RU2825564C1 - Outdoor surveillance video camera casing - Google Patents

Abstract

FIELD: outdoor surveillance equipment.

SUBSTANCE: invention relates to equipment for external surveillance, namely to means for its protection against unfavourable external effects. External surveillance video camera housing comprises a closed housing consisting of two parts – a cover and a base, on the base of the housing there is a video camera, a microprocessor control unit containing a microprocessor and a power supply unit connected to it, a front window of the casing made on the front end of the housing, air duct, fan, heater, dust collector in the form of internal parallel partitions rigidly attached alternately to the upper and lower parts of the dust collector body at an angle α equal to 45 degrees, a metal mesh installed opposite the inlet hole of the dust collector. Additionally, on the upper part of the pipe there is a hole through which the pipe communicates with the environment through an additional upper air duct fixed on the upper wall of the casing housing, a fan and a heater are installed inside the air duct, upper hole in the pipe is made at an angle β equal to 45 degrees, and on the lower part of the pipe there are three holes at angles γ1, γ2 and γ3 equal to 60, 45 and 30 degrees, respectively. Inside the dust collector housing is divided by a middle partition into two equal parts, each part consists of three sections interconnected, forming a labyrinth, separated by two parallel horizontal partitions with holes for air passage from opposite sides, inner parallel partitions are rigidly attached alternately to upper and lower partitions in each section of dust collector, the dust collector is detachable; the dust collector housing is connected to the casing housing by means of L-shaped fasteners on the dust collector housing, which are inserted into the corresponding holes in the rear wall of the casing housing.

EFFECT: high efficiency of preventing contamination of protective glass due to high quality of cleaning incoming air.

1 cl, 1 dwg

Description

The invention relates to equipment for outdoor surveillance, namely to means for protecting it from adverse external influences (dust, insects, rain, snow, etc.).

A casing for an outdoor surveillance video camera is known, which prevents contamination of the front window glass, comprising a housing consisting of a base and a cover, inside the housing a video camera, a heater, an air blower, a microprocessor unit are installed, a window is made on the first end of the housing and a pipe is installed on the outside of the window, a filter is installed on the second end of the housing (RU patent No. 2439838, published 10.01.2012).

The disadvantage of the casing is the rapid clogging of the barrier-type air filter, which leads to an increase in the frequency of maintenance of the casing body and the internal equipment of the casing to replace or clean the filter, and, as a consequence, to a decrease in the effectiveness of preventing contamination of the protective glass (dust accumulation, fogging, accumulation of water droplets, snow and icing) due to insufficient air circulation.

Another disadvantage is that the air flow passes inside the casing and makes it leaky, which is highly undesirable for outdoor equipment. Despite the presence of an air filter in the casing design, dust particles and excess moisture will inevitably get inside, which will lead to their settling on the inner surface of the casing itself, on electronic equipment, boards, the inner side of the casing glass and even the optical glass of the camera. This can reduce the transparency of the glass, the quality of the camera and even disable the equipment, not to mention the need for more frequent and expensive maintenance.

A casing for an outdoor surveillance video camera is known, comprising a closed housing consisting of a cover and a base, a video camera is mounted on the base of the housing, the front end of the housing has an optical window opening into a tube made in the form of a pipe of arbitrary cross-section, the inner walls of which form the boundaries of the video camera's visibility zone, wherein the lower or side part of said tube is provided with at least one opening through which the rear part of the tube closest to the housing communicates with the external environment through an air duct fixed on the lower or side wall of the housing, wherein an air pumping element is installed inside the air duct to create excess pressure inside the tube, a temperature sensor and a fan. An air filter is installed in the rear part of the air duct (RU patent No. 2573426, published on 20.01.2016).

The disadvantages of this casing are:

- low efficiency of cleaning atmospheric air from mechanical impurities and excess moisture due to rapid clogging of the filter and wetting, freezing, which reduces the flow of air for blowing, reduces the period between repairs;

- low efficiency of the air flow exiting the blower at an angle of 90 degrees to the tube (pipe), which reduces the efficiency of glass protection and blowing out dust and debris from the tube (pipe).

