BG66607B1 - A telecommunications cabinet with a built-in thermal chamber - Google Patents

Abstract

The telecommunications cabinet with a built-in thermal chamber is suitable to operate in the open. It is intended for network operators of mobile and fixed telecommunications services. It provides for optimal environment for the telecommunications equipment and accumulator batteries in an environment of temperatures from -40?C to +70?C. The built-in chamber (2) keeps a stable and optimal temperature for the accumulator batteries (1) built inside and intended to stand-by the power of the telecommunication equipment thereby securing the capacity and maximum life of batteries. The air conditioner (3) in the thermal chamber is powered by a 48V constant voltage. Its power is secured by the batteries and in case of outside power cut from the mains it continues operation. The built-in air conditioner in the thermal chamber is constructed on semi-conductor elements (5). No filters, no compressor, no freon are employed. The air conditioner is light- weight and no servicing is needed, it is noiseless and does not cause vibrations. The air conditioner cools and heats the space of the thermal chamber.

Description

(54) CABINET FOR TELECOMMUNICATION EQUIPMENT WITH BUILT-IN THERMAL CHAMBER (57) The invention finds application in the field of telecommunications, where it is necessary for the elements of the telecommunication equipment to be located in cabinets of open, unprotected outdoor spaces. The cabinet for telecommunication equipment is a metal structure made of single or double walls (1), inside which a thermal chamber (2) is mounted. The cabinet is equipped with at least one air exchange fan (3) mounted to one of the walls (1) of the cabinet to the space above the thermal chamber (2). Rechargeable batteries (4) are installed in the thermal chamber (2). The internal volume of the thermal chamber (2) is closed and no exchange of

66607 Bl air with external environment of the thermal chamber (2). On one of the walls of the thermal chamber (2) is mounted an air conditioner (5), which consists of a semiconductor element (6) located between the outdoor (7) and indoor heat-conducting body (8). The external heat-conducting body (7) is located outside the thermal chamber (2), and the internal heat-conducting body (8) - inside the thermal chamber (2). On each of the heat-conducting bodies (7 and 8) are mounted fans - external (9) and internal (10) - in relation to the thermal chamber (2).

claims, 2 figures

66607 Bl (54) CABINET FOR TELECOMMUNICATION EQUIPMENT WITH BUILT-IN THERMAL CAMERA

Field of technology

The present invention finds application in the field of telecommunications. It is used by telecommunication service operators where it is necessary for the telecommunication equipment (control devices, control modules, power supply, accumulator batteries, other electronics) to be located in cabinets of open, unprotected outdoor spaces.

BACKGROUND OF THE INVENTION

To cover a certain area with a radio signal, telecommunications operators use transceiver antennas that are installed outdoors. The antennas are suitable for outdoor use. The accompanying electronic equipment and rechargeable batteries are not suitable for outdoor use. For this they are placed in cabinets for outdoor use.

The equipment located in the cabinet emits heat during its operation. The high temperature as well as the constant temperature fluctuations lead to extremely unfavorable consequences for the rechargeable batteries. Their optimal factory characteristics (capacity and life) are achieved only at a constant temperature of about 23 ° C. Therefore, it is extremely important that the batteries are in a constant temperature environment as close as possible to that prescribed by the manufacturer.

There are several known ways to maintain the operating temperature in cabinets for outdoor use.

One way is by using a standard air conditioner with a compressor and coolant. A limiting factor in this case is that standard air conditioners operate in a certain range of outdoor temperature, most often in the range from -10 ° C to + 45 ° C, in rare cases up to + 55 ° C. Another disadvantage is that they need regular maintenance - replacement of filters, refilling with freon, inspection of the compressor and connections. Another limiting factor is that they operate with an alternating voltage of 220 V and in the absence of power supply from the external network, the air conditioner stops working. During operation, standard air conditioners emit noise and vibration, which limits their ability to be located near residential buildings.

