Temperature measurement method, temperature measurement device, air conditioning system, and storage medium

Abstract

A temperature measurement method, a temperature measurement device (10), an air conditioning system (100), and a storage medium (300). The method comprises: acquiring temperature information from a plurality of temperature sensors; determining a target interface, wherein the target interface is, among a first interface, a second interface, a third interface and a fourth interface, an interface where a faulty temperature sensor is located or an interface where no temperature sensor is provided; and calculating the temperature of the target interface on the basis of a conservation relationship between the heat exchange amount of a medium and the heat exchange amount of a refrigerant and the temperature information from a plurality of temperature sensors at the interfaces other than the target interface.

Description

Temperature detection method, temperature detection device, air conditioning system and storage medium

[0001] Priority information

[0002] The present disclosure claims priority to and the benefit of the patent application with the patent application number "202411104361.0" filed on August 12, 2024 with the China National Intellectual Property Office, and incorporates it herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of temperature detection, and more particularly, to a temperature detection method, a temperature detection device, an air conditioning system and a non-volatile computer readable storage medium. BACKGROUND

[0004] In an air conditioning system, in order to ensure stable operation of the system, a temperature sensor is generally arranged at a heat exchange component to detect the temperature of each interface of the heat exchange component to control stable operation of the system. Once the temperature sensor fails, the system cannot obtain the temperature information of the position where the temperature sensor is located, which may cause abnormal shutdown or failure to start of the system, and there is an urgent need for a temperature detection method to obtain temperature information. SUMMARY

[0005] The embodiments of the present disclosure provide a temperature detection method, a temperature detection device, an air conditioning system and a non-volatile computer readable storage medium, which can calculate the temperature information of the interface to be detected by the failed or missing temperature sensor according to the information of the remaining temperature sensors in the case of failure or absence of a certain temperature sensor, can reduce the number of required temperature sensors, or avoid the problem of shutdown or failure to start caused by sensor failure, meet the use requirements of users, and greatly improve the user experience.

[0006] In an embodiment of the present disclosure, the air conditioning system includes a heat exchange component, the heat exchange component includes a first pipeline, a second pipeline and a plurality of temperature sensors, the first pipeline includes a first interface and a second interface, the first pipeline circulates refrigerant, the second pipeline includes a third interface and a fourth interface, the second pipeline circulates a medium that exchanges heat with the refrigerant, and the plurality of temperature sensors are arranged at at least three of the first interface, the second interface, the third interface and the fourth interface, respectively. The method includes: obtaining temperature information of the plurality of temperature sensors; determining a target interface, the target interface being an interface where a failed temperature sensor is located or an interface where no temperature sensor is arranged among the first interface, the second interface, the third interface and the fourth interface; and calculating a temperature of the target interface based on a conservation relationship between a heat exchange amount of the medium and a heat exchange amount of the refrigerant and the temperature information of the plurality of temperature sensors of the interfaces other than the target interface.

[0007] In some embodiments, the calculating the temperature of the target interface based on the conservation relationship between the heat exchange amount of the medium and the heat exchange amount of the refrigerant and the temperature information of the plurality of temperature sensors of the interface other than the target interface comprises: in a case where the target interface is the first interface or the second interface, calculating the heat exchange amount of the medium based on the temperatures of the temperature sensor of the third interface and the temperature sensor of the fourth interface, the heat exchange amount of the medium being equal to the heat exchange amount of the refrigerant; and calculating the temperature of the target interface based on the heat exchange amount of the refrigerant and the temperature information of the temperature sensor of the first reference interface, the first reference interface being the interface other than the target interface among the first interface and the second interface.

[0008] In some embodiments, the calculating the temperature of the target interface based on the heat exchange amount of the refrigerant and the temperature information of the temperature sensor of the first reference interface comprises: obtaining the flow of the first pipeline and the pressures of the first interface and the second interface; calculating an enthalpy difference between the first interface and the second interface based on the heat exchange amount of the refrigerant and the flow; calculating a first enthalpy value corresponding to the pressure of the first reference interface based on a preset mapping relationship, the preset mapping relationship comprising a mapping relationship between the pressure and the enthalpy value at each temperature, the preset mapping relationship corresponding to the temperature information of the temperature sensor of the first reference interface; calculating a second enthalpy value of the target interface based on the enthalpy difference and the first enthalpy value; and determining the temperature of the target interface based on the second enthalpy value and the pressure of the target interface.

[0009] In some embodiments, the calculating the temperature of the target interface based on the conservation relationship between the heat exchange amount of the medium and the heat exchange amount of the refrigerant and the temperature information of the plurality of temperature sensors of the interface other than the target interface comprises: in a case where the target interface is the third interface or the fourth interface, calculating the heat exchange amount of the refrigerant based on the temperatures of the temperature sensor of the first interface and the temperature sensor of the second interface, the heat exchange amount of the refrigerant being equal to the heat exchange amount of the medium; and calculating the temperature of the target interface based on the heat exchange amount of the medium and the temperature information of the temperature sensor of the second reference interface, the second reference interface being the interface other than the target interface among the third interface and the fourth interface.

[0010] In some embodiments, the air conditioning system comprises a water pump in communication with the second pipeline, and the calculating the temperature of the target interface based on the heat exchange amount of the medium and the temperature information of the temperature sensor of the second reference interface comprises: obtaining a flow rate of the second pipeline, the flow rate of the second pipeline being determined based on an operating power of the water pump; calculating a temperature difference between the third interface and the fourth interface based on the heat exchange amount of the medium and the flow rate of the second pipeline; and calculating the temperature of the target interface based on the temperature information of the second reference interface and the temperature difference between the third interface and the fourth interface.

[0011] In some embodiments, the temperature detection method further comprises: if the target interface is the first interface and the operating mode of the air conditioning system is a cooling mode, correcting the temperature of the target interface based on the temperature of the target interface, the temperature of the second interface, and a return gas temperature of a compressor of the air conditioning system; if the target interface is the first interface and the operating mode of the air conditioning system is a heating mode, correcting the temperature of the target interface based on the temperature of the target interface, the temperature of the second interface, and an exhaust gas temperature of the compressor of the air conditioning system; if the target interface is the second interface, correcting the temperature of the target interface based on a minimum value of the temperature of the target interface and the temperature of the second interface; if the target interface is the third interface and the operating mode of the air conditioning system is the cooling mode, correcting the temperature of the target interface based on the temperature of the target interface, the temperature of the fourth interface, and a return gas pressure of the compressor of the air conditioning system; if the target interface is the third interface and the operating mode of the air conditioning system is the heating mode, correcting the temperature of the target interface based on the temperature of the target interface, the temperature of the fourth interface, and an exhaust gas pressure of the compressor of the air conditioning system; and if the target interface is the fourth interface, correcting the temperature of the target interface based on a maximum value of the temperature of the target interface and the temperature of the third interface.

[0012] In some embodiments, the temperature detection method further comprises: controlling an operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface, and the fourth interface.

[0013] In some embodiments, the temperature detection method further comprises: controlling an operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface, and the fourth interface.

[0014] In some embodiments, the air conditioning system further comprises a flow control device for controlling the flow of the first pipe and a water pump in communication with the second pipe. The method of controlling the operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface and the fourth interface comprises: controlling the opening degree of the flow control device so that the supercooling degree of the heating of the refrigerant flowing out of the first pipe meets the set supercooling degree requirement and the superheating degree of the refrigeration meets the set superheating degree requirement; the supercooling degree and the superheating degree of the refrigerant flowing out of the first pipe are determined based on the temperature of the interface from which the refrigerant flows out of the first interface and the second interface; and controlling the operating power of the water pump so that the temperature difference between the third interface and the fourth interface is within the set temperature range.

[0015] In some embodiments, the temperature detection method further comprises: based on the operating condition of the air conditioning system, performing abnormality detection on the temperatures of the first interface, the second interface, the third interface and the fourth interface to obtain an abnormality detection result, the abnormality detection result comprising abnormality or normality; and controlling the operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface and the fourth interface, comprising: in the case that the abnormality detection result is normality, controlling the operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface and the fourth interface; and in the case that the abnormality detection result is abnormality, controlling the shutdown of the air conditioning system.

[0016] The temperature detection device of the embodiments of the present disclosure is used in an air conditioning system, which comprises a heat exchange assembly including a first pipe, a second pipe and a plurality of temperature sensors. The first pipe comprises a first interface and a second interface, and the first pipe circulates refrigerant. The second pipe comprises a third interface and a fourth interface, and the second pipe circulates medium that exchanges heat with the refrigerant. The plurality of temperature sensors are respectively arranged at at least three of the first interface, the second interface, the third interface and the fourth interface. The temperature detection device comprises an acquisition module, a determination module and a calculation module. The acquisition module is configured to acquire temperature information of the plurality of temperature sensors. The determination module is configured to determine a target interface, which is an interface where a temperature sensor that has failed is located or an interface where no temperature sensor is arranged among the first interface, the second interface, the third interface and the fourth interface. The calculation module is configured to calculate the temperature of the target interface based on the conservation relationship between the heat exchange amount of the medium and the heat exchange amount of the refrigerant and the temperature information of the plurality of temperature sensors of the interfaces other than the target interface.

[0017] The air conditioning system of the embodiment of the present disclosure comprises a processor, a memory and a computer program, wherein the computer program is stored in the memory and executed by the processor, and the computer program comprises instructions for executing the temperature detection method of any of the above-mentioned embodiments.

