Electronic expansion valve superheat control method, device and central air conditioning

Abstract

This application discloses an electronic expansion valve superheat control method, device, and central air conditioning system, relating to the field of air conditioning and refrigeration technology. The electronic expansion valve superheat control method includes: acquiring the outdoor ambient temperature, the indoor unit outlet temperature, and the indoor ambient temperature; determining the initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model; the superheat setting model defining the relationship between the outdoor ambient temperature and the initial superheat; and correcting the initial superheat based on the temperature deviation between the indoor ambient temperature and the indoor unit outlet temperature to determine the target superheat of the electronic expansion valve. Therefore, a novel scheme for determining the target superheat is proposed, utilizing the temperature deviation between the indoor ambient temperature and the indoor unit outlet temperature for correction, which can accurately match the actual indoor cooling load demand and effectively ensure the air conditioning comfort experience for indoor users.

Description

Technical Field

[0001] This application relates to the field of air conditioning and refrigeration technology, and in particular to an electronic expansion valve superheat control method, device, central air conditioning system, and computer-readable storage medium. Background Technology

[0002] With the increasing popularity of central air conditioning in commercial spaces such as office buildings, hotels, and shops, research and development of central air conditioning units is very active. A central air conditioning unit is a type of split-type air conditioner that connects multiple indoor units to one outdoor unit.

[0003] When a split-type air conditioner is cooling, the indoor unit regulates the refrigerant flow by using an electronic expansion valve controlled by superheat. Superheat refers to the temperature difference between the outlet and inlet pipe temperatures of the evaporator. However, during air conditioner operation, there may be discrepancies between the measured inlet and outlet pipe temperatures. Currently, the methods for controlling refrigerant flow are relatively simple and cannot accurately match the indoor load demand, affecting the user experience.

[0004] Currently, the industry has not proposed a better technical solution to the above problems. Summary of the Invention

[0005] This application provides an electronic expansion valve superheat control method, device, central air conditioner, and computer-readable storage medium to at least solve the shortcomings of the prior art where the refrigerant flow control index of the air conditioner is singular and cannot match the actual load demand of the room.

[0006] This application provides a method for controlling the superheat of an electronic expansion valve. The method includes: acquiring an outdoor ambient temperature, an indoor unit outlet temperature, and an indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment where the outdoor unit of the air conditioner is located, and the indoor ambient temperature is the temperature of the environment where the indoor unit of the air conditioner is located, wherein the indoor unit includes an electronic expansion valve; determining an initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat; and correcting the initial superheat according to the temperature deviation between the indoor ambient temperature and the indoor unit outlet temperature to determine the target superheat of the electronic expansion valve.

[0007] According to the superheat control method of an electronic expansion valve provided in this application, the superheat setting model includes a first model module and a second model module. The step of determining the initial superheat corresponding to the outdoor ambient temperature based on the preset superheat setting model includes: detecting whether the outdoor ambient temperature exceeds a preset temperature threshold; if the outdoor ambient temperature does not exceed the temperature threshold, determining the initial superheat corresponding to the outdoor ambient temperature based on the first model module; the first model module defines the relationship between the outdoor ambient temperature and the initial superheat; if the outdoor ambient temperature exceeds the temperature threshold, determining the initial superheat corresponding to the outdoor ambient temperature and the indoor ambient temperature based on the second model module; the second model module defines the relationship between the outdoor ambient temperature, the indoor ambient temperature, and the initial superheat.

[0008] According to the superheat control method of the electronic expansion valve provided in this application, the step of correcting the initial superheat based on the temperature deviation between the indoor ambient temperature and the indoor unit air outlet temperature to determine the target superheat of the electronic expansion valve includes: acquiring the indoor ambient humidity; and, if it is determined that the indoor ambient humidity does not exceed a preset humidity threshold, correcting the initial superheat based on the temperature deviation between the indoor ambient temperature and the indoor unit air outlet temperature to determine a first target superheat of the electronic expansion valve, wherein the first target superheat indicates that the outlet pipe temperature of the evaporator is less than or equal to the inlet pipe temperature of the evaporator.

