Electronic expansion valve superheat degree control method and device and central air conditioner

Abstract

The invention discloses an electronic expansion valve superheat degree control method and device and a central air conditioner, and relates to the technical field of air conditioner refrigeration. The electronic expansion valve superheat degree control method comprises the steps that the outdoor environment temperature, the indoor unit air outlet temperature and the indoor environment temperature are obtained; based on a preset superheat degree setting model, determining an initial superheat degree corresponding to the outdoor environment temperature; the superheat degree setting model defines the relationship between the outdoor environment temperature and the initial superheat degree; and the initial superheat degree is corrected according to the temperature deviation value between the indoor environment temperature and the indoor unit air outlet temperature, so that the target superheat degree of the electronic expansion valve is determined. Therefore, a brand new scheme for determining the target superheat degree is provided, correction is conducted through the temperature deviation value between the indoor environment temperature and the indoor unit air outlet temperature, the actual indoor refrigeration load requirement can be accurately matched, and the air conditioner comfort experience of indoor users is effectively guaranteed.

Description

Technical Field

[0001] The present 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 conditioner and computer-readable storage medium. Background Art

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

[0003] When the split air conditioner is cooling, the indoor unit controls the electronic expansion valve to adjust the refrigerant flow rate based on the superheat. The superheat represents the temperature difference between the outlet pipe temperature and the inlet pipe temperature of the refrigeration evaporator. However, during the operation of the air conditioner, there may be deviations in the measurement results of the inlet or outlet pipe temperature. The current control method for the refrigerant flow rate is relatively simple and cannot accurately match the indoor load requirements, affecting the indoor user's air conditioning experience.

[0004] In response to the above problems, the industry has not yet proposed a better technical solution. Summary of the invention

[0005] The present application provides an electronic expansion valve superheat control method, device, central air conditioner and computer-readable storage medium, which are used to at least solve the defects of the prior art that the refrigerant flow control index of the air conditioner is single and cannot match the actual load demand in the room.

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

[0007] According to a superheat control method for an electronic expansion valve provided in the present application, the superheat setting model includes a first model module and a second model module, wherein the initial superheat corresponding to the outdoor ambient temperature is determined based on the preset superheat setting model, including: 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 and the indoor ambient temperature and the initial superheat.

[0008] According to a superheat control method for an electronic expansion valve provided in the present application, the initial superheat is corrected according to the temperature deviation value between the indoor ambient temperature and the indoor unit air outlet temperature to determine the target superheat of the electronic expansion valve, including: obtaining the indoor ambient humidity; when it is determined that the indoor ambient humidity does not exceed a preset humidity threshold, correcting the initial superheat according to the temperature deviation value between the indoor ambient temperature and the indoor unit air outlet temperature to determine a first target superheat of the electronic expansion valve, the first target superheat indicating that the outlet pipe temperature of the refrigeration evaporator is less than or equal to the inlet pipe temperature of the refrigeration evaporator.

[0009] According to a method for controlling superheat of an electronic expansion valve provided in the present 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 according to 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 a superheat control method for an electronic expansion valve provided in the present application, the initial superheat is corrected according to the indoor ambient humidity to determine the target superheat of the electronic expansion valve, including: determining the target superheat corresponding to the initial superheat based on a 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 an electronic expansion valve superheat control method provided in the present 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 a superheat control method for an electronic expansion valve provided in the present application, the initial superheat is corrected according to the temperature deviation value between the indoor ambient temperature and the indoor unit outlet temperature to determine the target superheat of the electronic expansion valve, including: determining a target value interval matching the temperature deviation value from a plurality of preset value intervals; determining a target superheat correction relationship matching the initial superheat from the plurality of preset superheat correction relationships; each of the superheat correction relationships has a corresponding initial superheat, and the superheat correction relationship includes a plurality of preset value intervals and a corresponding target superheat; based on the target superheat correction relationship, determining a target superheat corresponding to the target value interval.

