JP2014106412A - Outdoor installation housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor installation housing that includes an adiabatic case covering an imaging device and having adiathermancy, and a thermal conduction case covering the adiabatic case and having thermal conductivity, and can further effectively cool the imaging device.SOLUTION: The outdoor installation housing includes: a heat-insulating flow between an imaging device 200 and a first case 101; a heat-conduction flow between the first case 101 and a second case 102; a first fan 105 that feeds air to the heat-insulating flow; and a second fan 106 that guides a part of the air passing through the heat-insulating flow to the heat-conduction flow. The heat-insulating flow causes the air to be fed from the first fan 105 to pass through an electric power source circuit part 204 and the first fan 105 in this order, and the second fan 106 guides the air to be fed from the first fan 105, after passing through the electric power source circuit part 204 and before passing through the first fan 105 to the heat-conduction flow.

Description

  The present invention relates to a housing for outdoor installation that covers an imaging device.

  When the imaging apparatus is installed outdoors, the imaging apparatus may be covered with a sealed housing that cannot easily transfer heat to the outside in order to block rain, moisture, and dust. Also, the outdoor installation housing is required to be heated and cooled to a temperature at which the operation of the imaging apparatus can be guaranteed, assuming that it is installed in a cold region with snowfall or a tropical region exposed to direct sunlight.

  In such a case, generally, a temperature raising / cooling method of the image pickup apparatus using a heater / fan is employed, but it is desirable to keep power consumption at a lower level from the viewpoint of cost and the like.

  In response to the above problems, Patent Document 1 proposes a housing for an electronic device having a two-layer structure. The housing for an electronic device covers the electronic device with a first shell of a heat insulating material, covers the first shell with a second shell of a heat conducting member, and applies a gaseous fluid from the inside of the first shell to the second shell by a fan. And providing heat transfer from the electronic device to the second shell.

  Thereby, when the environmental temperature outside the housing for the electronic device is high, the fan is operated, and the heat generated by the operation of the electronic device is transported out of the housing through the second shell which is a heat conducting member. Further, when the environmental temperature outside the housing is low, the fan is stopped to form an air layer that does not flow between the first shell and the second shell to insulate the electronic device, thereby preventing a temperature drop of the electronic device. be able to.

Special table 2012-507877

  However, in the above conventional example, the air flow in the first shell is generated by the intake of the installed fan and the air that flows between the first shell and the second shell and the flow velocity is attenuated. It consists of things. For this reason, in the heat transfer between the electronic device and the air in the first shell, the air flow in the first shell may not be sufficient.

  In that case, when the external environment temperature is high, the heat of the electronic device is difficult to be transmitted to the air around the electronic device, and thus the cooling performance of the electronic device may be lowered.

  The present invention has been made in view of the above points. That is, a housing for outdoor installation that includes a heat insulating case that covers the image pickup device and has heat insulating properties, and a heat conductive case that covers the heat insulating case and has heat conductivity, and more effectively cools the image pickup device. An outdoor installation housing that can be provided is provided.

  In order to achieve the above object, an outdoor installation housing according to the present invention covers an imaging device and has a heat insulating case, a heat insulating case that covers the heat insulating case and has thermal conductivity, and the imaging device. A heat insulating flow path formed between the heat insulating case, a heat conductive flow path formed between the heat insulating case and the heat conductive case, and a supply means for supplying gas to the heat insulating flow path. A housing for outdoor installation, comprising: guidance means for guiding part of the gas passing through the heat insulation flow path to the heat conduction flow path, wherein the heat insulation flow path is a gas supplied from the supply means Are passed in the order of the power supply circuit section of the imaging device and the supply means, and the guide means is a gas supplied from the supply means and after passing through the power supply circuit section and before passing through the supply means The heat conduction channel And wherein the lead.

  According to the present invention, there is provided a housing for outdoor installation comprising a heat insulating case that covers the image pickup device and has heat insulation, and a heat conduction case that covers the heat insulation case and has heat conductivity. A housing for outdoor installation that can be effectively cooled can be provided.