The closest technical solution is a casing for an outdoor surveillance video camera, comprising a closed housing consisting of two parts - a cover and a base, a video camera, a microprocessor control unit containing a microprocessor and a power supply unit connected to it are mounted on the base of the housing, a front window of the casing is made on the front end of the housing, consisting of a frame and transparent glass attached to it, a pipe is installed on the outside of the glass, the inner walls of which form the boundaries of the visibility zone of the video camera, while in the lower part of the pipe there are openings through which the pipe communicates with the external environment through an air duct, a fan and a heater are installed inside the air duct, and at the inlet of the air duct a dust collector is placed in the form of internal parallel partitions rigidly attached alternately to the upper and lower parts of the dust collector housing at an angle α equal to 45 degrees, while on the end of the rear part of the dust collector in the inlet opening a metal mesh is installed (patent RU No. 2790180, published. 15.02.2023). The air duct is fixed to the lower wall of the casing body. The dust collector is placed inside the air duct in its rear part, the internal parallel partitions of the dust collector are rigidly attached alternately to the upper and lower parts of the air duct body at an angle α equal to 45 degrees, a protective visor is installed outside above the dust collector inlet. In the lower part of the pipe, two openings are made at an angle β equal to 45 degrees, ensuring the direction of the air flow to the center of the protective glass and to the outer open part of the pipe.

The disadvantages of this casing are:

- low efficiency of heated air supply through one air duct located in the lower wall of the casing body, due to simultaneous blowing of transparent glass and the open outer part of the pipe, reducing the air flow rates;

- increased risk of condensation forming on the transparent glass inside the housing due to heat penetration from the heater installed in the air duct located in the lower wall of the casing housing;

- low quality of cleaning of incoming air from mechanical impurities by one section of internal parallel partitions (dust collector);

- the complexity and duration of the dust collector cleaning process due to its placement in the air duct, which requires stopping the operation of the device and its complete disassembly.

The technical results of the invention are an increase in the efficiency of preventing contamination of the protective glass (dust accumulation, fogging, accumulation of water droplets, snow and icing) by improving the quality of cleaning the incoming air, increasing the air supply, simplifying and reducing the time of the dust collector cleaning process and increasing the period between repairs for the casing, as well as expanding the arsenal of technical means for protecting outdoor surveillance cameras from adverse external influences.

The technical results are achieved by a casing of an outdoor surveillance video camera, containing a closed housing consisting of two parts - a cover and a base, on the base of the housing there are installed a video camera, a microprocessor control unit containing a microprocessor and a power supply unit connected to it, a front window of the casing made on the front end of the housing, consisting of a frame and transparent glass attached to it, a pipe installed on the outside of the glass, the inner walls of which form the boundaries of the visibility zone of the video camera, openings made in the lower part of the pipe, an air duct, a fan, a heater, a dust collector in the form of internal parallel partitions rigidly attached alternately to the upper and lower parts of the dust collector housing at an angle α equal to 45 degrees, a metal mesh installed opposite the inlet opening of the dust collector.

What is new is that an additional opening is made on the upper part of the pipe, through which the pipe communicates with the external environment through an additional upper air duct fixed to the upper wall of the casing body, a fan and a heater are installed inside the air duct, the upper opening in the pipe is made at an angle β equal to 45 degrees, ensuring the direction of the air flow to the center of the protective glass, and three openings are made on the lower part of the pipe at angles γ1, γ2 and γ3 equal to 60, 45 and 30 degrees, respectively, ensuring the direction of the air flow to the outer open part of the pipe and communicating with the external environment through the lower air duct containing a fan, and the dust collector consists of a housing, on one side of the housing in the center there is an inlet opening, on the opposite side there are two openings communicating the dust collector with the air ducts, inside the dust collector body is divided by a middle partition into two equal parts, each part consists of three sections communicating with each other, forming a labyrinth, separated by two parallel horizontal partitions with openings for air passage from opposite sides, internal parallel partitions are rigidly attached alternately to the upper and lower partitions in each section of the dust collector, the dust collector is removable, the dust collector body is connected to the casing body using L-shaped fasteners on the dust collector body, inserted into the corresponding holes in the rear wall of the casing body, a sealing rubber ring is installed at the inlet of each air duct.

Fig. 1 shows a diagram of the housing of an outdoor surveillance video camera, side view.

The housing of the outdoor surveillance video camera comprises a body 1, a body cover 2, a body base 3, a video camera 4, a microprocessor control unit 5, a frame 6, a transparent protective glass 7, a pipe 8, lower openings 9, a lower air duct 10, a fan 11, a dust collector 12, partitions 13, an upper opening 14, an upper air duct 15, a fan 16, a heater 17, fastenings on the body of the dust collector 18, openings 19 in the rear wall of the body of the housing, sealing rubber rings 20, an inlet opening 21, a metal mesh 22, sockets 23, a middle partition 24, partitions 25 with openings 26.

