JP6439471B2 - Anti-fogging deicing device for vehicles - Google Patents

Description

  The present invention relates to an anti-fogging deicing device for a vehicle capable of performing anti-fogging of an inner surface of a windshield of a vehicle and deicing of an outer surface.

  2. Description of the Related Art Conventionally, there is an anti-fogging deicing apparatus that warms a windshield for the purpose of securing a field of view through the windshield (see, for example, Patent Document 1 below). An anti-fogging deicer, sometimes called a defroster, warms the windshield and melts the ice on the outer surface of the windshield or removes the fog on the inner surface of the windshield to ensure visibility through the windshield. .

JP-A-8-99609

  However, in the conventional apparatus described above, when the apparatus is operated to eliminate poor visibility, the windshield is heated so that both the anti-fogging of the inner surface of the windshield and the defrosting of the outer surface of the windshield can be performed. To do. In other words, the entire windshield is heated so that the temperature on both sides of the windshield rises in order to ensure visibility regardless of whether the cause of poor visibility is ice on the outer surface of the windshield or water droplets on the inner surface. . Accordingly, even when the cause of poor visibility is only on one side of the windshield, the temperature of both sides of the windshield is raised, so there is a problem that energy consumption is relatively large.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a vehicle anti-fogging and deicing device capable of reducing energy consumption required to ensure visibility through a windshield.

In order to achieve the above object, one of the disclosed techniques includes:
The windshield (10) of the vehicle (2);
A first heat generating part (21) provided on the windshield and generating heat when energized;
A second heat generating part (22) provided in the windshield, disposed in a portion closer to the vehicle interior (3) than the first heat generating part in the thickness direction of the windshield, and generates heat by energization;
A heat insulating part (23) provided on the windshield and disposed between the first heat generating part and the second heat generating part in the thickness direction of the windshield;
The switching between the energized state and the non-energized state of the first heat generating unit and the switching between the energized state and the non-energized state of the second heat generating unit are performed individually for the first heat generating unit and the second heat generating unit. Switching means (50) that can be performed;
A cancellation request switch means (30) provided in the vehicle and operated when it is necessary to eliminate the poor visibility through the windshield, and is set to an ON state, which is a request for eliminating the poor visibility,
Fogging detecting means (40) for detecting the presence or absence of fogging of the inner surface (10b) which is the indoor side surface of the windshield,
The switching means is a control means for performing switching control between the energized state and the non-energized state of the first heat generating portion and the second heat generating portion in accordance with the detection result of the fogging detecting means when the cancellation request switch means is in the on state. And
The control means
When the cancellation request switch means is on,
When the clouding detection means detects clouding of the inner surface, the second heat generating part is set to the energized state,
When the fogging detection means does not detect the fogging of the inner surface, the first heat generating part is set to the energized state and the second heat generating part is set to the non-energized state .
Another one of the disclosed techniques is
An outside air temperature detecting means (41) for detecting an outside air temperature which is an air temperature outside the vehicle;
Vehicle speed detection means (42) for detecting the speed of the vehicle;
An elapsed time detecting means (44) for detecting an elapsed time after boarding an occupant in a vehicle interior;
When the cancellation request switch means is in the ON state, the switching means determines whether the first heat generating portion and the second heat generating portion are in the non-conductive state according to the detection results of the outside air temperature detecting means, the vehicle speed detecting means, and the elapsed time detecting means. A control means for performing switching control with the energized state,
The control means
When the cancellation request switch means is on,
When the outside air temperature detected by the outside air temperature detecting means is 0 ° C. or less, the vehicle speed detected by the vehicle speed detecting means is 0, and the elapsed time detected by the elapsed time detecting means is less than a predetermined time, While setting 1 heat-generating part to an energized state, setting the 2nd heat-generating part to a non-energized state,
When the outside air temperature detected by the outside air temperature detecting means is higher than 0 ° C., the vehicle speed detected by the vehicle speed detecting means is larger than 0, or the elapsed time detected by the elapsed time detecting means is longer than a predetermined time. The second heat generating part is set in an energized state.
Another one of the disclosed techniques is
A remote output means (31) capable of outputting a command for eliminating the poor visibility through the windshield from outside the vehicle;
Occupant detection means (44) for detecting an occupant boarded in a vehicle interior,
The switching means sets a canceling operation mode for canceling a visual field defect through the windshield based on the canceling command output by the remote output means, and also displays the detection result of the occupant detecting means when the canceling operation mode is set. Accordingly, the control means for performing switching control between the energized state and the non-energized state of the first heat generating unit and the second heat generating unit,
The control means
When the cancel operation mode is set,
When the occupant detection means does not detect an occupant on board, the first heat generating portion is set in an energized state and the second heat generating portion is set in a non-energized state.

  According to this, when there is icing on the outer surface of the windshield opposite the indoor side, the switching means energizes the first heat generating portion to generate heat from the first heat generating portion, and heats the outer surface of the windshield. Can do. Thereby, the ice on the outer surface of the windshield can be melted. Moreover, the heat insulation part is provided in the site | part which becomes indoor side rather than a 1st heat generating part among windshields. Therefore, the heat generated from the first heat generating portion is prevented from being transmitted to the vehicle cabin side and radiated into the cabin. In this way, it is possible to reduce energy consumption when defrosting the outer surface of the windshield to ensure visibility through the windshield.

  On the other hand, when the inner surface of the windshield on the indoor side is cloudy, the switching means can energize the second heat generating portion to generate heat from the second heat generating portion, thereby heating the inner surface of the windshield. Thereby, the fogging of the inner surface of the windshield can be eliminated. Moreover, the heat insulation part is provided in the site | part which becomes a vehicle outdoor side rather than a 2nd heat generating part among windshields. Therefore, the heat generated from the second heat generating portion is prevented from being transmitted to the outside of the vehicle compartment and radiated to the outside of the compartment. In this way, it is possible to reduce the energy consumed when clearing the inner surface of the windshield to ensure visibility through the windshield.

  As described above, when the cause of poor visibility is ice on the outer surface of the windshield, the temperature of the outer surface of the windshield is increased and the temperature increase of the inner surface is suppressed at the first heat generating portion. Further, when the cause of poor visibility is water droplets on the inner surface of the windshield, the second heat generating portion raises the temperature of the inner surface of the windshield and suppresses the temperature rise of the outer surface. Thereby, the energy consumption required for ensuring the field of view through the windshield can be reduced.

  In addition, the code | symbol in the parenthesis attached | subjected to each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a schematic configuration of a vehicle antifogging and deicing device according to a first embodiment to which the present invention is applied. It is a schematic diagram explaining the arrangement | positioning position of the heater and fogging sensor of 1st Embodiment. It is an expanded sectional view of the III section of FIG. It is an expanded sectional view of the IV section of FIG. It is a flowchart explaining the visual field ensuring control operation | movement which the control part of 1st Embodiment performs. It is a graph explaining the energy-saving effect of the anti-fogging deicing device for vehicles of 1st Embodiment. It is a block diagram which shows schematic structure of the anti-fogging deicing apparatus for vehicles of 2nd Embodiment. It is a part of flowchart explaining the visibility ensuring control operation | movement which the control part of 2nd Embodiment performs. It is a block diagram which shows schematic structure of the anti-fog defrosting apparatus for vehicles of 3rd Embodiment. It is a flowchart explaining the visual field ensuring control operation | movement which the control part of 3rd Embodiment performs. It is a block diagram which shows schematic structure of the anti-fog defrosting apparatus for vehicles of 4th Embodiment. It is a flowchart explaining the visual field ensuring control operation | movement which the control part of 4th Embodiment performs. It is a block diagram which shows schematic structure of the anti-fogging deicing apparatus for vehicles of other embodiment. It is sectional drawing which shows a part of windshield of other embodiment.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. In the case where only a part of the configuration is described in each embodiment, the other parts of the configuration are the same as those described previously. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination is not particularly troublesome.