It is a perspective sectional view of a housing for outdoor installation in a 1st embodiment of the present invention. It is a perspective exploded view of a housing for outdoor installation in a 1st embodiment of the present invention. It is sectional drawing which looked at the housing for outdoor installation from the side surface for demonstrating the flow of the air by the 1st fan in the 1st Embodiment of this invention. It is sectional drawing which looked at the housing for outdoor installations for demonstrating the flow of the air by the 1st fan in the 1st Embodiment of this invention from the front. It is sectional drawing which looked at the housing for outdoor installation from the side surface for demonstrating the flow of the air by the 2nd fan in the 1st Embodiment of this invention. It is sectional drawing which looked at the housing for outdoor installations from the upper surface for demonstrating the flow of the air by the 2nd fan in the 1st Embodiment of this invention. It is sectional drawing which looked at the housing for outdoor installation from the front for demonstrating the heating of the air by the heater in the 1st Embodiment of this invention. It is a perspective sectional view of a housing for outdoor installation in a 2nd embodiment of the present invention. It is sectional drawing which looked at the housing for outdoor installation from the side surface for demonstrating the flow of the air by the 1st fan in the 2nd Embodiment of this invention. It is sectional drawing which looked at the housing for outdoor installation from the side surface for demonstrating the flow of the air by the fan intake passage change valve in the 2nd Embodiment of this invention.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

<First Embodiment>
With reference to FIG. 1 and FIG. 2, the structure of the housing 100 for outdoor installation of an imaging device (hereinafter referred to as the outdoor housing 100) in the first embodiment of the present invention will be described. In addition, the outdoor housing 100 in this embodiment shall be sealed from the external environment.

  The exterior of the outdoor housing 100 is composed of a first case 101, a second case 102, a dome member 103, and a cover member 104. In addition, a first fan 105, a second fan 106, two heaters 107, and an imaging device 200 are accommodated in the outdoor housing 100.

  The imaging apparatus 200 according to the present embodiment is a network camera that includes an imaging unit 203 (described later) that captures an image of a subject and generates a video signal, and can rotate the imaging unit 203 in the pan direction and the tilt direction. It shall be.

  The first case 101 is a heat insulating member made of polycarbonate resin or the like, and is a substantially cylindrical case having one end opened and the other end closed. An outwardly extending rib 101c is provided at the end of the first case 101 on the open side except for a certain section. The first case 101 is provided with an intake hole 101a. Further, the outer periphery of the first case 101 is covered with the second case 102.

  The second case 102 is a heat conducting member made of aluminum die cast or the like, and is a substantially cylindrical case having one end opened and the other end closed. When the first case 101 and the second case 102 are assembled, the contact surface portion 101d on the first case 101 side contacts the contact surface portion 102a on the second case side.

  Note that the first case 101 in this embodiment corresponds to a heat insulating case that covers the imaging device 200 and has heat insulating properties. Further, the second case 102 in the present embodiment covers the first case 101 and corresponds to a heat conduction case having thermal conductivity.

  Then, by assembling the first case 101 and the second case 102, the rib 101 c is disposed so as to cover the gap generated between the first case 101 and the second case 102. Thereby, the small space 302 is formed. The small space 302 is ventilated to the outside of the small space 302 by the intake hole 101a and the exhaust hole 101b formed by the section where the rib 101c of the first case is removed and the inner surface of the second case. Can do.

  The dome member 103 and the cover member 104 are fixed by a method (not shown) and are handled integrally. When the cover member 104 fixed integrally with the dome member 103 is fixed to the open end of the second case 102, the outdoor housing 100 forms a space 301 therein.

  The dome member 103 in the present embodiment is a transparent or translucent plastic resin dome, and is formed in a hemispherical shape. The dome member 103 covers the imaging unit 203. The first fan mounting portion 108 and the bent portion 108a will be described later.

  The imaging device 200 is fixed to the first case 101 with its bottom fixed to the holding member 109. The imaging apparatus 200 includes an imaging unit 203, a power supply circuit unit 204, and a control circuit unit 205. The imaging unit 203 radiates heat from the unit exterior. The power supply circuit unit 204 that supplies power is radiated from the power supply circuit unit radiating member 201, and the control circuit unit 205 for controlling the imaging unit 203 is configured to radiate heat from the control circuit unit radiating member 202. .

  Note that the largest heat generation source of the imaging apparatus 200 in the present embodiment is the power supply circuit unit 204. In addition, the control circuit heat radiating member 202 is made of aluminum die cast or the like, has thermal conductivity, and rotates together with the imaging unit 203 in the pan direction.

  Next, the flow of air generated by the first fan 105 will be described with reference to FIGS. 3 and 4.