[0018] The non-volatile computer readable storage medium of the embodiment of the present disclosure comprises a computer program, which, when executed by a processor, causes the processor to execute the temperature detection method of any of the above-mentioned embodiments.

[0019] The temperature detection method, the temperature detection device, the air conditioning system and the storage medium of the embodiment of the present disclosure obtain temperature information of multiple temperature sensors, and calculate the temperatures of the first interface, the second interface, the third interface and the fourth interface based on the temperature information of the multiple temperature sensors. In the case that the temperature information of any interface cannot be obtained, the temperature information of the interface that cannot be obtained is calculated based on the temperature information of the interface that can be obtained, so as to avoid the problem of shutdown or failure to start caused by the failure of the temperature sensor of any interface or the failure to obtain the temperature information due to the absence of the temperature sensor, thereby meeting the use requirements of users and greatly improving the user experience.

[0020] Additional aspects and advantages of the embodiments of the present disclosure will be in part apparent and in part pointed out hereinafter in the description of the embodiments of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above-mentioned and / or additional aspects and advantages of the present disclosure will become apparent and easy to understand from the description of the embodiments of the present disclosure in conjunction with the accompanying drawings, in which:

[0022] FIG. 1 is a schematic structural diagram of an air conditioning system of a temperature detection method according to some embodiments of the present disclosure;

[0023] FIG. 2 is a schematic flow diagram of a temperature detection method according to some embodiments of the present disclosure;

[0024] FIG. 3 is a schematic flow diagram of a temperature detection method according to some embodiments of the present disclosure;

[0025] FIG. 4 is a schematic flow diagram of a temperature detection method according to some embodiments of the present disclosure;

[0026] FIG. 5 is a schematic flow diagram of a temperature detection method according to some embodiments of the present disclosure;

[0027] FIG. 6 is a schematic flow diagram of a temperature detection method according to some embodiments of the present disclosure;

[0028] FIG. 7 is a schematic flow diagram of a temperature detection method according to some embodiments of the present disclosure;

[0029] FIG. 8 is a schematic diagram of an air conditioning system structure of a temperature detection method according to an embodiment of the disclosure;

[0030] FIG. 9 is a schematic diagram of an air conditioning system structure of a temperature detection method according to an embodiment of the disclosure;

[0031] FIG. 10 is a flowchart of a temperature detection method according to an embodiment of the disclosure;

[0032] FIG. 11 is a flowchart of a temperature detection method according to an embodiment of the disclosure;

[0033] FIG. 12 is a flowchart of a temperature detection method according to an embodiment of the disclosure;

[0034] FIG. 13 is a schematic diagram of a module of a temperature detection device according to an embodiment of the disclosure;

[0035] FIG. 14 is a schematic diagram of an air conditioning system structure according to an embodiment of the disclosure;

[0036] FIG. 15 is a schematic diagram of a connection state of a non-volatile computer readable storage medium and a processor according to an embodiment of the disclosure. DETAILED DESCRIPTION

[0037] Embodiments of the disclosure are described in detail below with reference to the accompanying drawings. Examples of the embodiments are illustrated in the drawings, in which the same or similar reference numbers are used throughout to designate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are for the purpose of explaining the embodiments of the disclosure, and cannot be understood as limiting the embodiments of the disclosure.

[0038] For the convenience of understanding the disclosure, the terms appearing in the disclosure are explained as follows:

[0039] 1. Heat exchange: Heat exchange refers to the process of transferring heat energy from one system to another. This transfer is usually caused by a temperature difference and is accomplished through three methods: heat conduction, heat convection, and heat radiation.

[0040] 2. Heat exchanger: A heat exchanger is a device used to transfer or recover heat from a flowing medium to any other device. It is widely used in industrial production and daily life, such as automobile engines, air conditioning systems, etc. The basic working principle of a heat exchanger involves fluid flow, heat conduction, and convective heat transfer. In a heat exchanger, there are two different fluid flow channels, which are hot fluid and cold fluid. When the hot fluid flows through the heat conduction surface of the heat exchanger, its heat is transferred to the cold fluid through conduction. In addition, due to the temperature difference between the fluids, convection occurs, and the heat of the hot fluid is transferred to the cold fluid in the form of fluid.

[0041] 3. Pressure-Enthalpy Diagram: A pressure-enthalpy diagram is a curve plotting pressure versus enthalpy, commonly used in refrigerant analysis. In a pressure-enthalpy diagram, the vertical axis is the logarithm of the absolute pressure, lnp (or a logarithmic scale can be used to improve the accuracy of the low-pressure region), and the horizontal axis is the specific enthalpy, h. The meaning of the pressure-enthalpy curve can be summarized by a single point (critical point), two lines (saturated liquid line, saturated vapor line), three regions (liquid phase region, two-phase region, gas phase region), five states (subcooled liquid state, saturated liquid state, superheated vapor state, saturated vapor state, wet vapor state), and eight lines (isobaric line, isoenthalpic line, saturated liquid line, saturated vapor line, isodryness line, isentropic line, isospecific volume line, isotherm).

[0042] Currently, to ensure the normal operation of air conditioning systems, multiple temperature sensors are typically installed on the heat exchange components to monitor the refrigerant state and medium temperature. If any sensor malfunctions, the inability to obtain temperature information leads to unstable system operation and control, or even system shutdown. Repairing these sensors takes a considerable amount of time, rendering the air conditioner unusable in emergencies, significantly impacting user experience and potentially causing substantial financial losses. Furthermore, the more sensors present, the greater the probability of malfunction and the potential impact on users.

[0043] To address the aforementioned technical problems, this disclosure provides a temperature detection method.

[0044] Please refer to Figure 1. In one example, a temperature detection method of this disclosure is applied to an air conditioning system, which includes a heat exchange component P0, a compressor P5, a radiator P6, a four-way valve P7, and a water pump P8.

[0045] Optionally, the heat exchange assembly P0 includes a first pipe and a second pipe, and the heat exchange assembly is used to realize heat exchange between the refrigerant and the medium.

[0046] Optionally, the first pipe includes a first interface P1 and a second interface P2, and the first pipe is used to flow refrigerant.

[0047] Optionally, the second pipe includes a third interface P3 and a fourth interface P4, and the second pipe is used to circulate the heat exchange medium.

[0048] Optionally, temperature sensors are provided at at least three of the following interfaces: the first interface P1, the second interface P2, the third interface P3, and the fourth interface P4. A temperature sensor is a sensor capable of sensing temperature and converting it into a usable output signal, used to detect the temperature at at least three of these interfaces.

[0049] Optionally, the compressor P5 is used to lift the low-pressure gas to high-pressure gas. The compressor sucks in the low-temperature and low-pressure refrigerant gas from the suction pipe, and discharges the high-temperature and high-pressure refrigerant gas to the exhaust pipe after compression by the motor operation, thereby providing power for the refrigeration cycle.

[0050] Optionally, the radiator P6 is used to quickly transfer the heat of the refrigerant in the pipeline to the air near the pipeline.

[0051] Optionally, the four-way valve P7 is a control valve with four interfaces, which is used to control the flow direction and flow rate of the refrigerant.

[0052] Optionally, the water pump P8 is used to circulate and transport water or other liquid medium in the system, so as to realize heat transfer and exchange with the refrigerant.

[0053] It can be understood that the heat exchange assembly P0 is used to realize heat exchange between the refrigerant and the heat exchange medium, and the heat exchange assembly P0 comprises a first pipeline for flowing the refrigerant and a second pipeline for flowing the refrigerant. The two interfaces of the first pipeline in the heat exchange assembly are respectively the first interface P1 and the second interface P2, and the two interfaces of the second pipeline in the heat exchange assembly are respectively the third interface P3 and the fourth interface P4. In the heat exchange assembly P0, the heat exchange amount of the refrigerant and the heat exchange medium is conserved. Temperature sensors can be arranged at the four interfaces of the heat exchange assembly to detect the temperature of the refrigerant or the temperature of the medium. In the case that the temperature sensor at any interface fails, the temperature of the interface where the temperature sensor fails can be calculated based on the temperature information of the remaining three interfaces and in combination with the heat exchange amount conservation relationship of the refrigerant and the heat exchange medium.

[0054] The temperature detection method of the present disclosure will be described in detail as follows:

[0055] Referring to FIG. 2, the temperature detection method provided by the present disclosure can be realized by steps 011 to 013, which will be described in detail as follows.

[0056] Step 011: obtaining temperature information of a plurality of temperature sensors;

[0057] Optionally, a plurality of temperature sensors are arranged at at least three positions of the first interface and the second interface of the first pipeline, and the third interface and the fourth interface of the second pipeline, and the plurality of temperature sensors are used to detect the temperature at the at least three positions, respectively.

[0058] For example, the first interface, the second interface, the third interface and the fourth interface are all provided with temperature sensors; for another example, three of the first interface, the second interface, the third interface and the fourth interface are provided with temperature sensors.

[0059] Optionally, in the heat exchange assembly, a first pipe for flowing the refrigerant and a second pipe for flowing the medium for heat exchange with the refrigerant are provided. The refrigerant flows into the first pipe from a first interface and flows out from a second interface, the first interface being one of the two interfaces of the first pipe. The medium flows into the second pipe from a third interface and flows out from a fourth interface, the third interface being one of the two interfaces of the second pipe. When the refrigerant and the medium flow through the first pipe and the second pipe respectively, heat exchange occurs between the refrigerant and the medium due to the temperature difference between the two media.