[0009] According to the electronic expansion valve superheat control method provided in this application, after obtaining the indoor ambient humidity, the method further includes: when it is determined that the indoor ambient humidity exceeds the humidity threshold, correcting the initial superheat based on the indoor ambient humidity to determine a second target superheat of the electronic expansion valve, wherein the second target superheat indicates that the outlet pipe temperature of the refrigeration evaporator is greater than the inlet pipe temperature of the refrigeration evaporator.

[0010] According to the superheat control method of the electronic expansion valve provided in this application, the step of correcting the initial superheat based on the indoor ambient humidity to determine the target superheat of the electronic expansion valve includes: determining the target superheat corresponding to the initial superheat based on the superheat update relationship corresponding to the indoor ambient humidity; the superheat update relationship defines the relationship between the initial superheat and the target superheat.

[0011] According to the electronic expansion valve superheat control method provided in this application, the setting operation of the humidity threshold includes: obtaining a user setting instruction, the user setting instruction including a user preferred humidity; and determining the humidity threshold based on the user preferred humidity.

[0012] According to the superheat control method of an electronic expansion valve provided in this application, the step of correcting the initial superheat based on the temperature deviation between the indoor ambient temperature and the indoor unit air outlet temperature to determine the target superheat of the electronic expansion valve includes: determining a target value range that matches the temperature deviation value from a plurality of preset value ranges; determining a target superheat correction relationship that matches the initial superheat from a plurality of preset superheat correction relationships; each superheat correction relationship has a corresponding initial superheat, and the superheat correction relationship includes a plurality of preset value ranges and a corresponding target superheat; and determining the target superheat corresponding to the target value range based on the target superheat correction relationship.

[0013] According to the superheat control method of the electronic expansion valve provided in this application, the step of correcting the initial superheat based on the temperature deviation between the indoor ambient temperature and the indoor unit air outlet temperature to determine the target superheat of the electronic expansion valve includes: correcting the initial superheat based on the temperature deviation between the indoor ambient temperature and the indoor unit air outlet temperature to determine a corresponding first superheat; acquiring air conditioner airflow setting information and determining a corresponding second superheat based on the air conditioner airflow setting information; and determining the target superheat of the electronic expansion valve based on the first superheat and the second superheat.

[0014] This application also provides an electronic expansion valve superheat control device, the device comprising: an acquisition unit configured to acquire an outdoor ambient temperature, an indoor unit outlet temperature, and an indoor ambient temperature; wherein the outdoor ambient temperature is the temperature of the environment where the outdoor unit of the air conditioner is located, and the indoor ambient temperature is the temperature of the environment where the indoor unit of the air conditioner is located, and the indoor unit includes an electronic expansion valve; a determination unit configured to determine an initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model; wherein the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat; and a correction unit configured to correct the initial superheat based on the temperature deviation between the indoor ambient temperature and the indoor unit outlet temperature, thereby determining the target superheat of the electronic expansion valve.

[0015] This application also provides a central air conditioning system, including: an outdoor unit; and an indoor unit comprising an electronic expansion valve and a controller; wherein the controller is used to perform the electronic expansion valve superheat control method as described above.

[0016] This application also provides an air conditioner, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the electronic expansion valve superheat control method as described above through the computer program.

[0017] This application also provides a computer-readable storage medium comprising a stored program, wherein the program, when executed, implements the electronic expansion valve superheat control method as described above.

[0018] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the electronic expansion valve superheat control method as described above.

