Air conditioner control method and device, air conditioner, storage medium and program product

Abstract

The invention discloses a control method and device of an air conditioner, the air conditioner, a storage medium and a computer program product, an electric heating device of the air conditioner comprises an electric heating component and an overheating protection component, and the overheating protection component can move relative to the electric heating component; the method comprises the steps that the surface temperature of an electric heating component is determined according to the air inlet temperature and the target air outlet temperature of the electric heating device; according to the air inlet temperature, the surface temperature and the distance between the overheating protection component and the electric heating component, whether temperature abnormity occurs at the overheating protection component or not is determined; and if it is determined that the temperature is abnormal, the target position of the overheating protection component is determined according to the air inlet temperature and the surface temperature, and the overheating protection component is controlled to move to the target position. According to the scheme, by dynamically calculating the electric heating surface temperature and pre-judging the thermal risk of the protection part, the position of the protection part is automatically adjusted, overheating failure or damage of the protection part is avoided, and stable operation of the air conditioner is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and in particular relates to a control method and device for an air conditioner, an air conditioner, a storage medium, and a computer program product. Background Art

[0002] Ducted air conditioning systems, such as modular cabinets, often require auxiliary electric heating due to heating requirements. Electric heating typically comes in two forms: PTC and motor heat pipes. PTC electric heaters automatically reduce their power when wind speed is insufficient, whereas tubular electric heaters maintain this power reduction. When wind speed drops below the designed speed, the localized temperature rise in tubular electric heaters can increase, potentially causing protective devices like fuses and temperature limiters to burn out due to abnormal overheating.

[0003] The above content is only used to assist in understanding the technical solution of the present invention and does not constitute an admission that the above content is prior art. Summary of the Invention

[0004] The object of the present invention is to provide an air conditioner control method, device, air conditioner, storage medium and computer program product to solve the problem in related solutions that, in an air conditioner equipped with tubular electric heating, when the wind speed decreases, the local temperature of the tubular electric heating will rise abnormally, causing protective devices such as fuses and temperature limiters to burn out due to abnormal overheating. The purpose is to achieve the effect of dynamically calculating the surface temperature of the electric heating and predicting the thermal risk of the protective components, and then automatically adjusting the position of the protective components, thereby avoiding overheating failure or damage of the protective components, extending the equipment life and ensuring stable operation of the air conditioner.

[0005] The present invention provides a control method for an air conditioner, wherein the air conditioner includes an electric heating device; the electric heating device includes an electric heating component and an overheating protection component; the overheating protection component is movable relative to the electric heating component; the method comprises: obtaining an inlet air temperature and a target outlet air temperature of the electric heating device; obtaining a distance between the overheating protection component and the electric heating component, recorded as a first distance; determining a surface temperature of the electric heating component according to the inlet air temperature and the target outlet air temperature; determining whether a temperature anomaly occurs at the overheating protection component according to the inlet air temperature, the surface temperature, and the first distance; if it is determined that a temperature anomaly occurs at the overheating protection component, determining a target position of the overheating protection component according to the inlet air temperature and the surface temperature, and controlling the overheating protection component to move to the target position.

[0006] In some embodiments, the surface temperature of the electric heating component is determined based on the inlet air temperature and the target outlet air temperature, including: calculating the difference between the target outlet air temperature and the inlet air temperature, recorded as a first temperature difference; calculating the operating power of the electric heating component based on the first temperature difference and a preset first formula; calculating the surface temperature of the electric heating component based on the operating power, the inlet air temperature, and a preset second formula.

[0007] In some embodiments, determining whether a temperature abnormality occurs at the overheat protection component based on the inlet air temperature, the surface temperature, and the first distance includes: calculating the difference between the surface temperature and the inlet air temperature, recorded as a second temperature difference; calculating the temperature at the overheat protection component based on the second temperature difference, the surface temperature, the first distance, and a preset third formula; judging the magnitude of the temperature at the overheat protection component; if the temperature at the overheat protection component is less than the preset temperature, determining that no temperature abnormality occurs at the overheat protection component; if the temperature at the overheat protection component is greater than or equal to the preset temperature, determining that a temperature abnormality occurs at the overheat protection component.

[0008] In some embodiments, the target position of the overheating protection component is determined based on the inlet air temperature and the surface temperature, including: calculating the difference between the surface temperature and the inlet air temperature, recorded as a second temperature difference; calculating an initial distance based on the second temperature difference, the surface temperature, a preset temperature, and a preset third formula; adding a preset adjustment amount to the initial distance to obtain a target distance; and determining the position at the target distance from the electric heating component as the target position.

[0009] In some embodiments, it also includes: before determining whether a temperature abnormality occurs at the overheating protection component, within a preset distance from the electric heating component, recording the component with the lowest melting point as the target component; obtaining the distance between the target component and the electric heating component, recording it as the second distance; calculating the difference between the surface temperature and the inlet air temperature, recording it as the second temperature difference; calculating the temperature at the target component according to the second temperature difference, the surface temperature, the second distance, and a preset third formula; and controlling the operating power of the electric heating component according to the temperature at the target component.

[0010] In some embodiments, the operating power of the electric heating component is controlled according to the temperature at the target component, including: judging the relationship between the temperature at the target component and the preset safety temperature of the target component; if the temperature at the target component is lower than the preset safety temperature, maintaining the operating power of the electric heating component unchanged; if the temperature at the target component is greater than or equal to the preset safety temperature, reducing the operating power of the electric heating component until the temperature at the target component is lower than the preset safety temperature.

[0011] Matching the above method, the present invention provides a control device for an air conditioner on the other hand, the air conditioner includes an electric heating device; the electric heating device includes an electric heating component and an overheating protection component; the overheating protection component is movable relative to the electric heating component; the control device includes: an acquisition unit, configured to acquire the inlet air temperature and the target outlet air temperature of the electric heating device; acquire the distance between the overheating protection component and the electric heating component, recorded as a first distance; a control unit, configured to determine the surface temperature of the electric heating component based on the inlet air temperature and the target outlet air temperature; the control unit is further configured to determine whether a temperature abnormality occurs at the overheating protection component based on the inlet air temperature, the surface temperature, and the first distance; the control unit is further configured to determine the target position of the overheating protection component based on the inlet air temperature and the surface temperature if it is determined that a temperature abnormality occurs at the overheating protection component, and control the overheating protection component to move to the target position.

