Integrated automatic constant temperature steering wheel and temperature control method thereof

Abstract

The application provides an integrated automatic constant-temperature steering wheel and a temperature control method thereof, comprising a temperature information acquisition unit, a steering wheel constant-temperature evaluation index calculation unit, a steering wheel constant-temperature control mode selection unit, a steering wheel temperature regulation execution unit, a heater and a refrigerator. The temperature information acquisition unit is used for acquiring an external environment temperature, an internal environment temperature and a steering wheel surface temperature. The steering wheel constant-temperature evaluation index calculation unit is used for calculating an external environment temperature evaluation factor, an internal environment temperature evaluation factor and a steering wheel surface temperature evaluation factor. The steering wheel constant-temperature control mode selection unit is used for selecting a suitable steering wheel constant-temperature control mode from a comfort mode, a constant-temperature mode and an off mode according to the steering wheel constant-temperature evaluation index. The steering wheel temperature regulation execution unit is used for controlling the switching of the heater and the refrigerator according to the steering wheel constant-temperature control mode, so that the steering wheel surface temperature is kept within a set value.

Description

TECHNICAL FIELD

[0001] The present application relates to an integrated automatic constant temperature steering wheel and a temperature control method thereof. BACKGROUND

[0002] At present, the comfort of a car has become an important point for consumers to consider when purchasing a car. The steering wheel is an important part that a driver always contacts when driving a car. Whether the temperature of the steering wheel surface meets the comfort needs of the driver is an important factor in determining the comfort of the car.

[0003] At present, only a small part of the market has a steering wheel heating function. The steering wheel heating function can only heat the part of the steering wheel that the driver holds in cold environments. The temperature control method is single and does not have an automatic constant temperature function. It cannot adjust the temperature according to the temperature preferences of different drivers.

[0004] At present, the car equipped with the steering wheel heating function does not have a steering wheel cooling function, which cannot meet the comfort needs of the driver when driving in hot weather. In addition, the steering wheel equipped with a separate cooling unit has the problem of occupying too much space and interfering with the original unit of the steering wheel.

[0005] To improve the above problems, the present application provides an integrated automatic constant temperature steering wheel and a temperature control method thereof. SUMMARY

[0006] The purpose of the present application is to provide an integrated automatic constant temperature steering wheel and a temperature control method thereof to solve the problems faced in the background art. To achieve the above purpose, the present application provides the following technical solutions.

[0007] An integrated automatic constant temperature steering wheel and a temperature control method thereof, comprising: a temperature information acquisition unit, a steering wheel constant temperature evaluation index calculation unit, a steering wheel constant temperature control mode selection unit, a steering wheel temperature regulation execution unit, a heater, and a cooler.

[0008] The temperature information acquisition unit is used to obtain the outside environment temperature T1, the inside environment temperature T2, and the steering wheel surface temperature T3.

[0009] The steering wheel constant temperature evaluation index calculation unit is used to calculate the outside environment temperature evaluation factor I1, the inside environment temperature evaluation factor I2, and the steering wheel surface temperature evaluation factor I3 according to the outside environment temperature T1, the inside environment temperature T2, and the steering wheel surface temperature T3. The calculation formula of the outside environment temperature evaluation factor I1, the inside environment temperature evaluation factor I2, and the steering wheel surface temperature evaluation factor I3 is as follows:

[0010]

[0011]

[0012]

[0013] The steering wheel constant temperature evaluation index I is calculated according to the external environment temperature evaluation factor I1, the internal environment temperature evaluation factor I2 and the steering wheel surface temperature evaluation factor I3, and the steering wheel constant temperature evaluation index I is the working basis of the steering wheel constant temperature control mode selection unit, and the calculation formula of the steering wheel constant temperature evaluation index I is as follows:

[0014]

[0015] Wherein, w1, w2, w3 are the weighted values of each single index; f1, f2, f3 are the conversion evaluation factors of each single index based on experience design;

[0016] The steering wheel constant temperature control mode selection unit is used to select a suitable steering wheel constant temperature control mode M according to the steering wheel constant temperature evaluation index I, and the steering wheel constant temperature control mode M is (1) a comfort mode, (2) a constant temperature mode, and (3) an off mode.

