An over-temperature protection method, a foot pump and a driving device

Abstract

The embodiment of the application discloses a kind of over-temperature protection method, inflator pump and driving equipment, method includes: with the first set sampling frequency, the cumulative over-temperature value of multiple set loads is obtained, wherein, cumulative over-temperature value is based on the comparison relationship of set load temperature and the first set temperature threshold, the sum of the weighted value obtained by accumulation;In response to the cumulative over-temperature value of any set load exceeds set over-temperature threshold, the over-temperature flag of corresponding set load is 1, and the cooling monitoring value corresponding to corresponding set load is 0;In response to the over-temperature flag of any set load is 1, control target motor stops working, and enters over-temperature protection mode.The embodiment of the application solves the technical problem that the temperature protection algorithm precision of air suspension inflator pump in the prior art is relatively low, the system reliability is relatively low, and then over-temperature misfire threat is caused, improves the temperature protection precision and reliability of air suspension inflator pump, and reduces the technical effect of over-temperature misfire threat.

Description

Technical Field

[0001] This invention relates to the field of temperature control technology, and more particularly to an over-temperature protection method, an air pump, and a driving device. Background Technology

[0002] Currently, the temperature protection algorithm of the air suspension inflator has low accuracy and cannot accurately and safely protect the air suspension inflator, resulting in low system reliability. In some cases, excessive temperature may even cause the vehicle to catch fire, resulting in personal injury and property damage. Summary of the Invention

[0003] This invention provides an over-temperature protection method, an air pump, and a driving device, which solves the technical problem that the temperature protection algorithm of the air suspension air pump in the prior art has low accuracy, resulting in low system reliability and thus posing a threat of over-temperature fire.

[0004] This invention provides an over-temperature protection method, the method comprising: The cumulative over-temperature values ​​of multiple set loads are obtained at a first set sampling frequency, wherein the cumulative over-temperature values ​​are the sum of weighted values ​​obtained by comparing the load temperature of the set load with the first set temperature threshold. In response to the cumulative over-temperature value of any of the set loads exceeding the set over-temperature threshold, the over-temperature flag of the corresponding set load is set to 1, and the cooling monitoring value corresponding to the set load is set to 0. In response to the over-temperature flag of any of the set loads being 1, the target motor is controlled to stop working and enter the over-temperature protection mode.

[0005] Furthermore, after entering the over-temperature protection mode, the method further includes: The cooling monitoring values ​​of multiple set loads are acquired at a second set sampling frequency, wherein the cooling monitoring values ​​are the sum of weighted values ​​obtained by accumulating the load temperature of the set load and the second set temperature threshold. In response to any of the set loads having a cooling monitoring value exceeding a set cooling threshold, the over-temperature flag of the corresponding set load is set to 0, and the cumulative over-temperature value corresponding to the set load is set to 0. In response to all the over-temperature flags of the set loads being 0, the over-temperature protection mode is exited, and the target motor is controlled to start working.

[0006] Furthermore, the method for calculating the cumulative overtemperature value includes: The load temperature of the set load is obtained at first set intervals; If the load temperature is greater than or equal to the first set temperature threshold, the cumulative over-temperature value is added to a first set weighted value, wherein the first set weighted value is a positive number; If the load temperature is less than the first set temperature threshold, the cumulative over-temperature value is added to a second set weighted value, wherein the second set weighted value is a negative number.

[0007] Furthermore, the method for calculating the cooling monitoring value includes: The load temperature of the set load is obtained every second set time interval; If the load temperature is less than the second set temperature threshold, the cooling monitoring value is accumulated by a third set weighted value, wherein the third set weighted value is a positive number; If the load temperature is greater than or equal to the second set temperature threshold, the cooling monitoring value is accumulated by a fourth set weighted value, wherein the fourth set weighted value is a negative number.

[0008] Furthermore, the method also includes: The first cumulative working time of the target motor within the third set time period is obtained at the first set sampling frequency; In response to the fact that the proportion of the first cumulative working time to the third set time is greater than the first set ratio threshold, the over-temperature flag corresponding to the target motor is set to 1; In response to the over-temperature flag of the target motor being 1, the target motor is controlled to stop working and enter the over-temperature protection mode.