[0012] In some embodiments, the control unit determines the surface temperature of the electric heating component based on the inlet air temperature and the target outlet air temperature, including: calculating the difference between the target outlet air temperature and the inlet air temperature, recorded as a first temperature difference; calculating the operating power of the electric heating component based on the first temperature difference and a preset first formula; calculating the surface temperature of the electric heating component based on the operating power, the inlet air temperature, and a preset second formula.

[0013] In some embodiments, the control unit determines whether a temperature abnormality occurs at the overheat protection component based on the inlet air temperature, the surface temperature, and the first distance, including: calculating the difference between the surface temperature and the inlet air temperature, recorded as a second temperature difference; calculating the temperature at the overheat protection component based on the second temperature difference, the surface temperature, the first distance, and a preset third formula; judging the magnitude of the temperature at the overheat protection component; if the temperature at the overheat protection component is less than the preset temperature, determining that no temperature abnormality occurs at the overheat protection component; if the temperature at the overheat protection component is greater than or equal to the preset temperature, determining that a temperature abnormality occurs at the overheat protection component.

[0014] In some embodiments, the control unit determines the target position of the overheating protection component based on the inlet air temperature and the surface temperature, including: calculating the difference between the surface temperature and the inlet air temperature, recorded as a second temperature difference; calculating an initial distance based on the second temperature difference, the surface temperature, a preset temperature, and a preset third formula; adding a preset adjustment amount to the initial distance to obtain a target distance; and determining the position at the target distance from the electric heating component as the target position.

[0015] In some embodiments, the control unit is further configured to, before determining whether a temperature abnormality occurs at the overheating protection component, record the component with the lowest melting point within a preset distance from the electric heating component as a target component; obtain the distance between the target component and the electric heating component, record it as a second distance; calculate the difference between the surface temperature and the inlet air temperature, record it as a second temperature difference; calculate the temperature at the target component based on the second temperature difference, the surface temperature, the second distance, and a preset third formula; and control the operating power of the electric heating component based on the temperature at the target component.

[0016] In some embodiments, the control unit controls the operating power of the electric heating component according to the temperature at the target component, including: judging the relationship between the temperature at the target component and the preset safety temperature of the target component; if the temperature at the target component is lower than the preset safety temperature, maintaining the operating power of the electric heating component unchanged; if the temperature at the target component is greater than or equal to the preset safety temperature, reducing the operating power of the electric heating component until the temperature at the target component is lower than the preset safety temperature.

[0017] Matching the above device, the present invention further provides an air conditioner, comprising: the control device of the air conditioner described above.

[0018] In accordance with the above method, the present invention further provides a storage medium, which includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above-mentioned air conditioning control method.

[0019] In accordance with the above method, the present invention further provides a computer program product, which includes a computer program. When the computer program product is processed and executed, the steps of the above air conditioner control method are implemented.

[0020] The present invention provides a method in which an overheat protection component in an electric heating device is movable relative to the electric heating component. The surface temperature of the electric heating component is determined based on the inlet air temperature and the target outlet air temperature of the electric heating device. A temperature anomaly is determined at the overheat protection component based on the inlet air temperature, the surface temperature, and the distance between the overheat protection component and the electric heating component. If a temperature anomaly is determined at the overheat protection component, the target position of the overheat protection component is determined based on the inlet air temperature and the surface temperature, and the overheat protection component is controlled to move to the target position. This method dynamically calculates the surface temperature of the electric heating device and predicts thermal risks of the protection component, thereby automatically adjusting the position of the protection component, preventing overheating failure or damage to the protection component, extending the life of the equipment, and ensuring stable operation of the air conditioner.

[0021] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention.

[0022] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A flow chart of an embodiment of a method for controlling an air conditioner according to the present invention;

[0024] Figure 2 A schematic structural diagram of an embodiment of an air conditioner control device of the present invention;

[0025] Figure 3 It is a front view of the overheat protection component;

[0026] Figure 4 It is a side view of the overheat protection component;

[0027] Figure 5 It is a structural schematic diagram of an electric heating device;

[0028] Figure 6 FIG. 4 is a flow chart of another embodiment of the air conditioner control method of the present invention.

[0029] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0030] 1- movable protection device; 2- temperature limiter; 3- fuse; 4- electric heating tube; 5- electric heating frame; 6- microcomputer; 7- material; 8- air inlet temperature sensor; 102- acquisition unit; 104- control unit. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] According to an embodiment of the present invention, a control method for an air conditioner is provided, wherein the air conditioner includes an electric heating device, such as a tubular electric heater or a PTC electric heater; the electric heating device includes an electric heating component and an overheating protection component, the electric heating component includes an electric heating tube, and the overheating protection component includes a temperature limiter and a fuse; the overheating protection component is movable relative to the electric heating component.

[0033] like Figures 3 to 5 As shown, the electric heating device comprises an electric heating tube 4, a movable protective device 1, and a microcomputer 6. The movable protective device 1, or overheat protection component, includes a temperature limiter 2 and a fuse 3. The movable protective device 1 can move up and down along the heating frame 5 of the electric heating device, changing the distance between the electric heating tube 4 and the movable protective device 1. The microcomputer 6 reads parameter information from sensors (such as the air inlet temperature sensor 8) to control the motor speed, electric heating power, and the position of the movable protective device, thereby achieving self-regulation of the electric heating and unit protection.

[0034] like Figure 1 FIG. 1 is a flow chart of an embodiment of the method of the present invention. The air conditioner control method may include steps S110 to S140.

[0035] In step S110, the air inlet temperature of the electric heating device and the target air outlet temperature set by the user are obtained; and the distance between the overheating protection component and the electric heating component is obtained, which is recorded as a first distance.

