JP2008170120A - Heater control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heater control device eliminating a lack of temperature rise so as not to impair comfortableness by changing a cut-off failure timer time to extend a heater heating time at the occurrence of conditions under which a portion to be heated by a heater is cooled. <P>SOLUTION: When a heating time from the start of operation exceeds a timer time T1 in a flow 9, a CPU 2 is operated to proceed into a flow 10 to automatically switch off the heater 1, while in the case of not exceeding the timer time T1, proceed to a flow 11, where the state of a door SW3 is checked. Unless the door is open, return to the flow 9, and if it is determined that the door is open, proceed to a flow 12. When the heating time exceeds the timer time T1, proceed to the flow 10, while in the case of not exceeding the timer time T1, proceed to a flow 13 to confirm the state of the door SW3. Unless the door is closed, return to the flow 12. If the door is closed, proceed to a flow 14. The timer is then reset to return to the flow 9, and operation is continued. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heater control device configured to extend a timer time when cooling to a heating target is detected when heating is performed by a heater heating device including a timer that automatically turns off at a predetermined time. is there.

  Conventionally, this type of heater control device can prevent continuous energization by providing a forgetting to cut timer, and has improved safety (for example, see Patent Document 1).

  FIG. 7 shows a conventional heater control device described in Patent Document 1, and is an example of controlling a heat storage hot air heater. As illustrated in FIG. 7, the heater 21, the heat storage unit 22, the forgetting to cut timer 23, the forgetting to cut switch 24, the heat storage switch 25, and the fan motor switch 26 are configured.

If the heat storage switch 25 is turned on, the heater 21 is energized and the heat storage section 22 stores heat. When the fan motor switch 26 is turned on after a predetermined time of heat storage, the heat of the heater 21 is added to the stored heat, and a large amount of heat can be generated without consuming a large current. However, there was a limit because it relied on the power supply of the household outlet, but this method can extract more heat, so for example, the temperature of the heat is comparable to that of a heater that uses gas or oil as fuel. Wind can be sent out, and there is no combustion part, so there is no exhaust gas, and a safe and clean heating appliance can be provided. Since the heat storage hot air heater is a method of storing heat for a while in principle, there is a concern that it may be left in a heat storage state and forgetting to turn off the heat storage switch 25. For this reason, the forgetting to cut off timer 23 is provided, and when the heat is stored for a predetermined time or longer, the heater 21 is turned off by the forgetting to cut off switch 24, thereby preventing continuous energization for a long time and improving safety.
JP-A-8-303867

  However, in the above-described conventional configuration, the time of the forgetting-off timer 23 is fixed and the conditions of the ambient temperature and the like are not taken into account. Therefore, in some cases, the forgetting-off timer 23 is activated in a state where heat is not sufficiently stored, and the heater There was a possibility of cutting 21 currents.

  For example, even if the room door where the product is used is opened and the room temperature is lowered, and the heat storage temperature due to the heating of the heater 21 is lower than in the case of normal continuous energization, the set time of the forgetting to cut timer 23 has elapsed. If it is forcibly turned off, the heat storage is insufficient when trying to use it again, and sufficient heating performance cannot be exhibited.

  The present invention solves the above-described conventional problems. When a condition occurs in which the portion heated by the heater is cooled, the heater heating time is extended by changing the forgetting to cut timer time, and the temperature rise is insufficient. It is an object of the present invention to provide a heater control device that eliminates the problem and does not impair comfort.

In order to solve the above-described conventional problems, a heater control device according to the present invention includes a heater for heating, a timer that starts timing when the heater starts operating, and whether or not a condition for cooling a portion heated by the heater is generated. And a function of automatically turning off the timer when a predetermined time T1 elapses after the heater starts operating, and when the heater is operating and the detection device is turned on, the timer The heater control device is configured to reset the time count until that time and start the timer again when the detection device is turned off.

  In addition, the heater control device of the present invention includes a timer B that starts timing when a detection device that detects whether or not a condition for cooling the portion heated by the heater has started detection ON, and the timer is operated when the heater is operating. Only when the time B becomes equal to or greater than the predetermined time T2, the time count until the timer is reset, and the timer is not reset when the time is equal to or less than T2. When there is no influence, the timer time is not changed, so that it is possible to prevent overheating due to inadvertently extending the timer time.

  Further, the heater control device according to the present invention is configured so that when the total energization time of the heater exceeds the initial timer time T1 and exceeds the predetermined time T3, the heater is turned off even within the timer time. Even when the heater energization time is extended because the target has been cooled for a long time, it is safe so that it will not become a state of continuous ON by setting a limit so that it will not be energized for an extremely long time. Considering sex.