  Here, FIG. 3 is a cross-sectional view of the outdoor housing 100 in the present embodiment as viewed from the side, and FIG. 4 is a cross-sectional view of the outdoor housing 100 in the present embodiment as viewed from the front. Note that the arrows in FIGS. 3 and 4 indicate the direction of the air flow generated by the first fan 105. This air flow circulates between the outer surface of the imaging device 200 and the inner surface of the first case 101.

  In addition, the exhaust of the first fan 105 in the present embodiment means an air flow generated by the first fan 105, and the exhaust of the second fan in the present embodiment is the second fan 106. It means the flow of air to be generated.

  As shown in FIGS. 3 and 4, the first fan 105 is installed in the first case 101 in a state of being fixed to the first fan mounting member 108. Specifically, the first fan 105 is arranged so that the exhaust side thereof faces the power supply circuit unit heat radiating member 201. The side opposite to the exhaust side of the first fan 105 is the intake side of the first fan 105.

  The exhaust of the first fan 105 first passes in the vicinity of the power supply circuit unit heat radiation member 201. The power circuit part heat radiating member 201 radiates heat from the power circuit part 204 which is the largest heat generation source.

  When this exhaust passes near the power supply circuit heat radiating member 201, the exhaust of the first fan 105 is forced to flow in a direction other than 108a by the bent portion 108a of the first fan mounting member 108. Thereafter, the exhaust path of the first fan 105 changes its path in the direction of the dome member 103, passes through the vicinity of the heater 107, the control circuit heat radiation member 202, and the imaging unit 203 in order, and reaches the inner surface of the dome member 103.

  The exhaust from the first fan 105 reaches the inner surface of the dome member 103, then flows along the inner surface of the dome member 103, and returns to the intake side of the first fan 105. More specifically, after the exhaust of the first fan 105 reaches the zenith portion of the inner surface of the dome member 103, the inner surface of the dome member 103, the control circuit unit heat radiation member 202, the vicinity of the heater 107, the first fan 105. Passes in the order of the intake side.

  When the first fan 105 is arranged so that the exhaust of the first fan 105 forms such a flow path, when the external environmental temperature of the outdoor housing 100 is high, the imaging device 200 and the first fan 105 are arranged. The temperature of the space 301 inside the case 101 can be made uniform efficiently.

  When the external environment temperature is low, the heat generated by the heater 107 can be transmitted to the imaging device 200 by forced convection heat transfer. Furthermore, it is possible to send the air warmed by the heater 107 to the dome member 103, and thereby the anti-fogging effect of the dome member 103 is also obtained.

  Note that the bent portion 108a in the present embodiment includes air after passing through the second fan 106 and air supplied from the first fan 105 and before passing through the power supply circuit portion 204. It plays the role of a flow path regulating member that regulates merging.

  Subsequently, an air flow generated by the second fan 106 will be described with reference to FIGS. 5 and 6. Here, FIG. 5 is a cross-sectional view of the outdoor housing 100 in the present embodiment as viewed from the side, and FIG. 6 is a cross-sectional view of the outdoor housing 100 in the present embodiment as viewed from the top. The white arrows in FIGS. 5 and 6 indicate the direction of the air flow generated by the second fan 106.

  The second fan 106 is arranged such that the first fan 105 sucks in air after passing through the control circuit unit heat radiation member 202, the imaging unit 203, and the control circuit unit heat radiation member 202 in this order. The air exhausted from the second fan 106 flows in the small space 302 along the inner surface of the second case 102 and returns to the space 301 in the first case 101 from the exhaust hole 101b. It merges with the air flow formed by the fan 105. By disposing the second fan 106 in this way, air to which almost all the heat of the heat generation source of the imaging device 200 has been transmitted flows along the inner surface of the second case 102 that is a heat conducting member. Thus, the imaging apparatus 200 can be efficiently cooled.

  In addition, when the second fan 106 is stopped, an air layer that hardly flows is formed in the small space 302. By this air layer, the external environment of the outdoor housing 100 and the space 301 are thermally insulated, and the heat retaining effect of the space 301 is obtained.

  The second fan 106 is operated or stopped based on the temperature in the first case 101 by a control system (not shown). That is, when the temperature in the first case 101 exceeds the predetermined reference value, the second fan 106 operates (exhausts), and the temperature in the first case 101 falls below the predetermined reference value. The second fan 106 is controlled by this control system to stop.

