CN104896789A - Autonomous semiconductor refrigeration cabinet and control method thereof - Google Patents
Autonomous semiconductor refrigeration cabinet and control method thereof Download PDFInfo
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- CN104896789A CN104896789A CN201510312007.1A CN201510312007A CN104896789A CN 104896789 A CN104896789 A CN 104896789A CN 201510312007 A CN201510312007 A CN 201510312007A CN 104896789 A CN104896789 A CN 104896789A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 194
- 238000005057 refrigeration Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 238000004146 energy storage Methods 0.000 claims abstract description 17
- 238000003860 storage Methods 0.000 claims abstract description 11
- 230000005855 radiation Effects 0.000 claims description 27
- 238000009825 accumulation Methods 0.000 claims description 12
- 238000005728 strengthening Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 238000010248 power generation Methods 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 26
- 239000000463 material Substances 0.000 description 7
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
- F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/02—Details of machines, plants or systems, using electric or magnetic effects using Peltier effects; using Nernst-Ettinghausen effects
- F25B2321/021—Control thereof
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Photovoltaic Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses an autonomous semiconductor refrigeration cabinet and a control method thereof. The system comprises an energy storage system, a semiconductor refrigeration system, and a control system, the energy storage system comprises a solar photovoltaic assembly and a storage battery, the semiconductor refrigeration system comprises a circulation fan, a cold end substrate, a cold end guide strip, conductive elements, hot end guide strips, and a hot end substrate, and the control system comprises a photosensitive element, a temperature sensor, and a controller. According to the autonomous semiconductor refrigeration cabinet and the control method thereof, solar power generation is directly employed to drive the semiconductor refrigeration system to operate, the consumption of electric supply for refrigeration is not needed, the refrigeration energy consumption of outdoor cabinets is greatly reduced, emergency cooling standby cold sources can be provided for power failure, and the system stability is higher.
Description
Technical field
The present invention relates to a kind of autonomous type semiconductor refrigerating rack and control method thereof, belong to air conditioner technology field.
Background technology
Along with the develop rapidly of China's Telecommunication's cause and the continuous expansion of communication network scale, the electric cost of communication enterprise is also constantly going up.Communication cabinet is reception and the switching center of signal of communication, realizes the Signal transmissions of communication network and terminal client, and its operational effect directly determines the quality of communication quality, is the nervous centralis building of Office of the Telecommunications Authority.By to the first half of the year in 2013, the quantity of China's mobile phone is more than 11.5 hundred million.The transmission of a large amount of signals of communication makes the quantity such as communication network device, power-supply system and communication cabinet be multiplied.Round-the-clock continual communicating requirement in communication cabinet, makes the energy consumption of communication network increase rapidly.
From the whole nation, China is the country that solar energy resources quite enriches, and total radiation is roughly between 930--2330 kilowatt-hour/square metre/year.Overwhelming majority's amount of radiation of regional annual day is at more than 4kWh/ ㎡, and Tibet is up to 7kWh/ ㎡.Taking it by and large, China about has the regional solar energy resources of more than 2/3rds better, and particularly Qinghai-Tibet Platean and Xinjiang, Gansu, the Inner Mongol one are with, and utilize the condition of solar energy especially favourable.According to various places accept total solar radiation amount number, the whole nation can be divided into four classes area.One class area is the abundantest area of Chinese solar energy resources, day amount of radiation >5.1KWh/ ㎡.These areas comprise the ground such as Northern Ningxia, Northern Kansu, In The Eastern Xinjiang, West of Qinghai Province and western Tibet.Especially the abundantest with western Tibet, be up to a day amount of radiation 6.4KWh/ ㎡, occupy second place of the world, be only second to the Sahara desert.Two class areas are the comparatively abundant area of Chinese solar energy resources, day amount of radiation 4.1 ~ 5.1KWh/ ㎡.These areas comprise the ground such as the northwestward, Hebei, North of Shanxi, Southern Nei Mongol, Southern Ningxia, Middle Gansu Province, East of Qinghai Province, Southeastern Tibet and southern Xinjiang.Three class areas are Chinese solar energy resources Midpoint type area, day amount of radiation 3.3 ~ 4.1KWh/ ㎡.Mainly comprise the ground such as Shandong, Henan, the southeast, Hebei, Southern Shanxi Province, In The North of Xinjiang, Jilin, Liaoning, Yunnan, North Shaanxi, the southeast of Gansu, South Guangdong, south Fujian, northern Suzhou, Wan Bei, Southwest Taiwan portion.Four class areas are the poor areas of Chinese solar energy resources, day amount of radiation <3.1KWh/ ㎡.These areas comprise Hunan, Hubei, Guangxi, Jiangxi, Zhejiang, the north, Fujian, North Guangdong, Southern Shaanxi, Along North Jiangsu, Southern Anhui Province and the ground such as Heilungkiang, Northeast of Taiwan portion.Sichuan, Guizhou two province are the minimum areas of Chinese solar energy resources, day amount of radiation only have 2.5 ~ 3.2KWh/ ㎡.
