45 results about "Diurnal temperature variation" patented technology

The invention provides a heat-pump-type energy-storage, power-supply and heat-supply method and device. According to the heat-pump-type energy-storage, power-supply and heat-supply method and device,a refrigerating heat-storage mode and a heat-supply and power-supply mode are included. When the refrigerating heat-storage mode is adopted, normal-temperature work gas is subjected to adiabatic compression through a compressor, then conducts equal-pressure heat release through a heat storage system, then enters a turbine to conduct adiabatic expansion to do external work, then conducts equal-pressure heat absorption through a cold storage system, and finally serves as a cold source supply to be released to the outside world; and the heat-pump-type energy-storage, power-supply and heat-supplydevice is sequentially connected with a gas inlet device, the compressor, a first heat exchanger, the heat storage system, the turbine, a second heat exchanger, the cold storage system and a gas outlet device in series in the moving direction of the work gas; and on the contrary, the heat-supply and power-supply mode is adopted. Through the method and device with the mutually-reversible function of refrigerating heat-storage and power-supply and heat-supply, the problems of wind abandoning and light abandoning in photovoltaic power generation and wind energy power generation are solved, and the problems such as large diurnal temperature variation in the western region is get rid of while heat storage and power supply are achieved; and warm gas is provided for a community while cold gas isprovided for an enterprise or a factory in the daytime and power supplying is conducted in the nighttime.

A hot-melt reflective pavement marking paint with high weather resistance, which is composed of thermoplastic resin, filler, reflective material, pigment and additives, wherein: Among them: thermoplastic resin is C 5 Petroleum resin; the filler is quartz sand and calcium carbonate powder with different particle size distribution; the reflective material is glass beads; the pigment is titanium dioxide or medium chrome yellow; the auxiliary agent is plasticizer, ultraviolet absorber, dispersant, thixotropic agent constitute, of which: The beneficial effect of the invention is that it is suitable for use in high-altitude areas, is resistant to large temperature differences between day and night, has strong anti-ultraviolet rays, and significantly improves the performance of anti-aging and anti-cracking of road marking coatings.

The invention discloses a processing method of power cable temperature on-line monitoring data; through the analyses on main factors affecting the cable surface temperature, the interference components are filtered away for the obtainment of a temperature change rate curve of cable surface without the main interference factors; according to the temperature change rate curve, the cable temperature abnormalities are captured; the processing method of the power cable temperature on-line monitoring data is a new method for processing cable temperature monitoring values; with the adoption of the new method, no temperature field models of cable interior and exterior spaces are established; a data sampling model is rapid to respond; the sampled data precision is high; the waveform is not distorted; the parameters of cable structure, material, environment, laying way and the like are not required to be defined; the frequency domain filtering is performed on the data of the cable surface temperature values for the removal of affection caused by the diurnal temperature change; according to a wave superpositioning formula, the affection of the annual temperature change is removed; and therefore, the generality is better, the precision of judgment on the cable temperature abnormalities by a cable temperature on-line monitoring system can be improved, and the occurrence of power failure and fire accidents resulting from cable head overheating is effectively prevented.

A fuel vapor recovery system and method for an automotive vehicle are disclosed. The vehicle fuel tank is vented to atmosphere via a passageway having a carbon canister to remove fuel vapors, a bladder, and a normally-closed isolation valve. When fueling the vehicle, the gases in the fuel tank displaced by entering fuel are introduced into the carbon canister where the fuel vapors are stored. The isolation valve is commanded to open to allow such flow through the carbon canister. When the vehicle is parked for a period of a day, it undergoes a diurnal temperature change which causes fuel to vaporize into the fuel system. According to an aspect of the present development, the isolation valve remains closed and the gases are contained within the bladder as it expands or contracts as the volume of gases increases or decreases in response to temperature changes.

