A method and device for determining a branch of a heat exchanger

Abstract

The application discloses a branch determination method and device of a heat exchanger, relates to the technical field of heat exchangers, and is used for reasonably planning the branches of the heat exchanger, so that each heat exchange pipe in the heat exchanger can play the maximum role. The method comprises the following steps: acquiring a first fitting function, the face wind speed of each heat exchange pipe in the heat exchanger, the length of the heat exchange pipe and the arrangement of the heat exchange pipe; determining a plurality of branch types and the corresponding face wind speed ranges of each branch type according to the face wind speed of each heat exchange pipe in the heat exchanger, the first fitting function and the length of the heat exchange pipe, wherein the branch type is used for indicating the number of heat exchange pipes used for composing a branch; and based on the plurality of branch types, the corresponding face wind speed ranges of each branch type, the face wind speed of each heat exchange pipe in the heat exchanger and the arrangement of the heat exchange pipe in the heat exchanger, the heat exchange pipes in the heat exchanger are subjected to branch division, and a plurality of branches in the heat exchanger are determined.

Description

Technical Field

[0001] This application relates to the field of heat exchanger technology, and in particular to a method and apparatus for determining the branch of a heat exchanger. Background Technology

[0002] With the development of air conditioning technology, the number of heat exchange tubes in air conditioners is becoming increasingly large, placing higher demands on the flow path design of the heat exchangers. Improper flow path design will severely limit the performance of the air conditioner, increase the difficulty of heat exchanger production, and reduce the manufacturing efficiency of the heat exchanger.

[0003] Different flow paths in a heat exchanger can have varying impacts on air conditioner performance. Often, a flow path that optimizes cooling performance may result in suboptimal heating performance, or vice versa. Therefore, the design of a heat exchanger's flow path requires careful consideration of the different needs of the air conditioner.

[0004] Therefore, how to rationally plan the flow path of the air conditioner heat exchanger according to the performance requirements of the air conditioner is a problem that needs to be solved. Summary of the Invention

[0005] This application provides a method and apparatus for determining the branch of a heat exchanger, which is used to rationally plan the branch of the heat exchanger so that each heat exchange tube in the heat exchanger can play its maximum role.

[0006] Firstly, a method for determining the branches of a heat exchanger is provided, the method comprising: Obtain the first fitting function, the oncoming wind speed of each heat exchange tube in the heat exchanger, the length of the heat exchange tube, and the arrangement of the heat exchange tube; wherein, the first fitting function is used to characterize the correspondence between the average oncoming wind speed and the branch length when taking into account both the heat exchange efficiency under heating and cooling conditions. Based on the face velocity of each heat exchange tube in the heat exchanger, the first fitting function, and the length of the heat exchange tube, multiple branch types and the face velocity range corresponding to each branch type are determined. The branch type is used to indicate the number of heat exchange tubes used to form a branch. Based on multiple branch types, the oncoming wind speed range corresponding to each branch type, the oncoming wind speed of each heat exchange tube in the heat exchanger, and the arrangement of the heat exchange tubes in the heat exchanger, the heat exchange tubes in the heat exchanger are divided into branches to determine multiple branches in the heat exchanger.

[0007] The technical solution provided in this application provides at least the following beneficial effects: Since the first fitting function can characterize the correspondence between the average face wind speed and the branch length, and the number of heat exchange tubes in a branch must be a positive integer, multiple branch types and the face wind speed range corresponding to each branch type can be determined based on the first fitting function and the length of the heat exchange tubes. Then, based on the face wind speed of each heat exchange tube in the heat exchanger and the arrangement of the heat exchange tubes, multiple branches in the heat exchanger are divided. The branch types determined in this application correspond to the face wind speed of the heat exchange tubes. Different branch types correspond to different heat exchange efficiencies, thereby controlling the number and length of branches in the heat exchanger flow path, avoiding chaotic branch division of the heat exchange tubes, and enabling each branch to play its maximum role without increasing costs, improving the overall performance of the air conditioner, achieving energy saving and emission reduction, reducing the production difficulty of the heat exchanger, and improving manufacturing efficiency.

[0008] In some embodiments, obtaining the first fitting function specifically includes: obtaining a second fitting function and a third fitting function. The second fitting function characterizes the correspondence between the average face wind speed and the branch length with the highest heat exchange efficiency under heating conditions, and the third fitting function characterizes the correspondence between the average face wind speed and the branch length with the highest heat exchange efficiency under cooling conditions. The second and third fitting functions are weighted to obtain the first fitting function. Thus, by considering both the cooling and heating performance of the air conditioner based on the second and third fitting functions and their weighting coefficients, the first fitting function can be determined more accurately. Consequently, when dividing the branches of the heat exchanger, a more reasonable branch division result that fits the actual application scenario can be obtained.