[0019] The electronic expansion valve superheat control method, device, and central air conditioning system provided in this application collect outdoor ambient temperature, indoor unit outlet temperature, and indoor ambient temperature data. Based on a superheat setting model, the initial superheat of the outdoor ambient temperature is determined, and correction is performed using the temperature deviation between the indoor ambient temperature and the indoor unit outlet temperature. This quantitatively assesses the actual indoor cooling load demand. Therefore, a novel scheme for determining the target superheat is proposed. By correcting the superheat, the actual indoor cooling load demand is accurately matched, avoiding large fluctuations in indoor ambient temperature and effectively ensuring the air conditioning comfort experience for indoor users. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the hardware environment for an electronic expansion valve superheat control method according to an embodiment of this application;

[0023] Figure 2 A structural block diagram of an example air conditioner suitable for applying the electronic expansion valve superheat control method according to embodiments of this application is shown;

[0024] Figure 3 A flowchart illustrating an example of an electronic expansion valve superheat control method according to an embodiment of this application is shown.

[0025] Figure 4 It shows according to Figure 3 An example operation flowchart of step S320 in the process;

[0026] Figure 5 It shows according to Figure 3An example operation flowchart of step S330 in the process;

[0027] Figure 6 A flowchart illustrating an example of an electronic expansion valve superheat control method according to an embodiment of this application is shown.

[0028] Figure 7 A flowchart illustrating an example of an electronic expansion valve superheat control method according to an embodiment of this application is shown.

[0029] Figure 8 A structural block diagram of an example of an electronic expansion valve superheat control device according to an embodiment of this application is shown;

[0030] Figure 9 A structural block diagram of an example central air conditioning system according to an embodiment of this application is shown;

[0031] Figure 10 This is a structural schematic diagram of the air conditioner provided in this application. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] According to one aspect of the embodiments of this application, a method for controlling the overheat of an electronic expansion valve is provided. This method is widely used in whole-house intelligent digital control application scenarios such as smart homes, smart home ecosystems, and intelligence house ecosystems. Optionally, in this embodiment, the above-mentioned method for controlling the overheat of an electronic expansion valve can be applied to, for example... Figure 1 The hardware environment shown consists of terminal device 102 (e.g., air conditioner) and server 104. Figure 1 As shown, server 104 is connected to terminal device 102 via a network and can be used to provide services (such as application services) to the terminal or clients installed on the terminal. A database can be set up on the server or independently of the server to provide data storage services for server 104. Cloud computing and / or edge computing services can be configured on the server or independently of the server to provide data processing services for server 104.

[0035] The aforementioned networks may include, but are not limited to, at least one of the following: wired network, wireless network. The aforementioned wired network may include, but is not limited to, at least one of the following: wide area network, metropolitan area network, local area network. The aforementioned wireless network may include, but is not limited to, at least one of the following: Wi-Fi (Wireless Fidelity), Bluetooth.

[0036] Figure 2 A structural block diagram of an example air conditioner suitable for applying the electronic expansion valve superheat control method of the embodiments of this application is shown.

[0037] like Figure 2 As shown, the air conditioner includes an indoor unit 210 and an outdoor unit 220. In a multi-split air conditioner, one outdoor unit 220 can be connected to multiple indoor units via piping. An evaporator 211 is installed in the indoor unit 210 to perform heat dissipation and cooling operations on the refrigerant fluid. Temperature sensors 213 and 212 are respectively installed at the inlet and outlet of the evaporator 211. For example, the temperature measured by temperature sensor 212 is TC1, and the temperature measured by temperature sensor 213 is TC2. The corresponding superheat SH = TC1 - TC2. The electronic expansion valve 214 adjusts the valve opening according to the superheat SH to control the refrigerant flow rate of the indoor unit.

[0038] Figure 3A flowchart illustrating an example of an electronic expansion valve superheat control method according to an embodiment of this application is shown. The implementing entity of the method in this application embodiment can be various processors or controllers with processing or computing capabilities, and can be installed in an air conditioning terminal, such as an indoor unit. Through local data processing, and also by integrating data communication with a server, the goal of regulating the superheat of the electronic expansion valve in the indoor unit can be achieved, ensuring that the refrigerant flow control matches the actual indoor load demand, and effectively guaranteeing the air conditioning comfort experience of indoor users.

[0039] like Figure 3 As shown, in step S310, the outdoor ambient temperature, the indoor unit air outlet temperature, and the indoor ambient temperature are obtained.