  Subsequently, heating of air by the heater 107 will be described with reference to FIG. Here, FIG. 7 is a cross-sectional view of the outdoor housing 100 in the present embodiment as seen from the front. 7 indicates the direction of air flow generated by the first fan 105.

  As shown in FIG. 7, the heater 107 is disposed near the exhaust side of the first fan 105 and is disposed near the control circuit unit heat radiation member 202 of the imaging device 200. For example, the exterior of the imaging device 200 includes a member having lower thermal conductivity than each of the power supply circuit unit radiating member 201 and the control circuit unit radiating member 202. It is arranged closer to the heater 107 than a member having low conductivity.

  This member and the heater 107 are arranged closer to the control circuit unit heat radiation member 202 than the heater 107.

  Thereby, the air heated by the heater 107 can be convected around the imaging device 200, and the imaging device 200 can be heated by forced convection heat transfer. Furthermore, since the air can be sent to the dome member 103, fogging can be prevented. Also, with this arrangement, the imaging device 200 can be directly warmed by the heat radiation of the heater 107. In addition, the wavy arrow of FIG. 7 shows the state of this thermal radiation.

  The heater 107 is operated or stopped by a control system (not shown) based on the temperature in the first case 101. When the temperature in the first case 101 exceeds a predetermined reference value, the heater 107 operates (heat generation), and when the temperature in the first case 101 falls below the reference value, the heater 107 stops. In this way, it is controlled by this control system.

  As described above, the housing for outdoor installation of the imaging device having the two-layer structure in this embodiment is based on the heat radiation of the heater 107 and the first fan 105 of the air heated by the heater 107 when the external environment temperature is low. The temperature of the imaging device 200 can be increased by forced convection heat transfer.

  On the other hand, when the external environment temperature is high, the temperature of the air in the imaging apparatus 200 main body and the first case 101 is made uniform by forced convection heat transfer in the first case 101 by the first fan 105. At this time, the flow by the first fan 105 passes through the vicinity of the power supply circuit unit 204 of the image pickup apparatus 200, the vicinity of the image pickup unit 203, and the portion where the amount of heat generation is large, so that the image pickup apparatus 200 can be efficiently cooled. it can.

  Furthermore, the flow switching unit such as the second fan 106 guides the air after taking the heat of the main heat generating part of the imaging device 200 by the first fan to the second case 102, thereby further improving efficiency. In addition, the imaging apparatus 200 can be cooled.

  Further, in the present embodiment, the air supplied from the first fan 105 passes through the heat insulating flow path between the imaging device 200 and the first case 101 having heat insulation properties, the power supply circuit unit 204 of the imaging device 200, The first fan 105 passes in this order. Further, the second fan 106 is the air supplied from the first fan 105, the air after passing through the power supply circuit unit 204 and before passing through the first fan 105, with the first case 101. It guide | induces to the heat conduction flow path between 2nd case 102 which has heat conductivity.

  Thereby, the air supplied from the first fan 105 first takes the heat of the power supply circuit unit 204 which is the largest heat generation source of the imaging device 200. Next, the air heated by the deprived heat is guided by the second fan 106 to the heat conduction flow path before being returned to the first fan 105 and cooled.

  As a result, the outdoor installation housing that includes the first case 101 that covers the imaging device and has heat insulation, and the second case 102 that covers the first case 101 and has thermal conductivity, 200 can be cooled more effectively.

  In the present embodiment, the first fan 105 that mainly stirs the air in the first case 101 passes the air generated by the stirring in the order of the power supply circuit unit 204 of the imaging device 200 and the imaging unit 203 in this order. As shown in FIG. Further, the second fan 106 guides the air after passing through the vicinity of the imaging unit 203 to the second case 102.

  Thereby, the air flow in the 1st case 101 is accelerated | stimulated and the heat transfer efficiency between the imaging device 200 and the air in the 1st case 101 can be raised. Further, in order to further improve the heat transfer efficiency, the exhaust speed of the first fan 105 is considered to be attenuated as the distance from the first fan 105 is increased. The first fan 105 was arranged so that the flow passed. In addition, the heat of the air that has passed is radiated to the outside of the housing by the induction of the second fan 106. As a result, the imaging device 200 can be cooled more efficiently.

  Further, in the present embodiment, the air generated by the first fan 105 using the second fan 106, the intake hole 101a and the exhaust hole 101b provided in the first case 101, and in the vicinity of the imaging unit 203. The air after passing through is guided to the second case 102.