[0009] In some embodiments, the first fitting function satisfies the following relationship: ;in, Denotes the first fitting function. Denotes the second fitting function. Let represent the third fitting function, v represent the average face wind speed, and X represent the weighting coefficient of the second fitting function. This allows for a more accurate acquisition of the first fitting function, leading to more reasonable heat exchanger branching in subsequent configurations.

[0010] In some embodiments, the weighting coefficients of the second fitting function are greater than or equal to 0.4 and less than or equal to 0.6. Thus, when the weighting coefficients of the second fitting function are greater than or equal to 0.4 and less than or equal to 0.6, the first fitting function can be obtained more accurately.

[0011] In some embodiments, multiple branch types and the corresponding oncoming wind speed ranges for each branch type are determined based on a first fitting function and the length of the heat exchange tubes. Specifically, this includes: determining the range of oncoming wind speed values ​​for each heat exchange tube in the heat exchanger based on its oncoming wind speed; determining the range of branch length values ​​based on the range of oncoming wind speed values ​​for the heat exchange tubes and the first fitting function; dividing the branch length range by the length of the heat exchange tubes to obtain multiple length intervals, each length interval corresponding to a branch type; for each branch type, rounding down the ratio between the lower limit of the length interval corresponding to the branch type and the length of the heat exchange tubes to obtain the number of heat exchange tubes constituting a branch as indicated by the branch type; and for each branch type, determining the oncoming wind speed range corresponding to the branch type based on the length interval corresponding to the branch type and the first fitting function. This simplifies the process of obtaining the oncoming wind speed range corresponding to a branch type, reduces computational load, and eliminates the need for excessive time investment in the calculation process, allowing users to more quickly and reasonably divide the branches of the heat exchanger in subsequent processes.

[0012] Secondly, a branch determination device for a heat exchanger is provided, comprising: an acquisition unit, configured to acquire a first fitting function, the oncoming wind speed of each heat exchange tube in the heat exchanger, the length of the heat exchange tube, and the arrangement of the heat exchange tube; wherein, the first fitting function is used to characterize the correspondence between the average oncoming wind speed and the branch length when considering both the heat exchange efficiency under heating and cooling conditions; a processing unit, configured to determine multiple branch types and the oncoming wind speed range corresponding to each branch type based on the oncoming wind speed of each heat exchange tube in the heat exchanger, the first fitting function, and the length of the heat exchange tube, wherein the branch type is used to indicate the number of heat exchange tubes used to form a branch; the processing unit is further configured to divide the heat exchange tubes in the heat exchanger into branches based on the multiple branch types, the oncoming wind speed range corresponding to each branch type, the oncoming wind speed of each heat exchange tube in the heat exchanger, and the arrangement of the heat exchange tubes in the heat exchanger, thereby determining multiple branches in the heat exchanger.

[0013] Thirdly, embodiments of this application provide a computer-readable storage medium storing instructions that, when executed on any of the aforementioned devices, cause the devices to perform the branch determination method for any of the aforementioned heat exchangers.

[0014] Fourthly, embodiments of this application provide a chip, including: a processor and a memory; the memory is used to store computer execution instructions, the processor is connected to the memory, and when the chip is running, the processor executes the computer execution instructions stored in the memory to cause the chip to execute any of the above-described branch determination methods for heat exchangers.

[0015] Fifthly, embodiments of this application provide a computer program product containing instructions that, when run on any of the aforementioned devices, cause the device to execute the branch determination method for any of the aforementioned heat exchangers.

[0016] Furthermore, the technical effects of any of the design methods in aspects two through five can be found in the technical effects of the different design methods in aspect one above, and will not be repeated here. Attached Figure Description