[0036] The electric heating device is provided with a laser distance measuring component, which can measure the distance between other components or elements in the electric heating device and the electric heating component. The inlet air temperature of the electric heating device is collected by the inlet air temperature sensing package 8.

[0037] In step S120 , the surface temperature of the electric heating component is determined according to the inlet air temperature and the target outlet air temperature.

[0038] The surface temperature of electric heating tubes is a key factor contributing to overheating risk, but it's difficult to measure directly in practice. This solution addresses this temperature measurement challenge by inferring the surface temperature based on the inlet air temperature and the target outlet air temperature.

[0039] In some embodiments, in step S120, the specific process of determining the surface temperature of the electric heating component according to the inlet air temperature and the target outlet air temperature includes: steps S210 to S230.

[0040] Step S210: Calculate the difference between the target air outlet temperature and the air inlet temperature, which is recorded as a first temperature difference.

[0041] Step S220: Calculate the operating power of the electric heating component according to the first temperature difference and a preset first formula.

[0042] The first preset formula is: P = (L × △ T1) ÷ 3000 ÷ θ. P is the operating power of the electric heating component, in KW; L is the air supply volume, in m 3 / h; ΔT1 is the first temperature difference, reflecting the required temperature rise of the electric heating device: ΔT1 = target outlet temperature - inlet temperature; θ is the electric heating efficiency, which can be set to 85%. The calculated operating power is the power required to achieve the target outlet temperature. Once this operating power is calculated, the electric heating device is controlled to operate at this power. Dynamic power calculation based on actual temperature rise requirements avoids energy waste or insufficient heating caused by fixed power mode.

[0043] Step S230: Calculate the surface temperature of the electric heating component according to the operating power, the air inlet temperature, and a preset second formula.

[0044] The second preset formula is: T s =T in +P / (h*A). T s is the surface temperature of the electric heating component, T in is the inlet air temperature, A is the effective heat dissipation area of the electric heating element, and P is the operating power of the electric heating element. h is the convective heat transfer coefficient, which is related to factors such as air flow rate and heating tube diameter. That is, the larger P is, the more heat is generated per unit time and the higher the surface temperature is. The smaller h is (e.g., when wind speed decreases), the lower the heat dissipation efficiency is and the higher the surface temperature is. The larger A is, the larger the heat dissipation area is and the lower the surface temperature is.

[0045] By calculating the difference between the inlet air temperature and the target outlet air temperature, and combining it with a preset formula to dynamically determine the operating power and surface temperature of the electric heating component, a precise match between the electric heating power and the actual temperature rise requirement is achieved, the surface temperature prediction accuracy is improved, and the system's adaptability to different ambient temperatures and air volume fluctuations is enhanced.

[0046] In step S130 , it is determined whether a temperature abnormality occurs at the overheat protection component based on the inlet air temperature, the surface temperature, and the first distance.

[0047] When the wind speed of the system decreases, the heat dissipation efficiency of the electric heating component and the air convection decreases, the air flow slows down, and the heat cannot be evenly diffused, resulting in heat accumulation in local areas (such as the middle of the electric heating tube). The overheating protection component is usually installed close to the electric heating component. When the wind speed decreases, the temperature at its location rises rapidly due to the weakening of convection, far exceeding the design tolerance range. Therefore, it is necessary to combine parameters such as the inlet air temperature and the surface temperature of the electric heating component to determine whether there is a temperature abnormality at the current overheating protection component. If the temperature is abnormal, move the electric heating component to place the overheating protection component at a position with a temperature suitable for its operation to ensure the normal operation of the overheating protection component.

[0048] In some embodiments, in step S130, the specific process of determining whether a temperature abnormality occurs at the overheat protection component based on the inlet air temperature, the surface temperature, and the first distance includes: steps S310 to S330.

[0049] Step S310: Calculate the difference between the surface temperature and the inlet air temperature, and record it as a second temperature difference.

[0050] Step S320: Calculate the temperature of the overheat protection component according to the second temperature difference, the surface temperature, the first distance, and a preset third formula.

[0051] The third formula is preset as: T(x)=T s -ΔT2·(1-ex / L), x is the distance between the overheat protection component and the electric heating component, T(x) is the temperature at the overheat protection component, T s is the surface temperature of the electric heating component; ΔT2 is the second temperature difference, ΔT2 = surface temperature - inlet air temperature; L is the temperature attenuation length, which is related to the wind speed and convection heat transfer coefficient.

[0052] By non-contactly estimating the temperature of the protected components, there is no need to install temperature sensors in high-temperature areas, reducing hardware costs.

[0053] Step S330, determining the temperature of the overheat protection component; if the temperature of the overheat protection component is less than a preset temperature, determining that no temperature abnormality occurs at the overheat protection component; if the temperature of the overheat protection component is greater than or equal to the preset temperature, determining that a temperature abnormality occurs at the overheat protection component.

[0054] The preset temperature is the safe operating temperature limit for the thermal protection component. If the thermal protection component includes multiple components, the lowest safe operating temperature limit is used as the preset temperature. For example, if the temperature limiter in the thermal protection component is set at 65°C and the fuse is 105°C, the preset temperature is 65°C. When the temperature at the thermal protection component is less than the preset temperature, the thermal protection component is functioning normally and no temperature anomaly is considered. When the temperature at the thermal protection component is greater than or equal to the preset temperature, the thermal protection component is likely to malfunction or even be damaged. In this case, a temperature anomaly is considered and the temperature of the thermal protection component needs to be lowered promptly.

[0055] By calculating the difference between the surface temperature of the electric heating component and the inlet air temperature, dynamically calculating the temperature of the overheating protection component in combination with the thermal attenuation model, and comparing it with the preset temperature threshold to determine abnormalities, non-contact and accurate prediction of the protection component temperature is achieved, avoiding the hardware loss of direct temperature measurement in high-temperature areas, and improving the accuracy of risk judgment, significantly enhancing the safety and reliability of the air-conditioning electric heating system.

