Outdoor communication cabinet with automatic temperature control

Abstract

The application discloses an outdoor communication cabinet with automatic temperature control, which comprises a communication cabinet body, a semiconductor heat pipe refrigeration system and a control system. The semiconductor heat pipe refrigeration system and the control system are arranged in the communication cabinet body. The communication cabinet body comprises an outer layer and an inner layer which are arranged in the communication cabinet body in a spaced manner from outside to inside. The outer layer comprises a radiation plate, and the inner layer comprises a composite phase change material layer and a steel plate. An air layer is formed between the outer layer and the inner layer. The air layer is in a through state except for the side of the cabinet door and the cabinet walls on the east side, the west side and the south side of the cabinet. A first ventilation opening which can be opened and closed is arranged below the left side of the cabinet body. Second ventilation openings which can be opened and closed are arranged above the right side of the cabinet body. A fan is arranged in the first ventilation opening and the second ventilation openings. The fan is connected with a semiconductor temperature difference power generation sheet. The semiconductor temperature difference power generation sheet is arranged on the inner layer of the cabinet body which is close to the ventilation opening. The opening and closing of the ventilation opening and the phase change process of the composite phase change material are utilized, so that the communication cabinet can be heat-insulated in summer and radiated in winter.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication equipment, in particular to an outdoor communication cabinet capable of automatically controlling temperature. BACKGROUND

[0002] With the rapid development of 5G communication technology, the high heat problem of 5G cabinet is increasingly prominent, and the system downtime problem caused by temperature control failure seriously endangers communication safety.

[0003] Therefore, it is necessary to carry out technical innovation for the high heat problem of 5G cabinet, and to prolong the service life of the cabinet by using multiple temperature control methods, which is a problem to be solved at present. SUMMARY

[0004] The technical problem to be solved by the present application is to solve the above-mentioned technical problems, and to provide a communication cabinet capable of automatically regulating the temperature in the cabinet according to the temperature difference between the outside and the inside of the cabinet.

[0005] The technical solution adopted by the present application to solve the technical problem is:

[0006] An outdoor communication cabinet capable of automatically controlling temperature, comprising a communication cabinet body, a semiconductor heat pipe refrigeration system and a control system, the semiconductor heat pipe refrigeration system and the control system being arranged in the communication cabinet body, the communication cabinet body comprising an outer layer and an inner layer arranged in the communication cabinet body, the outer layer comprising a radiation plate, the inner layer comprising a composite phase change material layer and a steel plate, an air layer being formed between the outer layer and the inner layer, the air layer being in a through state except for the side of the cabinet door, and the cabinet walls on the east side, the west side and the south side being connected;

[0007] A first ventilation opening capable of being opened and closed is arranged below the left side of the cabinet body, a second ventilation opening capable of being opened and closed is arranged above the right side of the cabinet body, a fan is arranged in the first ventilation opening and the second ventilation opening, the fan is connected with a semiconductor thermoelectric power generation sheet, and the semiconductor thermoelectric power generation sheet is arranged on the inner layer of the cabinet body close to the first ventilation opening and the second ventilation opening.

[0008] As a preferred, the first ventilation opening comprises a first outer ventilation opening arranged on the outer layer of the cabinet body and a first inner ventilation opening arranged on the inner layer of the cabinet body, and a first wind baffle is arranged between the first outer ventilation opening and the first inner ventilation opening.

[0009] As a preferred, the second ventilation opening comprises a second outer ventilation opening arranged on the outer layer of the cabinet body and a second inner ventilation opening arranged on the inner layer of the cabinet body, and a second wind baffle is arranged between the second outer ventilation opening and the second inner ventilation opening.

[0010] As a preferred, the semiconductor thermoelectric power generation sheet comprises a hot end substrate, a hot end flow guide strip, a P-type semiconductor element, an N-type semiconductor element, a cold end flow guide strip and a cold end substrate which are combined.

[0011] Preferably, the radiation plate is composed of an aluminum plate and a radiation refrigeration material layer, and the radiation refrigeration material layer is at least one of PET, PVF, PDMS, PMMA, and PTFE.

[0012] Preferably, the composite phase change material layer is a nano-composite phase change material layer prepared from paraffin and expanded graphite with a mass concentration of 8 wt.%.