[0009] Furthermore, the method also includes: The second cumulative working time of the target motor within the fourth set time period is obtained using the second set sampling frequency; In response to the fact that the proportion of the second cumulative working time to the fourth set time is less than the second set ratio threshold, the over-temperature flag corresponding to the target motor is set to 0; In response to the over-temperature flag of the target motor being 0, and the over-temperature flags of all the set loads being 0, the over-temperature protection mode is exited, and the target motor is controlled to start working.

[0010] Furthermore, the method also includes: In response to the cumulative overtemperature value of any of the set loads being less than 0, the cumulative overtemperature value corresponding to the set load is assigned to 0.

[0011] Furthermore, the method also includes: In response to any of the set loads having a cooling monitoring value less than 0, the corresponding cooling monitoring value for the set load is assigned a value of 0.

[0012] This invention also provides an air pump that performs the over-temperature protection method described in any of the above embodiments; The load temperature of the set load includes at least the overall temperature of the air pump and the air circuit temperature of the air pump; The combined temperature of the air pump is the maximum value among the circuit board temperature, motor temperature, and ambient temperature of the electronic control unit.

[0013] This invention also provides a driving device, which includes the air pump described in any of the above embodiments.

[0014] This invention discloses an over-temperature protection method, an air pump, and a driving device. The method includes: acquiring cumulative over-temperature values ​​of multiple set loads at a first set sampling frequency, wherein the cumulative over-temperature values ​​are the weighted sum of values ​​obtained by comparing the load temperature of the set load with a first set temperature threshold; in response to any set load's cumulative over-temperature value exceeding the set over-temperature threshold, setting the over-temperature flag of the corresponding set load to 1 and setting the corresponding cooling monitoring value of the set load to 0; in response to any set load's over-temperature flag being 1, controlling the target motor to stop working and entering an over-temperature protection mode. This invention solves the technical problem of low accuracy in the temperature protection algorithm of air suspension air pumps in the prior art, which leads to low system reliability and the potential for over-temperature fire hazards, by real-time monitoring of the temperature value of the set load and performing weighted counting based on the monitoring results, and then controlling the start and stop of the motor based on the counting results. This achieves the technical effect of improving the temperature protection accuracy and reliability of air suspension air pumps and reducing the threat of over-temperature fire. Attached Figure Description

[0015] Figure 1 This is a flowchart of an over-temperature protection method provided in an embodiment of the present invention; Figure 2 This is a flowchart of another over-temperature protection method provided in an embodiment of the present invention. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0017] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this invention are used to distinguish different objects, not to limit a specific order. The various embodiments of this invention described below can be performed individually or in combination with each other; the embodiments of this invention do not impose specific limitations in this regard.

[0018] Figure 1 This is a flowchart of an over-temperature protection method provided in an embodiment of the present invention.

[0019] like Figure 1 As shown, the over-temperature protection method specifically includes the following steps: S101, acquire the cumulative over-temperature values ​​of multiple set loads at a first set sampling frequency, wherein the cumulative over-temperature value is the sum of weighted values ​​obtained by comparing the load temperature of the set load with the first set temperature threshold.

[0020] Specifically, each set load corresponds to a unique cumulative over-temperature value. The cumulative over-temperature value of each set load is acquired and monitored in real time at a first set sampling frequency. The cumulative over-temperature value of each set load is used to perform over-temperature protection on the target equipment where the set load is located. Each set load is assigned a different weight according to its temperature impact on the normal operation of the target equipment, and the cumulative over-temperature value is accumulated based on the pre-set weight value.

[0021] For example, if the target device is a closed-loop air pump, the set load can be the air circuit, control circuit board, drive motor, electronic control unit (ECU), etc. of the entire air pump system. When performing over-temperature protection on the target device, it is necessary to obtain the cumulative over-temperature value of each of the above set loads in real time, and then perform subsequent over-temperature protection.

