Method and device for determining environment temperature of air conditioning system

Abstract

The invention discloses a method and device for determining the environment temperature of an air conditioning system. The method comprises the steps that the running state of the air conditioning system is determined; the operation state comprises a shutdown state, a refrigeration mode and a heating mode; according to the operation state, the condensation pressure, the condensation temperature or the evaporation temperature of the air conditioning system is determined; the environment temperature of the air conditioning system is determined according to the condensation pressure and the corresponding relation between the condensation pressure and the environment temperature; or the environment temperature of the air conditioning system is determined according to the condensation temperature and the first preset temperature; or the environment temperature of the air conditioning system is determined according to the evaporation temperature and a second preset temperature. The method is not influenced by errors and precision of a temperature sensor, and the accuracy of environment temperature measurement is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a method and device for determining the ambient temperature of an air conditioning system. Background Art

[0002] Currently, the ambient temperature of air conditioning systems is typically measured using an NTC temperature sensor installed on the heat exchanger. An NTC temperature sensor is a thermistor or probe whose resistance decreases rapidly as temperature rises. The corresponding temperature (i.e., the ambient temperature) is determined by looking up the resistance value in a table.

[0003] However, this method has two issues: the temperature value obtained by looking up the resistance table is preset and fixed, and the NTC temperature sensor may read different temperatures depending on the location of the data. For example, if the ambient temperature in a certain location is 28°C, the sensor may read 35°C due to being exposed to sunlight, resulting in a higher reading. In winter, snow may fall on the sensor, causing the reading to be lower. Furthermore, the accuracy of NTC temperature sensors is generally ±1°C, so there will be a deviation between the obtained ambient temperature and the actual ambient temperature. The sensor itself also has certain errors, which are inevitable. Therefore, when using an NTC temperature sensor, the ambient temperature obtained will be erroneous, resulting in inaccurate judgment results. Summary of the Invention

[0004] The present invention provides a method and device for determining the ambient temperature of an air-conditioning system, which can be unaffected by the error and precision of a temperature sensor and ensure the accuracy of ambient temperature measurement.

[0005] According to one aspect of the present invention, a method for determining the ambient temperature of an air-conditioning system is provided, comprising:

[0006] Determine the operating status of the air conditioning system; the operating status includes shutdown state, cooling mode and heating mode;

[0007] Determine the condensing pressure, condensing temperature or evaporating temperature of the air conditioning system according to the operating status;

[0008] The ambient temperature of the air-conditioning system is determined based on the condensing pressure and the corresponding relationship between the condensing pressure and the ambient temperature; or, the ambient temperature of the air-conditioning system is determined based on the condensing temperature and the first preset temperature; or, the ambient temperature of the air-conditioning system is determined based on the evaporating temperature and the second preset temperature.

[0009] Optionally, the air conditioning system includes an evaporator, a compressor, and a condenser; the evaporator is connected to the inlet of the compressor, the outlet of the compressor is connected to the condenser, the first pressure sensor is used to detect a first pressure between the compressor and the condenser, and the second pressure sensor is used to detect a second pressure between the compressor and the evaporator;

[0010] Determine the condensing pressure, condensing temperature or evaporating temperature of the air conditioning system according to the operating status, including:

[0011] When the operating state is a shutdown state, obtaining a first pressure and a second pressure;

[0012] determining a balance pressure of the air conditioning system based on the first pressure and the second pressure;

[0013] The condensing pressure of the air conditioning system is determined based on the equilibrium pressure and the preset deviation coefficient.

[0014] Optionally, the preset deviation coefficient ranges from 0.89 to 0.93.

[0015] Optionally, the air conditioning system includes: a compressor and a condenser; the outlet of the compressor is connected to the condenser, and the first pressure sensor is used to detect a first pressure between the compressor and the condenser;

[0016] Determine the condensing pressure, condensing temperature or evaporating temperature of the air conditioning system according to the operating status, including:

[0017] When the operating state is a cooling mode, obtaining a first pressure;

[0018] The condensing temperature of the air-conditioning system is determined according to the first pressure and the corresponding relationship between the first pressure and the condensing temperature.

[0019] Optionally, the ambient temperature is the difference between the condensation temperature and a first preset temperature; wherein the first preset temperature is 15°C.