[0013] Preferably, the control system comprises a temperature and humidity sensor and a controller, the signal output end of the temperature and humidity sensor is connected to the input end of the controller, and the controller controls the opening and closing of the first ventilation opening, the second ventilation opening, the fan, and the semiconductor thermoelectric power generation sheet.

[0014] The present application has the following advantages:

[0015] (1) By controlling the opening and closing of the ventilation opening and utilizing the change of the thermal conductivity of the composite phase change material during the phase change process, the problem of the fixed heat transfer characteristics of the envelope structure can be solved, and the heat insulation effect in summer and the heat dissipation effect in winter of the communication cabinet can be achieved.

[0016] (2) By arranging the semiconductor thermoelectric power generation sheet, the temperature difference between the inside and outside of the cabinet is utilized to generate electricity to drive the fan to operate, without the need for additional power supply, thereby reducing the operation cost.

[0017] (3) The composite phase change material is added to the inner layer of the cabinet, according to the characteristics of the paraffin-based nano-composite phase change material, the heat transfer of the envelope structure can be adjusted according to the change of the air temperature outside the cabinet, and the refrigeration energy consumption of the communication cabinet can be reduced.

[0018] (4) By adding the radiation refrigeration material to the outer layer of the cabinet, the high solar reflectivity and low infrared absorption rate of the material are utilized, and the refrigeration effect can be achieved without additional energy input. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic diagram of an outdoor communication cabinet with automatic temperature control according to an embodiment of the present application;

[0020] Figure 2a FIG. 2 is a front view of the ventilation work inside the outdoor communication cabinet with automatic temperature control according to the embodiment 1 of the present application;

[0021] Figure 2b FIG. 3 is a top view of the ventilation work inside the outdoor communication cabinet with automatic temperature control according to the embodiment 1 of the present application;

[0022] Figure 2c FIG. 4 is a schematic diagram of the heat transfer of the composite phase change layer inside the outdoor communication cabinet with automatic temperature control according to the embodiment 1 of the present application;

[0023] Figure 3a FIG. 5 is a front view of the outer ventilation work of the outdoor communication cabinet with automatic temperature control according to the embodiment 1 of the present application;

[0024] Figure 3b Fig. 1 is a top view of an outer ventilation of an automatic temperature-controlled outdoor communication cabinet according to an embodiment of the present application;

[0025] Figure 3c Fig. 1 is a top view of an outer ventilation of an automatic temperature-controlled outdoor communication cabinet according to an embodiment of the present application; DETAILED DESCRIPTION

[0026] The present application is further described in conjunction with the accompanying drawings and embodiments, which do not limit the scope of protection of the present application in any way. EMBODIMENT

[0027] As shown in Figure 1 , Figure 2a , Figure 2b , Figure 2c , Figure 3a , Figure 3b , Figure 3c An automatic temperature-controlled outdoor communication cabinet comprises a communication cabinet body 1, a semiconductor heat pipe refrigeration system 2 and a control system 3, wherein the semiconductor heat pipe refrigeration system 2 and the control system 3 are arranged in the communication cabinet body 1.

[0028] The communication cabinet body 1 is provided with a cabinet outer layer 4 and a cabinet inner layer 6 from outside to inside, the cabinet outer layer 4 comprises a radiation plate made of a 1.5 mm aluminum plate 41 and a 0.5 mm radiation refrigeration material layer 42, and the cabinet inner layer 6 comprises a 25 mm composite phase change material layer 61 and a 1 mm galvanized steel plate 62. An air layer 5 with a spacing of 20 mm is formed between the cabinet outer layer 4 and the cabinet inner layer 6, and the air layer 5 is in a through state except for the cabinet door side, and is connected to the cabinet walls on the east side, the west side and the south side. A first inner ventilation opening 7 and a first outer ventilation opening 9 are arranged on the left side of the cabinet outer layer 4 and the cabinet inner layer 6, and a first wind baffle 8 is arranged between the two ventilation openings. A second inner ventilation opening 11 and a second outer ventilation opening 12 are arranged on the right side of the cabinet outer layer 4 and the cabinet inner layer 6, and a second wind baffle 13 is arranged between the two ventilation openings. A fan is arranged in the first outer ventilation opening 9 and the second outer ventilation opening 12, and the fan is connected to a semiconductor thermoelectric power generation sheet, which comprises a first semiconductor thermoelectric power generation sheet 10 and a second semiconductor thermoelectric power generation sheet 14. The first semiconductor thermoelectric power generation sheet 10 is arranged on the cabinet inner layer 6 close to the first outer ventilation opening 9, and the second semiconductor thermoelectric power generation sheet 14 is arranged on the cabinet inner layer 6 close to the second outer ventilation opening 12.

