69results about How to "Increase the exchange area" patented technology

The invention discloses a culture fluid gas-to-fluid and fluid-to-fluid exchanger that is used for biomimetic tissue cultivation in tissue engineering, an inlet and an outlet of a circular culture fluid are arranged in the chamber of an exchanger shell, an inlet and an outlet of a fresh culture fluid are arranged on the shell, an inlet and an outlet that are used for the fresh culture fluid to pass through and for communicating a hydrophilic hollow fiber semi-permeable biomembrane bunch that implements fluid-to-fluid exchange of the circular culture fluid with the fresh culture fluid are arranged in the chamber, a gas outlet and a gas inlet are arranged on the shell, an inlet and an outlet that are used for gas to pass through and for communicating a hydrophobic hollow fiber semi-permeable biomembrane bunch that implements gas-to-fluid exchange of the circular culture fluid with the gas are arranged inside the chamber, and an airtight space is formed inside the chamber of the shell. Oxygen, carbon dioxide, the fresh culture fluid and the circular culture fluid can finish the gas-to-fluid and the fluid-to-fluid exchange and update inside the exchanger without opening the chamber, and the chamber is closed so as to ensure the pulse-typed circulation of the fresh culture fluid and the circular culture fluid and to support the biomimetic tissue cultivation in tissue engineering.

The invention discloses a low-intensity pulse ultrasound-assisted rotary tubular cell / tissue culture system. The Lipus-assisted rotary tubular cell / tissue culture system comprises a culture main body provided with a rotating shaft, wherein an air chamber is sheathed outside the culture main body, the rotating shaft is arranged at both ends of the air chamber, one end of the culture main body is provided with an Lipus ultrasound instrument, the ultrasound transmitting probe of the Lipus ultrasound instrument is inserted into the culture main body, and the inner wall of the air chamber is provided with an oxygen concentration controlling part. The culture system can realize on-line oxygen supply and liquid supply, thereby being beneficial to the transport of oxygen, carbon dioxide and metabolin in the system and being capable of accurately controlling the oxygen concentration. By using the Lipus ultrasound instrument as an auxiliary means, the invention creates a favorable microenvironment for the proliferation or differentiation of cells or tissues, ultimately simulates the micro-gravity environment for carrying out three-dimensional dynamic culture, and can realize functions of oriented amplification and induced differentiation.

The invention discloses a method for removing heat stable salts. The method can solve the problems that the exchanged area of the ion exchange resin used for removing heat stable salts is small, the exchange speed is slow and the time of the exchange process is rather long in the prior art. The invention adopts the method that the small ball shape ion exchange resin with the diameter of the particle between 0.1-0.17mm is filled in an ion exchange resin tower with the height-to-diameter ratio of four to one-two to one, the amine adsorbent containing heat stable salts with the concentration beyond 0.55mol / L passes through the ion exchange resin tower by the space velocity of 1.0-3.0 / h under the temperature of 20-60 DEG C, when the amine adsorbent solution of the inlet and outlet of the ion exchange resin tower have the same pH value, the regeneration and circulation utilization can be conducted by the ion exchange resin tower.

A method for accumulating cold by dynamic ice includes such steps as loading the mixture of water and the cold medium in the form of liquid colloid deposited under water in a conic energy accumulator, pumping said cold medium from the bottom of said conic energy accumulator into heat exchanger, heat exchanging for cooling it to the temp lower than zero deg.C, holding it in the form of liquid as its setting point is lower than zero deg.C, spraying it into upper water layer in said accumulator by ultrasonic nozzle, and crystallizing the water to form floating ice crystals while depositing said cold medium. Its apparatus is also disclosed.

A total heat exchanging element 10 includes a partitioning component 1, 1 to which a water-soluble moisture-absorbing agent has, been added that is a component partitioning between a first laminar air-flow path 4 and a second laminar air-flow path 5 that are layered; a spacing component 2, 2 that forms the first laminar air-flow path 4 and the second laminar air-flow path 5 and maintains a space between the partitioning components 1, 1; and an adhesive agent 3 that adheres the partitioning component 1, 1 and the spacing component 2, 2. The adhesive agent 3 is a water-solvent-type adhesive agent saturated with a water-soluble moisture-absorbing agent. The partitioning component 1, 1 and the spacing component 2, 2 are made from a liquid-absorbing material that absorbs water and substances dissolved in the water.