The second way to regulate the temperature inside the cabinet is through the use of passive heat exchangers. They operate at 48 V DC and have a basic auxiliary function. They are used for redundancy when the 220 VAC external power supply fails and the standard air conditioner stops working. These heat exchangers are able to take part of the temperature, but only if the heat output from the equipment in the cabinet is very small. The main disadvantage is that they are not able to lower the temperature degrees in a closed volume to levels lower than those of the outside ambient temperature. The prescribed temperature for the batteries can only be achieved when the ambient air temperature outside the cabinet is lower than 23 ° C.

The third way to regulate the temperature inside the cabinet is through the use of outside air. With the help of fans, a forced air flow is created and directed, which takes the high temperature from the heated components in the cabinet. This method of temperature control maintains a certain overheating of the inner environment of the cabinet compared to the outer one. This overheating is in the range of 5 ° C to 10 ° C relative to the outside temperature. This method ensures that the temperature is maintained for the proper functioning of the electronics and equipment in the cabinet within appropriate limits. However, with regard to rechargeable batteries, this method of temperature regulation is detrimental.

A cabinet with a cooling system for telecommunication equipment is also known, whose internal space is divided into two parts, as the components that radiate more heat are installed in the first space of the cabinet, and those that emit less heat are installed in the second hermetically sealed cabinet space (WO 9619046).

The first space is fitted with a fan and is cooled by circulating air which enters the cabinet from the environment and which passes through ducts or pipes,

66607 Bl mounted to or around heat-emitting components. In the first space there is also a heat exchanger connected by a pipe to a fan mounted in the second space, and by means of a second pipe the heat exchanger is connected to the inside of the second space of the cabinet. The air circulating through the heat exchanger moves in countercurrent to the movement of air in the first space.

The famous cabinet with a cooling system for telecommunication equipment has a relatively complex construction, requiring time and resources for maintenance and prevention.

Technical essence of the invention

It is an object of the invention to provide a cabinet for telecommunication equipment with a built-in thermal camera, providing a suitable operating temperature range of communication and other equipment installed in it, the maintenance of which in terms of time and means to be greatly simplified and reduced.

This task is solved by a cabinet for telecommunication equipment, which is equipped with at least one air exchange fan. According to the invention, the cabinet for telecommunication equipment is a metal structure made of single or double walls, and a closed thermal chamber is mounted inside the cabinet for telecommunication equipment. The air exchange fan itself is mounted to one of the walls of the cabinet in the space above the thermal chamber.

The thermal chamber of the cabinet for telecommunication equipment is made of heat-insulating walls and includes an air conditioner mounted in one of the walls of the thermal chamber (in this case the upper one) and of fans - external and internal, located next to the air conditioner.

The air conditioner consists of at least two heat-conducting bodies connected to each other by means of a semiconductor element located between the heat-conducting bodies mounted to one of the thermal insulating walls of the thermal chamber.

Each of the heat-conducting bodies is made in the form of a radiator with fins.

The heat-conducting bodies are mounted on one of the heat-insulating walls of the thermal chamber, at least one of the heat-conducting bodies being mounted inside the thermal chamber and at least one of the heat-conducting bodies being mounted outside the thermal chamber.

This solution solves the problem of providing an appropriate operating temperature range for the communication equipment located in the cabinet, as well as achieving and maintaining ideal temperature conditions for the batteries located in the thermal chamber at any time, thus guaranteeing their life and capacity. The communication cabinet is designed so that it can be operated in the range of ambient temperature from -40 ° С to + 70 ° С.

Another advantage of the telecommunication equipment cabinet is that the air conditioner is supplied with 48 V DC voltage from the accumulator batteries, which reserve the entire power supply of the telecommunication equipment. When the external 220 VAC power supply is not disconnected from the mains, the air conditioner continues to function and maintain the optimum constant temperature for the batteries.

It is also an advantage that the maintenance of the cooling system of the telecommunication cabinet is reduced to zero. Unlike the standard air conditioner, no filters are used here, as there is no circulation and exchange of air with the external environment of the camera - no compressor, no freon, no noise and vibration.

Explanation of the attached figures

An exemplary embodiment of the invention is shown in the attached figures, where:

Figure 1 shows a front view of the telecommunication equipment cabinet with the built-in thermal camera, and Figure 2 shows a view of the thermal chamber from the telecommunication equipment cabinet.

