Heated seat

FIELD: transport.

SUBSTANCE: invention relates to heated seat. Proposed seat comprises heating element, heating element temperature pickup, pickup controller and passenger presence pickup. Aforesaid controller controls feeding power to heating element in response to temperature signal of aforesaid pickup. Seat temperature pickup is arranged under seat to define seat surface temperature. Passenger presence pickup defines passenger presence in response to temperature variation defined by seat surface temperature pickup in preset time interval.

EFFECT: power savings, higher efficiency.

6 cl, 4 dwg

 

The technical field

The present invention relates to a seat heated with a heating device such as a seat warmer.

The level of technology

Seat warmer (heater for the seat)with a heating wire, which is the heating element, arranged in the non-woven fabric or urethane, until now often used for a seat of this type is heated. Heater seat is in the seat, so as to heat the side of the seat.

Figure 4 shows the seat, heated according to the prior art. As shown in figure 4, the seat (not shown) typically includes a heating element 1; the temperature sensor 2, which is thermally connected to the heating element 1 and which determines the temperature of the heating element 1; the actuating device 3, such as a switch, with which the user turns on/off the heater (heater seat, and adjustable regulator with which the user changes the set temperature; and a controller 4, which controls the supply of power to heating element 1 in accordance with the temperature determined by the temperature sensor 2 and the position of the actuator 3.

For the temperature sensor 2 is usually used is by thermistor. Normal control scheme is to use the phenomenon in which the resistance value of thermistor changes according to the temperature of the heating element 1, and the temperature control by defining this phenomenon.

For example, assuming that the actuator 3 is adjustable knob to change the set temperature, the temperature of the heating element 1 is determined using the temperature sensor 2, such as a thermistor. The controller 4 compares the temperature defined thus, with the temperature set by the user by using a custom controller. If the desired temperature has not been reached, the power is supplied to heating element 1. On the contrary, if the desired temperature has been achieved, the supply of energy to heating element 1 temporarily stops driving, therefore, temperature.

Subsequently, the power supply to the heating element 1 is resumed after the expiry of a specified period of time, because the power supply has been disconnected, or when the temperature of the heating element 1 was below the specified temperature level. Temperature control is carried out by repeating these operations.

Basically, the seat is heated in many cases set on the place of the seat voditelem on the front passenger seat. In particular, it is also possible that the front passenger seat is unoccupied. If at this time the Executive device for a passenger seat installed in the position of the heater, the heater will operate after the engine is started, despite the absence of a passenger, which leads to undesirable power consumption and deterioration of the efficiency of fuel use.

Accordingly, up to now, there have been proposed various devices as sensors for the seat to determine whether the seat is a passenger or not. For example, a known sensor for the seat has many of the cells located on the surface of the seat, to determine the partial pressure of lattices which are formed by rows placed along the surface of the seat in the direction of its width, and the columns located along the seat surface in a direction from front to back, while the sensor detects whether a passenger or no passenger seat, in accordance with the partial pressure determined by the cell (see, for example, JP-A-2002-87132).

The problem to which the invention is directed

However, the design according to the prior art requires multiple cells to determine the pressure. Therefore, the number of components and the weight of the seat is increased, giving the image is m, to increase rates and deterioration of the efficiency of fuel use.

The present invention solves the disadvantages of the prior art and is aimed at creating a more comfortable seat, which determines the presence of a passenger on the seat by determining only the surface temperature of the seat.

Means for solving the problem

For solving the problem according to the prior art seat heated according to the present invention contains a temperature sensor of the seat surface, which is located under the floor surface of the seat and which determines the temperature of the seat surface; and a device for determining the presence of a passenger, which determines whether the passenger on the seat or not, the definition of occupied seat or not, is performed in accordance with the value of the temperature change defined by the temperature sensor seat within a specified period of time.

Due to this configuration, it is possible to easily determine whether the person is sitting on the seat or not. If anyone on the seat there, the power supply to the heating device is stopped, and the like, which, in turn, helps save energy and improve fuel consumption.

The advantage of the invention

Seat heated according to the present invention is directed is on to create the seat, which can help save energy and improve the efficiency of fuel utilization by identifying, occupied or not occupied seat by determining the surface temperature of the seat.

