Temperature control method and system for heating device in vehicle

Abstract

The invention relates to a temperature control method and system for a heating device in a vehicle, and the heating device comprises a heating element, a temperature sensor and a touch sensor which are all connected with the temperature control system. The method is applied to the temperature control system and comprises the steps that the current temperature, sent by a temperature sensor, of a heating element and a current sensing signal sent by a touch sensor are received; judging whether the current temperature is greater than a first preset threshold value; judging whether the heating device is touched or not according to the current sensing signal; and when the current temperature is greater than a first preset threshold value and the heating device is touched, sending a first control signal to the heating element to control the heating element to cool. According to the temperature control method and system for the heating device in the vehicle, when the current temperature exceeds the first preset threshold value and the heating device is touched, the heating element is controlled to be cooled, so that a passenger is prevented from being scalded due to long-time contact with the heating device.

Description

Technical Field

[0001] The present invention relates to the field of vehicle heating devices, and more particularly to a temperature control method and system for a heating device inside a vehicle. Background Art

[0002] In order to achieve rapid heating in the car in winter, a heating device is usually installed inside the vehicle. Unlike conventional air heating devices, the heating device can generate heat through heating and transfer the heat to the outside (for example, through thermal radiation or conductive heat transfer), so that the temperature inside the car rises rapidly and the comfort of the occupants (including the driver and passengers) is improved.

[0003] However, the existing heating device cannot realize intelligent temperature control. When the temperature of the heating device is too high (for example, exceeding 43° C.), if the occupants touch the surface of the heating device for a long time, burns may occur. Summary of the invention

[0004] The object of the present invention is to provide a temperature control method for a heating device inside a vehicle, so as to prevent passengers from getting burned when they are in contact with the heating device for a long time.

[0005] Based on the above purpose, the present invention provides a temperature control method for a heating device inside a vehicle, wherein the heating device comprises a heating element, a temperature sensor and a touch sensor, wherein the heating element, the temperature sensor and the touch sensor are all connected to a temperature control system, wherein the temperature sensor is used to monitor the current temperature of the heating element, and the touch sensor is used to sense whether the heating device is touched. The temperature control method is applied to the temperature control system, and the temperature control method comprises:

[0006] receiving the current temperature of the heating element sent by the temperature sensor and the current sensing signal sent by the touch sensor;

[0007] Determining whether the current temperature is greater than a first preset threshold;

[0008] determining whether the heating device is touched according to the current sensing signal;

[0009] When the current temperature is greater than a first preset threshold and the heating device is touched, a first control signal is sent to the heating element to control the heating element to cool down.

[0010] Furthermore, the first control signal is a first voltage pulse signal, a duty cycle of the first voltage pulse signal is a first preset ratio, and the first preset ratio is smaller than a duty cycle threshold.

[0011] Furthermore, the temperature control method further comprises:

[0012] When the current temperature drops to the first preset threshold and the heating device is touched, a second control signal is sent to the heating element to dynamically maintain the current temperature at the first preset threshold.

[0013] Further, the second control signal is a second voltage pulse signal with a duty cycle of a second preset ratio, and the second preset ratio is equal to the duty cycle threshold; when a voltage pulse signal with a duty cycle of the duty cycle threshold is provided to the heating element, the temperature of the heating element will remain unchanged dynamically; or,

[0014] The second control signal is an alternating third voltage pulse signal and a fourth voltage pulse signal, the duty cycle of the third voltage pulse signal is a third preset ratio, the duty cycle of the fourth voltage pulse signal is a fourth preset ratio, the third preset ratio is greater than the duty cycle threshold, and the fourth preset ratio is less than the duty cycle threshold; sending the second control signal to the heating element so that the current temperature is dynamically maintained at the first preset threshold, specifically includes:

[0015] When the current temperature is less than the first preset threshold and the difference between the current temperature and the first preset threshold reaches a first preset difference, sending the third voltage pulse signal to the heating element to increase the temperature of the heating element;

[0016] When the current temperature is equal to the first preset threshold, a fourth voltage pulse signal is sent to the heating element to cool the heating element.

[0017] Furthermore, the temperature control method further comprises:

[0018] When the current temperature is greater than the first preset threshold and the heating device is not touched, a third control signal is sent to the heating element to control the heating element to increase its temperature.

[0019] Furthermore, the third control signal is a fifth voltage pulse signal with a duty cycle of a fifth preset ratio, and the fifth preset ratio is greater than a duty cycle threshold.

[0020] Furthermore, the temperature control method further comprises:

[0021] It is determined whether the current temperature reaches a second preset threshold value. If so, a fourth control signal is sent to the heating element to dynamically maintain the current temperature at the second preset threshold value.

[0022] Further, the fourth control signal is a sixth voltage pulse signal with a duty cycle of a sixth preset ratio, and the sixth preset ratio is equal to a duty cycle threshold; or,

[0023] The fourth control signal is an alternating seventh voltage pulse signal and an eighth voltage pulse signal, the duty cycle of the seventh voltage pulse signal is a seventh preset ratio, the duty cycle of the eighth voltage pulse signal is an eighth preset ratio, the seventh preset ratio is less than the duty cycle threshold, and the eighth preset ratio is greater than the duty cycle threshold; sending the fourth control signal to the heating element so that the current temperature is dynamically maintained at the second preset threshold, specifically includes:

[0024] When the current temperature is equal to the second preset threshold, sending the seventh voltage pulse signal to the heating element to cool the heating element;

[0025] When the current temperature is less than the second preset threshold and the difference between the current temperature and the second preset threshold is less than the second preset difference, an eighth voltage pulse signal is sent to the heating element to increase the temperature of the heating element.