[0017] Figure 1 This application provides a schematic diagram of the branch circuit of a heat exchanger according to an embodiment of the present application. Figure 2 A branch diagram of another heat exchanger provided in the embodiments of this application; Figure 3 A flowchart illustrating a method for determining the branch of a heat exchanger, provided in an embodiment of this application; Figure 4 A schematic diagram of a second fitting function and a third fitting function provided for embodiments of this application; Figure 5 A schematic diagram illustrating the correspondence between the weighting coefficients of a second fitting function and the heating efficiency of an air conditioner, provided for an embodiment of this application. Figure 6 A schematic diagram illustrating the correspondence between the weighting coefficients of a second fitting function and the cooling energy efficiency of an air conditioner, provided in an embodiment of this application. Figure 7 A schematic diagram illustrating the correspondence between the weighting coefficients of a second fitting function and the annual seasonal energy efficiency ratio of an air conditioner, provided for an embodiment of this application; Figure 8 A flowchart illustrating another method for determining the branch of a heat exchanger provided in this application embodiment; Figure 9 A schematic diagram of a first fitting function provided in an embodiment of this application; Figure 10 A schematic diagram of a calculation scenario for a method for determining the branch of a heat exchanger provided in an embodiment of this application; Figure 11 A schematic diagram of the branch determination result of a heat exchanger provided in an embodiment of this application. Figure 1 ; Figure 12 A schematic diagram of the branch determination result of a heat exchanger provided in an embodiment of this application. Figure 2 ; Figure 13 This is a schematic diagram of a branch determination device for a heat exchanger provided in an embodiment of this application. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0021] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0022] To facilitate understanding, we will first provide a brief introduction and explanation of some terms or basic concepts of technology involved in the embodiments of this application.

[0023] The flow path is the path along which the refrigerant flows within the heat exchanger of an air conditioner. There are various different organizational forms of flow paths in a heat exchanger, and different flow paths will have different effects on the performance of the air conditioner.

[0024] The flow path consists of several branches, which are connected into a whole by a branch pipe group and a gas collecting pipe group. Each branch is limited to a heat exchanger section consisting of a liquid pipe and a gas pipe connected to that pipe through several heat exchange tubes. The liquid pipe refers to the connecting pipe between the branch pipe group and the heat exchange tubes, and the gas pipe refers to the connecting pipe between the gas collecting pipe group and the heat exchange tubes. For example, such as... Figure 1As shown, the manifold assembly 101 connects to only one liquid pipe 102, meaning the flow path of this heat exchanger contains only one branch. This branch includes three elbows 103 and four U-shaped heat exchange tubes 104, with the three elbows 103 connecting the four U-shaped heat exchange tubes 104. In this branch, the refrigerant flows into the liquid pipe 102 via the manifold assembly 101, passes through the U-shaped heat exchange tubes 104 and elbows 103, and finally enters the gas collection assembly 106 from the gas pipe 105, completing the heat exchange process in this branch.

[0025] In practical applications, air conditioner heat exchangers typically have two or three rows, with approximately 10-60 U-shaped heat exchange tubes per row. The number of branches in the flow path and the connection relationships between the heat exchange tubes in each branch vary in construction. For example,... Figure 2 As shown in (a), the flow path of the heat exchanger includes a branch consisting of two rows of four U-shaped heat exchange tubes; as Figure 2 As shown in (b), the heat exchanger's flow path contains two branches, each consisting of a row of two U-shaped heat exchange tubes; as shown in (b). Figure 2 As shown in (c), the flow path of the heat exchanger includes a branch consisting of two rows of four U-shaped heat exchange tubes; as... Figure 2 As shown in (d), the flow path of the heat exchanger includes a branch consisting of 3 columns of 6 U-shaped heat exchange tubes.

[0026] As mentioned in the background section, improper flow path design in heat exchangers can severely limit air conditioner performance. The required flow path configuration for the same air conditioner varies significantly depending on the application environment, necessitating a trade-off between different air conditioner requirements. Furthermore, a wide variety of heat exchanger branch types increases manufacturing complexity and reduces air conditioner production efficiency. Therefore, a method for rationally determining heat exchanger branch paths is needed to not only optimize air conditioner performance but also maximize the utilization rate of heat exchange tubes.

[0027] In view of this, this application provides a method for determining the branches of a heat exchanger. Based on the correspondence between the average face velocity and the branch length, as well as the length of the heat exchange tubes, multiple branch types and their corresponding face velocity ranges are determined. Then, based on the multiple branch types, their corresponding face velocity ranges, and the arrangement of the heat exchange tubes, the heat exchange tubes in the heat exchanger are divided into branches, thus determining multiple branches within the heat exchanger. It should be understood that in a heat exchanger, the face velocity of the heat exchange tubes decreases sequentially from top to bottom, and the heat exchange efficiency of the heat exchange tubes also decreases sequentially. In this application, the branch type corresponds to the face velocity of the heat exchange tubes, thus each branch type corresponds to a different heat exchange efficiency. This avoids chaotic branch division of the heat exchange tubes, reduces the production difficulty of the heat exchanger, improves manufacturing efficiency, and allows each branch to play its maximum role.

