阅读说明：本技术 适用于高原高寒地区的通信机柜 (Communication cabinet suitable for plateau severe cold area ) 是由 苏萌 李利 李高强 孟晓辉 李征 李泽卿 田真真 于 2021-06-23 设计创作，主要内容包括：本发明提供了一种适用于高原高寒地区的通信机柜,属于通信技术领域,包括柜体、空气循环系统以及保温系统；柜体包括前侧的设备室、后侧的系统室以及下方的换热室；柜体上方设有太阳能集热器；柜体外侧壁安装有光伏板；空气循环系统包括进风缓冲腔和出风缓冲腔,进风缓冲腔与出风缓冲腔管路连通,进风缓冲腔与新风管连接；出风缓冲腔连接有排风管；保温系统包括位于进风缓冲腔内的半导体加热器以及位于换热室内的换热器。本发明提供的适用于高原高寒地区的通信机柜,柜体内部设置与半导体加热系统配合的空气循环系统和热水循环管路,三种系统可分别单独使用也可以同时开启,便于维持柜体内的温度,保持柜体内的空气质量,防止风沙进入柜体。(The invention provides a communication cabinet suitable for plateau alpine regions, which belongs to the technical field of communication and comprises a cabinet body, an air circulation system and a heat preservation system; the cabinet body comprises a front equipment chamber, a rear system chamber and a lower heat exchange chamber; a solar heat collector is arranged above the cabinet body; the outer side wall of the cabinet body is provided with a photovoltaic panel; the air circulation system comprises an air inlet buffer cavity and an air outlet buffer cavity, the air inlet buffer cavity is communicated with the air outlet buffer cavity through a pipeline, and the air inlet buffer cavity is connected with the fresh air pipe; the air outlet buffer cavity is connected with an exhaust pipe; the heat preservation system comprises a semiconductor heater positioned in the air inlet buffer cavity and a heat exchanger positioned in the heat exchange chamber. According to the communication cabinet suitable for the plateau alpine region, the air circulation system and the hot water circulation pipeline matched with the semiconductor heating system are arranged in the cabinet body, the three systems can be used independently and can be started simultaneously, the temperature in the cabinet body can be maintained conveniently, the air quality in the cabinet body is maintained, and wind and sand are prevented from entering the cabinet body.)

1. Communication rack suitable for plateau severe cold district, its characterized in that includes:

the cabinet body comprises a front equipment chamber, a rear system chamber and a heat exchange chamber positioned below the equipment chamber and the system chamber; a solar heat collector is arranged above the cabinet body, and a water tank is arranged on the rear side of the solar heat collector; the photovoltaic panel is arranged on the outer side wall of the cabinet body and connected with a storage battery;

the air circulating system comprises an air inlet buffer cavity and an air outlet buffer cavity which are respectively positioned at the lower part and the upper part of the system chamber and communicated with the equipment chamber, the air inlet buffer cavity and the air outlet buffer cavity are also communicated through a connecting pipeline, the air inlet buffer cavity is connected with a fresh air pipe, and a filtering device is arranged in the fresh air pipe; the air outlet buffer cavity is connected with an air exhaust pipe;

the heat preservation system comprises a semiconductor heater and a heat exchanger, wherein the semiconductor heater is located in the air inlet buffer cavity and connected with the storage battery, the heat exchanger is located in the heat exchange chamber, the two sides of the heat exchanger are respectively connected with a water tank and a hot water circulation pipeline, and the hot water circulation pipeline is installed on the inner side wall of the cabinet body.

2. The communication cabinet suitable for plateau alpine regions as claimed in claim 1, wherein the number of the photovoltaic panels is plural, and the plural photovoltaic panels are respectively installed on the left side and the right side of the cabinet body.

3. The communication cabinet suitable for use in high and cold areas in plateau as claimed in claim 1, wherein there are two sets of hot water circulation pipes symmetrically arranged, and the two sets of hot water circulation pipes are respectively installed on the left and right side walls of the cabinet body.

4. The communication cabinet for use in alpine plateau regions of claim 3, wherein the hot water circulation line is laid uniformly in a serpentine shape.

5. The communication cabinet adapted for use in high and cold plateau areas of claim 1, wherein said cabinet wall includes:

the shell is a metal plate;

the inner shell is a metal plate;

the heat preservation is located the shell with between the inner shell, hot water circulation pipeline is located in the heat preservation, just hot water circulation pipeline with the inner shell laminating.