[0026] Furthermore, the temperature control method further comprises:

[0027] When the current temperature is not greater than the first preset threshold, a fifth control signal is sent to the heating element to control the heating element to increase its temperature.

[0028] Furthermore, the fifth control signal is a ninth voltage pulse signal having a duty cycle of a ninth preset ratio, and the ninth preset ratio is greater than a duty cycle threshold.

[0029] Furthermore, the temperature control system is also connected to a vehicle electronic control unit, and the temperature control method further comprises:

[0030] Receiving a heating start instruction and a heating stop instruction sent by the vehicle electronic control unit;

[0031] After receiving the start heating instruction, start heating;

[0032] After receiving the heating off instruction, heating is stopped.

[0033] Another aspect of the present invention provides a temperature control system for a heating device inside a vehicle, wherein the heating device comprises a heating element, a temperature sensor and a touch sensor, wherein the heating element, the temperature sensor and the touch sensor are all connected to the temperature control system, wherein the temperature sensor is used to monitor the current temperature of the heating element, and the touch sensor is used to sense whether the heating device is touched, and wherein the temperature control system comprises:

[0034] a first receiving module, configured to receive the current temperature of the heating element sent by the temperature sensor and the current sensing signal sent by the touch sensor;

[0035] A first judgment module, used to judge whether the current temperature is greater than a first preset threshold;

[0036] A second judging module, used for judging whether the heating device is touched according to the current sensing signal;

[0037] The first sending module is used to send a first control signal to the heating element to control the heating element to cool down when the current temperature is greater than a first preset threshold and the heating device is touched.

[0038] Furthermore, the first control signal is a first voltage pulse signal, a duty cycle of the first voltage pulse signal is a first preset ratio, and the first preset ratio is smaller than a duty cycle threshold.

[0039] Furthermore, the temperature control system also includes a second sending module, which is used to send a second control signal to the heating element when the current temperature drops to the first preset threshold and the heating device is touched, so as to dynamically maintain the current temperature at the first preset threshold.

[0040] Further, the second control signal is a second voltage pulse signal with a duty cycle of a second preset ratio, and the second preset ratio is equal to the duty cycle threshold; when a voltage pulse signal with a duty cycle of the duty cycle threshold is provided to the heating element, the temperature of the heating element will remain unchanged dynamically; or,

[0041] The second control signal is an alternating third voltage pulse signal and a fourth voltage pulse signal, the duty cycle of the third voltage pulse signal is a third preset ratio, the duty cycle of the fourth voltage pulse signal is a fourth preset ratio, the third preset ratio is greater than the duty cycle threshold, and the fourth preset ratio is less than the duty cycle threshold; sending the second control signal to the heating element so that the current temperature is dynamically maintained at the first preset threshold, specifically includes:

[0042] When the current temperature is less than the first preset threshold and the difference between the current temperature and the first preset threshold reaches a first preset difference, sending the third voltage pulse signal to the heating element to increase the temperature of the heating element;

[0043] When the current temperature is equal to the first preset threshold, a fourth voltage pulse signal is sent to the heating element to cool the heating element.

[0044] Furthermore, the temperature control system also includes a third sending module, which is used to send a third control signal to the heating element to control the heating element to heat up when the current temperature is greater than the first preset threshold and the heating device is not touched.

[0045] Furthermore, the third control signal is a fifth voltage pulse signal with a duty cycle of a fifth preset ratio, and the fifth preset ratio is greater than a duty cycle threshold.

[0046] Furthermore, the temperature control system also includes a third judgment module, which is used to judge whether the current temperature reaches the second preset threshold value. If so, a fourth control signal is sent to the heating element to dynamically maintain the current temperature at the second preset threshold value.

[0047] Further, the fourth control signal is a sixth voltage pulse signal with a duty cycle of a sixth preset ratio, and the sixth preset ratio is equal to a duty cycle threshold; or,

[0048] The fourth control signal is an alternating seventh voltage pulse signal and an eighth voltage pulse signal, the duty cycle of the seventh voltage pulse signal is a seventh preset ratio, the duty cycle of the eighth voltage pulse signal is an eighth preset ratio, the seventh preset ratio is less than the duty cycle threshold, and the eighth preset ratio is greater than the duty cycle threshold; sending the fourth control signal to the heating element so that the current temperature is dynamically maintained at the second preset threshold, specifically includes:

[0049] When the current temperature is equal to the second preset threshold, sending the seventh voltage pulse signal to the heating element to cool the heating element;

[0050] When the current temperature is less than the second preset threshold and the difference between the current temperature and the second preset threshold is less than the second preset difference, an eighth voltage pulse signal is sent to the heating element to increase the temperature of the heating element.

[0051] Furthermore, the temperature control system also includes a fourth sending module, which is used to send a fifth control signal to the heating element to control the heating element to increase its temperature when the current temperature is not greater than the first preset threshold.

[0052] Furthermore, the fifth control signal is a ninth voltage pulse signal having a duty cycle of a ninth preset ratio, and the ninth preset ratio is greater than a duty cycle threshold.

[0053] Furthermore, the temperature control system is also connected to the vehicle electronic control unit, and the temperature control system also includes a second receiving module, which is used to receive the start heating instruction and the stop heating instruction sent by the vehicle electronic control unit, and turn on the heating after receiving the start heating instruction and stop the heating after receiving the stop heating instruction.