[0020] Optionally, the air conditioning system includes an evaporator and a compressor; the evaporator is connected to the inlet of the compressor, and the second pressure sensor is used to detect a second pressure between the compressor and the evaporator;

[0021] Determine the condensing pressure, condensing temperature or evaporating temperature of the air conditioning system according to the operating status, including:

[0022] When the operating state is a heating mode, obtaining a second pressure;

[0023] The evaporation temperature of the air-conditioning system is determined according to the second pressure and the corresponding relationship between the second pressure and the evaporation temperature.

[0024] Optionally, the ambient temperature is the sum of the evaporation temperature and a second preset temperature, wherein the second preset temperature is 10°C.

[0025] According to another aspect of the present invention, there is provided a device for determining the ambient temperature of an air-conditioning system, comprising:

[0026] A state determination module is used to determine the operating state of the air conditioning system; the operating state includes shutdown state, cooling mode and heating mode;

[0027] a parameter determination module for determining the condensing pressure, condensing temperature or evaporating temperature of the air conditioning system according to the operating status;

[0028] The ambient temperature determination module is used to determine the ambient temperature of the air-conditioning system based on the condensing pressure and the corresponding relationship between the condensing pressure and the ambient temperature; or to determine the ambient temperature of the air-conditioning system based on the condensing temperature and a first preset temperature; or to determine the ambient temperature of the air-conditioning system based on the evaporating temperature and a second preset temperature.

[0029] Optionally, the air conditioning system includes an evaporator, a compressor, and a condenser; the evaporator is connected to the inlet of the compressor, the outlet of the compressor is connected to the condenser, the first pressure sensor is used to detect a first pressure between the compressor and the condenser, and the second pressure sensor is used to detect a second pressure between the compressor and the evaporator;

[0030] Parameter determination module, including:

[0031] a pressure acquisition unit, configured to acquire a first pressure and a second pressure when the operating state is a shutdown state;

[0032] a balance pressure determination unit, configured to determine a balance pressure of the air conditioning system according to the first pressure and the second pressure;

[0033] The condensing pressure determining unit is used to determine the condensing pressure of the air conditioning system according to the equilibrium pressure and a preset deviation coefficient.

[0034] Optionally, the preset deviation coefficient ranges from 0.89 to 0.93.

[0035] The method for determining the ambient temperature of an air-conditioning system provided by the technical solution of an embodiment of the present invention includes: determining the operating state of the air-conditioning system; the operating state includes a shutdown state, a cooling mode, and a heating mode; determining the condensing pressure, condensing temperature, or evaporating temperature of the air-conditioning system based on the operating state; determining the ambient temperature of the air-conditioning system based on the condensing pressure, the corresponding relationship between the condensing pressure and the ambient temperature; or determining the ambient temperature of the air-conditioning system based on the condensing temperature and a first preset temperature; or determining the ambient temperature of the air-conditioning system based on the evaporating temperature and a second preset temperature. The embodiment of the present invention simulates and calculates the ambient temperature by simulating the equilibrium pressure, evaporating temperature, and condensing temperature of the air-conditioning system. This method is not affected by the error and accuracy of the temperature sensor; it can be applied to calculations in any scenario, and can eliminate external interference factors such as sunlight, snowflakes, and ice that cause inaccurate ambient temperature measurements by the temperature sensor, thereby improving the accuracy of ambient temperature judgment; and it can also save unit development costs and improve product competitiveness.

[0036] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 This is a flow chart of a method for determining the ambient temperature of an air-conditioning system provided by an embodiment of the present invention.

[0039] Figure 2 This is a flow chart of another method for determining the ambient temperature of an air-conditioning system provided by an embodiment of the present invention.

[0040] Figure 3 This is a flow chart of another method for determining the ambient temperature of an air-conditioning system provided by an embodiment of the present invention.

[0041] Figure 4 This is a flow chart of another method for determining the ambient temperature of an air-conditioning system provided by an embodiment of the present invention.

[0042] Figure 5 Schematic diagram of a device for determining the ambient temperature of an air-conditioning system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0044] It should be noted that the terms "first," "second," and the like in the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatuses.

[0045] The embodiment of the present invention provides a method for determining the ambient temperature of an air conditioning system. Figure 1 This is a flow chart of a method for determining the ambient temperature of an air conditioning system provided by an embodiment of the present invention, with reference to Figure 1 , determination methods include:

[0046] S110, determining the operating state of the air conditioning system; the operating state includes a shutdown state, a cooling mode, and a heating mode.