[0029] The two ends of the first inner air vent 7, the first outer air vent 9, the second inner air vent 11 and the second outer air vent 12 are communicated with the inside of the cabinet, the air layer 5 and the outdoor. By controlling the opening and closing of the inner and outer air vents, the outdoor natural cold source can be introduced in winter and the transition season, meanwhile, the solid-state composite phase change material has a high thermal conductivity, which can enhance the heat transfer of the cabinet to the outside. When the outdoor temperature is high in summer, the outer air vent is opened to enhance the air convection, and meanwhile, the thermal conductivity of the liquid-state composite phase change material is reduced, which can reduce the interference of the outdoor to the base station.

[0030] The first outer air vent 9 and the second outer air vent 12 of the communication cabinet 1 are driven by the first semiconductor thermoelectric generator 10 and the second semiconductor thermoelectric generator 14 to operate the fan, and the semiconductor thermoelectric generator includes a hot end base plate, a hot end flow guide strip, a P-type semiconductor element, an N-type semiconductor element, a cold end flow guide strip and a cold end base plate. The cold end of the first semiconductor thermoelectric generator 10 and the second semiconductor thermoelectric generator 14 is connected with the outdoor air, and the hot end is connected with the air in the cabinet. Due to the temperature difference between the indoor and outdoor, the carriers of the hot end of the first semiconductor thermoelectric generator 10 and the second semiconductor thermoelectric generator 14 diffuse to the cold end, and the corresponding thermoelectric electromotive force drives the fan to operate.

[0031] The radiation refrigeration material layer 42 of the outer layer 4 of the cabinet is one of PET, PVF, PDMS, PMMA and PTFE. The sky radiation refrigeration material layer 42 has a low solar absorption rate. By adding the radiation plate of the radiation refrigeration material layer 42 and the aluminum plate 41 which combines good heat conduction performance and high reflectivity, the solar reflectivity of the surface of the cabinet can be increased, and the surface cooling purpose of the cabinet can be achieved.

[0032] The opening and closing of the above-mentioned first inner air vent 7, the first outer air vent 9, the second inner air vent 11 and the second outer air vent 12 and the fan are controlled by the control system 3. When all the air vents are closed, the corresponding air layer 5 is formed. The thickness of the air layer 5 can be set according to the ratio of the thickness of the air layer 5 to the height of the galvanized steel plate 62, which is 1:15. The air layer 5 forms a heat insulation layer between the outer layer and the inner layer of the communication cabinet 1 to reduce the heat transfer between the outdoor high temperature and the indoor high temperature. By controlling the opening and closing of the inner and outer air vents, the outdoor natural cold source is used to adjust the indoor temperature, thereby reducing the heat accumulation of the communication equipment and ensuring the normal operation of the communication equipment. The air layer 5 can also enhance the heat transfer of the cabinet to the outside, and reduce the interference of the outdoor to the base station.

[0033] In addition, the above-mentioned air vents can be provided with waterproof and dustproof filter cotton according to different climate conditions to increase the service life of the communication cabinet.

[0034] In the embodiment, the composite phase change material layer 61 is a nano-composite phase change material layer 61 prepared from paraffin and expanded graphite with a mass concentration of 8wt.%. The solid / liquid thermal conductivity of 8wt.% is 2.91 / 1.19 times, 2.00 / 1.16 times, 1.40 / 1.14 times and 1.12 / 1.10 times of the solid / liquid thermal conductivity of 1wt.%, 2wt.% and 4wt.%. The solid thermal conductivity of the paraffin-based nano-composite phase change material with a mass concentration of 8wt.% is 0.8604 W / (K.m), and the liquid thermal conductivity is 0.2342 W / (K.m), and the solid thermal conductivity is 3.7 times of the liquid thermal conductivity. When the outdoor temperature is high, the heat transfer direction is from the outdoor to the cabinet at this time, the phase change material melts into liquid state, the thermal conductivity decreases, the heat transfer resistance increases, and the external heat is prevented from being transferred into; when the outdoor temperature is low, the heat transfer direction is from the cabinet to the outdoor at this time, the phase change material solidifies into solid state, the thermal conductivity increases, the heat transfer resistance decreases, and more heat can be transferred outward. Through the change of the thermal conductivity of the phase change material during the phase change process, the heat transfer characteristics of the enclosure structure change with the outdoor air temperature, so as to reduce the energy consumption of the base station.