(First embodiment)
A first embodiment to which the present invention is applied will be described with reference to FIGS.

  As shown in FIG. 1, a defroster device 1 that is an antifogging and defrosting device for a vehicle according to this embodiment includes a sheet heater 20, a DEF switch 30, a fogging sensor 40, and a control unit 50. As shown in FIGS. 2 and 3, the defroster device 1 includes a windshield 10 having a sheet heater 20. The windshield 10 is a so-called window glass that divides the interior 3 and the exterior 4 of the vehicle 2 and is provided so that an occupant riding in the interior 3 can visually recognize the scenery of the exterior 4 and the like. The windshield 10 of the present embodiment is a front windshield and may be called a windshield. Hereinafter, the windshield 10 may be simply referred to as the shield 10.

  The defroster device 1 of the present embodiment is not only defrosted or defrosted on the outer surface 10a which is the surface of the windshield 10 on the outdoor side 4 but also demisted or prevented on the inner surface 10b which is the surface of the windshield 10 on the indoor 3 side. It is a device that also performs fogging. The defroster device 1 is a device that performs not only defrosting but also demisting. In this embodiment, the anti-fogging deicing device for vehicles is called a defroster device.

  As shown in FIG. 4, the sheet heater 20 includes a first heater 21 that is a defrost heater, a second heater 22 that is a demist heater, and a heat insulating layer 23. The sheet heater 20 can also be called a film heater. The sheet heater 20 is a sheet body in which the first heater 21, the heat insulating layer 23, and the second heater 22 overlap each other.

  The sheet-like heater 20 is disposed in a portion of the shield 10 that faces the room 3. The sheet heater 20 occupies the innermost part of the shield 10 on the indoor 3 side. The sheet heater 20 is attached to the surface of the windshield body 11 on the side of the room 3 and extends so as to follow the windshield body 11. The sheet-like heater 20 is fixed to the surface of the windshield body 11 on the side of the room 3 by, for example, adhesion or adhesion. Hereinafter, the windshield body 11 may be simply referred to as a shield body 11. The shield body 11 is made of, for example, transparent glass or transparent resin. The sheet heater 20 is also made of a transparent material.

  The sheet heater 20 according to the present embodiment has a three-layer structure in which a first heater 21 that is a first heat generating part and a second heater 22 that is a second heat generating part sandwich a heat insulating layer 23 that is a heat insulating part. ing. The first heater 21 is a film heater that constitutes a portion of the sheet heater 20 that is closest to the shield body 11. The first heater 21 extends along the shield body 11 while being in contact with the shield body 11.

  The second heater 22 is a film heater that constitutes a portion of the sheet-like heater 20 that is closest to the shield body 11. The second heater 22 is disposed at a position facing the room 3 and extends in the direction in which the shield body 11 extends. The surface on the indoor 3 side of the second heater 22 is the inner surface 10 b of the shield 10.

  The first heater 21 has a transparent conductive film, for example. The first heater 21 is formed, for example, by depositing a transparent conductive film at a high temperature on a substrate surface made of glass or a resin film. At both ends in the spreading direction of the transparent conductive film, for example, electrodes made of silver paste are provided. The transparent conductive film generates heat by applying a voltage between the electrodes and energizing the transparent conductive film. The 1st heater 21 may cover the structure which consists of a transparent conductive film and an electrode with a glass cover etc. from the other side of a board | substrate.

  The transparent conductive film of the first heater 21 can be formed including, for example, a so-called rare metal mainly composed of indium oxide. The electrical resistance value of the transparent conductive film varies depending on the blending ratio of the constituent components. For example, the electrical resistance value can be increased by decreasing the silver blending ratio, and the amount of heat generated during voltage application can be decreased. The transparent conductive film can obtain desired heat generation characteristics by adjusting the blending ratio of the constituent components.

  The second heater 22 can have the same configuration as the first heater 21. By making the first heater 21 and the second heater 22 into thin film heaters having the same configuration, the sheet heater 20 can be easily manufactured.

  The heat insulating layer 23 is a heat insulating film layer made of, for example, a transparent material. The heat insulating layer 23 is a heat insulating layer member that extends in the expanding direction of the shield body 11 between the first heater 21 and the second heater 22. The heat insulating layer 23 can be formed of, for example, an airgel having a thickness of 5 mm. The heat insulating layer 23 is preferably formed of a material having a lower thermal conductivity than the shield body 11. It is further preferable that the heat insulation layer 23 has a thermal resistance in the thickness direction of the shield 10 larger than that of the shield main body 11.

  The DEF switch 30 is provided, for example, on an instrument panel disposed in the front part of the room 3 of the vehicle 2. The DEF switch 30 is called, for example, a defroster switch, and is operated by a passenger or the like boarded in the room 3. The DEF switch 30 is one switch device that is operated when the visual field through the shield 10 is deteriorated due to ice adhering to the outer surface 10a of the shield 10 or water droplets adhering to the inner surface 10b. . The DEF switch 30 is provided in the vehicle 2 and is operated when it is necessary to eliminate the poor visibility via the shield 10 and corresponds to a cancellation request switch means that is set to an ON state, which is a visual defect elimination request state. The DEF switch 30 outputs on / off information to the control unit 50.

  The fogging sensor 40 is attached to the inner surface 10b of the shield 10 as shown in FIG. For example, the fogging sensor 40 is fixed to the inner surface 10b of the shield 10 with an adhesive sheet or the like in a region such as a front portion or an upper portion of the rearview mirror so as not to disturb the sight of the passenger. The fog sensor 40 is a fog detection unit that detects the presence or absence of fog on the inner surface 10 b of the shield 10. The cloudiness sensor 40 detects, for example, the temperature of the air in the room 3 near the shield 10, the humidity of the air in the room 3 near the shield 10, and the temperature of the inner surface 10 b of the shield 10. The cloudiness sensor 40 determines whether or not an environment in which water droplets are formed on the inner surface 10b of the shield 10 and fogging occurs based on at least the detection value described above. The fog sensor 40 detects the presence or absence of fog on the inner surface 10b based on at least the above-described detection value.

  For example, the cloudiness sensor 40 obtains the dew point temperature of the air in contact with the shield 10 from the temperature of the air in the room 3 near the shield 10 and the humidity of the air in the room 3 near the shield 10, and determines the dew point temperature and the temperature of the inner surface 10b. The presence or absence of cloudiness is detected by comparing the above. The cloudiness sensor 40 outputs the detected cloudy presence / absence information to the control unit 50.