China's solar energy resources enriches, inexhaustible, and photovoltaic generation resource is general, and system architecture is simple, and volume is little and light, and operation maintenance is simple, and clean and safe, noiseless, reliability are high, the life-span is long, and economy has comparative advantages.No matter from the long-range strategic angle of energy security, or consider from adjustment and Optimization of Energy Structure demand, greatly developing photovoltaic generation is all one of grand strategy measure of guarantee Chinese energy safety.
Owing to there being numerous heat-producing device continuous services in communication cabinet, air-conditioning system need be configured to ensure the constant temperature and humidity of rack for controlling cabinet temperature.Existing communication cabinet air conditioner adopts following two kinds of modes often, i.e. steam-type compression refrigerating system and semiconductor refrigeration system.Steam-type compression refrigerating system, because rack caloric value is large, all need refrigerating operaton throughout the year, operating cost is high, and energy consumption is large.And vapor compression refrigeration system is large at outdoor intensity of sunshine, when in rack, refrigeration duty is large, energy consumption is larger, again reduces the life and reliability of unit while wasting energy.Semiconductor refrigeration system is only made up of cold junction, hot junction, power supply, circuit etc., and structure is simple, mechanical moving component, and without wearing and tearing, the life-span is long; System, without the need to cold-producing medium, is exempted because of leakage of refrigerant pollution on the environment; Volume is little, lightweight, arbitrarily can arrange according to actual conditions; Cooling velocity, by regulating DC voltage control, flexibly and easily, is widely used in the electronic component cooling of micro-refrigerating field.But now conventional semiconductor refrigeration system is in the annual operation without stopping, and Energy Efficiency Ratio is low, becomes the principal element of this System Development of restriction.
Therefore, be necessary to design a kind of energy consumption low, the autonomous type semiconductor refrigerating rack that Energy Efficiency Ratio is high and control method thereof.
Summary of the invention
Technical problem solved by the invention is, for the deficiencies in the prior art, provide a kind of autonomous type semiconductor refrigerating rack and control method thereof, energy consumption is low, and Energy Efficiency Ratio is high.
Technical scheme of the present invention is:
A kind of autonomous type semiconductor refrigerating rack, comprises cabinet body 1, energy-storage system 3, semiconductor refrigeration system 2 and control system;
Described energy-storage system comprises solar photovoltaic assembly 4 and battery 5, and solar photovoltaic assembly 4 is connected with battery 5 by charging circuit; Solar photovoltaic assembly 4 is for being converted to electric energy by solar energy;
Described solar photovoltaic assembly 4 is installed on outside cabinet body 1; Battery 5 is installed in cabinet body 1; Described semiconductor refrigeration system 2 is installed on cabinet body 1 side;
Described semiconductor refrigeration system comprises cold junction substrate 10, cold junction flow guide bar 9, P-type semiconductor element, N-type semiconductor element 8, hot junction flow guide bar 7 and hot junction substrate 6; Described cold junction flow guide bar 9 is attached on cold junction substrate 10, and described hot junction flow guide bar 7 is attached on hot junction substrate 6, and described P-type semiconductor element and N-type semiconductor element 8 form galvanic circle between cold junction flow guide bar 9 and hot junction flow guide bar 7; Described semiconductor refrigeration system is by civil power or storage battery power supply;
Described control system comprises photo-sensitive cell, temperature sensor and controller; Photo-sensitive cell is all connected with the signal input part of controller with the signal input part of temperature sensor; Photo-sensitive cell is used for solar radiation intensity outside sensing chamber; Temperature sensor is for monitoring the intrinsic temperature of rack; Controller is for the break-make of the power supply circuits of the break-make and semiconductor refrigeration system that control battery charging circuit.