[0054] The temperature control method and system of the heating device inside the vehicle of the present invention controls the heating element to cool down when the current temperature exceeds a first preset threshold value and the heating device is touched, so as to avoid burns to the occupants due to long-term contact with the heating device; when the heating device is not touched, the heating element is heated to a second preset threshold value, which can achieve heating as quickly as possible on the one hand, and avoid the risk of burns to the occupants due to brief contact with the heating device due to its overly high temperature on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 The structure of the heating device inside the vehicle according to the embodiment of the present invention and its connection relationship with the temperature control system and the ECU are shown;

[0056] Figure 2 is a flow chart of a temperature control method of a heating device inside a vehicle according to an embodiment of the present invention;

[0057] Figure 3 is a schematic structural diagram of an interior decoration component according to an exemplary embodiment of the present invention;

[0058] Figure 4 FIG. 4 is a structural block diagram of a temperature control system of a heating device inside a vehicle according to another embodiment of the present invention. DETAILED DESCRIPTION

[0059] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings and described in detail.

[0060] like Figure 1 As shown, the heating device inside the vehicle includes a heating element 100, a temperature sensor 200 and a touch sensor 300. The heating element 100, the temperature sensor 200 and the touch sensor 300 are all connected to the temperature control system 400. The heating element 100 is used to heat and radiate heat outwardly, the temperature sensor 200 is used to monitor the temperature of the heating element 100 and transmit the monitored temperature to the temperature control system 400, the touch sensor 300 is used to sense whether the surface of the heating device is touched by the occupant and transmit the sensing signal to the temperature control system 400, and the temperature control system 400 controls the heating element 100 to heat up or cool down according to the monitored temperature and the sensing signal, so that it can not only realize the fastest heating in the vehicle, but also avoid burns caused by the occupants touching the heating device for a long time.

[0061] like Figure 2 As shown, an embodiment of the present invention provides a temperature control method for a heating device, which is applied to a temperature control system 400. The method includes the following steps:

[0062] S1000 : receiving the current temperature of the heating element 100 sent by the temperature sensor 200 and the current sensing signal sent by the touch sensor 300 .

[0063] The temperature sensor 200 can monitor the current temperature of the heating element 100 and send the current temperature to the temperature control system 400 , and the touch sensor 300 can sense whether the heating device is touched and send the current sensing signal to the temperature control system 400 .

[0064] S2000: Determine whether the current temperature is greater than a first preset threshold.

[0065] The first preset threshold is a critical threshold that will cause burns if the occupant contacts the heating device for a long time, that is, when the temperature of the heating element 100 is greater than the first preset threshold, if the occupant contacts the heating device for a long time, it will cause burns. When the temperature of the heating element 100 is less than or equal to the first preset threshold, if the occupant contacts the heating device for a long time, it will not cause burns. Therefore, when the current temperature is less than or equal to the first preset threshold, the occupant can contact the heating element 100 for a long time without cooling the heating element 100; when the current temperature is greater than the first preset threshold, it may be necessary to control the heating element 100 to cool down to avoid scalding the occupant. The first preset threshold may be less than or equal to 45°C, for example, 43°C.

[0066] S3000: Determine whether the heating device is touched according to the current sensing signal.

[0067] The touch sensor 300 may be a capacitive sensor or a resistive sensor. When the heating device is touched, it generates a capacitance or voltage signal (i.e., an induction signal). After the temperature control system 400 receives the induction signal, it can determine whether the heating device is touched. The structure and working principle of the touch sensor 300 are well known in the art and will not be described in detail here.

[0068] S4000: When the current temperature is greater than a first preset threshold and the heating device is touched, a first control signal is sent to the heating element 100 to control the heating element 100 to cool down.

[0069] When the current temperature is greater than the first preset threshold, if the occupant contacts the heating device for a long time, there is a risk of burns. Therefore, it is necessary to control the heating element 100 to cool down so that the temperature of the heating element 100 drops to less than or equal to the first preset threshold.

[0070] In some embodiments, the first control signal may be a first voltage pulse signal, whose duty cycle is a first preset ratio (e.g., 0 or 10%), and the first voltage pulse signal is used to provide a heating voltage to the heating element 100, and the heating voltage can heat the heating element 100. The duty cycle refers to the proportion of the power-on time relative to the total time in a pulse cycle. For example, when the duty cycle is 0, it means that in a pulse cycle, the voltage provided to the heating element 100 is always 0, and the heating element 100 will stop heating and will gradually cool down, so its temperature will gradually decrease; when the duty cycle is 10%, it means that in a pulse cycle, a voltage greater than 0 will be provided to the heating element 100 for 10% of the time, so that the heating element 100 is heated, and the remaining 90% of the time, no voltage is provided, and the heating element 100 will stop heating. At this time, since the heating time of the heating element 100 is much shorter than the cooling time of the heating element 100, the heating element can also be cooled slowly.

[0071] It can be understood that when the duty cycle is less than the duty cycle threshold, the voltage pulse signal of the duty cycle can cool the heating element 100, and when the duty cycle is greater than the duty cycle threshold, the heating element 100 can be heated up because the heating time is greater than the cooling time and the heat generated by heating is greater than the heat dissipated during cooling; when the duty cycle is equal to the duty cycle threshold, the heat generated and the heat dissipated by the heating element 100 are balanced, so the temperature of the heating element 100 can fluctuate within a small range. The specific value of the duty cycle threshold can be obtained by conducting experiments of inputting voltage pulse signals with different duty cycles to the heating element 100.