  The fogging sensor 40 may calculate a window fogging index value that is an index of the ease of fogging of the window from the detection value described above. When the calculated window fogging index value is greater than or equal to a predetermined value, it can be determined that there is window fogging, and when the window fogging index is less than the predetermined value, it can be determined that there is no window fogging. Further, the cloudiness sensor 40 detects the temperature of the air in the room 3, the humidity of the air in the room 3, and the temperature of the inner surface 10b of the shield 10. Based on these detection values, for example, the controller 50 fogs the window. The presence or absence of this may be detected. In this case, the fogging sensor 40 and the control unit 50 correspond to fogging detecting means for detecting the presence or absence of fogging of the inner surface 10b.

  Note that the fog detection means is not limited to the fog sensor 40 or the one including the fog sensor 40. For example, an optical detection device that detects fogging of the inner surface 10b of the shield 10 may be used as the fogging detecting means.

  The control unit 50 shown in FIG. 1 includes a microcomputer including, for example, a CPU, a ROM, and a RAM, and peripheral circuits. The control unit 50 inputs the on / off setting state information of the DEF switch 30 and the window fogging presence / absence information of the fogging sensor 40 and performs energization control on each of the first heater 21 and the second heater 22. The controller 50 switches between the energized state and the non-energized state of the first heater 21. In addition, the control unit 50 switches between the energized state and the non-energized state of the second heater 22. The control unit 50 individually switches the energized state and the non-energized state for the first heater 21 and the second heater 22. The control unit 50 corresponds to switching means. When the DEF switch 30 is in the ON state, the control unit 50 performs control to switch between the energized state and the non-energized state of the first heater 21 and the second heater 22 according to the clouding detection result of the clouding sensor 40. Means.

  Next, the visual field securing control operation performed by the control unit 50 based on the above configuration will be described.

  As shown in FIG. 5, when the control unit 50 performs visibility securing control, it is first determined whether or not the DEF switch 30 is in an on state (step 110). If it is determined in step 110 that the DEF switch 30 is on, sensor information is acquired (step 120). In step 120, information regarding the presence or absence of fogging of the inner surface 10 b of the shield 10 is input from the fogging sensor 40. After step 120 is executed, it is determined whether or not the inner surface 10b is cloudy based on the information acquired in step 120 (step 130).

  If it is determined in step 130 that the inner surface 10b is not cloudy, the first heater 21 is energized and generates heat from the first heater 21 (step 140). At this time, the second heater 22 is in a non-energized state. If the DEF switch 30 is on when the inner surface 10b is not cloudy, it is assumed that the user operating the DEF switch 30 is seeking to melt the ice on the outer surface 10a of the shield 10. The Accordingly, when it is determined in step 130 that the inner surface 10b is not fogged, the first heater 21 is turned on to heat the outer surface 10a. After executing step 140, the process returns to step 110.

  If it is determined in step 130 that the inner surface 10b is cloudy, the second heater 22 is energized to generate heat from the second heater 22 (step 150). If the DEF switch 30 is turned on when the inner surface 10b is cloudy, it is assumed that the user operating the DEF switch 30 is seeking to remove water droplets on the inner surface 10b of the shield 10. The Therefore, when it is determined in step 130 that the inner surface 10b is cloudy, the second heater 22 is turned on to heat the inner surface 10b. After executing step 150, the process returns to step 110.

  The control unit 50 starts the visibility securing control, first executes step 140 to energize the first heater 21, and then executes step 150 to energize the second heater 22. The energized state of the heater 21 can be continued. Initially, when the inner surface 10b is not fogged and step 140 is being performed to defrost the outer surface 10a, the inner surface 10b is detected to be fogged and the process proceeds to step 150 to remove the inner surface 10b. When doing so, the energization state of the first heater 21 is continued. The first heater 21 can be switched from an energized state to a non-energized state when a predetermined time has elapsed since the start of energization.

  The first heater 21 may continue to be energized until the DEF switch 30 is turned off. Note that the first heater 21 may be switched from the energized state to the non-energized state when the second heater 22 is changed from the non-energized state to the energized state by executing Step 150.

  If it is determined in step 110 that the DEF switch 30 is not turned on and is in an off state, both the first heater 21 and the second heater 22 are set in a non-energized state (step 160). In step 160, for example, when only one of the first heater 21 and the second heater 22 is in the energized state, the heater is switched from the energized state to the non-energized state, and the other heater continues in the non-energized state. When step 160 is executed, the process returns to step 110.

  According to the above configuration and operation, the following effects can be obtained.

  The defroster device 1 includes a windshield 10 for the vehicle 2. The defroster device 1 includes a first heater 21 that is provided on the windshield 10 and generates heat when energized, and a second heater 22 that is also provided on the windshield 10 and generates heat when energized. The second heater 22 is disposed at a position closer to the room 3 side of the vehicle 2 than the first heater 21 in the thickness direction of the windshield 10. In addition, the defroster device 1 includes a heat insulating layer 23 provided on the windshield 10 and disposed between the first heater 21 and the second heater 22 in the thickness direction of the windshield 10.

  Further, the defroster device 1 switches the first heater 21 and the second heater 22 between the energized state and the non-energized state of the first heater 21 and the energized state and the non-energized state of the second heater 22. A control unit 50 is provided as switching means that can be performed individually.

  According to this, when there is icing on the outer surface 10a on the inner side of the windshield 10, the controller 50 energizes the first heater 21 to generate heat from the first heater 21, and the outer surface of the windshield 10 10a can be heated. Thereby, the ice of the outer surface 10a of the windshield 10 can be melted. Further, a heat insulating layer 23 is provided in a portion of the windshield 10 that is on the indoor side of the first heater 21. Therefore, the heat generated from the first heater 21 is transmitted to the interior 3 of the vehicle 2 and is prevented from being radiated to the interior 3. In this way, energy consumption when the outer surface 10a of the windshield 10 is deiced to secure a field of view through the windshield 10 can be reduced.

  On the other hand, when the inner surface 10b on the indoor side of the windshield 10 is cloudy, the controller 50 energizes the second heater 22 to generate heat from the second heater 22 and heats the inner surface 10b of the windshield 10. be able to. Thereby, fogging of the inner surface 10b of the windshield 10 can be eliminated. Further, a heat insulating layer 23 is provided in a portion of the windshield 10 that is closer to the outdoor 4 side of the vehicle 2 than the second heater 22. Therefore, the heat generated from the second heater 22 is prevented from being transmitted to the outdoor 4 side of the vehicle 2 and radiated to the outdoor 4. In this way, the energy consumed when the inner surface 10b of the windshield 10 is cleared of cloudiness and the field of view through the windshield 10 is secured can be reduced.

  As shown in FIG. 6, the inventor has shown that the energy consumed when clearing the cloudiness of the inner surface 10 b to ensure the field of view through the windshield 10 can be reduced to 1/10 or less of the comparative example in this example. Has confirmed. Here, the comparative example is a defroster device in which one film heater having no heat insulating layer is provided on the inner surface of the shield body, and the entire shield is heated at the time of demisting or defrosting. In the device of the comparative example, the heat dissipation loss to the outside of the vehicle increases during demisting. In addition, heat loss to the vehicle interior increases during defrosting. According to the present embodiment, it is possible to save energy by suppressing the heat dissipation loss described above. Further, it is possible to shorten the time until the field of view can be secured by performing demisting or defrosting.

