Air conditioning system and its return air temperature determination method, device and indoor unit

Abstract

This application provides an air conditioning system and its return air temperature determination method, device, and indoor unit. The system acquires the initial return air temperature of the indoor unit when heat exchange stops, as well as target environmental information about the environment in which the indoor unit is located. Based on the initial return air temperature, a first total heat exchange is determined during heat exchange. Based on the target environmental information and the correspondence between environmental information and heat capacity, a target heat capacity value corresponding to the target environmental information is obtained. Based on the first total heat exchange, the target heat capacity value, and the initial return air temperature, the target return air temperature of the indoor unit is determined. This solution can accurately obtain the return air temperature of the indoor unit, thus ensuring comfort in the area where the indoor unit is located in various scenarios. Furthermore, by comprehensively considering current meteorological and / or time information when determining the return air temperature, the accuracy of the target return air temperature can be further improved.

Description

Technical Field

[0001] This application relates to the field of home appliance technology, specifically to an air conditioning system and its return air temperature determination method, device, and indoor unit. Background Technology

[0002] With social development and the continuous improvement of people's living standards, air conditioning systems have become one of the essential electrical appliances in homes and commercial settings. Air conditioning systems use components such as compressors, expansion valves, and heat exchangers to work with the refrigerant, achieving heat exchange between indoors and outdoors to regulate indoor temperature.

[0003] In related technologies, adjusting the air outlet temperature of an air conditioner based on the return air temperature of the indoor unit can ensure the comfort of the space where the indoor unit is located. Therefore, in practical applications, accurately obtaining the return air temperature of the indoor unit has become a pressing technical problem that needs to be solved. Summary of the Invention

[0004] In view of this, this application aims to provide an air conditioning system and a method, apparatus and indoor unit for determining the return air temperature of the same, in order to solve the technical problem that the return air temperature of the indoor unit cannot be accurately obtained in the prior art.

[0005] To achieve the above objectives, the technical solution of this application is as follows:

[0006] In a first aspect, embodiments of this application provide a method for determining the return air temperature in an air conditioning system, comprising: acquiring the initial return air temperature of the indoor unit of the air conditioning system when heat exchange stops, and target environmental information of the environment in which the indoor unit is located; determining a first total heat exchange during heat exchange by the indoor unit based on the initial return air temperature; acquiring a target heat capacity value corresponding to the target environmental information based on the target environmental information and the correspondence between the environmental information and the heat capacity value; and determining the target return air temperature of the indoor unit based on the first total heat exchange, the target heat capacity value, and the initial return air temperature.

[0007] In some embodiments, obtaining the initial return air temperature of the indoor unit of the air conditioning system when heat exchange stops includes: controlling the indoor unit valve of the indoor unit to close, and controlling the indoor unit fan to turn on, so that the indoor unit stops heat exchange; taking the first temperature of the indoor unit at a first time after heat exchange stops as the initial return air temperature; wherein the first temperature includes at least one of the following: the indoor unit's air inlet pipe temperature and air outlet pipe temperature.

[0008] In some embodiments, determining the first total heat exchange of the air conditioning system at the start of heat exchange based on the initial return air temperature includes: controlling the indoor unit valve of the indoor unit to open so that the indoor unit can start heat exchange; acquiring the first operating parameters of the compressor of the air conditioning system during at least one sampling period during the heat exchange process; determining the first heat exchange of the indoor unit during each sampling period based on the first operating parameters of the compressor during the sampling period and the initial return air temperature; and determining the total heat exchange based on the heat exchange corresponding to at least one sampling period.

[0009] In some embodiments, determining the first temperature of the indoor unit when heat exchange stops as the initial return air temperature includes: determining the first temperature of the indoor unit when heat exchange stops as the initial return air temperature when the return air temperature of the indoor unit cannot be obtained; wherein, the inability to obtain the return air temperature of the indoor unit includes at least one of the following:

[0010] The indoor unit is not equipped with a return air temperature sensor;

[0011] The return air temperature sensor of the indoor unit is faulty;

[0012] Communication failure between the return air temperature sensor and the indoor unit.

[0013] In some embodiments, obtaining the initial return air temperature of the indoor unit of the air conditioning system when heat exchange stops includes: controlling the indoor unit valve of the indoor unit to close, and controlling the indoor unit fan to turn on, so that the indoor unit stops heat exchange; determining the first temperature of the indoor unit at a first time after heat exchange stops as the initial return air temperature; wherein the first temperature includes at least one of the following: the indoor unit's air inlet pipe temperature and air outlet pipe temperature.

[0014] In some embodiments, the return air temperature determination method further includes: when the return air temperature of the indoor unit can be obtained through the return air temperature sensor, obtaining the second total heat exchange of the indoor unit; obtaining the heat capacity value of the indoor unit corresponding to at least one piece of environmental information based on the second total heat exchange; and constructing a correspondence between the information and the heat capacity value based on the heat capacity value of the indoor unit corresponding to at least one piece of environmental information.

[0015] In some embodiments, when the return air temperature of the indoor unit can be obtained through the return air temperature sensor, obtaining the second total heat exchange of the indoor unit includes: when the return air temperature of the indoor unit can be obtained through the return air temperature sensor, obtaining the second operating parameters of the compressor in the air conditioning system; determining the total heat exchange of the air conditioning system based on the second operating parameters; and determining the second total heat exchange of the indoor unit based on the total heat exchange of the air conditioning system.

[0016] In some embodiments, determining the total heat exchange of the air conditioning system based on the second operating parameters includes: determining the compressor flow rate, liquid pipe enthalpy, and gas pipe enthalpy based on the second operating parameters; and determining the total heat exchange of the air conditioning system based on the flow rate, gas pipe enthalpy, and liquid pipe enthalpy.

[0017] In some embodiments, determining the second total heat exchange of the indoor unit based on the total heat exchange of the air conditioning system includes: determining the weight value of the indoor unit in the air conditioning system based on the opening degree and / or diameter of the indoor unit's valve; and determining the second total heat exchange of the indoor unit based on the total heat exchange of the air conditioning system and the weight value.

[0018] Secondly, embodiments of this application provide a return air temperature determining device in an air conditioning system, the return air temperature determining device comprising:

[0019] The acquisition module is used to acquire the initial return air temperature of the indoor unit of the air conditioning system when heat exchange stops, and the target environmental information of the environment in which the indoor unit is located; the determination module is used to determine the first total heat exchange of the indoor unit during heat exchange based on the initial return air temperature; the acquisition module is used to acquire the target heat capacity value corresponding to the target environmental information based on the target environmental information and the correspondence between the environmental information and the heat capacity value; the determination module is used to determine the target return air temperature of the indoor unit based on the first total heat exchange, the target heat capacity value, and the initial return air temperature.