[0017] The steering wheel temperature regulation execution unit is used to control the switches of the heater and the cooler according to the steering wheel constant temperature control mode M, so that the steering wheel surface temperature is maintained within the set value.

[0018] The comfort mode refers to maintaining the steering wheel surface temperature within the human comfortable temperature of 18-25℃.

[0019] When the working mode is the comfort mode, the working rules of the heater and the cooler are as follows:

[0020] When I≤L1, the heater works, and the heater stops working when I>L1; when I≥L2, the cooler works, and the cooler stops working when I<L2; when L1<I<L2, the heater and the cooler are both off.

[0021] Wherein, L1, L2 are the comfort mode temperature evaluation factors, and L1<L2.

[0022]

[0023]

[0024] Wherein, K1=k+18, K2=k+25, and n is an anti-interference factor.

[0025] Wherein, k is the Kelvin temperature conversion coefficient, and k=273.15.

[0026] The constant temperature mode refers to keeping the steering wheel surface temperature within the temperature set value T0±2℃; when the working mode is the constant temperature mode, the working rules of the heater and the cooler are:

[0027] When I≤L3, the heater works, and the heater stops working when I>L3; when I≥L4, the cooler works, and the cooler stops working when I<L4; when L3<I<L4, both the heater and the cooler are closed;

[0028] Wherein, L3, L4 are constant temperature mode temperature evaluation factors, and L3<L4;

[0029]

[0030]

[0031] Wherein, K3=k+T0-2, K4=k+T0+2, n is an anti-interference factor;

[0032] Wherein, k is the Kelvin temperature conversion coefficient, k=273.15.

[0033] The closed mode refers to keeping the heater and the cooler in the closed state.

[0034] The heater is made of electric conductor heating material and is uniformly distributed inside the spoke and outside the steering wheel rim.

[0035] The cooler is connected with the vehicle air conditioning pipeline and shares the cooling source with the air conditioning system.

[0036] The temperature information acquisition unit, the steering wheel constant temperature evaluation index calculation unit, the steering wheel constant temperature control mode selection unit and the steering wheel temperature regulation and control execution unit transmit data and send instructions through the controller area network bus.

[0037] The temperature information acquisition unit, the steering wheel constant temperature evaluation index calculation unit, the steering wheel constant temperature control mode selection unit and the steering wheel temperature regulation and control execution unit need to be embedded in the steering wheel body inside the premise of not interfering with the original unit inside the steering wheel body; the original unit inside the steering wheel body is the airbag unit and the multifunctional key unit.

[0038] The steering wheel temperature regulation and control execution unit can be linked with the vehicle system, the intelligent voice system and the face recognition system; through the vehicle system and the intelligent voice system, the steering wheel constant temperature control mode M and the temperature set value T0 can be adjusted; through the face recognition system, the steering wheel constant temperature control mode M and the temperature set value T0 selected by the driver last time driving can be automatically restored. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 This is a schematic flowchart of an integrated automatic temperature - controlled steering wheel and its temperature control method according to the present invention. Specific embodiments

[0040] In order to more clearly demonstrate the technical solution of the present invention, the present invention will be described in detail below based on the accompanying drawings and specific embodiments.

[0041] As Figure 1 shown, an embodiment of the present invention provides an integrated automatic temperature - controlled steering wheel and its temperature control method for improving the hand comfort of vehicle drivers. The invention includes a temperature information acquisition unit, a steering wheel constant - temperature evaluation index calculation unit, a steering wheel constant - temperature control mode selection unit, a steering wheel temperature regulation execution unit, a heater, and a cooler. The method includes the following steps:

[0042] The temperature information acquisition unit is used to: collect the external environment temperature T1 through a temperature sensor installed inside the front bumper of the vehicle, collect the internal environment temperature T2 through a temperature sensor installed under the center console, and collect the steering wheel surface temperature T3 through a temperature sensor installed inside the outer ring of the steering wheel.