  As described above, when the cause of the poor visibility is ice on the outer surface 10a of the windshield 10, the first heater 21 increases the temperature of the outer surface 10a and suppresses the temperature increase of the inner surface 10b. . When the cause of the poor visibility is a water droplet on the inner surface 10b of the windshield 10, the second heater 22 raises the temperature of the inner surface 10b and suppresses the temperature rise of the outer surface 10a. Thereby, the energy consumption required for ensuring visibility through the windshield 10 can be reduced.

  Moreover, the 1st heater 21, the heat insulation layer 23, and the 2nd heater 22 mutually overlap, and form the sheet-like heater 20 which is a sheet | seat body. And the sheet-like heater 20 is arrange | positioned in the site | part which faces the room | chamber interior 3 of the vehicle 2 among the windshields 10. FIG. According to this, by providing the sheet heater 20 in which the first and second heaters 21 and 22 and the heat insulation layer 23 overlap each other on the inner surface of the shield body 11, the first heater 21, the heat insulation layer 23, and the second heater 21 are provided. The shield 10 including the heater 22 can be easily provided.

  Further, the defroster device 1 is a DEF switch that is a cancellation request switch means that is provided in the vehicle 2 and is operated when it is necessary to eliminate a visual field defect via the shield 10 and is set to an ON state that is a visual field resolution request state. 30. Further, the defroster device 1 includes a fogging sensor 40 that is a fogging detecting unit that detects whether or not the inner surface 10b that is the surface of the shield 10 on the indoor 3 side is cloudy.

  Then, when the DEF switch 30 is in the on state, the control unit 50 serving as a switching unit switches between the energized state and the non-energized state of the first heater 21 and the second heater 22 according to the detection result of the fogging sensor 40. Control means for performing switching control. When the def sensor 30 detects the fogging of the inner surface 10b when the DEF switch 30 is in the ON state, the control unit 50 serving as the control means sets the second heater 22 to the energized state. In addition, when the def sensor 30 is in the on state and the fogging sensor 40 does not detect the fogging of the inner surface 10b, the control unit 50 sets the first heater 21 to the energized state and the second heater 22. Is set to a non-energized state.

  According to this, when the fog sensor 40 detects 10b fogging of the windshield 10 when the DEF switch 30 is turned on by being operated by an occupant or the like, the control unit 50 controls the second heater 22. The inner surface 10b is heated by energizing to generate heat. Thereby, the cloudiness of the inner surface 10b can be cleared, and the field of view through the windshield 10 can be secured.

  On the other hand, when the fog sensor 40 does not detect fog on the inner surface 10b of the windshield 10 when operated by a passenger or the like and the DEF switch 30 is in the ON state, the controller 50 controls the first heater 21. The outer surface 10a is heated by energizing to generate heat. At this time, the control unit 50 does not energize the second heater 22. When an occupant or the like turns on the DEF switch 30, if the inner surface 10b of the windshield 10 is not fogged, it is estimated that the cause of the poor visibility is ice on the outer surface 10a. Accordingly, when the occupant or the like turns on the DEF switch 30 and the fogging sensor 40 does not detect the fogging of the inner surface 10b of the windshield 10, the view through the windshield 10 by melting the ice of the outer surface 10a. Can be secured.

  As described above, when the occupant or the like turns on the DEF switch 30, the control unit 50 energizes the first heater 21 and the second heater 22 depending on whether or not the inner surface 10 b detected by the fog sensor 40 is clouded. Take control. Thereby, the visual field defect via the windshield 10 can be easily solved while suppressing energy consumption.

  Further, the fogging sensor 40 is a sensor that detects the presence or absence of fogging of the inner surface 10b based on the temperature of the air in the room 3, the humidity of the air in the room 3, and the temperature of the inner surface 10b of the shield 10. According to this, the fogging sensor 40 reliably and easily determines whether the inner surface 10b is cloudy based on the temperature of the air in the room 3, the humidity of the air in the room 3, and the temperature of the inner surface 10b of the windshield 10. Can be detected.

(Second Embodiment)
Next, a second embodiment will be described based on FIG. 7 and FIG.

  The second embodiment differs from the first embodiment described above in that the output of the first heat generating unit is adjusted. In addition, about the part similar to 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. Components having the same reference numerals as those in the drawings according to the first embodiment and other configurations not described in the second embodiment are the same as those in the first embodiment, and have the same effects. .

  As shown in FIG. 7, the defroster device that is the anti-fogging and defrosting device for vehicles of this embodiment includes an outside air temperature sensor 41, a vehicle speed sensor 42, and an inner surface temperature sensor 43. The outside air temperature sensor 41 is an outside air temperature detecting means for detecting the air temperature outside the outdoor 4 of the vehicle 2. The vehicle speed sensor 42 is a vehicle speed detection unit that detects the traveling speed of the vehicle 2. The inner surface temperature sensor 43 is an inner surface temperature detection unit that detects the temperature of the inner surface of the shield body 11. The inner surface temperature sensor 43 is provided, for example, between the shield body 11 and the first heater 21 shown in FIG.

  The outside air temperature sensor 41 outputs outside air temperature information to the control unit 50. The vehicle speed sensor 42 outputs vehicle speed information to the control unit 50. The inner surface temperature sensor 43 outputs the inner surface temperature information of the shield body 11 to the control unit 50. The controller 50 inputs information from each of the sensors 41 to 43, calculates the temperature of the outer surface 10a of the shield 10, and performs energization control of the first heater 21. The outside air temperature sensor 41, the vehicle speed sensor 42, and the inside surface temperature sensor 43 correspond to outside surface temperature detecting means for detecting the temperature of the outside surface 10a that is the surface of the shield 10 on the outdoor 4 side of the vehicle 2. The outer surface temperature detecting means is not limited to the sensors 41 to 43 described above. The outer surface temperature detecting means may be a temperature sensor provided on the outer surface 10a of the shield 10, for example.

  Next, based on the above configuration, a part of the visibility ensuring control operation performed by the control unit 50 of the present embodiment will be described. As shown in FIG. 8, after executing Step 140 described in the first embodiment, the control unit 50 inputs signals from the outside air temperature sensor 41, the vehicle speed sensor 42, and the inner surface temperature sensor 43 (Step 141).

  Then, based on the information input in step 141, the temperature of the outer surface 10a of the shield 10 is calculated (step 142). In step 142, for example, the outside air temperature detected by the outside air temperature sensor 41, the speed detected by the vehicle speed sensor 42, the thickness and thermal conductivity of the shield body 11, and the temperature of the inner surface of the shield body 11 detected by the inner surface temperature sensor 43. Based on the above, the temperature of the outer surface 10a is calculated.

  When step 142 is executed, the output of the first heater 21 is adjusted (step 143). In step 143, the energization state of the first heater 21 is adjusted so that the temperature of the outer surface 10a calculated in step 142 is within a predetermined temperature range higher than 0 ° C., and the heat output of the first heater 21 is adjusted. Adjustment of the energization state of the first heater 21 is performed by adjusting the voltage application state. The energization state of the first heater 21 is adjusted by, for example, voltage on / off control. Here, the predetermined temperature range higher than 0 ° C. can be set to 1 ° C. to 3 ° C., for example. After executing step 143, the process returns to step 110.