[0056] In step S140 , if it is determined that a temperature abnormality occurs at the overheat protection component, a target position of the overheat protection component is determined according to the inlet air temperature and the surface temperature, and the overheat protection component is controlled to move to the target position.

[0057] This solution calculates the surface temperature of the electric heating component and determines whether the temperature at the overheating protection component is abnormal, and then dynamically adjusts the position of the overheating protection component. This achieves active prediction and precise protection against overheating risks of the electric heating device, avoids overheating and burning of the protection component due to factors such as decreased wind speed, improves the system's adaptability to different working conditions, and extends the service life of the electric heating device and protection components. At the same time, it optimizes the spatial layout and thermal management efficiency through dynamic closed-loop control, combining safety, reliability and economy.

[0058] In some embodiments, in step S140, the specific process of determining the target position of the overheating protection component based on the inlet air temperature and the surface temperature includes: calculating the difference between the surface temperature and the inlet air temperature, recorded as a second temperature difference; calculating the initial distance based on the second temperature difference, the surface temperature, a preset temperature, and a preset third formula; adding a preset adjustment amount to the initial distance to obtain a target distance; and determining the position at the target distance from the electric heating component as the target position.

[0059] For the preset third formula T(x)=T s -ΔT2·(1-ex / L), after determining the temperature difference ΔT2, surface temperature T sAfter determining the preset temperature T(x), the distance x can be inferred. The temperature at the initial distance is the preset temperature. A preset adjustment is then added to the initial distance to provide a safety margin, ensuring the normal and stable operation of the overheat protection component. If the air outlet is suddenly blocked (due to an abnormality such as a damper actuator) or the control system (electric heater, fan) fails, and the temperature at the target location exceeds the maximum temperature tolerance of the overheat protection component, protection is activated.

[0060] By calculating the difference between the surface temperature and the inlet air temperature, combining it with the thermal attenuation model to infer the critical safety distance of the overheating protection component, and increasing the preset adjustment amount to form the target position, dynamic optimization of the overheating protection component position is achieved. While ensuring safety, the spatial layout is optimized, significantly improving the reliability and adaptability of the air-conditioning electric heating system.

[0061] In some embodiments, the process further includes controlling the electric heating power to prevent damage to components around the electric heating component. The process specifically includes: steps S410 to S440.

[0062] Step S410: Before determining whether a temperature abnormality occurs at the overheat protection component, record the component with the lowest melting point within a preset distance from the electric heating component as the target component; obtain the distance between the target component and the electric heating component, and record it as the second distance.

[0063] Within the preset distance around the electric heating component, select the components with the lowest melting point as the protection object. For example, within the 10CM range around the electric heating tube, there are plastic brackets (melting point 120℃) and metal fixings (melting point 1500℃), then select the plastic bracket as the target component. Figure 5 As shown, material 7 is the material with the lowest melting point near the electric heater, serving as the electrode humidification tank. Components with the lowest melting points in the system are the weakest links in thermal safety. By identifying these weak points, targeted protection can be implemented to avoid risks such as short circuits and fires caused by localized overheating. In some embodiments, components with the highest thermal sensitivity can be selected as target components.

[0064] Step S420: Calculate the difference between the surface temperature and the inlet air temperature, and record it as a second temperature difference.

[0065] Step S430: Calculate the temperature of the target component according to the second temperature difference, the surface temperature, the second distance, and a preset third formula.

[0066] Step S440: Control the operating power of the electric heating component according to the temperature of the target component.

[0067] According to the preset third formula, the temperature at the target component can be calculated, and then the operating power of the electric heating component can be adjusted to make the temperature at the target component within an appropriate range, and then all components around the electric heating component are within a safe temperature range, ensuring stable operation of the electric heating device.

[0068] By specifically protecting weak components of the system and dynamically controlling power, the safety, reliability and energy efficiency of the air conditioning electric heating system are significantly improved.

[0069] In some embodiments, in step S440, the specific process of controlling the operating power of the electric heating component according to the temperature at the target component includes: judging the relationship between the temperature at the target component and the preset safety temperature of the target component; if the temperature at the target component is lower than the preset safety temperature, maintaining the operating power of the electric heating component unchanged; if the temperature at the target component is greater than or equal to the preset safety temperature, reducing the operating power of the electric heating component until the temperature at the target component is lower than the preset safety temperature.

[0070] The preset safety temperature of the target component is the thermal safety threshold. If the temperature exceeds the preset safety temperature, the component will melt and fail, potentially causing a short circuit or fire. By comparing the temperature with the preset safety temperature in real time, the protection mechanism can be triggered promptly. When the target component temperature is lower than the preset safety temperature, the system's thermal safety is controllable at the current power level, and no adjustments are required to maintain heating efficiency, avoiding unnecessary power adjustments and reducing system fluctuations. If the temperature reaches or exceeds the preset safety temperature, the power must be immediately reduced to prevent component melting. This power reduction reduces the heat generated by the electric heating element, and the target component temperature drops accordingly, directly eliminating thermal safety risks and ensuring system reliability.

[0071] By comparing the target component temperature with its melting point in real time, the electric heating power is dynamically reduced when the temperature exceeds the melting point, forming a simple and reliable thermal protection closed loop. This ensures that the system's key components are always within a safe temperature range, avoiding the risk of melting failure, while maintaining efficient operation within the safety threshold.

[0072] Figure 6 FIG. 1 is a flow chart of another embodiment of the air conditioner control method of the present invention. Figure 6 As shown, the method includes:

[0073] Step 1: Filter out the components with the lowest melting point near the electric heating component, and obtain the safety temperature Ts of the component, the distance between the component and the electric heating component, the air inlet temperature of the electric heating device, and the target air outlet temperature.

[0074] Step 2: Calculate the temperature T1 at the component based on the distance between the component and the electric heating element, the inlet air temperature, and the target outlet air temperature to determine whether T1 < Ts. If so, proceed to step 3. If T1 ≥ Ts, reduce the electric heating power and issue a warning: The currently set target temperature is too high, there is a risk of material damage, and the heating power has been reduced.