[0040] Here, the outdoor ambient temperature refers to the temperature of the environment where the outdoor unit of the air conditioner is located, for example, by deploying a temperature sensor in the outdoor environment of the outdoor unit to collect the outdoor ambient temperature. The indoor ambient temperature refers to the temperature of the environment where the indoor unit of the air conditioner is located, for example, by deploying a temperature sensor in the outdoor environment of the indoor unit to collect the indoor ambient temperature. The indoor unit air outlet temperature refers to the temperature of the air outlet of the indoor unit, for example, by deploying a temperature sensor at the air outlet of the indoor unit to collect the air outlet temperature.

[0041] In step S320, based on a preset superheat setting model, the initial superheat corresponding to the outdoor ambient temperature is determined. The superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat.

[0042] In some examples of embodiments of this application, multiple outdoor ambient temperatures and corresponding pre-designed initial superheat are pre-statistically calculated, and linear or nonlinear relationship calibration is performed to obtain a superheat setting model. Then, based on the superheat setting model, the acquired outdoor ambient temperatures are queried and matched to obtain the corresponding initial superheat.

[0043] In step S330, the initial superheat is corrected based on the temperature deviation between the indoor ambient temperature and the indoor unit's air outlet temperature to determine the target superheat of the electronic expansion valve.

[0044] In one example of this application's embodiments, there is a positive correlation between the correction amount for the initial superheat and the temperature deviation value; that is, the larger the temperature deviation value, the larger the corresponding correction amount for the initial superheat. In another example of this application's embodiments, a new target superheat is determined based on the temperature deviation value and the initial superheat, for example, through table lookup or model calculation.

[0045] Through the embodiments of this application, the temperature deviation between the indoor ambient temperature and the indoor unit's air outlet temperature can be used to quantify the current indoor load demand, thereby correcting the initial superheat and accurately matching the actual indoor load demand. This avoids large fluctuations in indoor ambient temperature and effectively ensures the air conditioning comfort experience for indoor users.

[0046] Figure 4 It shows according to Figure 3 An example operation flowchart for step S320 in the process.

[0047] like Figure 4 As shown, in step S410, it is detected whether the outdoor ambient temperature exceeds a preset temperature threshold.

[0048] In step S421, if the outdoor ambient temperature does not exceed the temperature threshold, the first model module in the superheat setting model determines the initial superheat corresponding to the outdoor ambient temperature. The first model module defines the relationship between the outdoor ambient temperature and the initial superheat.

[0049] In step S423, if the outdoor ambient temperature exceeds the temperature threshold, the initial superheat corresponding to the outdoor ambient temperature and the indoor ambient temperature is determined based on the second model module in the superheat setting model. The second model module defines the relationship between the outdoor ambient temperature, the indoor ambient temperature and the initial superheat.

[0050] In this embodiment, the outdoor ambient temperature is compared with a temperature threshold. If the outdoor ambient temperature is relatively high, the cooling effect of the air conditioner may be affected to some extent. Therefore, it is necessary to comprehensively consider both the outdoor and indoor ambient temperatures and obtain a matching initial superheat by querying a predefined relationship. Conversely, if the outdoor ambient temperature is relatively low, the cooling effect of the air conditioner is generally better. There is no need for a secondary determination based on the indoor ambient temperature; the matching initial superheat is obtained by querying a predefined relationship, thus improving the efficiency of setting the initial superheat.

[0051] Figure 5 It shows according to Figure 3 An example operation flowchart for step S330 in the process.

[0052] In step S510, the initial superheat is corrected based on the temperature deviation between the indoor ambient temperature and the indoor unit's air outlet temperature to determine the corresponding first superheat.

[0053] In step S520, the air conditioner airflow setting information is obtained, and the corresponding second superheat is determined based on the air conditioner airflow setting information.

[0054] Specifically, the superheat level is determined based on the airflow of the air conditioner. For example, the superheat level corresponding to strong airflow is "3", medium airflow is "2", and weak airflow is "1".

[0055] In step S530, the target superheat of the electronic expansion valve is determined based on the first superheat and the second superheat.