[0022] It should be noted that if certain loads are located close to each other or have similar temperature trends, such as control circuit boards, drive motors, and electronic control units, the load can be determined as the device with the highest real-time temperature among these devices to reduce computational load and improve over-temperature protection rate.

[0023] S102, in response to the cumulative over-temperature value of any set load exceeding the set over-temperature threshold, the over-temperature flag of the corresponding set load is set to 1, and the cooling monitoring value corresponding to the set load is set to 0.

[0024] S103, in response to the over-temperature flag of any set load being 1, controls the target motor to stop working and enters the over-temperature protection mode.

[0025] Specifically, if the cumulative over-temperature value of any one of the multiple set loads exceeds the set over-temperature threshold, the over-temperature flag of that set load is set to 1. If the over-temperature flag of any set load is 1, it indicates that some areas of the target equipment are over-temperature. At this time, the target motor is controlled to stop working so that the target equipment can be shut down for heat dissipation to avoid the threat caused by over-temperature. At the same time, the cooling monitoring value of the set load is set to 0, and the cooling monitoring of the set load is started.

[0026] For example, suppose the target device has set load A, set load B, and set load C, with corresponding cumulative over-temperature values ​​of CNT1, CNT2, and CNT3, respectively; corresponding over-temperature flags of Flag1, Flag2, and Flag3, respectively; and corresponding cooling monitoring values ​​of CNT4, CNT5, and CNT6, respectively. Then, when the cumulative over-temperature value of any one of the three set loads exceeds the set over-temperature threshold T... 过温阈值 For example, CNT1 > T 过温阈值 If the over-temperature flag Flag1 of load A is set to 1, then Flag1, Flag2, or Flag3 will be set to 1, triggering the over-temperature protection mode to start and controlling the target motor to stop working.

[0027] This invention addresses the technical problem of low accuracy in the temperature protection algorithm of air-suspended air pumps, which leads to low system reliability and the risk of overheating and fire, by real-time monitoring of the temperature value of the set load and weighted counting based on the monitoring results, and then controlling the start and stop of the motor based on the counting results. It achieves the technical effect of improving the temperature protection accuracy and reliability of air-suspended air pumps and reducing the risk of overheating and fire.

[0028] Optionally, the method for calculating the cumulative overtemperature value includes: The load temperature of the set load is obtained every first set time interval; if the load temperature is greater than or equal to the first set temperature threshold, the accumulated over-temperature value is added to the first set weighted value, where the first set weighted value is a positive number; if the load temperature is less than the first set temperature threshold, the accumulated over-temperature value is added to the second set weighted value, where the second set weighted value is a negative number.

[0029] For example, taking a set load A as an example, the load temperature TA of the set load A is obtained at each first set time interval t1; if the load temperature TA ≥ the first set temperature threshold T 阈值1 Then, the cumulative overtemperature value CNT1 corresponding to load A is increased by a first set weighted value weight1, where weight1 > 0; if the load temperature TA < the first set temperature threshold T 阈值1 Then, the cumulative overtemperature value CNT1 is added to the second set weighted value weight2, where weight2 < 0; finally, the cumulative overtemperature value CNT1 corresponding to the set load A is obtained by summing.

[0030] Optionally, the over-temperature protection method further includes: The first cumulative working time of the target motor within a third set time period is obtained at a first set sampling frequency; in response to the first cumulative working time accounting for more than the third set time period being greater than the first set ratio threshold, the over-temperature flag of the target motor is set to 1; in response to the over-temperature flag of the target motor being 1, the target motor is controlled to stop working and enter the over-temperature protection mode.

[0031] Specifically, in addition to setting temperature monitoring for the load, an over-temperature protection mode can be activated based on the operating status of the target motor in the target device. For example, the first cumulative operating time t of the target motor within a third set time period t3 is obtained at a first set sampling frequency. 累计1 If the first cumulative working time accounts for t% of the third set working time... 累计1 / t3 > First set proportional threshold X1 indicates that the target motor has been working for a long time and is prone to overheating. At this time, the overheating flag Flag4 corresponding to the target motor is set to 1. When the overheating flag Flag4 of the target motor is 1, the overheating protection mode is triggered and the target motor is controlled to stop working.