[0013] According to a method for controlling superheat of an electronic expansion valve provided in the present application, the initial superheat is corrected according to the temperature deviation value between the indoor ambient temperature and the indoor unit air outlet temperature to determine the target superheat of the electronic expansion valve, including: correcting the initial superheat according to the temperature deviation value between the indoor ambient temperature and the indoor unit air outlet temperature to determine a corresponding first superheat; acquiring air volume setting information of an air conditioner, and determining a corresponding second superheat according to the air volume setting information of the air conditioner; and determining the target superheat of the electronic expansion valve according to the first superheat and the second superheat.

[0014] The present 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 air outlet temperature and an indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment in which the outdoor unit of the air conditioner is located, the indoor ambient temperature is the temperature of the environment in which the indoor unit of the air conditioner is located, and the indoor unit comprises 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; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat; a correction unit, configured to correct the initial superheat according to a temperature deviation value between the indoor ambient temperature and the indoor unit air outlet temperature, so as to determine a target superheat of the electronic expansion valve.

[0015] The present application also provides a central air conditioner, comprising: an outdoor unit; an indoor unit, comprising an electronic expansion valve and a controller; wherein the controller is used to execute any of the electronic expansion valve superheat control methods described above.

[0016] The present application also provides an air conditioner, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute any of the above-mentioned electronic expansion valve superheat control methods through the computer program.

[0017] The present application also provides a computer-readable storage medium, which includes a stored program, wherein when the program is run, it executes and implements any of the above-mentioned electronic expansion valve superheat control methods.

[0018] The present application also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements any of the above-mentioned electronic expansion valve superheat control methods.

[0019] The electronic expansion valve superheat control method, device and central air conditioner provided in this application collect the outdoor ambient temperature, indoor unit air outlet temperature and indoor ambient temperature of the air conditioner, determine the initial superheat of the outdoor ambient temperature according to the superheat setting model, and use the temperature deviation value between the indoor ambient temperature and the indoor unit air outlet temperature for correction, and quantitatively evaluate the actual load demand of indoor refrigeration. Therefore, a new scheme for determining the target superheat is proposed. By correcting the superheat, the actual indoor refrigeration load demand is accurately matched, avoiding large fluctuations in the indoor ambient temperature, and effectively ensuring the air conditioning comfort experience of indoor users. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

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

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

[0024] Figure 3 A flowchart showing an example of a method for controlling superheat of an electronic expansion valve according to an embodiment of the present application is shown;

[0025] Figure 4 Shown according to Figure 3 An exemplary operation flow chart of step S320 in FIG.

[0026] Figure 5 Shown according to Figure 3An exemplary operation flow chart of step S330 in FIG.

[0027] Figure 6 A flowchart showing an example of a method for controlling superheat of an electronic expansion valve according to an embodiment of the present application is shown;

[0028] Figure 7 A flowchart showing an example of a method for controlling superheat of an electronic expansion valve according to an embodiment of the present 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 the present application is shown;

[0030] Fig. 9 A structural block diagram of an example of a central air conditioner according to an embodiment of the present application is shown;

[0031] Fig.10 It is a structural schematic diagram of the air conditioner provided in this application. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work 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 and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] According to one aspect of an embodiment of the present application, a method for controlling superheat of an electronic expansion valve is provided. The method for controlling superheat of an electronic expansion valve is widely used in smart home, smart home, smart home device ecology, smart residential ecology and other whole-house intelligent digital control application scenarios. Optionally, in this embodiment, the method for controlling superheat of an electronic expansion valve can be applied to Figure 1 In the hardware environment shown in FIG. 1 , a terminal device 102 (eg, air conditioner) and a server 104 are provided. Figure 1 As shown, the server 104 is connected to the terminal device 102 via a network, and can be used to provide services (such as application services, etc.) for the terminal or a client installed on the terminal. A database can be set on the server or independently of the server to provide data storage services for the server 104. Cloud computing and / or edge computing services can be configured on the server or independently of the server to provide data computing services for the server 104.

[0035] The above network may include but is not limited to at least one of the following: wired network, wireless network. The above wired network may include but is not limited to at least one of the following: wide area network, metropolitan area network, local area network, and the above wireless network may include but is not limited to at least one of the following: WIFI (Wireless Fidelity), Bluetooth.