[0056] In one example of this application's embodiments, the target superheat is determined based on the average of the first superheat and the second superheat. In another example of this application's embodiments, the first superheat and the second superheat are weighted and calculated according to a preset weight setting to obtain the corresponding target superheat.

[0057] By comprehensively considering the superheat values ​​determined by various superheat algorithms through the embodiments of this application, the final target superheat value can be applied to more types of air conditioning usage scenarios.

[0058] Figure 6 A flowchart illustrating an example of an electronic expansion valve superheat control method according to an embodiment of this application is shown.

[0059] like Figure 6 As shown, in step S610, the outdoor ambient temperature, the indoor unit air outlet temperature, the indoor ambient humidity, and the indoor ambient temperature are obtained.

[0060] For example, data communication is conducted with a humidity sensor located in the environment where the indoor unit is situated to collect the corresponding indoor humidity.

[0061] In step S620, the initial superheat corresponding to the outdoor ambient temperature is determined based on a preset superheat setting model.

[0062] In step S630, it is detected whether the indoor ambient humidity exceeds a preset humidity threshold.

[0063] In step S641, if the indoor ambient humidity does not exceed a preset humidity threshold, the initial superheat is corrected based on the temperature deviation between the indoor ambient temperature and the indoor unit's air outlet temperature to determine the first target superheat of the electronic expansion valve. At this time, the first target superheat should be negative or zero, meaning the outlet pipe temperature of the evaporator is less than or equal to the inlet pipe temperature of the evaporator, so as to further improve the cooling effect of the air conditioner using superheat correction.

[0064] In some implementations, a target value range matching the temperature deviation value is determined from a plurality of preset value ranges. Then, a target superheat correction relationship matching the initial superheat is determined from a plurality of preset superheat correction relationships, each superheat correction relationship having a corresponding initial superheat, and the superheat correction relationship including a plurality of preset value ranges and a corresponding target superheat. Furthermore, based on the target superheat correction relationship, a target superheat corresponding to the target value range is determined.

[0065] In this embodiment, multiple predefined value intervals are used to match temperature deviation values ​​to obtain a target value interval, and multiple predefined superheat correction relationships are used to match the initial superheat to obtain a target superheat correction relationship. The target superheat corresponding to the target value interval is obtained through the target superheat correction relationship. Thus, by matching and calculating multiple pre-set superheat correction relationships and multiple value intervals, accurate matching of the corresponding target superheat is ensured in various air conditioning cooling scenarios.

[0066] In step S643, if it is determined that the indoor ambient humidity exceeds the humidity threshold, the initial superheat is corrected according to the indoor ambient humidity to determine the second target superheat of the electronic expansion valve. The second target superheat indicates that the outlet pipe temperature of the evaporator is greater than the inlet pipe temperature of the evaporator, so as to improve the dehumidification effect of the air conditioner by using superheat correction.

[0067] In some implementations, a target superheat corresponding to the initial superheat is determined based on a superheat update relationship corresponding to indoor ambient humidity. This superheat update relationship defines the relationship between the initial superheat and the target superheat. Therefore, when indoor ambient humidity is too high, there is no need to consider the cooling effect caused by the deviation between the indoor ambient temperature and the indoor unit's air outlet temperature. Instead, priority is given to using superheat correction to ensure that the outlet pipe temperature of the evaporator is higher than the inlet pipe temperature of the evaporator, thus achieving dehumidification during the cooling process and improving the user's comfort experience when using the air conditioner.

[0068] Regarding the setting of the humidity threshold, in one example of this application embodiment, the humidity threshold may be set by the manufacturer before the air conditioner leaves the factory. In another example of this application embodiment, when setting the humidity threshold, the user setting instruction is obtained, the user's preferred humidity in the user setting instruction is parsed, and then the humidity threshold is determined based on the user's preferred humidity. Thus, the humidity threshold used to switch the superheat calculation method is determined in combination with the user's preferred humidity, meeting the personalized cooling needs of different users.