[0032] It should be noted that in the actual process of over-temperature protection of the target equipment, the temperature monitoring of each set load and the monitoring of the target motor's operating time are carried out simultaneously. Therefore, in the actual over-temperature protection process, setting any one of Flag1, Flag2, Flag3, or Flag4 to 1 will trigger the over-temperature protection mode to be activated.

[0033] Optionally, the over-temperature protection method further includes: In response to any set load having a cumulative overtemperature value less than 0, the corresponding set load's cumulative overtemperature value is set to 0.

[0034] Specifically, if the cumulative over-temperature value of any set load is less than 0 during the monitoring of the temperature of each set load of the target device, then the cumulative over-temperature value of the set load is directly set to 0. For example, if the cumulative over-temperature value CNT1 of set load A is <0, then CNT1 is set to 0, and then the temperature monitoring of each set load continues.

[0035] Based on the above technical solutions, Figure 2 This is a flowchart of another over-temperature protection method provided in an embodiment of the present invention, such as... Figure 2 As shown, after S103 enters the over-temperature protection mode, the over-temperature protection method further includes: S201, acquire multiple cooling monitoring values ​​of a set load at a second set sampling frequency, wherein the cooling monitoring value is a weighted sum of values ​​obtained by comparing the load temperature of the set load with the second set temperature threshold.

[0036] Specifically, the second set temperature threshold is less than or equal to the first set temperature threshold. Each set load corresponds to a unique cooling monitoring value. The cooling monitoring values ​​of each set load are acquired and monitored in real time at a second set sampling frequency. The cooling monitoring values ​​of each set load are used to monitor the recovery of the target equipment after over-temperature protection. Each set load is assigned a different weight based on its degree of cooling and its impact on the normal operation of the target equipment. The cooling monitoring values ​​are accumulated based on the pre-set weight values.

[0037] It should be noted that if certain loads are located close to each other or have similar temperature trends, such as control circuit boards, drive motors, and electronic control units, the load can be determined as the device with the highest real-time temperature among these devices to reduce computational load and improve over-temperature protection rate.

[0038] S202, in response to the cooling monitoring value of any set load exceeding the set cooling threshold, the over-temperature flag of the corresponding set load is set to 0, and the cumulative over-temperature value corresponding to the corresponding set load is set to 0.

[0039] S203, in response to all set load over-temperature flags being 0, exits over-temperature protection mode and controls the target motor to start working.

[0040] Specifically, if the temperature monitoring value of any of the multiple set loads exceeds the set over-temperature threshold, the over-temperature flag of that set load is set to 0. If the over-temperature flags of all set loads are set to 0, it indicates that all loads in the target device have returned to normal temperature, and the over-temperature protection mode is triggered to exit. At the same time, the cumulative over-temperature value of that set load is set to 0, and the monitoring of the temperature of each set load in the target device is restarted.

[0041] For example, suppose the target device has set load A, set load B, and set load C, with corresponding cumulative over-temperature values ​​of CNT1, CNT2, and CNT3, respectively; corresponding over-temperature flags of Flag1, Flag2, and Flag3, respectively; and corresponding cooling monitoring values ​​of CNT4, CNT5, and CNT6, respectively. Then, when the cooling monitoring value of all three set loads exceeds the set cooling threshold T... 降温阈值 For example, set the cooling monitoring value of load A to CNT4 > T. 降温阈值 Set the cooling monitoring value of load B to CNT5 > T. 降温阈值 Set the cooling monitoring value of load C to CNT6 > T. 降温阈值If the over-temperature flags Flag1, Flag2, and Flag3 for load A, load B, and load C are all set to 0, the over-temperature protection mode will be triggered and the target motor will restart.