The invention relates to a temperature exchanging element made by extrusion and able to receive a heating element and / or heat conducting element, and radiation fins. It is constituted of a single-piece base incorporating an external face equipped with means to receive the radiation fins, and an inner face equipped with at least one means to integrate the heating and / or heat conducting element, said reception and integration means being made during the extrusion of the base. Application to the manufacture of a radiation module, a dryer, an air conditioner, a solar energy collection device.

The invention discloses a modularized forming machine waste heat recovery machine. The waste heat recovery machine comprises a shell and a heat exchange device, wherein the shell is provided with a waste gas inlet, a waste gas outlet, a fresh air inlet and a fresh air outlet; the heat exchange device comprises a heat pipe, a partition plate and fins; the partition plate is arranged on the heat pipe; the fins are arranged on two sides of the pipe body of the heat pipe; the heat pipe is vacuum and is filled with working medium; and the working medium is heat conducting oil. In the waste heat recovery machine, fresh air can be effectively heated by waste heat of the waste gas discharged by a thermal forming machine and then is returned into the thermal forming machine, so that production cost is saved, heat energy recovery rate is increased, matters such as cotton batting, rag and the like included in the waste gas can be filtered, and fire hazard can be eliminated.

The invention discloses a solar heat pump system utilizing a microchannel loop heat pipe. The system comprises a microchannel loop heat pipe module, a heat pump module and a water tank used for connecting the microchannel loop heat pipe module with the heat pump module. The microchannel loop heat pipe module comprises an evaporation end, a heat insulation end and a condensation end. The evaporation end, the heat insulation end and the condensation end are sequentially connected to form a loop. The condensation end is arranged in the water tank. The heat pump module comprises an evaporator, a compressor and a condenser. The evaporator, the compressor and the condenser are sequentially connected through a pipeline to form a loop. The pipeline is provided with a reversing valve and a throttling valve. The cross section of a microchannel of the evaporation end and the cross section of a microchannel of the condensation end are in a circular shape. Grooves are formed in the microchannel of the evaporation end and the microchannel of the condensation end respectively. The solar heat pump system utilizing the microchannel loop heat pipe is simple in structure and high in overall efficiency.

The invention discloses an organic solvent rinsing tower which is especially used for removing dust from an inert gas and cooling and recycling organic solvents (such as ethanol and hexane) in the gas. The organic solvent rinsing tower comprises a rinsing tower shell, wherein a gas inlet is formed in the side wall at the bottom of the rinsing tower shell, a gas outlet is formed in the top of the rinsing tower shell, the opening of the gas inlet faces to the tangential direction of the inner wall of the rinsing tower shell, an upper spray head, a filling layer, a baffle plate, a bubbling dust removal mechanism and a lower spray head are sequentially arranged between the gas outlet and the gas inlet from top to bottom, the filler of the filling layer is strip-shaped or granular, the bubbling dust removal mechanism comprises a liquid storage tank vertical to the axial line of the rinsing tower shell and a liquid layer located in the liquid storage tank, and minipores are densely distributed on the liquid storage tank. According to the invention, by changing the air intake direction and arranging the filling layer, the baffle plate and the bubbling dust removal mechanism, and the exchange area of the gas and the liquid is increased, so as to quickly reduce the temperature of the organic solvent in the gas, significantly improve the dust removal effect and completely recycle the organic solvent in the gas.

