JP2005239133A - Overhead module for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mount equipment with low heat resistance such as electronic equipment by suppressing a temperature rise of an overhead module. <P>SOLUTION: A cold storage material 106 is provided by mounting an outside case 101, a heat insulating case 102 and a heat insulating plate 103 inside a roof C1 of a vehicle and closely adhering the electronic equipment 105 within the cases 101 and 102. By covering the electronic equipment 105 and the cold storage material 106 with the heat insulating case 102 and the heat insulating plate 103, heat is shut out and the temperature rise of the overhead module is suppressed for long time by the effect of the cold storage material 106. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle overhead module, and more particularly, to a vehicle overhead module including a mechanism for holding electronic devices mounted on a vehicle ceiling portion at a predetermined temperature or lower when left under a hot sun.

  In recent years, it has been studied to mount electronic devices such as communication devices on an overhead module installed on a vehicle ceiling. These electronic devices need to be operated not only when driving a vehicle, but also when parked or left, but due to the low heat-resistant temperature (for example, about 60 to 70 ° C.), a rise in temperature when left is a problem. Become. In particular, when left in hot weather, the ceiling of the vehicle becomes hot due to the radiant heat of the sun, and the air temperature in the passenger compartment increases, which may cause the overhead module to become hot and adversely affect the operation of the mounted equipment. There is.

Here, a conventional overhead module has been mounted with a high heat-resistant temperature (usually 100 ° C. or higher) such as a map lamp or a sunglasses case. For this reason, many conventionally known techniques are related to the connector structure and wiring (for example, Patent Document 1), and those related to heat countermeasures have not been known so far. As other vehicle devices, Patent Document 2 describes providing a heat shield to prevent solar radiation on the back of the inner mirror, and Patent Document 3 describes providing a vent hole. Then the effect is not enough.
JP 2000-272409 A JP-A-9-188196 Japanese Patent Laid-Open No. 9-188195

Furthermore, many techniques for suppressing the temperature rise in the passenger compartment due to solar radiation as a whole vehicle have been proposed. For example, Patent Document 4 discloses a roof made of a ceiling, a windshield, and a rear glass as a hollow double structure, and is selectively in a vacuum state. And the like. However, this structure has a problem that the cost is high for the purpose of suppressing the temperature rise of the overhead module. Although a cooling device may be attached to the overhead module, it is not preferable to use power (for example, a battery) for cooling when the vehicle is left.
Japanese Patent Laid-Open No. 7-25359

  As described above, the conventional overhead module has not been configured so as to suppress the temperature rise so far, and it has been difficult to mount electronic devices. Therefore, the present invention is equipped with a device having low heat resistance such as electronic devices, and is capable of holding these devices at a certain temperature or lower even under a special environment such as when left in the sun. The object is to provide a simple and low-cost vehicle overhead module.

  In the overhead module for a vehicle according to the first aspect of the present invention, an overhead module case is installed in the vicinity of the ceiling portion of the passenger compartment, and the regenerator material is disposed in the overhead module case in the vicinity of the mounted device. Furthermore, it has the heat insulation member arrange | positioned so that the circumference | surroundings of these mounted equipment and a cool storage material may be covered.

  If the vehicle is left under the hot sun, the overhead module temperature may exceed the allowable temperature of the mounted equipment due to the heat from the ceiling. For this reason, in the structure of Claim 1, a cool storage material is adjoined to an apparatus and the temperature rise of an mounted apparatus is suppressed. Furthermore, the heat from the surroundings is minimized by surrounding the mounted device and the cold storage material with a heat insulating member. As a result, the temperature of the on-board equipment can be maintained below the allowable temperature, and no power is used. Therefore, a low-cost overhead module can be realized with a simple configuration.

  The invention according to claim 2 is another invention for solving the problems of the present invention. An overhead module case installed in the vicinity of a ceiling portion of the passenger compartment is provided with an air introduction port communicating with the passenger compartment, and the overhead module is provided. A heat insulating member that covers the periphery of the mounted device in the case and forms a closed space for storing the device is disposed. Further, the heat insulating member is provided with an opening / closing door that opens and closes according to the internal and external temperatures.

  In the above configuration, for example, when the air temperature in the passenger compartment is low, the open / close door is opened, and this low-temperature air is introduced into the heat insulating member from the air introduction port, so that the mounted equipment is sufficiently cooled. At the time of parking, the temperature of the space in the heat insulating member can be prevented from rising by closing the open / close door and enhancing the heat insulating property. Even in this case, the on-board equipment can be kept at a low temperature for a long time when left under the hot sun. Further, since no power is used during parking, a low-cost overhead module can be realized with a simple configuration.

  According to a third aspect of the present invention, there is provided control means for opening and closing the opening / closing door provided on the heat insulating member based on the temperature of the mounted device and the temperature in the passenger compartment.