[0028] The branch determination method for heat exchangers provided in this application embodiment can be executed by a branch determination device for heat exchangers. For example, the branch determination device for heat exchangers can be a server; for another example, the branch determination device for heat exchangers can be an electronic chip with computing functions; for yet another example, the branch determination device for heat exchangers can be a mobile phone, tablet computer, desktop computer, laptop computer, handheld computer, notebook computer, ultra-mobile personal computer (UMPC), netbook, as well as cellular phone, personal digital assistant (PDA), augmented reality (AR) / virtual reality (VR) device, etc.

[0029] Optionally, the branch determination device for the heat exchanger may have a storage function to store the branch division results of the heat exchanger, so that users can easily view the branch division of the heat exchanger in subsequent processes.

[0030] Optionally, the branch determination device for the heat exchanger can also be connected to the Internet, allowing it to download the data required for the branch division process, or to upload the branch division results to the Internet so that other users can view them. This application does not impose any special limitations on the specific form of the branch determination device. The following description uses an electronic device as an example.

[0031] The method for determining the branch of a heat exchanger provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0032] Figure 3 A method for determining the branch of a heat exchanger, provided in an embodiment of this application, includes the following steps: S101, The electronic device acquires the first fitting function, the oncoming wind speed of each heat exchange tube in the heat exchanger, the length of the heat exchange tube, and the arrangement of the heat exchange tube.

[0033] The first fitting function is used to characterize the relationship between the average face wind speed and the branch length when considering both the heat exchange efficiency under heating and cooling conditions.

[0034] In some embodiments, the electronic device can obtain a first fitting function by acquiring a second fitting function and a third fitting function, and then weighting the second and third fitting functions. The second fitting function characterizes the correspondence between the average face wind speed and the branch length with the highest heat exchange efficiency under heating conditions. The third fitting function characterizes the correspondence between the average face wind speed and the branch length with the highest heat exchange efficiency under cooling conditions.

[0035] In some embodiments, the first fitting function satisfies the following relationship with the second and third fitting functions: L(v) = X × H(v) + (1-X) × C(v). Wherein, Denotes the first fitting function. Denotes the second fitting function. Let represent the third fitting function, v represent the average oncoming wind speed, and X represent the weighting coefficient of the second fitting function.

[0036] Preferably, the weight coefficients of the second fitting function are greater than or equal to 0.4 and less than or equal to 0.6.

[0037] In some embodiments, the second and third fitting functions can be obtained experimentally. For example, taking the experimental process of the second fitting function as an example, the oncoming wind speed of the heat exchange tube is first fixed. Under this fixed oncoming wind speed, the branch length is changed to determine the branch length with the highest heat exchange efficiency corresponding to this oncoming wind speed under heating conditions. Through repeated experiments, the second fitting function is finally obtained.

[0038] For example, experiments show that the second fitting function can be expressed as H(v) = -k1 v+b1, the third fitting function can be expressed as C(v=-k2) v + b2. Where 2 ≥ k1 ≥ 0.5, 4 ≥ k2 ≥ 1, 12 ≥ b1 ≥ 8, 24 ≥ b2 ≥ 16.

[0039] It should be understood that the oncoming wind speed of the heat exchange tubes gradually decreases from top to bottom along the height direction of the heat exchanger. Combining the second and third fitting functions obtained from the above experiments, it can be seen that when the oncoming wind speed of the heat exchange tubes is greater, the branch length is smaller. That is, along the height direction of the heat exchanger, the length of the i-th branch from top to bottom is not greater than the length of the (i+1)-th branch.

[0040] Figure 4 An exemplary diagram illustrates the second and third fitting functions in the same coordinate system. (By...) Figure 4It can be seen that the branch length with the highest heat exchange efficiency under the heating condition corresponding to the same oncoming wind speed is much shorter than the branch length with the highest heat exchange efficiency under the cooling condition. Therefore, no matter how the branch length is determined, the heating efficiency and cooling efficiency of the air conditioner cannot reach the highest at the same time.

[0041] Figure 5 An illustrative example shows the correspondence between the weighting coefficients of the second fitting function and the heating efficiency of the air conditioner. Figure 6 An illustrative example shows the correspondence between the weighting coefficients of the second fitting function and the cooling energy efficiency of the air conditioner, combined with... Figure 5 and Figure 6 It can be seen that the larger the weight coefficient of the second fitting function, the higher the heating efficiency of the air conditioner, and the lower the cooling efficiency.

[0042] Currently, the annual performance factor (APF) is used as the evaluation standard for air conditioner energy efficiency in China. It assesses the overall energy efficiency of the air conditioner under both cooling and heating conditions. Through numerous experiments, such as... Figure 7 As shown, when the weight coefficient of the second fitting function is between [0.4, 0.6], the APF of the air conditioner reaches its highest value. When it deviates from this range, the APF of the air conditioner decreases rapidly. Therefore, the preferred value range for the weight coefficient of the second fitting function is [0.4, 0.6].