[0043] The steering wheel constant - temperature evaluation index calculation unit is used to calculate the external environment temperature evaluation factor I1, the internal environment temperature evaluation factor I2, and the steering wheel surface temperature evaluation factor I3 based on the external environment temperature T1, the internal environment temperature T2, and the steering wheel surface temperature T3, so as to obtain the steering wheel constant - temperature evaluation index I.

[0044] The steering wheel constant - temperature evaluation index I is the working basis of the steering wheel constant - temperature control mode selection unit.

[0045] The steering wheel constant - temperature control mode selection unit is used to select an appropriate steering wheel constant - temperature control mode M from the comfort mode, the constant - temperature mode, and the off mode according to the steering wheel constant - temperature evaluation index I.

[0046] The comfort mode is to keep the steering wheel surface temperature within the human - comfortable temperature range of 18°C to 25°C;

[0047] When the working mode is the comfort mode, the working rules of the heater and the cooler are as follows:

[0048] When I ≤ L1, the heater works, and the heater stops working when I > L1;

[0049] When I ≥ L2, the cooler works, and the cooler stops working when I < L2;

[0050] When L1 < I < L2, both the heater and the cooler are turned off;

[0051] Among them, L1 and L2 are comfort mode temperature evaluation factors, and L1 < L2;

[0052]

[0053]

[0054] Among them, K1 = k + 18, K2 = k + 25, and n is an anti-interference factor;

[0055] Among them, k is the Kelvin temperature conversion coefficient, and k = 273.15.

[0056] The constant temperature mode means that the temperature on the surface of the steering wheel is maintained within the temperature set value T0 ± 2°C;

[0057] When the working mode is the constant temperature mode, the working rules of the heater and the cooler are as follows:

[0058] When I ≤ L3, the heater works, and the heater stops working when I > L3;

[0059] When I ≥ L4, the cooler works, and the cooler stops working when I < L4;

[0060] When L3 < I < L4, both the heater and the cooler are turned off;

[0061] Among them, L3 and L4 are constant temperature mode temperature evaluation factors, and L3 < L4;

[0062]

[0063]

[0064] Among them, K3 = k + T0 - 2, K4 = k + T0 + 2, and n is an anti-interference factor;

[0065] Among them, k is the Kelvin temperature conversion coefficient, and k = 273.15.

[0066] The off mode means that both the heater and the cooler are kept off.

[0067] The steering wheel temperature control execution unit is used to control the on and off of the heater and the cooler according to the steering wheel constant temperature control mode M, so that the temperature on the surface of the steering wheel is maintained within the set value.

[0068] The above content describes the main features and basic principles of the present invention. The specific implementation manners of the present invention are not limited to the above manners. As long as various non-substantive improvements are made in accordance with the method idea and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. An integrated automatic thermostatic steering wheel, characterized in that, It consists of: a temperature information acquisition unit, a steering wheel constant temperature evaluation index calculation unit, a steering wheel constant temperature control mode selection unit, a steering wheel temperature regulation execution unit, a heater, and a cooler; The temperature information acquisition unit is used to: collect the external ambient temperature T1 through a temperature sensor installed inside the front bumper of the vehicle, collect the internal ambient temperature T2 through a temperature sensor installed below the center console, and collect the steering wheel surface temperature T3 through a temperature sensor installed inside the outer ring of the steering wheel; The steering wheel constant temperature evaluation index calculation unit is used to calculate the external ambient temperature evaluation factor I1, the internal ambient temperature evaluation factor I2, and the steering wheel surface temperature evaluation factor I3 according to the external ambient temperature T1, the internal ambient temperature T2, and the steering wheel surface temperature T3. The calculation formulas for the external ambient temperature evaluation factor I1, the internal ambient temperature evaluation factor I2, and the steering wheel surface temperature evaluation factor I3 are as follows: Calculate the steering wheel constant temperature evaluation index I according to the external ambient temperature evaluation factor I1, the internal ambient temperature evaluation factor I2, and the steering wheel surface temperature evaluation factor I3. The calculation formula for the steering wheel constant temperature evaluation index I is as follows: Where, w1, w2, and w3 are the weighting values of each single index; f1, f2, and f3 are the conversion evaluation factors of each single index designed based on experience; The steering wheel constant temperature control mode selection unit is used to select a suitable steering wheel constant temperature control mode M according to the steering wheel constant temperature evaluation index I. The steering wheel constant temperature control mode M is respectively (1) the comfort mode, (2) the constant temperature mode, and (3) the off mode; The steering wheel temperature regulation execution unit is used to control the switches of the heater and the cooler according to the steering wheel constant temperature control mode M, so that the steering wheel surface temperature is maintained within the set value.