[0036] Figure 2 A structural block diagram of an example of an air conditioner suitable for applying the electronic expansion valve superheat control method according to an embodiment of the present 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 unit pipelines. A refrigeration evaporator 211 is provided in the indoor unit 210 for performing heat dissipation and refrigeration operations on the refrigerant fluid. Corresponding temperature sensors 213 and 212 are provided at the inlet and outlet of the refrigeration evaporator 211, respectively. Exemplarily, the temperature measured by the temperature sensor 212 is TC1, the temperature measured by the temperature sensor 213 is TC2, and 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 of the indoor unit.

[0038] Figure 3A flowchart of an example of a method for controlling superheat of an electronic expansion valve according to an embodiment of the present application is shown. Regarding the implementation subject of the method of the embodiment of the present application, it can be various processors or controllers with processing capabilities or computing capabilities, and can be set in an air-conditioning terminal, such as an indoor unit, through local data processing, and can also integrate data communication with the server to achieve the goal of regulating the superheat of the electronic expansion valve of the indoor unit, ensure that the refrigerant flow control can match the actual indoor load demand, and effectively ensure 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 is the temperature of the environment in which 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 is the temperature of the environment in which 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 is 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 indoor unit air outlet temperature.

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

[0042] In some examples of the embodiments of the present application, multiple outdoor ambient temperatures and corresponding pre-designed initial superheats are counted in advance, and linear or nonlinear relationship calibration is performed to obtain a superheat setting model. Furthermore, according to the superheat setting model, the obtained outdoor ambient temperature is queried and matched to obtain the corresponding initial superheat.

[0043] In step S330, the initial superheat is corrected 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.

[0044] In one example of the embodiment of the present application, the correction amount for the initial superheat is positively correlated with the temperature deviation value, that is, when the temperature deviation value is larger, the corresponding correction amount for the initial superheat is also larger. In another example of the embodiment of the present application, a new target superheat is re-determined based on the temperature deviation value and the initial superheat, for example, by looking up a table or calculating a model.

[0045] Through the embodiments of the present application, the current indoor load demand can be quantified through the temperature deviation value between the indoor ambient temperature and the indoor unit outlet temperature, so that the initial superheat can be corrected, which can accurately match the actual indoor load demand and avoid large fluctuations in the indoor ambient temperature, thereby effectively ensuring the air-conditioning comfort experience of indoor users.

[0046] Figure 4 Shown according to Figure 3 An example operation flow chart of step S320 in FIG.

[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, an initial superheat corresponding to the outdoor ambient temperature is determined based on a first model module in a superheat setting model, where the first model module defines a 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, and the second model module defines the relationship between the outdoor ambient temperature, the indoor ambient temperature and the initial superheat.

[0050] Through the embodiment of the present application, the outdoor ambient temperature is compared with the temperature threshold. If the outdoor ambient temperature is relatively high, the cooling effect of the air conditioner may be affected to a certain extent. It is necessary to comprehensively consider the outdoor ambient temperature and the indoor ambient temperature, and obtain the matching initial superheat by querying the corresponding predefined relationship. In addition, if the outdoor ambient temperature is relatively low, the cooling effect of the air conditioner will generally be relatively better, and there is no need to make a secondary judgment on the indoor ambient temperature. The matching initial superheat is obtained by querying the corresponding predefined relationship, which improves the efficiency of setting the initial superheat.

[0051] Figure 5 Shown according to Figure 3 An example operation flow chart of step S330 in FIG.

[0052] In step S510, the initial superheat degree is corrected according to the temperature deviation value between the indoor ambient temperature and the indoor unit outlet temperature to determine a corresponding first superheat degree.

[0053] In step S520, the air volume setting information of the air conditioner is obtained, and the corresponding second superheat degree is determined according to the air volume setting information of the air conditioner.

[0054] Specifically, the superheat is determined according to the air volume of the air conditioner. For example, the superheat corresponding to strong wind is "3", the superheat corresponding to medium wind is "2", and the superheat corresponding to weak wind is "1".

[0055] In step S530, a target superheat degree of the electronic expansion valve is determined according to the first superheat degree and the second superheat degree.

