Air conditioning system, exhaust temperature detection method and device thereof and storage medium

Abstract

The invention discloses an air conditioning system, an exhaust temperature detection method and device thereof and a storage medium, the exhaust temperature detection method is applied to the air conditioning system, the air conditioning system comprises a compressor and an exhaust temperature sensor installed at the top of the compressor, and the method comprises the steps that the exhaust temperature sensed by the exhaust temperature sensor is obtained; and the exhaust temperature sensed by the exhaust temperature sensor is corrected, and the corrected exhaust temperature is used as a detection result. The exhaust temperature sensor is changed to be mounted at the top of the compressor, and the exhaust temperature acquired by the exhaust temperature sensor is corrected in consideration of possible difference between the coping temperature detected at the top and the actual exhaust temperature, so that the safety risk caused by improper mounting position of the exhaust temperature sensor is avoided, and the safety of the compressor is improved. And the exhaust temperature can be accurately detected.

Description

Technical Field

[0001] This article relates to air conditioning system control technology, and more particularly to an air conditioning system and its exhaust temperature detection method, device and storage medium. Background Technology

[0002] Because the compressor exhaust pipe is located inside the air conditioner, the limited space makes it difficult to install the exhaust temperature sensor. Furthermore, since the protective sleeve (which can be called a sleeve, usually made of metal) for installing the exhaust temperature sensor is directly welded to the compressor exhaust pipe, the vibration caused by the compressor running causes the sleeve to rub against the exhaust pipe continuously. Over a long period of operation, fatigue cracks are likely to develop at the friction points, which may eventually lead to exhaust pipe breakage, posing a significant risk of mechanical failure and safety hazards. Summary of the Invention

[0003] This disclosure provides an air conditioning system and its exhaust temperature detection method, device, and storage medium that, while avoiding safety risks caused by improper installation of the exhaust temperature sensor, can also achieve accurate detection of exhaust temperature.

[0004] The exhaust temperature detection method provided in this disclosure is applied to an air conditioning system, which includes a compressor and an exhaust temperature sensor installed on top of the compressor. The method includes: Obtain the exhaust temperature sensed by the exhaust temperature sensor; The exhaust temperature sensed by the exhaust temperature sensor is corrected, and the corrected exhaust temperature is used as the detection result.

[0005] In some exemplary embodiments, the air conditioning system further includes an ambient temperature sensor disposed on the air inlet side of the outdoor heat exchanger; Correcting the exhaust temperature sensed by the exhaust temperature sensor includes: The ambient temperature sensed by the ambient temperature sensor is obtained; The exhaust temperature sensed by the exhaust temperature sensor is corrected based on the ambient temperature sensed by the ambient temperature sensor.

[0006] In some exemplary embodiments, correcting the exhaust temperature sensed by the exhaust temperature sensor based on the ambient temperature sensed by the ambient temperature sensor includes: The initial compensation temperature is calculated based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, and the preset compensation slope and compensation deviation. The calculated initial compensation temperature is compared with the preset minimum compensation temperature and full compensation temperature, and the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the first comparison result; wherein the minimum compensation temperature is less than the full compensation temperature. The corrected exhaust temperature is calculated based on the exhaust temperature sensed by the exhaust temperature sensor and the obtained adjustment compensation temperature.

[0007] In some exemplary embodiments, before calculating the initial compensation temperature based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, and a preset compensation slope and compensation deviation, the method further includes: Determine whether the exhaust temperature sensed by the exhaust temperature sensor is greater than the preset critical compensation temperature; When the exhaust temperature sensed by the exhaust temperature sensor is greater than the critical compensation temperature, the initial compensation temperature is calculated based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, and the preset compensation slope and compensation deviation.

[0008] In some exemplary embodiments, calculating the initial compensation temperature based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, a preset compensation slope, and a compensation deviation includes: Calculate the temperature difference between the ambient temperature sensed by the ambient temperature sensor and the exhaust temperature sensed by the exhaust temperature sensor; Based on the obtained temperature difference, and using a pre-set compensation slope and compensation deviation as the slope and offset respectively, the initial compensation temperature is calculated from the ambient temperature sensed by the ambient temperature sensor through a linear mapping method.

[0009] In some exemplary embodiments, calculating the adjustment compensation temperature corresponding to the initial compensation temperature based on the first comparison result obtained from the comparison includes: If the first comparison result shows that the initial compensation temperature is greater than the minimum compensation temperature but not greater than the full compensation temperature, the exhaust temperature compensation base temperature is calculated based on the initial compensation temperature and using a smoothing coefficient. The smoothing coefficient varies with the relationship between the exhaust temperature sensed by the exhaust temperature sensor, the critical compensation temperature, and the full compensation temperature, being greater than 0 and less than 1. The smoothing coefficient tends to be 0 as the exhaust temperature sensed by the exhaust temperature sensor approaches the critical compensation temperature, and tends to be 1 as the exhaust temperature sensed by the exhaust temperature sensor approaches the full compensation temperature. The obtained base compensation temperature is compared with the preset maximum compensation temperature, and the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the second comparison result.