  The control means directly or indirectly measures the temperature of the mounted equipment and the temperature in the vehicle interior, compares the two, opens the door when the temperature in the vehicle interior is lower, and opens the door from the air inlet into the heat insulating member. Introduce cold air to cool the equipment. In this manner, more appropriate control for opening and closing the door based on the measurement result can be performed, and the temperature rise of the mounted device can be suppressed.

  According to a fourth aspect of the present invention, the open / close door provided on the heat insulating member is made of a shape memory alloy, and the shape is changed at a predetermined temperature to open and close.

  If the opening / closing door is opened and closed using a shape memory alloy instead of the control means, no power is required, so that power consumption can be suppressed.

  The invention according to claim 5 is another invention for solving the problems of the present invention, and in the overhead module case installed near the ceiling of the passenger compartment, a heat insulating member is disposed so as to cover the periphery of the mounted device. In addition, the heat input portion of the heat pipe is arranged close to the mounted device, and the heat is dissipated to the heat radiating portion of the heat pipe arranged outside the overhead module case.

  A heat pipe can be used instead of the cold storage material of claim 1. With the heat pipes close to the device, the heat that enters the overhead module case is guided to the low temperature part of the vehicle and radiated to suppress the temperature rise of the mounted device. Furthermore, the heat from the surroundings is minimized by surrounding the mounted device and the cold storage material with a heat insulating member. As a result, the temperature of the on-board equipment can be maintained below the allowable temperature, and no power is used. Therefore, a low-cost overhead module can be realized with a simple configuration.

  In invention of Claim 6, the cool storage material is arrange | positioned in contact with the thermal radiation part of the said heat pipe.

  If a cold storage material is arrange | positioned in the thermal radiation part of a heat pipe, thermal radiation will be accelerated | stimulated. Therefore, the rise of the temperature rise can be suppressed using this.

  According to a seventh aspect of the present invention, a heat insulating member that covers the periphery of the cold storage material and forms a closed space is provided, and the heat insulating member is provided with an opening / closing door that opens and closes according to the internal and external temperatures.

  The regenerator material arranged in the heat radiating part of the heat pipe is accommodated in the heat insulating member, and for example, the regenerator material can be cooled by opening the door when the air temperature in the passenger compartment is low. As a result, more effective cooling is possible, and the on-board equipment can be kept at a low temperature for a long time when left under the hot sun.

  The invention according to claim 8 is another invention for solving the problems of the present invention, wherein the overhead module case installed in the vicinity of the ceiling portion of the passenger compartment is constituted by a heat radiating member at least partly facing the passenger compartment space. To do. The mounted device in the overhead module case is closely arranged on the heat radiating member, and a heat insulating member is disposed so as to cover the ceiling side of the mounted device.

  Even when left in the sun, paying attention to the fact that the temperature in the vehicle compartment is lower than the temperature on the ceiling side near the vehicle roof and heat flows from the roof side to the vehicle interior side. By adopting a structure that promotes heat radiation to the inside, an increase in temperature of the mounted device can be suppressed. Even in this case, when left under the hot sun, the mounted device can be kept at a low temperature for a long time, and since no power is used, a low-cost overhead module can be realized with a simple configuration.

  The invention according to claim 9 is another invention for solving the problems of the present invention, and in the overhead module case installed in the vicinity of the ceiling portion of the passenger compartment, the heat insulating member is covered so as to cover the ceiling portion side of the mounted device. And a heat radiating member arranged outside the overhead module case and the mounted device are connected by a heat conducting member.

  Instead of making the heat dissipating member a part of the overhead module case, it can be arranged outside the overhead module case. For example, if the heat dissipating member is disposed in the cooler lower compartment space and the heat is dissipated through the heat conducting member, the temperature rise of the mounted device can be more effectively suppressed. Therefore, since the effect of maintaining the temperature of the mounted device below the allowable temperature is high and no power is used, an overhead module with a simple configuration and low cost can be realized.

  The invention according to claim 10 includes a connection member that penetrates through the heat insulating member and connects to the mounted device, and is in close contact with at least a part of the connection member from the through portion to the connection portion. Is arranged.

  An increase in temperature can be suppressed more effectively by disposing the heat dissipating member in close contact with the connecting member and promoting heat dissipation of the connecting member.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a first embodiment of a vehicle overhead module according to the present invention. As shown in FIG. 1 (a), the overhead module according to the present embodiment is mounted in the vicinity of the ceiling of a passenger compartment. A main body (hereinafter referred to as an OHM main body) 1 is provided, and various electronic devices 105 as shown in FIG.

  1A, an OHM main body 1 includes an overhead module case including an outer case 101, a heat insulating case 102, and a heat insulating plate 103, an OHM stay 104, an electronic device 105 accommodated in the overhead module case, and a cold storage material case 107. It consists of the cool storage material 106 hold | maintained inside. In the overhead module case, a heat insulating case 102 having substantially the same shape is fitted and fixed in a container-shaped outer case 101 having an upper end opening, and a heat insulating plate 103 is covered so as to close the openings of the cases 101 and 102. Thus, it is fitted into a hole formed in the lining C2 of the vehicle roof C1, and is fixed to the inner wall surface of the vehicle roof C1 by the OHM stay 104.

