JP2008018871A - Vehicular glass antifreezer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular glass antifreezer capable of preventing windshield glass from being frozen when a vehicle is parked, and suppressing the drop of the temperature in a cabin. <P>SOLUTION: The vehicular glass antifreezer comprises an electromagnetic three-way valve 12 for changing over a flow passage of a cooling medium fed from an engine 8, a tank 13 having the heat insulation function for storing the cooling medium, an electromagnetic opening and closing valve 14 provided on an outlet side of the tank 13, a pump 15 for pumping out the cooling medium, a heating element 16 provided on an upper portion of an instrument panel in a cabin, an electromagnetic three-way valve 17 for changing over a flow passage of the cooling medium to be fed from the heating element 16, and a heating passage 18 for leading the cooling medium to be fed via the electromagnetic three-way valve 17 to the tank 13. The relatively high-temperature cooling medium is stored and heat-insulated in the tank 13 when a vehicle is parked, and when the temperature in the cabin is dropped, the cooling medium is circulated via the heating passage 18 to generate the heat by the heating element 16, and a windshield glass and the inside of the cabin are heated by the radiation heat. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle glass freeze prevention device for preventing a windshield from freezing.

  2. Description of the Related Art Conventionally, there has been proposed a vehicle heat insulating cover that is formed of a bag-like heat insulating reflective sheet and covers a vehicle windshield from the outside.

In this prior art, when the vehicle is parked in winter when the outside air temperature is low, the windshield of the vehicle is covered from the outside with a heat insulating cover, so that the windshield can be prevented from frosting and freezing.
JP 2000-158953 A

  However, in the technique described in Patent Document 1, it is necessary to attach the heat insulating cover to the outside of the windshield of the vehicle when parking, and it is necessary to remove the heat insulating cover when the occupant gets into the passenger compartment. There is a problem that it takes a lot of time and effort to remove and install the heat insulating cover.

  Accordingly, an object of the present invention is to provide a novel glass anti-freezing device for a vehicle that can prevent the windshield from freezing during parking and can suppress a temperature drop in the passenger compartment.

  In the invention of claim 1, the heating element (16) is provided on the upper surface of the instrument panel (5) in the passenger compartment (2), and the windshield (4) in the front part of the passenger compartment (2) is heated. It is characterized by heating with radiant heat from the body (16).

  The invention according to claim 2 is characterized in that the heating element (16) generates heat using a cooling medium for the vehicle drive device (8).

  The invention of claim 3 is characterized in that the cooling medium is circulated through a path (18) different from the path (9) for cooling the vehicle drive device (8).

  The invention of claim 4 is characterized by comprising a tank (13) having a heat retaining function and storing the cooling medium.

  According to the invention of claim 1, when the heating element provided on the upper surface of the instrument panel in the passenger compartment is heated during parking in winter when the outside air temperature is low, the windshield at the front part of the passenger compartment is caused by the radiant heat from the heating element. Since it is heated, it is possible to prevent the windshield from freezing during parking without requiring the trouble of removing and attaching the heat insulating cover as in the prior art. In addition, since the vehicle interior is warmed by the radiant heat from the heating element, the temperature decrease in the vehicle interior can be suppressed during parking in winter when the outside air temperature is low, and the comfort in the vehicle interior can be improved.

  According to the second aspect of the present invention, since the heating element generates heat using the cooling medium for the vehicle driving device, a heat source of the heating element for heating the windshield provided in the vehicle can be easily obtained. .

  According to the third aspect of the present invention, the cooling medium is circulated through a route different from the route for cooling the vehicle drive device, so that the heating element can generate heat while the vehicle drive device is stopped.

  According to the invention of claim 4, a relatively high temperature cooling medium is stored and kept warm by the tank during parking, and when the temperature in the passenger compartment decreases, the cooling medium is circulated to generate heat from the heating element. Since the windshield is heated by this, it is possible to effectively prevent the windshield from freezing.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a glass freeze prevention device for a vehicle according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a mounting position of a heating element provided in the vehicle glass freeze prevention device of FIG. 3 is a flowchart showing a processing procedure when the windshield freeze prevention is performed by the vehicle glass freeze prevention apparatus of FIG.

  As shown in FIG. 2, a vehicle 1 is formed with a vehicle compartment 2 and an engine compartment 3, and a windshield 4 and an instrument panel 5 are provided at the front of the vehicle compartment 2. A steering wheel 7 operated by a passenger sitting in the position 6 is provided. Further, the engine chamber 3 is provided with an engine 8 shown in FIG. 1, a cooling path 9 through which a cooling medium for cooling the engine 8 circulates, and a radiator for dissipating the cooling medium provided in the middle of the cooling path 9. 10 are stored.