The housing of the outdoor surveillance video camera comprises a closed body 1 (Fig. 1) consisting of two parts - a cover 2 and a base 3, on the base of the body a video camera 4, a microprocessor control unit 5 containing a microprocessor and a power supply unit connected to it (not shown in the figure), a front window of the housing made on the front end of the body 1, consisting of a frame 6 and transparent glass 7 attached to it, a pipe 8 installed on the outside of the glass, the inner walls of which form the boundaries of the visibility zone of the video camera 4, openings 9 made in the lower part of the pipe 8, an air duct 10, a fan 11, a heater 17, a dust collector 12 in the form of internal parallel partitions 13, rigidly attached alternately to the upper and lower parts of the dust collector body by spot welding at an angle α equal to 45 degrees, a metal mesh 22 installed opposite the inlet dust collector 12. Partitions 13 are made of metal, have a thickness of 1.5 mm and a length such that there is space for air to pass between the partition and the opposite side of the dust collector (from the one to which it is attached), for example 4-5 mm. The distance between partitions 13 is 10 mm.

All the main parts of the casing (housing 1, pipe 8, air ducts 10 and 15, as well as dust collector 12) are connected to each other by hinges and screws (not shown in the figure).

Additionally, an opening 14 is made on the upper part of the pipe 8, through which the pipe 8 communicates with the external environment through an additional upper air duct 15, fixed on the upper wall of the casing body 1. A fan 16 and a heater 17 are installed inside the upper air duct 15. Placing the heater 17 only in the upper air duct 15 makes it possible to exclude the formation of condensate inside the casing body 1. The upper opening 14 in the pipe 8 is made at an angle β equal to 45 degrees, ensuring the direction of the air flow supply to the center of the protective glass. On the lower part of the pipe 8, three lower openings 9 are made at angles γ1, γ2 and γ3 equal to 60, 45 and 30 degrees, respectively, ensuring the direction of the air flow supply to the outer open part of the pipe 8 and communicating with the external air environment through the lower air duct 10, containing a fan 11.

The power of fan 11 in the lower air duct 10 is not less than twice as great as the power of fan 16 in the upper air duct 15. The different power of fans 11 and 16 ensures the most optimal circulation of air flows inside pipe 8, taking into account the different number of openings in the lower and upper parts of pipe 8. Air flows supplied under increased pressure created by fan 11 prevent pipe 8 from filling with dirt, snow, frost, moisture, dust and their getting onto transparent glass 7 even in strong gusts of wind.

The sockets 23 on the openings 9 and 14 allow air to be directed to the open part of the pipe 8 and to the glass 7, respectively, and are made of plastic and are attached to the inner surface of the pipe 8 using adhesive fastener.

The casing body 1 is made of metal of a round shape or semicircular cross-section, in which case the base is made flat. The pipe 8 is made of metal or plastic of a round cross-section. Air ducts 10 and 15 are made of metal, have a trapezoidal cross-section. All parts are connected to each other by hinges and screws (not shown in the figure).

The dust collector 12 consists of a removable body. On one side of the body, in the center, there is an inlet opening 21, on the opposite side there are two openings connecting the dust collector with air ducts 10 and 15. Inside, the body of the dust collector 12 is divided by a middle partition 24 into two equal parts - upper and lower. Each part consists of three sections communicating with each other, forming a labyrinth, divided by two parallel horizontal partitions 25 with openings 26 for the passage of air from opposite sides. Internal parallel partitions 13 are rigidly attached alternately to the upper and lower partitions in each section of the dust collector. This design of the dust collector ensures an increase in the quality of cleaning the incoming air. The dust collector 12 is removable. The dust collector body is connected to the housing body 1 by means of L-shaped fasteners 18 on the dust collector body 12, inserted into the corresponding openings 19 in the rear wall of the housing body 1. A sealing rubber ring 20 is installed at the inlet of each air duct 10 and 15. The design of the dust collector ensures its quick removal and high-quality cleaning of its inner surface.

The inlet opening 21 is made with a height that ensures air flow into the lower section of the upper part of the dust collector body 12 and into the upper section of the lower part of the dust collector body 12 and flow through the labyrinth into the upper air duct 15 and the lower air duct 10, respectively. A metal mesh 22 is installed on the end of the rear part of the dust collector 12 opposite the inlet openings 21. The metal mesh 22 is made of 1 mm thick stainless wire with a cell size of 0.5 mm, inserted into the openings 21 and secured to the outside of the dust collector 12 using screws and clamps (not shown in the figure).

The sealing rubber rings 20 are made, for example, of silicone or fluorosilicone rubber, which ensures elasticity, including for low temperatures, typical for the operating conditions of the protective casing. The rings 20 are inserted into the corresponding openings in the dust collector 12 (not indicated in the diagram), are fixed with air ducts 10 and 15 during the assembly of the casing and ensure the tightness of the connection to prevent the ingress of air with mechanical impurities bypassing the dust collector 12.