A fuel vapor recovery system and method for an automotive vehicle are disclosed. The vehicle fuel tank is vented to atmosphere via a passageway having a carbon canister to remove fuel vapors, a bladder, and a normally-closed isolation valve. When fueling the vehicle, the gases in the fuel tank displaced by entering fuel are introduced into the carbon canister where the fuel vapors are stored. The isolation valve is commanded to open to allow such flow through the carbon canister. When the vehicle is parked for a period of a day, it undergoes a diurnal temperature change which causes fuel to vaporize into the fuel system. According to an aspect of the present development, the isolation valve remains closed and the gases are contained within the bladder as it expands or contracts as the volume of gases increases or decreases in response to temperature changes.

The invention discloses a seedling raising and cultivation method for radix campanumoeae. The method comprises the following steps that 1, breeding and seedling raising of the radix campanumoeae are carried out, wherein seeds or branches of mature fruits of good varieties are selected to raise seedlings, and planting is carried out when the height of seedlings is 5-20 centimeters; 2, the planted seedlings are transplanted to a greenhouse or outside to be cultivated, the temperature of the greenhouse or outside is kept to be 10-35 DEG C, the humidity is kept to be 50-95%, dressing of an organichigh-nitrogen-and-potassium humus fertilizer is carried out at the outer portion of roots in a 1-8-month plantlet period, dressing of an organic high-phosphorus-and-potassium humus fertilizer is carried out at the outer portion of the roots in a 9-11-month seedling period, the illumination intensity is controlled to be 15000-60000lx, and the diurnal temperature variation is controlled to be 4-20DEG C. The seedling raising and cultivation method for the radix campanumoeae has the advantages that the bud ratio of the raised seedlings can reach 90% or above; different espalier forms are arranged, thereby effectively improving the photosynthesis of leaves and the ventilation among trees, so that the size of the fruits is big, the yield is improved obviously, and the quantity production of the radix campanumoeae is achieved while the radix campanumoeae is effectively and reasonably protected.

Provided is liquor prepared through Chinese koji saccharification and yeast fermentation. The liquor is processed from sorghum, rice, wheat, corn and sticky rice. A brewing process comprises the following steps of sorting, dosing, material soaking, predistillation, repeated distillation, cooling, Chinese koji saccharification, yeast fermentation, distillatory feeding, distilling and storage. According to the obtained liquor brewing process, the defects that in Hunan, the diurnal temperature variation is small, and the temperature in summer and autumn is high are overcome, the liquor brewing process is especially suitable for being used by indigenous liquor brewing enterprises in Hunan for production, meanwhile, the fermentation period is shortened, the production efficiency is improved, and the operation procedures are simplified; technology unification and popularization are convenient, the quality of traditional liquor is greatly improved, the liquor yield is increased, and the production cost is reduced.

The invention relates to solar power generating equipment which comprises a driving device, a power device, a generator and a storage battery, wherein the driving device comprises a heat exchanger, an energy accumulator and a driving cylinder which are connected through hydraulic tubes and change valves to form a closed-loop driving system, and the system is filled with operating fluid; the power device comprises a power cylinder and a hydraulic motor which are connected through a circulating tube to form a closed-loop power system, and the system is filled with the operating fluid; and a piston in the driving cylinder and a piston in the power cylinder are connected into a whole through a piston rod. In the daytime, the operating fluid in the driving system absorbs solar heat, expands continuously to produce pressure and drives the generator to operate and generate electricity through the driving cylinder, the power cylinder, the hydraulic motor and a transmission device. At night, the operating fluid in the driving system contracts continuously due to temperature reduction to produce negative pressure and drives the generator to rotate reversely and generate electricity through the driving cylinder, the power cylinder, the hydraulic motor and the transmission device. In the invention, conventional mechanical devices can be used for converting solar energy into electric energy by using the natural characteristics of diurnal temperature change and fluid expansion with heat and contraction with cold. The solar power generating equipment not only can be used independently, but also can be used for forming a large-scale generating system. While in use, only simple regular maintenance is needed without any cost. The invention provides a new approach for effectively utilizing solar energy and can produce great economical benefits and social benefits in modern society where low-carbon lifestyle is proposed and energy resource crisis becomes more and more serious.