When photo-sensitive cell detects that outdoor solar radiation intensity is greater than 0 when available solar energy (outdoor have), controller controls battery charging circuit conducting, is stored in by the solar energy that solar photovoltaic assembly 4 transforms in battery 5; When temperature sensor monitors to the temperature in cabinet body higher than preset value (40 DEG C) time, controller controls the power supply circuits conducting of semiconductor refrigeration system, drive semiconductor refrigeration system to run by civil power or battery, reduce the temperature in cabinet body.
Described hot junction flow guide bar 7 comprises the first hot junction flow guide bar and the second hot junction flow guide bar; P-type semiconductor element is connected between the first hot junction flow guide bar and cold junction flow guide bar 9; N-type semiconductor element is connected between the second hot junction flow guide bar and cold junction flow guide bar 9; First hot junction flow guide bar connects battery terminal negative, and the second hot junction flow guide bar connects battery positive voltage.
In described cabinet body 1, circulating fan 11 is installed, for promoting the heat exchange of heat in cabinet body and semiconductor refrigeration system 2.
Described cabinet body 1 comprises outside door-plate and internal stent; Outside door-plate and internal stent are that combined type is installed, can on-the-spot dismounting door-plate and internal structure, convenient transportation.
Solar photovoltaic assembly 4 in described energy-storage system is directly set on the outside door-plate of south orientation of cabinet body 1, does not take the installing space in cabinet body.
Photo-sensitive cell detects solar radiation intensity in real time; Temperature sensor detects the temperature in cabinet body 1 in real time;
Controller, according to the measured value of photo-sensitive cell and temperature sensor, controls the break-make of the break-make of battery charging circuit and the power supply circuits of semiconductor refrigeration system, makes autonomous type semiconductor refrigerating rack simultaneously or three kinds of operating modes below isolated operation:
Accumulation of energy operating mode: when photo-sensitive cell detects that outdoor solar radiation intensity is greater than 0 when available solar energy (outdoor have), controller controls battery charging circuit conducting, the solar energy that solar photovoltaic assembly 4 is collected is converted to power storage in battery 5;
Civil power cooling condition: when temperature sensor monitors to the temperature in cabinet body 1 higher than preset value time, controller control civil power be that semiconductor refrigeration system is powered, drive semiconductor refrigeration system run; In hot junction, electric current flows to N-type semiconductor element by P-type semiconductor element, and temperature raises, and to the outer release heat of cabinet body 1; At cold junction, electric current flows to P-type semiconductor element by N-type semiconductor element, and temperature reduces, and absorbs heat in cabinet body 1, reduces the temperature in cabinet body 1;
Battery cooling condition: when temperature sensor monitors to the temperature in cabinet body 1 higher than preset value time, controller control battery be that semiconductor refrigeration system is powered, drive semiconductor refrigeration system run; In hot junction, electric current flows to N-type semiconductor element by P-type semiconductor element, and temperature raises, and to the outer release heat of cabinet body 1; At cold junction, electric current flows to P-type semiconductor element by N-type semiconductor element, and temperature reduces, and absorbs heat in cabinet body 1, reduces the temperature in cabinet body 1;
Circulating fan 11 is installed, for strengthening the heat exchange of heat in cabinet body 1 and semiconductor refrigeration system 2 in cabinet body 1.
