KR20040056239A - Adiabatic housing for camera - Google Patents

Abstract

PURPOSE: An adiabatic housing for a camera is provided to effectively cool the camera by using cold nitrogen gas. CONSTITUTION: An adiabatic housing for a camera includes a cooling section(30), and a housing section(10). The cooling section(30) has a thermoelectric device, which heats a part of nitrogen gas and cools a part of nitrogen, a gas cooling pipe through which cold nitrogen gas passes, and a gas heating pipe through which hot nitrogen gas passes. The housing section(10) has a cavity for accommodating the camera(30) therein, an adiabatic member(16) surrounding the cavity and reinforced glass(32) installed at a front portion of the housing section(10). A cooling gas inlet(12) and a cooling gas outlet(14) are formed in the housing section(10). A nitrogen curtain nozzle(34) is installed at an upper end of the reinforced glass(32).

Description

Thermal housing for cameras {Adiabatic housing for camera}

The present invention relates to a thermal insulation housing of a camera used in a high temperature or dust-prone environment, and more particularly, by cooling the nitrogen gas supplied into the housing using the thermal insulation element to cool the camera, It relates to a thermal insulation housing of the camera to protect the camera even in a lot of environments.

In general, cameras are used in various fields that require surveillance. In particular, efforts are being made to enable the monitoring of cameras in a high temperature or dust-prone environment where human eyes are difficult to monitor.

However, in order to enable the camera's surveillance function to operate smoothly in environments with high heat and dust far beyond the operating temperature range of the camera, and to protect the camera from high heat and to allow normal operation, the camera is provided in an insulating housing. Should be protected by

As a conventional technology to protect the camera using the housing as described above, Korean Patent Laid-Open Publication No. 2002-0052108, "Heat Resistant Camera for Electricity Surveillance Camera," has been presented. However, according to the "heat-resistant apparatus of the surveillance camera by electricity", by simply supplying cooling nitrogen gas into the housing to cool the inside of the housing and blowing nitrogen gas by using a fan to prevent dust from adsorbing to the camera lens. .

However, since the housing for the camera of the above configuration is installed in a high temperature environment, it must pass through a long pipe before the nitrogen gas for cooling reaches the housing. Therefore, when the temperature of the nitrogen gas for cooling rises and reaches the housing, the operating temperature of the camera is often exceeded, thereby reducing the monitoring function of the camera.

The present invention has been made to solve the above technical problem, but is supplied to the camera housing to cool the camera, but by cooling the cooling nitrogen gas, the temperature rises during the movement, the camera is cooled by the cooled nitrogen gas It is a technical object of the present invention to provide a thermal insulation housing of a camera that can be cooled more efficiently.

1a, 1b, 1c is a perspective view showing an insulating housing of the camera according to the present invention,

Figure 2a, Figure 2b is a perspective view showing a thermoelectric element constituting the thermal insulation housing of the camera according to the present invention,

2C is a schematic diagram showing an N-P type semiconductor constituting a thermoelectric element;

Figure 3a is a side cross-sectional view showing a heat insulating housing of the camera according to the invention,

Figure 3b is a side cross-sectional view showing the flow of nitrogen gas in the cooling unit according to the present invention.

Explanation of symbols on the main parts of the drawings

10 .. Housing 12 .. Cooling gas inlet

14 .... cooling gas outlet 16 ..... insulation

18..Top piping inlet 20 .... Cooling section

22..Gas supply piping 24 .... Thermoelectric element

25 .... Electrical wiring 26 .... N-P semiconductor

27..Gas cooling piping 28 .... Gas heating piping

30. Camera 32. Tempered glass

34..Nitrogen curtain nozzles 40..Cooling fins

Insulating housing of the camera according to the present invention for solving the technical problem as described above, a thermoelectric element that is part of the cooler for the supplied nitrogen gas, and part of the heating, and the gas cooling piping through which the cooled nitrogen gas passes And a cooling unit including a gas heating pipe through which the heated nitrogen gas passes; A housing portion having an empty space for embedding the camera, a heat insulating material surrounding the empty space, and tempered glass provided on the front surface thereof; A cooling gas inlet and a cooling gas outlet for entering and exiting the cooled nitrogen gas are installed in the housing part, and an upper pipe for moving the heated nitrogen gas is installed between the heat insulators and communicated with the upper pipe. It is characterized in that the nitrogen curtain nozzle is installed on the top of the tempered glass.