[0060] Optionally, the number of temperature sensors at the interface where the temperature sensor is provided among the first interface to the fourth interface can be one or more, and the temperature at the interface where the temperature sensor is provided can be determined according to the temperature information of the temperature sensor at the interface, such as taking the average temperature of one or more temperature sensors at the interface as the temperature at the interface.

[0061] Step 012: determining a target interface, the target interface being the interface where the temperature sensor fails or the interface where the temperature sensor is not provided among the first interface, the second interface, the third interface and the fourth interface;

[0062] Optionally, the target interface is the interface where the temperature cannot be directly collected.

[0063] Specifically, in the case where the first interface, the second interface, the third interface and the fourth interface are all provided with temperature sensors, if the temperature sensor of a certain interface fails, the temperature of the interface where the temperature sensor fails cannot be obtained, and the interface where the temperature sensor fails is determined as the target interface. In the case where only three of the first interface, the second interface, the third interface and the fourth interface are provided with temperature sensors, the temperature of the interface where the temperature sensor is not provided cannot be obtained, and the interface where the temperature sensor is not provided is determined as the target interface.

[0064] Step 013: calculating the temperature of the target interface based on the conservation relationship between the heat exchange amount of the medium and the heat exchange amount of the refrigerant and the temperature information of the multiple temperature sensors of the interfaces other than the target interface.

[0065] Optionally, the heat exchange amount can be the heat transferred in the process of heat exchange between the medium and the refrigerant in the heat exchange assembly. Based on the law of conservation of energy, the heat exchange amount of the medium and the heat exchange amount of the refrigerant are conserved.

[0066] Specifically, the refrigerant flows through the first pipeline of the heat exchange assembly, the medium flows through the second pipeline of the heat exchange assembly, and heat transfer occurs between the refrigerant and the medium in the heat exchange assembly to achieve heat exchange. Due to the conservation of energy, the heat exchange amount of the refrigerant and the heat exchange amount of the medium exist a conservation relationship. The heat exchange amount of the refrigerant is the heat obtained or lost after flowing through the first pipeline, and the heat exchange amount of the refrigerant can be calculated according to the temperature information of the first interface and the second interface. The heat exchange amount of the medium is the heat obtained or lost after flowing through the second pipeline, and the heat exchange amount of the medium can be calculated according to the temperature information of the third interface and the fourth interface. The interfaces other than the target interface are provided with temperature sensors, and the temperature information of the interfaces can be obtained based on the temperature sensors, so the temperature information of the three interfaces can be obtained. Based on the temperature information of the three interfaces other than the target interface, the heat exchange amount of at least one of the refrigerant and the medium can be calculated. The heat exchange amount of the refrigerant and the heat exchange amount of the medium exist a conservation relationship, so the heat exchange amount of one of the refrigerant and the medium is calculated based on the conservation relationship, and the heat exchange amount of the other is also determined. In this way, the heat exchange amount of the pipeline where the target interface is located is known, and the temperature of the target interface can be calculated by combining the temperature information of another interface of the pipeline where the target interface is located other than the target interface.

[0067] In this way, the temperature sensors are provided at the first interface, the second interface, the third interface and the fourth interface, but in the case that the temperature sensor at one of the interfaces (i.e. the target interface) fails, the temperature information of the remaining interfaces (i.e. the interfaces other than the target interface) can be obtained based on the temperature sensors that do not fail, and the temperature information of the target interface can be calculated. In the case that the temperature sensor of the target interface fails, the temperature of each interface can still be obtained, which provides information support for the working condition control of the air conditioning system, improves the safety redundancy and stability of the system, avoids the problems of system shutdown and inability to start due to the failure of a certain temperature sensor, and improves the user experience.

[0068] In the case that only three of the first interface, the second interface, the third interface and the fourth interface are provided with temperature sensors, the temperature information of the three interfaces can be obtained based on the temperature sensors provided, and the temperature of the interface without the temperature sensor can be calculated. The number of temperature sensors is reduced, and the cost is reduced.

[0069] Please refer to FIG. 3, in some embodiments, the step 013 “calculating the temperature of the target interface based on the conservation relationship between the heat exchange amount of the medium and the heat exchange amount of the refrigerant and the temperature information of the multiple temperature sensors of the interfaces other than the target interface” is implemented by the step 0131 to the step 0132, which are specifically explained as follows.

[0070] In the case that the target interface is the first interface or the second interface, the heat exchange amount of the medium is calculated based on the temperature of the temperature sensor of the third interface and the temperature sensor of the fourth interface, and the heat exchange amount of the medium is equal to the heat exchange amount of the refrigerant.

[0071] Optionally, the target interface can be the first interface or the second interface. When the target interface is the first interface or the second interface, the temperature information of the third interface and the fourth interface can be obtained based on the temperature sensor.

[0072] Specifically, in the case where the target interface is the first interface or the second interface, it is explained that the heat exchange amount of the refrigerant cannot be calculated according to the temperature of the first interface and the temperature of the second interface. However, the temperature information of the third interface and the temperature information of the fourth interface can be obtained based on the third temperature sensor and the fourth temperature sensor, and the heat exchange amount of the medium can be calculated based on the temperature information of the third interface and the temperature information of the fourth interface. The calculation of the heat exchange amount of the medium can be: U2 = mcΔT

[0073] wherein U2 is the heat exchange amount of the medium, m is the mass of the medium flowing through the second pipeline for heat exchange, c is the specific heat capacity of the medium, and ΔT represents the absolute value of the difference between the temperature of the third interface and the temperature of the fourth interface.

[0074] Since the heat exchange amount of the refrigerant is equal to the heat exchange amount of the medium, in the case where the heat exchange amount of the medium is calculated, the heat exchange amount of the refrigerant can be obtained.

[0075] Step 0132: based on the heat exchange amount of the refrigerant and the temperature information of the temperature sensor of the first reference interface, calculate the temperature of the target interface, the first reference interface being the interface other than the target interface among the first interface and the second interface.

[0076] Specifically, since the first reference interface is the interface other than the target interface among the first interface and the second interface. The temperature of the first reference interface is provided with a temperature sensor and is not malfunctioning, and the temperature information of the first reference interface can be obtained based on the temperature sensor. The heat exchange amount of the refrigerant can be determined according to the temperature information of the first interface and the second interface, so in the case where the heat exchange amount of the refrigerant is known and the temperature information of the first reference interface is known, the temperature of the target interface can be calculated.

[0077] In this way, in the case where the target interface is the first interface or the second interface, first, the heat exchange amount of the medium is calculated based on the temperature of the third interface and the temperature of the fourth interface, and the heat exchange amount of the refrigerant is equal to the heat exchange amount of the medium. The interface among the first interface and the second interface from which the temperature information can be obtained is taken as the first reference interface, and the temperature of the target interface is calculated based on the heat exchange amount of the refrigerant. The conservation relationship between the heat exchange amount of the refrigerant and the heat exchange amount of the medium is utilized, and the temperature of the target interface is conveniently calculated based on the temperature information of the three interfaces that can be obtained, so that the temperature of the target interface is calculated in the case where the temperature of the first interface or the second interface cannot be obtained.

[0078] Please refer to FIG. 4, in some embodiments, the step 0132 "calculating the temperature of the target interface based on the heat exchange amount of the refrigerant and the temperature information of the temperature sensor of the first reference interface, the first reference interface being one of the first interface and the second interface, the target interface being the interface other than the first interface and the second interface" is implemented by the steps 01321 to 01325, which are explained in detail as follows.

[0079] Step 01321: obtaining the flow rate of the first pipeline and the pressure of the first interface and the second interface;

[0080] Optionally, the flow rate refers to the amount of fluid flowing through the effective cross section of the closed pipeline or open channel per unit time. If measured in volume, the flow rate is referred to as volume flow rate, and its standard unit is cubic meters per second (m 3 / s); if measured in mass, the flow rate is referred to as mass flow rate, and its standard unit is kilograms per second (kg / s). In the heat exchange process, the refrigerant flows through the first pipeline, and the flow rate of the first pipeline can be the mass flow rate or the volume flow rate of the refrigerant flowing through the first pipeline.

[0081] Optionally, to monitor the state of the refrigerant, pressure sensors can be arranged at the first interface and the second interface to obtain the pressure information of the first interface and the pressure information of the second interface.

[0082] Specifically, based on the pressure sensors arranged at the first interface and the second interface, the pressure information of the first interface and the pressure information of the second interface are obtained. The first pipeline is in communication with the compressor, so the flow rate of the first pipeline can be obtained by calculating the flow rate of the compressor. Based on the operating parameters of the compressor, the flow rate of the compressor can be calculated, and the flow rate of the first pipeline is obtained accordingly. Different calculation methods can be selected to obtain the flow rate of the compressor based on different working conditions.

[0083] For example, the calculation of the flow rate of the compressor can be: Qa = Vp x n x (1 - ηa) x 60 / 100

[0084] wherein Qa is the flow rate of the compressor, ηa is the overall efficiency of the compressor, n is the speed of the compressor, and Vp is the volume of the compressor.

[0085] For another example, the calculation method of the flow rate of the compressor can also be: Q = (P1 - P2) x V x k ÷ t

[0086] wherein Q represents the flow rate of the gas through the compressor per unit time; P1 represents the absolute pressure of the gas when the gas enters the compressor; P2 represents the absolute pressure of the gas when the gas is discharged from the compressor; V represents the volume of the gas through the compressor per unit time; t represents the unit time; and k is a temperature correction coefficient.