A control method for autonomous type semiconductor refrigerating rack, adopts above-mentioned autonomous type semiconductor refrigerating rack;
Photo-sensitive cell detects and detects solar radiation intensity in real time; Temperature sensor detects the temperature in cabinet body 1 in real time;
Controller, according to the measured value of photo-sensitive cell and temperature sensor, controls the break-make of the break-make of battery charging circuit and the power supply circuits of semiconductor refrigeration system, makes autonomous type semiconductor refrigerating rack simultaneously or three kinds of operating modes below isolated operation:
Accumulation of energy operating mode: when photo-sensitive cell detects that outdoor solar radiation intensity is greater than 0 when available solar energy (outdoor have), controller controls battery charging circuit conducting, the solar energy that solar photovoltaic assembly 4 is collected is converted to power storage in battery 5;
Civil power cooling condition: when temperature sensor monitors to the temperature in cabinet body 1 higher than preset value time, controller control civil power be that semiconductor refrigeration system is powered, drive semiconductor refrigeration system run; In hot junction, electric current flows to N-type semiconductor element by P-type semiconductor element, and temperature raises, and to outdoor release heat; At cold junction, electric current flows to P-type semiconductor element by N-type semiconductor element, and temperature reduces, and absorbs heat in cabinet body 1, reduces the temperature in cabinet body 1;
Battery cooling condition: when temperature sensor monitors to the temperature in cabinet body 1 higher than preset value time, controller control battery be that semiconductor refrigeration system is powered, drive semiconductor refrigeration system run; In hot junction, electric current flows to N-type semiconductor element by P-type semiconductor element, and temperature raises, and to outdoor release heat; At cold junction, electric current flows to P-type semiconductor element by N-type semiconductor element, and temperature reduces, and absorbs heat in cabinet body 1, reduces the temperature in cabinet body 1;
Cooling condition is realized by semiconductor refrigeration system.When one block of N-type semiconductor material and one block of P-type semiconductor material are linked to be galvanic couple pair, connect DC current in circuit, the transfer of energy will occur.Electric current flows to N-type semiconductor element by P-type semiconductor element, and release heat becomes hot junction; Electric current flows to P-type semiconductor element by N-type semiconductor element, absorbs heat, becomes cold junction.
In described cabinet body 1, circulating fan 11 is installed, for strengthening the heat exchange of heat in cabinet body 1 and semiconductor refrigeration system 2.
Described preset value is 40 DEG C.
During mains failure, run battery cooling condition.
Beneficial effect:
The present invention compared with prior art, has significant energy-saving effect.The solar energy resources that the present invention directly utilizes occurring in nature abundant is communication equipment cooling in rack, be electric energy by thermal power transfer disadvantageous in solar energy, turn waste into wealth, the electrical energy drive that semiconductor refrigeration system can directly be stored by solar energy accumulation system runs, and greatly reduces the energy consumption of conventional semiconductors refrigeration system.In addition, the solar photovoltaic assembly of energy-storage system is directly installed on the door-plate of rack, does not take the inner space of rack, without the need to new mounting bracket and space, ensures the useful space in rack.Energy-storage system provides when can be power failure answers quench low-temperature receiver for subsequent use, when mains failure, this semiconductor refrigeration system can directly by the electrical energy drive in battery, during guarantee mains failure, system normal table runs, signal of communication normal transmission, for maintenance work is raced against time, make the stability of system higher.
Accompanying drawing explanation
Fig. 1 is structure chart of the present invention;
Fig. 2 is principle schematic of the present invention.
Description of reference numerals:
1-cabinet body, 2-semiconductor refrigeration system, 3-energy-storage system, 4-solar photovoltaic assembly, 5-battery, 6-hot junction substrate, 7-hot junction flow guide bar, 8-N-type semiconductor element, 9-cold junction flow guide bar, 10-cold junction substrate, 11-circulating fan.
Detailed description of the invention
In order to make technological means of the present invention, character of innovation, reach object and effect is easy to understand, below in conjunction with concrete diagram, set forth the operation principle of this invention further.
See Fig. 1 and Fig. 2, the invention provides a kind of autonomous type semiconductor refrigerating rack, comprise cabinet body 1, energy-storage system 3, semiconductor refrigeration system 2 and control system;
Described energy-storage system comprises solar photovoltaic assembly 4 and battery 5, and solar photovoltaic assembly 4 is connected with battery 5 by charging circuit; Solar photovoltaic assembly 4 is for being converted to electric energy by solar energy;
Described solar photovoltaic assembly 4 is installed on outside cabinet body 1; Battery 5 is installed in cabinet body 1; Described semiconductor refrigeration system 2 is installed on cabinet body 1 side;
Described semiconductor refrigeration system comprises cold junction substrate 10, cold junction flow guide bar 9, P-type semiconductor element, N-type semiconductor element 8, hot junction flow guide bar 7 and hot junction substrate 6; Described cold junction flow guide bar 9 is attached on cold junction substrate 10, and described hot junction flow guide bar 7 is attached on hot junction substrate 6, and described P-type semiconductor element and N-type semiconductor element 8 form galvanic circle between cold junction flow guide bar 9 and hot junction flow guide bar 7; Described semiconductor refrigeration system is by civil power or storage battery power supply;
Described control system comprises photo-sensitive cell, temperature sensor and controller; Photo-sensitive cell is all connected with the signal input part of controller with the signal input part of temperature sensor; Photo-sensitive cell is used for solar radiation intensity outside sensing chamber; Temperature sensor is for monitoring the intrinsic temperature of rack; Controller is for the break-make of the power supply circuits of the break-make and semiconductor refrigeration system that control battery charging circuit.