[0043] S102. The electronic equipment determines multiple branch types and the corresponding frontal wind speed ranges for each branch type based on the frontal wind speed of each heat exchange tube in the heat exchanger, the first fitting function, and the length of the heat exchange tube.

[0044] The branch type indicates the number of heat exchange tubes used to form a branch.

[0045] It should be understood that the number of heat exchange tubes in a branch must be an integer, so the branch length must be a positive integer multiple of the heat exchange tube length. Furthermore, since the oncoming wind speed of the heat exchange tubes has a certain range, the branch length corresponding to the oncoming wind speed of the heat exchange tubes also has a certain range, as can be seen from the first fitting function. Therefore, based on the first fitting function and the length of the heat exchange tubes, the number of branch types can be greatly reduced, achieving the goal of simplifying the branches of the heat exchanger and thus improving the production efficiency of the heat exchanger.

[0046] S103. Based on multiple branch types, the oncoming wind speed range corresponding to each branch type, the oncoming wind speed of each heat exchange tube in the heat exchanger, and the arrangement of the heat exchange tubes in the heat exchanger, the electronic equipment divides the heat exchange tubes in the heat exchanger into branches and determines multiple branches in the heat exchanger.

[0047] Figure 3The technical solution presented offers at least the following advantages: Since the first fitting function can characterize the correspondence between the average face wind speed and the branch length, and the number of heat exchange tubes in a branch must be a positive integer, multiple branch types and the face wind speed range corresponding to each branch type can be determined based on the first fitting function and the length of the heat exchange tubes. Furthermore, based on the face wind speed of each heat exchange tube in the heat exchanger and the arrangement of the heat exchange tubes, multiple branches in the heat exchanger can be divided. The branch types determined in this application correspond to the face wind speed of the heat exchange tubes. Different branch types correspond to different heat exchange efficiencies, thereby controlling the number and length of branches in the heat exchanger flow path, avoiding chaotic branch division of the heat exchange tubes, and enabling each branch to play its maximum role without increasing costs. This improves the overall performance of the air conditioner, achieves energy saving and emission reduction, reduces the production difficulty of the heat exchanger, and improves manufacturing efficiency.

[0048] In some embodiments, such as Figure 8 As shown, step S102 above can be specifically implemented as follows: S1021. Based on the oncoming wind speed of each heat exchange tube in the heat exchanger, the electronic equipment determines the range of values ​​for the oncoming wind speed of the heat exchange tube in the heat exchanger.

[0049] In some embodiments, the face velocity of the heat exchange tube is in the range of [4m / s, 0.3m / s].

[0050] S1022. Based on the range of the oncoming wind speed of the heat exchange tubes in the heat exchanger and the first fitting function, the electronic equipment determines the range of the branch length.

[0051] For example, if the oncoming wind speed of the heat exchange tubes in the heat exchanger is in the range of [0.3, 4], then the branch length corresponding to the average value of the oncoming wind speed in the first fitting function within this range is in the range of [3.2, 13].

[0052] S1023. Electronic equipment divides the range of branch length values ​​based on the length of the heat exchange tube, resulting in multiple length intervals.

[0053] Each length interval corresponds to a branch type.

[0054] For example, assuming the heat exchange tube is 2m long and the branch length range is [3.2, 13], the branch length range can be divided into multiple length intervals based on the length of the heat exchange tube: [3.2, 4), [4, 6), [6, 8), [8, 10), [10, 12), [12, 13].

[0055] S1024. For each branch type, the electronic device rounds down the ratio between the lower limit of the length range corresponding to the branch type and the length of the heat exchange tube to obtain the number of heat exchange tubes constituting a branch as indicated by the branch type.

[0056] For example, assuming the heat exchanger tube length is 2m, the branch with a length interval of [3.2, 4) can only contain one heat exchanger tube. That is, the ratio between the lower limit of the length interval [3.2, 4) (3.2) and the length of the heat exchanger tube is rounded down to 1. Therefore, the branch type corresponding to the length interval [3.2, 4) contains 1 heat exchanger tube. Similarly, the branch type corresponding to the length interval [4, 6) contains 2 heat exchanger tubes; the branch type corresponding to the length interval [6, 8) contains 3 heat exchanger tubes; the branch type corresponding to the length interval [8, 10) contains 4 heat exchanger tubes; the branch type corresponding to the length interval [10, 12) contains 5 heat exchanger tubes; and the branch type corresponding to the length interval [12, 13] contains 6 heat exchanger tubes.