Brief description of drawings

Figure 1 - block diagram, heated seats according to the first variant implementation of the present invention;

figure 2 is an illustrative view showing a conceptual illustration of a temperature change of the seat;

figure 3 is a perspective view of the heated seats, showing the location of the temperature sensor surface of the seat; and

4 is a block diagram heated seats according to the prior art.

The list of reference positions

1 - Heating element

2 - Temperature sensor

3 - actuator

4 - Controller

5 - temperature Sensor of the seat surface

6 - Device presence passenger seat

The best way of carrying out the invention

The first invention relates to heated seats, containing a heating element placed on the seat, a temperature sensor for determining the temperature of the heating element, a controller for controlling the supply of energy to heating element depending on the temperature determined by the temperature sensor, the temperature of the seat surface, which is located under the floor surface of the seat and which determines the surface temperature of the seat, as well as the device for determining the presence of a passenger on the seat, which determines, whether the person is sitting on the seat or not, the device determining the presence of a passenger on the seat defines occupied seat or not, in accordance with the value of the temperature change defined by the temperature sensor surface of the seat within a specified period of time. So you can easily determine whether the person on the seat or not, without using a sensor determining the presence of a passenger on the seat, such as a pressure sensor.

In the second invention, the controller according to the first invention, in particular, stops power supply to the heating element when the result of determination performed by the determination device of the presence of the passenger, shows that the seat is not occupied, so that can be prevented unwanted energy consumption, resulting in energy savings and improve the efficiency of fuel use.

In the third invention, the controller according to the first invention, in particular, reduces the rate of energy supply to the heating element when the result of determination performed by the determination device of the presence of the passenger displays the, that seat is not occupied, so that can be prevented unwanted energy consumption, resulting in energy savings and improve the efficiency of fuel use. In addition, can be made more comfortable seat, which creates an appropriate sense of warmth, even if people sat down again.

In the fourth invention, the device for determining the presence of a passenger on the seat described first to third invention, in particular, specifies that occupied the seat or not, at each given time period. Therefore, it is possible to automatically determine that the seat is occupied, when a person sits down again, even after the seat has been already defined as not employed, which can be started again, the power supply to the heating element. Therefore, it may be made more comfortable seat.

In the fifth invention, the sensor surface temperature of the seat in accordance with the first to fourth invention, in particular, is located between the center of the seat surface and the front side surface of the seat, due to which the temperature of the contact region (legs) of a person can be determined more easily. The difference between the temperature obtained when the seat is occupied, and the temperature obtained when the seat is not occupied, it becomes more clear so that you can pain the e to reliably determine occupied seat or not taken.

In the sixth invention, in particular, the temperature sensor of the seat surface, is described from the first to the fifth invention, is not placed directly over the heating element, whereby the temperature sensor of the seat surface is made less susceptible to changes in temperature of the heating element and can reliably detect the change resulting from the occupation of the seat by a person.

Variant implementation of the present invention will now be described with reference to the drawings. However, the present invention is not limited to this embodiment of the invention.

The first variant embodiment of the invention

Figure 1 is a block diagram of the heated seats according to the first variant implementation of the present invention. Figure 1 is a heating element 1 is a heating wire, temperature sensor 2 is, for example, a thermistor, located along the heating element 1 and is thermally connected therewith. The controller 4 is designed to control the flow of energy to the heating element 1 in accordance with the temperature determined by the temperature sensor 2. Sensor 5 temperature of the seat surface is, for example, a thermistor. The temperature sensor of the seat surface is made to determine the temperature of the surface is rnost seat and built-in location under the seat surface. The device 6 to determine the presence of a passenger on the seat is made to determine, based on the temperature determined by the sensor 5, the surface temperature of the seat occupied seat or not.

The following describes the operation and effect of operation heated seats, made as above.

The heater is, for example, heater, seat used car. Some heaters have a configuration that allows the user to turn on/off the power supply using a custom controller, switch or the like, or arbitrarily change the set temperature. The temperature sensor 2, which is, for example, a thermistor thermally connected to the heating element 1 and is designed in such a way that the resistance value changes depending on the temperature of the heating element 1.