  According to the defroster device of this embodiment, the same effect as that of the first embodiment can be obtained.

  Further, the defroster device of the present embodiment includes sensors 41 to 43 as outer surface temperature detecting means for detecting the temperature of the outer surface 10a which is the surface of the windshield 10 on the outdoor 4 side of the vehicle 2. When the first heater 21 is set in the energized state, the control unit 50 that is a control unit is configured so that the temperature of the outer surface 10a detected by the outer surface temperature detection unit falls within a predetermined temperature range higher than 0 ° C. The heat output from the first heater 21 is adjusted.

  According to this, when the controller 50 is energized to the first heater 21, the outer surface temperature detected by the outer surface temperature detecting means is within a predetermined temperature range in which the ice can be defrosted higher than 0 ° C. 1 Heat output from the heater 21 is adjusted. Accordingly, the heat generated from the first heater 21 can surely melt the ice on the outer surface 10a of the windshield 10, and energy consumption in the first heater 21 can be suppressed.

(Third embodiment)
Next, a third embodiment will be described based on FIG. 9 and FIG.

  The third embodiment differs from the first embodiment described above in the method of determining the cause of poor visibility through the windshield. In addition, about the part similar to 1st, 2nd embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. Components having the same reference numerals as those in the drawings according to the first and second embodiments, and other configurations not described in the third embodiment are the same as those in the first and second embodiments, and have similar functions. There is an effect.

  As shown in FIG. 9, the defroster device that is the anti-fogging and defrosting device for vehicles of this embodiment includes an outside air temperature sensor 41, a vehicle speed sensor 42, and a seating sensor 44. The seating sensor 44 is an occupant detection unit that detects an occupant who has boarded the passenger compartment 3 of the vehicle 2. The seating sensor 44 is provided, for example, on a seat installed in the room 3 of the vehicle 2.

  The occupant detection means is not limited to the seating sensor 44. As the occupant detection means, for example, an infrared sensor may be used. The occupant detection means detects an elapsed time after the occupant gets into the room 3 in cooperation with the control unit 50, for example. The occupant detection means is also an elapsed time detection means for detecting an elapsed time after boarding the occupant in the vehicle interior. The seating sensor 44 corresponds to the elapsed time detection means in this embodiment.

  The seating sensor 44 outputs information on presence / absence of the occupant or elapsed time information after boarding the occupant to the control unit 50. The control unit 50 inputs information from each of the sensors 41, 42, 44 and performs energization control of the first heater 21 and the second heater 22.

  Next, the view ensuring control operation performed by the control unit 50 of the present embodiment will be described. As shown in FIG. 10, if it is determined as YES in step 110, the control unit 50 inputs signals from the outside air temperature sensor 41, the vehicle speed sensor 42, and the seating sensor 44 (step 320). Next, based on the information input in step 320, it is determined whether or not the outside air temperature is 0 ° C. or less (step 330). If it is determined in step 330 that the outside air temperature is 0 ° C. or less, it is determined whether the vehicle speed is 0, that is, whether the vehicle is not running, based on the information input in step 320 (step 340). If it is determined in step 340 that the vehicle speed is 0, it is determined whether or not the elapsed time after the occupant rides is a predetermined time or less based on the information input in step 320 (step 350). If it is determined in step 350 that the elapsed time is equal to or shorter than the predetermined time, the process proceeds to step 140.

  If it is determined in step 330 that the outside air temperature is higher than 0 ° C., the process proceeds to step 150. If it is determined in step 340 that the vehicle speed is greater than 0, the process proceeds to step 150. If it is determined in step 350 that the elapsed time is equal to or longer than the predetermined time, the process proceeds to step 150. That is, when it is determined that the outside air temperature is 0 ° C. or less, the vehicle speed is 0, and the elapsed time after boarding the passenger is a predetermined time or less, the routine proceeds to step 140. On the other hand, if it is determined that the outside air temperature is higher than 0 ° C., the vehicle speed is higher than 0, or the elapsed time after boarding the passenger is longer than the predetermined time, the routine proceeds to step 150.

  The defroster device according to the present embodiment includes an outside air temperature sensor 41 that detects an outside air temperature that is an air temperature outside the outdoor 4 of the vehicle 2, a vehicle speed sensor 42 that detects the speed of the vehicle 2, and an occupant boarding in the room 3 of the vehicle 2. And a seating sensor 44 for detecting a later elapsed time. When the DEF switch 30 is in the ON state, the control unit 50 that is a switching unit energizes the first heater 21 and the second heater 22 according to the detection results of the outside air temperature sensor 41, the vehicle speed sensor 42, and the seating sensor 44. Control means for performing switching control between a state and a non-energized state.

  When the outside air temperature is 0 ° C. or less, the speed of the vehicle 2 is 0, and the elapsed time after boarding the occupant is a predetermined time or less when the DEF switch 30 is in the on state, the control unit 50 The first heater 21 is set to an energized state, and the second heater 22 is set to a non-energized state. In addition, when the DEF switch 30 is in the ON state, the control unit 50 has an outside air temperature higher than 0 ° C., the speed of the vehicle 2 is higher than 0, or an elapsed time after boarding the occupant is longer than a predetermined time. In that case, the second heater 22 is set to an energized state.

  According to this, when the detection result of each sensor 41, 42, 44 satisfies the following condition when operated by a passenger or the like and the DEF switch 30 is in the ON state, the control unit 50 1 The heater 21 is energized to generate heat and the outer surface 10a is heated. When the outside air temperature detected by the outside air temperature sensor 41 is 0 ° C. or less, the speed of the vehicle 2 detected by the vehicle speed sensor 42 is 0, and the elapsed time detected by the seating sensor 44 is less than a predetermined time, 1 The heater 21 is energized. At this time, the control unit 50 does not energize the second heater 22.

  When the detection results of the outside air temperature sensor 41, the vehicle speed sensor 42, and the seating sensor 44 satisfy the above-described conditions when the occupant or the like turns on the DEF switch 30, the cause of the poor visibility is caused by the outer surface 10a. Presumed to be ice. Therefore, when an occupant or the like turns on the DEF switch 30 and the detection results of the sensors 41, 42, and 44 satisfy the above-described conditions, the ice on the outer surface 10a of the windshield 10 is melted and the window is melted. A field of view through the shield 10 can be secured.

  On the other hand, when the detection results of the sensors 41, 42, and 44 satisfy the following conditions when the DEF switch 30 is turned on by being operated by an occupant or the like, the controller 50 controls the second heater. The inner surface 10b is heated by energizing 22 and generating heat. When the outside air temperature detected by the outside air temperature sensor 41 is higher than 0 ° C., the vehicle speed detected by the vehicle speed sensor 42 is higher than 0, or the elapsed time detected by the seating sensor 44 is longer than a predetermined time, Energization of the second heater 22 is performed.

  When the detection results of the outside air temperature sensor 41, the vehicle speed sensor 42, and the seating sensor 44 satisfy the above-described conditions while the occupant or the like is turning on the DEF switch 30, the cause of the poor visibility is caused by the inner surface 10b. Presumed to be water droplets. Therefore, when the occupant or the like turns on the DEF switch 30 and the detection results of the sensors 41, 42, and 44 satisfy the above-described conditions, the windshield 10 is covered with the cloudy wind on the inner surface 10b. A field of view through the shield 10 can be secured.