[0057] S1025. For each branch type, the electronic device determines the oncoming wind speed range corresponding to the branch type based on the length interval corresponding to the branch type and the first fitting function.

[0058] For example, assuming the length interval corresponding to the first branch type is [3.2, 4), and according to the first fitting function, the oncoming wind speed range corresponding to the length interval [3.2, 4) is (3, 4], then the oncoming wind speed range corresponding to the first branch type is (3, 4).

[0059] Figure 8 The technical solution described above offers at least the following advantages: By determining the range of face velocity values ​​for the heat exchanger tubes in the heat exchanger, and then combining this with the first fitting function, the range of branch length values ​​can be determined. Dividing this range of branch length values ​​yields length intervals that correspond one-to-one with each branch type. By rounding down the ratio of the length interval corresponding to the branch type to the length of the heat exchanger tube, the number of heat exchanger tubes constituting a branch, as indicated by the branch type, can be obtained. Furthermore, for each branch type, the face velocity range corresponding to that branch type can be determined based on the length interval corresponding to the branch type and the first fitting function. This simplifies the process of obtaining the face velocity range corresponding to the branch type, reduces computational load, and eliminates the need for excessive time investment in the calculation process, allowing users to more quickly and rationally divide the heat exchanger branches in subsequent processes.

[0060] In some embodiments, researchers insert tubes into multiple branches of an electronic device according to a pre-set insertion method. In actual air conditioning products, there are two common insertion methods: one is that all U-shaped heat exchange tubes pass through only the finned tube holes in the same column (all inserted horizontally). In this case, if a branch passes through an odd number of tubes in each column, it needs to "borrow" tubes from adjacent columns to maintain the total number of U-shaped tubes. The other method allows U-shaped heat exchange tubes to span two columns of finned tube holes (partially inserted at an angle), in which case the number of tubes in the same branch is equal.

[0061] The following details the complete process for determining the branch circuits of a heat exchanger: First, the face velocity of each heat exchanger tube was obtained through experiments, as shown in Table 1.

[0062] Table 1

[0063] The second and third fitting functions were obtained experimentally. The second and third fitting functions were then weighted with a weighting coefficient of 0.5 to obtain the first fitting function. The relationship between branch length and the average face wind speed is as follows: Figure 9 As shown. Since the branch length is an integer multiple of the heat exchange tube length, the electronic equipment can determine the three branch types L1, L2, and L3 based on the heat exchange tube length and the first fitting function. The correspondence between these three branch types and the oncoming wind speed range can be shown as follows. Figure 10 As shown.

[0064] Furthermore, based on multiple branch types, the oncoming wind speed range corresponding to each branch type, the oncoming wind speed of each heat exchange tube in the heat exchanger, and the arrangement of the heat exchange tubes in the heat exchanger, the electronic equipment divides the heat exchange tubes in the heat exchanger into branches, and determines multiple branches in the heat exchanger, as shown in Table 2.

[0065] Table 2

[0066] For example, assuming that all U-shaped heat exchange tubes in the heat exchanger are inserted in a flat-insertion manner, the specific forms of branch 1, branch 2, and branch 3 in Table 2 can be as follows: Figure 11 As shown, all U-shaped heat exchange tubes in these three branches pass through the same column of tube holes.

[0067] For example, assuming that the U-shaped heat exchange tubes in the heat exchanger are inserted in a partially oblique manner, the specific forms of branches 1, 2, and 3 in Table 2 can be as follows: Figure 12 As shown, a U-shaped heat exchange tube in branch 2 crosses the tube hole.

[0068] As can be seen, the above mainly describes the solutions provided by the embodiments of this application from a methodological perspective. To achieve the above functions, the embodiments of this application provide corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the modules and algorithm steps of the various examples described in the embodiments disclosed herein, the embodiments of this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention.

[0069] This application embodiment can divide the branch determination device of the heat exchanger into functional modules according to the above method example. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or software functional modules. Optionally, the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0070] like Figure 13 The diagram shown is a structural schematic of a heat exchanger branch determination device 20 provided in an embodiment of this application. This heat exchanger branch determination device 20 is used to divide the branches of a heat exchanger to obtain reasonable branch configurations, reduce the number of branch types, lower the manufacturing difficulty of the heat exchanger, and improve its production efficiency. For example, the heat exchanger branch determination device 20 can be used to perform... Figure 3 or Figure 8 The branch determination method for the heat exchanger shown is illustrated. The branch determination device 20 for the heat exchanger includes an acquisition unit 201 and a processing unit 202.