The controller 4 calculates the temperature of the heating element 1, on the basis of resistance values, a specific temperature sensor 2; determines to apply or remove power from the heating element 1 in accordance with the calculated thus temperature and performs the operation control so that the heating element 1 has an optimal temperature.

Meanwhile, when the user left his seat, while re is luchtel, custom controller and the like, which are made to manage the user remains on, the heater seat will work. In addition, while in this state, the seat heater will work in a similar way, when the engine is started next time.

Seat heated also often be found for driver seat and passenger seat in the car, and also a high possibility that the front passenger seat will remain vacant. If the phenomenon mentioned above, occurs at this time, the seat heater is supplied with energy, although no one in the front passenger seat, which consumes unwanted energy and reduces fuel efficiency. The same applies in the case when the driver left his seat.

Figure 2 is an illustrative view showing a conceptual illustration of the changes in the surface temperature of the seat when the seat is occupied or not occupied.

As for the temperature change obtained when the passenger sits on the seat, and temperature change obtained when no one is in the seat, the growth temperature of the seat surface becomes larger, because the influence of the body temperature and the ability to retain heat increases when the seat is occupied.

Namely, cordobesa attention to the change in temperature of thermal surface, appear when the power supply to heating element 1 starts before will be a specified period of time, the amount of heat exchange achieved when the seat is occupied, becomes larger than the amount of heat generated when the seat is not occupied.

Therefore, when changing the temperature, which determines the sensor 5 temperature of the seat surface when the power supply to heating element 1 starts before the end of a specified period of time T, is given by the temperature (temperature determination HT) or more, the seat can be detected as busy. When the temperature change is smaller than the preset temperature (temperature determination HT), the seat can be defined as not employed.

The temperature change obtained when the ambient temperature is 0C, after it has passed, for example, three minutes is 30 degrees, when the seat is occupied, and about five degrees when the seat is not occupied. In this case, a reliable determination can be made that the seat is occupied or unoccupied until the temperature determination HT is set to about 15 degrees.

From the above explanation it is possible to determine whether the currently seat or not taken, by placing sensor 5 temperature of the seat surface, such as a thermistor, under the surface the Yu seat and determine the surface temperature of the seat, to thereby determine a change in the surface temperature of the seat.

As mentioned above, you can determine occupied seat or not taken, by determining changes in the surface temperature of the seat. Consequently, there is the possibility to easily define, occupied the seat or not employed, without the use of a sensor determining the presence of a passenger on the seat, such as a pressure sensor.

The temperature sensor 2 is usually monitors the temperature in accordance with the temperature of the heating element 1. However, due to the ability to determine the temperature of the seat surface of the controller 4 can control the temperature close to the temperature of the human body, through the implementation of temperature control through the use temperature of thermal surface during the determination, occupied the seat or unoccupied; therefore, be more convenient temperature control.

The above descriptions have been made on the definition, occupied the seat or unoccupied based on the magnitude of temperature change is measured by a sensor 5 temperature of the seat surface, starting from the moment when power is applied to heating element 1, until then, until a specified period of time. However, as shown in figure 2, the temperature achieved in a stable state is AI, also changed between when the seat is occupied and when the seat is not occupied. Therefore, the definition can also be done starting from the absolute value of the temperature, rather than the magnitude of temperature change, when occupied seat or not taken.

At ambient temperature, is equal to, for example, 0C, the temperature employed seat reaches about 30C. after five minutes passed since the start of the energy supply, the temperature unoccupied seat reaches about 10C. In this case, as the temperature of the definition of HT is set at 20C, the seat is determined as busy, when the temperature determined by sensor 5 temperature of the seat surface in a given time period is 20C or more, while the seat is defined as not employed when the temperature is less than 20C, which can be defined, occupied the seat or not occupied seat.

The basic requirement for determining a specified time T and the temperature of determination of NT is the measurement of the temperature characteristics obtained when the seat is occupied, and temperature characteristics obtained when the seat is not occupied.