6. The communication cabinet suitable for use in high and cold areas as claimed in claim 1, wherein a bend is provided on a side of the fresh air duct extending out of the cabinet body, and the filtering device is located in the bend.

7. The communication cabinet suitable for use in alpine plateau areas of claim 6, wherein the end of the fresh air duct is flared.

8. The communication cabinet for use in alpine plateau regions of claim 1, wherein the exhaust duct has a filter device disposed therein.

9. The communication cabinet suitable for use in alpine regions in plateau as recited in claim 1, wherein a fresh air buffer chamber is provided between the inlet air buffer chamber and the outlet air buffer chamber, the fresh air duct communicates with the fresh air buffer chamber, and an air filter is provided on a side of the fresh air buffer chamber close to the inlet air buffer chamber.

10. The communication cabinet suitable for use in alpine regions in plateau as recited in claim 1, wherein fans are disposed in both the inlet buffer chamber and the outlet buffer chamber.

Technical Field

The invention belongs to the technical field of communication, and particularly relates to a communication cabinet suitable for plateau alpine regions.

Background

Communication stations in Tibet areas are mostly established in high and cold areas in plateaus, the lowest temperature can reach below-30 ℃ in poor climatic conditions, and heat dissipation is not needed in a communication cabinet, but heat preservation is needed to be enhanced, so that normal operation of internal equipment is guaranteed. The existing heat preservation mode adopts a semiconductor heating mode mostly, and the temperature in the communication cabinet is improved by heating the air in the communication cabinet. However, although semiconductor heating is easy to adjust, its service life is greatly reduced by long-term continuous use.

In addition, the sand storm caused by the open plateau is large, and the sand dust in the station also has great influence on the operation of the communication equipment. At present, the mode of arranging the ventilation opening on the side wall surface of the communication cabinet is not suitable for plateau areas, and sand blown by the wind enters the communication cabinet from the ventilation opening to influence the operation of internal equipment.

Disclosure of Invention

The invention aims to provide a communication cabinet suitable for plateau alpine regions, and aims to improve the heat preservation and sand prevention performance of the communication cabinet in the plateau alpine regions and ensure the operation efficiency of equipment.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a communication rack suitable for plateau severe cold district, includes:

the cabinet body comprises a front equipment chamber, a rear system chamber and a heat exchange chamber positioned below the equipment chamber and the system chamber; a solar heat collector is arranged above the cabinet body, and a water tank is arranged on the rear side of the solar heat collector; the photovoltaic panel is arranged on the outer side wall of the cabinet body and connected with a storage battery;

the air circulating system comprises an air inlet buffer cavity and an air outlet buffer cavity which are respectively positioned at the lower part and the upper part of the system chamber and communicated with the equipment chamber, the air inlet buffer cavity and the air outlet buffer cavity are also communicated through a connecting pipeline, the air inlet buffer cavity is connected with a fresh air pipe, and a filtering device is arranged in the fresh air pipe; the air outlet buffer cavity is connected with an air exhaust pipe;

the heat preservation system comprises a semiconductor heater and a heat exchanger, wherein the semiconductor heater is located in the air inlet buffer cavity and connected with the storage battery, the heat exchanger is located in the heat exchange chamber, the two sides of the heat exchanger are respectively connected with a water tank and a hot water circulation pipeline, and the hot water circulation pipeline is installed on the inner side wall of the cabinet body.

As another embodiment of this application, the photovoltaic board is a plurality of, and is a plurality of the photovoltaic board is installed respectively the left side and the right side of the cabinet body.

As another embodiment of this application, hot water circulating pipe way symmetry is provided with two sets ofly, and two sets of hot water circulating pipe way are installed respectively the left side wall and the right side wall of the cabinet body.

As another embodiment of the application, the hot water circulation pipeline is uniformly laid in a snake shape.

As another embodiment of the present application, the cabinet wall includes:

the shell is a metal plate;

the inner shell is a metal plate;

the heat preservation is located the shell with between the inner shell, hot water circulation pipeline is located in the heat preservation, just hot water circulation pipeline with the inner shell laminating.

As another embodiment of this application, the fresh air pipe stretches out one side of the cabinet body is equipped with the elbow, filter equipment is located in the elbow.

As another embodiment of the application, the end part of the fresh air pipe is provided with a bell mouth.