[0010] In some exemplary embodiments, calculating the adjustment compensation temperature corresponding to the initial compensation temperature based on the first comparison result obtained from the comparison includes: If the first comparison result shows that the initial compensation temperature is greater than the full compensation temperature, the initial compensation temperature is taken as the base compensation temperature. The obtained base compensation temperature and the preset maximum compensation temperature are compared, and the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the second comparison result.

[0011] In some exemplary embodiments, calculating the adjustment compensation temperature corresponding to the initial compensation temperature based on the second comparison result obtained from the comparison includes: Obtain the configuration information of the air conditioning system, and obtain the correction coefficient corresponding to the obtained configuration information according to the correspondence between the configuration information and the correction coefficient; If the obtained basic compensation temperature is not greater than the maximum compensation temperature, the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the obtained correction coefficient and the calculated basic compensation temperature. If the obtained base compensation temperature is greater than the maximum compensation temperature, the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the obtained correction coefficient and the maximum compensation temperature.

[0012] The exhaust temperature detection device provided in this embodiment includes: a memory and a processor, wherein the memory is configured to store an executable program; The processor is configured to read and execute the executable program to perform the exhaust temperature detection method as described above.

[0013] The air conditioning system provided in this disclosure includes: a compressor, an exhaust temperature sensor installed on the top of the compressor, and an exhaust temperature detection device as described above.

[0014] The computer-readable storage medium provided in this embodiment stores a computer program, wherein when the computer program is executed by a processor, it can implement the exhaust temperature detection method as described above.

[0015] Compared with related technologies, the air conditioning system and its exhaust temperature detection method, device and storage medium provided in this application embodiment, in order to avoid the safety hazards caused by the protective sleeve welded to the exhaust pipe constantly rubbing against the exhaust pipe during compressor operation, the exhaust temperature sensor is installed on the top of the compressor. Considering that the pressure top temperature detected at the top may differ from the actual exhaust temperature, the exhaust temperature obtained by the exhaust temperature sensor is corrected. Therefore, while avoiding the safety risks caused by improper installation position of the exhaust temperature sensor, accurate detection of exhaust temperature can also be achieved.

[0016] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application can be realized and obtained by means of the solutions described in the description and the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings are used to provide an understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0018] Figure 1 This is a schematic diagram showing the installation location of the exhaust temperature sensor in related technologies; Figure 2 This is a schematic flowchart of an exhaust temperature detection method according to an embodiment of this application; Figure 3 This is a schematic diagram illustrating a process for correcting the exhaust temperature sensed by an exhaust temperature sensor according to an embodiment of this application. Figure 4 This is a schematic flowchart of another exhaust temperature detection method according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of an exhaust temperature detection device according to an embodiment of this application; Figure 6 This is a schematic diagram of another exhaust temperature detection device according to an embodiment of this application; Figure 7 This is a schematic diagram of an air conditioning system according to an embodiment of this application. Detailed Implementation

[0019] This application describes several embodiments, but these descriptions are exemplary and not restrictive, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with, or may replace, any feature or element of any other embodiment.

[0020] This application includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this application can also be combined with any conventional features or elements to form unique inventive solutions. Any feature or element of any embodiment can also be combined with features or elements from other inventive solutions to form another unique inventive solution. Therefore, it should be understood that any feature shown and / or discussed in this application can be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes can be made within the scope of the appended claims.

[0021] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims concerning the method and / or process should not be limited to the steps performed in the written order, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0022] In related technologies, a schematic diagram of the exhaust temperature sensor mounting structure can be shown as follows: Figure 1 As shown, the exhaust temperature sensor 10 and the sleeve 11 of the exhaust temperature sensor are directly welded to the exhaust pipe 12 of the compressor. Therefore, the vibration caused by the compressor during operation causes the sleeve 11 to continuously rub against the exhaust pipe 12. Under long-term operation, fatigue cracks are easily generated at the friction part, which may eventually lead to the exhaust pipe 12 breaking, posing a significant risk of mechanical failure and safety hazards.

[0023] Therefore, this disclosure provides an exhaust temperature detection method applied to an air conditioning system, characterized in that the air conditioning system includes: a compressor and an exhaust temperature sensor installed on the top of the compressor, such as... Figure 2 As shown, the method includes: Step 200: Obtain the exhaust temperature sensed by the exhaust temperature sensor; Step 201: Correct the exhaust temperature sensed by the exhaust temperature sensor and use the corrected exhaust temperature as the detection result.

[0024] For example, to avoid the safety hazard caused by the protective sleeve welded to the exhaust pipe constantly rubbing against the exhaust pipe during compressor operation, the air conditioner exhaust temperature sensor is changed to be placed on top of the compressor. Due to the specific structure of the compressor (such as exhaust flow path, local heat conduction differences, etc.), the pressure top temperature detected at the top is significantly different from the actual exhaust temperature. If the pressure top temperature is directly used as the exhaust temperature for logic calculation, it is easy to cause deviations in the calculated value of the control logic, resulting in abnormal regulation of compressor frequency, main valve opening and fan speed, and the machine operating state exceeding the normal operating range, which in turn leads to exhaust overheating. Therefore, it is necessary to correct the exhaust temperature sensed by the exhaust temperature sensor.