  In addition, the heater control device of the present invention is configured to turn off the heater for heating when the time of the timer B exceeds a predetermined time T4. By determining that it is difficult and stopping the heater heating, a heater control device that is safer is provided by stopping the heater heating when the product is used under abnormal conditions or unexpected conditions.

  As a result, when the heating unit is cooled unexpectedly and is not sufficiently heated, the timer time is extended so that the heater is turned off unconditionally if the first set timer time is reached. It is possible to avoid the problem of not being heated to a predetermined temperature.

  Since the timer control device of the present invention is configured to extend the time of the automatic OFF timer when the heating target is cooled during operation, it is possible to make the temperature higher than a predetermined temperature by preventing insufficient heating. It is possible to provide a heater control device that is comfortable and comfortable.

  The first invention is a heater for heating, a timer that starts timing when the heater starts operation, a detection device that detects whether or not a condition for cooling a portion heated by the heater is generated, and the heater starts operating. And a function of automatically turning off when the time of the timer passes a predetermined time T1, and resetting the time count of the timer when the heater is operating and when the detection device is turned on, By setting the timer to start counting again when the detection is turned off, the timer time can be extended when the object to be heated is cooled during the heating of the heater, thus preventing insufficient heating. I can do it.

  The second aspect of the invention relates to a timer B that starts timing when the detection device of the first aspect of the invention starts detection ON, and a function that automatically turns off when the time of the timer elapses after the heater starts operating. When the heater is in operation and the timer B is equal to or longer than a predetermined time T2, the time count up to that time of the timer is reset, and the time measurement is started again when the detection device is turned off. As a result, when the detection by the detection device is only for a short time, the timer time T1 is not extended because it is hardly cooled, so that the timer time T1 becomes longer than necessary to prevent waste of electricity due to overheating. I can do it.

  In the third aspect of the invention, in particular, when the detection device of the first or second aspect of the invention is turned ON, the timer is not reset, and the time until the heater for heating is automatically turned OFF is the timer time T1 and the timer B. By setting the time equal to the sum of the time T2 to extend the timer time T1 in which the object to be heated is cooled, the heating is extended only by the cooled time, so the heating time is set to the minimum necessary time. I can do it.

  In the fourth invention, in particular, the detection device according to any one of the first to third inventions is turned ON at least once, and the total energization time of the heater for heating exceeds the initial timer time T1, When the predetermined time T3 is exceeded, the heater is turned off even within the timer time, so that it is possible to stop the extension of the timer time, so that it is possible to prevent heating more than necessary. I can do it.

  In the fifth aspect of the invention, in particular, when the time of the timer B of any one of the first to fourth aspects of the invention exceeds a predetermined time T4, the heating heater is turned off, thereby cooling for a long time. In such a case, since it is determined that there is some abnormality and the heater heating is stopped, a safer heater control device can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 is a circuit block diagram of a heater control device according to the first embodiment of the present invention.

  The present embodiment is an application example to a temperature control device for a heater for seat heating incorporated in a seat of an automobile.

  In FIG. 1, the heater 1 is controlled by a CPU 2, and the CPU 2 has a built-in timer function. The CPU 2 receives the door SW 3 and the operation switch 4, determines the ON / OFF of the heater 1 based on the information and the built-in timer information, and controls the heater 1 by sending a signal to the FET 6. . The power source 5 supplies power to the CPU 2 and the heater 1.

  The operation and action of the heater control apparatus configured as described above will be described below with reference to the flowchart of FIG.

  First, when the operation switch 4 is turned on in flow 7, the flow proceeds to flow 8 and the CPU 2 outputs a signal to the FET 6 to turn on the heater 1 to start the heating operation, and at the same time, the timer starts counting. Next, when the heating time from the start of operation exceeds the timer time T1 in the flow 9, the process proceeds to the flow 10 and the CPU 2 operates so that the heater 1 is automatically turned off. Check the state of the door SW3 in the flow 11. If the door is not open, return to the flow 9. If it is determined that the door is open, proceed to the flow 12. If the heating time exceeds the timer time T1, proceed to the flow 10. If not, the flow proceeds to flow 13 to check the state of the door SW3. If the door is not closed, the flow returns to flow 12. If the door is closed, the flow proceeds to flow 14 to reset the timer and return to flow 9. continue.

  As described above, in the embodiment of the present invention, once the door is opened in the middle of heating, the timer is restarted from the time when the door is next closed, so that the heating time is reduced even if the seat is cooled by opening the door. Since it is extended, it is possible to prevent a situation where the initial timer time T1 alone does not sufficiently warm up.

(Embodiment 2)
FIG. 3 is a flowchart showing the operation of the heater control apparatus according to the second embodiment of the present invention. The system configuration is the same as in FIG.

  The operation and action will be described below with reference to FIGS.

  First, when the operation switch 4 is turned on in flow 7, the flow proceeds to flow 8 and the CPU 2 outputs a signal to the FET 6 to turn on the heater 1 to start the heating operation, and at the same time, the timer starts counting.