As another embodiment of the present application, a filtering device is disposed in the exhaust duct.

As another embodiment of this application, the air inlet cushion chamber with be equipped with the new trend cushion chamber between the air-out cushion chamber, the new trend pipe intercommunication the new trend cushion chamber, the new trend cushion chamber is close to one side of air inlet cushion chamber is equipped with air cleaner.

As another embodiment of this application, the air inlet cushion chamber with all be equipped with the fan in the air-out cushion chamber.

The communication cabinet suitable for the plateau severe cold area provided by the invention has the beneficial effects that: compared with the prior art, the invention is suitable for the communication cabinet in the alpine region in plateau, the air circulation system and the hot water circulation pipeline which are matched with the semiconductor heating system are arranged in the cabinet body, the three systems are matched and cooperated with each other, and can be used independently and started simultaneously, so that the temperature in the cabinet body can be maintained, the air quality in the cabinet body can be maintained, and wind sand can be prevented from entering the cabinet body; solar energy is utilized to the maximum extent, and energy conservation and emission reduction are achieved on the basis of maintaining the constant temperature of the communication cabinet.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a communication cabinet suitable for use in a plateau alpine region according to an embodiment of the present invention;

fig. 2 is a front view of a communication cabinet suitable for use in a highland and alpine region according to an embodiment of the present invention;

fig. 3 is a schematic layout view of a hot water circulation pipeline of a communication cabinet suitable for use in a plateau alpine region according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a side wall of a communication cabinet suitable for use in a highland and alpine region according to an embodiment of the present invention.

In the figure: 100. a cabinet body; 101. an equipment room; 102. a system room; 103. a heat exchange chamber; 104. a partition plate; 105. a laminate; 106. a housing; 107. a heat-insulating layer; 108. an inner shell; 110. a front door; 111. an observation window; 120. a photovoltaic panel; 121. a storage battery; 122. a semiconductor heater; 130. a solar heat collector; 131. a water tank; 132. a heat exchanger; 140. an air outlet buffer cavity; 141. an air inlet buffer cavity; 150. a fresh air duct; 151. a fresh air buffer cavity; 152. a filtration device; 153. an air filter; 154. an exhaust duct; 160. a hot water circulation line; 161. a horizontal water inlet main pipe; 162. a horizontal water outlet main pipe; 163. a power pump; 170. a trap.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and fig. 4, a communication cabinet suitable for use in a highland and alpine region according to the present invention will now be described. The communication cabinet suitable for the plateau alpine region comprises a cabinet body 100, an air circulation system and a heat preservation system; the cabinet 100 includes an equipment room 101 at a front side, a system room 102 at a rear side, and a heat exchange room 103 under the equipment room 101 and the system room 102; a solar heat collector 130 is arranged above the cabinet body 100, and a water tank 131 is arranged at the rear side of the solar heat collector 130; the outer side wall of the cabinet body 100 is provided with a photovoltaic panel 120, and the photovoltaic panel 120 is connected with a storage battery 121; the air circulation system comprises an air inlet buffer cavity 141 and an air outlet buffer cavity 140 which are respectively positioned at the lower part and the upper part of the system chamber 102 and communicated with the equipment chamber 101, the air inlet buffer cavity 141 is connected with a fresh air pipe 150, and a filtering device 152 is arranged in the fresh air pipe 150; the air outlet buffer cavity 140 is connected with an exhaust pipe 154; the heat preservation system comprises a semiconductor heater 122 which is positioned in the air inlet buffer cavity 141 and connected with the storage battery 121 and a heat exchanger 132 which is positioned in the heat exchange chamber 103, wherein two sides of the heat exchanger 132 are respectively connected with a water tank 131 and a hot water circulation pipeline 160, and the hot water circulation pipeline 160 is installed on the inner side wall of the cabinet body 100.

Compared with the prior art, the communication cabinet suitable for the plateau alpine region is provided with the heat exchanger 132 heat insulation system and the semiconductor heater 122 for heating circulating air, and has two independent heating ways which can be switched and can be started simultaneously; both methods avoid the continuous overload operation of the semiconductor heating, and simultaneously can avoid the defect that the solar heat collector 130 can not supply heat at night.