[0025] The exhaust temperature detection method provided in this embodiment installs the exhaust temperature sensor on the top of the compressor and corrects the difference when a difference is found between the detected top temperature and the actual exhaust temperature. Therefore, it achieves accurate detection of exhaust temperature while avoiding the safety risks caused by improper installation of the exhaust temperature sensor.

[0026] In some exemplary embodiments, the air conditioning system further includes an ambient temperature sensor, which is disposed on the air inlet side of the outdoor heat exchanger; Correcting the exhaust temperature sensed by the exhaust temperature sensor includes: The ambient temperature sensed by the ambient temperature sensor is obtained; The exhaust temperature sensed by the exhaust temperature sensor is corrected based on the ambient temperature sensed by the ambient temperature sensor.

[0027] In other embodiments, the sensed exhaust temperature may be corrected based on the temperature collected by one or more other sensors.

[0028] In some exemplary embodiments, such as Figure 3 As shown, the correction of the exhaust temperature sensed by the exhaust temperature sensor based on the ambient temperature sensed by the ambient temperature sensor includes: Step 300: Calculate the initial compensation temperature based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, and the preset compensation slope and compensation deviation. Step 301: Compare the calculated initial compensation temperature with the preset minimum compensation temperature and full compensation temperature, and calculate the adjustment compensation temperature corresponding to the initial compensation temperature based on the first comparison result; wherein the minimum compensation temperature is less than the full compensation temperature. Step 302: Calculate the corrected exhaust temperature based on the exhaust temperature sensed by the exhaust temperature sensor and the obtained adjustment compensation temperature.

[0029] For example, the compensation slope and deviation are parameters calibrated based on the compressor's structural characteristics, differences in sensor installation locations, and historical operating data, used to quantify the degree of influence of ambient temperature on exhaust temperature measurement.

[0030] To avoid over- or under-correction of the initial compensation temperature due to extreme operating conditions (such as abnormally high or low temperatures), two preset thresholds are introduced: a minimum compensation temperature reflecting the minimum acceptable correction range, and a full compensation temperature reflecting the maximum correction requirement. The adjusted compensation temperature is calculated by comparing the initial compensation temperature with these two thresholds. This prevents both under-correction leading to control logic misjudgments and over-correction causing system parameters to deviate from the normal range, ensuring that the adjusted compensation temperature remains within a reasonable range and balancing correction accuracy and stability.

[0031] The corrected exhaust temperature can be directly used as an input parameter for the control logic to dynamically adjust the compressor frequency, main valve opening, and fan speed, ensuring that the system operates within its design conditions. For example, when the corrected exhaust temperature approaches a safe threshold, the compressor speed can be reduced or the fan airflow increased in a timely manner to avoid the risk of overheating and shutdown.

[0032] In other embodiments, the initial compensation temperature can be calculated based on the ambient temperature and other predetermined coefficients; or, the corrected exhaust temperature can be calculated directly based on the initial compensation temperature and the sensed exhaust temperature, and then it can be determined whether the difference between the corrected exhaust temperature and the sensed exhaust temperature is too large, and then further adjustments can be considered.

[0033] In some exemplary embodiments, before calculating the initial compensation temperature based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, and a preset compensation slope and compensation deviation, the method further includes: Determine whether the exhaust temperature sensed by the exhaust temperature sensor is greater than the preset critical compensation temperature; If the exhaust temperature sensed by the exhaust temperature sensor is greater than the critical compensation temperature, the step of calculating the initial compensation temperature is performed based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, and the preset compensation slope and compensation deviation.

[0034] For example, the critical compensation temperature can be a threshold determined based on the compressor's thermodynamic characteristics, differences in sensor installation locations, and historical operating data. It can be set as the critical point where the exhaust temperature error begins to significantly affect control accuracy. For instance, when the exhaust temperature exceeds a certain specific temperature, the deviation between the temperature measuring point at the top of the compressor and the actual exhaust temperature may increase sharply due to the local heat accumulation effect. At this point, a compensation mechanism is triggered to avoid misjudgment by the control logic.

[0035] In some exemplary embodiments, calculating the initial compensation temperature based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, a preset compensation slope, and a compensation deviation includes: Calculate the temperature difference between the ambient temperature sensed by the ambient temperature sensor and the exhaust temperature sensed by the exhaust temperature sensor; Based on the obtained temperature difference, and using a pre-set compensation slope and compensation deviation as the slope and offset respectively, the initial compensation temperature is calculated through a linear mapping method.

[0036] For example, the compensation slope is used to quantify the proportion of the influence of exhaust temperature on the compensation temperature, while the compensation deviation reflects the system's fixed correction requirements under baseline operating conditions. The initial compensation temperature can be calculated using a linear or nonlinear function. If calculated using a linear function, its expression can be as follows:

[0037] in, Indicates the initial compensation temperature. This indicates the exhaust temperature sensed by the exhaust temperature sensor. This indicates the ambient temperature sensed by the ambient temperature sensor. This indicates the compensation slope. This indicates the compensation deviation.