  As a result, the air in the first case 101 is taken in and exhausted to the second case 102, and the air flow in the first case 101 can be further promoted.

  In the present embodiment, the heater 107 is disposed in the vicinity of the control circuit unit heat dissipating member 202 as the heat conducting unit of the imaging apparatus 200. As a result, the temperature of the imaging apparatus 200 can be directly increased using the heat radiation of the heater 107.

  In the present embodiment, the heater 107 is disposed near the exhaust side of the first fan 105. The heat generated by the heater 107 is transferred to the air by convective heat transfer. At this time, heat transfer is promoted as the speed of the air flowing on the surface of the heater 107 increases. Thus, with such an arrangement, the heat generated by the heater 107 can be efficiently transmitted to the air.

  In the present embodiment, the bent portion 108 a is provided so that the exhaust of the first fan 105 passes through at least a part of the periphery of the imaging device 200 and is sucked into the first fan 105. As a result, the exhaust air from the first fan 105 is forcibly directed to the periphery of the imaging device 200, so that the entire air volume of the first fan 105 is heated by the heat of the imaging device 200 and the air around the imaging device 200. Can be used for transmission.

  In the present embodiment, air is used as the fluid passing through the heat insulating flow path and the heat conduction flow path, but the present invention is not limited to this, and a gas other than air may be used. For example, an inert gas such as argon may be used as the fluid that passes through the heat insulating channel and the heat conducting channel.

<Second Embodiment>
With reference to FIG. 8, the structure of the housing 400 for outdoor installation of an imaging device (hereinafter referred to as the outdoor housing 400) in the second embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected about the part which overlaps the above-mentioned 1st Embodiment, and the description is abbreviate | omitted suitably.

  The exterior of the outdoor housing 400 is composed of the first case 101, the second case 102, the dome member 103, and the cover member 104. The outdoor housing 400 houses the first fan 105, the fan intake path change valve 110, the two heaters 107, and the imaging device 200.

  The first case 101 is a heat insulating member made of polycarbonate resin or the like, and is a substantially cylindrical case having one end opened and the other end closed. An outwardly facing rib 101 c is provided at the end of the first case 101 on the open side. Further, the first case 101 is provided with an intake hole 101a and an exhaust hole 101e. Further, the outer periphery of the first case 101 is covered with the second case 102.

  The second case 102 is a heat conducting member made of aluminum die cast or the like, and is a substantially cylindrical case having one end opened and the other end closed. When the first case 101 and the second case 102 are assembled, the contact surface portion 101d on the first case side contacts the contact surface portion 102a on the second case side.

  In addition, the rib 101c is disposed so as to cover the gap generated between the first case 101 and the second case 102. Therefore, the small space 302 is formed by assembling the first case 101 and the second case 102. The small space 302 can be ventilated to the outside of the small space 302 by the intake hole 101a and the exhaust hole 101e.

  The dome member 103 and the cover member 104 are fixed by a method (not shown) and are handled integrally. The cover member 104 fixed integrally with the dome member 103 is fixed to the open end portion of the second case 102, whereby the outdoor housing 400 forms a space 301 therein.

  The imaging device 200 is fixed to the first case 101 with its bottom fixed to the holding member 109. The imaging apparatus 200 includes an imaging unit 203, a power supply circuit unit 204, and a control circuit unit 205. The imaging unit 203 radiates heat from the unit exterior. The power supply circuit unit 204 radiates heat from the power supply circuit unit radiating member 201, and the control circuit unit 205 is configured to radiate heat from the control circuit unit radiating member 202.

  Note that the largest heat generation source of the imaging apparatus 200 in the present embodiment is the power supply circuit unit 204.

  A fan intake path change valve 110 is installed in the exhaust hole 101 e provided in the first case 101. The fan intake passage change valve 110 is a cylindrical valve that is open on one side, and has an opening 110a on a part of the outer peripheral surface of the cylinder. The fan intake passage change valve 110 changes the intake passage of the first fan 105 arranged directly below by a drive mechanism (not shown).

  Specifically, when the opening 110 a and the exhaust hole 101 e are arranged to coincide with each other, the first fan 105 is sucked from the small space 302. Further, when the opening 110 a is arranged toward the inside of the first case 101, the first fan 105 is sucked from the space 301.