[0042] Optionally, the calculation method for the cooling monitoring value includes: The load temperature of the set load is acquired every second set time interval; if the load temperature is less than the second set temperature threshold, the cooling monitoring value is accumulated by a third set weighted value, where the third set weighted value is a positive number; if the load temperature is greater than or equal to the second set temperature threshold, the cooling monitoring value is accumulated by a fourth set weighted value, where the fourth set weighted value is a negative number.

[0043] For example, taking a set load A as an example, the load temperature TA of the set load A is obtained at every second set time interval t2; if the load temperature TA < the second set temperature threshold T 阈值2 Then, the cooling monitoring value CNT4 corresponding to load A is increased by a third set weighting value weight3, where weight3 > 0; if the load temperature TA ≥ the second set temperature threshold T 阈值2 Then, the cooling monitoring value CNT4 is accumulated by the fourth set weighted value weight4, where weight4 < 0; finally, the cooling monitoring value CNT4 corresponding to the set load A is obtained by accumulating the values.

[0044] Optionally, the over-temperature protection method further includes: The second cumulative working time of the target motor within the fourth set time period is obtained at the second set sampling frequency; in response to the fact that the proportion of the second cumulative working time to the fourth set time period is less than the second set ratio threshold, the over-temperature flag of the target motor is set to 0; in response to the over-temperature flag of the target motor being 0 and the over-temperature flags of all set loads being 0, the over-temperature protection mode is exited and the target motor is controlled to start working.

[0045] Specifically, in addition to setting the load temperature monitoring, it is also necessary to determine whether the over-temperature protection mode can be exited based on the operating status of the target motor in the target device. For example, the second cumulative operating time t of the target motor within the fourth set time t4 is obtained at a second set sampling frequency. 累计2 If the second cumulative working time accounts for t% of the fourth set working time... 累计2 / t4 < the second set proportional threshold X2 indicates that the target motor has not been working for long within a certain time period and will not overheat. At this time, the overheat flag Flag4 corresponding to the target motor is set to 0. Since the temperature monitoring of each set load and the monitoring of the target motor's working time are carried out simultaneously during the actual overheat protection process of the target equipment, when the overheat flag Flag4 of the target motor and the overheat flags of all set loads are all 0, that is, Flag1 and Flag2 and Flag3 and Flag4 are 0, it indicates that there is no overheating in any area of ​​the target equipment, triggering the exit of the overheat protection mode and controlling the target motor to start working again.

[0046] Optionally, the over-temperature protection method further includes: In response to any set load having a cooling monitoring value less than 0, the corresponding set load's cooling monitoring value is assigned to 0.

[0047] Specifically, if the temperature drop monitoring value of any set load is less than 0 during the monitoring of the temperature of each set load of the target device, then the temperature drop monitoring value of the set load is directly assigned to 0. For example, if the temperature drop monitoring value CNT4 of set load A is <0, then CNT4 is set to 0, and then the temperature monitoring of each set load continues.

[0048] This invention also provides an air pump that performs the over-temperature protection method in any of the above embodiments; the load temperature of the load is set to include at least the air pump's overall temperature and the air pump's air circuit temperature; wherein, the air pump's overall temperature is the maximum value among the air pump's circuit board temperature, motor temperature, and the ambient temperature of the electronic control unit.

[0049] Specifically, since the circuit board temperature, motor temperature, and electronic control unit temperatures are set close together or have similar temperature rise trends among the various set loads, the maximum value of the three set load temperatures can be used as the overall temperature of the air pump for temperature monitoring, thereby reducing the amount of calculation and improving the over-temperature protection rate. This will not be elaborated further here.

[0050] The air pump provided in this embodiment of the invention performs the over-temperature protection method in the above embodiments. Therefore, the air pump provided in this embodiment of the invention also has the beneficial effects described in the above embodiments, which will not be repeated here.

[0051] This invention also provides a driving device, which includes the air pump described in any of the above embodiments.

[0052] The driving device provided in this embodiment of the invention includes the air pump in the above embodiment. Therefore, the driving device provided in this embodiment of the invention also has the beneficial effects described in the above embodiment, which will not be repeated here.