Although the environment is severe and the air temperature is low in severe cold areas in plateaus, the sunshine duration and the total radiation amount can reach high levels, and most energy loss can be saved by reasonably utilizing solar energy. However, the solar energy is greatly influenced by the weather, and it is difficult to realize the all-weather heat preservation of the communication cabinet only by the solar thermal collector 130 and the hot water circulation pipeline 160. Therefore, the semiconductor heating and hot water circulating pipeline 160 is independently arranged, solar energy is utilized to the maximum extent, and energy conservation and emission reduction are achieved on the basis of maintaining the constant temperature of the communication cabinet.

In addition, an air circulation system mainly including an inlet buffer chamber 141, a connecting pipeline and an outlet buffer chamber 140 is added in the cabinet 100, the inlet buffer chamber 141 is connected with a fresh air pipe 150, and the outlet buffer chamber 140 is connected with an exhaust pipe 154. The air circulation system may circulate air inside the cabinet 100, or exchange air with the outside, so as to ensure the quality of air inside the cabinet 100. The end of the fresh air pipe 150 is provided with a filtering device 152, and the filtering device 152 is used for filtering sand and wind in the air and preventing the sand and wind from entering the cabinet 100 from the fresh air pipe 150; while preventing small flying insects from flying into the cabinet 100.

The semiconductor heater 122 is installed in the air inlet buffer chamber, heats air in the air inlet buffer chamber, and then delivers the heated air to the equipment room 101 through the air circulation system, so as to raise the temperature of the equipment room 101 in the cabinet 100.

According to the communication cabinet suitable for the plateau alpine region, the air circulation system and the hot water circulation pipeline 160 matched with the semiconductor heating system are arranged in the cabinet body 100, the three systems are matched with each other and cooperate with each other, and can be used independently and started simultaneously, so that the temperature in the cabinet body 100 can be maintained, the air quality in the cabinet body 100 can be maintained, and wind and sand can be prevented from entering the cabinet body 100.

Specifically, the medium in the solar collector 130 may be water, and the solar collector 130 is connected with the water tank 131 through a water pipe, and the water tank 131 is connected with the heat exchanger 132. Optionally, the water tank 131 is provided with a first water inlet pipe and a first water outlet pipe, and the first water inlet pipe and the first water outlet pipe are respectively connected with a water outlet pipe and a water inlet pipe of the solar thermal collector 130; the lower end of the water tank 131 is provided with a second water inlet pipe and a second water outlet pipe, which are respectively connected to the heat exchanger 132 and used as a heat source of the hot water circulation pipeline 160.

The photovoltaic panel 120 generates electric energy under light conditions, the electric energy is stored in the storage battery 121, and the storage battery 121 is electrically connected with the semiconductor heater 122.

A frequency-modulated pump is arranged on the hot water circulation pipeline 160, and the hot water circulation pipeline 160 is mainly used for heat preservation of the cabinet 100 in the daytime. When the hot water circulation line 160 supplies insufficient heat, the air circulation system and the semiconductor heater 122 are turned on.

Optionally, valves are disposed on the fresh air duct 150 and the exhaust duct 154, and the open/close state can be switched.

As a specific embodiment of the communication cabinet suitable for use in the plateau and alpine region provided by the present invention, please refer to fig. 2, a plurality of photovoltaic panels 120 are provided, and the plurality of photovoltaic panels 120 are respectively installed on the left side and the right side of the cabinet body 100. In this embodiment, the photovoltaic panel 120 is connected to a storage battery 121 for providing power to the semiconductor heater 122. The photovoltaic panels 120 are installed at the outer side of the cabinet body 100, and in order to improve the efficiency of the photovoltaic panels 120, a plurality of photovoltaic panels 120 are provided; in consideration of the structure and the installation stability of the cabinet 100, connectors are provided at both left and right sides of the cabinet 100, and the photovoltaic panel 120 is installed at the outer side of the cabinet 100 by means of the connectors.

Specifically, the photovoltaic panels 120 are two, the length of the two photovoltaic panels 120 is the same as the height of the equipment room 101 of the cabinet 100, and the width of the photovoltaic panels 120 is the same as the depth of the cabinet 100. Thermal insulation devices are arranged on the four frames of the photovoltaic panel 120 and the rear back plate of the photovoltaic panel 120.

Under the influence of strong wind in plateau areas, the photovoltaic panel 120 is fixedly connected to the outside of the cabinet 100 by means of a connecting member. The connecting piece is Z-shaped, one connecting surface of the Z-shaped connecting piece is connected to the back panel of the photovoltaic panel 120, and the other connecting surface is connected to the outer side wall of the cabinet body 100. Optionally, a connection surface of the connecting member, which is used for connecting one side of the photovoltaic panel 120, is provided with a threaded hole, and the connecting member is bolted to the back plate of the photovoltaic panel 120. The connecting piece is welded with the outer side wall of the cabinet body 100.