The invention provides a symbiotic ecological system for fruit trees and earthworms. A greenhouse system provides suitable temperature, humidity and daylighting conditions for the earthworms and the fruit trees, the influence of extreme weather on the fruit trees and the earthworms is avoided, and good growth of the fruit trees and the earthworms is ensured; a fruit tree planting system adopts a high-platform planting mode, which is beneficial for conserving water and soil and promoting the roots of the fruit trees to absorb water and a fertilizer; earthworm breeding systems are arranged amongfruit tree rows, the content of oxygen contained in surrounding soil of the roots of the fruit trees is increased through movement of the earthworms, and biological nutriment is provided for the fruit trees; the fruit trees and the earthworms complement each other and achieve ecological circulation. The planting system is beneficial for manually controlling diurnal temperature variation and increasing content of sugar in fruit, by applying earthworm cast, earthworm feed, fresh crushed earthworms and earthworm leach liquor to the fruit trees, ecological balance is achieved, it is avoided thatheavy metal elements pollute land, the fruit trees and fruit, the obtained fruit is high in sweet degree and rich in various vitamins and anthocyanin, the yield of the bred earthworms is high, and theharvesting period is short.

The invention provides a water collecting desert planting device utilizing diurnal temperature variation. The water collecting desert planting device comprises a sand layer, plant fixing frames, movable plates, vent holes, stone containing cavities, stone separating plates, stone inlets, condensed water outlets, sealing devices, water delivery pipes, balancing weights, water pipe connecting holes,water leaking holes, iron blocks and force bearing protrusions; the plant fixing frames are embedded in the sand layer and are symmetrically arranged. When the temperature of a desert begins to rise,pore cavities can make sponge blocks expand under the effect of heat, the pore cavities can open, that is, water vapor in air can enter the stone containing cavities from the vent holes in the movable plates, the water vapor in air can generate condensed water when meeting low-temperature stones, the generated condensed water can flow out from the condensed water outlets and flow into plant roots, an anti-seepage membrane can collect the condensed water around the plant roots to prevent inside sand from absorbing the condensed water too fast, and thus the moistness around the roots is ensured.

The invention discloses a low-inner-stress high-anti-impact fire-proof ABS composition as well as a preparation method and application thereof. The ABS composition is prepared from the following ingredients in parts by weight: 35 to 75 parts of ABS resin, 15 to 25 parts of fire-proof systems, 10 to 40 parts of elastomers, 5 to 10 parts of modifying agents and 0.1 to 5 parts of coupling agents. Theprepared ABS composition has high toughness, high fire-proof performance and ultralow inner stress, and is very suitable for being popularized and applied to plastic rubber products with metal inserts, fire-proof plastic rubber products with electric plating requirements on the surface and heating welding fire-proof rubber products and in regions with great diurnal temperature variation.

The invention discloses a membrane laying and close planting method for psammosilene tunicoide. The method comprises the following steps: 1, selection and preparation of land: selecting slopes exposed to the sun for red earth or yellow sand as plantation land, deeply overturning and exposing under the sun; 2, disinfection and germination acceleration of seeds; 3, ridging and membrane laying: making a land with high humidity in a land parcel after soil preparation, wherein the land is 80-100 cm wide and 20-30 cm high; utilizing a mulching film with the width being 120-150 cm and directly lay the film on a neat land surface; 4, sowing; 5, thinning and final singling; 6, carrying out field management; 7, harvesting. The field management comprises tillage and weeding, overwinter management, water and fertilizer management, prevention and control over pests and diseases and picking of flower buds. The membrane laying and close planting method for psammosilene tunicoide has the following beneficial effects: topsoil depth of soil is effectively improved; the diurnal temperature variation is increased; water content of soil is stabilized; rate of change of the soil micro-environment is lowered; rapid growth of psammosilene tunicoide is promoted; the incidence rate of plant diseases and insect pests and psammosilene tunicoide is lowered; a continuous cropping obstacle of psammosilene tunicoide is effectively eliminated; and output and quality of psammosilene tunicoide are improved.