  If the outside air temperature is 0 ° C. or less, icing may occur on the outer surface 10 a of the shield 10. However, when the vehicle speed is higher than 0 and the vehicle is traveling, it is presumed that the outer surface 10a of the shield 10 is not icing or has already been eliminated. Further, when the passenger has boarded and a predetermined time or more has passed, it is estimated that the cause of the poor visibility is clouding of the inner surface 10 b of the shield 10. Based on these environmental factors, the control unit 50 estimates and detects the cause of the visual field defect, and performs energization control to the first heater 21 and the second heater 22 so as to eliminate the detected visual field defect cause.

  As described above, when the occupant or the like turns on the DEF switch 30, the control unit 50 controls energization of the first heater 21 and the second heater 22 according to the detection results of the sensors 41, 42, and 44. . Thereby, the visual field defect via the windshield 10 can be easily solved while suppressing energy consumption.

(Fourth embodiment)
Next, a fourth embodiment will be described based on FIG. 11 and FIG.

  The fourth embodiment differs from the first embodiment described above in that it includes a remote output unit that can set the visibility defect elimination mode from the outside of the vehicle. In addition, about the part similar to the 1st-3rd embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. Components having the same reference numerals as those in the drawings according to the first to third embodiments, and other configurations not described in the fourth embodiment are the same as those in the first to third embodiments, and have the same functions. There is an effect.

  As shown in FIG. 11, the defroster device that is the anti-fogging and defrosting device for a vehicle according to the present embodiment is a remote switch that is a remote output means that can output a command for eliminating the poor visibility through the windshield 10 from the outside of the vehicle. 31 is provided. For example, the remote switch 31 can be a portable switch device dedicated to the vehicle 2. For example, the remote switch 31 may be a general-purpose portable terminal device in which an application program capable of outputting a visual field defect elimination command is set. The remote switch 31 can be, for example, a switch device fixedly installed inside a building adjacent to a parking place.

  Further, the defroster device of the present embodiment includes a fog sensor 40 that is a fog detection unit and a seating sensor 44 that is an occupant detection unit. The cloudiness sensor 40 outputs the detected cloudy presence / absence information to the control unit 50. The seating sensor 44 outputs the detected presence / absence information of an occupant in the room 3 of the vehicle 2 to the control unit 50. The control unit 50 inputs information from the fogging sensor 40 and the seating sensor 44 and performs energization control of the first heater 21 and the second heater 22.

  Next, the view ensuring control operation performed by the control unit 50 of the present embodiment will be described. As shown in FIG. 12, when it is determined in step 110 that the DEF switch 30 is not turned on and is in an off state, the control unit 50 determines whether or not the remote switch 31 is in an on state ( Step 410). In step 410, it is determined whether a cancel command from the remote switch 31 has already been input. When the cancellation command from the remote switch 31 is input, the control unit 50 sets the cancellation operation mode for eliminating the visual field defect via the shield 10. In step 410, it is determined whether or not the cancel operation mode is set by operating the remote switch 31.

  If it is determined in step 410 that the remote switch 31 is on, sensor information is acquired (step 420). In step 420, information regarding the presence or absence of a passenger in the room 3 is input from the seating sensor 44. When step 420 is executed, it is determined whether there is an occupant already boarded in the room 3 based on the information acquired in step 420 (step 130).

  If it is determined in step 430 that there is a passenger in the room 3, the process proceeds to step 120. On the other hand, if it is determined in step 430 that there is no occupant in the room 3, the process proceeds to step 140. If it is determined in step 410 that the remote switch 31 is not turned on and is in an off state, the process proceeds to step 160. If the command to eliminate the poor visibility has not been issued from either the DEF switch 30 or the remote switch 31, step 160 is executed to turn off the first heater 21 and the second heater 22 both. In step 160, if the first heater 21 and the second heater 22 are already in a non-energized state, the non-energized state is continued.

  The defroster device according to the present embodiment includes a remote switch 31 that is a remote output means capable of outputting a vision defect elimination command from the outdoor 4 of the vehicle 2 via the windshield 10. In addition, the defroster device includes a seating sensor 44 that is an occupant detection unit that detects an occupant who has boarded the passenger compartment 3 of the vehicle 2. The control unit 50 serving as a switching unit sets a canceling operation mode for canceling a visual field defect via the windshield 10 based on the canceling command output by the remote switch 31. The control unit 50 controls the switching between the energized state and the non-energized state of the first heater 21 and the second heater 22 in accordance with the detection result of the seating sensor 44 when the elimination operation mode is set. It is.

  When the seating sensor 44 does not detect the occupant who has boarded when the elimination operation mode is set, the control unit 50 sets the first heater 21 to the energized state and the second heater 22 to the non-energized state. Set to.

  According to this, when the seating sensor 44 does not detect an occupant boarded in the room 3 when the canceling operation mode is set based on the canceling command output from the remote switch 31, the control unit 50 causes the first heater 21 to detect the passenger. Is heated to generate heat and the outer surface 10a of the shield 10 is heated. At this time, the control unit 50 does not energize the second heater 22.

  If the occupant or the like issues a cancellation command from the remote switch 31 and the cancellation operation mode is set, and there is no occupant in the room 3, the inner surface 10b is less likely to be clouded and the visibility is poor. This is due to the ice on the outer surface. Accordingly, when the seating sensor 44 does not detect an occupant who has boarded the room 3 when the canceling operation mode is set based on the canceling command output by the remote switch 31, if there is ice on the outer surface 10a, the ice is melted and the window is melted. A field of view through the shield 10 can be secured.

  As described above, when the occupant or the like issues a cancellation command from the remote switch 31 and sets the cancellation operation mode, the control unit 50 applies the first heater 21 and the second heater 22 according to the detection result of the seating sensor 44. The energization control is performed. Thereby, the visual field defect via the windshield 10 can be easily solved while suppressing energy consumption.

  In addition, the defroster device of the present embodiment includes a fogging sensor 40 that is a fogging detection unit that detects the presence or absence of fogging of the inner surface 10b that is the surface of the windshield 10 on the indoor 3 side. The control unit 50, which is a control unit, performs switching control between the energized state and the non-energized state of the first heater 21 and the second heater 22 according to the detection result of the fogging sensor 40.

  The control unit 50 detects the occupant on which the seating sensor 44 has boarded when the canceling operation mode is set, and if the fogging sensor 40 detects fogging of the inner surface 10b, the control unit 50 turns the second heater 22 off. Set to the energized state. In addition, when the elimination operation mode is set, the control unit 50 detects the occupant on which the seating sensor 44 has boarded, and if the fogging sensor 40 does not detect the fogging of the inner surface 10b, the first heater 21 is set to an energized state, and the second heater 22 is set to a non-energized state.

  According to this, when the cancellation operation mode is set by the cancellation command from the remote switch 31, the control unit 50 determines the first heater 21 and the second heater 22 according to the detection results of the seating sensor 44 and the fogging sensor 40. The energization is controlled as follows. When the seating sensor 44 detects an occupant riding in the room 3 and the fog sensor 40 detects fog on the inner surface 10b of the shield 10, the control unit 50 energizes the second heater 22 to generate heat. The surface 10b is heated. Thereby, the cloudiness of the inner surface 10b of the windshield 10 can be cleared, and the field of view through the windshield 10 can be ensured.