[0020] In some embodiments, the acquisition module is specifically used to: control the indoor unit valve of the indoor unit to close, and control the indoor unit fan to turn on, so that the indoor unit stops heat exchange; and take the first temperature of the indoor unit at a first time after the heat exchange stops as the initial return air temperature; wherein the first temperature includes at least one of the following: the indoor unit's air inlet pipe temperature and air outlet pipe temperature.

[0021] In some embodiments, the determining module is specifically used to: control the opening of the indoor unit valve of the indoor unit to enable the indoor unit to start heat exchange; acquire the first operating parameters of the compressor of the air conditioning system during at least one sampling period during the heat exchange process; for each sampling period, determine the first heat exchange of the indoor unit during the sampling period based on the first operating parameters of the compressor during the sampling period and the initial return air temperature; and determine the first total heat exchange of the indoor unit during heat exchange based on the first heat exchange corresponding to at least one sampling period.

[0022] In some embodiments, the acquisition module is specifically used to: determine the first temperature of the indoor unit when heat exchange stops as the initial return air temperature when the return air temperature of the indoor unit cannot be obtained; wherein, the inability to obtain the return air temperature of the indoor unit includes at least one of the following:

[0023] The indoor unit is not equipped with a return air temperature sensor;

[0024] The return air temperature sensor of the indoor unit is faulty;

[0025] Communication failure between the return air temperature sensor and the indoor unit.

[0026] In some embodiments, the determining module is further configured to: when the return air temperature of the indoor unit can be obtained through the return air temperature sensor, obtain the second total heat exchange of the indoor unit; based on the second total heat exchange, obtain the heat capacity value of the indoor unit corresponding to at least one piece of environmental information; and based on the heat capacity value of the indoor unit corresponding to at least one piece of environmental information, construct a correspondence between the environmental information and the heat capacity value.

[0027] In some embodiments, the determining module is specifically used to: obtain the second operating parameters of the compressor in the air conditioning system when the return air temperature of the indoor unit can be obtained through the return air temperature sensor; determine the total heat exchange of the air conditioning system based on the second operating parameters; and determine the second total heat exchange of the indoor unit based on the total heat exchange of the air conditioning system.

[0028] In some embodiments, the determining module is specifically used to: determine the compressor flow rate, liquid pipe enthalpy, and gas pipe enthalpy based on the second operating parameters; and determine the total heat exchange of the air conditioning system based on the flow rate, gas pipe enthalpy, and liquid pipe enthalpy.

[0029] In some embodiments, the determining module is specifically used to: determine the weight value of the indoor unit in the air conditioning system based on the opening degree and / or diameter of the indoor unit valve; and determine the second total heat exchange of the indoor unit based on the total heat exchange of the air conditioning system and the weight value.

[0030] Thirdly, embodiments of this application provide an indoor unit, including a memory and a processor, wherein the memory stores a computer program; when the processor executes the computer program, it implements the return air temperature determination method as described in the first aspect.

[0031] Fourthly, embodiments of this application provide an air conditioning system, which includes a compressor and at least one indoor unit as described in the third aspect.

[0032] Fifthly, embodiments of this application provide a computer-readable storage medium storing a computer program; when the computer program is executed, it implements the return air temperature determination method as described in the first aspect.

[0033] Sixthly, embodiments of this application provide a computer program product, including: a computer program that, when executed by a processor, implements the method for determining the return air temperature of an air conditioning system as described in the first aspect.

[0034] This application provides an air conditioning system and its return air temperature determination method, device, and indoor unit. The system determines the initial return air temperature of the indoor unit when heat exchange stops, as well as the target environmental information of the environment in which the indoor unit is located. Based on the initial return air temperature, it determines the first total heat exchange during heat exchange by the indoor unit. Based on the target environmental information and the correspondence between environmental information and heat capacity, it determines the target heat capacity value corresponding to the target environmental information. Based on the first total heat exchange, the target heat capacity value, and the initial return air temperature, it determines the target return air temperature of the indoor unit. This solution can accurately obtain the return air temperature of the indoor unit, ensuring comfort in various scenarios. Furthermore, by comprehensively considering current meteorological and / or time information when determining the return air temperature, the accuracy of the target return air temperature can be further improved. Attached Figure Description

[0035] 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, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1(a) is a schematic diagram of a scenario where an air conditioning system is provided according to an embodiment of this application;

[0037] Figure 1(b) is a flowchart illustrating the method for determining return air temperature provided in an embodiment of this application;

[0038] Figure 2 A flowchart illustrating the return air temperature determination method provided in this application embodiment. Figure 2 ;

[0039] Figure 3 A flowchart illustrating the correspondence determination method provided in this application embodiment;

[0040] Figure 4 A flowchart illustrating the correspondence determination method provided in the embodiments of this application. Figure 2 ;

[0041] Figure 5 This is a schematic diagram of the return air temperature determination device provided in the embodiments of this application;

[0042] Figure 6 This is a schematic diagram of the structure of the indoor unit provided in an embodiment of this application.

[0043] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0045] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0046] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0047] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

[0048] The indoor unit's air temperature is the temperature of the air at the indoor unit's return air vent, which is close to the indoor air temperature. Therefore, related technologies allow for adjustments to the air conditioner's outlet air temperature based on the return air temperature to ensure indoor comfort. Thus, accurately obtaining the indoor unit's return air temperature is crucial; otherwise, ensuring indoor comfort is difficult.

[0049] Currently, temperature sensors are typically installed at the return air vent of the indoor unit to collect the return air temperature. However, for some air conditioners that operate for extended periods and have complex operating conditions, it may be impossible to accurately obtain the return air temperature. Specifically, this may include, but is not limited to, the following scenarios:

[0050] 1. The return air temperature sensor installed in the indoor unit is faulty and cannot collect the return air temperature;

[0051] 2. Communication failure between the return air temperature sensor and the indoor unit, preventing the collection of the outlet air temperature from being transmitted to the main control chip of the indoor unit;

[0052] 3. The return air temperature sensor may become detached or displaced, resulting in inaccurate return air temperature readings. For example, if the return air temperature sensor is moved closer to the air inlet, the measured return air temperature will differ significantly from the actual return air temperature.

[0053] On the other hand, for indoor units that are not equipped with a return air temperature sensor, it is also impossible to use the return air temperature to control the air conditioner.

[0054] Furthermore, even in scenarios where the indoor unit is equipped with a return air temperature sensor, and the sensor is capable of collecting and uploading the collected return air temperature to the main control chip, the method provided in this application embodiment can still be used to calculate the return air temperature. For example, in a scenario involving fault diagnosis of the return air temperature sensor, the return air temperature calculated using the method provided in this application embodiment can be used to determine whether the sensor has malfunctioned. For instance, if the temperature collected by the return air temperature sensor is inconsistent with the calculated return air temperature, it can be determined that the return air temperature sensor may have malfunctioned.