[0038] In some exemplary embodiments, calculating the adjustment compensation temperature corresponding to the initial compensation temperature based on the first comparison result obtained from the comparison includes: If the first comparison result shows that the initial compensation temperature is greater than the minimum compensation temperature but not greater than the full compensation temperature, the base compensation temperature is calculated based on the initial compensation temperature and using a smoothing coefficient. The smoothing coefficient varies with the relationship between the exhaust temperature sensed by the exhaust temperature sensor, the critical compensation temperature, and the full compensation temperature; it is greater than 0 and less than 1. The smoothing coefficient tends towards 0 as the exhaust temperature sensed by the exhaust temperature sensor approaches the critical compensation temperature, and tends towards 1 as the exhaust temperature sensed by the exhaust temperature sensor approaches the full compensation temperature. The obtained base compensation temperature is compared with the preset maximum compensation temperature, and the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the second comparison result.

[0039] For example, when the smoothing coefficient is 0, the compensation base temperature is directly taken as the lowest compensation temperature (i.e., only the minimum correction range is retained, and the correction strategy is completely conservative); when the smoothing coefficient is 1, the compensation base temperature is equal to the initial compensation temperature (i.e., the original correction logic is used completely). The core objective of this process is to eliminate abrupt changes in the compensation temperature near the critical temperature, ensuring that the correction range gradually increases when entering the compensation range, avoiding drastic adjustments in the opening of the electronic expansion valve or frequent fluctuations in the compressor frequency due to step changes.

[0040] In the absence of a smooth transition mechanism, the corrected exhaust temperature may exhibit abrupt fluctuations between the corrected and uncorrected states. For example, when the air conditioning system is in transitional operation, the corrected exhaust temperature may repeatedly jump between 60.1℃ and 62.9℃, with a fluctuation range of up to 2.8℃. Such fluctuations can significantly impact the stability of the air conditioning system's control logic. For instance, electronic expansion valve regulation may fail: the superheat adjustment range of the electronic expansion valve is typically designed to be ±1℃ (i.e., allowing dynamic adjustment of superheat within the range of -1℃ to +1℃). However, the current temperature fluctuation range (2.8℃) far exceeds this range, causing the expansion valve to be unable to maintain a stable refrigerant flow through fine-tuning. For example, when the temperature suddenly increases from 60.1℃ to 62.9℃, the air conditioning system may misinterpret this as an abnormal increase in superheat, triggering an unnecessary increase in opening, which in turn exacerbates the refrigerant flow imbalance. Another example is the compressor frequency limiting logic mistriggered: the compressor's frequency regulation logic is typically based on a comparison between the exhaust temperature and a safety threshold. If the corrected exhaust temperature fluctuates frequently and approaches or exceeds the frequency limiting threshold (e.g., set at 65°C), the system may incorrectly determine that the compressor has entered the high-temperature danger zone and prematurely trigger the frequency limiting protection. For example, during the process of the temperature rising from 60.1°C to 62.9°C, the air conditioning system may be forced to stop the compressor due to a brief high-temperature signal, leading to a decrease in operating efficiency or even the risk of shutdown.

[0041] For example, the smoothing coefficient can be expressed as ,in, Indicates exhaust temperature. Indicates the critical compensation temperature. This indicates that the temperature is fully compensated.

[0042] In some exemplary embodiments, calculating the adjustment compensation temperature corresponding to the initial compensation temperature based on the first comparison result obtained from the comparison includes: If the first comparison result shows that the initial compensation temperature is greater than the full compensation temperature, the initial compensation temperature is taken as the base compensation temperature. The obtained base compensation temperature and the preset maximum compensation temperature are compared, and the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the second comparison result.

[0043] For example, the fully compensated temperature represents the maximum allowable correction under extreme operating conditions (e.g., the maximum thermal deviation in high-temperature environments). When the initial compensated temperature exceeds this threshold, it indicates that the current exhaust temperature measurement error has significantly deviated from the design expectation. In this case, the initial compensated temperature will be directly used as the base compensated temperature to quickly respond to potential risks (e.g., compressor overheating). This design ensures that the air conditioning system can quickly adjust the control logic through direct correction under high-risk operating conditions (e.g., sudden rise in ambient temperature or sensor malfunction), avoiding equipment damage due to excessive conservatism.

[0044] To prevent the corrected temperature from being abnormally amplified due to calculation errors or extreme operating conditions (such as sensor drift), a boundary constraint is applied using the maximum compensation temperature. For example, if the initial compensation temperature reaches 8°C due to a mismeasurement of the ambient temperature, while the maximum compensation temperature is preset to 6°C, the forced correction temperature will be limited to 6°C, thus preventing the compressor from prematurely shutting down due to misjudging high temperatures. This mechanism balances correction accuracy and control logic stability while ensuring the safety of the air conditioning system, ensuring reliable operation of the air conditioning system under complex conditions.

[0045] In one exemplary instance, calculating the adjustment compensation temperature corresponding to the initial compensation temperature based on the second comparison result obtained from the comparison includes: Obtain the configuration information of the air conditioning system, and obtain the correction coefficient corresponding to the obtained configuration information according to the correspondence between the configuration information and the correction coefficient; If the obtained basic compensation temperature is not greater than the maximum compensation temperature, the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the obtained correction coefficient and the calculated basic compensation temperature. If the obtained base compensation temperature is greater than the maximum compensation temperature, the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the obtained correction coefficient and the maximum compensation temperature.