In addition, the thermal insulation housing of the camera according to the invention, the temperature sensor is installed inside the housing portion; The controller may further include a controller configured to control the temperature inside the housing by receiving the temperature inside the housing measured by the temperature sensor and adjusting the amount of nitrogen gas supplied and the current supplied to the thermoelectric element.

In addition, the heat insulating housing of the camera according to the present invention is characterized in that the power supply to the camera and the thermoelectric element, and a signal line for the temperature sensor are installed in the gas cooling pipe.

Hereinafter, a preferred embodiment of the heat insulating housing of the camera according to the present invention will be described in detail with reference to the drawings.

Figure 1a shows the interior of the thermal insulation housing of the camera according to the invention, in which the flow of cooling nitrogen gas for cooling the camera 30 is shown by arrows. 1B is a perspective view from the front of the thermal insulation housing of the camera, and FIG. 1C is a perspective view from the rear of the thermal insulation housing of the camera.

As shown, the thermal insulation housing of the camera according to the present invention can be largely divided into a housing portion 10 in which the camera 30 is incorporated, and a cooling portion 20 for cooling nitrogen gas.

The housing part 10, the inside of the empty space so that the camera 30 can be installed therein, to prevent the entry of outside air, and to prevent the heat of the outside to be conducted, the empty space is a heat insulating material (16) Surrounded by) In addition, since the heat insulating material may not be installed on the front surface of the housing part 10 having the lens of the camera 30 so that the camera 30 performs the monitoring function, in order to prevent heat conduction into the housing part 10. It is preferable to use tempered glass 32 having high heat insulating property on the front surface of the housing part 10.

In addition, a nitrogen curtain nozzle 34 is installed on the front surface of the housing part 10, and the nitrogen curtain nozzle 34 ejects nitrogen gas downward, and ejects from the nitrogen curtain nozzle 34 as described above. Nitrogen gas is to prevent the dust is adsorbed on the tempered glass 32 so that the camera 30 can monitor the subject well.

On the other hand, as will be described later in detail, the nitrogen gas supplied to the insulating housing to cool the camera 30, the nitrogen gas heated while passing through the cooling unit 20 provided at the rear end of the housing unit 10 and cooled It is divided into nitrogen gas. Among them, the cooled nitrogen gas enters the housing part 10 through the cooling gas inlet 12 formed at the rear of the housing part 10 to cool the camera 30, and then the front of the housing part 10, or the like. It exits the housing part 10 through the cooling gas outlet 14 formed in the lower surface. Then, the heated nitrogen gas is moved to the housing part 10 through the upper pipe inlet 18 formed on the rear surface of the housing part 10, and then the upper pipe formed between the heat insulating materials 16 of the housing part 10 ( 3A is sprayed through the nitrogen curtain nozzle 34 to prevent the adsorption of dust on the tempered glass 32.

The cooling unit 20 is connected to the rear end of the housing unit 10, and a gas supply pipe 22 for supplying nitrogen gas to the heat insulating housing is installed at the rear surface of the cooling unit 20. Therefore, the nitrogen gas supplied to the heat insulating housing through the gas supply pipe 22 is divided into a heated nitrogen gas and a cooled nitrogen gas while passing through the cooling unit 20, and the cooled nitrogen gas is a camera 30. ), And the heated nitrogen gas serves to prevent the adsorption of dust to the tempered glass (32).

The cooling unit 20 includes a thermoelectric element therein, so that the nitrogen gas supplied as described above can be cooled.