The invention provides a warm shed culture method for morchella esculenta in a severe cold area and belongs to the technical field of edible fungus culture. The warm shed culture method for the morchella esculenta comprises the steps of ploughing, sowing, spraying with water, hypha culture, nutrient bag placement, nutrient bag removal, spraying with fruiting acceleration water and fruiting management. According to the warm shed culture method for the morchella esculenta, the morchella esculenta can be produced in two periods of one year, and since a nutrient bag is placed and not covered with a mulching film, the growth condition of the morchella esculenta is more visually observed. According to the method, a cotton quilt covers the exterior of a warm shed, weed growth is inhibited, and the temperature in the shed is adjusted, so that the diurnal temperature variation in the warm shed is small; strain spreading is conducted, the mulching film is not used for covering, the conditions of a fungus bed and the morchella esculenta in the nutrient bag can be observed anytime, atomization and spraying with water can be conducted when the fungus bed is short of water, it is guaranteed that the morchella esculenta grows up under the optimal condition, the yield of the cultured morchella esculenta is high, and the quality of the cultured morchella esculenta is good. According to the embodiment, the one-time production period of the morchella esculenta is three months, two-time production can be conducted every year, and the earnings of each year can reach 34,000-64,000 yuan / mu.

The present invention discloses a method for cultivating field snails in a rice field box manner, comprising the following steps of (1) rice field arrangement: applying organic fertilizer and mixed bacteria to the rice field, ploughing the rice field, exposing the rice field under the blazing sun, spraying sodium hypochlorite solution for disinfection, and digging cultivation furrows along the periphery of the rice field; (2) rice seedlings transplanting: injecting water higher than the soil of the rice field of 5-6cm, applying lime powder and the mixed bacteria to the rice field, and transplanting the rice seedlings in the rice field; (3) cultivation: immerging a net cage in the cultivation furrows of the rice field for cultivation, and transferring the field snails to the room for indoorculture when the pesticide is sprayed, the rice is harvested, or the outdoor temperature is low; (4) daily management: periodically replace the water in the rice field of the cultivation box, using asunshade net when the outdoor temperature is higher than 30 DEG C, keeping the diurnal temperature variation to be not more than 6-8 DEG C for indoor culture, and treating the field snails by using microwaves in the day; (5) disease prevention: applying lime powder to the rice field for disinfection every half a month, and taking the field snails out and washing the field snails with the sodium hypochlorite solution every week.

The invention discloses a four-season universal test sealant and a preparation method and production device thereof and relates to a sealant and a production method and device of the sealant. The sealant is composed of middle molecular polyisobutylene, low molecular polyisobutylene, fumed silica, diethyl silicone oil, poly-alpha-olefin synthetic oil, diester, an antioxidant, a rust inhibitor and apour point depressant. The production device is adjusted according to processes of the production method. The four-season universal test sealant has the advantages of simple processes, a low economiccost, good sealing performances, large viscosity under high temperature conditions and good fluidity under low temperature conditions, is suitable for summer and winter, has large viscosity and goodfluidity when the diurnal temperature variation is large since the turn of the winter and summer, has good viscosity and good fluidity, can be used in all seasons and has a large application range.

The invention provides a vegetation protection structure. The outer surface of the vegetation protection structure is coated with a light reflecting film, and thus cold damage, caused by diurnal temperature variation generated by sunlight irradiation, to a tree in winter can be avoided; hook-and-loop fasteners are arranged on the two sides of the vegetation protection structure, and thus a tree trunk can be directly wrapped; soft strips are arranged at the bottom so that roots can be effectively protected, and a better sealing effect is achieved; insecticide bags are further mounted on the outer side so that the tree can be protected against erosion from ants or pests; and locking structures are exposed from the two ends so that the two ends can be fastened after wrapping, and air leakage or blowing-open by a strong wind is avoided.