  Subsequently, referring to FIG. 9, when the opening 110a is disposed toward the inside of the first case 101 (when the opening 110a is not disposed so as to coincide with the exhaust hole 101e), the first The air flow by the first fan 105 will be described. Here, FIG. 9 is a cross-sectional view of the outdoor housing 400 in this embodiment as viewed from the side.

  The first fan 105 is installed in the first case 101 while being fixed to the first fan mounting member 108. The exhaust of the first fan 105 first passes in the vicinity of the power supply circuit unit heat radiation member 201. The power circuit part heat radiating member 201 radiates heat from the power circuit part 204 which is the largest heat generation source.

  When the exhaust passes through the power supply circuit unit heat radiation member 201, the exhaust of the first fan 105 is forced to flow in a direction other than 108a by the bent portion 108a of the first fan mounting member 108. Thereafter, the flow of the exhaust air from the first fan 105 changes its path in the direction of the dome member 103, passes through the vicinity of the heater 107, the control circuit heat radiation member 202, and the imaging unit 203 in order, and reaches the inner surface of the dome member 103. To do.

  After the exhaust from the first fan 105 reaches the inner surface of the dome member 103, it flows along the inner surface of the dome member 103, passes through the opening 110 a of the fan intake passage change valve 110, and the exhaust of the first fan 105. Return to the intake side. More specifically, after the exhaust of the first fan 105 reaches the zenith portion of the inner surface of the dome member 103, the inner surface of the dome member 103, the control circuit heat radiation member 202, the vicinity of the heater 107, the opening 110 a, Passes in the order of the intake side of one fan 105.

  By arranging the opening 110 a so that the exhaust of the first fan 105 forms such a flow path, the following effects can be obtained without using the second fan 106. That is, when the external environment temperature of the outdoor housing 400 is high, the temperatures of the imaging device 200 and the space 301 inside the first case 101 can be made uniform efficiently.

  Further, when the external environment temperature is low, the heat of the air heated by the heater 107 can be transmitted to the imaging device 200. Furthermore, it is possible to send the air warmed by the heater 107 to the dome member 103, and thereby the anti-fogging effect of the dome member 103 is also obtained.

  In addition, when the opening 110 a is arranged in the first case 101, an air layer that hardly flows is formed in the small space 302. By this air layer, the external environment of the outdoor housing 400 and the space 301 are thermally insulated, and the heat retaining effect of the space 301 is obtained.

  Subsequently, with reference to FIG. 10, when the opening 110 a and the exhaust hole 101 e are arranged so as to coincide (when the opening 110 a is not arranged toward the inside of the first case 101), The flow of air by the first fan 105 will be described. Here, FIG. 10 is a cross-sectional view of the outdoor housing 400 in this embodiment as seen from the side.

  The first fan 105 is installed in the first case 101 while being fixed to the first fan mounting member 108. The exhaust of the first fan 105 first passes in the vicinity of the power supply circuit unit heat radiation member 201.

  When the exhaust passes through the power supply circuit unit heat radiation member 201, the exhaust of the first fan 105 is forced to flow in a direction other than 108a by the bent portion 108a of the first fan mounting member 108. Thereafter, the flow changes its direction in the direction of the dome member 103, and sequentially passes through the vicinity of the control circuit unit heat radiation member 202, the imaging unit 203, and the heater 107 and reaches the inner surface of the dome member 103.

  The exhaust from the first fan 105 reaches the inner surface of the dome member 103 and then flows along the inner surface of the dome member 103. Then, the air flow that flows along the inner surface of the dome member 103 passes through the intake hole 101a due to a pressure difference that occurs because the opening 110a of the fan intake path change valve 110 matches the exhaust hole 101e. To the small space 302.

  The induced air flows in the small space 302 along the inner surface of the second case 102, and flows into the first case 101 from the exhaust hole 101e, and at the same time returns to the intake side of the first fan 105. .

  By arranging the opening 110a in this way, the air to which almost all the heat of the heat source of the imaging device 200 has been transmitted is caused to flow along the inner surface of the second case 102, which is a heat conducting member, The imaging device 200 can be efficiently cooled.

  The fan intake passage change valve 110 is controlled by a control system (not shown) so as to change the direction of the opening 110a with reference to the temperature in the first case 101. That is, when the temperature in the first case 101 exceeds the reference value, the opening 110a is disposed so as to coincide with the exhaust hole 101e, and when the temperature in the first case 101 does not exceed the reference value, the opening 110a is opened. The portion 110a is disposed so as to face the inside of the first case 101.