[0072] The first preset ratio needs to be smaller than the duty cycle threshold, and in order to cool down the heating element 100 as quickly as possible, the value of the first preset ratio may be less than 10%.

[0073] When the heating device is touched and the heating element 100 is triggered to cool down, if the heating device is still touched after the current temperature drops to the first preset threshold, the temperature control system 400 will control the heating element 100 so that the current temperature is dynamically maintained at the first preset threshold. Dynamically maintained at the first preset threshold means that the current temperature will fluctuate within a small range near the first preset threshold. Specifically, the temperature control system 400 can send a second control signal to the heating element 100, and the second control signal is a second voltage pulse signal with a duty cycle of a second preset ratio, wherein the second preset ratio is equal to the duty cycle threshold, so that the current temperature is dynamically maintained at the first preset threshold. Alternatively, the second control signal may be an alternating third voltage pulse signal and a fourth voltage pulse signal, wherein the duty cycle of the third voltage pulse signal is a third preset ratio, which is greater than a duty cycle threshold value (for example, 100%), and the duty cycle of the fourth voltage pulse signal is a fourth preset ratio, which is less than the duty cycle threshold value (for example, 0). When the current temperature is less than the first preset threshold value and the difference between the current temperature and the first preset threshold value reaches a first preset difference value (for example, -0.5°C), the temperature control system 400 sends the third voltage pulse signal to the heating element 100 to increase the temperature of the heating element 100; when the current temperature is equal to the first preset threshold value, the temperature control system 400 sends the fourth voltage pulse signal to the heating element 100 to reduce the temperature of the heating element 100. In this way, the current temperature can be dynamically maintained at the first preset threshold value and not exceed the first preset threshold value.

[0074] In some embodiments, the temperature control method of the heating device inside the vehicle may further include:

[0075] S5000: When the current temperature is greater than the first preset threshold and the heating device is not touched, a third control signal is sent to the heating element 100 to control the heating element 100 to increase the temperature.

[0076] When the heating device is not touched, there is no risk of scalding for the occupant, so the temperature of the heating element 100 may exceed the first preset threshold and be as high as possible to increase the heating speed.

[0077] The third control signal may be a fifth voltage pulse signal having a duty cycle of a fifth preset ratio, where the fifth preset ratio is greater than a duty cycle threshold, for example, may be 100%.

[0078] If the temperature of the heating device is too high (for example, exceeding 70° C.), even if the occupant only touches the heating device once, burns may occur. Therefore, the temperature control method may further include:

[0079] It is determined whether the current temperature reaches a second preset threshold (eg, 70° C.), and if so, a fourth control signal is sent to the heating element 100 to dynamically maintain the current temperature at the second preset threshold.

[0080] The fourth control signal may be a sixth voltage pulse signal having a duty cycle of a sixth preset ratio, wherein the sixth preset ratio is equal to the duty cycle threshold, thereby dynamically maintaining the current temperature at the second preset threshold; or, the fourth control signal may be an alternating seventh voltage pulse signal and an eighth voltage pulse signal, wherein the duty cycle of the seventh voltage pulse signal is the seventh preset ratio, which is less than the duty cycle threshold (for example, 0%), and the duty cycle of the eighth voltage pulse signal is the eighth preset ratio, which is greater than the duty cycle threshold (for example, 100%). When the current temperature is equal to the second preset threshold, the seventh voltage pulse signal is sent to the heating element 100 to cool down the heating element 100. When the current temperature is less than the second preset threshold and the difference between the two reaches the second preset difference (for example, -0.5°C), the eighth voltage pulse signal is sent to the heating element 100 to heat up the heating element 100. In this way, the current temperature can be dynamically maintained at the second preset threshold and not exceed the second preset threshold.

[0081] In some embodiments, the temperature control method may further include:

[0082] When the judgment result of step S2000 is that the current temperature is not greater than the first preset threshold, a fifth control signal is sent to the heating element 100 to control the heating element 100 to increase the temperature.

[0083] When the current temperature does not reach the first preset threshold, no matter whether the heating device is touched or not, it will not cause burns to the occupants, so the heating element 100 needs to be heated up as quickly as possible to increase the heating speed.

[0084] The fifth control signal may be a ninth voltage pulse signal having a ninth preset duty cycle, where the ninth preset duty cycle is greater than a duty cycle threshold (eg, 100%), so that the heating element 100 is heated up.

[0085] like Figure 1 As shown, the temperature control system 400 may also be connected to the vehicle electronic control unit (ECU) 500 to control the temperature of the heating device through the ECU 500. Specifically, the occupant may send a start heating instruction and a stop heating instruction to the temperature control system 400 through the ECU 500. After receiving the start heating instruction, the temperature control system 400 turns on the heating and starts to execute the logic described in the above steps; after receiving the stop heating instruction, the temperature control system 400 immediately stops heating regardless of which logic in the above steps it is executing.

[0086] like Figure 3As shown, in an exemplary embodiment, the heating device may be integrated into the interior trim of a vehicle, thereby hiding it within the interior trim and avoiding affecting the aesthetics of the interior of the vehicle. Specifically, the interior trim may include a skeleton 10, a heating device 20, and an exterior layer 30 arranged in sequence from the inside to the outside. The exterior layer 30 covers the skeleton 10 and the heating device 20 to hide the skeleton 10 and the heating device 20, making the interior trim more aesthetically pleasing. In this way, the interior trim has both heating and touch sensing functions. By executing the temperature control method of the above embodiment through the temperature control system 400, temperature control can be achieved, enabling the interior trim to quickly heat up the interior of the vehicle without scalding the occupants.