[0071] The acquisition unit 201 is used to acquire the first fitting function, the oncoming wind speed of each heat exchange tube in the heat exchanger, the length of the heat exchange tube, and the arrangement of the heat exchange tube; wherein, the first fitting function is used to characterize the correspondence between the average oncoming wind speed and the branch length when taking into account both the heat exchange efficiency under heating and cooling conditions.

[0072] The processing unit 202 is used to determine multiple branch types and the corresponding front wind speed range for each branch type based on the front wind speed of each heat exchange tube in the heat exchanger, the first fitting function, and the length of the heat exchange tube. The branch type is used to indicate the number of heat exchange tubes used to form a branch.

[0073] The processing unit 202 is also used to divide the heat exchange tubes in the heat exchanger into branches based on multiple branch types, the oncoming wind speed range corresponding to each branch type, the oncoming wind speed of each heat exchange tube in the heat exchanger, and the arrangement of the heat exchange tubes in the heat exchanger, thereby determining multiple branches in the heat exchanger.

[0074] In some embodiments, the acquisition unit 201 is specifically used to acquire a second fitting function and a third fitting function. The second fitting function characterizes the correspondence between the average face wind speed and the branch length with the highest heat exchange efficiency under heating conditions, while the third fitting function characterizes the correspondence between the average face wind speed and the branch length with the highest heat exchange efficiency under cooling conditions.

[0075] The processing unit 202 is also used to perform weighted processing on the second fitting function and the third fitting function to obtain the first fitting function.

[0076] In some embodiments, the first fitting function satisfies the following relationship: ;in, Denotes the first fitting function. Denotes the second fitting function. Let represent the third fitting function, v represent the average oncoming wind speed, and X represent the weighting coefficient of the second fitting function.

[0077] In some embodiments, the weighting coefficients of the second fitting function are greater than or equal to 0.4 and less than or equal to 0.6.

[0078] In some embodiments, the processing unit 202 is specifically used for: Based on the face velocity of each heat exchange tube in the heat exchanger, determine the range of face velocity values ​​for the heat exchange tubes in the heat exchanger. Based on the range of the face velocity of the heat exchange tubes in the heat exchanger and the first fitting function, the range of the branch length is determined. The branch length range is divided according to the length of the heat exchange tube, resulting in multiple length intervals, each corresponding to a branch type; For each branch type, the ratio between the lower limit of the length range corresponding to the branch type and the length of the heat exchange tube is rounded down to obtain the number of heat exchange tubes that make up a branch as indicated by the branch type. For each branch type, the oncoming wind speed range corresponding to the branch type is determined based on the length interval corresponding to the branch type and the first fitting function.

[0079] This application also provides a computer-readable storage medium including computer-executable instructions that, when run on a computer, cause the computer to execute any of the branch determination methods for heat exchangers provided in the above embodiments.

[0080] This application also provides a computer program product containing computer execution instructions, which, when run on a computer, causes the computer to execute any of the branch determination methods for heat exchangers provided in the above embodiments.

[0081] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer-executable instructions. When these computer-executable instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer-executable instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer-executable instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs).

[0082] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, disclosure, and appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0083] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

[0084] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for determining the branches of a heat exchanger, characterized in that, include: Obtain the first fitting function, the oncoming wind speed of each heat exchange tube in the heat exchanger, the length of the heat exchange tube, and the arrangement of the heat exchange tube; wherein, the first fitting function is used to characterize the correspondence between the average oncoming wind speed and the branch length when taking into account both the heat exchange efficiency under heating and cooling conditions. Based on the face velocity of each heat exchange tube in the heat exchanger, the range of face velocity values ​​is determined, and the corresponding branch length range is determined using the first fitting function; the branch length range is divided by the length of the heat exchange tube to obtain multiple length intervals; for each length interval, a branch type is determined by rounding down the ratio of its lower limit to the length of the heat exchange tube, and the branch type is used to indicate the number of heat exchange tubes used to form a branch; and, based on each length interval and the first fitting function, the range of face velocity corresponding to the branch type is determined. Based on the multiple branch types, the oncoming wind speed range corresponding to each branch type, the oncoming wind speed of each heat exchange tube in the heat exchanger, and the arrangement of the heat exchange tubes in the heat exchanger, the heat exchange tubes in the heat exchanger are divided into branches to determine multiple branches in the heat exchanger.

2. The method according to claim 1, characterized in that, The process of obtaining the first fitting function specifically includes: Obtain a second fitting function and a third fitting function. The second fitting function is used to characterize the correspondence between the average face wind speed and the branch length with the highest heat exchange efficiency under heating conditions. The third fitting function is used to characterize the correspondence between the average face wind speed and the branch length with the highest heat exchange efficiency under cooling conditions. The second fitting function and the third fitting function are weighted to obtain the first fitting function.