[0087] In some embodiments, the flow rate of the first pipe can be calculated based on the operating parameters of the compressor in combination with the AHRI ten-coefficient model. The AHRI ten-coefficient model is a volumetric compressor standard developed by the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) for evaluating the performance of compressors. The basic principle of the model involves the suction, compression, and discharge processes of the compressor. In the specific calculation, it uses ten parameters (i.e., "compressor ten coefficients") to describe the performance of the compressor, including performance parameters such as the cooling capacity, energy efficiency ratio, power consumption, and mass flow rate of the compressor.

[0088] For example, the way to calculate the flow rate of the compressor based on the AHRI ten-coefficient model can be: y = C1 + C2T e + C3T e + C4T e 2 + C5T e T c + C6T c 2 + C7T e 3 + C8T c T e 2 + C9T e T c 2 + C 10 T c 3

[0089] wherein y represents performance parameters such as the cooling capacity, energy efficiency ratio, power consumption, and mass flow rate of the compressor, Te is the evaporation temperature, and Tc is the condensation temperature. C1 to C10 are the compressor ten coefficients, which can be obtained based on the compressor model and design manual.

[0090] In this way, the flow rate of the compressor can be calculated based on the AHRI ten-coefficient model and the specific operating parameters of the compressor.

[0091] In some embodiments, a related sensor can also be arranged on the first pipe to obtain the flow rate of the first pipe.

[0092] Step 01322: Calculate the enthalpy difference between the first interface and the second interface based on the heat exchange amount and the flow rate of the refrigerant.

[0093] Optionally, enthalpy is an important state parameter in thermodynamics that characterizes the energy of a material system. The change in enthalpy can be used to analyze the energy exchange of a heat engine or an open system, and the change in enthalpy reflects the heat absorbed or released in the process. The enthalpy difference between the first interface and the second interface can be the absolute value of the difference between the enthalpy value of the refrigerant at the first interface and the enthalpy value of the refrigerant at the second interface.

[0094] Specifically, the refrigerant exchanges heat with the medium when flowing through the first pipeline. The heat exchange amount of the refrigerant can be reflected by the enthalpy change of the refrigerant at the first interface and the second interface. The heat exchange amount of the refrigerant is equal to the product of the flow rate of the refrigerant in the first pipeline and the enthalpy difference between the first interface and the second interface, as follows: U1 = AH * Q

[0095] Wherein, U1 is the heat exchange amount of the refrigerant, AH is the enthalpy difference of the refrigerant between the first interface and the second interface, and Q is the flow rate of the refrigerant.

[0096] In the case where the heat exchange amount of the refrigerant and the flow rate of the refrigerant are known, the enthalpy difference between the first interface and the second interface can be calculated.

[0097] Step 01323: based on a preset mapping relationship, a first enthalpy value corresponding to the pressure of the first reference interface is calculated, the preset mapping relationship includes the mapping relationship between the pressure and the enthalpy value at each temperature, and the preset mapping relationship corresponds to the temperature information of the temperature sensor of the first reference interface;

[0098] Optionally, the preset mapping relationship can be the mapping relationship between the pressure and the enthalpy value of the refrigerant in the system, and the pressure-enthalpy diagram can be drawn based on the mapping relationship between the pressure and the enthalpy value. In the pressure-enthalpy diagram, different curves and regions represent different combinations of pressure and enthalpy value, and these combinations correspond to a specific temperature. Based on the pressure-enthalpy diagram, the enthalpy value of the refrigerant can be determined under a given pressure.

[0099] Specifically, the preset mapping relationship reflects the mapping relationship between the pressure and the enthalpy value of the refrigerant, and the pressure and the enthalpy value correspond to each other to form a combination of pressure and enthalpy value, and the combination of pressure and enthalpy value corresponds to a specific temperature. Therefore, under the condition that the pressure of the first reference interface is given, the first enthalpy value of the refrigerant at the first interface can be determined.

[0100] Step 01324: based on the enthalpy difference and the first enthalpy value, a second enthalpy value of the target interface is calculated;

[0101] Specifically, the enthalpy difference between the target interface and the first reference interface is the absolute value of the difference, which represents the change amount of the enthalpy value between the first interface and the second interface. The enthalpy value change between the target interface and the first reference interface is determined by the operating condition of the air conditioning system. The enthalpy value of the target interface may be greater than or less than the enthalpy value of the second interface. Therefore, based on the enthalpy difference between the target interface and the first reference interface, combined with the specific operating condition of the air conditioning system, the second enthalpy value of the target interface can be calculated.

[0102] For example, in the case of refrigeration of an air conditioning system, the refrigerant flows into the first pipe from the target interface and out of the first reference interface. The refrigerant transfers heat to the medium in the first pipe, and heat exchange occurs. Then the enthalpy value of the refrigerant at the target interface is greater than that at the first reference interface. If the first enthalpy value is H1, the enthalpy difference between the first interface and the second interface is ΔH, and the second enthalpy value of the target interface is H2 = H1 - ΔH.

[0103] Step 01325: determining the temperature of the target interface based on the second enthalpy value and the pressure of the target interface.

[0104] Specifically, the second enthalpy value is the enthalpy value of the refrigerant at the target interface. In the pressure-enthalpy diagram, different curves and regions represent different combinations of pressure and enthalpy values, which in turn correspond to specific temperatures. Therefore, based on the combination of the second enthalpy value and the pressure of the target interface, combined with the mapping relationship between enthalpy value and pressure combination and temperature (or pressure-enthalpy diagram), the temperature corresponding to the combination of the second enthalpy value and the pressure of the target interface can be obtained, i.e. the temperature of the target interface.

[0105] In this way, given the heat exchange amount of the refrigerant and the temperature information of the first reference interface, the enthalpy value of the target interface is obtained through the relationship between the heat exchange amount of the refrigerant and the change in enthalpy value. Then, through the enthalpy value of the target interface and the pressure of the target interface, combined with the mapping relationship between the enthalpy value of the refrigerant in the air conditioning system and the pressure and temperature (or pressure-enthalpy diagram), the temperature of the target interface can be finally determined. In the case where the temperature of any interface of the first pipe cannot be obtained, based on the temperature information of the three interfaces that can be obtained, the temperature of the target interface is calculated.

[0106] Referring to FIG. 5, in some embodiments, step 013 “calculating the temperature of the target interface based on the conservation relationship between the heat exchange amount of the medium and the heat exchange amount of the refrigerant and the temperature information of the temperature sensors of the interfaces other than the target interface” is implemented by step 0133 to step 0134, which are described in detail below.

[0107] Step 0133: in the case where the target interface is the third interface or the fourth interface, calculating the heat exchange amount of the refrigerant based on the temperatures of the temperature sensors of the first interface and the second interface, the heat exchange amount of the refrigerant being equal to the heat exchange amount of the medium;

[0108] Specifically, in the case that the target interface is the third interface or the fourth interface, it is explained that the heat exchange amount of the medium cannot be calculated according to the temperature of the third interface and the temperature of the fourth interface. However, the temperature information of the first interface and the temperature information of the second interface can be obtained based on the first temperature sensor and the second temperature sensor. Based on the mapping relationship (or pressure-enthalpy diagram) of the temperature of the first interface and the corresponding pressure-enthalpy combination, the enthalpy value of the refrigerant at the first interface can be obtained. Based on the mapping relationship (or pressure-enthalpy diagram) of the temperature of the second interface and the corresponding pressure-enthalpy combination, the enthalpy value of the refrigerant at the second interface can be obtained. Therefore, in the case that the temperature of the refrigerant at one of the first interface and the second interface is obtained, the enthalpy difference of the refrigerant at the first interface and the second interface can be determined.

[0109] The heat exchange amount of the refrigerant can be calculated by the enthalpy difference of the refrigerant between the first interface and the second interface and the flow rate of the refrigerant: U1=ΔH*Q=(|H1-H2|)*Q

[0110] Wherein, U1 represents the heat exchange amount of the refrigerant, △H represents the enthalpy difference of the refrigerant between the first interface and the second interface, and Q represents the flow rate of the refrigerant. The heat exchange amount of the refrigerant is equal to the heat exchange amount of the medium, so the heat exchange amount of the medium can be obtained.

[0111] Step 0134: based on the heat exchange amount of the medium and the temperature information of the temperature sensor of the second reference interface, calculate the temperature of the target interface, the second reference interface being the interface other than the target interface among the third interface and the fourth interface.

[0112] Specifically, the second reference interface is the interface other than the target interface among the third interface and the fourth interface. The temperature information of the second reference interface can be obtained based on the temperature sensor. The heat exchange amount of the medium can be obtained based on the temperature of the third interface and the temperature of the fourth interface. Therefore, in the case that the heat exchange amount of the medium is known and the temperature information of the second reference interface is known, the temperature of the target interface can be calculated based on the heat exchange amount of the medium and the temperature of the second reference interface. U2=mcΔT

[0113] For example, if the heat exchange amount of the medium is U2, the temperature of the second reference interface is T2, and the temperature of the target interface is T1, the temperature of the target interface is: T1=T2-(U2 / mc)

[0114] Wherein, m is the mass of the medium passing through the second pipeline within a predetermined time, and c is the specific heat capacity of the medium. The mass m can be calculated by the flow rate of the medium. The flow rate of the medium can be calculated by the operating parameters of the water pump.

[0115] Thus, in the case that the target interface is the third interface or the fourth interface, the heat exchange amount of the medium is obtained by calculating the heat exchange amount of the refrigerant. The interface with temperature information available among the third interface and the fourth interface is taken as the second reference interface, and the temperature of the target interface is calculated based on the heat exchange amount of the medium. The conservation relationship between the heat exchange amount of the refrigerant and the heat exchange amount of the medium is ingeniously utilized, and the temperature of the target interface is conveniently calculated based on the temperature information of the three interfaces available.