[0075] Step 3: Obtain the thermal protection component's protective temperature value, calculate the temperature T2 at a point -1 cm from the current position of the thermal protection component, and determine whether T2 ≥ the protective temperature value. If T2 ≥ the protective temperature value, calculate the position corresponding to the protective temperature value and move the thermal protection component to the position corresponding to the protective temperature value +1 cm. If T2 < the protective temperature value, do not move the thermal protection component.

[0076] By automatically adjusting the distance between the overheat protection component and the electric heating component according to the wind speed and ambient temperature of the unit, the normal operation of the unit is guaranteed and the abnormal burning of the fuse and temperature limiter is prevented.

[0077] Using the technical solution of this embodiment, the overheat protection component in the electric heating device can move relative to the electric heating component; the surface temperature of the electric heating component is determined based on the inlet air temperature and the target outlet air temperature of the electric heating device; and whether a temperature anomaly exists at the overheat protection component is determined based on the inlet air temperature, the surface temperature, and the distance between the overheat protection component and the electric heating component. If a temperature anomaly is determined at the overheat protection component, the target position of the overheat protection component is determined based on the inlet air temperature and the surface temperature, and the overheat protection component is controlled to move to the target position. Thus, by dynamically calculating the surface temperature of the electric heating component and predicting the thermal risk of the protection component, the position of the protection component is automatically adjusted, avoiding overheating failure or damage to the protection component, extending the equipment life, and ensuring stable operation of the air conditioner.

[0078] According to an embodiment of the present invention, an air conditioner control device corresponding to the air conditioner control method is also provided. The air conditioner includes an electric heating device, such as a tubular electric heater or a PTC electric heater; the electric heating device includes an electric heating element and an overheating protection element, the electric heating element including an electric heating tube; the overheating protection element including a temperature limiter and a fuse; the overheating protection element is movable relative to the electric heating element.

[0079] See also Figure 2 FIG2 is a schematic structural diagram of an embodiment of the device of the present invention. The air conditioner control device may include: an acquisition unit 102 and a control unit 104.

[0080] The acquisition unit 102 is configured to acquire the air inlet temperature of the electric heating device and the target air outlet temperature set by the user; and acquire the distance between the overheat protection component and the electric heating component, which is recorded as a first distance. The specific functions and processing of the acquisition unit 102 are shown in step S110.

[0081] The electric heating device is provided with a laser distance measuring component, which can measure the distance between other components or elements in the electric heating device and the electric heating component.

[0082] The control unit 104 is configured to determine the surface temperature of the electric heating component according to the inlet air temperature and the target outlet air temperature. Specific functions and processing of the control unit 104 are described in step S120.

[0083] The surface temperature of electric heating tubes is a key factor contributing to overheating risk, but it's difficult to measure directly in practice. This solution addresses this temperature measurement challenge by inferring the surface temperature based on the inlet air temperature and the target outlet air temperature.

[0084] In some embodiments, the control unit 104 determines the surface temperature of the electric heating component according to the inlet air temperature and the target outlet air temperature, including:

[0085] The control unit 104 is further configured to calculate the difference between the target air outlet temperature and the air inlet temperature, which is recorded as a first temperature difference. The specific functions and processing of the control unit 104 are shown in step S210.

[0086] The control unit 104 is further configured to calculate the operating power of the electric heating component according to the first temperature difference and a preset first formula. The specific functions and processing of the control unit 104 are shown in step S220.

[0087] The first preset formula is: P = (L × △ T1) ÷ 3000 ÷ θ. P is the operating power of the electric heating component, in KW; L is the air supply volume, in m 3 / h; ΔT1 is the first temperature difference, reflecting the required temperature rise of the electric heating device: ΔT1 = target outlet temperature - inlet temperature; θ is the electric heating efficiency, which can be set to 85%. The calculated operating power is the power required to achieve the target outlet temperature. Once this operating power is calculated, the electric heating device is controlled to operate at this power. Dynamic power calculation based on actual temperature rise requirements avoids energy waste or insufficient heating caused by fixed power mode.

[0088] The control unit 104 is further configured to calculate the surface temperature of the electric heating component according to the operating power, the inlet air temperature, and a preset second formula. The specific functions and processing of the control unit 104 are shown in step S230.

[0089] The second preset formula is: T s =T in +P / (h*A). T s is the surface temperature of the electric heating component, T in is the inlet air temperature, A is the effective heat dissipation area of the electric heating element, and P is the operating power of the electric heating element. h is the convective heat transfer coefficient, which is related to factors such as air flow rate and heating tube diameter. That is, the larger P is, the more heat is generated per unit time and the higher the surface temperature is. The smaller h is (e.g., when wind speed decreases), the lower the heat dissipation efficiency is and the higher the surface temperature is. The larger A is, the larger the heat dissipation area is and the lower the surface temperature is.

[0090] By calculating the difference between the inlet air temperature and the target outlet air temperature, and combining it with a preset formula to dynamically determine the operating power and surface temperature of the electric heating component, a precise match between the electric heating power and the actual temperature rise requirement is achieved, the surface temperature prediction accuracy is improved, and the system's adaptability to different ambient temperatures and air volume fluctuations is enhanced.

[0091] The control unit 104 is further configured to determine whether a temperature abnormality occurs at the overheat protection component based on the inlet air temperature, the surface temperature, and the first distance. Specific functions and processing of the control unit 104 are described in step S130.

[0092] When the wind speed of the system decreases, the heat dissipation efficiency of the electric heating component and the air convection decreases, the air flow slows down, and the heat cannot be evenly diffused, resulting in heat accumulation in local areas (such as the middle of the electric heating tube). The overheating protection component is usually installed close to the electric heating component. When the wind speed decreases, the temperature at its location rises rapidly due to the weakening of convection, far exceeding the design tolerance range. Therefore, it is necessary to combine parameters such as the inlet air temperature and the surface temperature of the electric heating component to determine whether there is a temperature abnormality at the current overheating protection component. If the temperature is abnormal, move the electric heating component to place the overheating protection component at a position with a temperature suitable for its operation to ensure the normal operation of the overheating protection component.