  The heat insulating case 102 is installed so as to be in close contact with the inner wall surface of the outer case 101, and the electronic device 105 is accommodated in a sealed space surrounded by the heat insulating case 102 that is a heat insulating member and the heat insulating plate 103. The electronic device 105 housed in the heat insulating case 102 is a device having a low heat-resistant temperature that is not conventionally installed near the ceiling of the passenger compartment. For example, in FIG. 1B, a white line recognition camera 105a and a lens 105b, The camera control circuit 105c, the communication module 105d, and the antenna 105e are arranged in close contact with the heat insulating plate 103.

  By mounting such an electronic device 105 in the OHM main body 1, for example, there is an advantage that the substrate of the communication module 105 d and the antenna 105 e can be integrated and the antenna can be disposed at a position advantageous for communication near the vehicle roof C 1. . The heat insulating case 102 is formed to be slightly shorter in the front-rear direction than the outer case 101, and a device having a high heat resistance temperature (here, the map lamp 108) is placed in the outer case 101 in front of the heat insulating case 102. It is. This is a contrivance for giving the effect to a necessary part for a longer time by limiting the part where the temperature rise suppressing effect by the configuration of the present invention is obtained.

The cool storage material case 107 is a flat sealed case provided in contact with the lower surface of the heat insulating plate 103, and the cool storage material 106 is filled therein. As the cold storage material 106, a conventionally known material can be used. If the type of the regenerator material is a type using sensible heat, water having a large heat capacity per mass is suitable. In addition, there is a type using latent heat, which has a feature that the heat capacity is larger than that of a regenerator material using sensible heat. Specifically, there are inorganic hydrate salt-based and organic compound-based latent heat storage materials, and it is more effective to select the melting point of these latent heat storage materials according to the operating temperature range. For example, when it is desired to keep the OHM temperature below 65 ° C., a material having a melting point of 50-60 ° C., which is a little lower than that, such as sodium acetate hydrate (CH ₃ COONa · 3H ₂ O), Paraffin (CxHy) or the like may be selected.

  The operation of the vehicle overhead module configured as described above will be described. In the case of an overhead module in which conventional heat countermeasures are not taken, the air temperature of the passenger compartment is low due to air conditioning while the vehicle is running, so the overhead module is also kept below the upper limit temperature. However, if the vehicle is left under the hot sun, the roof is heated by the radiant heat of the sun, so that the temperature of the overhead module rises due to the heat from the ceiling and reaches the upper limit temperature of the electronic devices. Therefore, in the present embodiment, the electronic device 105 is accommodated in the OHM main body 1 mounted on the inner side of the vehicle roof C1 in a state surrounded by the heat insulating members (the heat insulating case 102 and the heat insulating plate 103), from the roof C1 side. The heat intrusion can be minimized. Furthermore, since the cool storage material 106 is disposed in close contact with the electronic device 105 inside the heat insulating member, when the temperature inside the heat insulating member rises, the temperature increase of the electronic device 105 can be suppressed by the effect of the cool storage material 106. Thereby, the temperature of the electronic device 105 can be kept below an upper limit temperature (for example, 65 ° C.), and abnormal operation or the like can be prevented.

  In addition, as a power source for the electronic device 105, a second battery 109 disposed in a heat insulating member can be used as shown in FIG. 2 as a second embodiment of the present invention without using a normal vehicle battery. . Here, a second battery 109 is placed between the heat insulating plate 103 and the electronic device 105, on the cool storage material 106 and part of the installation position. Thereby, the power supply at the time of vehicle parking can be ensured easily. Solar cells and other auxiliary power sources can also be used.

  In the first embodiment, as schematically shown in FIG. 3A, a heat insulating case 110 that covers the whole of the cold storage material 106 and the electronic device 105 is provided, and the whole is surrounded by a heat insulating member. The cool storage material 106 and the electronic device 105 may be partially surrounded by a heat insulating member. For example, in 3rd Embodiment shown in FIG.3 (b), the heat insulation case 111 which covers the top surface and side surface of the cool storage material 106 and the electronic device 105 is distribute | arranged, and the heat insulation member is not distribute | arranged to the bottom face side. . Depending on the convenience of mounting the electronic device 105, the heat insulating member can be installed only on the upper side as described above, and the necessary effect can be obtained by covering the vehicle roof C1 side, which tends to be high temperature, with the heat insulating case 111. .

  FIG. 4 shows the effect of the above configuration. In the conventional configuration to which the present invention is not applied, the relationship between the standing time in the hot sun and the temperature in the vicinity of the electronic device 105 (OHM temperature) is shown by a dotted line, and the temperature rapidly increases with the start of the hot standing and exceeds the upper limit temperature. . On the other hand, in the configuration of the present invention using the heat insulating member and the cold storage material 106, the temperature rise in the heat insulating case 102 is suppressed as shown by the solid line. As a result, the time until the temperature reaches the limit temperature can be lengthened, so that the electronic device 105 can be mounted with a simple configuration without using cooling power, etc., and the influence on operation due to being left under the hot sun. Can be suppressed.