[0046] For example, the configuration information of an air conditioning system may include the configuration information of the compressor, outdoor heat exchanger, and exhaust pipe. The compressor configuration information may include the model, power, installation location, and thermal conductivity characteristics. The outdoor heat exchanger configuration information may include the fin density, material, and airflow distribution characteristics. The exhaust pipe configuration information may include the pipe diameter, length, insulation layer thickness, and material thermal conductivity. This configuration information directly affects the thermodynamic behavior of the system (e.g., refrigerant flow resistance, heat exchange efficiency, and temperature gradient distribution), thereby determining the measurement error mode of the exhaust temperature sensor.

[0047] This disclosure also provides an exhaust temperature detection method, such as... Figure 4 As shown, it includes: Step 400: Obtain the exhaust temperature detected by the exhaust temperature sensor. .

[0048] Step 401: Determine the exhaust temperature Is it greater than the critical compensation temperature? If the exhaust temperature greater than the critical compensation temperature Then proceed to step 402, if the exhaust temperature Not greater than the critical compensation temperature Then proceed to step 404.

[0049] Step 402, based on exhaust temperature Ambient temperature and compensation coefficient , Calculate the initial compensation temperature .

[0050] Among them, ambient temperature The coefficient was obtained from the ambient temperature sensor. , These correspond to the compensation slope and compensation deviation in the above embodiments, respectively.

[0051] Step 403: Determine the initial compensation temperature Is it greater than the minimum compensation temperature? If the initial compensation temperature greater than the minimum compensation temperature Then proceed to step 405, if the initial compensation temperature No greater than the minimum compensation temperature Then proceed to step 404. Step 404: No corrections are made, i.e., let , This indicates the corrected exhaust temperature.

[0052] Step 405: Determine the exhaust temperature Is it greater than the fully compensated temperature? If the exhaust temperature greater than the fully compensated temperature Execute step 406, if the exhaust temperature No greater than the fully compensated temperature Proceed to step 410. Step 406: Calculate the base compensation temperature based on the initial compensation temperature and using the smoothing coefficient. .

[0053] Right now ,in, Initial compensation temperature .

[0054] Step 407: Determine the basic compensation temperature Is it greater than the maximum compensation temperature? If the basic compensation temperature greater than the maximum compensation temperature Then proceed to step 408, if the basic compensation temperature No greater than the maximum compensation temperature Then proceed to step 409.

[0055] Step 408: Obtain the correction coefficient And combined with the maximum compensation temperature Calculate the adjusted compensation temperature, and then calculate the corrected exhaust temperature based on the exhaust temperature and the adjusted compensation temperature. .

[0056] In this step, the corrected exhaust temperature ,in, It involves adjusting the compensation temperature.

[0057] Step 409: Obtain the correction coefficient , initial compensation temperature As the basic compensation temperature and combined with basic compensation temperature Calculate the adjusted compensation temperature, and then calculate the corrected exhaust temperature based on the exhaust temperature and the adjusted compensation temperature. .

[0058] In this step, the corrected exhaust temperature ,in, It involves adjusting the compensation temperature. = .

[0059] Step 410: Calculate the base compensation temperature based on the initial compensation temperature and using the smoothing coefficient. .

[0060] Basic compensation temperature Among them, the initial compensation temperature .

[0061] Step 411: Determine the basic compensation temperature Is it greater than the maximum compensation temperature? If the basic compensation temperature greater than the maximum compensation temperature Then proceed to step 408, if the basic compensation temperature No greater than the maximum compensation temperature Then proceed to step 412. Step 412: Obtain the correction coefficient and combined with basic compensation temperature Calculate the adjusted compensation temperature, and then calculate the corrected exhaust temperature based on the exhaust temperature and the adjusted compensation temperature. .

[0062] In this step, ,in, To adjust the compensation temperature, Basic compensation temperature .

[0063] The following is a specific example to illustrate the exhaust temperature detection method provided in this application. Assume... =60℃, =1℃, =0.07, =1.5℃, =75℃, =12℃, correction factor =0.8, directly detected It is 67℃. The exhaust temperature is 41℃. The exhaust temperature detection method provided in this application includes: Step 1: Detect the current exhaust temperature It is 67℃; Step 2 Is it greater than the critical compensation temperature? If the temperature is 67℃, which is higher than 60℃, proceed to step 3. Step 3 Calculate the initial compensation temperature .

[0064] Step 4, Judgment Is it greater than the minimum compensation temperature? , Since the temperature is greater than 1°C, proceed to step 5. Step 5, Judgment Is it greater than the fully compensated temperature? Since the temperature is not greater than 75℃, proceed to step 7. Step 6: Calculate the basic compensation temperature ℃; Step 7, Judgment Is it greater than the maximum compensation temperature? Since 1.6℃ is not greater than 12℃, proceed to step 8. Step 8: Calculate the adjusted compensation temperature corresponding to the initial compensation temperature based on the obtained correction coefficient and the calculated basic compensation temperature, and add it to the directly detected exhaust temperature to obtain the final exhaust temperature (i.e., the corrected exhaust temperature). .