[0093] In some embodiments, the control unit 104 determines whether a temperature abnormality occurs at the overheat protection component based on the inlet air temperature, the surface temperature, and the first distance, including:

[0094] The control unit 104 is further configured to calculate the difference between the surface temperature and the inlet air temperature, which is recorded as a second temperature difference. The specific functions and processing of the control unit 104 are shown in step S310.

[0095] The control unit 104 is further configured to calculate the temperature at the overheat protection component according to the second temperature difference, the surface temperature, the first distance, and a preset third formula. The specific functions and processing of the control unit 104 are shown in step S320.

[0096] The third formula is preset as: T(x)=T s -ΔT2·(1-ex / L), x is the distance between the overheat protection component and the electric heating component, T(x) is the temperature at the overheat protection component, T s is the surface temperature of the electric heating component; ΔT2 is the second temperature difference, ΔT2 = surface temperature - inlet air temperature; L is the temperature attenuation length, which is related to the wind speed and convection heat transfer coefficient.

[0097] By non-contactly estimating the temperature of the protected components, there is no need to install temperature sensors in high-temperature areas, reducing hardware costs.

[0098] The control unit 104 is further configured to determine the temperature of the overheat protection component; if the temperature of the overheat protection component is less than a preset temperature, it is determined that no temperature anomaly has occurred at the overheat protection component; if the temperature of the overheat protection component is greater than or equal to the preset temperature, it is determined that a temperature anomaly has occurred at the overheat protection component. The specific functions and processing of the control unit 104 are described in step S330.

[0099] The preset temperature is the safe operating temperature limit for the thermal protection component. If the thermal protection component includes multiple components, the lowest safe operating temperature limit is used as the preset temperature. For example, if the temperature limiter in the thermal protection component is set at 65°C and the fuse is 105°C, the preset temperature is 65°C. When the temperature at the thermal protection component is less than the preset temperature, the thermal protection component is functioning normally and no temperature anomaly is considered. When the temperature at the thermal protection component is greater than or equal to the preset temperature, the thermal protection component is likely to malfunction or even be damaged. In this case, a temperature anomaly is considered and the temperature of the thermal protection component needs to be lowered promptly.

[0100] By calculating the difference between the surface temperature of the electric heating component and the inlet air temperature, dynamically calculating the temperature of the overheating protection component in combination with the thermal attenuation model, and comparing it with the preset temperature threshold to determine abnormalities, non-contact and accurate prediction of the protection component temperature is achieved, avoiding the hardware loss of direct temperature measurement in high-temperature areas, and improving the accuracy of risk judgment, significantly enhancing the safety and reliability of the air-conditioning electric heating system.

[0101] The control unit 104 is further configured to, if it is determined that a temperature anomaly exists at the overheat protection component, determine a target position for the overheat protection component based on the inlet air temperature and the surface temperature, and control the overheat protection component to move to the target position. The specific functions and processing of the control unit 104 are described in step S140.

[0102] This solution calculates the surface temperature of the electric heating component and determines whether the temperature at the overheating protection component is abnormal, and then dynamically adjusts the position of the overheating protection component. This achieves active prediction and precise protection against overheating risks of the electric heating device, avoids overheating and burning of the protection component due to factors such as decreased wind speed, improves the system's adaptability to different working conditions, and extends the service life of the electric heating device and protection components. At the same time, it optimizes the spatial layout and thermal management efficiency through dynamic closed-loop control, combining safety, reliability and economy.

[0103] In some embodiments, the control unit 104 determines the target position of the overheating protection component based on the inlet air temperature and the surface temperature, including: calculating the difference between the surface temperature and the inlet air temperature, recorded as a second temperature difference; calculating an initial distance based on the second temperature difference, the surface temperature, a preset temperature, and a preset third formula; adding a preset adjustment amount to the initial distance to obtain a target distance; and determining the position at the target distance from the electric heating component as the target position.

[0104] For the preset third formula T(x)=T s -ΔT2·(1-ex / L), after determining the temperature difference ΔT2, surface temperature T s After determining the preset temperature T(x), the distance x can be inferred. The temperature at the initial distance is the preset temperature. A preset adjustment is then added to the initial distance to provide a safety margin, ensuring the normal and stable operation of the overheat protection component. If the air outlet is suddenly blocked (due to an abnormality such as a damper actuator) or the control system (electric heater, fan) fails, and the temperature at the target location exceeds the maximum temperature tolerance of the overheat protection component, protection is activated.

[0105] By calculating the difference between the surface temperature and the inlet air temperature, combining it with the thermal attenuation model to infer the critical safety distance of the overheating protection component, and increasing the preset adjustment amount to form the target position, dynamic optimization of the overheating protection component position is achieved. While ensuring safety, the spatial layout is optimized, significantly improving the reliability and adaptability of the air-conditioning electric heating system.

[0106] In some embodiments, the control unit 104 is further configured to:

[0107] The control unit 104 is further configured to, before determining whether a temperature anomaly occurs at the overheat protection component, identify the component with the lowest melting point within a preset distance from the electrical heating component as a target component; and obtain the distance between the target component and the electrical heating component as a second distance. The specific functions and processing of the control unit 104 are described in step S410.

[0108] Within a preset distance around the electric heating component, the components with the lowest melting point are selected as the protection targets. For example, within a 10CM range around the electric heating tube, there are plastic brackets (melting point 120°C) and metal fixtures (melting point 1500°C), then the plastic bracket is selected as the target component. The components with the lowest melting point in the system are the weakest link in thermal safety. By identifying these weak points, targeted protection can be carried out to avoid risks such as short circuits and fires caused by local overheating. In some embodiments, the components with the highest thermal sensitivity can be selected as the target components.

[0109] The control unit 104 is further configured to calculate the difference between the surface temperature and the inlet air temperature, which is recorded as a second temperature difference. The specific functions and processing of the control unit 104 are shown in step S420.