[0055] In view of this, embodiments of this application provide an air conditioning system and a method, apparatus, and indoor unit for determining the return air temperature. The method involves determining the initial return air temperature of the indoor unit when heat exchange stops, as well as the target environmental information of the environment in which the indoor unit is located; determining the first total heat exchange during heat exchange by the indoor unit based on the initial return air temperature; determining the target heat capacity value corresponding to the target environmental information based on the correspondence between environmental information and heat capacity value; and determining the target return air temperature of the indoor unit based on the first total heat exchange, the target heat capacity value, and the initial return air temperature. This solution can obtain the return air temperature of the indoor unit without relying on a return air temperature sensor, ensuring the comfort of the space where the indoor unit is located in various scenarios. Furthermore, by comprehensively considering current meteorological and / or time information when determining the return air temperature, the accuracy of the target return air temperature can be further improved.

[0056] It should be noted that the embodiments of this application do not specifically limit the type of air conditioning system, such as central air conditioning, floor-standing air conditioning, wall-mounted air conditioning, multi-split air conditioning, etc. In some embodiments, the above-mentioned air conditioning system may also include multiple components of one of the above-mentioned types of air conditioning, such as indoor air conditioning units, etc. It should be understood that the above-mentioned air conditioning system may also include one or more indoor units or outdoor units.

[0057] Figure 1(a) is a schematic diagram of an air conditioning system provided in an embodiment of this application. It should be noted that Figure 1(a) is shown as an example of a multi-split system, but it is not limited to this in actual applications. As shown in Figure 1(a), the air conditioning system in this scenario includes: at least one outdoor unit and at least one indoor unit (indoor unit 1, indoor unit 2, ..., indoor unit n are shown as examples in the figure).

[0058] As shown in Figure 1, indoor unit 1 is set in area 1, indoor unit 2 is set in area 2, and indoor unit n is set in area n. Since the temperature is different in different areas, the return air temperature of each indoor unit is also different. For example, the return air temperature in area 1 is 1, the return air temperature in area 2 is 2, ..., and the return air temperature in area n is n. In practical applications, the indoor unit in each area can be differentiated based on the return air temperature in each area to ensure the comfort of each area.

[0059] It should be noted that the areas in Figure 1(a) can be different spaces, or different locations within the same space (for example, when the room is large, the return air temperature of the indoor unit located in different locations of the room may also be different). This application embodiment does not impose any special limitations.

[0060] In some embodiments, the scenario may further include a control device, which may be a remote control or a mobile terminal, etc. Communication between the remote control and the indoor unit may include infrared protocol communication, Bluetooth protocol communication, or other short-range communication methods, controlling the indoor unit wirelessly or via other wired means. Users can control the indoor unit by inputting user commands through buttons on the remote control, voice input, control panel input, etc.

[0061] The indoor unit can be controlled via an application running on the mobile device. This application, through configuration, provides various controls to the user in an intuitive user interface (UI) on the screen associated with the mobile device. The control device can be a tablet, computer, laptop, or other smart device.

[0062] In some embodiments, the indoor unit can also communicate with a server (not shown in the figure) through various communication methods, such as a time server, a weather server, etc., which are not specifically limited in the embodiments of this application.

[0063] Next, through specific embodiments, we will provide a detailed explanation of how the solutions provided in this application address the aforementioned technical problems.

[0064] Figure 1(b) is a schematic flowchart of the return air temperature determination method provided in this application embodiment. It should be understood that the executing entity in this application embodiment can be a control unit in an air conditioning system, such as a main control chip, which can be located in the indoor unit or the outdoor unit. This application embodiment does not make any special limitation.

[0065] As shown in Figure 1(b), the method for determining the return air temperature provided in this embodiment includes the following steps:

[0066] S101. Obtain the initial return air temperature of the indoor unit of the air conditioning system when heat exchange stops, as well as the target environmental information of the environment where the indoor unit is located.

[0067] In this embodiment of the application, when it is necessary to obtain the current return air temperature of the indoor unit, the indoor unit can be controlled to stop heat exchange, thereby obtaining the initial return air temperature.

[0068] It should be noted that the specific type of initial return air temperature is not particularly limited in the embodiments of this application. For example, after the indoor unit stops heat exchange, the indoor temperature can be regarded as the initial return air temperature when the indoor unit starts heat exchange. Since the temperature difference at various locations on (or around) the indoor unit is small and relatively close to the indoor temperature, in one example, the initial return air temperature can be the temperature collected by the temperature sensor at any location on the indoor unit.

[0069] In the second example, some indoor units with interactive functions can obtain the initial return air temperature through interactive methods. For instance, after the indoor unit stops heat exchange, it can obtain the indoor temperature collected by other temperature measuring devices through interactive methods. The specific implementation method is not particularly limited here.

[0070] It should be noted that environmental information is a non-physical, intangible resource related to environmental protection. It is ubiquitous in nature and is a general term for numbers, texts, and graphics that represent the quantity, quality, distribution, relationship, and patterns of various inherent elements in environmental problems and their management.

[0071] In this embodiment, the target environmental information includes one or more of the following: time information, meteorological information, and climate information. The indoor unit can obtain the target environmental information through interactive means. Specifically, on the one hand, after the indoor unit stops heat exchange, it can interact with a server to obtain the target environmental information. The server may be, for example, a time server or a meteorological / climate server. On the other hand, the indoor unit can also obtain environmental information collected by other indoor devices through interactive means. The specific implementation method is not particularly limited here.

[0072] S102. Determine the initial total heat exchange of the indoor unit during heat exchange based on the initial return air temperature.

[0073] Specifically, after the indoor unit stops heat exchange and obtains the initial return air temperature, the indoor unit can be controlled to start heat exchange again.

[0074] It should be noted that the indoor unit starts heat exchange in different scenarios and the corresponding heat exchange state is different. For example, before the indoor unit stops heat exchange, it may be in the first heat exchange state. Therefore, in this step, the indoor unit can be restored to the first heat exchange state.

[0075] On the other hand, the indoor unit can also determine the current heat exchange state based on the correspondence between the initial indoor temperature and the preset heat exchange state. For example, if the initial indoor temperature is low, heat exchange can be performed in heating mode; if the indoor temperature is high, heat exchange can be performed in smart mode.

[0076] Optionally, the initial indoor temperature and preset heat exchange state can be obtained based on the user's historical control habits. As for the method of obtaining the correspondence between the initial indoor temperature and the preset heat exchange state, and the method of determining the heat exchange state based on the correspondence, it will not be explained in detail here.