2. The integrated automatic thermostatic steering wheel according to claim 1, characterized in that, The comfort mode is to keep the steering wheel surface temperature within the human comfort temperature range of 18°C to 25°C; When the working mode is the comfort mode, the working rules of the heater and the cooler are: When I ≤ L1, the heater works and stops working when I > L1; When I ≥ L2, the cooler works and stops working when I < L2; When L1 < I < L2, both the heater and the cooler are turned off; Where, L1 and L2 are the temperature evaluation factors of the comfort mode, and L1 < L2; Where, K1 = k + 18, K2 = k + 25, and n is the anti-interference factor; Where, k is the Kelvin temperature conversion coefficient, k = 273.

15.

3. The integrated automatic thermostatic steering wheel according to claim 1, characterized in that, The constant temperature mode is to keep the steering wheel surface temperature within the range of the temperature set value T0 ± 2°C; When the working mode is the constant temperature mode, the working rules of the heater and the cooler are: When I ≤ L3, the heater works and stops working when I > L3; When I ≥ L4, the cooler works and stops working when I < L4; When L3 < I < L4, both the heater and the cooler are turned off; Where, L3 and L4 are the temperature evaluation factors of the constant temperature mode, and L3 < L4; Where K3 = k + T0 - 2, K4 = k + T0 + 2, and n is the anti-interference factor; Where k is the Kelvin temperature conversion coefficient, k = 273.

15.

4. The integrated automatic thermostatic steering wheel according to claim 1, characterized in that, The shutdown mode refers to keeping both the heater and the cooler in a closed state.

5. An integrated automatic thermostatic steering wheel according to claim 1, characterized in that, The heater is made of an electrically conductive heating material and is evenly distributed on the outer rim and inside the spokes of the steering wheel.

6. The integrated automatic thermostatic steering wheel according to claim 1, characterized in that, The refrigerator is connected to the vehicle's air conditioning piping and shares a cooling source with the air conditioning system.

7. The integrated automatic thermostatic steering wheel according to claim 1, characterized in that, The temperature information acquisition unit, steering wheel constant temperature evaluation index calculation unit, steering wheel constant temperature control mode selection unit, and steering wheel temperature regulation execution unit transmit data and send instructions to each other via a controller local area network bus.

8. The integrated automatic thermostatic steering wheel according to claim 1, characterized in that, The temperature information acquisition unit, steering wheel constant temperature evaluation index calculation unit, steering wheel constant temperature control mode selection unit, and steering wheel temperature regulation execution unit need to be embedded inside the steering wheel body without interfering with the original units inside the steering wheel body; the original units inside the steering wheel body are the airbag unit and the multi-function button unit.

9. An integrated automatic thermostatic steering wheel according to claim 1, characterized in that, The steering wheel temperature control unit can be linked with the vehicle infotainment system, intelligent voice system, and facial recognition system. The steering wheel constant temperature control mode M and temperature setpoint T0 can be adjusted through the vehicle infotainment system and intelligent voice system. The steering wheel constant temperature control mode M and temperature setpoint T0 selected by the driver during the last driving is automatically restored through the facial recognition system.

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