The thermoelectric element utilizes the Peltier effect. The Peltier effect connects two types of metal tips, and when current flows through it, it absorbs heat in one terminal and generates heat in the other terminal. Is a phenomenon causing. By using a semiconductor such as bismuth (Bi) or tellurium (Te) having a different electrical conductivity instead of two kinds of metals, a thermoelectric element (Peltier element) having an efficient endothermic and heat generating action can be obtained. This can be switched between the endothermic and the heat generation in accordance with the direction of the current, and the endothermic and the heat generation amount is adjusted in accordance with the amount of the current, and thus it is applied to a refrigerator having a small capacity or a precise thermostat in the vicinity of room temperature.

Hereinafter, an embodiment of a configuration of a cooling unit that performs the above function will be described in detail with reference to the accompanying drawings.

2A illustrates a thermoelectric device according to the present invention, and FIG. 2B illustrates a configuration of the thermoelectric device. 2C shows an N-P type semiconductor constituting a thermoelectric element.

The thermoelectric element 24 according to the present invention is a device made using the principle that rapid heat movement occurs in the direction of the arrow when heat is applied to the N-P type semiconductor 26 as shown in FIG. 2C. Thus, as shown in FIG. 2A, the thermoelectric element 24 should be connected to an electrical wiring 25 for supplying current. And, as shown in Figure 2b, the thermoelectric element 24 is made up of an array of a number of NP-type semiconductors 26, when the electric wire 12 is applied to the external electrical wires 12, the rapid movement of heat occurs One side cools down and the other warms up.

The present invention makes it possible to continuously transfer heat by attaching cooling fins (see FIG. 3B) to the side to be heated using this characteristic and forcibly cooling the cooling fins with nitrogen gas. This allows the cooling of the lower end of the thermoelectric element 24 (below the arrow in FIG. 2C) to continuously take away the surrounding heat, thus reducing the temperature of the nitrogen gas passing through the lower end of the thermoelectric element. do.

Figure 3a shows a side cross-sectional view of the thermal insulation housing of the camera according to the invention, and Figure 3b shows the flow of nitrogen gas in the cooling section.

As shown, the cooling unit 20 according to the present invention includes a thermoelectric element 24 having the above function in a plurality of layers. At this time, a plurality of thermoelectric elements 24 are provided in each layer, and two opposing thermoelectric elements 24 are configured to form a pair. In addition, a gas cooling pipe 27 through which the cooled nitrogen gas can move is formed inside each pair of thermoelectric elements 24 provided to face each other, and heated nitrogen gas is provided outside the pair of thermoelectric elements 24. A movable gas heating pipe 28 is formed, and a plurality of cooling fins 40 are installed in the gas heating pipe 28. Looking at the operation of the cooling unit 20 having the configuration as described above are as follows.

Nitrogen gas is supplied to the thermal insulation housing of the camera according to the present invention through the gas supply pipe 22 to cool the camera 30, and the supplied nitrogen gas passes through the gas supply pipe 22 and the cooling unit 20. Enter). Then, some nitrogen gas of the nitrogen gas entering the cooling unit 20 is moved to the gas cooling pipe 27 formed by the pair of thermoelectric elements 24, the remaining nitrogen gas is cooled fin 40 The gas heating pipe 28 is moved. However, although nitrogen gas supplied through one supply pipe may be separated in the cooling unit 20 as described above, the nitrogen gas may be configured to be separately supplied to the cooling unit 20 through two supply pipes from the beginning.

As described above, when nitrogen gas passes through the inside and outside of the thermoelectric element 24, when a current is supplied to each thermoelectric element 24, one nitrogen gas is cooled by the Peltier effect and the other Nitrogen gas is heated. That is, the nitrogen gas passing through the gas cooling pipe 27 is deprived of heat and cooled, and the heat moves to the plurality of cooling fins 40 installed in the gas heating pipe 28 through the thermoelectric element 24. The heated cooling fins 40 are cooled again by the nitrogen gas passing through the gas heating pipe 28, so that the nitrogen gas passing through the gas heating pipe 28 is heated.