[0056] In one example of the embodiment of the present application, the target superheat is determined according to the average value of the first superheat and the second superheat. In another example of the embodiment of the present application, the first superheat and the second superheat are weighted according to a preset weight setting to obtain a corresponding target superheat.

[0057] Through the embodiments of the present application, the superheats determined by various superheat algorithms are comprehensively considered, so that the target superheat finally determined can be applicable to more types of air conditioning usage scenarios.

[0058] Figure 6 A flowchart of an example of a method for controlling superheat of an electronic expansion valve according to an embodiment of the present application is shown.

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

[0060] Exemplarily, data communication is performed with a humidity sensor provided in the environment where the indoor unit is located to collect the corresponding indoor environment humidity.

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

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

[0063] In step S641, when it is determined that the indoor environment humidity does not exceed the preset humidity threshold, the initial superheat is corrected according to the temperature deviation between the indoor environment temperature and the indoor unit outlet temperature to determine the first target superheat of the electronic expansion valve. At this time, the first target superheat should be a negative number or zero, that is, the outlet pipe temperature of the refrigeration evaporator is less than or equal to the inlet pipe temperature of the refrigeration evaporator, so as to further improve the refrigeration effect of the air conditioner by using the superheat correction.

[0064] In some embodiments, a target value interval matching the temperature deviation value is determined from a plurality of preset value intervals. 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 comprising a plurality of preset value intervals and corresponding target superheats. Further, based on the target superheat correction relationship, a target superheat corresponding to the target value interval is determined.

[0065] In the embodiment of the present application, multiple value intervals are pre-defined to match the temperature deviation values ​​respectively, to obtain the target value interval, and multiple superheat correction relationships are preset to match the initial superheat respectively, to obtain the target superheat correction relationship. The target superheat corresponding to the target value interval is obtained through the target superheat correction relationship. Therefore, through the matching calculation of the preset multiple superheat correction relationships and the multiple value intervals, the corresponding target superheat is accurately matched in various air conditioning and refrigeration scenarios.

[0066] In step S643, when 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 refrigeration evaporator is greater than the inlet pipe temperature of the refrigeration evaporator, so as to utilize the superheat correction to improve the dehumidification effect of the air conditioner.

[0067] In some embodiments, based on the superheat update relationship corresponding to the indoor environment humidity, the target superheat corresponding to the initial superheat is determined, and the superheat update relationship defines the relationship between the initial superheat and the target superheat. Therefore, when the indoor environment humidity is too high, there is no need to consider the refrigeration effect caused by the deviation between the indoor environment temperature and the indoor unit outlet temperature, but priority is given to making the outlet pipe temperature of the refrigeration evaporator greater than the inlet pipe temperature of the refrigeration evaporator through superheat correction, so as to achieve dehumidification operation during the refrigeration process and improve the user's comfort experience when using the air conditioner.

[0068] Regarding the setting operation of the above-mentioned humidity threshold, in one example of the embodiment of the present application, the humidity threshold may be set by the manufacturer before the air conditioner leaves the factory. In another example of the embodiment of the present application, when setting the humidity threshold, a user setting instruction is obtained, the user preferred humidity in the user setting instruction is parsed, and then the humidity threshold is determined based on the user preferred humidity, thereby determining the humidity threshold for switching the superheat calculation method in combination with the user preferred humidity, thereby meeting the personalized cooling needs of different users.

[0069] Figure 7 A flowchart of an example of a method for controlling superheat of an electronic expansion valve according to an embodiment of the present application is shown.

[0070] like Figure 7 As shown, in step S710, the indoor environment temperature Tai, the outdoor environment temperature Tao, the indoor environment humidity RH, and the indoor unit 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, it is determined that the initial superheat degree SH of the indoor unit electronic expansion valve is equal to A3.

[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, it is determined that the initial superheat degree SH of the indoor unit electronic expansion valve is equal to A5.

[0076] In step S753, when Tao<A4, it is determined that the initial superheat degree SH of the indoor unit electronic expansion valve is equal to A6.

[0077] It should be understood that A1, A2, A3, A4, A5 and A6 can adopt any suitable preset temperature values ​​and can be adjusted according to different business scenarios. The numerical values ​​are not restricted here for the time being.