  And the glass freeze prevention apparatus 11 of this embodiment is interposed in the middle of the cooling path | route 9, the electromagnetic three-way valve 12 which switches the flow path of the cooling medium sent from the engine 8, and a three-way electromagnetic having a heat retention function A tank 13 for storing a cooling medium sent via the valve 12, an electromagnetic on-off valve 14 provided on the outlet side of the tank 13, a pump 15 connected to the electromagnetic on-off valve 14 for sending out the cooling medium, and an instrument panel 5 A heating element 16 provided in the upper part and positioned immediately below the windshield 4, another electromagnetic three-way valve 17 for switching the flow path of the cooling medium sent from the heating element 16, and a cooling medium sent via the electromagnetic three-way valve 17 And a controller 19 for controlling the operations of the electromagnetic three-way valves 12 and 17, the electromagnetic on-off valve 14, and the pump 15.

  The heating element 16 is formed from, for example, an LLC pack in which a resin sheet is formed in a bag shape, and is attached to the back surface of the upper portion of the instrument panel 5 as shown in FIG. In this heat generating body 16, it heat-generates by performing heat exchange of the cooling medium sent from the pump 15, and the windshield 4 located just above is heated with the radiant heat.

  The control unit 19 incorporates a timer 20 that measures time, a temperature sensor 21 provided at a predetermined location in the passenger compartment 2, for example, the upper surface of the instrument panel 5, and a door lock detection sensor 22 that detects a door lock of the vehicle 1. And an anti-freezing switch 23 that is manually operated by the occupant.

  In the present embodiment, the windshield 4 is prevented from freezing according to the processing procedure shown in FIG. That is, first, when the engine 8 is operated as step S1, as shown by arrow A1 in FIG. 1, the cooling medium is circulated through the cooling path 9 and the radiator 10 radiates heat as step S2. Then, the engine 8 is cooled with a cooling medium.

  When the engine 8 is stopped in step S1, the occupant turns on the freeze prevention switch 23 in step S3. In step S4, the control command is sent from the control unit 19 to the electromagnetic three-way valve 12, the electromagnetic on-off valve 14, the pump 15, and the electromagnetic three-way. Output to valve 17. As a result, the storage path 24 including the engine 8, the electromagnetic three-way valve 12, the tank 13, the electromagnetic on-off valve 14, the pump 15, the heating element 16, and the electromagnetic three-way valve 17 is formed, and the pump 15 is operated. 1, the cooling medium circulates through the storage path 24, and the cooling medium accumulated in the tank 13 passes through the electromagnetic on-off valve 14, the pump 15, the heating element 16, and the electromagnetic three-way valve 17. 8 and a relatively high temperature coolant is sent from the engine 8 to the tank 13 via the electromagnetic three-way valve 12.

  Next, when the control command is output again from the control unit 19 in step S5, the electromagnetic three-way valve 12, the electromagnetic on-off valve 14, and the electromagnetic three-way valve 12 are closed and the pump 15 is stopped. Is stopped and a relatively high temperature cooling medium is stored in the tank 13, so that the temperature of the cooling medium is maintained in the tank 13.

  Next, when the door of the vehicle 1 is locked with an electronic key (not shown) in step S6, a door lock detection signal is output from the door lock detection sensor 22, and then input from the temperature sensor 21 by the control unit 19 in step S7. Based on the detected temperature detection signal, it is determined whether or not the temperature of the upper surface of the instrument panel 5 is equal to or lower than a predetermined temperature (for example, 0 ° C. causing condensation), and the temperature of the upper surface of the instrument panel 5 is equal to or lower than the predetermined temperature. In step S8, the timer 20 starts measuring time and outputs a control command from the control unit 19 to the electromagnetic on-off valve 14, the pump 15, and the electromagnetic three-way valve 17. As a result, the heat generation path 18 including the tank 13, the electromagnetic on-off valve 14, the pump 15, the heating element 16, and the electromagnetic three-way valve 17 is formed and the pump 15 is operated. As shown by the arrow A3 in FIG. The cooling medium circulates through the heat generation path 18, and the relatively high temperature cooling medium accumulated in the tank 13 is sent to the heating element 16 through the electromagnetic on-off valve 14 and the pump 15. As a result, the heating element 16 generates heat by performing heat exchange of the cooling medium as step S9 and heats the windshield 4 with radiant heat, and when the time measured by the timer 20 passes a predetermined time (for example, 1 minute) as step S10. In step S11, the electromagnetic on-off valve 14 and the electromagnetic three-way valve 17 are closed and the pump 15 is stopped. Therefore, the circulation of the cooling medium through the heat generation path 18 is stopped, thereby completing the series of anti-freezing processing of the windshield 4. To do.