[0116] Referring to FIG. 6, in some embodiments, the air conditioning system comprises a water pump in communication with the second pipeline, and the step 0134 of calculating the temperature of the target interface based on the heat exchange amount of the medium and the temperature information of the second reference interface is implemented by the steps 01341 to 01343, which are described in detail below.

[0117] Step 01441: obtaining the flow rate of the second pipeline, which is determined based on the operating power of the water pump;

[0118] Step 01442: calculating the temperature difference between the third interface and the fourth interface based on the heat exchange amount of the medium and the flow rate of the second pipeline;

[0119] Step 01443: calculating the temperature of the target interface based on the temperature information of the second reference interface and the temperature difference between the third interface and the fourth interface.

[0120] Specifically, the water pump is used to circulate the medium in the system, so as to realize the heat transfer and exchange between the medium and the refrigerant. The medium is delivered by the water pump and flows through the second pipeline to exchange heat with the refrigerant. The power of the water pump and the flow rate of the second pipeline have a mapping relationship, that is, the higher the power of the water pump, the greater the flow rate of the second pipeline. The flow rate of the second pipeline can be obtained based on the operating parameters of the water pump. Based on the flow rate of the second pipeline, the mass of the medium flowing through the second pipeline within a predetermined time can be calculated: m = pQt

[0121] wherein m is the mass of the medium flowing through the second pipeline, p is the density of the medium, Q is the volumetric flow rate of the second pipeline, and t is the predetermined time.

[0122] The heat exchange amount of the medium is equal to the product of the mass of the medium, the specific heat capacity of the medium, and the temperature difference between the third interface and the fourth interface, as shown below: U2 = mcAT

[0123] wherein U2 is the heat exchange amount of the medium, m is the mass of the medium flowing through the second pipeline to exchange heat, c is the specific heat capacity of the medium, and AT is the temperature difference between the third interface and the fourth interface. Based on the temperature difference between the third interface and the fourth interface and the temperature of the second reference interface, the temperature of the target interface can be calculated in combination with the specific operating conditions.

[0124] For example, in the case that the air conditioning system is in the refrigeration mode, the medium flows into the third interface of the second pipe and flows out of the fourth interface, and the target interface is the third interface. The medium obtains heat in the second pipe and thus its temperature rises. Based on the temperatures of the first interface and the second interface, the heat exchange amount of the refrigerant is calculated to be U1, and the heat exchange amount of the medium is calculated to be U2=U1. The flow rate of the second pipe is determined according to the operating parameters of the water pump, and is Q. The temperature of the second reference interface is T2, the specific heat capacity of the medium is c, and the density of the medium is p, and thus the temperature difference between the third interface and the fourth interface is: 2

[0125] The temperature of the target interface is T1=T2+AT.

[0126] In this way, in the case that the target interface is the third interface or the fourth interface, the heat exchange amount of the medium is obtained according to the heat exchange amount of the refrigerant. Then, based on the conversion relationship between the heat exchange amount of the medium and the temperatures of the third interface and the fourth interface, the heat exchange amount of the target interface is calculated. The temperature of the target interface is calculated based on the temperature information of the three interfaces and the conservation relationship between the heat exchange amount of the refrigerant and the heat exchange amount of the medium.

[0127] Referring to FIG. 7, in some embodiments, the temperature detection method further comprises steps 015 to 020, which are described in detail as follows.

[0128] Step 015: If the target interface is the first interface and the working mode of the air conditioning system is the refrigeration mode, the temperature of the target interface is corrected based on the temperature of the target interface, the temperature of the second interface, and the back gas temperature of the compressor of the air conditioning system.

[0129] Specifically, referring to FIG. 8, in the case that the target interface is the first interface and the working mode of the air conditioning system is the refrigeration mode, the refrigerant flows into the second interface and flows out of the first interface, and heat exchange occurs in the heat exchange assembly, so the temperature of the target interface should not be lower than the temperature of the second interface. After the refrigerant flows out of the first interface, it flows into the back gas port of the compressor, and thus the temperature of the first interface should not be higher than the back gas temperature of the back gas port of the compressor. Therefore, the temperature of the target interface can be corrected based on the size relationship among the temperature of the target interface, the temperature of the second interface, and the back gas temperature. First, the temperature of the target interface can be corrected for the first time based on the temperature of the target interface and the temperature of the second interface, and the temperature of the target interface is the maximum value of the temperature of the target interface and the temperature of the second interface. Second, the temperature of the target interface can be corrected for the second time based on the temperature after the first correction and the back gas temperature, and the temperature of the target interface can be corrected to the minimum value of the temperature after the first correction and the back gas temperature.

[0130] For example, in the case that the air conditioning system is in the cooling mode, if the temperature of the target interface is T2B, the temperature of the second interface is T2, and the return air temperature is Th, the temperature of the target interface can be corrected as T2B = min[max(T2B, T2), Th].

[0131] Step 016: If the target interface is the first interface and the working mode of the air conditioning system is the heating mode, the temperature of the target interface is corrected based on the temperature of the target interface, the temperature of the second interface, and the discharge temperature of the compressor of the air conditioning system.

[0132] Specifically, referring to FIG. 9, in the case that the target interface is the first interface and the working mode of the air conditioning system is the heating mode, the refrigerant flows in from the first interface and flows out from the second interface, and the refrigerant is cooled in the heat exchange assembly, so the temperature of the first interface should not be lower than the temperature of the second interface. The discharge port of the refrigerant compressor flows into the target interface, and the temperature of the first interface should not be higher than the discharge temperature of the discharge port of the compressor. Therefore, based on the size relationship between the temperature of the target interface, the temperature of the second interface, and the discharge temperature, the temperature of the target interface can be corrected. First, the temperature of the target interface is corrected based on the temperature of the target interface and the temperature of the second interface, and the temperature of the target interface is the maximum of the temperature of the target interface and the temperature of the second interface. Second, the temperature of the target interface is corrected based on the temperature after the first correction and the discharge temperature, and the temperature of the target interface can be corrected as the minimum of the temperature after the first correction and the discharge temperature.

[0133] For example, in the case that the air conditioning system is in the cooling mode, if the temperature of the target interface is T2B, the temperature of the second interface is T2, and the return air temperature is Th, the temperature of the target interface can be corrected as T2B = min[max(T2B, T2), Th].

[0134] Step 017: If the target interface is the second interface, the temperature of the target interface is corrected based on the minimum of the temperature of the target interface and the temperature of the second interface.

[0135] Specifically, referring to FIG. 8 and FIG. 9, since the target interface is the second interface, in the case that the air conditioning system is in the cooling mode, the refrigerant flows in from the second interface and flows out from the first interface, and the refrigerant is heated in the heat exchange assembly, so the temperature of the second interface should not be higher than the temperature of the first interface. In the case that the air conditioning system is in the heating mode, the refrigerant flows in from the first interface and flows out from the second interface, and the refrigerant is heated in the heat exchange assembly, so the temperature of the second interface should not be higher than the temperature of the first interface. In summary, no matter whether the air conditioning system is in the cooling mode or the heating mode, the temperature of the second interface should not be higher than the temperature of the first interface, so the temperature of the target interface can be corrected when the target interface is the second interface, and the temperature of the target interface can be corrected as the minimum of the temperature of the target interface and the temperature of the first interface.

[0136] For example, in the case that the air conditioning system is in the cooling mode or the heating mode, if the temperature of the target interface is T2 and the temperature of the first interface is T2B, the temperature of the target interface can be corrected as: T2 = min(T2, T2B).

[0137] Step 018: If the target interface is the third interface and the working mode of the air conditioning system is the cooling mode, the temperature of the target interface is corrected based on the temperature of the target interface, the temperature of the fourth interface, and the back pressure of the compressor of the air conditioning system.

[0138] Specifically, referring to FIG. 8, the heat exchange medium flows in from the fourth interface and flows out from the third interface. In the case that the target interface is the third interface and the working mode of the air conditioning system is the cooling mode, the heat exchange medium dissipates heat in the heat exchange assembly, so the temperature of the third interface should not be higher than the temperature of the fourth interface. In order to ensure that the refrigerant is in a normal state, the temperature of the third interface should not be lower than the evaporation temperature of the refrigerant. The evaporation temperature of the refrigerant can be obtained according to the back pressure of the refrigerant and the corresponding pressure-enthalpy diagram, so the temperature of the third interface can be corrected based on the temperature of the target interface, the temperature of the fourth interface, and the back pressure of the compressor of the air conditioning system. First, the temperature of the target interface is corrected for the first time based on the temperature of the fourth interface, and the temperature of the target interface is the minimum of the temperature of the target interface and the temperature of the fourth interface. Second, the temperature of the target interface is corrected for the second time based on the temperature value after the first correction and the evaporation temperature of the refrigerant, and the temperature of the target interface can be corrected to the maximum of the temperature value after the first correction and the evaporation temperature of the refrigerant.

[0139] For example, in the case that the air conditioning system is in the cooling mode, if the temperature of the target interface is Twout, the temperature of the fourth interface is Twin, and the evaporation temperature corresponding to the back pressure of the refrigerant is Te, the temperature of the target interface can be corrected as: Twout = max[min(Twout, Twin), Te].

[0140] Step 019: If the target interface is the third interface and the working mode of the air conditioning system is the heating mode, the temperature of the target interface is corrected based on the temperature of the target interface, the temperature of the fourth interface, and the discharge pressure of the compressor of the air conditioning system.