[0047] The operating state of the air conditioning system can be determined by the control chip of the air conditioning. When the air conditioning system stops operating, the air conditioning system is in a shutdown state.

[0048] In cooling mode, a low-temperature, low-pressure gaseous refrigerant is drawn into the compressor. This refrigerant, acting as a refrigerant, is compressed into a high-temperature, high-pressure gaseous refrigerant, carrying a significant amount of heat. This high-temperature, high-pressure gaseous refrigerant enters the condenser, where a fan dissipates the heat into the outdoor air, condensing it into a medium-temperature, high-pressure liquid. The liquid refrigerant is throttled by the expansion valve, becoming a low-temperature, low-pressure gas-liquid mixture that enters the indoor unit's evaporator. The indoor unit's fan blows indoor air through the evaporator, where the low-temperature refrigerant absorbs heat from the air, lowering its temperature. Simultaneously, the refrigerant evaporates into a gaseous state, which is then drawn into the compressor, completing the cycle.

[0049] In heating mode, the low-temperature, low-pressure gaseous refrigerant is compressed into a high-temperature, high-pressure gas, similar to cooling mode. This high-temperature, high-pressure refrigerant enters the condenser, where a fan releases heat into the indoor air, condensing the refrigerant into a medium-temperature, high-pressure liquid. The liquid refrigerant is throttled by the expansion valve, becoming a low-temperature, low-pressure gas-liquid mixture that enters the evaporator. The evaporator absorbs heat from the outdoor air, evaporating the refrigerant into a gaseous state that is then drawn into the compressor, completing the cycle.

[0050] S120: Determine the condensing pressure, condensing temperature, or evaporating temperature of the air conditioning system according to the operating status.

[0051] If the air conditioning system is in shutdown mode, the condensing pressure of the air conditioning system must be determined. This refers to the condensing pressure at ambient temperature. The condensing pressure is determined by the equilibrium pressure, which is related to both the ambient temperature and the characteristics of the refrigerant. The equilibrium pressure refers to the pressure value when the low pressure between the compressor and evaporator and the high pressure between the compressor and condenser are equal when the air conditioning system is in shutdown mode. The condensing temperature can be determined based on the high pressure between the compressor and condenser. The corresponding relationship between high pressure and condensing temperature can be found in the refrigerant's standard parameters, allowing the condensing temperature to be determined. The evaporating temperature can be determined based on the low pressure between the compressor and evaporator. The corresponding relationship between low pressure and evaporating temperature can be found in the refrigerant's standard parameters, allowing the evaporating temperature to be determined.

[0052] S130. Determine the ambient temperature of the air-conditioning system according to the condensing pressure and the corresponding relationship between the condensing pressure and the ambient temperature; or determine the ambient temperature of the air-conditioning system according to the condensing temperature and a first preset temperature; or determine the ambient temperature of the air-conditioning system according to the evaporating temperature and a second preset temperature.

[0053] Among them, in the correspondence between condensing pressure and ambient temperature, each condensing pressure corresponds to an ambient temperature, and the ambient temperature of the air conditioning system can be determined based on the condensing pressure. Table 1 is a table of the correspondence between condensing pressure and ambient temperature, as shown in Table 1:

[0054] Table 1

[0055]

[0056] The ambient temperature of the air conditioning system is determined based on the condensing temperature and a first preset temperature. The first preset temperature may be determined based on the selection of a condenser during the design and development phase of the air conditioning system. The condenser selection during the design and development phase of the air conditioning system is based on the principle that the condensing temperature corresponding to the high pressure between the compressor and the condenser should be higher than the ambient temperature by the first preset temperature. For example, the first preset temperature may be 15°C.

[0057] The ambient temperature of the air-conditioning system is determined based on the evaporating temperature and the second preset temperature; the second preset temperature can be determined based on the selection of the evaporator during the design and development stage of the air-conditioning system. When the evaporator is selected during the design and development stage of the air-conditioning system, the evaporating temperature corresponding to the low pressure between the compressor and the evaporator is lower than the ambient temperature by a second preset temperature. Exemplarily, the second preset temperature may include 10°C. The embodiment of the present invention simulates and calculates the ambient temperature through the equilibrium pressure, evaporating temperature, and condensing temperature of the air-conditioning system. This method is not affected by the error and accuracy of the temperature sensor; it can be applied to any scenario for calculation, and can eliminate the inaccurate ambient temperature measured by the sensor due to external interference factors such as sunlight, snowflakes, and ice, thereby improving the accuracy of ambient temperature judgment; at the same time, it can also save the cost of unit development and improve product competitiveness.