[0065] The calculated exhaust temperature will be used to control various components of the system, such as the electronic expansion valve. When the calculated exhaust temperature is 68.2℃, tc=59℃, and DSH=9℃, if the system DSHS=20℃, the expansion valve will close to achieve a higher exhaust superheat. Another example is compressor regulation. When the calculated exhaust temperature is 95℃, the system will be in a state where the exhaust temperature limits frequency increase, preventing the compressor from increasing its frequency.

[0066] The necessity of the "smooth transition mechanism" used in the exhaust temperature detection method provided in this application embodiment is explained as follows: when =60.1℃, ℃, ℃, final exhaust temperature ℃. If there is no transition zone correction, then ℃, because the temperature sensor's detection is easily fluctuated by environmental factors, therefore If the temperature fluctuates to 59.1℃, the exhaust temperature will jump between corrected and uncorrected states, sometimes... ℃, sometimes Temperature fluctuations can cause fluctuations in the control of the air conditioning system. For example, the range where the electronic expansion valve is not adjusted is usually ±1℃ for superheat. At this time, the fluctuation range reaches 2.8℃, which exceeds the range. At the same time, the compressor frequency limiting logic will also be affected, and it is easy to enter the frequency limiting range prematurely due to fluctuations, causing the compressor to stop increasing the frequency. Therefore, the transition zone correction is very necessary.

[0067] This disclosure also provides an exhaust temperature detection device, such as... Figure 5 As shown, it includes an acquisition module 51 and a processing module 52; The acquisition module 51 is used to acquire the exhaust temperature sensed by the exhaust temperature sensor; The processing module 52 is used to correct the exhaust temperature sensed by the exhaust temperature sensor and use the corrected exhaust temperature as the detection result.

[0068] In one exemplary embodiment, the air conditioning system further includes: an ambient temperature sensor disposed on the air inlet side of the outdoor heat exchanger, and the processing module 52 is used for: The ambient temperature sensed by the ambient temperature sensor is obtained; The exhaust temperature sensed by the exhaust temperature sensor is corrected based on the ambient temperature sensed by the ambient temperature sensor.

[0069] In one exemplary instance, processing module 52 is used to: The initial compensation temperature is calculated based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, and the preset compensation slope and compensation deviation. The calculated initial compensation temperature is compared with the preset minimum compensation temperature and full compensation temperature, and the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the first comparison result; wherein the minimum compensation temperature is less than the full compensation temperature. The corrected exhaust temperature is calculated based on the exhaust temperature sensed by the exhaust temperature sensor and the obtained adjustment compensation temperature.

[0070] In one exemplary instance, the processing module 52 is further configured to: Determine whether the exhaust temperature sensed by the exhaust temperature sensor is greater than the preset critical compensation temperature; When the exhaust temperature sensed by the exhaust temperature sensor is greater than the critical compensation temperature, the initial compensation temperature is calculated based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, and the preset compensation slope and compensation deviation.

[0071] In one exemplary instance, processing module 52 is used to: Calculate the temperature difference between the ambient temperature sensed by the ambient temperature sensor and the exhaust temperature sensed by the exhaust temperature sensor; Based on the obtained temperature difference, and using a pre-set compensation slope and compensation deviation as the slope and offset respectively, the initial compensation temperature is calculated through a linear mapping method.

[0072] In one exemplary instance, processing module 52 is used to: If the first comparison result shows that the initial compensation temperature is greater than the minimum compensation temperature but not greater than the full compensation temperature, the exhaust temperature compensation base temperature is calculated based on the initial compensation temperature and using a smoothing coefficient. The smoothing coefficient varies with the relationship between the exhaust temperature sensed by the exhaust temperature sensor, the critical compensation temperature, and the full compensation temperature, being greater than 0 and less than 1. The smoothing coefficient tends to be 0 as the exhaust temperature sensed by the exhaust temperature sensor approaches the critical compensation temperature, and tends to be 1 as the exhaust temperature sensed by the exhaust temperature sensor approaches the full compensation temperature. The obtained base compensation temperature is compared with the preset maximum compensation temperature, and the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the second comparison result.

[0073] In one exemplary instance, processing module 52 is used to: If the first comparison result shows that the initial compensation temperature is greater than the full compensation temperature, the initial compensation temperature is taken as the base compensation temperature. The obtained base compensation temperature and the preset maximum compensation temperature are compared, and the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the second comparison result.

[0074] In one exemplary instance, processing module 52 is used to: Obtain the configuration information of the air conditioning system, and obtain the correction coefficient corresponding to the obtained configuration information according to the correspondence between the configuration information and the correction coefficient; If the obtained basic compensation temperature is not greater than the maximum compensation temperature, the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the obtained correction coefficient and the calculated basic compensation temperature. If the obtained base compensation temperature is greater than the maximum compensation temperature, the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the obtained correction coefficient and the maximum compensation temperature.