  Subsequently, heating of air by the heater 107 will be described with reference to FIG. The heater 107 is disposed near the exhaust side of the first fan 105. Further, the control circuit unit radiating member 202 of the imaging device 200 is disposed in the vicinity.

  Thereby, the heat radiation of the air warmed by the heater 107 can be effectively used, and the air can be sent to the dome member 103, thereby preventing fogging. Also, with this arrangement, the imaging device 200 can be directly warmed by the heat radiation of the heater 107.

  The heater 107 is operated or stopped based on the temperature in the first case 101 by a control system (not shown). When the temperature in the first case 101 does not exceed the reference value, the heater 107 is operated. When the temperature in the first case 101 exceeds the reference value, the heater 107 is controlled to stop.

  As described above, in the present embodiment, the fan intake path change valve 110 is air supplied from the first fan 105 and passes through the power supply circuit unit 204 and before passing through the first fan 105. Air is guided to the heat conduction flow path between the first case 101 and the second case 102.

  As a result, the air that has been warmed by removing heat from the power supply circuit unit 204 without using the second fan 106 is guided to the heat conduction channel and cooled before returning to the first fan 105. As a result, the outdoor installation housing in the present embodiment can realize low power consumption and cost reduction, and can cool the imaging device 200 more effectively.

  Further, in the present embodiment, the air generated by the first fan 105 using the fan intake passage change valve 110 and the intake hole 101a and the exhaust hole 101b provided in the first case 101 is in the vicinity of the imaging unit 203. The air after passing through is guided to the second case 102. Thereby, the air in the first case 101 can be guided to the second case 102 and flowed without using the second fan 106.

  In the present embodiment, the fan intake path change valve 110 is arranged so that the first fan 105 is sucked from the second case 102 when the temperature in the first case 101 is higher than the reference value. On the other hand, when the temperature is lower than the reference value, the fan intake path change valve 110 is arranged so that the first case 105 sucks air from the first case 101.

  Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included. Moreover, you may combine suitably a part of embodiment mentioned above.

DESCRIPTION OF SYMBOLS 100 Outdoor installation housing 101 1st case 102 2nd case 105 1st fan 106 2nd fan 200 Imaging device 204 Power supply circuit part

Claims (6)

A heat insulating case that covers the imaging device and has heat insulating properties;
A heat conduction case covering the heat insulation case and having heat conductivity;
A heat insulating channel formed between the imaging device and the heat insulating case;
A heat conduction channel formed between the heat insulation case and the heat conduction case;
Supply means for supplying gas to the heat insulating flow path;
A housing for outdoor installation comprising:
Guiding means for guiding a part of the gas passing through the heat insulating channel to the heat conducting channel;
Have
The adiabatic passage allows the gas supplied from the supply means to pass in the order of the power supply circuit portion of the imaging device and the supply means,
The guide means guides the gas supplied from the supply means after passing through the power supply circuit unit and before passing through the supply means to the heat conduction channel. Housing. The heat insulating channel allows the gas supplied from the supply means to pass in the order of the power supply circuit unit, the imaging unit of the imaging device, and the supply means.
2. The guide unit that guides a gas supplied from the supply unit, which passes through the imaging unit and before passing through the supply unit, to the heat conduction channel. A housing for outdoor installation as described in 1. The heat insulating flow path allows the gas supplied from the supply means to pass in the order of the power supply circuit section, the heat conduction section of the imaging device, the imaging unit, and the supply means.
3. The guide unit that guides a gas supplied from the supply unit, which passes through the imaging unit and before passing through the supply unit, to the heat conduction channel. A housing for outdoor installation as described in 1.   The heat insulation channel allows gas supplied from the supply means to pass in the order of the power supply circuit section, the heat conduction section of the imaging device, the imaging unit, the guiding means, and the supply means. Item 4. The outdoor installation housing according to Item 3.   The gas supplied from the supply unit and having passed through the guiding unit and the gas supplied from the supply unit and having not passed through the power supply circuit unit are merged. The outdoor installation housing according to claim 4, further comprising a flow path restriction portion for restriction. A heat generating means provided on the heat insulating case for heating the imaging device;
The heat insulating channel allows the gas supplied from the supplying unit to pass in the order of the power supply circuit unit, the heat generating unit, the heat conducting unit, the imaging unit, the guiding unit, and the channel regulating unit. The housing for outdoor installation according to claim 5.

Images