[0141] Specifically, referring to FIG. 9, the heat exchange medium flows in from the fourth interface and flows out from the third interface. In the case that the target interface is the third interface and the working mode of the air conditioning system is the heating mode, the heat exchange medium absorbs heat in the heat exchange assembly, and therefore the temperature of the third interface should not be lower than the temperature of the fourth interface. In order to ensure that the refrigerant is in a normal state, the temperature of the third interface should not be higher than the condensing temperature of the refrigerant. The condensing temperature of the refrigerant can be obtained according to the discharge pressure of the refrigerant and the corresponding pressure-enthalpy diagram, and therefore the temperature of the third interface can be corrected based on the temperature of the target interface, the temperature of the fourth interface, and the discharge pressure of the compressor of the air conditioning system. First, the temperature of the target interface is corrected for the first time based on the temperature of the fourth interface, and the temperature of the target interface is the maximum of the temperature of the target interface and the temperature of the fourth interface. Second, the temperature of the target interface is corrected for the second time based on the temperature after the first correction and the condensing temperature of the refrigerant, and the temperature of the target interface can be corrected to the minimum of the temperature after the first correction and the evaporating temperature of the refrigerant.

[0142] For example, in the case that the air conditioning system is in the heating mode, if the temperature of the target interface is Twout, the temperature of the fourth interface is Twin, and the condensing temperature corresponding to the discharge pressure of the refrigerant is Tc, the temperature of the target interface can be corrected as follows: Twout = max[min(Twout, Twin), Tc].

[0143] Step 020: If the target interface is the fourth interface, the temperature of the target interface is corrected based on the maximum of the temperature of the target interface and the temperature of the third interface.

[0144] Specifically, referring to FIG. 8, the heat exchange medium flows in from the fourth interface and flows out from the third interface. In the case that the target interface is the fourth interface and the air conditioning system is in the cooling mode, the heat exchange medium releases heat in the heat exchange assembly, and therefore the temperature of the third interface should not be higher than the temperature of the fourth interface. Based on the temperature of the fourth interface and the calculated temperature of the target interface, the temperature of the target interface can be corrected, and the temperature of the target interface can be corrected to the maximum of the temperature of the target interface and the temperature of the fourth interface.

[0145] For example, in the case that the air conditioning system is in the cooling mode, if the temperature of the target interface is Twin and the temperature of the third interface is Twout, the temperature of the target interface can be corrected as follows: Twin = max(Twin, Twout).

[0146] Referring to FIG. 9, in the case that the target interface is the fourth interface and the air conditioning system is in the heating mode, the heat exchange medium absorbs heat in the heat exchange assembly, and therefore the temperature of the third interface should not be lower than the temperature of the fourth interface. Based on the temperature of the fourth interface and the calculated temperature of the target interface, the temperature of the target interface can be corrected, and the temperature of the target interface can be corrected to the minimum of the temperature of the target interface and the temperature of the fourth interface.

[0147] For example, in the case of the air conditioning system in heating mode, if the target interface temperature is Tw in and the third interface temperature is Tw out, the target interface temperature can be corrected as follows: Tw in = max(Tw in, Tw out).

[0148] In this way, based on the physical relationship between the temperatures measured by the various temperature sensors in the air conditioning system, the calculated target interface temperature can be corrected to obtain a more accurate target interface temperature.

[0149] Referring to FIG. 10, in some embodiments, the temperature detection method further includes step 014 "controlling the operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface, and the fourth interface".

[0150] Alternatively, the operating condition can be the working state of the air conditioning system when it is in operation, including the output power, working mode, operating efficiency, etc. of the device. For example, the air conditioning system is in cooling or heating mode, and the set temperature is how many degrees Celsius, etc.

[0151] Specifically, the condition control is a dynamic process that needs to be constantly fed back and adjusted. By monitoring the changes in the temperatures of the various interfaces in real time and executing the corresponding control strategy, precise control of the operating condition of the device can be achieved. According to the working state of the air conditioning system, the temperatures of the first interface, the second interface, the third interface, and the fourth interface are obtained. The temperatures of the various interfaces can reflect whether the current operating parameters can meet the set operating condition. Based on the obtained temperature information, the control strategy to be executed is determined to achieve control of the operating condition of the air conditioning system. For example, when the temperature of the first interface or the second interface exceeds the set threshold, it may mean that the refrigerant state of the interface is not in the required stable state for control, at which point the interface temperature can be controlled to be within the set threshold by adjusting the opening of the expansion valve and adjusting the flow.

[0152] For example, in the case of the air conditioning system in cooling mode and the set temperature of 22°C, based on the temperatures of the first interface, the second interface, the third interface, and the fourth interface, it can be determined whether the current operating parameters of the air conditioning system can meet the operating condition of the set temperature of 22°C. If not, the operating condition of the air conditioning system can be controlled by adjusting the opening of the expansion valve, adjusting the output power, etc.

[0153] In this way, based on the operating condition of the air conditioning system, by monitoring the temperatures of the various interfaces in real time and based on the temperatures of the various interfaces, it can be determined what adjustments need to be made to the current operating parameters, and the corresponding control strategy can be executed to achieve precise control of the operating condition of the device.

[0154] Referring to FIG. 11, in some embodiments, the air conditioning system further comprises a flow control device for controlling the flow of the first pipe and a water pump in communication with the second pipe. The step 014 of "controlling the operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface and the fourth interface" is implemented by the step 0141 and the step 0142, which are described below in detail.

[0155] The step 0141 is to control the opening degree of the flow control device so that the supercooling degree of the heating of the refrigerant flowing out of the first pipe meets the set supercooling degree requirement and the superheating degree of the refrigeration meets the set superheating degree requirement. The supercooling degree and the superheating degree of the refrigerant flowing out of the first pipe are determined based on the temperature of the interface from which the refrigerant flows out of the first interface and the second interface.

[0156] Optionally, the state of the refrigerant being continuously cooled below the saturation temperature under the condition of constant pressure is called supercooling, and the temperature is called supercooling temperature. The difference between the supercooling temperature and the saturation temperature is the supercooling degree. Controlling the supercooling degree of the refrigerant is of great significance in the refrigeration system.

[0157] Optionally, the difference between the superheating temperature and the saturation temperature of the refrigerant under the same evaporation pressure in the refrigeration cycle is called superheating degree. If the superheating degree does not meet the set requirement, the system efficiency is reduced and the operating cost is increased.

[0158] Specifically, the supercooling degree and the superheating degree of the refrigerant can be determined based on the temperature of the interface from which the refrigerant flows out of the first interface and the second interface. The supercooling degree of the refrigerant is the difference between the temperature of the interface from which the refrigerant flows out and the saturation temperature of the refrigerant at the pressure of the outflow interface. In a specific operating condition, if the supercooling degree is low, it is not conducive to the efficient operation of the air conditioning system, and it may even cause damage to some components. By adjusting the opening degree of the flow control device, the flow of the refrigerant in the second pipe can be controlled, and thus the control of the supercooling degree and the superheating degree of the refrigerant can be achieved.

[0159] For example, in the case of heating of the outdoor unit, the supercooling degree of the refrigerant at the interface where the refrigerant flows out of the first pipe needs to be controlled to 5℃. At this time, based on the temperature of the refrigerant outflow interface obtained, it can be determined whether the supercooling degree of the refrigerant reaches 5℃. If not, the opening degree of the flow control device is adjusted, the opening degree of the expansion valve is reduced to reduce the flow of the refrigerant, and the supercooling degree is increased.

[0160] The step 0142 is to control the operating power of the water pump so that the temperature difference between the third interface and the fourth interface is within the set temperature range.

[0161] Optionally, the set temperature range can be a temperature range in which the temperature difference of the medium at the third interface and the fourth interface is located. In the case that the temperature difference at the third interface and the fourth interface is within the set temperature range, the heat exchange assembly operates in the optimal working state, and the operation efficiency of the system is also in a higher state.

[0162] Specifically, the water pump is connected with the second pipeline in communication to control the flow of the medium in the second pipeline. In the case that the aperture, friction coefficient and the like of the second pipeline are fixed, there is a mapping relationship between the power of the water pump and the flow of the second pipeline, and the higher the power of the water pump, the greater the flow of the second pipeline. In order to realize that the heat exchange assembly operates in the optimal working state, it is necessary to adjust the power of the water pump to adjust the temperature difference at the third interface and the fourth interface. If the temperature difference at the third interface and the fourth interface is too small, it indicates that the flow of the second pipeline is too large. At this time, the power of the water pump needs to be reduced to reduce the flow of the second pipeline. If the temperature difference at the third interface and the fourth interface is too large, it indicates that the heat exchange demand cannot be well met at this time. At this time, the power of the water pump should be increased to increase the flow of the second pipeline to realize better heat exchange.

[0163] In this way, based on the temperatures of the first interface, the second interface, the third interface and the fourth interface, the temperature difference of the medium can be determined. The opening of the flow control device can be adjusted to control the supercooling degree of the refrigerant, and the power of the water pump can be adjusted to control the temperature difference of the medium at the third interface and the fourth interface. Based on the temperature information of each interface, the operation condition of the air conditioning system is controlled to make the air conditioning system in a stable state and the overall operation efficiency in a higher state.

[0164] Referring to FIG. 12, in some embodiments, the step 014 "controlling the operation condition of the air conditioning system based on the operation condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface and the fourth interface" is implemented by the steps 0143 to 0145, which are specifically described as follows.