When the result of determination performed by the device 6 to determine the presence of a passenger on the seat, shows that the seat is not occupied, the controller 4 according to the present variant Khujand is the implementation of the invention disables the power to the heating element 1, thus, the power supply to the heating element 1 can be disabled; for example, when no one is in the front passenger seat, and when the driver leaves the driver's seat. Therefore, can be prevented unwanted energy consumption, which leads to increased efficiency of fuel use.

When the result of determination performed by the device 6 to determine the presence of a passenger on the seat, shows that the seat is not occupied, the controller 4 according to the present variant embodiment of the invention reduces the rate of energy supply to heating element 1. For example, when the user left his seat, the feed rate of energy decreases (i.e. the preset temperature is reduced), thereby the power consumption can be reduced. In addition, since the power is constant, the appropriate feeling of heat gain, when the user sits on the seat next time. Thus, it can be made more comfortable seat, equipped with a heater. This is especially effective for the driver's seat on which the driver inevitably sits while driving.

In addition, the device 6 to determine the presence of a passenger seat according to the present variant embodiment of the invention determines, occupied the seat or not Zan is the seat, at each given time period. As a result, even when the user left his seat (i.e. not busy) even after the seat was once defined as busy, not busy state can be detected automatically, allowing you to turn off the power supply to the heating element 1 and to decrease the rate of supply of energy. Therefore, you can exclude unwanted energy consumption and create a more comfortable seat.

In addition, if the reasoning given for the case where the feed rate of energy decrease after only seat was identified as unoccupied power supply to heating element 1 and the power cut exercise again, even when the seat is not occupied. Therefore, if the user sits, the temperature determined by sensor 5 temperature of the seat surface, increases with temperature obtained when the seat is unoccupied, as mentioned earlier.

Accordingly, the temperature sensor 5, the surface temperature of the seat is determined in a specified period of time; for example, after it has passed the 10 minutes after the start of power supply, which can be defined, occupied the seat or not employed by the temperature difference determined in this way. In addition, the power supply to heating element 1 control is planned at this time, in order to return the temperature to the initial set temperature (the temperature obtained before reducing the rate of energy supply). Therefore, the seat is heated with the original given temperature, when the seat is occupied, and set the temperature lower when the seat is not occupied, because of what can be done to try to save energy. Thus, it can be made the seat with a more efficient heater.

If the sensor 5, the surface temperature of the seat is installed, for example, in the center of the seat surface, the sensor 5, the surface temperature of the seat is located in the middle of the perineum and thus has little contact with the human body. On the contrary, when the sensor 5, the surface temperature of the seat is in position on the back surface of the seat sensor 5 surface temperature of the seat from labour in contact with the human body when the user is sitting in a position that is shifted forward. In this case, the region close to the sensor 5, the surface temperature of the seat is exposed to the air, and the property of the heater to keep the heat deteriorates due to the fact that the temperature sensor of the seat surface is out of contact with the human body. Therefore, the temperature sensor 5, the surface temperature of the seat is reduced.

Because the difference IU the control temperature, certain sensor 5 temperature of the seat surface when the seat is occupied, and the temperature determined by the same sensor when the seat is not occupied, becomes smaller, and it becomes difficult to determine, occupied the seat or the seat is not occupied.

Accordingly, the sensor 5, the surface temperature of the seat according to the present variant embodiment of the invention is the location of the seat between the center of the seat surface in its lateral direction and the front side surface of the seat, as shown in figure 3, due to which the temperature sensor of the seat surface becomes easier to contact with the back part of the thighs of the person. As a result, the property of thermal conductivity and retention temperature, which is realised by body temperature, increasing, thus, the temperature near the sensor 5, the surface temperature of the seat is likely to increase. In the result, therefore, the temperature determined by sensor 5 temperature of the seat surface, it becomes easier to increase when the seat is occupied. Therefore, the difference between the temperature obtained when the seat is occupied, and the temperature obtained when the seat is not occupied, it becomes more clear, therefore, possible to reliably determine occupied the seat or the seat is not occupied.

