A method for controlling the temperature of a target area

Abstract

A method for controlling the temperature of a target area, which is applied to a heat exchange system including multiple heat exchange devices. The multiple heat exchange devices are respectively arranged in multiple target areas, and the energy-carrying fluid of the heat exchange system flows through the multiple heat exchange devices in sequence through pipelines; the method includes: obtaining the actual temperature of each target area; determining the preset working temperature of each heat exchange device according to the difference between the actual temperature and the target temperature of each target area; determining the input sequence of the energy-carrying fluid according to the preset working temperature of each heat exchange device; conveying the energy-carrying fluid to the multiple heat exchange devices according to the input sequence of the energy-carrying fluid; after completing the conveying of the energy-carrying fluid, stopping the conveying and maintaining for a period of time. The present invention can independently control the actual temperature of different target areas and can be applied to heating / cooling systems. Compared with the existing heat exchange systems, it has the advantages of independent control of the temperatures of different target areas, high temperature control accuracy, and energy cost savings, etc.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental temperature control and relates to a method for controlling the temperature of a target area. Background Art

[0002] Existing heat exchange systems for environmental temperature control include a heating system and a cooling system. For a heat exchange system applied to the environmental temperature control of multiple independent target areas, multiple heat exchange devices (such as heat exchangers like radiators) of the heat exchange system are usually respectively arranged in multiple target areas to independently adjust the temperature of the target area where they are located. The multiple heat exchange devices are connected in series through pipelines. The energy-carrying fluid of the heat exchange system usually adopts fluids such as high-temperature or low-temperature liquids (such as water) or gases (such as air) as a medium for releasing heat energy for heating or absorbing heat for cooling. The energy-carrying fluid flows through the multiple series-connected heat exchange devices in sequence through the pipelines.

[0003] Taking a single-pipe heating system as an example, it belongs to a typical heat exchange system as described above. The heating water serving as the energy-carrying fluid sequentially passes through the rooms of users on a certain floor and enters the rooms at the same position of another user adjacent to him above and below, and is sequentially transmitted to the end. In a commonly seen heating system in practice, its water supply pipeline passes through from the top floor to the bottom floor of the building; for a building with a relatively high number of floors, it can also be divided into high zones, low zones or more partitions (such as high zones, middle zones and low zones) for independent heating, and each partition forms an independent single-pipe heating system that runs through from top to bottom.

[0004] In a single-pipe heating system, since the hot water temperature drops after passing through the previous household and heating the indoor air through the radiator, when it flows into the next household, the water temperature will continue to drop compared to the initial state. After passing through multiple households, the water temperature will drop even more, resulting in a lower water temperature obtained by the households at the rear end or the end, and the radiator temperature will also be lower, thus unable to ensure that the room temperature reaches the preset temperature. If the initial temperature is increased to raise the room temperature of the households at the rear end or the end, this will lead to an excessively high room temperature for the front-end users and also cause serious waste of heating energy for the front-end users. That is to say, due to the continuous temperature difference between the front-end and rear-end radiators in this heating system, there is always a temperature difference in the actual temperatures of the corresponding rooms and they cannot be made consistent, so it is impossible to make all rooms reach the optimal temperature simultaneously. On the other hand, the temperature of each room in a series-connected heating system cannot be independently adjusted. If the target heating temperature of a specific room needs to be adjusted, the temperatures of all the series-connected rooms in this heating system will be affected. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a method for controlling the temperature of a target area that can independently adjust the temperatures of multiple target areas.

[0006] The present invention adopts the following technical solutions:

[0007] A method for controlling the temperature of a target area, which is applied to a heat exchange system including a plurality of heat exchange devices. Among them, the plurality of heat exchange devices are respectively arranged in a plurality of target areas and are used to independently adjust the temperature of the target area where they are located; the plurality of heat exchange devices are connected in series through pipelines, and the energy-carrying fluid of the heat exchange system flows through the plurality of heat exchange devices in sequence through the pipelines; the method includes the following steps: obtaining the actual temperature of each target area; determining the preset working temperature of each heat exchange device according to the difference between the actual temperature and the target temperature of each target area; determining the input sequence of the energy-carrying fluid according to the preset working temperature of each heat exchange device; wherein, the sequence includes at least two parameters, namely the volume and temperature of the energy-carrying fluid, or includes parameters equivalent to the two parameters; conveying the energy-carrying fluid to the plurality of heat exchange devices according to the input sequence of the energy-carrying fluid; after completing the conveying of the energy-carrying fluid, stop the conveying and maintain for a time T.