[0058] The method for determining the ambient temperature of an air-conditioning system provided by the technical solution of an embodiment of the present invention includes: determining the operating state of the air-conditioning system; the operating state includes a shutdown state, a cooling mode, and a heating mode; determining the condensing pressure, condensing temperature, or evaporating temperature of the air-conditioning system based on the operating state; determining the ambient temperature of the air-conditioning system based on the condensing pressure, the corresponding relationship between the condensing pressure and the ambient temperature; or determining the ambient temperature of the air-conditioning system based on the condensing temperature and a first preset temperature; or determining the ambient temperature of the air-conditioning system based on the evaporating temperature and a second preset temperature. The embodiment of the present invention simulates and calculates the ambient temperature by simulating the equilibrium pressure, evaporating temperature, and condensing temperature of the air-conditioning system. This method is not affected by the error and accuracy of the temperature sensor; it can be applied to calculations in any scenario, and can eliminate external interference factors such as sunlight, snowflakes, and ice that cause inaccurate ambient temperature measurements by the temperature sensor, thereby improving the accuracy of ambient temperature judgment; and it can also save unit development costs and improve product competitiveness.

[0059] Optionally, the air-conditioning system includes; an evaporator, a compressor and a condenser; the evaporator is connected to the inlet of the compressor, the outlet of the compressor is connected to the condenser, the first pressure sensor is used to detect a first pressure between the compressor and the condenser, and the second pressure sensor is used to detect a second pressure between the compressor and the evaporator.

[0060] The compressor outlet is connected to the condenser via a high-pressure pipeline. The first pressure sensor is used to detect the high pressure on the high-pressure pipeline between the compressor and condenser, which is referred to as the first pressure. The evaporator is connected to the compressor inlet via a low-pressure pipeline. The second pressure sensor is used to detect the low pressure between the compressor and evaporator, which is referred to as the second pressure.

[0061] Figure 2 This is a flow chart of another method for determining the ambient temperature of an air-conditioning system provided by an embodiment of the present invention, with reference to Figure 2 , determination methods include:

[0062] S110, determining the operating state of the air conditioning system; the operating state includes a shutdown state, a cooling mode, and a heating mode.

[0063] S121. When the operating state is the shutdown state, obtain a first pressure and a second pressure.

[0064] The first pressure is the high pressure on the high-pressure line between the compressor and the condenser, and is detected by a first pressure sensor on the high-pressure line via the air conditioning system's control chip. The second pressure is the low pressure on the low-pressure line between the compressor and the evaporator, and is detected by a second pressure sensor on the low-pressure line via the air conditioning system's control chip.

[0065] S122: Determine a balance pressure of the air-conditioning system according to the first pressure and the second pressure.

[0066] Among them, when the air-conditioning system is in a shutdown state, the equilibrium pressure of the air-conditioning system in the shutdown state can be determined based on the first pressure and the second pressure. The equilibrium pressure refers to the pressure value when the first pressure and the second pressure are equal when the air-conditioning system is in a shutdown state.

[0067] S123. Determine the condensing pressure of the air conditioning system according to the equilibrium pressure and a preset deviation coefficient.

[0068] The preset deviation coefficient may be based on a deviation coefficient between the equilibrium pressure and the condensing pressure obtained experimentally. The preset deviation coefficient ranges from 0.89 to 0.93. For example, the preset deviation coefficient may be 0.89, 0.9, 0.91, 0.92, 0.93, etc. The condensing pressure of the air-conditioning system is the condensing pressure Pc at ambient temperature. The condensing pressure of the air-conditioning system is determined based on the equilibrium pressure and the preset deviation coefficient. The condensing pressure at ambient temperature may be equal to the equilibrium pressure multiplied by the preset deviation coefficient.

[0069] S131. Determine the ambient temperature of the air-conditioning system according to the condensing pressure and the corresponding relationship between the condensing pressure and the ambient temperature.

[0070] In an embodiment of the present invention, when the air conditioning system is in a stopped state, the equilibrium pressure of the air conditioning system can be determined based on a first pressure and a second pressure. Furthermore, the condensing pressure of the air conditioning system at ambient temperature can be determined based on the equilibrium pressure and a preset deviation coefficient. Finally, the ambient temperature of the air conditioning system can be determined based on the condensing pressure and the corresponding relationship between the condensing pressure and the ambient temperature. This method is unaffected by the errors and accuracy of the temperature sensor; it can be applied to calculations in any scenario and can eliminate inaccuracies in ambient temperature measurements caused by external interference factors such as sunlight, snowflakes, and ice, thereby improving the accuracy of ambient temperature determination. It can also reduce unit development costs and enhance product competitiveness.

