opening states for multiple times based on the measured heat exchange amount and the target heat exchange amount of the ith heat exchanger until water supply amount corresponding to the target heat exchange amount is output to the ith heat exchanger, so that the measured heat exchange amount of the M heat exchangers is adjusted to the target heat exchange amount.
6. The air-conditioning control apparatus according to any of claims 1 to 5, characterized in that each of the solenoid valves further comprises a plurality of opening states, wherein each of the opening states has an opening value of one of the numbers between x and 100 and is different for each of the opening states;
the method for controlling the ith electromagnetic valve to switch for multiple times between two opening states of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger until the water supply amount corresponding to the target data is output to the ith heat exchanger comprises the following steps:
and controlling the ith electromagnetic valve to switch among various opening states of the ith electromagnetic valve for many times based on the acquired detection data and target data of the position of the ith heat exchanger until the water supply amount corresponding to the target data is output to the ith heat exchanger.
7. The air conditioning control apparatus according to claim 6, wherein the control module includes an electromagnetic valve controller and M PWM controllers;
the input ends of the M PWM controllers are respectively connected with the M first output ends of the electromagnetic valve controllers in a one-to-one correspondence manner, and the output ends of the M PWM controllers are respectively connected with the first control ends of the M electromagnetic valves in a one-to-one correspondence manner; m second output ends of the electromagnetic valve controller are respectively connected with the second control ends of the M electromagnetic valves in a one-to-one correspondence manner;
the electromagnetic valve controller is used for controlling the opening state of the ith electromagnetic valve and controlling the ith PWM controller to output opening and closing frequency and bandwidth in the opening state based on the acquired detection data and target data of the position of the ith heat exchanger in each water supply period so as to control the ith electromagnetic valve to switch for multiple times between various opening states of the ith electromagnetic valve until the water supply amount corresponding to the target data is output to the ith heat exchanger, so that the detection data of the position of the M heat exchangers is adjusted to the target data.
8. The air conditioning control apparatus according to claim 7, wherein a control parameter determination model trained in advance is stored in the solenoid valve controller;
the method comprises the following steps of controlling the opening state of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger, and outputting the opening and closing frequency and bandwidth in the opening state through the ith PWM controller, wherein the method comprises the following steps:
inputting the acquired detection data and target data of the position of the ith heat exchanger to the control parameter determination model, controlling the opening state of the ith electromagnetic valve according to first opening control data output by the control parameter determination model, and outputting the opening and closing frequency and bandwidth of the opening state according to first pulse control data output by the control parameter determination model through the ith PWM controller.
9. The air conditioning control apparatus according to claim 8, wherein a pre-designed disturbance control algorithm is further stored in the solenoid valve controller;
controlling the opening state of the ith electromagnetic valve based on the acquired detection data and target data of the position of the ith heat exchanger, and outputting the opening and closing frequency and bandwidth in the opening state through the ith PWM controller, wherein the opening and closing frequency and bandwidth comprise:
inputting the acquired detection data and target data of the position of the ith heat exchanger into the control parameter determination model to obtain first opening control data and first pulse control data output by the control parameter determination model, performing parameter accurate calibration processing on the first opening control data and the first pulse control data according to the disturbance control algorithm, controlling the opening state of the ith electromagnetic valve based on second opening control data obtained after the parameter accurate calibration processing, and controlling the opening and closing frequency and bandwidth of the ith PWM controller output in the opening state based on second pulse control data obtained after the parameter accurate calibration processing.
10. A central air conditioner, characterized by comprising a circulating water pump, heat exchangers arranged at M different positions, and an air conditioner control device according to any one of claims 1 to 9;
the circulating water pump is sequentially connected with the air conditioner control device and the M heat exchangers.
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Application publication date: 20220603 |