[0077] In some embodiments, the heat exchange status of the indoor unit may include, but is not limited to, the following: working mode (e.g., cooling mode, heating mode, air purification mode, dehumidification mode, etc.), working parameters (indoor unit valve opening, fan speed, etc.), etc., which are not specifically limited here.

[0078] It should be noted that the method for obtaining the first total heat exchange is not specifically limited in the embodiments of this application. For example, the indoor unit can be sampled to obtain the heat exchange of the indoor unit in each sampling time, and the first total heat exchange of the indoor unit during heat exchange can be determined based on the heat exchange of the indoor unit in each sampling time. It should be understood that the method for obtaining the first total heat exchange will be shown in subsequent embodiments and is not limited here.

[0079] S103. Based on the target environment information and the correspondence between the information and the heat capacity value, determine the target heat capacity value corresponding to the current information.

[0080] It should be understood that the heat capacity values ​​are different for different time periods and under different meteorological or climatic conditions. The correspondence between environmental information and heat capacity values ​​can be obtained from the environmental information and heat capacity values ​​corresponding to the indoor unit during historical heat exchange. The specific method for obtaining the correspondence between environmental information and heat capacity values ​​will be shown in subsequent embodiments.

[0081] It should be noted that the execution order of steps S102 and S103 is not particularly limited in this embodiment.

[0082] S104. Determine the target return air temperature of the indoor unit based on the first total heat exchange, the target heat capacity, and the initial return air temperature.

[0083] Specifically, the target return air temperature T1 can be obtained using the following formula:

[0084]

[0085] Where T0 is the initial return air temperature, J is the first total heat exchange, and C is the target heat capacity.

[0086] In this embodiment, the target return air temperature of the indoor unit can be obtained without relying on the return air temperature sensor, so that indoor comfort can be guaranteed based on the target return air temperature in various scenarios. In addition, when determining the return air temperature, the accuracy of the target return air temperature can be further improved by comprehensively considering the current meteorological information and / or time information.

[0087] In some embodiments, the implementation scenarios of the above embodiments are not specifically limited in this application. For example, on the one hand, for an air conditioner without a return air temperature sensor, in order to realize the function of controlling the operation of the air conditioner based on the return air temperature, the target return air temperature can be determined in real time by the above method, and then the air conditioner can be controlled according to the target return air temperature to ensure indoor comfort.

[0088] On the other hand, for air conditioners equipped with return air temperature sensors, there may be situations where the return air temperature cannot be accurately obtained during the operation of the air conditioner based on the return air temperature. The return air temperature can be determined in real time according to the method provided in the above embodiments.

[0089] Specifically, in one example, when the return air temperature sensor of the indoor unit malfunctions, the sensor cannot collect the return air temperature, or it cannot determine whether the return air temperature collected by the sensor is accurate. For example, if the return air temperature sensor becomes detached, it cannot collect the return air temperature; or, if the sensor is displaced and moves near the air outlet of the indoor unit, the temperature it collects will be closer to the outlet air temperature. If the indoor unit is adjusted according to the outlet air temperature, it will lead to poor indoor comfort.

[0090] In another example, when there is a communication failure between the return air temperature sensor and the indoor unit, the return air temperature collected by the return air temperature sensor cannot be received.

[0091] In the above-mentioned scenarios, the function of the return air temperature sensor can be replaced by the method provided in the embodiments of this application, so as to prevent poor indoor comfort due to the inability to obtain the return air temperature in a timely manner.

[0092] Furthermore, when it is impossible to determine whether a return air sensor malfunction has occurred, the target return air temperature can be determined using the methods described in this application. The malfunction of the return air sensor can then be judged based on the target return air temperature. For example, if the temperature collected by the return air sensor can be obtained, but the collected return air temperature differs significantly from the target return air temperature, it indicates that the return air sensor may have malfunctioned or shifted. In this case, the function of the return air temperature sensor can be replaced by the methods provided in this application, and the cause of the malfunction can be identified promptly for timely handling.

[0093] Next, taking the scenario where the return air temperature of the indoor unit cannot be obtained as an example, the solution of this application embodiment will be described in detail. Figure 2 A flowchart illustrating the return air temperature determination method provided in this application embodiment. Figure 2 .like Figure 2 As shown in the embodiments of this application, the method for determining the return air temperature includes the following steps:

[0094] S201. When the return air temperature of the indoor unit cannot be obtained, the indoor unit valve of the indoor unit is closed, and the indoor unit fan is turned on to stop the indoor unit from exchanging heat.

[0095] Optionally, since the return air temperature cannot be obtained and the air conditioner cannot be controlled by the return air temperature, the room comfort will gradually decrease. In this embodiment of the application, the indoor unit fan can be adjusted to a larger setting (e.g., the maximum setting) so that the temperature around the indoor unit can be restored to room temperature as soon as possible, improve the efficiency of obtaining the target return air temperature, and thus achieve room temperature regulation as soon as possible to ensure indoor comfort.

[0096] S202. Determine the initial return air temperature as the first temperature of the indoor unit after the first time period following the cessation of heat exchange.

[0097] It should be noted that, since the temperature difference between various locations on (or around) the indoor unit is small after the indoor unit stops heat exchange, and is relatively close to the indoor temperature, in one example, the first temperature can be the temperature collected by a temperature sensor at any location on the indoor unit. For example, the first temperature may include, but is not limited to, one or more of the following: the temperature of the indoor unit's air inlet pipe and the temperature of its air outlet pipe.

[0098] S203. Control the indoor unit valve to open so that the indoor unit can start heat exchange.

[0099] It should be noted that the implementation method and principle of step S203 are described in step S102 of the embodiment shown in Figure 1, and will not be repeated here.

[0100] S204. Obtain the first operating parameters of the air conditioning system compressor during at least one sampling period during the heat exchange process of the indoor unit.

[0101] The specific type of the first working parameter is not particularly limited in the embodiments of this application. For example, the first working parameter includes, but is not limited to, one or more of the following: valve opening degree, compressor speed, compressor inlet temperature, outlet temperature, compressor displacement, inlet pressure and outlet pressure, etc.

[0102] S205. For each sampling duration, determine the first heat exchange of the indoor unit within the sampling duration based on the compressor's first operating parameters and the initial return air temperature.

[0103] It should be noted that the specific value of the sampling duration is not specifically limited in this application embodiment. For example, the sampling duration can be a fixed empirical value, such as 3 minutes, 5 minutes, etc.; or, the sampling duration can be determined according to the fan speed. For example, if the fan speed is low, it will take a long time to restore the room temperature, and if the fan speed is high, the sampling duration can be adjusted to a shorter duration.

[0104] Specifically, step S205 includes the following steps:

[0105] (1) Based on the first operating parameters of the compressor in each sampling period, determine the flow rate, liquid enthalpy and gas enthalpy of the compressor in each sampling period;

[0106] In practical applications, the compressor flow rate can be obtained within each sampling period by using the compressor's ten-coefficient algorithm based on the first operating parameter.