[0078] Therefore, the superheat SH is initially set through Tai and Tao, and the indoor temperature is considered only 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 secondary 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 the embodiment of the present application, a temperature sensor is added to the air outlet of the indoor unit, and the load demand inside is determined by comparing it with the indoor ambient temperature, and then the initial superheat is corrected by using the indoor humidity sensor, so as to improve the cooling effect while ensuring the comfort of the humidity in the indoor cooling space. As a result, the determination and detection of the deviation value between the air outlet temperature of the indoor unit and the indoor ambient temperature is added, the demand for indoor unit cooling load is quantified, the superheat is accurately set, and the precise control of the refrigerant flow is improved, which can better meet the user's air conditioning and cooling needs.

[0083] The electronic expansion valve superheat control device provided in the present application is described below. The electronic expansion valve superheat control device described below and the electronic expansion valve superheat control method described above can be referenced to each other.

[0084] Figure 8 A structural block diagram of an example of an electronic expansion valve superheat control device according to an embodiment of the present 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 outlet temperature and the indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment in which the outdoor unit of the air conditioner is located, and the indoor ambient temperature is the temperature of the environment in which the indoor unit of the air conditioner is located, and the indoor unit includes an electronic expansion valve.

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

[0088] The correction unit 830 is configured to correct the initial superheat degree according to a temperature deviation value between the indoor ambient temperature and the indoor unit outlet temperature, so as to determine a target superheat degree of the electronic expansion valve.

[0089] Fig. 9 A structural block diagram of an example of a central air conditioner according to an embodiment of the present application is shown.

[0090] like Fig. 9 As shown, the central air conditioner 900 includes an outdoor unit 910 and an indoor unit 920, and the indoor unit 920 includes an electronic expansion valve 921 and a controller 923. Through the controller 923, the electronic expansion valve superheat control method as described above can be implemented, and the same or similar technical effects as the above method embodiment can be achieved. For more details, please refer to the above combined Figure 1-7 The relevant description in will not be repeated here.

[0091] Fig.10 An example of a physical structure diagram of an air conditioner is shown in FIG. Fig.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 may call the logic instructions in the memory 1030 to execute the electronic expansion valve superheat control method, the method comprising: obtaining the outdoor environment temperature, the indoor unit outlet temperature and the indoor environment temperature; the outdoor environment temperature is the temperature of the environment where the outdoor unit of the air conditioner is located, the indoor environment 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; based on a preset superheat setting model, determining the initial superheat corresponding to the outdoor environment temperature; the superheat setting model defines the relationship between the outdoor environment temperature and the initial superheat; correcting the initial superheat according to the temperature deviation value between the indoor environment temperature and the indoor unit outlet temperature to determine the target superheat of the electronic expansion valve.

[0092] In addition, the logic instructions in the above-mentioned memory 1030 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on such an understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0093] On the other hand, the present application also provides a computer program product, which includes a computer program, which 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 including: obtaining the outdoor ambient temperature, the indoor unit outlet temperature and the indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment in which the outdoor unit of the air conditioner is located, the indoor ambient temperature is the temperature of the environment in which the indoor unit of the air conditioner is located, and the indoor unit includes an electronic expansion valve; based on a preset superheat setting model, determining an initial superheat corresponding to the outdoor ambient temperature; 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 value between the indoor ambient temperature and the indoor unit outlet temperature to determine the target superheat of the electronic expansion valve.

[0094] On the other hand, the present application also provides a computer-readable storage medium, which includes a stored program, wherein when the program is run, the electronic expansion valve superheat control method provided by the above-mentioned methods is executed, and the method includes: obtaining the outdoor ambient temperature, the indoor unit outlet temperature and the indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment in which the outdoor unit of the air conditioner is located, and the indoor ambient temperature is the temperature of the environment in which the indoor unit of the air conditioner is located, and the indoor unit includes an electronic expansion valve; based on a preset superheat setting model, determining an initial superheat corresponding to the outdoor ambient temperature; 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 value between the indoor ambient temperature and the indoor unit outlet temperature to determine the target superheat of the electronic expansion valve.