[0008] Further, the method for obtaining the actual temperature of each target area is: obtaining the actual temperature of each target area through a temperature sensor arranged in each target area.

[0009] Further, the method for obtaining the actual temperature of each target area is: obtaining the actual temperature of the target area by measuring the difference between the input temperature and the output temperature of the energy-carrying fluid entering the target area.

[0010] Further, the control method is applied to a heat exchange system for heating; the method for determining the preset working temperature of each heat exchange device according to the difference between the actual temperature and the target temperature of each target area is: when the actual temperature is lower than the target temperature, the preset working temperature is higher than the target temperature.

[0011] Further, denote the target temperature of the nth target area as T0n, the actual temperature as Tn, and the preset working temperature as T2n. Then: T2n = Tn + βn(T0n - Tn), where βn is the temperature control coefficient applicable to the nth target area, and the value range is 1 ≤ βn ≤ 5.

[0012] Further, the control method is applied to a heat exchange system for cooling. The method for determining the preset working temperature of each heat exchange device according to the difference between the actual temperature and the target temperature of each target area is: when the actual temperature is higher than the target temperature, the preset working temperature is lower than the target temperature.

[0013] Further, denote the target temperature of the nth target area as T0n, the actual temperature as Tn, and the preset working temperature as T2n. Then: T2n = Tn - βn(Tn - T0n), where βn is the temperature control coefficient applicable to the nth target area, and the value range is 1 ≤ βn ≤ 5.

[0014] Further, the output temperature of the energy-carrying fluid is the same as or close to the preset working temperature.

[0015] Further, the volume parameter of the energy-carrying fluid is a sequence composed of the volumes of the multiple heat exchange devices, or a sequence composed of the sum of the volumes of the multiple heat exchange devices and the pipelines between adjacent heat exchange devices.

[0016] Further, the time T is a fixed value, and the value range is 1 minute to 30 minutes; or, the time T is a variable value, which is determined according to the difference between the input temperature and the output temperature of the energy-carrying fluid entering the target area.

[0017] Beneficial effects: By adopting the method of providing pulsed energy-carrying fluid, the present invention independently provides energy-carrying fluids with different temperatures to the heat exchange devices in different target areas, can independently control the actual temperatures of different target areas, and can be applied to heating / cooling systems. Compared with the existing heat exchange systems, it has the advantages of independent control of the temperatures of different target areas, high temperature control accuracy, and energy cost savings. Description of the Drawings

[0018] Figure 1 is the overall process schematic diagram of the present invention;

[0019] Figure 2 is the structural schematic diagram of the application scenario of the present invention;

[0020] Figure 3 is another structural schematic diagram of the application scenario of the present invention. Detailed Embodiments

[0021] The following combines the attached Figures 1 to 3 , and further illustrates the detailed embodiments of a method for controlling the temperature of a target area according to the present invention. The method for controlling the temperature of a target area according to the present invention is not limited to the descriptions of the following embodiments.

[0022] This embodiment gives a detailed embodiment of a method for controlling the temperature of a target area. The method is applied to a heat exchange system including multiple heat exchange devices. The multiple heat exchange devices are respectively arranged in multiple target areas and are used to independently adjust the temperature of the target area where they are located; the multiple heat exchange devices are connected in series through pipelines, and the energy-carrying fluid of the heat exchange system flows through the multiple heat exchange devices in sequence through the pipelines.

[0023] Specifically, as Figure 2 and Figure 3As shown, there are N target regions, denoted as A1 - AN respectively; a heat exchange device is arranged in each target region (of course, multiple devices can also be arranged, for example, multiple radiators are arranged in a room, but logically, the multiple radiators should be regarded as one heat exchange device), and their volumes are denoted as L1 - LN (this symbol is also used to refer to the heat exchange device at the same time). The flow direction of the energy - carrying fluid is as shown by the arrow, flowing through each heat exchange device in sequence from LN until it flows out after reaching L1; the energy - carrying fluid can be a liquid or gas for heating or cooling (for example, it can be hot water in a radiator heating system or cold air delivered to a room).

[0024] As Figure 1 shown, the method in this embodiment includes the following steps:

[0025] (1) Obtain the actual temperature of each target region.