The invention discloses a low-temperature adsorbing agent device for a cryogenic pressure container and a production process of the low-temperature adsorbing agent device. The cryogenic pressure container comprises an inner container and an outer container, wherein a process manhole is formed in the middle-lower part of an end enclosure of the inner container, a charging hole corresponding to the process manhole is formed in an end enclosure of the outer container, the low-temperature adsorbing agent device comprises an adsorbing agent cylinder body, wherein the adsorbing agent cylinder body is provided with an upper-part cylinder body section and a lower-part cylinder body section which are equal in inner diameters and different in outer diameters, an end enclosure of the cylinder body is smoothly welded at the open end part of the upper-part cylinder body section, a sieve plate device is welded at the inner side of the open end part of the lower-part cylinder body section, and the outer side of the open end part of the lower-part cylinder body section is welded on the process manhole. According to the low-temperature adsorbing agent device, by increasing the through-flow area, the efficiency of a low-temperature adsorbing agent is enhanced and improved; by improving the structure, the structure stress condition is improved, the hidden danger of the welding quality is eliminated, and the safety of the pressure container is improved; by improving the position arrangement, the operating condition is improved, and the labor intensity is lightened.

The invention provides a double-cone atomization gas-liquid reactor, which belongs to the technical field of chemical equipment. A shell of the reactor is of a top-bottom double-cone structure; a jacket is arranged out of the shell of the reactor; a liquid phase inlet pipe is arranged at the top of the shell of the reactor, and an inlet end of the liquid phase inlet pipe is provided with a solid cone-shaped nozzle; the lower part of the shell of the reactor is provided with a gas phase inlet pipe, and an inlet end of the gas phase inlet pipe is provided with a disc-like gas phase distributor; and a liquidometer is arranged out of an outlet pipe at the bottom of the shell of the reactor. With the double-cone atomization gas-liquid reactor provided by the invention, a dispersing effect of a gas-liquid material in the reactor is improved, liquid is completely atomized by using the nozzle, a gas-liquid exchange area is increased, a conversion rate of gas-liquid reaction is improved, generation of reaction by-products is reduced, reaction time is shortened, polymerization of thermosensitive substances is effectively prevented, operation is easy and convenient, and reaction security is substantially improved.

The invention relates to a sample pretreatment treatment instrument, in particular to a full-automatic liquid-liquid sample treatment instrument. The treatment instrument comprises a solvent conveyingsystem, a separating system, a purifying and concentrating system and a control system; the solvent conveying system consists of a solution supplying system and an injection pump system; the solutionsupplying system, the injection pump system, the purifying and concentrating system and the separating system are separately connected with a main pipeline; the control system is electrically connected with each of the solution supplying system, the injection pump system, the purifying and concentrating system and the separating system respectively. The full-automatic liquid-liquid sample treatment instrument has the advantages of rapidness, easiness and convenience; time and labour are saved, and errors caused by operating by different personnel and transferring a sample frequently can be reduced; meanwhile, the use of a large amount of organic solvent can be avoided so as to reduce the pollution to the environment.

The invention discloses a dialysis device and a micro-universe experimental device including the dialysis device. The dialysis device comprises a dialysis bag and bottom-off centrifugal tubes, wherein each bottom-off centrifugal tube comprises a tube cap and a tube thread; the dialysis bag is distended in a cylinder body, and both ends of the cylindrical dialysis bag are sealed respectively through the tube caps and the tube threads of the bottom-off centrifugal tubes. The micro-universe experimental device includes the dialysis device and a culture container, and the dialysis device is placed in the culture container. The device is used to study the indirect effects of interspecific relationships in aquatic ecosystems and can be applied to scientific experiments and special cultivation of plankton. The dialysis device and the micro-universe experimental device are conducive to conducting relevant researches with scientific value and social benefits.

The invention relates to a high-efficiency culture system for large-scale cell production and culture and an application method. The culture system comprises at least one cell culture bag and at least one cell culture medium storage bag, the cell culture bags are used for culturing cells, the cell culture medium storage bags are used for storing prepared cell culture media and infusing the cell culture media for cell culture of the cell culture bags, the cell culture bags and the cell culture medium storage bags have different specifications, bag bodies are independent at ordinary times, and heat-seal connection and disconnection under an aseptic condition are ensured by an aseptic heat-seal tube sealing machine when cell culture medium infusion is needed. The probability of cell pollution and infection of operators is reduced, operation safety is improved, and cell culture work efficiency is increased.