An exemplary embodiment of the invention

The cabinet for telecommunication equipment with the built-in thermal chamber is a metal construction made of single or double walls 1, as the thermal chamber 2 is mounted inside the cabinet - figure 1. Inside the cabinet are mounted the individual components of telecommunication equipment - not shown in the attached figure. .

The cabinet for telecommunication equipment

66607 Bl is equipped with at least one air exchange fan 3 mounted to one of the walls 1 of the cabinet to the space above the thermal chamber 2. The cooling of the components of the telecommunication equipment is performed by forced air circulation inside the cabinet and air exchange with the environment. with the help of the air exchange fan 3. The heating, when necessary, is performed by a heater - not shown in the figure.

As already noted in the lower part of the cabinet is mounted the thermal chamber 2, the walls of which are made of thermal insulation material. Batteries 4 are installed in the thermal chamber 2 - figure 1. The internal volume of the thermal chamber 2 is closed and no air is exchanged with the external environment of the thermal chamber 2.

On one of the walls of the thermal chamber 2, in this case the upper one, an air conditioner 5 is mounted. The air conditioner 5 is composed of a semiconductor element 6 located between the outdoor 7 and the inner heat conductive body 8. The outer heat conductive body 7 is located outside the thermal chamber 2 and the inner heat conductive body 8 - inside the thermal chamber 2. The connection between the two heat-conducting bodies 7 and 8 is made by the semiconductor element 6. The semiconductor element 6 itself is mounted in an opening made in the upper wall of the thermal chamber 2.

By means of mounting elements on each of the heat-conducting bodies 7 and 8 are mounted fans - external 9 and internal 10 with respect to the thermal chamber 2.

The indoor 8 and the outer 7 heat conductive body are blown with air respectively by means of the inner 10 and the outer 9 fans located around or directly on the heat conductive bodies 7 and 8, so that the air flow completely flows around the heat conductive bodies 7 and 8.

The inner volume of the thermal chamber 2 is closed and there is no exchange of air with the external environment for the thermal chamber 2. When the temperature in the thermal chamber 2 rises above the set limit, the air conditioner 5 begins to cool. When the temperature in the thermal chamber 2 drops below the set limit, the air conditioner 5 starts to heat the thermal chamber 2. In this way the optimal constant temperature is maintained for the accumulator batteries 4 located in the thermal chamber 2.

The air conditioner 5 built into the thermal chamber 2 is supplied with 48 V DC voltage. Its power supply is backed up by the batteries 4 and in the absence of external power supply from the network it continues to function.

Claims (5)

A cabinet for telecommunication equipment with a built-in thermal camera, which is equipped with at least one air exchange fan, characterized in that - the cabinet for telecommunications equipment is a metal structure made up of single or double walls (1), - a closed thermal chamber (2) is installed inside the cabinet for telecommunication equipment, - in which the air exchange fan (3) is mounted to one of the walls (1) of the cabinet above the thermal chamber (2). Cabinet for telecommunication equipment according to claim 1, characterized in that the thermal chamber (2) is made of - thermal insulation walls and includes - air conditioner (5), mounted to one of the walls of the thermal chamber (2), - and fans - external (9) and internal (10), located next to the air conditioner (5). Telecommunication equipment cabinet according to claim 2, characterized in that the air conditioner (5) consists of at least two heat-conducting bodies (7 and 8) connected to each other by a semiconductor element (6) located between the heat-conducting bodies. (7 and 8), mounted to one of the thermal insulation walls of the thermal chamber (2). Cabinet for telecommunication equipment according to claim 3, characterized in that each of the heat-conducting bodies (7 and 8) is made in the form of a radiator with fins. Cabinet for telecommunication equipment according to claim 3, characterized in that the heat-conducting bodies (7 and 8) are mounted on one of the heat-insulating walls of the thermal chamber (2), at least one of the heat-conducting bodies (8) being mounted in the inside of the thermal chamber (2) and at least one of the thermally conductive bodies (7) is mounted outside the thermal chamber (2).