[0026] Among them, the actual temperature of the target region refers to the real temperature of the target region. For example, in a radiator heating system, it is the real temperature of the air in a room. The real temperature can be expressed by an absolute value, such as 24 degrees Celsius or 75.2 degrees Fahrenheit, or it can be expressed by a relative value, such as the relative value to the target temperature. When the target temperature is 24 degrees Celsius, the real temperature of 18 degrees Celsius can be marked as - 6 degrees Celsius.

[0027] (2) Determine the preset working temperature of each heat exchange device according to the difference between the actual temperature and the target temperature of each target region.

[0028] Among them, the target temperature is the temperature value expected by the user for an independent target region. For example, in a radiator heating system, the user expects the temperature of a room to be 24 degrees Celsius, but the actual temperature of the room is 18 degrees Celsius, and the temperature difference is 6 degrees Celsius. If the room needs to be heated further, the expected working temperature of the heat exchange device at a certain future moment can be determined based on this temperature difference, such as 30 degrees Celsius.

[0029] (3) Determine the input sequence of the energy - carrying fluid according to the preset working temperature of each heat exchange device; among them, the sequence includes at least two parameters, namely the volume and temperature of the energy - carrying fluid, or includes parameters equivalent to the two parameters.

[0030] Among them, the input sequence of the energy-carrying fluid refers to the flow volume and temperature sequence of the energy-carrying fluid input to the heat exchange device. Specifically, in order to achieve independent and precise control of the temperature of each target area, an effective method is to input a certain volume and temperature of energy-carrying fluid to each specific heat exchange device based on the difference between the actual temperature of the target area and the target temperature, and maintain it for a period of time (the sum of the time of inputting the energy-carrying fluid plus the time of maintenance is a cycle), so that the specific heat exchange device exchanges heat with the target area (releases heat or absorbs heat), thereby independently adjusting the temperature of the target area until it reaches or remains at the target temperature. In order to input a certain volume and temperature of energy-carrying fluid to each specific heat exchange device, it is necessary to determine the volume and temperature of the energy-carrying fluid input to the heat exchange device in each cycle. Specifically, if Figure 2 、 Figure 3 As shown, for a system with N independent target areas, the following sequence can be generated for each cycle: {(L1, T31), (L2, T32), ..., (Ln, T3n), ..., (LN, T3N), T}. For the nth independent target area, Ln is the volume of the nth heat exchanger (taking into account the volume of the pipeline, it can also be the volume of the nth heat exchanger plus the volume of its front / rear pipelines), T3n is the input temperature of the energy-carrying fluid corresponding to this volume, and T is the length of time after the energy-carrying fluid input is stopped and the heat exchange device is allowed to continue heat exchange. The temperature can still be expressed in absolute or relative terms.

[0031] Of course, the volume and temperature of the energy-carrying fluid can also be represented by equivalent parameters, such as flow rate instead of volume, flow velocity multiplied by time, temperature difference instead of temperature, and instructions / codes and instructions / codes in a "command / code-value correspondence table" instead of temperature. These methods are all technical solutions that are the same or equivalent to the present solution and should be considered to fall within the scope of protection of the present invention.

[0032] (4) delivering the energy-carrying fluid to the plurality of heat exchange devices according to the input sequence of the energy-carrying fluid.

[0033] Specifically, during each cycle, the energy-carrying fluid is delivered to the multiple heat exchangers according to the sequence described above until each heat exchanger is fully filled with the energy-carrying fluid at the volume and temperature corresponding to the sequence. At this point, the energy-carrying fluid corresponding to (L1, T31) has just reached the heat exchanger in target area A1, and the energy-carrying fluid corresponding to (LN, T3N) has just reached the heat exchanger in target area AN, and similarly for the other heat exchangers.

[0034] Among them, for the control method of the volume parameter, it can be measured or controlled by measuring the product of the flow rate and time of the fluid entering the LN heat exchange device; for the control method of the temperature, the following methods can be used for control: one is as Figure 2 shown, through the water mixing device K3 (such as a muddy water pump; of course, for gaseous energy-carrying fluids, a gas mixing device should be used, and the same applies hereinafter and will not be elaborated), or through the combination of the water inlet device K1, the return water device K2 (such as a flow regulating valve or an electronically controlled flow regulating valve) and the water mixing device K3, adjust the temperature of the fluid actually entering the heat exchange device to reach the preset temperature value in the sequence; the other is as Figure 3 shown, adjust the temperature of the fluid actually entering the heat exchange device through the auxiliary heating (cooling) device K4, and cooperate with the water inlet device K1 and the return water device K2 to adjust the flow volume of the fluid entering the heat exchange device.