[0165] The step 0143: based on the operation condition of the air conditioning system, performing abnormality detection on the temperatures of the first interface, the second interface, the third interface and the fourth interface to obtain an abnormality detection result, the abnormality detection result including abnormality or normality.

[0166] Optionally, the abnormality detection can be detection on whether the temperatures of the first interface, the second interface, the third interface and the fourth interface are within a reasonable range of constraint. In the case that the temperature of the interface is not within the reasonable range, it is determined that the abnormality detection result is abnormal, and in the case that the temperature of the interface is within the reasonable range, it is determined that the abnormality detection result is normal.

[0167] Specifically, since the calculated temperature information can not be accurate, it is necessary to perform abnormality detection on the temperatures of the first interface, the second interface, the third interface and the fourth interface to ensure that the obtained temperature information is reliable. In the heat exchange assembly, the heat exchange between the refrigerant and the medium is based on the temperature difference between the refrigerant and the medium. Under different operating conditions, the temperature difference between the refrigerant and the medium is different. In the refrigeration mode, the temperature of the refrigerant in the heat exchange assembly is higher than the temperature of the medium, and the refrigerant transfers heat to the medium. After the refrigerant flows through the first pipeline, the temperature decreases, and after the medium flows through the second pipeline, the temperature increases, and the temperature of the refrigerant flowing out of the interface is higher than the temperature of the medium flowing out of the interface. In the heating mode, the temperature of the refrigerant in the heat exchange assembly is lower than the temperature of the medium, and the medium transfers heat to the refrigerant. After the refrigerant flows through the first pipeline, the temperature increases, and after the medium flows through the second pipeline, the temperature decreases, and the temperature of the medium flowing out of the interface is higher than the temperature of the refrigerant flowing out of the interface.

[0168] For example, in the refrigeration state of the air conditioning system, the first interface is the inlet of the first pipeline, the second interface is the outlet of the first pipeline, the third interface is the inlet of the second pipeline, the fourth interface is the outlet of the second pipeline, and the target interface is the fourth interface. The temperature difference of the medium is controlled to be within 5°C. If the temperature of the second interface is 40°C and the temperature of the third interface is 23°C, the temperature of the fourth pipeline should be higher than the temperature of the third interface and lower than the temperature of the second interface. Therefore, in the case that the calculated temperature of the fourth interface is less than 23°C, it can be determined that the abnormality detection result is abnormal; in the case that the calculated temperature of the fourth interface is greater than 23°C and less than or equal to 28°C, it can be determined that the abnormality detection result is normal.

[0169] Step 014 "controlling the operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface and the fourth interface" is realized by step 0145 to step 0146, which will be described in detail below.

[0170] Step 0144: in the case that the abnormality detection result is normal, controlling the operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface and the fourth interface;

[0171] Specifically, in the case that the abnormality detection result is normal, it indicates that the obtained temperature information of each interface is reliable, and the air conditioning system can be controlled based on the temperature information of each interface in combination with the operating condition of the air conditioning system.

[0172] Step 0145: in the case that the abnormality detection result is abnormal, controlling the shutdown of the air conditioning system.

[0173] Specifically, in the case that the abnormality detection result is abnormal, it is indicated that the obtained temperature information of each interface is unreliable and is insufficient to support the operation of the air conditioning system. In order to protect the heat exchange component and other components of the air conditioning system, a shutdown operation is performed on the air conditioning system.

[0174] In this way, by performing abnormality detection on the temperatures of the first interface, the second interface, the third interface and the fourth interface, it can be determined whether the temperature information is reliable. In the case that the temperature information is reliable, the continuous and stable operation of the system is realized based on the obtained temperature information. In the case that the temperature information is unreliable, a shutdown operation is performed to protect the heat exchange component and other components of the air conditioning system.

[0175] Referring to FIG. 13, in order to better implement the temperature detection method of the embodiments of the present disclosure, the embodiments of the present disclosure further provide a temperature detection device 10. The temperature detection device 10 can include an acquisition module 11, a determination module 12 and a calculation module 13. The acquisition module 11 is configured to acquire temperature information of a plurality of temperature sensors; the determination module 12 is configured to determine a target interface, the target interface being an interface where a temperature sensor that fails or an interface where no temperature sensor is arranged among the first interface, the second interface, the third interface and the fourth interface; and the calculation module 13 is configured to calculate a temperature of the target interface based on a conservation relationship between a heat exchange amount of a medium and a heat exchange amount of refrigerant and temperature information of a plurality of temperature sensors of an interface other than the target interface.

[0176] In some embodiments, the calculation module 13 is further configured to, in the case that the target interface is the first interface or the second interface, calculate the heat exchange amount of the medium based on temperatures of the temperature sensor of the third interface and the temperature sensor of the fourth interface, the heat exchange amount of the medium being equal to the heat exchange amount of the refrigerant; and calculate the temperature of the target interface based on the heat exchange amount of the refrigerant and temperature information of the temperature sensor of the first reference interface, the first reference interface being an interface other than the target interface among the first interface and the second interface.

[0177] In some embodiments, the calculation module 13 is further configured to acquire a flow rate of the first pipeline and pressures of the first interface and the second interface; calculate an enthalpy difference between the first interface and the second interface based on the heat exchange amount of the refrigerant and the flow rate; calculate a first enthalpy value corresponding to the pressure of the first reference interface based on a preset mapping relationship, the preset mapping relationship including a mapping relationship between pressure and enthalpy value at each temperature, the preset mapping relationship corresponding to the temperature information of the temperature sensor of the first reference interface; calculate a second enthalpy value of the target interface based on the enthalpy difference and the first enthalpy value; and determine the temperature of the target interface based on the second enthalpy value and the pressure of the target interface.

[0178] In some embodiments, the computing module 13 is further configured to, in the case that the target interface is the third interface or the fourth interface, calculate the heat exchange amount of the refrigerant based on the temperatures of the temperature sensor of the first interface and the temperature sensor of the second interface, the heat exchange amount of the refrigerant being equal to the heat exchange amount of the medium; and calculate the temperature of the target interface based on the heat exchange amount of the medium and the temperature information of the temperature sensor of the second reference interface, the second reference interface being the interface other than the target interface among the third interface and the fourth interface.

[0179] In some embodiments, the air conditioning system comprises a water pump in communication with the second pipeline, and the computing module 13 is further configured to obtain the flow rate of the second pipeline, the flow rate of the second pipeline being determined based on the operating power of the water pump; calculate the temperature difference between the third interface and the fourth interface based on the heat exchange amount of the medium and the flow rate of the second pipeline; and calculate the temperature of the target interface based on the temperature information of the second reference interface and the temperature difference between the third interface and the fourth interface.

[0180] In some embodiments, the temperature detection device 10 further comprises a correction module 14. The correction module 14 is configured to, if the target interface is the first interface and the working mode of the air conditioning system is the cooling mode, correct the temperature of the target interface based on the temperature of the target interface, the temperature of the second interface, and the return gas temperature of the compressor of the air conditioning system; if the target interface is the first interface and the working mode of the air conditioning system is the heating mode, correct the temperature of the target interface based on the temperature of the target interface, the temperature of the second interface, and the exhaust gas temperature of the compressor of the air conditioning system; if the target interface is the second interface, correct the temperature of the target interface based on the minimum value of the temperature of the target interface and the temperature of the second interface; if the target interface is the third interface and the working mode of the air conditioning system is the cooling mode, correct the temperature of the target interface based on the temperature of the target interface, the temperature of the fourth interface, and the return gas pressure of the compressor of the air conditioning system; if the target interface is the third interface and the working mode of the air conditioning system is the heating mode, correct the temperature of the target interface based on the temperature of the target interface, the temperature of the fourth interface, and the exhaust gas pressure of the compressor of the air conditioning system; and if the target interface is the fourth interface, correct the temperature of the target interface based on the maximum value of the temperature of the target interface and the temperature of the third interface.

[0181] In some embodiments, the temperature detection device 10 further comprises a control module 15 configured to control the operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface, and the fourth interface.

[0182] In some embodiments, the air conditioning system further comprises a flow control device for controlling the flow of the first pipeline, and a water pump in communication with the second pipeline, and the control module 15 is further configured to control the opening degree of the flow control device, so that the supercooling degree of the heating of the refrigerant flowing out of the first pipeline meets the set supercooling degree requirement, and the superheating degree of the refrigeration meets the set superheating degree requirement; the supercooling degree and the superheating degree of the refrigerant flowing out of the first pipeline are determined based on the temperature of the interface at which the refrigerant flows out of the first interface and the second interface; and the operating power of the water pump is controlled so that the temperature difference between the third interface and the fourth interface is within the set temperature range.

[0183] In some embodiments, the control module 15 is further configured to perform abnormality detection on the temperatures of the first interface, the second interface, the third interface and the fourth interface based on the operating condition of the air conditioning system, to obtain an abnormality detection result, the abnormality detection result including abnormality or normality; and control the operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface and the fourth interface, including: in the case that the abnormality detection result is normality, controlling the operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface and the fourth interface; and in the case that the abnormality detection result is abnormality, controlling the air conditioning system to stop operating.

[0184] In the above, the temperature detection device 10 is described from the perspective of functional modules, which can be implemented in the form of hardware, or in the form of instructions of software, or in the form of a combination of hardware and software modules. Specifically, each step of the method embodiment in the embodiments of the present disclosure can be completed by the integrated logic circuit of hardware in the processor and / or the instruction in the form of software, and the steps of the method disclosed in the embodiments of the present disclosure can be directly embodied as hardware coding processor for execution, or executed by a combination of hardware and software modules in the coding processor. Alternatively, the software module can be located in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps in the above method embodiment.