[0053] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0054] Finally, it should be noted that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An over-temperature protection method, characterized in that, The method includes: The cumulative over-temperature values ​​of multiple set loads are obtained at a first set sampling frequency, wherein the cumulative over-temperature values ​​are the sum of weighted values ​​obtained by accumulating the load temperatures of the set loads and the first set temperature threshold. In response to the cumulative over-temperature value of any of the set loads exceeding the set over-temperature threshold, the over-temperature flag of the corresponding set load is set to 1, and the cooling monitoring value corresponding to the set load is set to 0. In response to the over-temperature flag of any of the set loads being 1, the target motor is controlled to stop working and enter the over-temperature protection mode.

2. The over-temperature protection method according to claim 1, characterized in that, After entering the over-temperature protection mode, the method further includes: The cooling monitoring values ​​of multiple set loads are obtained at a second set sampling frequency, wherein the cooling monitoring values ​​are the sum of weighted values ​​obtained by accumulating the load temperature of the set load and the second set temperature threshold. In response to any of the set loads having a cooling monitoring value exceeding a set cooling threshold, the over-temperature flag of the corresponding set load is set to 0, and the cumulative over-temperature value corresponding to the set load is set to 0. In response to all the over-temperature flags of the set loads being 0, the over-temperature protection mode is exited, and the target motor is controlled to start working.

3. The over-temperature protection method according to claim 1, characterized in that, The method for calculating the cumulative overtemperature value includes: The load temperature of the set load is obtained at first set intervals; If the load temperature is greater than or equal to the first set temperature threshold, the cumulative over-temperature value is added to a first set weighted value, wherein the first set weighted value is a positive number; If the load temperature is less than the first set temperature threshold, the cumulative over-temperature value is added to a second set weighted value, wherein the second set weighted value is a negative number.

4. The over-temperature protection method according to claim 2, characterized in that, The calculation method for the cooling monitoring value includes: The load temperature of the set load is obtained every second set time interval; If the load temperature is less than the second set temperature threshold, the cooling monitoring value is accumulated by a third set weighted value, wherein the third set weighted value is a positive number; If the load temperature is greater than or equal to the second set temperature threshold, the cooling monitoring value is accumulated by a fourth set weighted value, wherein the fourth set weighted value is a negative number.

5. The over-temperature protection method according to claim 1, characterized in that, The method further includes: The first cumulative working time of the target motor within the third set time period is obtained at the first set sampling frequency; In response to the fact that the proportion of the first cumulative working time to the third set time is greater than the first set ratio threshold, the over-temperature flag corresponding to the target motor is set to 1; In response to the over-temperature flag of the target motor being 1, the target motor is controlled to stop working and enter the over-temperature protection mode.

6. The over-temperature protection method according to claim 2, characterized in that, The method further includes: The second cumulative working time of the target motor within the fourth set time period is obtained using the second set sampling frequency; In response to the fact that the proportion of the second cumulative working time to the fourth set time is less than the second set ratio threshold, the over-temperature flag corresponding to the target motor is set to 0; In response to the over-temperature flag of the target motor being 0, and the over-temperature flags of all the set loads being 0, the over-temperature protection mode is exited, and the target motor is controlled to start working.

7. The over-temperature protection method according to claim 1, characterized in that, The method further includes: In response to the cumulative overtemperature value of any of the set loads being less than 0, the cumulative overtemperature value corresponding to the set load is assigned to 0.

8. The over-temperature protection method according to claim 2, characterized in that, The method further includes: In response to any of the set loads having a cooling monitoring value less than 0, the corresponding cooling monitoring value for the set load is assigned a value of 0.

9. An air pump, characterized in that, The air pump implements the over-temperature protection method according to any one of claims 1-8; The load temperature of the set load includes at least the overall temperature of the air pump and the air circuit temperature of the air pump; The combined temperature of the air pump is the maximum value among the circuit board temperature, motor temperature, and ambient temperature of the electronic control unit.

10. A driving device, characterized in that, The driving device includes the air pump described in claim 9.

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