[0087] The control logic of the temperature control method of the present invention is illustrated by the following several examples:

[0088] Example 1: When the current temperature (T) of the occupant is between the first preset threshold (T1) and the second preset threshold (T2), i.e., T1 < T < T2, the heating device is touched and the touch is maintained. In this example, after the occupant touches the heating device, the temperature control system 400 will send a first control signal to the heating element 100 to cool down the heating element 100. After the current temperature drops to T1, a second control signal will be sent to the heating element 100 to dynamically maintain the current temperature at T1.

[0089] Example 2: The occupant touches the heating device once when T1 < T < T2 and leaves before the current temperature drops to T1. In this example, after the occupant touches the heating device, the temperature control system 400 will send a first control signal to the heating element 100 to control its cooling. After the occupant leaves the heating device, the temperature control system 400 will send a third control signal to control its heating.

[0090] Example 3: The occupant touches the heating device once when T1 < T < T2 and leaves some time after the temperature drops to T1. At this time, after the occupant touches the heating device, the temperature control system 400 will send a first control signal to the heating element 100 to control its cooling until the current temperature drops to T1. Then the temperature control system 400 will send a second control signal to the heating element to dynamically maintain the current temperature at T1; after the occupant leaves the heating device, the temperature control system 400 will send a third control signal to heat up the heating element 100.

[0091] Example 4: The occupant touches the heating device multiple times when T1 < T < T2 and does not leave. At this time, after each touch, the temperature control system 400 will send a first control signal to the heating element 100 to control its temperature drop, and after each departure, the temperature control system 400 will send a third control signal to the heating element 100 to control its temperature rise; after the last touch, since the occupant does not leave and remains in contact all the time, T will drop to T1, and then the temperature control system 400 will send a second control signal to keep T dynamically at T1.

[0092] Example 5: The occupant touches multiple times when T1 < T < T2 and does not cool down to T1, and then leaves all the time. At this time, after each touch, the temperature control system 400 will send a first control signal to the heating element 100 to control its temperature drop, and after each departure, the temperature control system 400 will send a third control signal to the heating element 100 to make the heating element 100 warm up; after leaving and T rising to T2, the temperature control system 400 will send a fourth control signal to the heating element 100 to keep T dynamically at T2.

[0093] Example 6: The occupant touches multiple times when T1 < T < T2 and cools down to T1 at least once, and then leaves all the time. At this time, after each touch, the temperature control system 400 will send a first control signal to the heating element 100 to control its temperature drop, and after each departure, the temperature control system 400 will send a third control signal to the heating element 100 to make the heating element 100 warm up; when it cools down to T1 and is touched, then control T to dynamically remain at T1; after leaving and T rising to T2, the temperature control system 400 will send a fourth control signal to the heating element 100 to keep T dynamically at T2.

[0094] Example 7: The occupant does not touch when T1 < T < T2 and does not touch when T = T2. At this time, the temperature control system 400 will send a third control signal to the heating element 100 to make the heating element 100 warm up. When T = T2, the temperature control system 400 will send a fourth control signal to the heating element to keep T dynamically at T2.

[0095] Example 8: The occupant does not touch when T1 < T < T2 and touches when T = T2. At this time, the temperature control system 400 will send a third control signal to the heating element 100 to make it warm up. After being touched, the temperature control system 400 will send a first control signal to the heating element 100 to make it cool down. Then, according to whether it is touched subsequently, execute the corresponding control logic.

[0096] The control logic of the temperature control method of the present invention can be simply summarized as follows: when T < T1, the heating element 100 is heated regardless of whether the heating device is touched; when T1 < T ≤ T2, as long as the heating device is touched, the heating element 100 is controlled to cool down, and as long as the heating device is not touched, the heating element 100 is controlled to heat up; when T = T2 and the heating device is not touched, T is controlled to dynamically remain at T2; when T = T1 and the heating device is touched, T is controlled to dynamically remain at T1.

[0097] For the temperature control method of the heating device inside the vehicle according to the embodiment of the present invention, when the current temperature exceeds the first preset threshold and the heating device is touched, the heating element 100 is controlled to cool down to prevent the occupant from being scalded due to long-term contact with the heating device; when the heating device is not touched, the heating element 100 is heated up to the second preset threshold. On the one hand, it can achieve heating as quickly as possible, and on the other hand, it can also avoid the risk of the occupant being scalded due to short-term contact with the heating device when its temperature is too high.

[0098] As Figure 4 shown, another embodiment of the present invention provides a temperature control system 400 for a heating device inside a vehicle, which includes a first receiving module 410, a first judging module 420, a second judging module 430, and a first sending module 440.

[0099] The first receiving module 410 is configured to receive the current temperature of the heating element 100 sent by the temperature sensor 200 and the current sensing signal sent by the touch sensor 300.

[0100] The first judging module 420 is configured to judge whether the current temperature is greater than the first preset threshold.

[0101] The second judging module 430 is configured to judge whether the heating device is touched according to the current sensing signal.

[0102] The first sending module 440 is configured to send a first control signal to the heating element 100 to control the heating element 100 to cool down when the current temperature is greater than the first preset threshold and the heating device is touched.

[0103] In some embodiments, the first control signal may be a first voltage pulse signal, the duty cycle of which is a first preset ratio, and the first preset ratio is less than the duty cycle threshold, for example, it may be less than 10%.