[0185] Referring to FIG. 14, the air conditioning system 100 of the embodiments of the present disclosure includes a processor 20, a memory 30 and a computer program, wherein the computer program is stored in the memory 30 and executed by the processor 20, and the computer program includes instructions for executing the temperature detection method of any of the above embodiments.

[0186] Alternatively, the air conditioning system can be a multi-connected air conditioner, a whole air conditioner, a heating and ventilation system, a heat pump air conditioner, a central air conditioner, a fresh air conditioner, etc.

[0187] Referring to FIG. 15, the embodiment of the present disclosure further provides a computer readable storage medium 300, which stores a computer program 310. When the computer program 310 is executed by a processor 320, the steps of the temperature detection method according to any one of the above embodiments are implemented. For brevity, details are not described herein.

[0188] In the description of the present specification, the description with reference to the terms "certain embodiments", "in one example", "exemplarily" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present disclosure. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0189] Any process or method descriptions in flow charts or described herein in other ways can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for performing specific logic functions or steps in the process. The flow diagrams and / or methods described herein can also be understood as machines or apparatus for performing the processes described herein, and the preferred embodiments of the present disclosure include additional implementations in which the steps are performed in an order different from the order shown or discussed, including substantially simultaneously or in reverse order, and where the steps are performed by different machines or apparatus, or in different groupings of machines or apparatus, as will be appreciated by persons skilled in the art.

[0190] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and those of ordinary skill in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A temperature detecting method, wherein, The application is applied to an air conditioning system, the air conditioning system comprises a heat exchange assembly, the heat exchange assembly comprises a first pipeline, a second pipeline and a plurality of temperature sensors, the first pipeline comprises a first interface and a second interface, the first pipeline circulates refrigerant, the second pipeline comprises a third interface and a fourth interface, the second pipeline circulates medium which exchanges heat with the refrigerant, the plurality of temperature sensors are arranged at at least three of the first interface, the second interface, the third interface and the fourth interface respectively, and the method comprises the following steps: obtaining temperature information of the plurality of temperature sensors; determining a target interface, the target interface being an interface where a temperature sensor which appears to be faulty is located or an interface where no temperature sensor is arranged among the first interface, the second interface, the third interface and the fourth interface; calculating a temperature of the target interface based on a conservation relationship between a heat exchange amount of the medium and a heat exchange amount of the refrigerant and temperature information of the plurality of temperature sensors of the interfaces other than the target interface.

2. The temperature detecting method according to claim 1, wherein The calculation of the temperature of the target interface based on the conservation relationship between the heat exchange amount of the medium and the heat exchange amount of the refrigerant and the temperature information of the plurality of temperature sensors of the interfaces other than the target interface comprises: in a case where the target interface is the first interface or the second interface, calculating the heat exchange amount of the medium based on temperatures of the temperature sensors of the third interface and the fourth interface, the heat exchange amount of the medium being equal to the heat exchange amount of the refrigerant; calculating the temperature of the target interface based on the heat exchange amount of the refrigerant and temperature information of the temperature sensor of a first reference interface, the first reference interface being an interface other than the target interface among the first interface and the second interface.

3. The temperature detecting method according to claim 2, wherein The calculation of the temperature of the target interface based on the heat exchange amount of the refrigerant and the temperature information of the temperature sensor of the first reference interface comprises: obtaining a flow of the first pipeline and pressures of the first interface and the second interface; calculating an enthalpy difference between the first interface and the second interface based on the heat exchange amount of the refrigerant and the flow; calculating a first enthalpy value corresponding to the pressure of the first reference interface based on a preset mapping relationship, the preset mapping relationship comprising a mapping relationship between pressure and enthalpy value at each temperature, the preset mapping relationship corresponding to the temperature information of the temperature sensor of the first reference interface; calculating a second enthalpy value of the target interface based on the enthalpy difference and the first enthalpy value; determining the temperature of the target interface based on the second enthalpy value and the pressure of the target interface.

4. The temperature detecting method according to claim 1, wherein The calculation of the temperature of the target interface based on the conservation relationship between the heat exchange amount of the medium and the heat exchange amount of the refrigerant and the temperature information of the plurality of temperature sensors of the interfaces other than the target interface comprises: in a case where the target interface is the third interface or the fourth interface, calculating the heat exchange amount of the refrigerant based on temperatures of the temperature sensors of the first interface and the second interface, the heat exchange amount of the refrigerant being equal to the heat exchange amount of the medium; calculating a temperature of the target interface based on the heat exchange amount of the medium and temperature information of the temperature sensor of the second reference interface, the second reference interface being one of the third interface and the fourth interface and the target interface.

5. The temperature detecting method according to claim 4, wherein The air conditioning system further comprises a water pump, the water pump being in communication with the second pipeline, and the calculating the temperature of the target interface based on the heat exchange amount of the medium and temperature information of the temperature sensor of the second reference interface comprises: obtaining a flow rate of the second pipeline, the flow rate of the second pipeline being determined based on an operating power of the water pump; calculating a temperature difference between the third interface and the fourth interface based on the heat exchange amount of the medium and the flow rate of the second pipeline; calculating the temperature of the target interface based on the temperature information of the second reference interface and the temperature difference between the third interface and the fourth interface.

6. The temperature detection method according to any one of claims 2-5, further comprising: if the target interface is the first interface and the operating mode of the air conditioning system is a cooling mode, correcting the temperature of the target interface based on the temperature of the target interface, the temperature of the second interface, and a return gas temperature of a compressor of the air conditioning system; if the target interface is the first interface and the operating mode of the air conditioning system is a heating mode, correcting the temperature of the target interface based on the temperature of the target interface, the temperature of the second interface, and a discharge gas temperature of the compressor of the air conditioning system; if the target interface is the second interface, correcting the temperature of the target interface based on a minimum value of the temperature of the target interface and the temperature of the second interface; if the target interface is the third interface and the operating mode of the air conditioning system is the cooling mode, correcting the temperature of the target interface based on the temperature of the target interface, the temperature of the fourth interface, and a return gas pressure of the compressor of the air conditioning system; if the target interface is the third interface and the operating mode of the air conditioning system is the heating mode, correcting the temperature of the target interface based on the temperature of the target interface, the temperature of the fourth interface, and a discharge gas pressure of the compressor of the air conditioning system; if the target interface is the fourth interface, correcting the temperature of the target interface based on a maximum value of the temperature of the target interface and the temperature of the third interface.

7. The temperature detecting method according to claim 1, wherein Further comprising: controlling an operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface, and the fourth interface.

8. The temperature detecting method according to claim 1, wherein The air conditioning system further comprises a flow control device and a water pump, the flow control device being configured to control a flow rate of the first pipeline, and the water pump being in communication with the second pipeline, and the controlling the operating condition of the air conditioning system based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface, and the fourth interface comprises: controlling the flow rate of the first pipeline based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface, and the fourth interface. control the opening degree of the flow control device, so that the supercooling degree of the heating of the refrigerant flowing out of the first pipeline meets the set supercooling degree requirement, and the superheating degree of the refrigeration meets the set superheating degree requirement; the supercooling degree and the superheating degree of the refrigerant flowing out of the first pipeline are determined based on the temperature of the interface from which the refrigerant flows out of the first interface and the second interface; control the operating power of the water pump, so that the temperature difference between the third interface and the fourth interface is within the set temperature range.

9. The temperature detecting method according to claim 7, wherein Further comprising: based on the operating condition of the air conditioning system, abnormity detection is performed on the temperatures of the first interface, the second interface, the third interface and the fourth interface to obtain an abnormity detection result, the abnormity detection result including abnormity or normality; based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface and the fourth interface, control the operating condition of the air conditioning system, including: in the case that the abnormity detection result is normal, based on the operating condition of the air conditioning system and the temperatures of the first interface, the second interface, the third interface and the fourth interface, control the operating condition of the air conditioning system; in the case that the abnormity detection result is abnormal, control the shutdown of the air conditioning system.

10. A temperature detecting device applied to an air conditioning system, the air conditioning system comprising a heat exchange assembly, the heat exchange assembly comprising a first pipe, a second pipe and a plurality of temperature sensors, the first pipe comprising a first interface and a second interface, the first pipe circulating refrigerant, the second pipe comprising a third interface and a fourth interface, the second pipe circulating medium for heat exchange with the refrigerant, the plurality of temperature sensors being respectively arranged at at least three of the first interface, the second interface, the third interface and the fourth interface. the temperature detection device comprises: an acquisition module, which acquires temperature information of a plurality of temperature sensors; a determination module, which determines a target interface, the target interface being an interface in which a temperature sensor that has failed is located or an interface in which no temperature sensor is arranged among the first interface, the second interface, the third interface and the fourth interface; a calculation module, which calculates the temperature of the target interface based on the conservation relationship between the heat exchange amount of the medium and the heat exchange amount of the refrigerant and the temperature information of a plurality of temperature sensors of interfaces other than the target interface.

11. An air conditioning system wherein, comprise: a processor, a memory; the memory stores a computer program, the computer program is executed by the processor, and the computer program comprises instructions for executing the temperature control method of any one of claims 1 to 9.

12. A non-volatile computer-readable storage medium containing a computer program, which, when executed by a processor, causes the processor to execute the temperature detection method of any one of claims 1 to 9.

Images