The invention provides a bag body pressure adjusting device for a near space aerocraft. The bag body pressure adjusting device for the near space aerocraft comprises a buffering bag, an air passage, a valve and an extractor fan, wherein the buffering bag is connected to the outer wall of a bag body in a sealed way; the air passage is positioned between the bag body and the buffering bag and used for exerting the bag body to communicate with the buffering bag; the valve is arranged in the air passage and used for controlling the air passage to be opened and closed; and the extractor fan is arranged in the air passage. Meanwhile, the invention further provides and a bag body pressure adjusting method for the near space aerocraft. The invention aims at keeping the difference between inside pressure and the outside pressure of the bag body of the aerocraft at a constant value in case of great diurnal temperature change and eliminating risks of deformation of the aerocraft and mechanical fatigue or breakage of the bag body material.

The invention provides a total-heat-exchange fresh air system, and relates to the field of fresh air ventilator systems. The total-heat-exchange fresh air system comprises a fresh air ventilator box,a first air supply tube, a first exhaust tube and phase-change heat-exchange assemblies. The phase-change heat-exchange assemblies are separately arranged on the inner wall of the first air supply tube and the inner wall of the first exhaust tube. The first air supply tube is connected with the fresh air ventilator box, communicates with the fresh air ventilator box, and is used for delivering outdoor air to the fresh air ventilator box after the outdoor air is subjected to first-time temperature change effect through the phase-change heat-exchange assemblies; and the fresh air ventilator boxis used for carrying out second-time temperature change effect on the outdoor air, and the first exhaust tube is connected with the fresh air ventilator box, communicates with the fresh air ventilatorbox, and is used for delivering the outdoor air to an indoor environment after the outdoor air is subjected to third-time temperature change effect through the phase-change heat-exchange assemblies.The total-heat-exchange fresh air system has high temperature regulation and control ability, and can efficiently utilize energy generated by diurnal temperature variation; load is further reduced; and energy conservation and emission reduction are achieved.

The invention provides a cutting seedling method for syzygium aromaticum. The method includes steps of A, cutting slip selection; B, cutting preparation; C, cutting operation; D, treatment after cutting operation. According to the invention, semi-lignified twigs are selected as slips, so that the rooting percentage is increased compared with a method adopting hard branches as slips. The lower ends of the slips are immersed with growth regulation agents before cottage and the growth regulation agent is added in substrate around the slips after the slips are connected to a seedbed through cuttage. Due to the effect and influence on the lower ends of the slips by the growth regulation agent, the activity and rooting percentage of the slips are enhanced substantially. Water is sprayed to the slips intermittently, so that humidity in a shade can be kept effectively and rooting of the slips is promoted. Through heating treatment on the seedbed, influence on the slips by diurnal temperature variation can be prevented and a normal rooting environment for the slips can be ensured.

The invention discloses a ring main unit used in areas with high diurnal temperature variation, which comprises a shell, a heat insulation layer, a processor, an automatic lifting device and a radiating fan. The heat insulation layer is arranged on the inner side of the shell, and the heat insulation layer is connected to the shell by pasting. The automatic lifting device is arranged on the lowerside of the radiating fan. A main control box is arranged on the inner side of the shell, and the main control box is equipped with the processor. A wire is arranged between the processor and the automatic lifting device and the radiating fan. Because of the use of the automatic lifting device and the radiating fan, the ring main unit has a simple installation structure and high efficiency. When the ring main unit works in daytime, the automatic lifting device lifts the radiating fan, and the radiating fan discharges the heat in the ring main unit, so that the damage of the ring main unit is prevented, and the working efficiency of the ring main unit is improved. Because of the use of the heat insulation layer, when the ring main unit works at night, the automatic lifting device automatically drops, the heat insulation layer keeps the ring main unit warm, and thus, the service life of the ring main unit is improved.