[0104] The temperature control system 400 may further include a second sending module, configured to send a second control signal to the heating element when the current temperature drops to the first preset threshold and the heating device is touched, so that the current temperature dynamically remains at the first preset threshold.

[0105] The second control signal may be a second voltage pulse signal with a duty cycle of a second preset ratio, wherein the second preset ratio is equal to the duty cycle threshold, so that the current temperature is dynamically maintained at the first preset threshold. Alternatively, the second control signal may be an alternating third voltage pulse signal and a fourth voltage pulse signal, wherein the duty cycle of the third voltage pulse signal is a third preset ratio, which is greater than the duty cycle threshold (e.g., 100%), and the duty cycle of the fourth voltage pulse signal is a fourth preset ratio, which is less than the duty cycle threshold (e.g., 0). When the current temperature is less than the first preset threshold and the difference between the current temperature and the first preset threshold reaches the first preset difference (e.g., -0.5°C), the temperature control system 400 sends the third voltage pulse signal to the heating element 100 to increase the temperature of the heating element 100; when the current temperature is equal to the first preset threshold, the temperature control system 400 sends the fourth voltage pulse signal to the heating element 100 to reduce the temperature of the heating element 100, so that the current temperature can be dynamically maintained at the first preset threshold and does not exceed the first preset threshold.

[0106] The temperature control system may further include a third sending module, which is used to send a third control signal to the heating element 100 to control the heating element 100 to increase its temperature when the current temperature is greater than the first preset threshold and the heating device is not touched.

[0107] The third control signal may be a fifth voltage pulse signal having a duty cycle of a fifth preset ratio, where the fifth preset ratio is greater than a duty cycle threshold, for example, may be 100%.

[0108] The temperature control system may further include a third judgment module for judging whether the current temperature reaches a second preset threshold value, and if so, sending a fourth control signal to the heating element 100 to dynamically maintain the current temperature at the second preset threshold value.

[0109] The fourth control signal may be a sixth voltage pulse signal having a duty cycle of a sixth preset ratio, wherein the sixth preset ratio is equal to the duty cycle threshold, thereby dynamically maintaining the current temperature at the second preset threshold; or, the fourth control signal may be an alternating seventh voltage pulse signal and an eighth voltage pulse signal, wherein the duty cycle of the seventh voltage pulse signal is the seventh preset ratio, which is less than the duty cycle threshold (for example, 0%), and the duty cycle of the eighth voltage pulse signal is the eighth preset ratio, which is greater than the duty cycle threshold (for example, 100%). When the current temperature is equal to the second preset threshold, the seventh voltage pulse signal is sent to the heating element 100 to cool down the heating element 100. When the current temperature is less than the second preset threshold and the difference between the two reaches the second preset difference (for example, -0.5°C), the eighth voltage pulse signal is sent to the heating element 100 to heat up the heating element 100. In this way, the current temperature can be dynamically maintained at the second preset threshold and not exceed the second preset threshold.

[0110] The temperature control system may further include a fourth sending module, which is used to send a fifth control signal to the heating element 100 to control the heating element 100 to increase its temperature when the judgment result of the first judgment module 420 is no.

[0111] The fifth control signal may be a ninth voltage pulse signal having a ninth preset duty cycle, where the ninth preset duty cycle is greater than a duty cycle threshold (eg, 100%), so that the heating element 100 is heated up.

[0112] The temperature control system 400 may also include a second receiving module for receiving heating start instructions and heating shutoff instructions sent by the ECU 500. After receiving the heating start instruction, the heating is turned on and the logic described in the above steps is started to be executed; after receiving the heating shutoff instruction, the heating is stopped immediately regardless of which logic in the above steps is being executed.

[0113] The temperature control system 400 of the heating device inside the vehicle of the embodiment of the present invention controls the heating element 100 to cool down when the current temperature exceeds the first preset threshold value and the heating device is touched, so as to prevent the occupants from being burned due to long-term contact with the heating device; when the heating device is not touched, the heating element 100 is heated to the second preset threshold value, which can, on the one hand, enable heating to be achieved as quickly as possible, and on the other hand, can avoid the risk of scalding the occupants due to brief contact with the heating device due to its overly high temperature.

[0114] It should be noted that the present invention (e.g., the inventive concept, etc.) has been described in the specification of this patent document and / or illustrated in the drawings according to the exemplary embodiments; the embodiments of the present invention are presented only by way of example and are not intended to limit the scope of the present invention. The structure and / or arrangement of the elements of the inventive concept embodied in the present invention as described in the specification and / or illustrated in the drawings is merely illustrative. Although the exemplary embodiments of the present invention have been described in detail in this patent document, it is readily understood by those of ordinary skill in the art that equivalents, modifications, variations, etc. of the subject matter of the exemplary embodiments and alternative embodiments are possible and are considered to be within the scope of the present invention; all of these subject matters (e.g., modifications, variations, embodiments, combinations, equivalents, etc.) are intended to be included within the scope of the present invention. It should also be noted that various / other modifications, changes, substitutions, equivalents, alterations, omissions, etc. may be made in the configuration and / or arrangement of the exemplary embodiments (e.g., in terms of concepts, designs, structures, devices, forms, assemblies, constructions, means, functions, systems, processes / methods, steps, the order of process / method steps, operations, operating conditions, performances, materials, compositions, combinations, etc.) without departing from the scope of the present invention; all of these subjects (e.g., modifications, changes, embodiments, combinations, equivalents, etc.) are intended to be included within the scope of the present invention. The scope of the present invention is not intended to be limited to the subject matter (e.g., details, structures, functions, materials, behaviors, steps, sequences, systems, results, etc.) described in the specification and / or drawings of this patent document. Considering that the claims of this patent document will be appropriately interpreted as covering the full scope of the subject matter of the present invention (e.g., including any and all such modifications, changes, embodiments, combinations, equivalents, etc.); it should be understood that the terms used in this patent document are intended to provide a description of the subject matter of the exemplary embodiments, rather than as a limitation on the scope of the present invention.