  5A and 5B show a fourth embodiment of the present invention. FIG. 5B is a schematic diagram showing a schematic configuration of the vehicle overhead module of the present embodiment. The OHM main body 1 includes a heat insulating case 112 disposed between the vehicle roof C1 and its lining C2, The electronic device 105 mounted in the heat insulation case 112 is included. The heat insulating case 112 covers the entire electronic device 105 to form a sealed space, and has a plurality of opening / closing doors 113 on the front and rear sides of the vehicle. Further, the lining C2 of the vehicle roof as the overhead module case is provided with a plurality of air introduction ports 114 at positions corresponding to the plurality of opening and closing doors 113, and air is introduced near the air introduction ports 114 on the vehicle front side. A fan 115 is installed for circulation. The driving of the plurality of opening / closing doors 113 and the fans 115 is controlled by the control means 2. As a drive source, the second battery 109 shown in FIG. 2 can be installed in the vicinity of the heat insulating case 112.

  The control means 2 maintains the electronic device 105 at a predetermined temperature or less by opening and closing the door 113 according to the temperature inside and outside the heat insulating case 112. For example, when the vehicle travels, the cabin temperature is as low as about 25 ° C. due to air conditioning as shown in FIG. 7, so the door 113 is opened and the fan 115 is turned as shown in FIG. Cooling air is taken into the heat insulating case 112 from 114. Thereby, the flow of cooling air is made in the heat insulating case 112, and the OHM temperature can be maintained at a low temperature. When the vehicle is left, the temperature of the vehicle roof C1 rises due to solar radiation. Therefore, the door 113 is closed to confine the cooling air, and the amount of heat entering from the surroundings is minimized. Due to this effect, even when left under hot weather, it can be maintained at a temperature below the upper limit temperature (for example, 65 ° C.) for a certain period of time.

  As shown in FIG. 6 as a fifth embodiment of the present invention, the door 113 may be made of a shape memory alloy and automatically opened and closed according to a temperature change. In this case, for example, by configuring the door 113 to be closed at 40 ° C. or lower and to be opened at 40 ° C. or higher, an increase in temperature of the electronic device 105 can be effectively suppressed. Furthermore, if the cool storage material used in the said 1st Embodiment is installed in the heat insulation case 112, and the electronic device 105 is mounted on it, a cooling effect will improve more.

  Next, another example of a method for controlling the door 113 by the control means 2 will be described. In FIG. 7, the control method is such that the door 113 is opened while the vehicle is running and the door 113 is closed when the vehicle is parked, but the temperature sensor (OHM temperature) of the electronic device 105 in the heat insulation case 112 is detected by a temperature sensor (not shown). The opening / closing of the door 113 may be controlled by measuring and comparing the vehicle interior temperature (vehicle interior air temperature). This algorithm is shown in FIG. In FIG. 8, first, the OHM temperature To is measured in step 101, the in-vehicle air temperature Tr is measured in step 102, and the measurement results are compared in step 103. If the OHM temperature is high (To> Tr), the routine proceeds to step 104 where the door 113 is opened and the electronic device 105 is cooled. If there is no temperature difference or the air temperature inside the vehicle is high (To ≦ Tr), the door 113 is closed to insulate the heat insulation case 112.

  By doing so, the door 113 is opened and closed according to the temperature, and finer control is possible. For example, if the open / close door 113 is kept closed when the vehicle interior air temperature falls at night, the OHM temperature becomes higher than the vehicle interior air temperature as shown in FIG. Therefore, in order to avoid this, when the air temperature inside the vehicle is low, the door 113 is opened. As a result, the electronic device 105 can be cooled and the OHM temperature can be kept low as shown in FIG.

  11 and 12 show a sixth embodiment of the present invention. FIG. 11 is a schematic diagram showing a schematic configuration of the vehicle overhead module according to the present embodiment. The OHM main body 1 includes a heat insulating case 110 disposed between the vehicle roof C1 and its lining C2, and a heat insulating case 110. It has an electronic device 105 mounted therein. A heat insulating case 110 as an overhead module case covers the entire electronic device 105 and forms a sealed space. In this embodiment, a heat pipe is used for cooling the electronic device 105, and the electronic device 105 is mounted on the heat pipe heat input portion 301 in the heat insulating case 110. The heat of the electronic device 105 is radiated from the heat radiating part installed in the low temperature part of the vehicle via the heat pipe transport part 302.

  Here, the principle of the heat pipe will be briefly described. The heat pipe is a container in which a small amount of liquid (working fluid) is sealed in a sealed container and a capillary structure is provided on the inner wall. When the heat input part 301 of the heat pipe is heated, (1) the working liquid evaporates in the heat input part 301 (absorption of latent heat of evaporation), (2) the steam moves to the heat radiating part which is a low temperature part, and (3) steam A series of phase changes occur in which heat is transferred quickly by condensation of the heat radiation portion (release of latent heat of evaporation) and (4) the condensed liquid recirculates to the heat input portion 301 by capillary action. In this way, the heat pipe is characterized by being able to transport the amount of heat without using power, and is suitably used under special circumstances of the present invention (power cannot be used, there is no low temperature part nearby), and high Shows cooling effect.