[0107] (2) Determine the total heat exchange of the compressor during each sampling period based on the flow rate, gas enthalpy and liquid enthalpy.

[0108] Specifically, the total heat exchange Q1 of the compressor during each sampling period can be obtained using the following formula:

[0109] Q1 = m*(h1 - h2)

[0110] Where m is the compressor flow rate of the compressor during a sampling period, h1 is the gas enthalpy value during a sampling period, and h2 is the liquid enthalpy value during a sampling period.

[0111] For example, it should be noted that the duration of each sampling can be different. For example, the first sampling duration can be 1 minute, the second sampling duration can be 2 minutes, and so on. Alternatively, the duration of each sampling can be the same. For example, all sampling durations can be 2 minutes.

[0112] Furthermore, the sampling durations can be continuous. For example, the first sampling duration can be 0-1 minute when the indoor unit starts heat exchange, and the second sampling duration can be 1-2 minutes when the indoor unit starts heat exchange; alternatively, the sampling durations can be spaced out, and the size of the interval is not limited in this embodiment. For example, taking a 1-minute interval between each sampling duration as an example, the first sampling duration can be 0-1 minute when the indoor unit starts heat exchange, the second sampling duration can be 3-4 minutes when the indoor unit starts heat exchange, and the third sampling duration can be 5-6 minutes when the indoor unit starts heat exchange.

[0113] (3) Determine the first heat exchange of the indoor unit within the sampling period based on the total heat exchange of the compressor in the air conditioning system.

[0114] Specifically, the weight value of the indoor unit in the air conditioning system is first determined based on the opening degree and / or diameter of the indoor unit's valve.

[0115] The total heat exchange is the total heat exchange of one or more indoor units corresponding to the compressor. For example, as shown in Figure 1(a), for a multi-split air conditioning system, one compressor may correspond to multiple indoor units. Taking a multi-split air conditioning system containing indoor unit 1, indoor unit 2, ..., indoor unit n as an example, if only indoor unit 1, indoor unit 2, and indoor unit 3 are running during the second time period, then the total heat exchange of the compressor during a certain sampling time period is the sum of the first heat exchange of indoor unit 1, indoor unit 2, and indoor unit 3.

[0116] Optionally, when there is only one indoor unit in the air conditioning system or only one indoor unit is running, the weight value of that indoor unit is 1.

[0117] Furthermore, since each indoor unit operates in a different state and has a different first heat exchange capacity, in this embodiment, the first heat exchange capacity of each indoor unit in each sampling period can be determined based on the total heat exchange of the compressor in each sampling period and the weight value of each indoor unit.

[0118] Specifically, in this embodiment, the first heat exchange capacity of the indoor unit is the product of the total heat exchange capacity of the compressor and the weight value of the indoor unit.

[0119] It should be noted that the method for determining the weight value is not limited in the embodiments of this application. For example, the weight value of the indoor unit in the air conditioning system can be determined according to the opening degree and / or diameter of the indoor unit valve of each indoor unit.

[0120] S206. Determine the total first heat exchange of the indoor unit during heat exchange based on the first heat exchange corresponding to at least one sampling duration.

[0121] Specifically, the total heat exchange of the indoor unit is the sum of the heat exchange of the first heat exchange within each usage period.

[0122] S207. Based on the target environmental information and the correspondence between the environmental information and the heat capacity value, determine the target heat capacity value corresponding to the target environmental information.

[0123] The target environmental information includes any one or more of the following: time information, meteorological information, and climate information.

[0124] The time information includes, but is not limited to, at least one or more of the following: seasonal information (e.g., spring, summer, autumn, winter, etc.), monthly information (e.g., January, February, etc.), time period information (e.g., morning, noon, afternoon, or evening, etc.), or specific time points or time ranges (e.g., 12:00 or 12:00-14:00, etc.); meteorological information includes, but is not limited to, at least one or more of the following: weather condition information (e.g., sunny, cloudy, rainy, snowy, etc.), temperature information, humidity information, air pressure information, wind force, etc.; climate information refers to the multi-year average condition of the atmosphere in a region, and the main climate elements include sunshine, temperature, and precipitation, etc. Climate information includes, for example, tropical monsoon climate, subtropical monsoon climate, temperate monsoon climate, temperate continental climate, alpine plateau climate, etc.

[0125] In one example, taking the target environmental information as time information, in this embodiment of the application, the current time information can be obtained. For example, if the current time information is used to indicate "the current time is 12:00 to 14:00 in summer", then the heat capacity value corresponding to 12:00 to 14:00 in summer can be determined from the preset correspondence between information and heat capacity value to be the target heat capacity value.

[0126] In the second example, taking meteorological information as the target environmental information, in this embodiment of the application, the current meteorological information can be obtained. For example, if the current meteorological information is used to indicate "the current weather is heavy snow or the temperature is ×× degrees Celsius, etc.", then the heat capacity value corresponding to the heavy snow weather can be determined as the target heat capacity value, or the heat capacity value corresponding to ×× degrees Celsius can be determined as the target heat capacity value.

[0127] In the third embodiment, taking climate information as the target environmental information as an example, in this embodiment, the climate information of the environment where the indoor unit is located can be obtained. For example, if the climate information is used to indicate that "the environment where the indoor unit is located is a tropical monsoon climate", then the heat capacity value corresponding to the tropical monsoon climate can be determined as the target heat capacity value.

[0128] In the fourth embodiment, the target environment can be any combination of the above-mentioned environmental information. For example, taking time information and meteorological information as the target environmental information, in this embodiment, the current time information and meteorological information can be obtained, and the target heat capacity value can be determined based on the current time information and meteorological information. As for the specific method, this embodiment will not elaborate on it one by one.

[0129] In this embodiment, the target heat capacity value is determined by the correspondence between environmental information and heat capacity value. This can fully consider the influence of environmental factors on the current heat capacity value, thereby improving the accuracy of the determined target return air temperature based on the heat capacity value, and thus ensuring the comfort of the area where the indoor unit is located.

[0130] S208. Determine the target return air temperature of the indoor unit based on the first total heat exchange, the target heat capacity, and the initial return air temperature.

[0131] It should be noted that step S208 is similar in implementation and principle to step S103 in the embodiment shown in Figure 1(b). For details, please refer to the above embodiment, which will not be repeated here.

[0132] Next, the method for determining the correspondence between information and heat capacity value will be described in detail with reference to specific embodiments. Figure 3 A flowchart illustrating the correspondence determination method provided in this application is shown in Figure 1. Figure 3 As shown, determining the correspondence between information and heat capacity values ​​specifically includes the following steps:

[0133] S301. When the return air temperature of the indoor unit can be obtained, the second total heat exchange of the indoor unit is obtained.