  On the other hand, the passenger locks the door of the vehicle 1 with an electronic key (not shown) and outputs a door lock detection signal from the door lock detection sensor 22 in step S12 without turning on the freeze prevention switch 23 in step S3. In such a case, the anti-freezing process in steps S4 to S11 is omitted and the process ends.

  In the present embodiment described above, a relatively high-temperature cooling medium is stored and kept warm by the tank 13 at the time of parking, and then the cooling medium is changed when the temperature in the passenger compartment 2 is lowered to a temperature causing condensation. Since the windshield 4 is heated by the radiant heat from the heat generating element 16 by circulating the air and the heat generating element 16 generates heat, it is not necessary to remove the heat insulating cover as in the prior art. 4 can be prevented from freezing, and the vehicle interior is warmed by the radiant heat from the heating element 16, so that the temperature drop in the vehicle interior 2 can be suppressed, and the comfort in the vehicle interior 2 can be improved. . Moreover, in the said embodiment, since the heat generating body 16 generates heat using the cooling medium of the engine 8, the heat source of the heat generating body 16 that warms the windshield 4 can be easily obtained, and the engine 8 is stopped during parking. In this state, the heating medium 16 can be heated by circulating the cooling medium via the heat generation path 18 different from the cooling path 9 of the engine 8.

  For example, the applicant parks the vehicle 1 from 0:00 am to 6:00 am under the condition of an outside air temperature of 0 ° C. to below 10 ° C., and performs an anti-freezing experiment on the windshield 4 with the glass anti-freezing device 11. As a result, the upper part of the windshield 4 was frozen, but more than 2/3 of the whole (intermediate part and lower part) did not freeze, and the visibility of the windshield 4 was almost good. 11, it was confirmed that the windshield 4 can be prevented from freezing during parking. On the other hand, when the above-mentioned freezing prevention was not performed, the entire windshield 4 was frozen, and the visibility of the windshield 4 was poor.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, in the above embodiment, the case where the heating element 16 is provided on the back surface of the upper portion of the instrument panel 5 is illustrated, but the heating element 16 can be provided so as to be exposed from the upper surface of the instrument panel 5, and As the body 16, instead of the LLC pack in which the resin sheet is formed in a bag shape, another heating element, for example, a heating wire, may be provided to generate heat. Furthermore, although the case where the temperature sensor 21 was provided in the instrument panel 5 upper surface was illustrated, it is not limited to this, The temperature sensor 21 can be provided in the windshield 4 or the other predetermined location in the vehicle interior 2. Furthermore, although the case where the engine 8 was provided in the vehicle 1 was illustrated in the said embodiment, it is not limited to this, The other vehicle drive device is provided in a vehicle, The heat_generation | fever of a heat generating body is generated using the cooling medium. The same effect can be obtained when it is performed.

1 is a block diagram showing a glass freeze prevention device for a vehicle according to an embodiment of the present invention. Sectional drawing which shows the attachment position of the heat generating body provided in the glass freezing prevention apparatus for vehicles of FIG. The flowchart which shows the process sequence at the time of performing windshield freeze prevention with the glass freeze prevention apparatus for vehicles of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Cabin 4 Windshield 5 Instrument panel 8 Engine (vehicle drive device)
9 Cooling path (path)
DESCRIPTION OF SYMBOLS 10 Radiator 11 Glass freezing prevention apparatus 12 Electromagnetic three-way valve 13 Tank 14 Electromagnetic on-off valve 15 Pump 16 Heating element 17 Electromagnetic three-way valve 18 Heat generation path (other paths)
DESCRIPTION OF SYMBOLS 19 Control part 20 Timer 21 Temperature sensor 22 Door lock detection sensor 23 Freezing prevention switch 24 Storage path

Claims (4)

  A heating element (16) is provided on the upper surface of the instrument panel (5) in the passenger compartment (2), and the windshield (4) in front of the passenger compartment (2) is heated by radiant heat from the heating element (16). An anti-freezing device for glass for vehicles.   The glass freeze prevention device for a vehicle according to claim 1, wherein the heating element (16) generates heat using a cooling medium for the vehicle drive device (8).   The glass freeze prevention device for a vehicle according to claim 2, wherein the cooling medium is circulated through a route (18) different from the route (9) for cooling the vehicle drive device (8). The glass freezing prevention apparatus for vehicles according to claim 2 provided with the tank (13) which has a heat retention function and stores said cooling medium.

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