  On the other hand, when the seating sensor 44 detects an occupant who has entered the room 3 and the fog sensor 40 does not detect fog on the inner surface 10b of the windshield 10, the controller 50 energizes the first heater 21. The outer surface 10a is heated by generating heat. At this time, the control unit 50 does not energize the second heater 22. Thereby, if there is icing on the outer surface 10 a of the windshield 10, the ice can be melted to ensure visibility through the windshield 10.

  As described above, when the occupant or the like issues the cancel command from the remote switch 31 and sets the cancel operation mode, the control unit 50 determines whether the first heater 21 and the first heater 21 are in accordance with the detection results of the seating sensor 44 and the fogging sensor 40. 2 Energization control to the heater 22 is performed. Thereby, the visual field defect via the windshield 10 can be easily and reliably eliminated while suppressing energy consumption.

  In the description of the present embodiment described above, the occupant detection means is the seating sensor 44, but is not limited to this. The occupant detection means may be an infrared sensor that detects an occupant with infrared rays, for example. Further, as the occupant detection means, for example, a door lock release detection means for detecting release of the door lock of the vehicle 2 or a door open / close detection means for detecting opening / closing of the door may be used. Further, the fog detection means is not limited to the fog sensor 40, and for example, an optical detection device that detects fog on the inner surface 10b of the shield 10 may be used.

  Further, in the present embodiment, the remote switch 31 is turned on to output a cancellation command, and the control unit 50 inputs the cancellation command and sets the cancellation operation mode. If the remote switch 31 is turned off after the cancellation operation mode is set, the cancellation operation mode is canceled. That is, NO is determined in step 410 shown in FIG. The cancellation of the cancellation operation mode may not be performed by turning off the remote switch 31. For example, after the remote switch 31 is turned on and the control unit 50 sets the cancel operation mode, the control unit 50 cancels the cancel operation mode even if the remote switch 31 is not turned off when a predetermined time has elapsed. There may be. The determination in step 410 can also be NO in such a case. Here, the predetermined time that is automatically turned off by the timer is set based on the time during which the visual field defect can be reliably canceled in the vehicle 2.

  Note that the visibility securing control can also be terminated when the DEF switch 30 is not operated for a predetermined time after the DEF switch 30 is turned on. When a predetermined time has elapsed without being turned off after the DEF switch 30 is turned on, the control unit 50 can turn off the first heater 21 and the second heater 22. Even when a predetermined time elapses without being turned off after the DEF switch 30 is turned on, the control unit 50 can determine in step 110 that the DEF switch 30 is turned off. This is applicable not only in the present embodiment but also in the first to fourth embodiments described above. Here, the predetermined time that the control unit 50 automatically turns off with the timer is set based on the time during which the visual field defect can be reliably canceled in the vehicle 2.

  Further, in the present embodiment, in step 420 and step 430, the detection of the occupant who has boarded the room 3 and the presence / absence thereof are determined, but the present invention is not limited to this. It may be determined whether or not there is only a driver. That is, in step 420 and step 430, the detection of the occupant who has boarded the driver's seat of the vehicle 2 and the presence / absence thereof may be performed.

  Moreover, in this embodiment, when it is judged as YES at step 410, step 420 and step 430 were performed, but it is not limited to this. Step 420 and step 430 may be omitted. That is, if YES is determined in step 410, the process may proceed to step 140. When the remote switch 31 is turned on and the cancel operation mode is set by the output cancel command, the control unit 50 controls the first heater 21 and the second heater 22 regardless of the presence or absence of a passenger.

  Such a defroster device is provided with a remote switch 31 which is a remote output means capable of outputting a vision defect elimination command from the outdoor 4 of the vehicle 2 via the windshield 10. The control unit 50 that is a switching unit sets a cancellation operation mode that eliminates poor visibility via the shield 10 based on the cancellation command output by the remote switch 31, and sets the energization state of the first heater 21 and the second heater 22. It is a control means which performs switching control with a non-energized state. When the elimination operation mode is set, the control unit 50 sets the first heater 21 to the energized state and sets the second heater 22 to the non-energized state.

  According to this, when the cancellation operation mode is set based on the cancellation command output from the remote switch 31, the control unit 50 energizes the first heater 21 to generate heat and heats the outer surface 10a. At this time, the control unit 50 does not energize the second heater 22.

  When an occupant or the like issues a cancel command from the remote switch 31 and the cancel operation mode is set, if there is poor visibility, it is often due to ice on the outer surface 10a. Therefore, when the canceling operation mode is set based on the canceling command output from the remote switch 31, if there is icing on the outer surface 10a, the ice can be melted and the view through the windshield 10 can be secured.

  As described above, the control unit 50 performs energization control to the first heater 21 and the second heater 22 in accordance with the setting state of the cancellation operation mode based on the cancellation command from the remote switch 31. Thereby, the visual field defect via the windshield 10 can be easily solved while suppressing energy consumption.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. The structure of the said embodiment is an illustration to the last, Comprising: The scope of the present invention is not limited to the range of these description. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  In each of the embodiments described above, the cancellation request switch means is the DEF switch 30 composed of one switch, but is not limited to this. For example, as shown in FIG. 13, the DEF switch, which is the cancellation request switch means, may be composed of two switches, the de-icing request switch 30A and the anti-fogging request switch 30B. The control unit 50 switches between the energized state and the non-energized state of the first heater 21 based on the on / off state of the de-icing request switch 30A. Further, the control unit 50 switches between the energized state and the non-energized state of the second heater 22 based on the on / off state of the anti-fogging request switch 30B.

  In the defroster device illustrated in FIG. 13, the control unit 50 controls energization of the first heater 21 and the second heater 22 based on input signals from the defrost request switch 30A and the anti-fogging request switch 30B of the DEF switch. However, it is not limited to this. For example, without supplying the control unit 50, the power supply system to the first heater 21 is directly opened / closed by turning on / off the de-icing request switch 30A, and the power is directly supplied to the second heater 22 by turning on / off the anti-fogging request switch 30B. You may open and close a system | strain. In this case, the de-icing request switch 30A and the anti-fogging request switch 30B correspond to switching means.

  Further, in each of the above-described embodiments, the sheet-like heater 20 that is a sheet body in which the first heater 21, the heat insulating layer 23, and the second heater 22 are overlapped is disposed in a portion of the shield 10 that faces the room 3. However, it is not limited to this configuration. For example, as shown in FIG. 14, the first heater 21 is disposed inside the shield body 11, and a sheet in which the heat insulating layer 23 and the second heater 22 are overlapped is adhered to the inner surface of the shield body 11. There may be. When the shield body 11 positioned between the first heater 21 and the second heater 22 has a relatively large thermal resistance in the thickness direction, the shield body 11 is used as a heat insulating portion, It is also possible to omit the layer 23.

  In each of the above embodiments, the first heater 21 that is the first heat generating portion and the second heater 22 that is the second heat generating portion are both film heaters having a transparent conductive film, but are not limited thereto. It is not a thing. For example, one or both of the first heat generating portion and the second heat generating portion may be configured by wiring thin heat generating wires that do not significantly obstruct the view in the transparent member.