When photo-sensitive cell detects that outdoor solar radiation intensity is greater than 0 when available solar energy (outdoor have), controller controls battery charging circuit conducting, is stored in by the solar energy that solar photovoltaic assembly 4 transforms in battery 5; When temperature sensor monitors to the temperature in cabinet body higher than preset value (40 DEG C) time, controller controls the power supply circuits conducting of semiconductor refrigeration system, drive semiconductor refrigeration system to run by civil power or battery, reduce the temperature in cabinet body.
Described hot junction flow guide bar 7 comprises the first hot junction flow guide bar and the second hot junction flow guide bar; P-type semiconductor element is connected between the first hot junction flow guide bar and cold junction flow guide bar 9; N-type semiconductor element is connected between the second hot junction flow guide bar and cold junction flow guide bar 9; First hot junction flow guide bar connects battery terminal negative, and the second hot junction flow guide bar connects battery positive voltage.
In described cabinet body 1, circulating fan 11 is installed, for promoting the heat exchange of heat in cabinet body and semiconductor refrigeration system 2.
Described cabinet body 1 comprises outside door-plate and internal stent; Outside door-plate and internal stent are that combined type is installed, can on-the-spot dismounting door-plate and internal structure, convenient transportation.
Solar photovoltaic assembly 4 in described energy-storage system is directly set on the outside door-plate of south orientation of cabinet body 1, does not take the installing space in cabinet body.
Photo-sensitive cell detects solar radiation intensity in real time; Temperature sensor detects the temperature in cabinet body 1 in real time;
Controller, according to the measured value of photo-sensitive cell and temperature sensor, controls the break-make of the break-make of battery charging circuit and the power supply circuits of semiconductor refrigeration system, makes autonomous type semiconductor refrigerating rack simultaneously or three kinds of operating modes below isolated operation:
Accumulation of energy operating mode: when photo-sensitive cell detects that outdoor solar radiation intensity is greater than 0 when available solar energy (outdoor have), controller controls battery charging circuit conducting, the solar energy that solar photovoltaic assembly 4 is collected is converted to power storage in battery 5;
Civil power cooling condition: when temperature sensor monitors to the temperature in cabinet body 1 higher than preset value time, controller control civil power be that semiconductor refrigeration system is powered, drive semiconductor refrigeration system run; In hot junction, electric current flows to N-type semiconductor element by P-type semiconductor element, and temperature raises, and to the outer release heat of cabinet body 1; At cold junction, electric current flows to P-type semiconductor element by N-type semiconductor element, and temperature reduces, and absorbs heat in cabinet body 1, reduces the temperature in cabinet body 1;
Battery cooling condition: when temperature sensor monitors to the temperature in cabinet body 1 higher than preset value time, controller control battery be that semiconductor refrigeration system is powered, drive semiconductor refrigeration system run; In hot junction, electric current flows to N-type semiconductor element by P-type semiconductor element, and temperature raises, and to the outer release heat of cabinet body 1; At cold junction, electric current flows to P-type semiconductor element by N-type semiconductor element, and temperature reduces, and absorbs heat in cabinet body 1, reduces the temperature in cabinet body 1;
Circulating fan 11 is installed, for strengthening the heat exchange of heat in cabinet body 1 and semiconductor refrigeration system 2 in cabinet body 1.