The invention discloses anti-cracking unsaturated polyester paint and a preparation method thereof. The anti-cracking unsaturated polyester paint is prepared from the following raw materials in partsby mass: 25 to 40 parts of unsaturated polyester resin, 5 to 10 parts of short oil modified alkyd resin, 0.1 to 1 part of dispersing agents, 0.1 to 1 part of anti-foaming agents, 0.1 to 1 part of leveling agents, 0.3 to 0.6 part of fused silicon oxide, 40 to 60 parts of pigments and fillers and 5 to 30 parts of solvents. The anti-cracking unsaturated polyester paint has the advantages that the product toughness is good; the internal stress release is fast; the problem of cracking at the later period can be greatly reduced to the maximum degree. Compared with the PE paint in the market, the paint has the advantages that the use tolerance is better; the anti-cracking unsaturated polyester paint is very suitable for being used as easy-shrinkage substrates suitable for Northeast China regionswith great diurnal temperature variation; for other performance, the smell is lower than that of other PE paint in the market; the grinding is easy; the plate surface effect is good; the fullness degree is high; the glossiness is higher; the comprehensive performance is excellent.

The invention relates to the technical field of wallpaper, in particular to room temperature adjustment wallpaper. The room temperature adjustment wallpaper comprises a base material and a face layer, and the face layer is positioned above the base material and formed by close compounding of a nonwoven fabric layer, a pattern layer and a protection layer sequentially from bottom to top. A room temperature adjustment microcapsule layer is arranged between the base material and the nonwoven fabric layer and adhered between the base material and the nonwoven fabric layer. Each microcapsule comprises a capsule wall and a fatty acid compound packaged in the capsule wall, wherein a phase transition temperature of the fatty acid compound is 18-23 DEG C, and the capsule wall is a rigid capsule wall. The room temperature adjustment wallpaper has advantages that when the indoor temperature is increased and higher than the phase transition temperature, the fatty acid compound absorbs and stores indoor heat; when the indoor temperature is decreased and lower than the phase transition temperature, the fatty acid compound releases heat to adjust the indoor temperature, so that indoor diurnal temperature variation is reduced, and high practicality is realized.

The invention discloses a phase-change heat-storage-type salt water desalting device based on a diurnal temperature variation and a using method. The phase-change heat-storage-type salt water desalting device comprises a water supplying device, a phase-change heat storage device, a sleeve and a water storage tank. The phase-change heat storage device is a solar energy heat collection and storage device which uses a phase-change material as a heat storage working medium. A salt water desalting method comprises the following steps: while receiving illumination at daytime, converting solar energyto heat energy for storing by the phase-change material; at night, salt water to be processed is heated to a certain temperature through a copper pipe in the heat storage device and flows into an inner pipe of the sleeve, part of the heated salt water is evaporated into water vapor, is condensed when encountering the inner wall of the outer pipe with a low temperature and is converged in the outer pipe, then flows to the water storage tank through the outer pipe. The heat storage device can store a large amount of heat and heat the salt water to the higher temperature. The salt water of whichthe temperature is reduced can be reflowed and reheated, so that a purpose of maximally using the heat is achieved. The device is capable of, through developing an efficient photo-thermal conversionphase-change heat storage material, improving a solar radiation utilization ratio, and reducing energy consumption for unit fresh water.