  An example of the heat pipe configuration is shown in FIG. FIG. 13A is an example using plate-like and sheet-like heat pipes. Since the heat pipe heat input portion 301 is plate-like, the electronic device 105 can be placed thereon, It can be cooled by conduction. FIG. 13B is an example using a pipe-shaped heat pipe, in which an air-cooling fin 303 is installed on one side of a circular heat pipe to form a heat input section 301. It cools and cools the electronic device 105 indirectly. As the heat pipe transporting section 302, a sheet shape (FIG. 13 (a)) and a circular tube shape (FIG. 13 (b)) that can be easily bent are suitable. In addition, when the transport unit 302 passes through a hot place, it is desirable to install a heat insulating material in order to prevent heat from entering.

The heat radiating part of the heat pipe has the same shape as the heat input part 301. When radiating heat to the vehicle body, a plate shape and a sheet shape are preferable as shown in FIG. When directly dissipating heat to the outside air, air cooling fins 303 may be installed as shown in FIG. The low temperature part of the vehicle where the heat radiating part is installed includes an antenna part 401, a pillar part 402, a fender part 403, a door mirror part 404, and an under floor part 405 (see FIG. 12). An example of the results of measuring the temperature of each part of the vehicle is as follows. Under the conditions of an outside air temperature of 35 ° C. and a solar radiation amount of 1000 W / m ² , the antenna unit 401 (60 ° C.), the pillar unit 402 (70 ° C.), 403 (60 ° C.), door mirror 404 (50 ° C.), and under floor 405 (40 ° C.). The lower the temperature of the low temperature part, the greater the heat transport capability of the heat pipe, so it is better to select the low temperature part according to the required heat dissipation.

  As described above, the electronic device 105 is accommodated in the heat insulating case 110 to minimize the intrusion of heat from the roof C1 side, and the heat is radiated using the heat pipe, thereby suppressing the temperature rise of the electronic device 105. Can do. Therefore, the same effect can be obtained that keeps the temperature of the electronic device 105 at the time of being left in the hot sun below the upper limit temperature (for example, 65 ° C.) and prevents abnormal operation.

  In addition, heat transport capability can be improved by using a self-excited vibration phase change type heat pipe. This self-excited vibration phase change type heat pipe has the characteristics that there is no influence of the mounting posture and the heat transport density is large.

  FIG. 14 shows a seventh embodiment of the present invention. The basic configuration of the vehicle overhead module of the present embodiment is the same as that of the sixth embodiment, and the OHM main body 1 includes a heat insulating case 110 disposed between the vehicle roof C1 and its lining C2, and a heat insulating case. An electronic device 105 mounted in 110 is included. The electronic device 105 is mounted on the heat pipe heat input unit 301 in the heat insulating case 110, and the heat pipe heat input unit 301 is connected to the heat pipe heat radiating unit 304 in the heat insulating case 112 by the heat pipe transport unit 302. Yes. The heat insulating case 112 has the same configuration as that of the fourth embodiment of FIG. 5 described above, covers the entire electronic device 105 to form a sealed space, and has a plurality of doors 113 on the front and rear sides of the vehicle. . The vehicle roof lining C2 is provided with a plurality of air introduction ports 114 at positions corresponding to the plurality of opening and closing doors 113, and in the vicinity of the air introduction port 114 on the vehicle front side, a fan is provided to circulate air. 115 is installed. The driving of the plurality of opening / closing doors 113 and the fan 115 is controlled by a control means (not shown). In the heat insulating case 112, the cold storage material 106 is disposed in close contact with the heat pipe heat radiating unit 304.

  In the above configuration, the control means opens and closes the door 113 according to the temperature inside and outside the heat insulating case 112 to cool the regenerator material 106. By using the cool storage material 106, the heat dissipation effect is enhanced and the rise of the temperature rise is suppressed. Specifically, when the vehicle is running, the temperature in the passenger compartment is as low as about 25 ° C., for example, by air conditioning as shown in FIG. 15, so the door 115 is opened and the fan 115 is turned as shown in FIG. Then, the cooling air is taken into the heat insulating case 112 from the air inlet 114. Thereby, the flow of cooling air is made in the heat insulating case 112, and the regenerator material 106 can be sufficiently cooled. At this time, in the heat insulating case 110, heat that enters from outside the case is radiated from the heat pipe heat radiating part 304 in the heat insulating case 112 to the cold storage material 106 via the heat pipe heat input part 301 and the heat pipe transport part 302. Yes. Therefore, efficient cooling is possible and the electronic device 105 can be maintained at a predetermined temperature or lower.