[0110] The control unit 104 is further configured to calculate the temperature of the target component according to the second temperature difference, the surface temperature, the second distance, and a preset third formula. Specific functions and processing of the control unit 104 are shown in step S430.

[0111] The control unit 104 is further configured to control the operating power of the electric heating component according to the temperature of the target component. The specific functions and processing of the control unit 104 are shown in step S440.

[0112] According to the preset third formula, the temperature at the target component can be calculated, and then the operating power of the electric heating component can be adjusted to make the temperature at the target component within an appropriate range, and then all components around the electric heating component are within a safe temperature range, ensuring stable operation of the electric heating device.

[0113] By specifically protecting weak components of the system and dynamically controlling power, the safety, reliability and energy efficiency of the air conditioning electric heating system are significantly improved.

[0114] In some embodiments, the control unit 104 controls the operating power of the electric heating component according to the temperature at the target component, including: judging the relationship between the temperature at the target component and the preset safety temperature of the target component; if the temperature at the target component is lower than the preset safety temperature, maintaining the operating power of the electric heating component unchanged; if the temperature at the target component is greater than or equal to the preset safety temperature, reducing the operating power of the electric heating component until the temperature at the target component is lower than the preset safety temperature.

[0115] The preset safety temperature of the target component is the thermal safety threshold. If the temperature exceeds the preset safety temperature, the component will melt and fail, potentially causing a short circuit or fire. By comparing the temperature with the preset safety temperature in real time, the protection mechanism can be triggered promptly. When the target component temperature is lower than the preset safety temperature, the system's thermal safety is controllable at the current power level, and no adjustments are required to maintain heating efficiency, avoiding unnecessary power adjustments and reducing system fluctuations. If the temperature reaches or exceeds the preset safety temperature, the power must be immediately reduced to prevent component melting. This power reduction reduces the heat generated by the electric heating element, and the target component temperature drops accordingly, directly eliminating thermal safety risks and ensuring system reliability.

[0116] By comparing the target component temperature with its melting point in real time, the electric heating power is dynamically reduced when the temperature exceeds the melting point, forming a simple and reliable thermal protection closed loop. This ensures that the system's key components are always within a safe temperature range, avoiding the risk of melting failure, while maintaining efficient operation within the safety threshold.

[0117] Figure 6 FIG. 1 is a flow chart of another embodiment of the air conditioner control method of the present invention. Figure 6 As shown, the method includes:

[0118] Step 1: Filter out the components with the lowest melting point near the electric heating component, and obtain the safety temperature Ts of the component, the distance between the component and the electric heating component, the air inlet temperature of the electric heating device, and the target air outlet temperature.

[0119] Step 2: Calculate the temperature T1 at the component based on the distance between the component and the electric heating element, the inlet air temperature, and the target outlet air temperature to determine whether T1 < Ts. If so, proceed to step 3. If T1 ≥ Ts, reduce the electric heating power and issue a warning: The currently set target temperature is too high, there is a risk of material damage, and the heating power has been reduced.

[0120] Step 3: Obtain the thermal protection component's protective temperature value, calculate the temperature T2 at a point -1 cm from the current position of the thermal protection component, and determine whether T2 ≥ the protective temperature value. If T2 ≥ the protective temperature value, calculate the position corresponding to the protective temperature value and move the thermal protection component to the position corresponding to the protective temperature value +1 cm. If T2 < the protective temperature value, do not move the thermal protection component.

[0121] By automatically adjusting the distance between the overheat protection component and the electric heating component according to the wind speed and ambient temperature of the unit, the normal operation of the unit is guaranteed and the abnormal burning of the fuse and temperature limiter is prevented.

[0122] Since the processing and functions implemented by the device of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0123] Using the technical solution of the present invention, the overheat protection component in the electric heating device can move relative to the electric heating component; the surface temperature of the electric heating component is determined based on the inlet air temperature and the target outlet air temperature of the electric heating device; whether a temperature anomaly exists at the overheat protection component is determined based on the inlet air temperature, the surface temperature, and the distance between the overheat protection component and the electric heating component; if a temperature anomaly exists at the overheat protection component, the target position of the overheat protection component is determined based on the inlet air temperature and the surface temperature, and the overheat protection component is controlled to move to the target position. Thus, by dynamically calculating the surface temperature of the electric heating device and predicting the thermal risk of the protection component, the position of the protection component is automatically adjusted, avoiding overheating failure or damage of the protection component, extending the equipment life, and ensuring stable operation of the air conditioner.

[0124] According to an embodiment of the present invention, an air conditioner corresponding to the air conditioner control device is also provided. The air conditioner may include: the air conditioner control device described above.

[0125] Since the processing and functions implemented by the air conditioner of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned devices, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0126] Using the technical solution of the present invention, the overheat protection component in the electric heating device can move relative to the electric heating component; the surface temperature of the electric heating component is determined based on the inlet air temperature and the target outlet air temperature of the electric heating device; whether a temperature anomaly exists at the overheat protection component is determined based on the inlet air temperature, the surface temperature, and the distance between the overheat protection component and the electric heating component; if a temperature anomaly exists at the overheat protection component, the target position of the overheat protection component is determined based on the inlet air temperature and the surface temperature, and the overheat protection component is controlled to move to the target position. Thus, by dynamically calculating the surface temperature of the electric heating device and predicting the thermal risk of the protection component, the position of the protection component is automatically adjusted, avoiding overheating failure or damage of the protection component, extending the equipment life, and ensuring stable operation of the air conditioner.

[0127] According to an embodiment of the present invention, a storage medium corresponding to the air conditioner control method is also provided, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above-mentioned air conditioner control method.