The invention discloses a sea horse culture pond. A water outlet pipe (3) composed of an outer sleeve (12) and an inner sleeve (15), an attachment base (2) composed of a supporting pipe (7), a U-shaped framework (8) and an attachment mesh (9), an inverted L-shaped aeration pipe (1), a microporous aeration device (4) composed of a three-way pipe (11) and nanotubes (16) connected to the two ends of the three-way pipe (11), a water inlet pipe (6) and a filter screen (5) are arranged in the culture pond (10). According to the sea horse culture pond, the static pond water is changed to circularly flow, so that the feed desire of sea horses can be improved while the activities of sea horses are increased; in combination with the suspended attachment base, faeces and residual feeds can be concentrated, and therefore, the water environment can be cleaned and improved conveniently and the artificial interference on sea horses are reduced; finally, the labor cost is reduced, and the growth rate and the survival rate of the sea horses are increased. The use of the culture pond is helpful for realizing large-scale, healthy and efficient culture of the sea horses.

A total heat exchanging element includes a partitioning component to which a water-soluble moisture-absorbing agent has been added that is a component partitioning between a first laminar air-flow path and a second laminar air-flow path that are layered; a spacing component that forms the first laminar air-flow path and the second laminar air-flow path and maintains a space between adjacent partitioning components; and an adhesive agent that adheres the partitioning component and the spacing component. The adhesive agent is a water-solvent-type adhesive agent impregnated with a water-soluble moisture-absorbing agent. The partitioning component and the spacing component are made from a liquid-absorbing material that absorbs water and substances dissolved in the water.

The invention discloses an energy-saving variable-frequency and variable-speed motor. The motor comprises a main shaft. The external of the main shaft is fixedly provided with a rotor, and a stator isarranged outside the rotor. The stator is fixedly mounted on an inner wall surface of a casing, and a front end axis position of the casing is provided with a bearing seat. The front end of the mainshaft is mounted with the bearing seat in a matched manner by a sliding bearing. An opening is arranged on the rear end of the casing, and a back net is arranged on the opening in a matched manner. Four vertical supporting columns are fixedly disposed on the lower end of the casing. The supporting column is installed in cooperation with a base, and the tail end of the main shaft is provided with aspeed regulating mechanism. The speed regulating mechanism is fixedly arranged with the casing by a mounting plate. The speed regulating mechanism is internally provided with fan blades. The energy-saving variable-frequency and variable-speed motor radiates heat by using the fan blades which can infinitely change speed in the casing, and changes of fan blade rotation speed is independent of changes of main shaft rotation speed, and the fan blade rotation speed is improved without through improving the main shaft rotation speed, and energy consumption is reduced.

The invention discloses an internal heating electromagnetic transducer, which comprises an outer cylinder made of a non-metallic material and a metal heating tube. The outer cylinder is provided withvariable-diameter joints at both ends. Multiple separating shelves are evenly arranged outside the outer cylinder, and an electromagnetic wire is wound on the outer side of the separating shelves. Theheating tube is cylindrical, and is connected with the outer cylinder through non-metallic supports at both ends. The heat energy produced by the heating tube of the structure of the invention can becompletely absorbed by water without loss. The non-metallic tube used in the outer cylinder is a bad conductor of heat, which reduces the loss of heat energy. The temperature of the outer wall of thenon-metallic tube is relatively low, and there is a gap between the electromagnetic wire and the outer wall of the non-metallic tube, so that the temperature rise of the electromagnetic wire will notbe too high. The circulating water has large exchange area and is exchanged fully through heat exchange on the outer wall and inner wall of the heating tube.

The invention discloses a catalyst used for catalytic rectification selective hydrogenation, which includes an organic supporter and a metal catalyst powder embedded inside the surface of the organic supporter. On the total weight of the catalyst, the content of the organic supporter is 20.0-91.85% by weight and the content of the metal catalyst powder is 8.15-80.0% by weight. The metal catalyst powder is 50-100 meshes in particle size. The organic supporter is selected from at least one of the group comprising thermoplastic resin / plastic, thermosetting resin / plastic, rubber and a modified material of the high-molecular polymer. The catalyst, when being used in a catalytic rectification selective hydrogenation technology, is excellent in activity, selectivity, anti-wearing performance, stability and mechanical strength and is better in liquid distribution, can increase a gas-liquid exchange area and a bubbling center, is high in efficiency and is less in liquid holdup. The catalyst has many advantages which are not achieved in a conventional supported catalyst.