[0035] (5) After completing the transportation of the energy-carrying fluid, stop the transportation and maintain the time T.

[0036] Specifically, the completion of the transportation of the energy-carrying fluid means that the energy-carrying fluid in one cycle enters the corresponding heat exchange device according to the sequence correspondence. The one cycle includes two stages, namely the stage of transporting the energy-carrying fluid and the stage of maintaining the time T. At this time, each heat exchange device has been and just filled with the energy-carrying fluid at the preset temperature. During the subsequent maintenance time T in this cycle, the energy-carrying fluid releases or absorbs heat, thereby realizing the temperature adjustment of the target area.

[0037] (6) Repeat the above steps 1-5 to achieve the temperature control of each target area. In each subsequent cycle, the sequence is generated in real time according to the actual temperature of the target area detected and the preset target temperature data, and the temperature of the target area can be independently controlled and accurately controlled.

[0038] It should be noted that the labels of the above steps do not limit the execution order of each step, but only serve as marks to distinguish different steps. Those skilled in the art can understand from this technical solution that several of these steps can be executed simultaneously or in the order required in practice.

[0039] In this embodiment, the method for obtaining the actual temperature of each target area is: obtain the actual temperature of each target area through the temperature sensors arranged in each target area.

[0040] Specifically, temperature sensors can be set in each target area to obtain the actual temperature of the target area, which can be used as the basis for future temperature adjustment. The actual temperature of the target area can be represented by a true value or an absolute value, or by a relative value, or by an instruction / code, etc. These all belong to equivalent technical solutions. The advantage of this method is that it can obtain a very accurate actual temperature, and the disadvantage is that multiple temperature sensors need to be set additionally.

[0041] In this embodiment, the method for obtaining the actual temperature of each target area is as follows: By measuring the difference between the input temperature and the output temperature of the energy-carrying fluid entering the target area, the actual temperature of the target area is obtained.

[0042] To overcome the disadvantage of "needing to set multiple temperature sensors additionally" described in the above method, this embodiment also provides a better method for obtaining the actual temperature of each target area. Specifically, the difference between the input temperature and the output temperature of the energy-carrying fluid entering the target area can be used to indicate the difference between the actual temperature and the target temperature of the target area. This is because the greater the difference between the actual temperature and the target temperature of the target area, the greater the heat transfer amount of the heat exchange device in each cycle, and the greater the difference between the input temperature and the output temperature of the energy-carrying fluid. The two are positively correlated. Therefore, by detecting the difference between the input temperature and the output temperature of the energy-carrying fluid entering the target area, the actual temperature state of the target area can be characterized. The actual temperature can be a proportional relationship or a curve relationship with the difference between the input temperature and the output temperature of the fluid, or it can be the actual temperature or approximate actual temperature obtained by converting the proportional relationship or curve relationship into an actual temperature difference according to an empirical formula and then superimposing it with the target temperature. The advantage of this method is that there is no need to install temperature sensors in each target area, and only two temperature sensors at the fluid input and output are required to obtain the actual temperature (or approximate actual temperature) of each target area.

[0043] In this embodiment, the control method is applied to a heating heat exchange system; the method for determining the preset working temperature of each heat exchange device according to the difference between the actual temperature and the target temperature of each target area is as follows: When the actual temperature is lower than the target temperature, the preset working temperature is higher than the target temperature.

[0044] Specifically, in a heating system, when the actual temperature is lower than the target temperature, it means that the actual temperature of the target area is too low and the area needs to be heated. Therefore, the preset working temperature of the heat exchange device should be adjusted higher than the target temperature to achieve rapid heating.

[0045] In this embodiment, the simplest method for determining the preset working temperature based on a proportional relationship is given as follows:

[0046] Let the target temperature of the nth target area be T0n, the actual temperature be Tn, and the preset working temperature be T2n. Then: T2n = Tn + βn(T0n - Tn), where βn is the temperature control coefficient applicable to the nth target area, and the value range is 1 ≤ βn ≤ 5. When the value of βn is large, rapid temperature increase can be achieved, but overshoot is likely to occur; when the value of βn is small (close to 1), the temperature control is only stable, but it may not be possible to achieve precise control; for different target areas, the value of βn can be the same or different.