[0128] Since the processing and functions implemented by the storage medium of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0129] Using the technical solution of the present invention, the overheat protection component in the electric heating device can move relative to the electric heating component; the surface temperature of the electric heating component is determined based on the inlet air temperature and the target outlet air temperature of the electric heating device; whether a temperature anomaly exists at the overheat protection component is determined based on the inlet air temperature, the surface temperature, and the distance between the overheat protection component and the electric heating component; if a temperature anomaly exists at the overheat protection component, the target position of the overheat protection component is determined based on the inlet air temperature and the surface temperature, and the overheat protection component is controlled to move to the target position. Thus, by dynamically calculating the surface temperature of the electric heating device and predicting the thermal risk of the protection component, the position of the protection component is automatically adjusted, avoiding overheating failure or damage of the protection component, extending the equipment life, and ensuring stable operation of the air conditioner.

[0130] According to an embodiment of the present invention, a computer program product corresponding to the air conditioner control method is also provided. The computer program product includes a computer program. When the computer program product is processed and executed, the steps of the air conditioner control method are implemented.

[0131] Since the processing and functions implemented by the computer program product of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0132] Using the technical solution of the present invention, the overheat protection component in the electric heating device can move relative to the electric heating component; the surface temperature of the electric heating component is determined based on the inlet air temperature and the target outlet air temperature of the electric heating device; whether a temperature anomaly exists at the overheat protection component is determined based on the inlet air temperature, the surface temperature, and the distance between the overheat protection component and the electric heating component; if a temperature anomaly exists at the overheat protection component, the target position of the overheat protection component is determined based on the inlet air temperature and the surface temperature, and the overheat protection component is controlled to move to the target position. Thus, by dynamically calculating the surface temperature of the electric heating device and predicting the thermal risk of the protection component, the position of the protection component is automatically adjusted, avoiding overheating failure or damage of the protection component, extending the equipment life, and ensuring stable operation of the air conditioner.

[0133] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0134] The foregoing description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner includes an electric heating device; The electric heating device includes an electric heating component and an overheating protection component; The overheat protection component is movable relative to the electric heating component; The method comprises: Obtaining the air inlet temperature and target air outlet temperature of the electric heating device; obtaining the distance between the overheat protection component and the electric heating component, recorded as a first distance; determining the surface temperature of the electric heating component according to the inlet air temperature and the target outlet air temperature; determining whether a temperature abnormality occurs at the overheat protection component according to the inlet air temperature, the surface temperature, and the first distance; If it is determined that a temperature abnormality occurs at the overheat protection component, a target position of the overheat protection component is determined according to the inlet air temperature and the surface temperature, and the overheat protection component is controlled to move to the target position.

2. The air conditioner control method according to claim 1, characterized in that: Determining the surface temperature of the electric heating component according to the inlet air temperature and the target outlet air temperature includes: Calculating the difference between the target air outlet temperature and the air inlet temperature, and recording it as a first temperature difference; Calculating the operating power of the electric heating component according to the first temperature difference and a preset first formula; The surface temperature of the electric heating component is calculated according to the operating power, the inlet air temperature, and a preset second formula.

3. The air conditioner control method according to claim 1, characterized in that: Determining whether a temperature abnormality occurs at the overheat protection component according to the inlet air temperature, the surface temperature, and the first distance includes: Calculating the difference between the surface temperature and the inlet air temperature, and recording it as a second temperature difference; Calculating the temperature at the overheat protection component according to the second temperature difference, the surface temperature, the first distance, and a preset third formula; Determining the temperature of the overheat protection component; If the temperature of the overheat protection component is lower than the preset temperature, it is determined that no temperature abnormality occurs at the overheat protection component; If the temperature at the overheat protection component is greater than or equal to a preset temperature, it is determined that a temperature abnormality occurs at the overheat protection component.

4. The air conditioner control method according to claim 1 or 3, characterized in that: Determining a target position of the overheat protection component according to the inlet air temperature and the surface temperature includes: Calculating the difference between the surface temperature and the inlet air temperature, and recording it as a second temperature difference; Calculating an initial distance according to the second temperature difference, the surface temperature, a preset temperature, and a preset third formula; Adding a preset adjustment amount to the initial distance to obtain a target distance; A position at a target distance from the electric heating component is determined as the target position.

5. The air conditioner control method according to any one of claims 1 to 3, characterized in that: Also includes: Before determining whether a temperature abnormality occurs at the overheat protection component, within a preset distance from the electric heating component, the component with the lowest melting point is recorded as the target component; Obtaining the distance between the target component and the electric heating component, and recording it as a second distance; Calculating the difference between the surface temperature and the inlet air temperature, and recording it as a second temperature difference; Calculating the temperature at the target component according to the second temperature difference, the surface temperature, the second distance, and a preset third formula; The operating power of the electric heating component is controlled according to the temperature of the target component.

6. The air conditioner control method according to claim 5, characterized in that: Controlling the operating power of the electric heating component according to the temperature at the target component includes: Determining a relationship between a temperature at the target component and a preset safety temperature of the target component; If the temperature of the target component is lower than the preset safety temperature, the operating power of the electric heating component is kept unchanged; If the temperature at the target component is greater than or equal to the preset safety temperature, the operating power of the electric heating component is reduced until the temperature at the target component is lower than the preset safety temperature.

7. A control device for an air conditioner, characterized in that: The air conditioner includes an electric heating device; The electric heating device includes an electric heating component and an overheating protection component; The overheat protection component is movable relative to the electric heating component; The control device comprises: an acquisition unit configured to acquire an air inlet temperature and a target air outlet temperature of the electric heating device; and acquire a distance between the overheat protection component and the electric heating component, recorded as a first distance; a control unit configured to determine a surface temperature of the electric heating component according to the inlet air temperature and the target outlet air temperature; The control unit is further configured to determine whether a temperature abnormality occurs at the overheat protection component based on the inlet air temperature, the surface temperature, and the first distance; The control unit is further configured to determine a target position of the overheating protection component according to the inlet air temperature and the surface temperature if it is determined that a temperature abnormality occurs at the overheating protection component, and control the overheating protection component to move to the target position.

8. An air conditioner, characterized in that: include: The air conditioner control device according to claim 7.

9. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the air conditioner control method according to any one of claims 1 to 6.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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