[0115] It should also be noted that, depending on the exemplary embodiment, the present invention may include conventional technologies (such as technologies implemented and / or integrated in exemplary embodiments, modifications, variations, combinations, equivalents), or may include any other applicable technologies (present and / or future) with the ability to perform the functions and processes / operations described in the specification and / or illustrated in the figures. All of these technologies (such as technologies implemented in embodiments, modifications, variations, combinations, equivalents, etc.) are considered to be within the scope of the present invention of this patent document.

Claims

1. A method for controlling the temperature of a heating device inside a vehicle, characterized in that: The heating device includes a heating element, a temperature sensor and a touch sensor. The heating element, the temperature sensor and the touch sensor are all connected to a temperature control system. The temperature sensor is used to monitor the current temperature of the heating element. The touch sensor is used to sense whether the heating device is touched. The temperature control method is applied to the temperature control system. The temperature control method includes: receiving the current temperature of the heating element sent by the temperature sensor and the current sensing signal sent by the touch sensor; Determining whether the current temperature is greater than a first preset threshold; determining whether the heating device is touched according to the current sensing signal; When the current temperature is greater than a first preset threshold and the heating device is touched, a first control signal is sent to the heating element to control the heating element to cool down.

2. The temperature control method of the heating device in the vehicle interior according to claim 1, characterized in that: The first control signal is a first voltage pulse signal, a duty cycle of the first voltage pulse signal is a first preset ratio, and the first preset ratio is smaller than a duty cycle threshold.

3. The temperature control method of the heating device in the vehicle according to claim 1, characterized in that: Also includes: When the current temperature drops to the first preset threshold and the heating device is touched, a second control signal is sent to the heating element to dynamically maintain the current temperature at the first preset threshold.

4. The temperature control method of the vehicle interior heating device according to claim 3, characterized in that: The second control signal is a second voltage pulse signal with a duty cycle of a second preset ratio, and the second preset ratio is equal to the duty cycle threshold; when a voltage pulse signal with a duty cycle of the duty cycle threshold is provided to the heating element, the temperature of the heating element will remain unchanged dynamically; or, The second control signal is an alternating third voltage pulse signal and a fourth voltage pulse signal, the duty cycle of the third voltage pulse signal is a third preset ratio, the duty cycle of the fourth voltage pulse signal is a fourth preset ratio, the third preset ratio is greater than the duty cycle threshold, and the fourth preset ratio is less than the duty cycle threshold; Sending a second control signal to the heating element so that the current temperature is dynamically maintained at the first preset threshold value specifically includes: When the current temperature is less than the first preset threshold and the difference between the current temperature and the first preset threshold reaches a first preset difference, sending the third voltage pulse signal to the heating element to increase the temperature of the heating element; When the current temperature is equal to the first preset threshold, a fourth voltage pulse signal is sent to the heating element to cool the heating element.

5. The temperature control method of a heating device inside a vehicle according to claim 1, characterized in that: Also includes: When the current temperature is greater than the first preset threshold and the heating device is not touched, a third control signal is sent to the heating element to control the heating element to increase its temperature.

6. The temperature control method of the heating device in the vehicle interior according to claim 5, characterized in that: The third control signal is a fifth voltage pulse signal with a duty cycle of a fifth preset ratio, and the fifth preset ratio is greater than a duty cycle threshold.

7. The temperature control method of the heating device in the vehicle interior according to claim 5, characterized in that: Also includes: It is determined whether the current temperature reaches a second preset threshold value. If so, a fourth control signal is sent to the heating element to dynamically maintain the current temperature at the second preset threshold value.

8. The temperature control method of the vehicle interior heating device according to claim 7, characterized in that: The fourth control signal is a sixth voltage pulse signal having a duty cycle of a sixth preset ratio, and the sixth preset ratio is equal to the duty cycle threshold; or, The fourth control signal is an alternating seventh voltage pulse signal and an eighth voltage pulse signal, the duty cycle of the seventh voltage pulse signal is a seventh preset ratio, the duty cycle of the eighth voltage pulse signal is an eighth preset ratio, the seventh preset ratio is less than a duty cycle threshold, and the eighth preset ratio is greater than the duty cycle threshold; Sending a fourth control signal to the heating element so that the current temperature is dynamically maintained at the second preset threshold value specifically includes: When the current temperature is equal to the second preset threshold, sending the seventh voltage pulse signal to the heating element to cool the heating element; When the current temperature is less than the second preset threshold and the difference between the current temperature and the second preset threshold is less than the second preset difference, an eighth voltage pulse signal is sent to the heating element to increase the temperature of the heating element.

9. The temperature control method of a heating device in a vehicle interior according to claim 1, characterized in that: Also includes: When the current temperature is not greater than the first preset threshold, a fifth control signal is sent to the heating element to control the heating element to increase its temperature.