[0134] Specifically, step S301 above includes the following steps:

[0135] (1) When the return air temperature of the indoor unit can be obtained through the return air temperature sensor, the second operating parameter of the compressor in the air conditioning system is obtained;

[0136] On the one hand, for indoor units equipped with return air temperature sensors, step (1) means that the return air temperature sensor can accurately report the return air temperature it collects, that is, none of the following situations occur: return air temperature sensor failure, displacement or detachment, or communication failure between the return air temperature sensor and the main control chip of the indoor unit. At this time, the return air temperature can be obtained.

[0137] Specifically, at least one sampling duration is set, and a second operating parameter is obtained within each sampling duration. The operating parameter includes at least one of the following: compressor flow rate, liquid line enthalpy, and gas line enthalpy, etc.

[0138] (2) Determine the total heat exchange of the air conditioning system during each sampling period based on the second working parameters;

[0139] (3) Determine the second total heat exchange of the indoor unit within each sampling period based on the total heat exchange of the air conditioning system.

[0140] First, determine the weight value of the indoor unit in the air conditioning system based on the opening degree and / or diameter of the indoor unit's valve.

[0141] Furthermore, based on the total heat exchange and weight value within each sampling period of the air conditioning system, the second total heat exchange of the indoor unit within each sampling period is determined.

[0142] It should be noted that the method for determining the second total heat exchange in steps (2) and (3) is the same as that used in steps (3). Figure 2 The scheme for determining the first total heat exchange in steps S205 to S206 of the illustrated embodiment is similar and will not be repeated here.

[0143] S302. Based on the second total heat exchange, obtain the heat capacity value of the indoor unit corresponding to at least one environmental information.

[0144] Specifically, the heat capacity of the indoor unit during each sampling period can be obtained using the following formula:

[0145]

[0146] Where C is the heat capacity value within any sampling time, J is the second total heat exchange of the indoor unit within that sampling time, and ΔT is the sampling time.

[0147] It should be understood that, during the operation of the indoor unit, the heat capacity value corresponding to different environmental information (such as one or more combinations of different time periods, different meteorological information, and different climate information) can be obtained by following the same method.

[0148] It should be noted that the methods for determining environmental information such as meteorological information, time information, and climate information are not particularly limited in the embodiments of this application. For example, for some air conditioning systems with remote communication functions, they can communicate remotely with a time server to obtain time information, or they can communicate with a meteorological / climate server to obtain real-time meteorological / climate information.

[0149] In some alternative implementations, interactive air conditioning systems can obtain environmental information from terminal devices by interacting with them.

[0150] On the other hand, when the return air temperature cannot be collected using a return air temperature sensor, the heat capacity value cannot be obtained through the above steps S301 to S302 (for example, for an air conditioning system without a return air temperature sensor, the heat capacity value cannot be obtained based on the return air temperature). Therefore, in some embodiments, the heat capacity value of the area where the current indoor unit is located can be determined based on the heat capacity values ​​of other nearby areas. For example, in Figure 1(a), taking area 1 and area 2 as different areas within the same space, the difference in their return air temperatures is small. When indoor unit 1 is not equipped with a return air temperature sensor, if indoor unit 2 can normally obtain the return air temperature, the heat capacity value in area 2 can be obtained from indoor unit 2 as the heat capacity value corresponding to area 1. As for the specific implementation method, this application embodiment does not particularly limit it.

[0151] S303. Determine the correspondence between environmental information and heat capacity value based on the heat capacity value corresponding to at least one environmental information.

[0152] Optionally, after obtaining the heat capacity value corresponding to at least one environmental information, the corresponding relationship can be stored in the memory of the indoor unit.

[0153] As a concrete example, Figure 4 A flowchart illustrating the correspondence determination method provided in the embodiments of this application. Figure 2 .like Figure 4 As shown, determining the correspondence between information and heat capacity values ​​specifically includes the following steps:

[0154] S401. When the return air temperature of the indoor unit can be obtained, the operating parameters of the compressor are periodically acquired within at least one sampling period.

[0155] S402. Calculate the heat exchange of the indoor unit during each sampling period based on the operating parameters.

[0156] S403. Determine the total heat exchange of the indoor unit for at least one sampling period based on the heat exchange capacity.

[0157] It should be noted that the methods for determining the heat exchange capacity based on the compressor's operating parameters and the total heat exchange capacity based on the heat exchange capacity are described in the aforementioned embodiments and will not be repeated here.

[0158] S404. Determine whether the cumulative duration is less than the preset duration.

[0159] In this embodiment of the application, the sampling duration can be 5 minutes, that is, the total heat exchange of the indoor unit within these 5 minutes can be obtained every 5 minutes. Specifically, when running for 5 minutes, the total heat exchange of 0 to 5 minutes can be obtained, and when running for 10 minutes, the total heat exchange of 0 to 10 minutes can be obtained.

[0160] For example, taking the indoor unit as an example of running for any duration, the total heat exchange J2 corresponding to at least one sampling duration can be obtained by the following formula:

[0161] J2=J1+Q2*Δt

[0162] Where J1 is the total heat exchange after the first sampling period (e.g., 0 to 5 minutes), Q2 is the heat exchange during the second sampling period (e.g., 6 to 10 minutes), and Δt is the sampling period (i.e., 5 minutes).

[0163] It should be understood that the preset duration is not specifically limited in this application embodiment; for example, it can be a fixed value such as 30 minutes or 1 hour. Taking a preset duration of 30 minutes as an example, when the cumulative sampling duration is greater than or equal to 30 minutes, the data collection for one period is completed.

[0164] It should be noted that if the cumulative sampling duration is greater than or equal to the preset duration, then step S406 is executed; if the cumulative sampling duration is less than the preset duration, then step S401 is returned to continue obtaining the operating parameters of the air conditioning system.

[0165] S405. Calculate the heat capacity of the space where the indoor unit is located based on the total heat exchange volume and cumulative duration.

[0166] S406. Obtain current environmental information.

[0167] S407. Obtain the correspondence between the current environmental information and the heat capacity value.

[0168] S408. Determine whether the return air temperature can be accurately obtained at present.

[0169] Specifically, if the return air temperature can be obtained, the process continues to acquire the correspondence between other environmental information and heat capacity values, following steps S401 to S406. Alternatively, the current status of the correspondence acquisition can be assessed, and a decision can be made on whether to terminate the acquisition of correspondences based on the status. For example, if the current correspondence coverage is broad, and correspondences between any one or more types of environmental information (meteorological, temporal, and climatic information) and heat capacity values ​​have been acquired, the acquisition of correspondences can be terminated; or, if the number of correspondences exceeds a preset number, the acquisition of correspondences can be terminated.