The invention belongs to the technical field of PVDF thin membranes, and particularly relates to a high-toughness PVDF thin membrane material and a preparation method thereof, a TPT back membrane, a TPE back membrane and a solar cell panel. The high-toughness PVDF thin membrane material is prepared from, by weight, 60%-70% of PVDF, 5%-20% of PMMA, 10%-20% of titanium dioxide, 0-10% of a flexibilizer, 0-0.5% of an antioxidant and 0-0.5% of an ultraviolet absorbent, wherein the flexibilizer is a polymer with the glass transition temperature lower than or equal to T, and T is greater than or equal to 0 DEG C and less than or equal to 25 DEG C. By adding the flexibilizer with the glass transition temperature lower than or equal to the normal temperature, a PVDF thin membrane still has certaintoughness at the normal temperature or the low temperature, and therefore the degree of thermal expansion and cold contraction of the PVDF thin membrane material is reduced. Due to the toughness, adapting to the temperature change, of the PVDF thin membrane material, the PVDF thin membrane material can be suitable for environments with the large diurnal temperature variation, especially the conditions, with the large diurnal temperature variation, similar to the desert environment.

The invention discloses a method for improving the yield of cucurbita pepo. The method includes the following steps that a ridge mulched drip irrigation planting mode is adopted, seeds are disinfected, ultraviolet irradiation is conducted at the seedling stage, artificial supplementary pollination is adopted at the flowering stage, and diurnal temperature variation and the like is controlled. By the detail design of each growth link in the growth period of the cucurbita pepo, these methods promote one another, and the yield and quality of cucurbita pepo are improved.

The invention belongs to the technical field of information processing devices, and specifically relates to an Internet-based big data information processing device. The device comprises a processor body, heat exhaust fans and a heat preservation shield, wherein the heat exhaust fans are arranged at two ends of the bottom end of the processor body, and the processor body is externally sleeved withthe heat preservation shield; the internal part of the heat preservation shield is divided into a first gas guide cavity and a second gas guide cavity through the heat preservation shield, the secondgas guide cavity is internally provided with a gas guide shield, and the gas guide shield is internally provided with a gas conversion block; the gas conversion block is rotatably arranged in the heat preservation layer through a rotating column, and the gas conversion block is provided with a gas guide groove; and two sides of the heat preservation shield are provided with hot gas transfer devices. The device can be effectively applied for areas with a great diurnal temperature variation through the cooperation of the gas conversion block and the hot gas transfer devices,. The processor bodygenerates a lot of heat during the operation because the temperature is too high in the daytime when the processor body is in operation and thus affects the function of normal operation of the processor.

The invention relates to a ring main unit used in a region high in day-night temperature difference variation. The ring main unit comprises a cabinet body, a heat exchange plate arranged at the upper end of the cabinet, and a plurality of hollow attachment blocks capable of being attached to the upper surface of the heat exchange plate respectively. Each attachment block is filled with a solid-liquid phase change material; one end of one vertical rod is fixed to the middle of the upper end of the cabinet body, and the other end of the vertical rod penetrates through the heat exchange plate; the attachment blocks can rotate up and down with the vertical rod as a center respectively, and the adjacent attachment blocks are not overlapped mutually. According to the ring main unit used in the region high in day-night temperature difference variation, the characteristic that the day-night temperature difference variation of the region is high is utilized, the diurnal heat is absorbed, and the heat is released at night, so that the problem that the variation of the day-night temperature in the ring main unit is high is alleviated without the need of too many energy sources, the use cost is low, the structure is simple, and the ring main unit runs stably.

The invention discloses black tea processing method which comprises the following steps: (1) selecting fresh leaves; (2) withering; (3) rolling; (4) fermenting; (5) sterilizing; (6) drying; (7) packaging; (8) curing; and (9) increasing aroma. The withering is performed at a constant temperature, the defect that the method is influenced by weather and diurnal temperature variation is overcome, and the fresh leaves can be uniformly withered; an ultraviolet sterilization step is increased after fermentation, so that some microbial bacteria produced during fermentation can be killed; the tea is refrigerated and cured after packaging, so that the beneficial components of the tea are further developed; and static high-temperature aroma improving is performed after packaging and curing, so that the conditions that the tea leaves are collided to damage the tea shape and the tea aroma is volatilized can be avoided. The tea made by the method disclosed by the invention is high in quality, stable in quality, strong in aroma, red and transparent in soup after making and mellow in taste.