Present invention also offers a kind of control method of autonomous type semiconductor refrigerating rack, adopt above-mentioned autonomous type semiconductor refrigerating rack;
Photo-sensitive cell detects and detects solar radiation intensity in real time; Temperature sensor detects the temperature in cabinet body 1 in real time;
Controller, according to the measured value of photo-sensitive cell and temperature sensor, controls the break-make of the break-make of battery charging circuit and the power supply circuits of semiconductor refrigeration system, makes autonomous type semiconductor refrigerating rack simultaneously or three kinds of operating modes below isolated operation:
Accumulation of energy operating mode: when photo-sensitive cell detects that outdoor solar radiation intensity is greater than 0 when available solar energy (outdoor have), controller controls battery charging circuit conducting, the solar energy that solar photovoltaic assembly 4 is collected is converted to power storage in battery 5;
Civil power cooling condition: when temperature sensor monitors to the temperature in cabinet body 1 higher than preset value time, controller control civil power be that semiconductor refrigeration system is powered, drive semiconductor refrigeration system run; In hot junction, electric current flows to N-type semiconductor element by P-type semiconductor element, and temperature raises, and to outdoor release heat; At cold junction, electric current flows to P-type semiconductor element by N-type semiconductor element, and temperature reduces, and absorbs heat in cabinet body 1, reduces the temperature in cabinet body 1;
Battery cooling condition: when temperature sensor monitors to the temperature in cabinet body 1 higher than preset value time, controller control battery be that semiconductor refrigeration system is powered, drive semiconductor refrigeration system run; In hot junction, electric current flows to N-type semiconductor element by P-type semiconductor element, and temperature raises, and to outdoor release heat; At cold junction, electric current flows to P-type semiconductor element by N-type semiconductor element, and temperature reduces, and absorbs heat in cabinet body 1, reduces the temperature in cabinet body 1;
Cooling condition is realized by semiconductor refrigeration system.When one block of N-type semiconductor material and one block of P-type semiconductor material are linked to be galvanic couple pair, connect DC current in circuit, the transfer of energy will occur.Electric current flows to N-type semiconductor element by P-type semiconductor element, and release heat becomes hot junction; Electric current flows to P-type semiconductor element by N-type semiconductor element, absorbs heat, becomes cold junction.
In described cabinet body 1, circulating fan 11 is installed, for strengthening the heat exchange of heat in cabinet body 1 and semiconductor refrigeration system 2.
Described preset value is 40 DEG C.
During mains failure, run battery cooling condition.
The present invention can carry out temperature control by its own system circulation to communication cabinet, realizing the cooling of communication cabinet, overcoming the problem that conventional semiconductors refrigerating efficiency is low without the need to consuming unnecessary electric energy.Its energy-storage system adopted is a solar energy photoelectric conversion system, solar photovoltaic assembly is set in the south orientation cabinet door of rack, abundant absorption solar radiant energy, solar energy is converted to electric energy, drive the operation of direct current semiconductor refrigerating equipment, realize the cooling in communication cabinet, without the need to consuming additional electrical energy.In addition, during mains failure, this autonomous type semiconductor refrigerating rack can provide answers quench low-temperature receiver, ensures the safety of emergency communication, stable operation.
Work operating mode of the present invention is divided into three kinds of operating modes simultaneously or isolated operation, is respectively accumulation of energy operating mode, civil power cooling condition, battery cooling condition.
Accumulation of energy operating mode: accumulation of energy operating mode realizes primarily of energy-storage system, energy-storage system mainly comprises solar photovoltaic assembly, battery and controller for solar.Detect solar radiation intensity by the photo-sensitive cell of controller for solar, the solar energy collected by solar photovoltaic assembly by connection line is converted to power storage in battery.
Civil power cooling condition: cooling condition is realized by semiconductor refrigeration system, semiconductor refrigeration system is by mains-supplied, and semiconductor refrigeration system mainly comprises circulating fan, cold junction substrate, cold junction flow guide bar, conducting element (P type and N-type semiconductor material), hot junction flow guide bar and hot junction substrate and control system.When one block of N-type semiconductor material and one block of P-type semiconductor material are linked to be galvanic couple to [P-N type galvanic couple to], connect DC current in circuit, the transfer of energy will occur.Be positioned at node above, the sense of current is by P to N, and temperature raises, and outwardly release heat, become hot junction, be positioned at node below, the sense of current is by N to P, and temperature reduces, and absorbs heat from the external world, becomes cold junction.Strengthened the absorption of cold junction position cold by circulating fan, realize the cooling in rack.