[0047] Preferably, for the temperature control requirements of each independent target area, it can be regarded as an independent heat exchange system with only one heat dissipation device. Therefore, more existing technical methods can be used to achieve precise control of the temperature in the target area. For example, the values of the target temperature T0n, the actual temperature Tn, and the preset working temperature T2n in several cycles before this cycle can be recorded, and the PID method or a method based on statistics or AI can be used to determine the value of the preset working temperature T2n in the next cycle.

[0048] In this embodiment, the control method is applied to a heat exchange system for cooling. The method for determining the preset working temperature of each heat exchange device according to the difference between the actual temperature and the target temperature of each target area is: when the actual temperature is higher than the target temperature, the preset working temperature is lower than the target temperature.

[0049] Specifically, in a cooling system, when the actual temperature is higher than the target temperature, it means that the actual temperature in the target area is too high and the area needs to be cooled. Therefore, the preset working temperature of the heat exchange device should be lowered to be lower than the target temperature to achieve rapid cooling.

[0050] In this embodiment, a simplest method for determining the preset working temperature based on a proportional relationship is given as follows:

[0051] Let the target temperature of the nth target area be T0n, the actual temperature be Tn, and the preset working temperature be T2n. Then: T2n = Tn - βn(Tn - T0n), where βn is the temperature control coefficient applicable to the nth target area, and the value range is 1 ≤ βn ≤ 5. When the value of βn is large, rapid cooling can be achieved, but overshoot is likely to occur; when the value of βn is small (close to 1), the temperature control is only stable, but it may not be possible to achieve precise control; for different target areas, the value of βn can be the same or different.

[0052] For the temperature control requirements of each independent target area, it can be regarded as an independent heat exchange system with only one heat dissipation device. Therefore, more existing technical methods can be used to achieve precise control of the temperature in the target area. For example, the target temperature T0n, the actual temperature Tn, and the preset working temperature T2n values of several cycles before this cycle can be recorded, and the PID method or methods based on statistics or AI can be used to determine the value of the preset working temperature T2n in the next cycle.

[0053] In this embodiment, the output temperature of the energy-carrying fluid is the same as or close to the preset working temperature.

[0054] Specifically, the output temperature of the energy-carrying fluid can be the same as the preset working temperature. However, considering the energy loss (heat dissipation or heat absorption) of the energy-carrying fluid during the flow process, the output temperature of the energy-carrying fluid can be appropriately adjusted. For example, for a heating system, the output temperature of the energy-carrying fluid is 1 to 5 degrees Celsius higher than the preset working temperature (that is, the output temperature of the energy-carrying fluid is "close" to the preset working temperature as described above), so as to make up for the heat loss.

[0055] In this embodiment, the volume parameter of the energy-carrying fluid is a sequence composed of the volumes of the multiple heat exchange devices, or a sequence composed of the sum of the volumes of the multiple heat exchange devices and the pipes between adjacent heat exchange devices.

[0056] In order to achieve precise control of the energy-carrying fluid in the volume of each heat exchange device, when calculating the volume of the energy-carrying fluid, not only the volume of the heat exchange device but also the volume of the pipe should be considered. As a method of obtaining in actual use, it can be obtained through the preset parameters of the heat exchange device and the pipe. For example, it is obtained by summing the volume parameter of a radiator, the diameter parameter and the length of the pipe. As a better method, for the scenario where the volumes of multiple heat exchange devices are the same, the volume parameter can also be obtained by on-site measurement by releasing pulsed energy-carrying fluid to the heat exchange device. The specific method is as follows: (1) Input a pulsed energy-carrying fluid with a high temperature or a low temperature to the heat exchange device, and the pulse can be a step value or a burst pulse value; (2) Continue to input the energy-carrying fluid and record the volume of the input energy-carrying fluid; (3) Detect the temperature of the fluid output from the heat exchange device until the pulsed energy-carrying fluid is detected (detecting by using the temperature), and obtain the total volume of the energy-carrying fluid flowing through this stage; (4) Divide the total volume of the energy-carrying fluid by the number of heat exchange devices, which is the volume of each heat exchange device plus the corresponding pipe.

[0057] In this embodiment, the time T can be a fixed value (the values of time T in multiple cycles are the same), for example, the value range is 1 minute - 30 minutes, and the heat dissipation device performs heat exchange (releasing heat or absorbing heat) in the target area during this time period.