Figure 3 is a view layer, which is the temperature sensor of the seat surface in the Central region, which is located in an intermediate position between the center of the seat surface and the front side surface of the seat. A similar effect is obtained while the probe surface temperature of the seat is placed along the line in an intermediate position between the center of the seat surface and the front side surface of the seat, where the sensor surface temperature of the seat just in contact with the human body (for example, hip and so on).

Thus, the sensor 5 temperature of the seat surface can be designed in such a way as to avoid dangling plot coating the surface of the seat so that the detection of the presence of a passenger could be done without compromising the structural characteristics of the seat.

Meanwhile, when the sensor 5, the surface temperature of the seat is made in the position directly above the heating element 1, the sensor is exposed to the temperature of the heating element 1. Even when seat is not occupied, the value of the temperature change becomes greater. Therefore, the sensor 5, the surface temperature of the seat is not positioned directly above the heating element 1, due to which it becomes less susceptible to changes in temperature of the heating element 1 and can more reliably determine the temperature change, due to the fact that the man who sat down to the seat.

Although the definition of perform, occupied the seat or not taken, on the basis of a difference between the temperature obtained when the seat is occupied, and the temperature when the seat is not occupied. Temperature characteristic obtained when the seat is occupied, and temperature characteristic obtained when the seat is not occupied, differ from each other in accordance with the internal temperature of the cabin of the vehicle. Therefore, the temperature determination can also be switched in accordance with the internal temperature of the cabin of the vehicle.

In addition, when the internal temperature of the cabin of the vehicle is high, and when it becomes difficult to determine, occupied the seat or not taken, by reducing the difference between the temperature obtained when the seat is occupied, and the temperature obtained when the seat is free, the heating element 1 is not powered all the time, because of the high internal temperature of the cabin of the vehicle and eliminate the need to activate the heater seat. It becomes unnecessary to switch the control power in accordance with the definition employed seat or not busy. Therefore, in the environment where the seat heater is not working (no need to activate it), such as high internal temperature is dependent on the cab of the vehicle, do not define, occupied the seat or freely, it is desirable to determine the value of a definition (preset time and temperature definitions) due to the limited temperature range over which the seat heater.

As mentioned above, you can easily determine occupied seat or freely, by determining changes in the surface temperature of the seat. In addition, the flow of energy to the heating element 1 is stopped when the seat is not occupied, which is energy saving and improving the efficiency of fuel use.

This patent application is based on patent application of Japan No. 2007-110240, filed on April 19, 2007, and the patent application of Japan No. 2008-099902 filed April 8, 2008, the contents of which are included here by reference.

Although the previously described various embodiments of the present invention, the present invention is not limited to objects made in the embodiment of the invention. The present invention also may be modified or applied by specialists in the art based on the description of the present patent application and is well known technologies, all of which are within the involving protection of the invention.

Industrial applicability

As mentioned above, the seat is heated in accordance with the present image is meniu can determine occupied seat or not taken, by determining the surface temperature of the seat. Therefore, the present invention can be applied and developed in determining the actuation of an air cushion (on working seat and the inclusion of the working area).

1. Seat heated, containing a heating element, a temperature sensor for determining the temperature of the heating element, a controller for controlling the supply of energy to the heating element in accordance with the temperature determined by the temperature sensor, the temperature sensor of the seat surface, which is located under the floor surface of the seat and which determines the temperature of the seat surface, and a device for determining the presence of a passenger, which determines whether sitting the passenger seat or not, the device presence passenger determines occupied seat or not taken, in accordance with the value of the temperature change, temperature sensor surface of the seat within a specified period of time.

2. Seat of claim 1, wherein the controller stops the power supply to the heating element when the result of determination obtained by the device to determine the presence of a passenger, shows that the seat is not occupied.

3. Seat according to claim 1, in which regulate which reduces the rate of energy supply to the heating element, when the result of determination performed by the determination device of the presence of the passenger, shows that the seat is not occupied.

4. Seat according to claim 1, in which device the presence of the passenger determines occupied seat or not taken, in each given period of time.

5. Seat according to claim 1, in which the temperature sensor of the seat surface is located between the center of the seat surface and the front side surface of the seat.

6. Seat according to claim 1, in which the sensor surface temperature of the seat is not located directly above the heating element.



 

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