As a specific embodiment of the communication cabinet suitable for use in the plateau and alpine region provided by the present invention, please refer to fig. 3, two sets of hot water circulation pipelines 160 are symmetrically disposed, and the two sets of hot water circulation pipelines 160 are respectively installed on the left side wall and the right side wall of the cabinet body 100. In this embodiment, two sets of hot water circulation pipelines 160 are symmetrically disposed on the left and right side walls of the equipment room 101 of the cabinet 100, the lower ends of the two sets of hot water circulation pipelines 160 are connected to a horizontal water inlet main pipe 161 and a horizontal water outlet main pipe 162, and the horizontal water inlet main pipe 161 is connected to the heat exchanger 132 by a power pump 163.

Specifically, the low-temperature water exchanges heat from the inside of the heat exchanger 132 and is heated to form high-temperature water, the high-temperature water is conveyed to the horizontal water inlet main pipe 161 through the power pump 163, and the high-temperature water uniformly flows into the two groups of hot water circulation pipelines 160 on the left side wall and the right side wall through the three-way valve of the horizontal water inlet main pipe 161. The high-temperature water is radiated in the hot water circulation line 160 to increase the temperature inside the equipment room 101 of the cabinet 100, and the high-temperature water flows through the hot water circulation line 160 to be low-temperature water. The low temperature water flows out to the heat exchanger 132 after being collected by the horizontal water outlet main pipe 162.

Optionally, the heat exchanger 132, the power water pump, the horizontal water inlet main pipe 161 and the horizontal water outlet main pipe 162 are all installed in the heat exchange chamber 103, a water replenishing pipe is arranged between the horizontal water outlet main pipe 162 and the heat exchanger 132, a water replenishing pump is arranged on the water replenishing pipe, and the water replenishing pipe is used for replenishing water into the hot water circulation pipeline 160.

Optionally, a layered plate 105 is disposed between the heat exchange chamber 103 and the equipment chamber 101, a water replenishing port is disposed on the layered plate 105, and a push plate capable of being opened in a sliding manner is disposed on the water replenishing port. When water is supplemented, the push plate is opened, and the water pipe penetrates through the water supplementing port from the opened equipment chamber 101 of the cabinet to be connected to the water supplementing pipe.

As a specific embodiment of the communication cabinet suitable for use in plateau and alpine regions provided by the present invention, please refer to fig. 3, the hot water circulation pipeline 160 is laid in a serpentine shape. In this embodiment, the hot water circulation pipes 160 are uniformly laid on the side walls of the cabinet 100, so that the left and right side walls of the cabinet 100 become heat sources for heating the air in the equipment room 101. The uniform laying can maintain the temperature of the whole side wall at a stable temperature, and the problem of temperature difference on the same wall surface can be avoided, so that the heating effect of the equipment room 101 is improved.

Specifically, for the equipment room 101, the left and right side walls of the cabinet 100 are two plate-shaped heat sources, and there are heat radiation and heat conduction between the heat sources and the inside of the equipment room 101. The plate-shaped heat source increases the contact area with the air of the equipment room 101, and improves the heat exchange efficiency.

Referring to fig. 2 and 4, as a specific embodiment of the communication cabinet suitable for use in plateau and alpine regions, a wall of the cabinet 100 includes an outer shell 106, an inner shell 108, and a heat insulating layer 107 located between the outer shell 106 and the inner shell 108; the outer shell 106 and the inner shell 108 are both made of metal plates; the hot water circulation pipe 160 is located in the insulation layer 107, and the hot water circulation pipe 160 is attached to the inner shell 108. In this embodiment, the wall of the cabinet 100 has a three-layer structure, which includes an inner shell 108, a heat insulation layer 107 and an outer shell 106 from inside to outside; the inner shell 108 and the outer shell 106 are mainly used for supporting the cabinet 100, the inner shell 108 and the outer shell 106 are made of metal plates, and the heat-insulating layer 107 can be made of heat-insulating materials such as foamed polyethylene. The hot water circulation pipe 160 is disposed on a side of the heat insulating layer 107 close to the inner casing 108, and a wall surface of the hot water circulation pipe 160 abuts against the inner casing 108 to heat the inner casing 108, so that the inner casing 108 becomes a plate-shaped heat source of the equipment room 101.