[0075] The exhaust temperature detection device provided in this embodiment avoids the safety hazard caused by the protective sleeve welded to the exhaust pipe constantly rubbing against the exhaust pipe during compressor operation. Instead, the exhaust temperature sensor is installed on the top of the compressor. Considering that the pressure top temperature detected at the top may differ from the actual exhaust temperature, the exhaust temperature obtained by the exhaust temperature sensor is corrected. Therefore, while avoiding the safety risks caused by improper installation of the exhaust temperature sensor, accurate detection of the exhaust temperature can also be achieved.

[0076] This disclosure also provides an exhaust temperature detection device, which includes a memory and a processor, wherein the memory is configured to store an executable program. The processor is configured to read and execute the executable program to implement the exhaust temperature detection method as described in any embodiment of this disclosure.

[0077] This disclosure also provides an air conditioning system, such as... Figure 6 As shown, it includes: a compressor 61, an exhaust temperature sensor 62 mounted on the top of the compressor, and an exhaust temperature detection device 63 as described in the above embodiment.

[0078] This disclosure also provides an air conditioning system, such as... Figure 7 As shown, the air conditioning system includes an indoor unit and an outdoor unit (two main parts, which are connected by liquid pipes and gas pipes to form a closed refrigerant circulation loop).

[0079] The refrigeration cycle begins with the compressor, located at the bottom of the outdoor unit, which serves as the power source for the entire system. The compressor draws in low-temperature, low-pressure gaseous refrigerant from the gas-liquid separator and compresses it into high-temperature, high-pressure superheated gas. This gas is then sent through the exhaust pipe to the first port of the four-way valve (usually marked "D" port).

[0080] The four-way valve is the core component for switching between cooling and heating modes. In cooling mode, the valve core inside the four-way valve is in a specific position, allowing high-temperature, high-pressure gas to flow from the first port (D) to the second port (usually marked "C"), and then into the heat exchanger on the heat source side (i.e., the condenser). In the same state, the third port (S) and the fourth port (E) of the four-way valve also remain connected, ensuring that the refrigerant gas returning from the indoor unit can smoothly return to the compressor suction port. Specifically, the first port (D) connects to the compressor discharge port; the second port (C) connects to the heat exchanger (condenser) on the heat source side; the third port (S) connects to the gas-liquid separator (i.e., the compressor suction side); and the fourth port (E) connects to the gas pipe of the indoor unit (evaporator outlet).

[0081] The heat exchanger on the heat source side is located at the top of the outdoor unit. It is cooled by forced convection by a fan, which allows the high-temperature, high-pressure gaseous refrigerant to release heat to the ambient air and gradually condense into a high-temperature, high-pressure saturated liquid or subcooled liquid.

[0082] The condensed liquid refrigerant flows out from the liquid-side outlet pipe of the heat exchanger on the heat source side. It first passes through a filter to remove moisture, impurities, and welding slag from the system, protecting subsequent precision components. Next, the refrigerant flows through the expansion valve, a throttling device. During this process, the pressure drops sharply, and some of the liquid evaporates into gas, forming a low-temperature, low-pressure gas-liquid two-phase mixture. To ensure stable throttling effect, a filter is installed before and after the expansion valve. The throttled refrigerant then passes through a second filter for further purification before being delivered to the indoor unit through the liquid pipe.

[0083] A liquid-side shut-off valve is installed on the liquid line to cut off the liquid circuit during installation, maintenance, or vacuuming, facilitating system operation. After entering the indoor unit, the low-temperature, low-pressure refrigerant flows into the indoor heat exchanger (labeled "outdoor heat exchanger" in the diagram, but actually used as an evaporator in cooling mode). Here, the refrigerant absorbs heat from the indoor air and completely evaporates into a low-temperature, low-pressure superheated gas. The indoor fan forces air to flow through the heat exchanger fins, cooling the room. The evaporated gaseous refrigerant returns to the outdoor unit through a gas pipe.

[0084] A gas-side shut-off valve is installed on the gas pipe, also used to isolate the gas path during system maintenance. The low-temperature, low-pressure gaseous refrigerant returning to the outdoor unit first enters the gas-liquid separator, located before the compressor suction port. This device captures any liquid droplets that may be trapped due to incomplete evaporation, preventing liquid refrigerant from entering the compressor and causing "liquid slugging" damage. The pure gaseous refrigerant after gas-liquid separation is then re-drawn into the compressor through the return gas pipe, completing the entire refrigeration cycle.

[0085] In addition, three temperature sensors are installed around or on the heat exchanger on the heat source side. Among them, T4 is the ambient temperature sensor, which is set in a preset area around the heat exchanger on the heat source side to detect the outdoor ambient air temperature in real time and provide environmental condition reference for the system; T3B is the temperature sensor in the middle of the heat exchanger, which is installed in the central section of the main pipe channel to monitor the temperature distribution in the middle area of ​​the condenser and help to judge the heat exchange efficiency or the frosting / ash accumulation status; T3 is the heat exchanger outlet temperature sensor, which is usually arranged near the outlet of the condenser coil to reflect the actual condensation temperature or subcooling of the refrigerant. It is an important feedback signal for controlling the opening of the electronic expansion valve and optimizing energy efficiency.

[0086] In addition, an exhaust temperature sensor Tpold is installed on the top of the compressor. The exhaust temperature detected by the exhaust temperature sensor Tpold can realize the exhaust temperature detection method described in any of the above embodiments.