[0035] In the embodiment, the control system 3 includes a temperature and humidity sensor and a controller, the signal output end of the temperature and humidity sensor is connected to the input end of the controller, and the controller is used to control the ventilation opening, the first and second wind baffles 13, the fan, the first semiconductor thermoelectric power generation sheet 10 and the second semiconductor thermoelectric power generation sheet 14. The temperature and humidity sensor monitors the temperature in the cabinet and the outdoor temperature in real time, and the controller controls the opening and closing of the first and second inner and outer ventilation openings 7, 9, 11 and 12, the first and second wind baffles 13 and the first and second semiconductor thermoelectric power generation sheets 10 and 14 according to the measured values of the temperature and humidity sensor, so that the communication cabinet 1 operates in the following two working modes:

[0036] Referring to Figures 2a-2c, the inner ventilation mode: in the daytime, when the temperature and humidity sensor detects that the outdoor temperature is lower than the preset temperature in the cabinet, the control system 3 will control the first inner ventilation port 7, the first outer ventilation port 9, the second inner ventilation port 11, the second outer ventilation port 12 and the fan to be opened, and the first baffle and the second baffle to be closed, and meanwhile the first semiconductor thermoelectric power generation sheet 10 and the second semiconductor thermoelectric power generation sheet 14 are turned on. After the first inner ventilation port 7 and the second inner ventilation port 11 are opened, the cold end of the first semiconductor thermoelectric power generation sheet 10 and the second semiconductor thermoelectric power generation sheet 14 is connected with the outdoor air, and the hot end is in contact with the air in the cabinet. Under the action of the indoor and outdoor temperature difference, the carriers at the hot end of the semiconductor thermoelectric power generation sheet diffuse to the cold end, a corresponding thermoelectric electromotive force is generated to drive the fan to run and introduce the external natural cold source to mix with the hot air in the station, thereby reducing the temperature of the cabinet. At this time, the composite phase change material reaches the freezing point, the thermal conductivity increases, the cabinet can transfer more heat to the outside, and the operation energy consumption of the cabinet is reduced. Meanwhile, the high reflectivity and low absorbance of the radiation refrigeration material layer 42 of the outer layer 4 of the cabinet body are utilized to reduce the thermal interference of solar radiation on the cabinet.

[0037] Referring to Figures 3a-3c , the outer ventilation mode: when the temperature and humidity sensor detects that the outdoor temperature is higher than the preset temperature in the cabinet, the control system 3 will control the first outer ventilation port 9 and the second outer ventilation port 12 to be opened, the first baffle and the second baffle to be opened, and meanwhile the first semiconductor thermoelectric power generation sheet 10 and the second semiconductor thermoelectric power generation sheet 14 are turned on. After the outer ventilation port is opened, the cold end of the first semiconductor thermoelectric power generation sheet 10 and the second semiconductor thermoelectric power generation sheet 14 is in contact with the outdoor air, and the hot end is in contact with the air in the cabinet. Under the action of the indoor and outdoor temperature difference, the carriers at the hot end of the semiconductor thermoelectric power generation sheet diffuse to the cold end, a corresponding thermoelectric electromotive force is generated to drive the fan to run and introduce the external air, thereby reducing the temperature of the cabinet. At this time, the composite phase change material reaches the melting point and liquefies, the thermal conductivity decreases, the heat transfer thermal resistance increases, and the thermal interference of external heat is reduced. Meanwhile, the high reflectivity and low absorbance of the radiation refrigeration material layer 42 of the outer layer 4 of the cabinet body are utilized to reduce the thermal interference of solar radiation on the cabinet.

[0038] As for the opening time of the first inner ventilation port 7, the first outer ventilation port 9, the second inner ventilation port 11 and the second outer ventilation port 12, it is related to the outdoor temperature. As for Changsha which is cold in winter and hot in summer, the best ventilation mode is shown in the following table:

[0039]

[0040] The preset temperature in the cabinet in the above embodiment is 35℃, when each ventilation port and the fan are closed, the refrigeration system in the cabinet starts to run.