  Next, when the heating time from the start of operation exceeds the timer time T1 in the flow 9, the process proceeds to the flow 10 and the CPU 2 operates so that the heater 1 is automatically turned off.

  In the flow 11, the state of the door SW3 is checked. If the door is not open, the process returns to the flow 9. If it is determined that the door is open, the process proceeds to the flow 15.

  In flow 15, after resetting the timer B, the timer B starts counting. Next, the flow proceeds to the flow 12, and when the heating time exceeds the timer time T1, the flow proceeds to the flow 10, and when the heating time does not exceed, the flow proceeds to the flow 13.

  In the flow 13, the state of the door SW3 is confirmed. If the door is not closed, the process returns to the flow 12. If the door is closed, the process proceeds to the flow 16.

  In the flow 16, if the timer B time does not exceed T2, the process returns to the flow 9. If it exceeds, the process proceeds to the flow 17 to reset the timer, and then returns to the flow 9 to continue the operation.

  As described above, in the embodiment of the present invention, when the door is opened for a short time (less than T2) in the middle of heating, it is determined that the door is hardly cooled and the timer time T1 is not extended. It is possible to prevent the time T1 from becoming longer than necessary and reaching a temperature higher than planned, or to prevent waste of electricity.

(Embodiment 3)
FIG. 4 is a flowchart showing the operation of the heater control apparatus according to the third embodiment of the present invention. The system configuration is the same as that shown in FIGS.

  Hereinafter, the operation and action will be described with reference to FIGS.

First, when the operation switch 4 is turned on in flow 7, the flow proceeds to flow 8 and the CPU 2 outputs a signal to the FET 6 to turn on the heater 1 to start the heating operation, and at the same time, the timer starts counting. Next, when the heating time from the start of operation exceeds the timer time T1 in the flow 9, the process proceeds to the flow 10 and the CPU 2 operates so that the heater 1 is automatically turned off. In the flow 11, the state of the door SW3 is checked. If the door is not open, the flow returns to the flow 9. If it is determined that the door is open, the flow proceeds to the flow 15 and the timer B starts counting. Next, the flow proceeds to the flow 12, and when the heating time exceeds the timer time T1, the flow proceeds to the flow 10, and when the heating time does not exceed, the flow proceeds to the flow 13. Check the state of the door SW3 in the flow 13. If the door is not closed, the flow returns to the flow 12. If the door is closed, the flow proceeds to the flow 16. The timer B stops counting, and the timer time is set to the original timer time T1. The time (T1 + T2) obtained by adding the time T2 counted in B is set as a new timer time, and the flow returns to the flow 9 to continue the operation.

  As described above, in the embodiment of the present invention, when the door is opened in the middle of heating, the timer time T1 is increased by the time T2 during which the door is opened. Since the heating time is optimized for the extended time, it is possible to prevent the state where the initial timer time T1 alone is not sufficient to prevent the state from being heated sufficiently.

(Embodiment 4)
FIG. 5 is a flowchart showing the operation of the heater control apparatus according to the fourth embodiment of the present invention. The system configuration is the same as that shown in FIGS.

  The operation and action will be described below with reference to FIGS.

  In this configuration, the case where the fourth embodiment of the present invention is applied to the third embodiment of the present invention has been described, but the same applies to the case of the first or second embodiment of the present invention.

  First, when the operation switch 4 is turned on in the flow 7, the process proceeds to the flow 8 and the CPU 2 outputs a signal to the FET 6 to turn on the heater 1 to start the heating operation, and at the same time, the timer and the timer C start counting. Next, when the heating time from the start of operation exceeds the timer time T1 in the flow 9, the process proceeds to the flow 10 and the CPU 2 operates so that the heater 1 is automatically turned off, and when it does not exceed, the process proceeds to the flow 18. In the flow 18, if the heating time from the start of operation exceeds T3 by the timer 3 independent of the timer, the process proceeds to the flow 10 and the heater 1 is turned off, and if not, the process proceeds to the flow 11.

  In the flow 11, the state of the door SW3 is checked. If the door is not open, the flow returns to the flow 9. If it is determined that the door is open, the flow proceeds to the flow 15 and the timer B starts counting. Next, the flow proceeds to the flow 12, and if the heating time exceeds the timer time T1, the flow proceeds to the flow 10, and if not, the flow proceeds to the flow 19. In flow 11, if the heating time from the start of operation exceeds T3 by the timer 3 independent of the timer, the process proceeds to flow 10 and the heater 1 is turned off. If not, the process proceeds to flow 13.