[0170] Furthermore, if during this process it is determined that the return air temperature cannot be obtained or the obtained return air temperature is inaccurate, it indicates that the return air temperature sensor may have malfunctioned (e.g., detached or displaced), or that the communication between the return air temperature sensor and the main control chip of the indoor unit has failed. In this case, the acquisition of the correspondence between other time periods / other meteorological information and heat capacity values ​​can be stopped, and the process should be followed according to Figure 1 or... Figure 2In a corresponding embodiment, the target return air temperature of the indoor unit is obtained.

[0171] Figure 5 This is a schematic diagram of the return air temperature determination device provided in an embodiment of this application. Figure 5 As shown, the return air temperature determining device 500 includes:

[0172] The acquisition module 501 is used to acquire the initial return air temperature of the indoor unit of the air conditioning system when heat exchange stops, and the target environmental information of the environment in which the indoor unit is located; the determination module 502 is used to determine the first total heat exchange of the indoor unit during heat exchange based on the initial return air temperature; the acquisition module 501 is used to acquire the target heat capacity value corresponding to the target environmental information based on the target environmental information and the correspondence between the information and the heat capacity value; the determination module 502 is used to determine the target return air temperature of the indoor unit based on the first total heat exchange, the target heat capacity value, and the initial return air temperature.

[0173] In some embodiments, the acquisition module 501 is specifically used to: control the indoor unit valve of the indoor unit to close, and control the indoor unit fan to turn on, so that the indoor unit stops heat exchange; and take the first temperature of the indoor unit at a first time after the heat exchange stops as the initial return air temperature; wherein the first temperature includes at least one of the following: the indoor unit's air inlet pipe temperature and air outlet pipe temperature.

[0174] In some embodiments, the determining module 502 is specifically used to: control the indoor unit valve of the indoor unit to open so that the indoor unit can start heat exchange; acquire the first operating parameters of the air conditioning system compressor during at least one sampling period during the heat exchange process; for each sampling period, determine the first heat exchange of the indoor unit during the sampling period based on the first operating parameters of the compressor during the sampling period and the initial return air temperature; and determine the first total heat exchange of the indoor unit during heat exchange based on the first heat exchange corresponding to at least one sampling period.

[0175] In some embodiments, the acquisition module 501 is specifically used to: determine the first temperature of the indoor unit when heat exchange stops as the initial return air temperature when the return air temperature of the indoor unit cannot be acquired; wherein, the inability to acquire the return air temperature of the indoor unit includes at least one of the following: the indoor unit is not equipped with a return air temperature sensor; the return air temperature sensor of the indoor unit is faulty; or the communication between the return air temperature sensor and the indoor unit is faulty.

[0176] In some embodiments, the determining module 502 is further configured to: when the return air temperature of the indoor unit can be obtained through the return air temperature sensor, obtain the second total heat exchange of the indoor unit; based on the second total heat exchange, obtain the heat capacity value of the indoor unit corresponding to at least one environmental information; and based on the heat capacity value of the indoor unit corresponding to at least one environmental information, construct a correspondence between the environmental information and the heat capacity value.

[0177] In some embodiments, the determining module 502 is specifically used to: when the return air temperature of the indoor unit can be obtained through the return air temperature sensor, obtain the second operating parameters of the compressor in the air conditioning system; determine the total heat exchange of the air conditioning system based on the second operating parameters; and determine the second total heat exchange of the indoor unit based on the total heat exchange of the air conditioning system.

[0178] In some embodiments, the determining module 502 is specifically used to: determine the compressor flow rate, liquid pipe enthalpy, and gas pipe enthalpy based on the second operating parameters; and determine the total heat exchange of the air conditioning system based on the flow rate, gas pipe enthalpy, and liquid pipe enthalpy.

[0179] In some embodiments, the determining module 502 is specifically used to: determine the weight value of the indoor unit in the air conditioning system based on the opening degree and / or diameter of the indoor unit valve; and determine the second heat exchange capacity of the indoor unit based on the total heat exchange capacity of the air conditioning system and the weight value.

[0180] In some optional embodiments, the return air temperature determining device 500 may further include a storage module for storing data and / or instructions. The return air temperature determining device provided in this embodiment (such as the acquisition module 501 and the determining module 502 mentioned above) can be used to read the data and instructions in the storage module to implement the return air temperature determining method in the air conditioning system mentioned above. The implementation method and technical effect are similar, and will not be described again in this embodiment.

[0181] It should be noted that the acquisition module 501 in the above embodiments can actually be a receiver, used to receive information sent by other devices or measurement units, such as receiving the initial return air temperature sent by a temperature sensor, or receiving environmental information sent by a server or other terminal, etc. The acquisition module 501 can be implemented through a communication port.

[0182] In some alternative implementations, the determination module 502 can be implemented in software via a processing element or in hardware. For example, the determination module 502 can be a separately established processing element or integrated into a chip of the return air temperature determination device. Alternatively, it can be stored as program code in the storage module of the return air temperature determination device 500, for use by a processing element of the return air temperature determination device 500 to call and execute some or all of the functions of the determination module 502.

[0183] Furthermore, all or part of these processing elements can be integrated together or implemented independently. The module here can be an integrated circuit with signal processing capabilities. During implementation, each step of the above method or each of the above modules can be completed through integrated logic circuits in the hardware of the processor element or through software instructions.

[0184] For example, these modules can be one or more integrated circuits configured to implement the above return air temperature determination method. For example, one or more application-specific integrated circuits (ASICs), or one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs), etc. Furthermore, when one of the above modules is implemented through processing element scheduler code, the processing element can be the same processor, such as a central processing unit (CPU) or other processor capable of calling program code. Moreover, these modules can also be integrated together to implement a system-on-a-chip.

[0185] In some embodiments, this application also provides an indoor unit. Figure 6 This is a schematic diagram of the structure of the indoor unit provided in an embodiment of this application. Figure 6 As shown, the indoor unit 600 includes: a processor 601 and a memory 602.

[0186] The memory 602 stores a computer program; the processor 601 executes the computer program stored in the memory to implement the control method corresponding to the indoor unit in the above method embodiments.

[0187] In this embodiment, the memory 602 and the processor 601 are electrically connected directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines, such as bus 603. The memory 602 stores computer execution instructions that implement data access control methods, including at least one software functional module that can be stored in the memory in the form of software or firmware. The processor 601 executes various functional applications and data processing by running the software programs and modules stored in the memory.

[0188] The memory 602 may be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory stores programs, which are executed by the processor upon receiving execution instructions. Furthermore, the software programs and modules within the memory may include an operating system, which may include various software components and / or drivers for managing system tasks (e.g., memory management, storage device control, power management), and can communicate with various hardware or software components to provide an operating environment for other software components.