  Moreover, in each said embodiment, although the windshield 10 was the front windshield of the vehicle 2, it is not limited to this. The present invention can also be applied to, for example, a rear windshield, a side windshield, and a front side windshield. The side windshield is sometimes called a side door windshield. The front side windshield is sometimes called a front quarter windshield.

1 Defroster device (Anti-fogging deicing device for vehicles)
2 Vehicle 3 Indoor 10 Windshield 10b Inner surface 20 Sheet heater (sheet body)
21 1st heater (1st heating element)
22 Second heater (second heating element)
23 Heat insulation layer (heat insulation part)
30 DEF switch (cancellation request switch means)
40 Cloudiness sensor (fogging detection means)
50 Control unit (switching means, control means)

Claims (7)

The windshield (10) of the vehicle (2);
A first heat generating part (21) provided on the windshield and generating heat by energization;
A second heat generating part (22) provided in the windshield, disposed in a position closer to the vehicle interior (3) than the first heat generating part in the thickness direction of the windshield, and generates heat by energization;
A heat insulating part (23) provided on the windshield and disposed between the first heat generating part and the second heat generating part in the thickness direction of the windshield;
Switching between the energized state and the non-energized state of the first heat generating unit and the switching between the energized state and the non-energized state of the second heat generating unit are performed between the first heat generating unit and the second heat generating unit. Switching means (50) capable of being individually performed;
A cancellation request switch means (30) provided in the vehicle and operated when it is necessary to eliminate the poor visibility through the windshield, and is set to an on state which is a request for eliminating the poor visibility,
Fogging detection means (40) for detecting the presence or absence of fogging of the inner surface (10b) which is the indoor side surface of the windshield,
The switching means switches between the energized state and the non-energized state of the first heat generating part and the second heat generating part according to the detection result of the fogging detecting means when the cancellation request switch means is in the on state. A control means for performing switching control,
The control means includes
When the cancellation request switch means is in the on state,
When the clouding detection means detects the clouding of the inner surface, the second heat generating unit is set to an energized state,
When the fog detecting means does not detect the fog on the inner surface, the first heat generating portion is set in an energized state, and the second heat generating portion is set in a non-energized state. Defrosting device. The cloudiness detecting means, the indoor air temperature, the room air humidity, and, based on the temperature of the inner surface, to claim 1, characterized in that to detect the presence or absence of fogging of the inner surface The anti-fog deicing device for vehicles as described. The windshield (10) of the vehicle (2);
A first heat generating part (21) provided on the windshield and generating heat by energization;
A second heat generating part (22) provided in the windshield, disposed in a position closer to the vehicle interior (3) than the first heat generating part in the thickness direction of the windshield, and generates heat by energization;
A heat insulating part (23) provided on the windshield and disposed between the first heat generating part and the second heat generating part in the thickness direction of the windshield;
Switching between the energized state and the non-energized state of the first heat generating unit and the switching between the energized state and the non-energized state of the second heat generating unit are performed between the first heat generating unit and the second heat generating unit. Switching means (50) capable of being individually performed;
A cancellation request switch means (30) provided in the vehicle and operated when it is necessary to eliminate the poor visibility through the windshield, and is set to an on state which is a request for eliminating the poor visibility,
An outside air temperature detecting means (41) for detecting an outside air temperature which is an air temperature outside the vehicle;
Vehicle speed detection means (42) for detecting the speed of the vehicle;
Elapsed time detection means (44) for detecting the elapsed time after boarding the passenger in the vehicle,
The switching means, when the cancellation request switch means is in the ON state, according to detection results of the outside air temperature detection means, the vehicle speed detection means, and the elapsed time detection means, 2 is a control means for performing switching control between the energized state and the non-energized state of the heat generating portion,
The control means includes
When the cancellation request switch means is in the on state,
The outside air temperature detected by the outside air temperature detecting means is 0 ° C. or less, the vehicle speed detected by the vehicle speed detecting means is 0, and the elapsed time detected by the elapsed time detecting means is less than a predetermined time. In some cases, the first heat generating unit is set to an energized state and the second heat generating unit is set to a non-energized state.
The outside air temperature detected by the outside air temperature detecting means is higher than 0 ° C., the vehicle speed detected by the vehicle speed detecting means is larger than 0, or the elapsed time detected by the elapsed time detecting means is predetermined. When the time is longer than the time , the vehicular anti-fogging deicing device is characterized in that the second heat generating portion is set in an energized state . The windshield (10) of the vehicle (2);
A first heat generating part (21) provided on the windshield and generating heat by energization;
A second heat generating part (22) provided in the windshield, disposed in a position closer to the vehicle interior (3) than the first heat generating part in the thickness direction of the windshield, and generates heat by energization;
A heat insulating part (23) provided on the windshield and disposed between the first heat generating part and the second heat generating part in the thickness direction of the windshield;
Switching between the energized state and the non-energized state of the first heat generating unit and the switching between the energized state and the non-energized state of the second heat generating unit are performed between the first heat generating unit and the second heat generating unit. Switching means (50) capable of being individually performed;
A remote output means (31) capable of outputting a command to eliminate a poor visibility through the windshield from outside the vehicle;
Occupant detection means (44) for detecting an occupant boarded in the interior of the vehicle,
The switching means sets a cancel operation mode for canceling a visual field defect through the windshield based on the cancel command output by the remote output means, and when the cancel operation mode is set, the occupant Control means for performing switching control between the energized state and the non-energized state of the first heat generating part and the second heat generating part according to the detection result of the detecting means;
The control means includes
When the cancellation operation mode is set,
When the occupant detection means does not detect the occupant on board, the first heat generating portion is set in an energized state, and the second heat generating portion is set in a non-energized state. De-icing device. A fog detecting means (40) for detecting the presence or absence of fog on the inner surface (10b) which is the indoor side surface of the windshield;
The control means performs switching control between the energized state and the non-energized state of the first heat generating part and the second heat generating part according to the detection result of the fogging detecting means,
The control means includes
When the cancellation operation mode is set,
When the occupant detection means detects the occupant who has boarded, and the cloudiness detection means detects cloudiness of the inner surface, the second heat generating portion is set in an energized state,
When the occupant detection means detects the occupant who has boarded and the fog detection means does not detect fog on the inner surface, the first heat generating part is set in an energized state and the second heat generating part Is set to a non-energized state, the anti-fogging deicing device for vehicles according to claim 4 . The first heat generating portion, the heat insulating portion, and the second heat generating portion overlap each other to form a sheet body (20),
The anti-fogging solution for a vehicle according to any one of claims 1 to 5, wherein the seat body is disposed in a portion of the windshield that faces a room (3) of the vehicle. Ice equipment. Outer surface temperature detection means (41, 42, 43) for detecting the temperature of the outer surface (10a), which is the surface of the windshield on the outdoor (4) side of the vehicle,
When the first heat generating portion is set in an energized state, the control means is configured so that the temperature of the outer surface detected by the outer surface temperature detecting means falls within a predetermined temperature range higher than 0 ° C. The anti-fogging deicing device for vehicles according to any one of claims 1 to 6, wherein the heat output from one heat generating part is adjusted.

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