[0095] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0096] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment 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 the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for controlling superheat of an electronic expansion valve, characterized in that: The method comprises: Obtaining the outdoor ambient temperature, the indoor unit outlet temperature and the indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment in which the outdoor unit of the air conditioner is located, and the indoor ambient temperature is the temperature of the environment in which 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 a relationship between the outdoor ambient temperature and the initial superheat; The initial superheat degree is corrected according to a temperature deviation value between the indoor ambient temperature and the indoor unit air outlet temperature to determine a target superheat degree of the electronic expansion valve.

2. The electronic expansion valve superheat control method according to claim 1, characterized in that: The superheat setting model comprises a first model module and a second model module. Wherein, determining the initial superheat corresponding to the outdoor ambient temperature based on a 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 an initial superheat corresponding to the outdoor ambient temperature based on the first model module; the first model module defines a relationship between the outdoor ambient temperature and the initial superheat; If the outdoor ambient temperature exceeds the temperature threshold, an 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 a relationship between the outdoor ambient temperature, the indoor ambient temperature and the initial superheat.

3. The electronic expansion valve superheat control method according to claim 1, characterized in that: The 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 includes: Get the indoor humidity; When it is determined that the indoor ambient humidity does not exceed a preset humidity threshold, the initial superheat is corrected according to the temperature deviation value between the indoor ambient temperature and the indoor unit 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 refrigeration evaporator is less than or equal to the inlet pipe temperature of the refrigeration evaporator.

4. The electronic expansion valve superheat control method according to claim 3, characterized in that: After obtaining the indoor environmental humidity, the method further includes: When 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 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.

5. The method for controlling superheat of an electronic expansion valve according to claim 4, characterized in that: The correcting the initial superheat according to the indoor ambient humidity to determine the target superheat of the electronic expansion valve comprises: Based on a superheat updating relationship corresponding to the indoor ambient humidity, a target superheat corresponding to the initial superheat is determined; the superheat updating relationship defines a relationship between the initial superheat and the target superheat.

6. The method for controlling superheat of an electronic expansion valve according to claim 3, characterized in that: The setting operation for the humidity threshold includes: Obtaining a user setting instruction, wherein the user setting instruction includes a user preferred humidity; Based on the user preferred humidity, the humidity threshold is determined.

7. The method for controlling superheat of an electronic expansion valve according to claim 3, characterized in that: The 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 includes: Determining a target value interval matching the temperature deviation value from a plurality of preset value intervals; Determining a target superheat correction relationship matching the initial superheat from the plurality of preset superheat correction relationships; each of the superheat correction relationships has a corresponding initial superheat, and the superheat correction relationship includes a plurality of preset value intervals and corresponding target superheats; Based on the target superheat correction relationship, a target superheat corresponding to the target value interval is determined.

8. The method for controlling superheat of an electronic expansion valve according to claim 1, characterized in that: The 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 includes: Correcting the initial superheat degree according to a temperature deviation value between the indoor ambient temperature and the indoor unit air outlet temperature to determine a corresponding first superheat degree; Acquiring air volume setting information of the air conditioner, and determining a corresponding second superheat degree according to the air volume setting information of the air conditioner; A target superheat degree of the electronic expansion valve is determined according to the first superheat degree and the second superheat degree.

9. An electronic expansion valve superheat control device, characterized in that: The device comprises: An acquisition unit is configured to acquire an outdoor ambient temperature, an indoor unit outlet temperature, and an indoor ambient temperature; the outdoor ambient temperature is the temperature of an environment in which an outdoor unit of the air conditioner is located, and the indoor ambient temperature is the temperature of an environment in which an 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; the superheat setting model defines a relationship between the outdoor ambient temperature and the initial superheat; The correction unit is configured to correct the initial superheat degree according to a temperature deviation value between the indoor ambient temperature and the indoor unit air outlet temperature to determine a target superheat degree of the electronic expansion valve.

10. A central air conditioner, characterized in that: include: Outdoor unit; Indoor unit, including electronic expansion valve and controller; Wherein, the controller is used to execute the electronic expansion valve superheat control method as described in any one of claims 1-8.

11. An air conditioner, comprising 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 according to any one of claims 1 to 8 through the computer program.

Images