Battery cooling condition: solar energy accumulation system and semiconductor refrigeration system cooperation, the electrical energy drive that semiconductor refrigeration system is directly stored by solar energy accumulation system, without the need to consuming additional electrical energy, overcome the problem of semiconductor refrigerating not energy efficient, substantially reduce the energy consumption for cooling of communication cabinet.
During mains failure, this semiconductor refrigeration system can normally run, and directly by the electrical energy drive in battery, ensures the normal transmission of signal of communication during mains failure, for maintenance work is raced against time.
The present invention to be circulated the refrigeration realized in communication cabinet by its own system, ensures the temperature requirement in communication cabinet, ensures the safety and stability transmission of signal of communication.By solar photovoltaic assembly, solar radiant energy is converted to electric energy, the high temperature adverse environment too much brought by solar energy is converted to the power driving semiconductor refrigeration system to run, and this refrigerating machine cabinet can ensure the normal transmission of signal of communication when mains failure.This system is more flexible by vapour compression refrigeration system than communication cabinet, and higher than conventional semiconductors refrigerant system efficiency, the life-span is longer, more energy-conservation.
Claims (10)
1. an autonomous type semiconductor refrigerating rack, is characterized in that, comprises cabinet body (1), energy-storage system (3), semiconductor refrigeration system (2) and control system;
Described energy-storage system comprises solar photovoltaic assembly (4) and battery (5), and solar photovoltaic assembly (4) is connected with battery (5) by charging circuit; Solar photovoltaic assembly (4) is for being converted to electric energy by solar energy;
Described solar photovoltaic assembly (4) is installed on cabinet body (1) outward; Battery (5) is installed in cabinet body (1); Described semiconductor refrigeration system (2) is installed on cabinet body (1) side;
Described semiconductor refrigeration system comprises cold junction substrate (10), cold junction flow guide bar (9), P-type semiconductor element, N-type semiconductor element (8), hot junction flow guide bar (7) and hot junction substrate (6); Described cold junction flow guide bar (9) is attached on cold junction substrate (10), described hot junction flow guide bar (7) is attached on hot junction substrate (6), and described P-type semiconductor element and N-type semiconductor element (8) are positioned between cold junction flow guide bar (9) and hot junction flow guide bar (7) and form galvanic circle; Described semiconductor refrigeration system is by civil power or storage battery power supply;
Described control system comprises photo-sensitive cell, temperature sensor and controller; Photo-sensitive cell is all connected with the signal input part of controller with the signal input part of temperature sensor; Photo-sensitive cell is used for solar radiation intensity outside sensing chamber; Temperature sensor is for monitoring the intrinsic temperature of rack; Controller is for the break-make of the power supply circuits of the break-make and semiconductor refrigeration system that control battery charging circuit.
2. a kind of autonomous type semiconductor refrigerating rack according to claim 1, is characterized in that, described hot junction flow guide bar (7) comprises the first hot junction flow guide bar and the second hot junction flow guide bar; P-type semiconductor element is connected between the first hot junction flow guide bar and cold junction flow guide bar (9); N-type semiconductor element is connected between the second hot junction flow guide bar and cold junction flow guide bar (9); First hot junction flow guide bar connects battery terminal negative, and the second hot junction flow guide bar connects battery positive voltage.
3. a kind of autonomous type semiconductor refrigerating rack according to claim 1, it is characterized in that, in described cabinet body (1), circulating fan (11) is installed, for promoting the heat exchange of heat in cabinet body and semiconductor refrigeration system (2).
4. a kind of autonomous type semiconductor refrigerating rack according to claim 1, is characterized in that, described cabinet body (1) comprises outside door-plate and internal stent; Outside door-plate and internal stent are that combined type is installed.
5. a kind of autonomous type semiconductor refrigerating rack according to claim 1, is characterized in that, the solar photovoltaic assembly (4) in described energy-storage system is directly set on the outside door-plate of south orientation of cabinet body (1).