Specifically, support posts are provided between the inner and outer shells 108, 106 at the four corners of the cabinet 100.

Specifically, the outer diameter of the hot water circulation pipeline 160 is smaller than the thickness of the insulating layer 107, and one side of the hot water circulation pipeline 160 away from the inner shell 108 is closely attached to the insulating layer 107, so that heat in the hot water circulation pipeline 160 is prevented from being dissipated towards the outer shell 106, and heat loss is reduced.

Referring to fig. 2, as a specific embodiment of the communication cabinet suitable for use in plateau and alpine regions provided by the present invention, an elbow is disposed at a side of the fresh air duct 150 extending out of the cabinet body 100, and the filtering device 152 is located in the elbow. In this embodiment, in order to prevent sand blown by the wind from entering the cabinet 100 through the fresh air duct 150, the fresh air duct 150 is disposed at the rear side of the cabinet 100, and an elbow is disposed at an end of the fresh air duct 150 extending out of the cabinet 100, and the elbow is used to change an opening direction of the fresh air duct 150, so as to reduce the influence of the sand blown by the wind on the fresh air duct 150.

Specifically, the fresh air duct 150 is disposed at the lower end of the water tank 131, the exhaust duct 154 is disposed above the fresh air duct 150, and the exhaust duct 154 and the fresh air duct 150 are both provided with bends to prevent the ports of the fresh air duct 150 and the exhaust duct 154 from being perpendicular to the wall surface of the cabinet body 100, and wind and sand are blown into the duct from the ports to affect air intake and air exhaust.

Optionally, the bending angle of the fresh air duct 150 is 180 °, that is, two 90 ° elbows are installed on the fresh air duct 150, so that the port of the fresh air duct 150 faces the cabinet 100, and air enters the fresh air duct 150 from a gap between the wall surface and the end of the cabinet 100.

Alternatively, the exhaust duct 154 may be bent at an angle of 90 °. The exhaust duct 154 is disposed above the fresh air duct 150. In order to separate the exhaust duct 154 from the fresh air duct 150, the exhaust duct 154 is disposed on the upper end surface of the cabinet 100, and the water tank 131 is disposed on the rear side wall of the cabinet 100. The exhaust duct 154 is provided with an elbow, the exhaust duct 154 is located at the rear side of the solar collector 130, and a port of the exhaust duct 154 faces the solar collector 130.

As a specific embodiment of the communication cabinet suitable for use in the highland and alpine region provided by the present invention, please refer to fig. 2, a bell mouth is provided at the end of the fresh air duct 150. In this embodiment, the port department of fresh air pipe 150 is provided with the horn mouth, and the small-bore end of horn mouth is connected with fresh air pipe 150, and the horn mouth is used for enlarging the orificial diameter of fresh air pipe 150, reduces the orificial air flow velocity of fresh air pipe 150, prevents that the granule sand blown by the wind from being adsorbed to fresh air pipe 150.

Specifically, the ends of the fresh air duct 150 and the exhaust duct 154 are each flared to reduce the air flow rate.

The filter 152 is installed at the rear end of the bell mouth, and the filter 152 includes a coarse filter portion and a fine filter portion, and the coarse filter portion is located between the fine filter portion and the bell mouth. The aperture of the filter screen of the coarse filtering part is larger than that of the filter screen of the fine filtering part. A filter unit 152 is installed at the mouth of the fresh air duct 150 to facilitate inspection and replacement of the filter screen.

Specifically, after the external air enters the coarse filtering portion through the bell mouth, large-particle sand and dust in the air are blocked outside by the filter screen, and fine dust enters the fresh air duct 150 along with the air; the air primarily filtered by the coarse filtering part enters the fine filtering part and is secondarily filtered by the fine filtering part, and fine dust can be adhered to the fine filtering net. After the filter screen is used for a long time, the dust on the filter screen increases, and the filter effect worsens, therefore the filter screen needs in time to be changed, installs filter equipment 152 in the mouth of pipe department of new trend pipe 150, is convenient for take out the filter screen from the mouth of pipe of new trend pipe 150 to improve change efficiency.

Optionally, a filtering device 152 is disposed at the opening of the exhaust duct 154 for filtering the exhausted air and preventing external dust and flying insects from entering the cabinet 100 through the exhaust opening.