In addition, the nitrogen gas cooled while passing through the gas cooling pipe 27 enters the inside of the housing part 10 through the cooling gas inlet 12, and the nitrogen gas heated while passing through the gas heating pipe 28 passes upward. It enters the housing part 10 through the piping inlet 18.

3A, the cooled nitrogen gas introduced into the housing part 10 through the cooling gas inlet 12 cools the camera 30 installed in the housing part 10, and then the housing part. It exits the housing part 10 through the cooling gas discharge port 14 installed in the lower surface of 10. On the other hand, the heated nitrogen gas moved to the upper pipe 19 formed between the heat insulators 16 of the housing part 10 through the upper pipe inlet 18 is a nitrogen curtain nozzle provided on the front surface of the housing part 10 ( By spraying 34 to form a nitrogen gas film in the form of a curtain, the dust is prevented from being adsorbed on the tempered glass 32 provided on the front surface of the housing part 10.

Since the cooling unit 20 having the above configuration includes several layers of thermoelectric elements, the cooling unit 20 can instantaneously cool the heated nitrogen gas while moving through the pipe, thereby efficiently cooling the camera 30. It becomes possible.

In addition, a temperature sensor (not shown) is installed inside the housing unit 10, and the temperature inside the housing unit 10 is measured by the temperature sensor, and the measured temperature data is a control unit (not shown) installed outside. Can be configured to be delivered to The controller controls the temperature inside the housing 10 by adjusting the amount of nitrogen gas supplied to the insulating housing and the current supplied to the thermoelectric element 24 using the temperature data inside the housing 10. It is preferable to configure so that it is possible.

When the power supply to the camera 30, the power supply for the thermoelectric element 24, and the signal line for the temperature sensor are exposed to the outside, the power supply may be melted or burned out due to high heat. Therefore, in the present invention, the power supply and the signal line supplied to the camera 30 and the cooling unit 20 are configured to be wired into the piping of the nitrogen gas, for example, the gas cooling piping 27, and the nitrogen into which the power supply and the signal line is drawn in. It is preferable to comprise so that it may be cooled by gas and it may be damaged by high heat.

According to the thermal insulation housing of the camera according to the present invention having the configuration as described above, by cooling the heated nitrogen gas again in the cooling unit 20 while passing through the pipe outside the housing unit 10 more efficient cooling of the camera 30 It is possible to prevent the dust adsorbed to the tempered glass 32 by forming a curtain of nitrogen gas film in front of the tempered glass 32 formed on the front surface of the lens of the camera 30.

Claims (3)

A part of the supplied nitrogen gas is a thermoelectric element 24, part of which cools and partly heats, a gas cooling pipe 27 through which the cooled nitrogen gas passes, and a gas heating pipe through which the heated nitrogen gas passes. A cooling section 30 having a 28; A housing portion (10) having an empty space for embedding the camera (30), a heat insulating material (16) surrounding the empty space, and tempered glass (32) installed on the front surface thereof; A cooling gas inlet 12 and a cooling gas outlet 14 are installed in the housing 10 to allow the cooled nitrogen gas to enter and exit, and the heated nitrogen gas may be moved between the heat insulators 16. Insulation housing for a camera, characterized in that the upper pipe (19) is installed, the nitrogen curtain nozzle 34 in communication with the upper pipe (16) is installed on the top of the tempered glass (32). According to claim 1, wherein a temperature sensor is installed inside the housing (10); Control unit for controlling the temperature inside the housing unit 10 by receiving the temperature inside the housing unit 10 measured by the temperature sensor, by adjusting the amount of nitrogen gas supplied and the current supplied to the thermoelectric element 24 Insulation housing of the camera, characterized in that it further comprises. The thermal insulation of a camera according to claim 1 or 2, wherein a power supply supplied to the camera 30 and the thermoelectric element 24, and a signal line for a temperature sensor are installed in the gas cooling pipe 27. housing.