[0071] Optionally, the air-conditioning system includes: a compressor and a condenser; the outlet of the compressor is connected to the condenser, and the first pressure sensor is used to detect a first pressure between the compressor and the condenser; according to the operating state, the condensing pressure, condensing temperature or evaporating temperature of the air-conditioning system is determined, including: when the operating state is a cooling mode, obtaining the first pressure; determining the condensing temperature of the air-conditioning system based on the first pressure and the corresponding relationship between the first pressure and the condensing temperature.

[0072] Specifically, Figure 3 This is a flow chart of another method for determining the ambient temperature of an air-conditioning system provided by an embodiment of the present invention, with reference to Figure 3 , determination methods include:

[0073] S110, determining the operating state of the air conditioning system; the operating state includes a shutdown state, a cooling mode, and a heating mode.

[0074] S1201. When the operating state is a cooling mode, obtain a first pressure.

[0075] The compressor outlet is connected to the condenser via a high-pressure pipeline. The first pressure sensor is configured to detect a high-pressure pressure on the high-pressure pipeline between the compressor and the condenser, where the high-pressure pressure is referred to as a first pressure. The first pressure on the high-pressure pipeline detected by the first pressure sensor is obtained by a control chip of the air conditioning system.

[0076] S1202: Determine the condensing temperature of the air-conditioning system according to the first pressure and the corresponding relationship between the first pressure and the condensing temperature.

[0077] The condensing temperature may be determined based on the first pressure between the compressor and the condenser. The corresponding relationship between the first pressure and the condensing temperature may be found in the rule parameters of the refrigerant, so that the condensing temperature may be determined based on the first pressure.

[0078] S132: Determine the ambient temperature of the air-conditioning system according to the condensing temperature and the first preset temperature.

[0079] The first preset temperature value is 15° C.; the ambient temperature is the difference between the condensation temperature and the first preset temperature.

[0080] In cooling mode, an air-conditioning system according to an embodiment of the present invention first obtains a first pressure, then determines the condensing temperature of the air-conditioning system based on the first pressure and the corresponding relationship between the first pressure and the condensing temperature; and then determines the ambient temperature of the air-conditioning system based on the condensing temperature and a first preset temperature. This method is unaffected by the error and accuracy of the temperature sensor and can be applied to calculations in any scenario. It can eliminate inaccuracies in ambient temperature measurements by the temperature sensor caused by external interference factors such as sunlight, snowflakes, and ice, thereby improving the accuracy of ambient temperature determination. It can also save unit development costs and enhance product competitiveness.

[0081] Optionally, the air-conditioning system includes: an evaporator and a compressor; the evaporator is connected to the inlet of the compressor, and a second pressure sensor is used to detect a second pressure between the compressor and the evaporator; according to the operating state, the condensing pressure, condensing temperature or evaporating temperature of the air-conditioning system is determined, including: when the operating state is heating mode, obtaining the second pressure; determining the evaporating temperature of the air-conditioning system based on the second pressure and the corresponding relationship between the second pressure and the evaporating temperature.

[0082] Specifically, Figure 4 This is a flow chart of another method for determining the ambient temperature of an air-conditioning system provided by an embodiment of the present invention, with reference to Figure 4 , determination methods include:

[0083] S110, determining the operating state of the air conditioning system; the operating state includes a shutdown state, a cooling mode, and a heating mode.

[0084] S12001. When the operating state is heating mode, obtain the second pressure.

[0085] The evaporator is connected to the inlet of the compressor via a low-pressure pipeline. The second pressure sensor is used to detect the low pressure on the low-pressure pipeline between the compressor and the evaporator, where the low pressure is the second pressure. The second pressure on the low-pressure pipeline detected by the second pressure sensor is obtained by the control chip of the air conditioning system.

[0086] S12002. Determine the evaporation temperature of the air-conditioning system according to the second pressure and the corresponding relationship between the second pressure and the evaporation temperature.

[0087] The evaporation temperature can be determined based on the second pressure between the compressor and the evaporator. The corresponding relationship between the second pressure and the evaporation temperature can be found in the regular parameters of the refrigerant, so that the evaporation temperature can be determined.