  On the other hand, when the vehicle is left unattended, the temperature of the vehicle roof C1 rises due to solar radiation. Therefore, as shown in FIG. 14B, the door 113 is closed to confine the cooling air and the amount of heat entering from the surroundings is minimized. Since the cool storage material 106 in the heat insulation case 112 is sufficiently cooled, the heat storage material 106 can absorb the heat that has entered the heat insulation cases 110 and 112. As described above, due to the effects of the heat insulating cases 110 and 112 and the cold storage material 106, even when left under the hot sun, the temperature can be kept below the upper limit temperature (for example, 65 ° C.) for a certain time (see FIG. 15).

  As in the fifth embodiment of FIG. 6, the opening / closing door 113 of the heat insulating case 112 may be made of a shape memory alloy so that it automatically opens and closes according to temperature changes. In this case, for example, by configuring the door 113 to be closed at 40 ° C. or lower and to be opened at 40 ° C. or higher, an increase in temperature of the electronic device 105 can be effectively suppressed.

  Next, another example of the method for controlling the door 113 by the control means will be shown. In FIG. 15, the control method is such that the door 113 is opened while the vehicle is running and the door 113 is closed when the vehicle is parked. However, the temperature of the regenerator material 106 in the heat insulation case 112 (cold regenerator temperature) is not shown. The opening and closing of the door 113 may be controlled by measuring and comparing the vehicle interior temperature (vehicle interior air temperature). This algorithm is shown in FIG. In FIG. 16, first, the regenerator material temperature To is measured in step 201, the in-vehicle air temperature Tr is measured in step 202, and the measurement results are compared in step 203. When the temperature of the regenerator material is high (To> Tr), the process proceeds to step 204 where the door 113 is opened and the regenerator material 106 is cooled. If there is no temperature difference or the air temperature inside the vehicle is high (To ≦ Tr), the door 113 is closed to insulate the heat insulation case 112.

  By doing so, the door 113 is opened and closed according to the temperature, and finer control is possible. For example, if the opening / closing door 113 is kept closed when the in-vehicle air temperature falls at night, the cool storage material temperature becomes higher than the in-vehicle air temperature. Therefore, in order to avoid this, when the air temperature inside the vehicle is low, the door 113 is opened. As a result, the electronic device 105 can be cooled and the OHM temperature can be kept low.

  FIG. 17 shows an eighth embodiment of the present invention. FIG. 17A is a diagram showing a schematic configuration of the vehicle overhead module of the present embodiment. FIG. 17B is a sectional view taken along the line AA, and FIG. 17C is a sectional view taken along the line BB. . FIG. 18 is an in-vehicle view. The OHM main body 1 includes an outer case 101 as an overhead module case, a heat insulating case 501 disposed in the outer case 101, and an electronic device 105 mounted in the heat insulating case 501. The OHM main body 1 is fixed to the rear wall surface of the vehicle roof C1 by a plurality of stays 104 fixed to the upper end opening edge of the outer case 101, and fitted into an opening C21 provided in the lining C2 of the vehicle roof. It protrudes into the passenger compartment C from the opening C21. Therefore, the upper surface of the OHM main body 1 is in contact with the roof inner air A1 between the vehicle roof C1 and the lining C2, and the lower surface of the OHM main body 1 is in contact with the vehicle interior air A2 (see FIG. 18).

  The heat insulating case 501 has a box shape with a lower end opening, is disposed on the lower end surface of the outer case 101 so as to cover the entire electronic device 105, and forms a sealed space therein. The electronic device 105 mounted in the heat insulating case 501 is a device that needs countermeasures against heat. Here, the indoor monitoring camera 105f and the lens 105g are shown as examples. A device having a high heat resistance temperature (for example, the indoor lamp 108 a and the switch 108 b) is disposed outside the heat insulating case 501 in the outer case 101.

  The heat insulating case 501 has an upper surface and side surfaces covered with a heat insulating member 502 (specifically, urethane foam, vacuum heat insulating material, etc.), and blocks the internal electronic device 105 from solar radiation R. On the other hand, a part of the lower end surface of the outer case 101 that forms a sealed space together with the heat insulating case 501 is constituted by a heat radiating plate 505 that is a heat radiating member. The heat radiating plate 505 is specifically made of a metal plate having good thermal conductivity such as an aluminum plate. As shown in FIGS. 17B and 17C, the electronic device 105 and the electronic device are disposed on the heat radiating plate 505. By closely arranging the wiring 504 as a connecting member connected to 105, heat dissipation is improved. At this time, it is desirable to use heat transfer grease or a heat transfer sheet for improving heat conduction. On the other hand, a space is provided between the top surface 503 of the electronic device 105 and the top surface 503 of the heat insulating case 501. The wiring 504 is fixed to the heat radiating plate 505 by a metal fitting 506, and is further led out of the heat insulating case 501 through the grommet 507 and joined to a harness C4 provided inside the vehicle roof C1.