The proposed design of the dust collector, air ducts and pipe, as well as their placement in the protective casing of the outdoor surveillance video camera, improves the quality of incoming air cleaning, increases air supply by two air ducts, and, as a result, increases the efficiency of preventing contamination of the protective glass (dust accumulation, fogging, accumulation of water droplets, snow and icing). The design of the removable dust collector simplifies the cleaning process and reduces the cleaning time, which allows increasing the inter-repair period of the casing.

The device operates in the following sequence.

The air from the environment enters the dust collector 12 through the metal mesh 22 and the inlet 21, thanks to the fans 11, 16, creating a pressure difference, while the air flow in the upper air duct 15 is heated, passing through the heater 17. The flow of heated air, forming a spray cone supplied under increased pressure created by the fan 16, prevents fogging and icing of the glass 7. The heated air hitting the center of the protective glass 7 directly allows for maximum prevention of its fogging or icing, the angle of 45 degrees and the bell 23 allow for uniform flow and distribution of the air flow over the entire surface of the glass 7.

The air flow entering through the lower air duct 10 and the lower openings 9 with sockets 23 directly into the center of the outlet opening of the pipe 8 allows to maximally exclude the ingress of dust, debris, insects, dirt and sediment into the pipe 8, angles of 60, 45 and 30 degrees allow to ensure uniform flow of air into the center of the outlet opening of the pipe 8 and distribution over the entire circumference of the opening.

When the air flow collides and turns in the dust collector 12, due to the presence of internal vertical partitions 13, mechanical impurities, dust, insects and small debris are deposited on the lower part of the gravity cleaning unit between the partitions. The execution of partitions 13 at an angle of α - 45 degrees allows for the gradual accumulation of dust and small particles in the space between the partitions 13 and the dust collector 12, which eliminates its rapid clogging, and also prevents the circulation of dust and small particles with their entry into the air ducts 10, 15. Metal mesh 22 prevents large debris and insects from entering the casing.

The components of the dust collector 12 are connected with screws (not shown in the figure); to clean the dust collector 12, the L-shaped fasteners 18 are removed from the corresponding openings 19 in the rear wall of the housing 1 for cleaning in a special area; a replaceable dust collector is installed in its place.

Thus, the proposed design of the protective casing of the outdoor surveillance video camera provides an increase in the quality of cleaning the incoming air and its supply, optimization of the dust collector cleaning process with a reduction in the cleaning operation in comparison with the prototype by at least 5 times, an increase in the inter-repair period of the casing operation between servicing the casing in comparison with the prototype by at least 25%, which increases the efficiency of preventing contamination of the protective glass of the case (dust accumulation, fogging, accumulation of water droplets, snow, insects and icing). The arsenal of technical means of protecting outdoor surveillance video cameras from adverse external influences is also expanded.

Claims (1)

A housing for an outdoor surveillance video camera, comprising a closed housing consisting of two parts - a cover and a base, on the base of the housing there are mounted a video camera, a microprocessor control unit containing a microprocessor and a power supply unit connected to it, a front window of the housing made on the front end of the housing, consisting of a frame and transparent glass attached to it, a pipe installed on the outside of the glass, the inner walls of which form the boundaries of the visibility zone of the video camera, openings made in the lower part of the pipe, an air duct, a fan, a heater, a dust collector in the form of internal parallel partitions rigidly attached alternately to the upper and lower parts of the dust collector housing at an angle α equal to 45 degrees, a metal mesh installed opposite the inlet opening of the dust collector, characterized in that an opening is additionally made on the upper part of the pipe through which the pipe communicates with the external environment through an additional upper air duct fixed to the upper wall of the housing, a fan and a heater are installed inside the air duct, the upper opening in the pipe is made at an angle β equal to 45 degrees, providing the direction of the air flow to the center of the protective glass, and on the lower part of the pipe there are three openings at angles γ1, γ2 and γ3 equal to 60, 45 and 30 degrees, respectively, providing the direction of the air flow to the outer open part of the pipe and communicating with the external environment through the lower air duct containing a fan, and the dust collector consists of a housing, on one side of the housing in the center there is an inlet opening, on the opposite side there are two openings communicating the dust collector with the air ducts, inside the dust collector housing is divided by a middle partition into two equal parts, each part consists of three sections communicating with each other, forming a labyrinth, separated by two parallel horizontal partitions with openings for air passage from opposite sides, the internal parallel partitions are rigidly attached alternately to the upper and lower partitions in each section of the dust collector, the dust collector is made removable, the dust collector housing is connected to the housing casing using L-shaped fasteners on the dust collector body, inserted into the corresponding holes in the rear wall of the casing body; a sealing rubber ring is installed at the inlet of each air duct.