[0088] S133: Determine the ambient temperature of the air-conditioning system according to the evaporation temperature and the second preset temperature.

[0089] The second preset temperature is 10° C., and the ambient temperature is the sum of the evaporation temperature and the second preset temperature.

[0090] In heating mode, the air conditioning system of this embodiment of the present invention first obtains a second pressure. The evaporation temperature of the air conditioning system is determined based on the second pressure and the corresponding relationship between the second pressure and the evaporation temperature. The condensation temperature of the air conditioning system is determined based on the first pressure and the corresponding relationship between the first pressure and the condensation temperature. The ambient temperature of the air conditioning system is determined based on the evaporation temperature and the second preset temperature. This method is unaffected by the error and accuracy of the temperature sensor and can be applied to calculations in any scenario. It can eliminate external interference factors such as sunlight, snowflakes, and ice that can cause inaccurate ambient temperature measurements by the temperature sensor, thereby improving the accuracy of ambient temperature determination. It can also save unit development costs and enhance product competitiveness.

[0091] The embodiment of the present invention provides a device for determining the ambient temperature of an air-conditioning system based on the above embodiment. Figure 5 This is a schematic diagram of a device for determining the ambient temperature of an air-conditioning system provided by an embodiment of the present invention, with reference to Figure 5 , the determining device includes:

[0092] The state determination module 210 is used to determine the operating state of the air conditioning system; the operating state includes the shutdown state, cooling mode and heating mode;

[0093] a parameter determination module 220 for determining the condensing pressure, condensing temperature or evaporating temperature of the air conditioning system according to the operating state;

[0094] The ambient temperature determination module 230 is used to determine the ambient temperature of the air-conditioning system based on the condensing pressure and the corresponding relationship between the condensing pressure and the ambient temperature; or, to determine the ambient temperature of the air-conditioning system based on the condensing temperature and the first preset temperature; or, to determine the ambient temperature of the air-conditioning system based on the evaporating temperature and the second preset temperature.

[0095] Optionally, the air conditioning system includes an evaporator, a compressor, and a condenser; the evaporator is connected to the inlet of the compressor, the outlet of the compressor is connected to the condenser, the first pressure sensor is used to detect a first pressure between the compressor and the condenser, and the second pressure sensor is used to detect a second pressure between the compressor and the evaporator;

[0096] Parameter determination module, including:

[0097] a pressure acquisition unit, configured to acquire a first pressure and a second pressure when the operating state is a shutdown state;

[0098] a balance pressure determination unit, configured to determine a balance pressure of the air conditioning system according to the first pressure and the second pressure;

[0099] The condensing pressure determining unit is used to determine the condensing pressure of the air conditioning system according to the equilibrium pressure and a preset deviation coefficient.

[0100] Optionally, the preset deviation coefficient ranges from 0.89 to 0.93.

[0101] The air conditioning system includes: a compressor and a condenser; the outlet of the compressor is connected to the condenser, and the first pressure sensor is used to detect a first pressure between the compressor and the condenser;

[0102] Parameter determination module, including:

[0103] A first pressure acquisition unit, configured to acquire a first pressure when the operating state is a cooling mode;

[0104] The condensing temperature determining unit is configured to determine the condensing temperature of the air-conditioning system according to the first pressure and the corresponding relationship between the first pressure and the condensing temperature.

[0105] Optionally, the ambient temperature is the difference between the condensation temperature and a first preset temperature; wherein the first preset temperature is 15°C.

[0106] Optionally, the air conditioning system includes an evaporator and a compressor; the evaporator is connected to the inlet of the compressor, and the second pressure sensor is used to detect a second pressure between the compressor and the evaporator;

[0107] Parameter determination module, including:

[0108] A second pressure acquisition unit, configured to acquire a second pressure when the operating state is a heating mode;

[0109] The evaporation temperature determination unit is used to determine the evaporation temperature of the air-conditioning system according to the second pressure and the corresponding relationship between the second pressure and the evaporation temperature.

[0110] Optionally, the ambient temperature is the sum of the evaporation temperature and a second preset temperature, wherein the second preset temperature is 10°C.

[0111] The device for determining the air-conditioning ambient temperature provided by the technical solution of the embodiment of the present invention has the same beneficial effects as the method for determining the air-conditioning ambient temperature described in any embodiment of the present invention.