[0189] The processor 601 can be an integrated circuit chip with signal processing capabilities. The processor 601 described above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor.

[0190] It should be noted that the indoor unit provided in this embodiment can be used to perform the return air temperature determination method in the air conditioning system described above. Its implementation method and technical effect are similar, and will not be described again in this embodiment.

[0191] In some embodiments, this application also provides an air conditioning system, including: a compressor and at least one indoor unit, wherein the at least one indoor unit can be used to perform the return air temperature determination method in the air conditioning system described above.

[0192] Embodiments of this application also provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the return air temperature determination method in the above-described method embodiments.

[0193] Embodiments of this application also provide a computer program product, including a computer program that, when executed by a processor, is used to implement the return air temperature determination method in the above method embodiments.

[0194] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0195] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0196] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A method for determining the return air temperature in an air conditioning system, characterized in that, include: The initial return air temperature of the indoor unit of the air conditioning system when heat exchange stops is obtained, as well as the target environmental information of the environment in which the indoor unit is located, wherein the target environmental information includes one or more of time information, meteorological information, and climate information; Based on the initial return air temperature, determine the first total heat exchange of the indoor unit during heat exchange; Based on the target environmental information and the correspondence between the environmental information and the heat capacity value, the target heat capacity value corresponding to the target environmental information is obtained; The target return air temperature of the indoor unit is determined based on the first total heat exchange, the target heat capacity, and the initial return air temperature. The step of obtaining the initial return air temperature of the indoor unit of the air conditioning system when heat exchange stops includes: The indoor unit valve of the indoor unit is closed, and the fan of the indoor unit is turned on, so that the indoor unit stops heat exchange; The initial return air temperature is defined as the first temperature of the indoor unit after the first duration following the cessation of heat exchange. The first temperature includes at least one of the following: the air inlet pipe temperature and the air outlet pipe temperature of the indoor unit; The step of determining the first total heat exchange of the indoor unit during heat exchange based on the initial return air temperature includes: The indoor unit valve of the indoor unit is opened to allow the indoor unit to begin heat exchange. During the heat exchange process of the indoor unit, the first operating parameter of the compressor of the air conditioning system is obtained within at least one sampling time. For each sampling duration, the first heat exchange of the indoor unit during the sampling duration is determined based on the first operating parameters of the compressor during the sampling duration and the initial return air temperature. The first total heat exchange of the indoor unit during heat exchange is determined based on the first heat exchange corresponding to the at least one sampling duration.

2. The method for determining return air temperature according to claim 1, characterized in that, Determining the initial return air temperature of the indoor unit when heat exchange stops includes: When the return air temperature of the indoor unit cannot be obtained, the first temperature of the indoor unit when heat exchange stops is determined as the initial return air temperature. The inability to obtain the return air temperature of the indoor unit includes at least one of the following: The indoor unit is not equipped with a return air temperature sensor; The return air temperature sensor of the indoor unit is faulty; The communication between the return air temperature sensor and the indoor unit is faulty.

3. The method for determining return air temperature according to claim 1, characterized in that, Also includes: When the return air temperature of the indoor unit can be obtained through the return air temperature sensor, the second total heat exchange of the indoor unit is obtained; Based on the second total heat exchange, obtain the heat capacity value of the indoor unit corresponding to at least one environmental information; Based on the heat capacity value of the indoor unit corresponding to at least one environmental information, a correspondence between the environmental information and the heat capacity value is established.

4. The method for determining return air temperature according to claim 3, characterized in that, The step of obtaining the second total heat exchange of the indoor unit when the return air temperature of the indoor unit can be obtained through the return air temperature sensor includes: When the return air temperature of the indoor unit can be obtained through the return air temperature sensor, the second operating parameter of the compressor in the air conditioning system is obtained. The total heat exchange volume of the air conditioning system is determined based on the second operating parameters; The second total heat exchange of the indoor unit is determined based on the total heat exchange of the air conditioning system.

5. The method for determining return air temperature according to claim 4, characterized in that, Determining the total heat exchange volume of the air conditioning system based on the second operating parameters includes: Based on the second operating parameters, determine the compressor's flow rate, liquid enthalpy, and gas enthalpy. The total heat exchange of the air conditioning system is determined based on the flow rate, the enthalpy of the gas pipe, and the enthalpy of the liquid pipe.

6. The method for determining return air temperature according to claim 4, characterized in that, Determining the second total heat exchange of the indoor unit based on the total heat exchange of the air conditioning system includes: The weight value of the indoor unit in the air conditioning system is determined based on the opening degree and / or diameter of the indoor unit valve. The second total heat exchange of the indoor unit is determined based on the total heat exchange of the air conditioning system and the weight value.

7. A return air temperature determining device in an air conditioning system, characterized in that, include: The acquisition module is used to acquire the initial return air temperature of the indoor unit of the air conditioning system when heat exchange stops, and the target environmental information of the environment in which the indoor unit is located. The target environmental information includes one or more of time information, meteorological information, and climate information. The determining module is used to determine the first total heat exchange of the indoor unit during heat exchange based on the initial return air temperature; The acquisition module is used to acquire the target heat capacity value corresponding to the target environment information based on the target environment information and the correspondence between the environment information and the heat capacity value. The determining module is used to determine the target return air temperature of the indoor unit based on the first total heat exchange, the target heat capacity value, and the initial return air temperature. The acquisition module is used to acquire the initial return air temperature of the indoor unit of the air conditioning system when heat exchange stops, which refers to: The indoor unit valve of the indoor unit is closed, and the fan of the indoor unit is turned on, so that the indoor unit stops heat exchange; The initial return air temperature is defined as the first temperature of the indoor unit after the first duration following the cessation of heat exchange. The first temperature includes at least one of the following: the air inlet pipe temperature and the air outlet pipe temperature of the indoor unit; The determining module is used to determine the first total heat exchange of the indoor unit during heat exchange based on the initial return air temperature, which means: The indoor unit valve of the indoor unit is opened to allow the indoor unit to begin heat exchange. During the heat exchange process of the indoor unit, the first operating parameter of the compressor of the air conditioning system is obtained within at least one sampling time. For each sampling duration, the first heat exchange of the indoor unit during the sampling duration is determined based on the first operating parameters of the compressor during the sampling duration and the initial return air temperature. The first total heat exchange of the indoor unit during heat exchange is determined based on the first heat exchange corresponding to the at least one sampling duration.

8. An indoor unit, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program; when the processor executes the computer program, it implements the method for determining the return air temperature as described in any one of claims 1-6.

9. An air conditioning system, characterized in that, The air conditioning system includes a compressor and at least one indoor unit as described in claim 8.

10. A computer-readable storage medium, characterized in that, The readable storage medium stores a computer program; when the computer program is executed, it implements the return air temperature determination method as described in any one of claims 1-6.

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