As a specific embodiment of the communication cabinet suitable for the plateau and high cold area provided by the present invention, please refer to fig. 2, a fresh air buffer chamber 151 is disposed between the air inlet buffer chamber 141 and the air outlet buffer chamber 140, the fresh air pipe 150 is communicated with the fresh air buffer chamber 151, and an air filter 153 is disposed on a side of the fresh air buffer chamber 151 close to the air outlet buffer chamber 140.

In this embodiment, the air inlet buffer cavity 141 and the air outlet buffer cavity 140 are connected by a connecting pipeline, a fresh air buffer cavity 151 is arranged on the connecting pipeline between the air inlet buffer cavity 141 and the air outlet buffer cavity 140, and the fresh air pipe 150 is communicated with the fresh air buffer cavity 151. Air enters the fresh air buffer cavity 151 from the fresh air pipe 150, the flow rate of the air is reduced in the fresh air buffer cavity 151, the air is mixed with the air in the cabinet body 100, and the fresh air and the original air are mixed completely in the fresh air buffer cavity 151 and then enter the air inlet buffer cavity 141.

Specifically, the air temperature in the cabinet 100 is higher, and the air temperature entering the fresh air buffer cavity 151 through the fresh air pipe 150 is lower, and when the fresh air directly enters the air inlet buffer cavity 141, the uneven air temperature and the unstable air flow rate can be generated, so that the temperature fluctuation in the cabinet 100 is larger and the air circulation system is unstable. Set up new trend buffer chamber 151, make the new trend in the new trend pipe 150 carry out the intensive mixing with the air in the former circulation circuit in the cabinet body 100 before getting into air inlet buffer chamber 141 and heating, the air temperature and the velocity of flow after the mixture all are in comparatively stable state.

When the air inlet pipe is opened, the air outlet pipe 154 is also opened, and the air inside the cabinet 100 is ventilated with the air outside the cabinet 100. After the air in the cabinet 100 enters the air outlet buffer cavity 140, part of the air is exhausted out of the cabinet 100 through the exhaust pipe 154, and the rest of the air still flows into the fresh air buffer cavity 151 through the connecting pipeline, so that the air circulation in the cabinet 100 is performed through the air inlet buffer cavity 141; at this time, the air outside the cabinet 100 enters the fresh air buffer chamber 151 through the air inlet pipe and is mixed with the air inside the cabinet 100 to form new mixed air.

The fresh air is preheated in the fresh air buffer cavity 151, the temperature of the formed mixed air is higher than that of the fresh air but lower than that of the air in the cabinet body 100, the semiconductor heater 122 is started at the moment, and the mixed air is heated by the semiconductor in the air inlet buffer cavity 141 and enters the equipment room 101.

Optionally, an air filter 153 is arranged between the fresh air buffer cavity 151 and the air inlet buffer cavity 141, and a temperature sensing device is connected to the lower end of the air filter 153 and used for detecting the temperature of air entering the air inlet buffer cavity 141. The semiconductor heater 122 is connected to a temperature sensing device.

Referring to fig. 2, fans are disposed in the air inlet buffer cavity 141 and the air outlet buffer cavity 140. In this embodiment, the equipment room 101 is connected to the system room 102 through the partition 104, the air inlet buffer cavity 141 and the air outlet buffer cavity 140 are respectively communicated with the equipment room 101 through an air inlet and an air outlet on the partition 104, fans are respectively disposed in the air inlet buffer cavity 141 and the air outlet buffer cavity 140, and the fans are disposed corresponding to the air inlet and the air outlet and used for driving air to flow.

Specifically, the air inlet buffer chamber 141 and the air outlet buffer chamber 140 are both provided with a bracket, the bracket is provided with a ventilation duct, and the fan is installed on the bracket. The semiconductor heater 122 in the air inlet buffer chamber 141 is arranged on one side of the bracket far away from the air inlet and is arranged at an interval with the bracket.

Specifically, an observation window 111 is provided on the front door 110 of the cabinet 100, and tempered glass is provided on the observation window 111. A sealing strip is arranged between the front door 110 and the cabinet body 100. The rear side of the cabinet 100 is provided with a trap 170 for trapping a plateau mouse.

Optionally, trap 170 may be selected from a trap shock device, or an ultrasonic mouse repellant device, such as digimaxUP-11E.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.