[0069] Figure 7 A flowchart illustrating an example of an electronic expansion valve superheat control method according to an embodiment of this application is shown.

[0070] like Figure 7 As shown, in step S710, the indoor ambient temperature Tai, the outdoor ambient temperature Tao, the indoor ambient humidity RH, and the indoor unit air outlet temperature Tout are collected.

[0071] In step S720, it is detected whether Tao exceeds the temperature threshold A1.

[0072] In step S731, when Tao > A1, it is detected whether Tai exceeds the temperature threshold A2.

[0073] In step S740, when Tao > A1 and Tai > A2, the initial superheat SH = A3 of the indoor unit's electronic expansion valve is determined.

[0074] In step S733, when Tao ≤ A1, it is detected whether Tao exceeds the temperature threshold A4.

[0075] In step S751, when A1 > Tao ≥ A4, the initial superheat of the indoor unit's electronic expansion valve is determined to be SH = A5.

[0076] In step S753, when Tao < A4, the initial superheat of the indoor unit's electronic expansion valve is determined to be SH = A6.

[0077] It should be understood that A1, A2, A3, A4, A5 and A6 can use any suitable preset temperature value and can be adjusted according to different business scenarios. No numerical restrictions are imposed here.

[0078] Therefore, the superheat SH is initially set by Tai and Tao, and the indoor temperature is only considered when the outdoor temperature is too high. When the outdoor temperature is relatively low, the cooling effect of the air conditioner is generally better, and there is no need to make a second judgment based on the indoor temperature.

[0079] In step S760, the temperature deviation value ΔT between Tai and Tout is determined, and the initial superheat SH is corrected based on ΔT and RH. Specifically, refer to the example in Table 1.

[0080] Table 1 Initial Superheat Correction Table

[0081]

[0082] In this embodiment, a temperature sensor is added to the indoor unit's air outlet. By comparing the temperature with the ambient indoor temperature, the load demand inside is determined. Then, an indoor humidity sensor is used to correct the initial superheat, improving cooling efficiency while ensuring comfortable humidity levels in the refrigerated space. This enhances the detection and determination of the deviation between the indoor unit's air outlet temperature and the ambient indoor temperature, quantifies the cooling load demand of the indoor unit, accurately sets the superheat, and improves the precise control of refrigerant flow, thus better meeting the user's air conditioning cooling needs.

[0083] The electronic expansion valve superheat control device provided in this application is described below. The electronic expansion valve superheat control device described below can be referred to in correspondence with the electronic expansion valve superheat control method described above.

[0084] Figure 8 A structural block diagram of an example of an electronic expansion valve superheat control device according to an embodiment of this application is shown.

[0085] like Figure 8 As shown, the electronic expansion valve superheat control device 800 includes an acquisition unit 810, a determination unit 820, and a correction unit 830.

[0086] The acquisition unit 810 is configured to acquire the outdoor ambient temperature, the indoor unit air outlet temperature, and the indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment where the outdoor unit of the air conditioner is located, the indoor ambient temperature is the temperature of the environment where the indoor unit of the air conditioner is located, and the indoor unit includes an electronic expansion valve.

[0087] The determining unit 820 is configured to determine the initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat.

[0088] The correction unit 830 is configured to correct the initial superheat based on the temperature deviation between the indoor ambient temperature and the indoor unit outlet temperature to determine the target superheat of the electronic expansion valve.

[0089] Figure 9 A structural block diagram of an example of a central air conditioning system according to an embodiment of this application is shown.

[0090] like Figure 9 As shown, the central air conditioning unit 900 includes an outdoor unit 910 and an indoor unit 920. The indoor unit 920 includes an electronic expansion valve 921 and a controller 923. The controller 923 enables the implementation of the electronic expansion valve superheat control method described above, achieving the same or similar technical effects as the above-described method embodiments. Further details can be found in the above description. Figure 1-7 The relevant descriptions in the text will not be repeated here.