[0112] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0113] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A method for determining the ambient temperature of an air conditioning system, characterized in that: include: Determine the operating state of the air conditioning system; the operating state includes a shutdown state, a cooling mode, and a heating mode; determining a condensing pressure, a condensing temperature, or an evaporating temperature of the air conditioning system according to the operating state; The ambient temperature of the air-conditioning system is determined based on the condensing pressure and the corresponding relationship between the condensing pressure and the ambient temperature; or, the ambient temperature of the air-conditioning system is determined based on the condensing temperature and a first preset temperature; or, the ambient temperature of the air-conditioning system is determined based on the evaporating temperature and a second preset temperature.

2. The determination method according to claim 1, characterized in that The air conditioning system comprises an evaporator, a compressor and a condenser; the evaporator is connected to the inlet of the compressor, the outlet of the compressor is connected to the condenser, a first pressure sensor is used to detect a first pressure between the compressor and the condenser, and a second pressure sensor is used to detect a second pressure between the compressor and the evaporator; Determining the condensing pressure, condensing temperature, or evaporating temperature of the air conditioning system according to the operating state includes: When the operating state is the shutdown state, obtaining the first pressure and the second pressure; determining a balance pressure of the air conditioning system according to the first pressure and the second pressure; The condensing pressure of the air conditioning system is determined according to the equilibrium pressure and a preset deviation coefficient.

3. The determination method according to claim 2, characterized in that: The preset deviation coefficient ranges from 0.89 to 0.

93.

4. The determination method according to claim 1, characterized in that The air conditioning system includes: a compressor and a condenser; the outlet of the compressor is connected to the condenser, and the first pressure sensor is used to detect a first pressure between the compressor and the condenser; Determining the condensing pressure, condensing temperature, or evaporating temperature of the air conditioning system according to the operating state includes: When the operating state is the cooling mode, obtaining the first pressure; The condensing temperature of the air-conditioning system is determined according to the first pressure and a corresponding relationship between the first pressure and the condensing temperature.

5. The determination method according to claim 1, characterized in that: The ambient temperature is the difference between the condensing temperature and the first preset temperature; wherein the first preset temperature is 15°C.

6. The determination method according to claim 1, characterized in that: The air conditioning system comprises an evaporator and a compressor; the evaporator is connected to the inlet of the compressor, and the second pressure sensor is used to detect a second pressure between the compressor and the evaporator; Determining the condensing pressure, condensing temperature, or evaporating temperature of the air conditioning system according to the operating state includes: When the operating state is the heating mode, obtaining the second pressure; The evaporation temperature of the air-conditioning system is determined according to the second pressure and the corresponding relationship between the second pressure and the evaporation temperature.

7. The determination method according to claim 1, characterized in that: The ambient temperature is the sum of the evaporation temperature and the second preset temperature, wherein the second preset temperature is 10°C.

8. A device for determining the ambient temperature of an air conditioning system, characterized in that: include: A state determination module, used to determine the operating state of the air conditioning system; The operating state includes a shutdown state, a cooling mode, and a heating mode; a parameter determination module, configured to determine a condensing pressure, a condensing temperature, or an evaporating temperature of the air-conditioning system according to the operating state; An ambient temperature determination module is used to determine the ambient temperature of the air-conditioning system based on the condensing pressure and the corresponding relationship between the condensing pressure and the ambient temperature; or to determine the ambient temperature of the air-conditioning system based on the condensing temperature and a first preset temperature; or to determine the ambient temperature of the air-conditioning system based on the evaporating temperature and a second preset temperature.

9. The determination device according to claim 8, characterized in that The air conditioning system comprises an evaporator, a compressor and a condenser; the evaporator is connected to the inlet of the compressor, the outlet of the compressor is connected to the condenser, a first pressure sensor is used to detect a first pressure between the compressor and the condenser, and a second pressure sensor is used to detect a second pressure between the compressor and the evaporator; Parameter determination module, including: a pressure acquisition unit, configured to acquire the first pressure and the second pressure when the operating state is the shutdown state; a balance pressure determining unit, configured to determine a balance pressure of the air-conditioning system according to the first pressure and the second pressure; The condensing pressure determining unit is used to determine the condensing pressure of the air-conditioning system according to the equilibrium pressure and a preset deviation coefficient.

10. The determination device according to claim 9, characterized in that The preset deviation coefficient ranges from 0.89 to 0.93.

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