  Check the state of the door SW3 in the flow 13. If the door is not closed, the flow returns to the flow 12. If the door is closed, the flow proceeds to the flow 16. The timer B stops counting, and the timer time is set to the original timer time T1. The time (T1 + T2) obtained by adding the time T2 counted in B is set as a new timer time, and the flow returns to the flow 9 to continue the operation.

  As described above, in the embodiment of the present invention, when the door is opened during heating, the timer time T1 is increased by the time T2 during which the door is opened. Further, since the heater 1 is turned off, it is possible to stop the extension of the timer time, so that it is possible to prevent heating more than necessary.

(Embodiment 5)
FIG. 4 is a flowchart showing the operation of the heater control apparatus according to the fifth embodiment of the present invention. The system configuration is the same as that shown in FIGS.

  The operation and action will be described below with reference to FIGS.

First, when the operation switch 4 is turned on in flow 7, the flow proceeds to flow 8 and the CPU 2 outputs a signal to the FET 6 to turn on the heater 1 to start the heating operation, and at the same time, the timer starts counting. Next, when the heating time from the start of operation exceeds the timer time T1 in the flow 9, the process proceeds to the flow 10 and the CPU 2 operates so that the heater 1 is automatically turned off. In the flow 11, the state of the door SW3 is checked. If the door is not open, the flow returns to the flow 9. If it is determined that the door is open, the flow proceeds to the flow 15, the timer B is reset, and the timer B starts counting. Next, the flow proceeds to the flow 12, and when the heating time exceeds the timer time T1, the flow proceeds to the flow 10, and when the heating time does not exceed, the flow proceeds to the flow 13. In the flow 13, the state of the door SW3 is confirmed. If the door is not closed, the process returns to the flow 12. If the door is closed, the process proceeds to the flow 16. In flow 16, if the count time of timer B does not exceed T2, the process returns to flow 9, and if it exceeds, the process proceeds to flow 20. In the flow 20, if the timer B time exceeds T4, the process forcibly proceeds to the flow 10 to turn off the heater 1. If not exceeded, the timer is reset in flow 17, and then the flow returns to flow 9 to continue the operation.

  As described above, in the embodiment of the present invention, when the door is opened in the middle of heating, if the time during which the door has been opened is T2 or more, the timer time is reset again when the door is closed again. Start, but if the door opening time is T4 or more, the heater 1 is forcibly turned off. Therefore, if the door is opened and cooled for a long time, it is judged that something is wrong and the heater heating is stopped. Therefore, a safer heater control device can be provided.

  As described above, the heater control device according to the present invention is configured to extend the time of the automatic OFF timer when the object to be heated is cooled during the heater heating operation, so that heating due to being cooled during heating is performed. Since the shortage can be prevented and the temperature can be raised to a predetermined temperature or higher, heating at a more appropriate temperature is possible, and a user-friendly and comfortable heater control device can be provided.

Circuit block diagram of heater control apparatus according to first to fifth embodiments of the present invention Operation flow chart of heater control apparatus according to Embodiment 1 of the present invention Flowchart of operation of heater control apparatus in Embodiment 2 of the present invention Operation flowchart of heater control apparatus according to Embodiment 3 of the present invention Flowchart of operation of heater control apparatus in Embodiment 4 of the present invention Flowchart of operation of heater control apparatus in Embodiment 5 of the present invention Circuit block diagram of conventional heater control device

Explanation of symbols

1 Heater 2 CPU (Built-in timer)
3 Door SW (detection device)

Claims (5)

A heater for heating, a timer that starts timing at the start of operation of the heater, a detection device that detects whether or not a condition for cooling a portion heated by the heater is generated, and a time of the timer after the heater starts operating A function that automatically turns off when a predetermined time T1 elapses. When the detection device is turned ON when the heater is operating, the time count until the timer is reset, and when the detection device is turned OFF. A heater control device in which the timer starts counting again. A heater for heating, a timer that starts timing when the heater starts operation, a detection device that detects whether or not a condition for cooling a portion heated by the heater is generated, and a time when the detection device starts detection ON A timer B for starting, and a function of automatically turning off when the timer time has elapsed after a predetermined time T1 after the heater starts operating, and when the heater is operating, the timer B is equal to or longer than the predetermined time T2. In this case, the heater control device is configured to reset the time count up to that time of the timer and to start timing again when the detection device is turned off. The time until the heater is automatically turned off when the detection device detects ON is set to a time equal to the sum of the timer time T1 and the time T2 of the timer B. The heater control apparatus described. A timer C that starts timing at the start of heater operation is provided independently of the timer, and the detection device detects at least once, and the total energization time of the heater for heating measured by the timer C is the initial timer time T1. The heater control device according to any one of claims 1 to 3, wherein when the predetermined time T3 is exceeded, the heater is turned off even within the timer time. The heater control device according to any one of claims 1 to 4, wherein the heater is turned off when the time of the timer B exceeds a predetermined time T4.

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