Next, the function and effect of the overhead module of this embodiment will be described. In FIG. 18, when the vehicle C is left under the sun, the upper part of the vehicle C is heated by the energy of solar radiation R (generally said to reach about 1000 W / m ² ). The vehicle interior temperature also rises as the dashboard and the like are heated by solar radiation through the window C3, but the heat is dissipated from the lower surface C5 of the vehicle that is not exposed to solar radiation. Therefore, heat flows from the upper part of the vehicle C toward the lower part. Therefore, the temperature is higher at the upper part of the vehicle C. For example, the roof inner air A1 is 100 ° C., the upper part of the vehicle interior air A2 is 80 ° C., and the lower part of the vehicle interior air A2 is 60 ° C.

  Here, when no heat countermeasure is particularly taken (when the present invention is not configured), the electronic device 105 placed in the OHM main body 1 is directly exposed to the roof inner air A1 and is outside the vehicle interior air A2. It is blocked by case 101. For this reason, the temperature of the electronic device 105 is raised to substantially the same temperature as the roof inside air A1 temperature. For example, even when the upper limit temperature of the electronic device 105 is set to 85 ° C., which is relatively high, the upper limit temperature is exceeded. Become. FIG. 19 shows the temperature rise at this time.

  Next, a case where the configuration of the present embodiment is adopted will be described. In FIG. 17, the heat resistance is large because the heat insulating case 501 covered with the heat insulating member 502 is provided on the upper surface side (the side in contact with the roof inner air A <b> 1) of the electronic device 105. On the other hand, since the heat sink 505 is provided in close contact with the lower surface side of the electronic device 105, the thermal resistance is reduced. Thereby, as shown in FIG. 19, the temperature of the electronic device 105 is reduced to almost the same temperature as the cabin air A <b> 2 with which the heat sink 505 is in contact. Thus, when the configuration of the present invention is used, the temperature rise can be suppressed up to the temperature of the passenger compartment air A2 (for example, 80 ° C.).

  Note that the electronic device 105 requires a wiring 504 for exchanging power and electric signals. In FIG. 17, the wiring 504 exits into the roof inner air A1 atmosphere through the grommet 507, and is connected to a harness C4 provided in the roof. Since the harness C4 is placed directly below the vehicle roof C1, the harness C4 becomes high temperature, and the heat may be transmitted through the wiring 504 and enter the heat insulating case 501 to heat the electronic device 105. As a countermeasure, in this embodiment, the wiring 504 is brought into close contact with the heat radiating plate 505 while the grommet 507 is connected to the electronic device 105, so that heat transmitted through the wiring 504 is radiated to the vehicle interior air A2 through the heat radiating plate 505. ing. Accordingly, heat can be prevented from being transmitted to the electronic device 105 through the wiring 504, and the same effects as those shown in FIG.

  FIG. 20 shows a ninth embodiment of the present invention. For example, when the heat sink 505 cannot be provided immediately below the electronic device 105 due to the design problem of the OHM main body 1 or the arrangement of the internal members, the heat sink 505 can be provided in another part. . For example, as shown in the drawing, a part of the outer case 101 away from the position directly below the electronic device 105 is configured with a heat radiating plate 505a, and the electronic device 105 is connected with a high heat conductive member 508 such as a heat pipe. Good. Furthermore, as shown in FIG. 21 as the tenth embodiment of the present invention, a heat sink 505 can be provided outside the OHM main body 1. In FIG. 21, the heat radiating plate 505 b is arranged at a lower temperature part below the vehicle C and is connected to the electronic device 105 with a high heat conduction member 508 a. In this case, since the heat radiating plate 505b is provided near the lower temperature vehicle lower surface C5, the temperature reduction effect is increased.

  In addition, the heat sink 505 may be provided not only in a part of the OHM main body 1 but also may function as a heat sink by manufacturing the entire outer case 101 of the OHM main body 1 with a high heat conductive member (for example, aluminum). Moreover, although the said embodiment demonstrated the countermeasure against the heat transfer by an electrical wiring, this method is not restricted to an electrical wiring, Any one connected to the electronic devices 105, such as an air piping and an oil piping. You may apply to a member. In addition, in the case where there is a structure in which a member having good heat conduction penetrates the heat insulating member 502 and is connected to a device inside the heat insulating case 501, the same effect can be obtained by the above method. Furthermore, as shown in FIG. 22 as the eleventh embodiment of the present invention, the heat sink 505c for the electronic device 105 is disposed only directly below, and separately from this, the heat sink 505d for the wiring 504 is directly below. It is good also as a structure provided in.

  In the above embodiment, the white line recognition camera 105a and the lens 105b, the camera control circuit 105c, the communication module 105d and the antenna 105e, and the indoor monitoring camera 105f and the lens 105g are shown as the electronic devices 105, but the present invention is not limited thereto. Other communication modules (data communication using mobile phone infrastructure such as ETC, VICS, G-BOOK, car navigation system equipment, etc.), infrared camera for night view, intrusion sensor (with camera) Various devices such as a device that captures an image and recognizes an image, an ultrasonic method, a radio wave method, and a rain sensor can be mounted.