3. The method according to claim 2, characterized in that, The first fitting function satisfies the following relationship: ； in, This represents the first fitting function. This represents the second fitting function. Let v represent the third fitting function, v represent the average oncoming wind speed, and X represent the weighting coefficient of the second fitting function.

4. The method according to claim 3, characterized in that, The weight coefficients of the second fitting function are greater than or equal to 0.4 and less than or equal to 0.

6.

5. The method according to any one of claims 1-4, characterized in that, The step of determining multiple branch types and the corresponding oncoming wind speed range for each branch type based on the first fitting function and the length of the heat exchange tube specifically includes: Based on the oncoming wind speed of each heat exchange tube in the heat exchanger, the range of values ​​for the oncoming wind speed of the heat exchange tube in the heat exchanger is determined. Based on the range of the oncoming wind speed of the heat exchange tubes in the heat exchanger and the first fitting function, the range of the branch length is determined. The length range of the branch is divided according to the length of the heat exchange tube to obtain multiple length intervals, and each length interval corresponds to a branch type; For each branch type, the ratio between the lower limit of the length range corresponding to the branch type and the length of the heat exchange tube is rounded down to obtain the number of heat exchange tubes constituting a branch as indicated by the branch type. For each branch type, the oncoming wind speed range corresponding to the branch type is determined based on the length interval corresponding to the branch type and the first fitting function.

6. A branch determination device for a heat exchanger, characterized in that, include: The acquisition unit is used to acquire a first fitting function, the oncoming wind speed of each heat exchange tube in the heat exchanger, the length of the heat exchange tube, and the arrangement of the heat exchange tube; wherein, the first fitting function is used to characterize the correspondence between the average oncoming wind speed and the branch length when taking into account both the heat exchange efficiency under heating and cooling conditions. The processing unit is configured to determine the range of oncoming wind speeds based on the oncoming wind speeds of each heat exchanger tube in the heat exchanger, and to determine the corresponding range of branch lengths using the first fitting function; to divide the range of branch lengths by the length of the heat exchanger tubes to obtain multiple length intervals; for each length interval, to determine a branch type by rounding down the ratio of its lower limit to the length of the heat exchanger tube, wherein the branch type indicates the number of heat exchanger tubes used to form a branch; and to determine the range of oncoming wind speeds corresponding to each branch type based on each length interval and the first fitting function. The processing unit is further configured to divide the heat exchange tubes in the heat exchanger into branches based on the multiple branch types, the oncoming wind speed range corresponding to each branch type, the oncoming wind speed of each heat exchange tube in the heat exchanger, and the arrangement of the heat exchange tubes in the heat exchanger, thereby determining multiple branches in the heat exchanger.

7. The apparatus according to claim 6, characterized in that, The acquisition unit is specifically used to acquire a second fitting function and a third fitting function. The second fitting function is used to characterize the correspondence between the average face wind speed and the branch length with the highest heat exchange efficiency under heating conditions. The third fitting function is used to characterize the correspondence between the average face wind speed and the branch length with the highest heat exchange efficiency under cooling conditions. The processing unit is further configured to perform weighted processing on the second fitting function and the third fitting function to obtain the first fitting function.

8. The apparatus according to claim 7, characterized in that, The first fitting function satisfies the following relationship: ； in, This represents the first fitting function. This represents the second fitting function. Let v represent the third fitting function, v represent the average oncoming wind speed, and X represent the weighting coefficient of the second fitting function.

9. The apparatus according to claim 8, characterized in that, The weight coefficients of the second fitting function are greater than or equal to 0.4 and less than or equal to 0.

6.

10. The apparatus according to any one of claims 6-9, characterized in that, The processing unit is specifically used for: Based on the oncoming wind speed of each heat exchange tube in the heat exchanger, the range of values ​​for the oncoming wind speed of the heat exchange tube in the heat exchanger is determined. Based on the range of the oncoming wind speed of the heat exchange tubes in the heat exchanger and the first fitting function, the range of the branch length is determined. The length range of the branch is divided according to the length of the heat exchange tube to obtain multiple length intervals, and each length interval corresponds to a branch type; For each branch type, the ratio between the lower limit of the length range corresponding to the branch type and the length of the heat exchange tube is rounded down to obtain the number of heat exchange tubes constituting a branch as indicated by the branch type. For each branch type, the oncoming wind speed range corresponding to the branch type is determined based on the length interval corresponding to the branch type and the first fitting function.

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