[0087] This disclosure also provides a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, it can implement the exhaust temperature detection method as described in any of the above embodiments.

[0088] It will be understood by those skilled in the art that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term "computer storage medium" includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

Claims

1. An exhaust temperature detection method, applied to an air conditioning system, characterized in that, The air conditioning system includes a compressor and an exhaust temperature sensor mounted on top of the compressor; the method includes: Obtain the exhaust temperature sensed by the exhaust temperature sensor; The exhaust temperature sensed by the exhaust temperature sensor is corrected, and the corrected exhaust temperature is used as the detection result.

2. The exhaust temperature detection method according to claim 1, characterized in that, The air conditioning system also includes: an ambient temperature sensor, which is located on the air inlet side of the outdoor heat exchanger; Correcting the exhaust temperature sensed by the exhaust temperature sensor includes: The ambient temperature sensed by the ambient temperature sensor is obtained; The exhaust temperature sensed by the exhaust temperature sensor is corrected based on the ambient temperature sensed by the ambient temperature sensor.

3. The method according to claim 2, characterized in that, Correcting the exhaust temperature sensed by the exhaust temperature sensor based on the ambient temperature sensed by the ambient temperature sensor includes: The initial compensation temperature is calculated based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, and the preset compensation slope and compensation deviation. The calculated initial compensation temperature is compared with the preset minimum compensation temperature and full compensation temperature, and the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the first comparison result; wherein the minimum compensation temperature is less than the full compensation temperature. The corrected exhaust temperature is calculated based on the exhaust temperature sensed by the exhaust temperature sensor and the obtained adjustment compensation temperature.

4. The method according to claim 3, characterized in that, Before calculating the initial compensation temperature based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, and the preset compensation slope and compensation deviation, the following steps are also included: Determine whether the exhaust temperature sensed by the exhaust temperature sensor is greater than the preset critical compensation temperature; If the exhaust temperature sensed by the exhaust temperature sensor is greater than the critical compensation temperature, the step of calculating the initial compensation temperature based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, and the preset compensation slope and compensation deviation is performed.

5. The method according to claim 3 or 4, characterized in that, The initial compensation temperature is calculated based on the ambient temperature sensed by the ambient temperature sensor, the exhaust temperature sensed by the exhaust temperature sensor, a preset compensation slope, and a compensation deviation, including: Calculate the temperature difference between the ambient temperature sensed by the ambient temperature sensor and the exhaust temperature sensed by the exhaust temperature sensor; Based on the obtained temperature difference, and using a pre-set compensation slope and compensation deviation as the slope and offset respectively, the initial compensation temperature is calculated through a linear mapping method.

6. The method according to claim 3, characterized in that, Calculate the adjustment compensation temperature corresponding to the initial compensation temperature based on the first comparison result obtained from the comparison, including: If the first comparison result shows that the initial compensation temperature is greater than the minimum compensation temperature but not greater than the full compensation temperature, the exhaust temperature compensation base temperature is calculated based on the initial compensation temperature and using a smoothing coefficient. The smoothing coefficient varies with the relationship between the exhaust temperature sensed by the exhaust temperature sensor, the critical compensation temperature, and the full compensation temperature, being greater than 0 and less than 1. The smoothing coefficient tends to be 0 as the exhaust temperature sensed by the exhaust temperature sensor approaches the critical compensation temperature, and tends to be 1 as the exhaust temperature sensed by the exhaust temperature sensor approaches the full compensation temperature. The obtained base compensation temperature is compared with the preset maximum compensation temperature, and the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the second comparison result.

7. The method according to claim 3, characterized in that, Calculate the adjustment compensation temperature corresponding to the initial compensation temperature based on the first comparison result obtained from the comparison, including: If the first comparison result shows that the initial compensation temperature is greater than the full compensation temperature, the initial compensation temperature is taken as the base compensation temperature. The obtained base compensation temperature and the preset maximum compensation temperature are compared, and the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the second comparison result.

8. The method according to claim 6 or 7, characterized in that, The adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the second comparison result obtained from the comparison, including: Obtain the configuration information of the air conditioning system, and obtain the correction coefficient corresponding to the obtained configuration information according to the correspondence between the configuration information and the correction coefficient; If the obtained basic compensation temperature is not greater than the maximum compensation temperature, the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the obtained correction coefficient and the calculated basic compensation temperature. If the obtained base compensation temperature is greater than the maximum compensation temperature, the adjustment compensation temperature corresponding to the initial compensation temperature is calculated based on the obtained correction coefficient and the maximum compensation temperature.

9. An exhaust temperature detection device, characterized in that, The exhaust temperature detection device includes a memory and a processor, wherein the memory is configured to store an executable program; The processor is configured to read and execute the executable program to perform the exhaust temperature detection method as described in any one of claims 1-8.

10. An air conditioning system, characterized in that, include: The compressor, the exhaust temperature sensor mounted on top of the compressor, and the exhaust temperature detection device as described in claim 9.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium contains a computer program, wherein when the computer program is executed by a processor, it can implement the exhaust temperature detection method as described in any one of claims 1-8.

Images