(A) is a whole block diagram of the overhead module which shows the 1st Embodiment of this invention, (b) is principal part sectional drawing of (a). It is a whole block diagram of the overhead module which shows the 2nd Embodiment of this invention. (A) is a schematic block diagram of the overhead module of 1st Embodiment, (b) is a schematic block diagram of the overhead module which shows the 3rd Embodiment of this invention. It is a figure for demonstrating the effect by this invention. FIG. 4 shows a fourth embodiment of the present invention, in which (a) is a schematic configuration diagram of an overhead module when the vehicle is traveling, and (b) is an overhead module when the vehicle is left unattended. It is a schematic block diagram of the overhead module which shows the 5th Embodiment of this invention. It is a figure for demonstrating the effect by this invention. It is a flowchart figure which shows an example of the control in the structure of 5th Embodiment. It is a figure which shows the temperature change when not opening and closing a heat insulation case at the time of leaving. It is a figure which shows the temperature change at the time of opening and closing a heat insulation case at the time of leaving. It is a schematic block diagram of the overhead module which shows the 6th Embodiment of this invention. It is a vehicle mounting view of the overhead module of 6th Embodiment. (A), (b) is a perspective view which shows the heat pipe structural example used in 6th Embodiment. FIG. 9 shows a seventh embodiment of the present invention, where (a) is a schematic configuration diagram of an overhead module when the vehicle is traveling, and (b) is an overhead module when the vehicle is left unattended. It is a figure for demonstrating the effect by this invention. It is a flowchart figure which shows an example of the control in the structure of 7th Embodiment. (A) is the whole block diagram of the overhead module which shows the 8th Embodiment of this invention, (b) is the sectional view on the AA line of (a), (c) is the sectional view on the BB line of (a). It is. It is a vehicle-mounted figure of the overhead module for demonstrating the effect of 8th Embodiment. It is a figure for demonstrating the effect by this invention. It is a schematic block diagram of the overhead module which shows the 9th Embodiment of this invention. It is a schematic block diagram of the overhead module which shows the 10th Embodiment of this invention. It is a partial schematic block diagram of the overhead module which shows the 11th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Overhead module main body 101 Outer case 102 Thermal insulation case (thermal insulation member)
103 Insulation plate (insulation member)
DESCRIPTION OF SYMBOLS 104 Stay 105 Electronic device 106 Cold storage material 2 Control means 301 Heat pipe heat input part 302 Heat pipe transport part 304 Heat pipe heat radiating part 501 Thermal insulation case 502 Thermal insulation member 504 Wiring (connection member)
505 Heat dissipation plate (heat dissipation member)
508 Heat conduction member

Claims (10)

  In the overhead module case installed in the vicinity of the ceiling of the passenger compartment, the cool storage material is disposed close to the mounted device, and the heat insulating member is disposed to cover the periphery of the mounted device and the cool storage material. A vehicle overhead module.   The overhead module case installed in the vicinity of the ceiling of the passenger compartment is provided with an air introduction port communicating with the passenger compartment, and a heat insulating member that covers the periphery of the mounted equipment in the overhead module case and forms a closed space for housing the equipment. An overhead module for a vehicle, characterized in that the thermal insulation member is provided with an opening / closing door that opens and closes according to an internal and external temperature.   The vehicle overhead module according to claim 2, further comprising a control unit that opens and closes an opening / closing door provided on the heat insulating member based on the temperature of the mounted device and the temperature in the vehicle interior.   3. The vehicle overhead module according to claim 2, wherein the opening / closing door provided on the heat insulating member is made of a shape memory alloy so that the shape is changed at a predetermined temperature.   In the overhead module case installed near the ceiling of the passenger compartment, a heat insulating member is disposed so as to cover the periphery of the mounted device, and a heat input portion of the heat pipe is disposed close to the mounted device. A vehicle overhead module characterized in that heat is radiated to a heat radiating portion of a heat pipe disposed outside the module case.   The vehicle overhead module according to claim 5, wherein a cold storage material is disposed in contact with the heat radiating portion of the heat pipe.   The vehicle overhead module according to claim 6, wherein a heat insulating member that covers the periphery of the cold storage material to form a closed space is provided, and the heat insulating member is provided with an open / close door that opens and closes according to the internal and external temperatures.   The overhead module case installed in the vicinity of the ceiling portion of the passenger compartment is configured with at least a part facing the vehicle interior space with a heat radiating member, and the mounted device in the overhead module case is arranged in close contact with the heat radiating member, and An overhead module for a vehicle, wherein a heat insulating member is disposed so as to cover the ceiling portion side of the mounted device.   In the overhead module case installed in the vicinity of the ceiling part of the passenger compartment, a heat insulating member is disposed so as to cover the ceiling part side of the mounted device, and the heat radiating member disposed outside the overhead module case and the mounted device are provided. A vehicle overhead module characterized by being connected by a heat conducting member. A connecting member that penetrates the heat insulating member and connects to the mounted device is provided, and a heat radiating member is disposed in close contact with at least a part of the connecting member from the penetrating portion to the connecting portion. The vehicle overhead module according to any one of 9.

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