[0091] Figure 10 An example is a schematic diagram of the physical structure of an air conditioner, such as... Figure 10 As shown, the air conditioner may include: a processor 1010, a communication interface 1020, a memory 1030, and a communication bus 1040, wherein the processor 1010, the communication interface 1020, and the memory 1030 communicate with each other through the communication bus 1040. The processor 1010 can call logic instructions in the memory 1030 to execute an electronic expansion valve superheat control method. This method includes: acquiring the outdoor ambient temperature, the indoor unit air outlet temperature, and the indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment where the outdoor unit of the air conditioner is located, the indoor ambient temperature is the temperature of the environment where the indoor unit of the air conditioner is located, and the indoor unit includes an electronic expansion valve; determining an initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat; and correcting the initial superheat according to the temperature deviation between the indoor ambient temperature and the indoor unit air outlet temperature to determine the target superheat of the electronic expansion valve.

[0092] Furthermore, the logical instructions in the aforementioned memory 1030 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0093] On the other hand, this application also provides a computer program product, which includes a computer program that can be stored on a computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the electronic expansion valve superheat control method provided by the above methods. The method includes: acquiring an outdoor ambient temperature, an indoor unit air outlet temperature, and an indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment where the outdoor unit of the air conditioner is located, and the indoor ambient temperature is the temperature of the environment where the indoor unit of the air conditioner is located, the indoor unit including an electronic expansion valve; determining an initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat; and correcting the initial superheat according to the temperature deviation between the indoor ambient temperature and the indoor unit air outlet temperature to determine the target superheat of the electronic expansion valve.

[0094] In another aspect, this application also provides a computer-readable storage medium, the computer-readable storage medium including a stored program, wherein the program, when running, executes the electronic expansion valve superheat control method provided by the above methods, the method including: acquiring an outdoor ambient temperature, an indoor unit air outlet temperature, and an indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment where the outdoor unit of the air conditioner is located, the indoor ambient temperature is the temperature of the environment where the indoor unit of the air conditioner is located, and the indoor unit includes an electronic expansion valve; determining an initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat; correcting the initial superheat according to the temperature deviation between the indoor ambient temperature and the indoor unit air outlet temperature, so as to determine the target superheat of the electronic expansion valve.

[0095] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0096] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for controlling the superheat of an electronic expansion valve, characterized in that, The method includes: The system acquires the outdoor ambient temperature, the indoor unit's air outlet temperature, and the indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment where the outdoor unit of the air conditioner is located, and the indoor ambient temperature is the temperature of the environment where the indoor unit of the air conditioner is located; the indoor unit includes an electronic expansion valve. Based on a preset superheat setting model, an initial superheat corresponding to the outdoor ambient temperature is determined; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat. The initial superheat is corrected based on the temperature deviation between the indoor ambient temperature and the indoor unit air outlet temperature to determine the target superheat of the electronic expansion valve. The superheat setting model includes a first model module and a second model module. The step of determining the initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model includes: Detect whether the outdoor ambient temperature exceeds a preset temperature threshold; If the outdoor ambient temperature does not exceed the temperature threshold, the initial superheat corresponding to the outdoor ambient temperature is determined based on the first model module; the first model module defines the relationship between the outdoor ambient temperature and the initial superheat. If the outdoor ambient temperature exceeds the temperature threshold, the initial superheat corresponding to the outdoor ambient temperature and the indoor ambient temperature is determined based on the second model module; the second model module defines the relationship between the outdoor ambient temperature, the indoor ambient temperature and the initial superheat.

2. The method for controlling the superheat of an electronic expansion valve according to claim 1, characterized in that, The step of correcting the initial superheat based on the temperature deviation between the indoor ambient temperature and the indoor unit's air outlet temperature to determine the target superheat of the electronic expansion valve includes: Obtain indoor humidity; If the indoor ambient humidity does not exceed the preset humidity threshold, the initial superheat is corrected according to the temperature deviation between the indoor ambient temperature and the indoor unit outlet temperature to determine the first target superheat of the electronic expansion valve. The first target superheat indicates that the outlet pipe temperature of the evaporator is less than or equal to the inlet pipe temperature of the evaporator.