[0058] As a better method, the time T is a variable value (the values of the time T in multiple cycles are different), and is determined according to the difference between the input temperature and the output temperature of the energy-carrying fluid entering the target area. For example, the greater the difference in unit temperature per unit time in the previous cycle (the difference between the input and output temperatures in the previous cycle divided by the total heat exchange duration T in the previous cycle), it indicates that the difference between the target temperature and the preset temperature is greater. Then, the duration of each cycle (including the time for the energy-carrying device to output and the heat exchange time T) should be shortened, or the output temperature of the energy-carrying fluid should be further adjusted appropriately. For example, for a heating system, the output temperature of the energy-carrying fluid is further increased, thereby further increasing the heat exchange rate of the heat exchange device.

[0059] A method for controlling the temperature of a target area in the present invention can independently control the actual temperatures of different target areas by providing pulsed energy-carrying fluids to the heat exchange devices in different target areas, and can be applied to heating / cooling systems. When the different target areas have different positions and heat energy requirements, they can be adjusted and controlled to the same temperature or independently controlled to different temperatures. Compared with the existing heat exchange systems, it has the advantages of independently controllable temperatures of different target areas, high temperature control accuracy, and energy cost savings.

[0060] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A method for controlling the temperature of a target area, which is applied to a heat exchange system including a plurality of heat exchange devices, wherein, The multiple heat exchange devices are respectively arranged in multiple target areas and are used to independently adjust the temperature of the target area where they are located; the multiple heat exchange devices are arranged in series through pipelines, and the energy-carrying fluid of the heat exchange system flows through the multiple heat exchange devices in sequence through the pipelines; it is characterized in that: the method includes the following steps: Obtain the actual temperature of each target area; Determine the preset working temperature of each heat exchange device according to the difference between the actual temperature and the target temperature of each target area; Determine the input sequence of the energy-carrying fluid according to the preset working temperature of each heat exchange device; wherein, the sequence includes at least two parameters of the volume and temperature of the energy-carrying fluid, or includes parameters equivalent to the two parameters; Transport the energy-carrying fluid to the multiple heat exchange devices according to the input sequence of the energy-carrying fluid; After completing the transportation of the energy-carrying fluid, stop the transportation and maintain for a time T.

2. The target area temperature control method according to claim 1, characterized in that: The method for obtaining the actual temperature of each target area is: Obtain the actual temperature of each target area through the temperature sensors arranged in each target area.

3. The target area temperature control method according to claim 1, characterized in that: The method for obtaining the actual temperature of each target area is: Obtain the actual temperature of the target area by measuring the difference between the input temperature and the output temperature of the energy-carrying fluid entering the target area.

4. The target area temperature control method according to claim 1, characterized in that: The control method is applied to the heat exchange system for heating; the method for determining the preset working temperature of each heat exchange device according to the difference between the actual temperature and the target temperature of each target area is: When the actual temperature is lower than the target temperature, the preset working temperature is higher than the target temperature.

5. The target area temperature control method according to claim 4, characterized in that: Denote the target temperature of the nth target area as T0n, the actual temperature as Tn, and the preset working temperature as T2n, then: T2n = Tn + βn(T0n - Tn), where, βn is the temperature control coefficient applicable to the nth target area, and the value range is 1 ≤ βn ≤ 5.

6. The method for controlling the temperature of the target area according to claim 1, characterized in that: The control method is applied to the heat exchange system for cooling, and the method for determining the preset working temperature of each heat exchange device according to the difference between the actual temperature and the target temperature of each target area is: When the actual temperature is higher than the target temperature, the preset working temperature is lower than the target temperature.

7. The target area temperature control method according to claim 6, characterized in that: Denote the target temperature of the nth target area as T0n, the actual temperature as Tn, and the preset working temperature as T2n, then: T2n = Tn - βn(Tn - T0n), where, βn is the temperature control coefficient applicable to the nth target area, and the value range is 1 ≤ βn ≤ 5.

8. The target area temperature control method according to claim 1, wherein: The output temperature of the energy-carrying fluid is the same as or close to the preset working temperature.

9. The target area temperature control method according to claim 1, wherein: The volume parameter of the energy-carrying fluid is a sequence composed of the volumes of the multiple heat exchange devices, or a sequence composed of the sum of the volumes of the multiple heat exchange devices and the pipelines between adjacent heat exchange devices.

10. According to the method for controlling the temperature of the target area according to claim 1, it is characterized in that: The time T is a fixed value, and the value range is 1 minute - 30 minutes; or, The time T is a variable value and is determined according to the difference between the input temperature and the output temperature of the energy-carrying fluid entering the target area.

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