10. The temperature control method of the vehicle interior heating device according to claim 9, characterized in that: The fifth control signal is a ninth voltage pulse signal having a duty cycle of a ninth preset ratio, and the ninth preset ratio is greater than a duty cycle threshold.

11. The temperature control method of a heating device in a vehicle interior according to claim 1, characterized in that: The temperature control system is also connected to the vehicle electronic control unit, and the temperature control method further includes: Receiving a heating start instruction and a heating stop instruction sent by the vehicle electronic control unit; After receiving the start heating instruction, start heating; After receiving the heating off instruction, heating is stopped.

12. A temperature control system for a heating device inside a vehicle, characterized in that: The heating device includes a heating element, a temperature sensor and a touch sensor. The heating element, the temperature sensor and the touch sensor are all connected to the temperature control system. The temperature sensor is used to monitor the current temperature of the heating element. The touch sensor is used to sense whether the heating device is touched. The temperature control system includes: a first receiving module, configured to receive the current temperature of the heating element sent by the temperature sensor and the current sensing signal sent by the touch sensor; A first judgment module, used to judge whether the current temperature is greater than a first preset threshold; A second judging module, used for judging whether the heating device is touched according to the current sensing signal; The first sending module is used to send a first control signal to the heating element to control the heating element to cool down when the current temperature is greater than a first preset threshold and the heating device is touched.

13. The temperature control system of the vehicle interior heating device according to claim 12, characterized in that: The first control signal is a first voltage pulse signal, a duty cycle of the first voltage pulse signal is a first preset ratio, and the first preset ratio is smaller than a duty cycle threshold.

14. The temperature control system of the vehicle interior heating device according to claim 12, characterized in that: It also includes a second sending module, which is used to send a second control signal to the heating element when the current temperature drops to the first preset threshold and the heating device is touched, so as to dynamically maintain the current temperature at the first preset threshold.

15. The temperature control system of the vehicle interior heating device according to claim 14, characterized in that: The second control signal is a second voltage pulse signal with a duty cycle of a second preset ratio, and the second preset ratio is equal to the duty cycle threshold; when a voltage pulse signal with a duty cycle of the duty cycle threshold is provided to the heating element, the temperature of the heating element will remain unchanged dynamically; or, The second control signal is an alternating third voltage pulse signal and a fourth voltage pulse signal, the duty cycle of the third voltage pulse signal is a third preset ratio, the duty cycle of the fourth voltage pulse signal is a fourth preset ratio, the third preset ratio is greater than the duty cycle threshold, and the fourth preset ratio is less than the duty cycle threshold; Sending a second control signal to the heating element so that the current temperature is dynamically maintained at the first preset threshold value specifically includes: When the current temperature is less than the first preset threshold and the difference between the current temperature and the first preset threshold reaches a first preset difference, sending the third voltage pulse signal to the heating element to increase the temperature of the heating element; When the current temperature is equal to the first preset threshold, a fourth voltage pulse signal is sent to the heating element to cool the heating element.

16. The temperature control system of the vehicle interior heating device according to claim 12, characterized in that: It also includes a third sending module, which is used to send a third control signal to the heating element to control the heating element to increase its temperature when the current temperature is greater than the first preset threshold and the heating device is not touched.

17. The temperature control system of the vehicle interior heating device according to claim 16, characterized in that: The third control signal is a fifth voltage pulse signal with a duty cycle of a fifth preset ratio, and the fifth preset ratio is greater than a duty cycle threshold.

18. The temperature control system of the vehicle interior heating device according to claim 16, characterized in that: It also includes a third judgment module for judging whether the current temperature reaches a second preset threshold value. If so, a fourth control signal is sent to the heating element to dynamically maintain the current temperature at the second preset threshold value.

19. The temperature control system of the vehicle interior heating device according to claim 18, characterized in that: The fourth control signal is a sixth voltage pulse signal having a duty cycle of a sixth preset ratio, and the sixth preset ratio is equal to the duty cycle threshold; or, The fourth control signal is an alternating seventh voltage pulse signal and an eighth voltage pulse signal, the duty cycle of the seventh voltage pulse signal is a seventh preset ratio, the duty cycle of the eighth voltage pulse signal is an eighth preset ratio, the seventh preset ratio is less than a duty cycle threshold, and the eighth preset ratio is greater than the duty cycle threshold; Sending a fourth control signal to the heating element so that the current temperature is dynamically maintained at the second preset threshold value specifically includes: When the current temperature is equal to the second preset threshold, sending the seventh voltage pulse signal to the heating element to cool the heating element; When the current temperature is less than the second preset threshold and the difference between the current temperature and the second preset threshold is less than the second preset difference, an eighth voltage pulse signal is sent to the heating element to increase the temperature of the heating element.

20. The temperature control system of the vehicle interior heating device according to claim 12, characterized in that: It also includes a fourth sending module, which is used to send a fifth control signal to the heating element when the current temperature is not greater than the first preset threshold value, so as to control the heating element to increase its temperature.

21. The temperature control system of the vehicle interior heating device according to claim 20, characterized in that: The fifth control signal is a ninth voltage pulse signal having a duty cycle of a ninth preset ratio, and the ninth preset ratio is greater than a duty cycle threshold.

22. The temperature control system of the vehicle interior heating device according to claim 12, characterized in that: The temperature control system is also connected to the vehicle electronic control unit, and the temperature control system also includes a second receiving module for receiving a heating start instruction and a heating shutoff instruction sent by the vehicle electronic control unit, and turning on the heating after receiving the heating start instruction and stopping the heating after receiving the heating shutoff instruction.

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