6. a kind of autonomous type semiconductor refrigerating rack according to any one of Claims 1 to 5, it is characterized in that, photo-sensitive cell detects solar radiation intensity in real time; Temperature sensor detects the temperature in cabinet body (1) in real time;
Controller, according to the measured value of photo-sensitive cell and temperature sensor, controls the break-make of the break-make of battery charging circuit and the power supply circuits of semiconductor refrigeration system, makes autonomous type semiconductor refrigerating rack simultaneously or three kinds of operating modes below isolated operation:
Accumulation of energy operating mode: when photo-sensitive cell detects that outdoor solar radiation intensity is greater than 0, controller controls battery charging circuit conducting, the solar energy that solar photovoltaic assembly (4) is collected is converted to power storage in battery (5);
Civil power cooling condition: when temperature sensor monitors to the temperature in cabinet body (1) higher than preset value time, controller control civil power be that semiconductor refrigeration system is powered, drive semiconductor refrigeration system run; In hot junction, electric current flows to N-type semiconductor element by P-type semiconductor element, and temperature raises, and to cabinet body (1) outer release heat; At cold junction, electric current flows to P-type semiconductor element by N-type semiconductor element, and temperature reduces, and absorbs heat in cabinet body (1), reduces the temperature in cabinet body (1);
Battery cooling condition: when temperature sensor monitors to the temperature in cabinet body (1) higher than preset value time, controller control battery be that semiconductor refrigeration system is powered, drive semiconductor refrigeration system run; In hot junction, electric current flows to N-type semiconductor element by P-type semiconductor element, and temperature raises, and to cabinet body (1) outer release heat; At cold junction, electric current flows to P-type semiconductor element by N-type semiconductor element, and temperature reduces, and absorbs heat in cabinet body (1), reduces the temperature in cabinet body (1);
Circulating fan (11) is installed, for strengthening the heat exchange of heat in cabinet body (1) and semiconductor refrigeration system (2) in cabinet body (1).
7. a control method for autonomous type semiconductor refrigerating rack, is characterized in that, adopts the autonomous type semiconductor refrigerating rack according to any one of Claims 1 to 5;
Photo-sensitive cell detects and detects solar radiation intensity in real time; Temperature sensor detects the temperature in cabinet body (1) in real time;
Controller, according to the measured value of photo-sensitive cell and temperature sensor, controls the break-make of the break-make of battery charging circuit and the power supply circuits of semiconductor refrigeration system, makes autonomous type semiconductor refrigerating rack simultaneously or three kinds of operating modes below isolated operation:
Accumulation of energy operating mode: when photo-sensitive cell detects that outdoor solar radiation intensity is greater than 0, controller controls battery charging circuit conducting, the solar energy that solar photovoltaic assembly (4) is collected is converted to power storage in battery (5);
Civil power cooling condition: when temperature sensor monitors to the temperature in cabinet body (1) higher than preset value time, controller control civil power be that semiconductor refrigeration system is powered, drive semiconductor refrigeration system run; In hot junction, electric current flows to N-type semiconductor element by P-type semiconductor element, and temperature raises, and to outdoor release heat; At cold junction, electric current flows to P-type semiconductor element by N-type semiconductor element, and temperature reduces, and absorbs heat in cabinet body (1), reduces the temperature in cabinet body (1);
Battery cooling condition: when temperature sensor monitors to the temperature in cabinet body (1) higher than preset value time, controller control battery be that semiconductor refrigeration system is powered, drive semiconductor refrigeration system run; In hot junction, electric current flows to N-type semiconductor element by P-type semiconductor element, and temperature raises, and to outdoor release heat; At cold junction, electric current flows to P-type semiconductor element by N-type semiconductor element, and temperature reduces, and absorbs heat in cabinet body (1), reduces the temperature in cabinet body (1).
8. the control method of a kind of autonomous type semiconductor refrigerating rack according to claim 7, it is characterized in that, circulating fan (11) is installed, for strengthening the heat exchange of heat in cabinet body (1) and semiconductor refrigeration system (2) in described cabinet body (1).
9. the control method of a kind of autonomous type semiconductor refrigerating rack according to claim 7, it is characterized in that, described preset value is 40 DEG C.
10. the control method of a kind of autonomous type semiconductor refrigerating rack according to claim 7, is characterized in that, during mains failure, runs battery cooling condition.
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