3. The method for controlling the superheat of the electronic expansion valve according to claim 2, characterized in that, After obtaining the indoor humidity, the method further includes: If the indoor ambient humidity exceeds the humidity threshold, the initial superheat is corrected based on the indoor ambient humidity to determine the second target superheat of the electronic expansion valve. The second target superheat indicates that the outlet pipe temperature of the refrigeration evaporator is greater than the inlet pipe temperature of the refrigeration evaporator.

4. The method for controlling the superheat of the electronic expansion valve according to claim 3, characterized in that, The step of correcting the initial superheat based on the indoor ambient humidity to determine the target superheat of the electronic expansion valve includes: Based on the superheat update relationship corresponding to the indoor ambient humidity, the target superheat corresponding to the initial superheat is determined; the superheat update relationship defines the relationship between the initial superheat and the target superheat.

5. The method for controlling the superheat of an electronic expansion valve according to claim 2, characterized in that, The operation of setting the humidity threshold includes: Obtain user setting instructions, wherein the user setting instructions include user-preferred humidity; The humidity threshold is determined based on the user's preferred humidity level.

6. The method for controlling the superheat of an electronic expansion valve according to claim 2, characterized in that, The step of correcting the initial superheat based on the temperature deviation between the indoor ambient temperature and the indoor unit's air outlet temperature to determine the target superheat of the electronic expansion valve includes: From multiple preset value ranges, determine the target value range that matches the temperature deviation value; From the plurality of preset superheat correction relationships, a target superheat correction relationship matching the initial superheat is determined; each of the superheat correction relationships has a corresponding initial superheat, and the superheat correction relationship includes a plurality of preset value ranges and a corresponding target superheat. Based on the target superheat correction relationship, the target superheat corresponding to the target value range is determined.

7. The method for controlling the superheat of an electronic expansion valve according to claim 1, characterized in that, The step of correcting the initial superheat based on the temperature deviation between the indoor ambient temperature and the indoor unit's air outlet temperature to determine the target superheat of the electronic expansion valve includes: The initial superheat is corrected based on the temperature deviation between the indoor ambient temperature and the indoor unit's air outlet temperature to determine the corresponding first superheat. Obtain the air conditioner airflow setting information, and determine the corresponding second superheat based on the air conditioner airflow setting information; The target superheat of the electronic expansion valve is determined based on the first superheat and the second superheat.

8. An electronic expansion valve superheat control device, characterized in that, The device includes: The acquisition unit is configured to acquire the outdoor ambient temperature, the indoor unit air outlet temperature, and the indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment where the outdoor unit of the air conditioner is located, the indoor ambient temperature is the temperature of the environment where the indoor unit of the air conditioner is located, and the indoor unit includes an electronic expansion valve. The determining unit is configured to determine the initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat. The correction unit is configured to correct the initial superheat based on the temperature deviation between the indoor ambient temperature and the indoor unit outlet temperature to determine the target superheat of the electronic expansion valve. The superheat setting model includes a first model module and a second model module. The step of determining the initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model includes: Detect whether the outdoor ambient temperature exceeds a preset temperature threshold; If the outdoor ambient temperature does not exceed the temperature threshold, the initial superheat corresponding to the outdoor ambient temperature is determined based on the first model module; the first model module defines the relationship between the outdoor ambient temperature and the initial superheat. If the outdoor ambient temperature exceeds the temperature threshold, the initial superheat corresponding to the outdoor ambient temperature and the indoor ambient temperature is determined based on the second model module; the second model module defines the relationship between the outdoor ambient temperature, the indoor ambient temperature and the initial superheat.

9. A central air conditioning system, characterized in that, include: Outdoor unit; The indoor unit includes an electronic expansion valve and a controller; The controller is used to perform the electronic expansion valve superheat control method as described in any one of claims 1-7.

10. An air conditioner, comprising a memory and a processor, the memory storing a computer program, the processor being configured to execute, via the computer program, the electronic expansion valve superheat control method as described in any one of claims 1-7.

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