[0041] The beneficial effects that can be achieved by the above embodiment are as follows:

[0042] (1) By controlling the opening and closing of the ventilation opening and using the change of the heat conduction coefficient of the composite phase change material in the phase change process, the problem of the fixed heat transfer characteristics of the enclosure structure can be solved, and the heat insulation effect of the communication cabinet in summer and the heat dissipation effect in winter can be achieved.

[0043] (2) By setting the semiconductor thermoelectric power generation sheet, the temperature difference between the inside and outside of the cabinet is used to generate electricity to drive the fan to run, without additional power supply, and the operation cost is reduced.

[0044] (3) The composite phase change material is added to the inner layer 6 of the cabinet, according to the characteristics of the paraffin-based nano-composite phase change material, the heat transfer of the enclosure structure can be adjusted according to the change of the air temperature outside the cabinet, and the refrigeration energy consumption of the communication cabinet is reduced.

[0045] (4) By adding a radiation refrigeration material to the outer layer 4 of the cabinet, using the high solar reflectivity and low infrared absorption rate of the material, the refrigeration effect can be achieved without additional energy input.

[0046] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements fall within the scope of the present application.

Claims

1. An outdoor communication cabinet with automatic temperature control, comprising a communication cabinet body, a semiconductor heat pipe cooling system, and a control system, wherein the semiconductor heat pipe cooling system and the control system are disposed within the communication cabinet body, characterized in that, The communication cabinet includes an outer cabinet layer and an inner cabinet layer spaced apart from the outside to the inside. The outer cabinet layer includes a radiating plate, and the inner cabinet layer includes a composite phase change material layer and a steel plate. An air layer is formed between the outer cabinet layer and the inner cabinet layer. The air layer is open except for the cabinet door side, connecting the cabinet walls on the east, west and south sides of the cabinet. The cabinet has a first vent that can be opened and closed at the bottom left side and a second vent that can be opened and closed at the top right side. A fan is installed in the first and second vents, and the fan is connected to a thermoelectric generator. The thermoelectric generator is installed on the inner layer of the cabinet, which is closer to the first and second vents. The inner layer of the cabinet includes a nanocomposite phase change material layer prepared from paraffin and expanded graphite at a mass concentration of 8 wt.%, and the solid thermal conductivity of the material is 3.7 times that of the liquid thermal conductivity. The control system is used to: when the outdoor temperature is detected to be higher than the preset temperature inside the cabinet, control the activation of the external ventilation mode, at which time the composite phase change material layer melts into a liquid state, and its low thermal conductivity is used to prevent external heat from entering; when the outdoor temperature is detected to be lower than the preset temperature inside the cabinet, control the activation of the internal ventilation mode, at which time the composite phase change material layer solidifies into a solid state, and its high thermal conductivity is used to enhance the heat transfer from the cabinet to the outside.

2. The outdoor communication cabinet with automatic temperature control according to claim 1, characterized in that, The first ventilation opening includes a first external ventilation opening on the outer layer of the cabinet and a first internal ventilation opening on the inner layer of the cabinet, and a first baffle is provided between the first external ventilation opening and the first internal ventilation opening.

3. The outdoor communication cabinet with automatic temperature control according to claim 1, characterized in that, The second ventilation opening includes a second external ventilation opening on the outer layer of the cabinet and a second internal ventilation opening on the inner layer of the cabinet, with a second baffle plate between the second external ventilation opening and the second internal ventilation opening.

4. The outdoor communication cabinet with automatic temperature control according to claim 1, characterized in that, The semiconductor thermoelectric generator includes a hot-end substrate, a hot-end flow guide strip, a P-type semiconductor element, an N-type semiconductor element, a cold-end flow guide strip, and a cold-end substrate, all connected in combination.

5. The outdoor communication cabinet with automatic temperature control according to claim 1, characterized in that, The radiant plate is composed of an aluminum plate and a radiant cooling material layer, which is at least one of PET, PVF, PDMS, PMMA, and PTFE.

6. The outdoor communication cabinet with automatic temperature control according to any one of claims 1-5, characterized in that, The control system includes a temperature and humidity sensor and a controller. The signal output terminal of the temperature and humidity sensor is connected to the input terminal of the controller. The controller controls the opening and closing of the first vent, the second vent, the fan, and the semiconductor thermoelectric generator.

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