The invention discloses a high-efficiency heat dissipation case for a computer, and belongs to the field of computer parts, the high-efficiency heat dissipation case for the computer comprises a heat dissipation case body, the outer end of the heat dissipation case body is provided with a regulation and control type heat dissipation plate, and the regulation and control type heat dissipation plate is arranged on the outer end of the heat dissipation case body; the cooling reactants are condensed after encountering cooling liquid, then the purpose of rapid cooling is achieved, the heat dissipation efficiency in the heat dissipation case body is effectively improved, meanwhile, an adaptive adjusting plate is controlled to move towards the interior of a regulation and control type heat dissipation plate through matched use of a temperature sensing magnetic variable piece and a magnetic push piece, an adjusting air hole is opened, and the heat dissipation efficiency is improved. According to the heat dissipation case, the heat dissipation case body and the outside air exchange area is enlarged, cold air outside the heat dissipation case body can conveniently enter the heat dissipation case body, the ventilation and heat dissipation efficiency in the heat dissipation case body is further improved, damage of high temperature to parts in the heat dissipation case body is effectively reduced, and the service life of the heat dissipation case is effectively prolonged.

The invention provides a lithium battery device with a fin heat dissipation structure. The lithium battery device comprises a lithium battery pack, an electrolytic capacitor connected with the lithium battery pack in parallel, a lithium battery field effect transistor connected with the lithium battery pack in series, a capacitor field effect transistor connected with the electrolytic capacitor in series, and an isolating switch power supply based on a DSP (Digital Signal Processor) module, the electrolytic capacitor is used as an auxiliary backup power supply and is in communication connection with the state monitor; the DSP module is used for controlling whether the electrolytic capacitor is started or not and controlling the working time to maintain the stable power supply of the lithium battery device; an odd number of lithium battery piece accommodating cavities which are arranged side by side are accommodated in the lithium battery pack shell; a phase change material is arranged in the lithium battery piece accommodating cavity; and fin-shaped heat dissipation plates vertical to the long edge direction of the lithium battery pieces are arranged among the plurality of lithium battery piece accommodating cavities. Aging faults of the electrolytic capacitor can be avoided, the service life of the electrolytic capacitor serving as an auxiliary power supply for maintaining stable power supply of the lithium battery device is prolonged, and uninterrupted power supply of the lithium battery pack device is guaranteed.

The invention relates to a filling structure used for a fluid exchanging column. The structure restricts an exchanging surface for at least one liquid phase flowing downwards closely contacted with at least one gaseous phase flowing upwards. The structure is characterized in that the invention comprises multi-row containers formed by pipe bundle consisting of pipes (10); each pipe bundle comprises four pipes (10a to 10d) which respectively form the four direction (D10a to D10d) orientations with a certain angle with the axis line of the structure; the pipes form the passage of the external surface leading to the structure (1).

The present invention provides an oral medicinal composition for peritoneal dialysis patients to suppress an increase of carbonyl compounds and / or advanced glycation / lipoxidation end products (AGEs) in the peritoneal cavity and peritoneal tissue after intraperitoneal administration of a glucose-containing peritoneal dialysis fluid, the oral medicinal composition comprising a pharmaceutically acceptable salt of pyridoxamine as an active ingredient.

The invention relates to the technical field of mechanical devices, especially to a double-positive-pressure adjusting device for surgical breathing equipment. The device comprises: a first connectingpipe and a mounting ring, wherein an annular step surface is arranged in one end of the first connecting pipe, an annular groove is formed in the inner side of the first connecting pipe, an adjustingring is embedded in the annular groove, the adjusting ring is attached to the side wall, protruding relative to the annular step surface, of the end of the first connecting pipe, and a first circulation channel and a second circulation channel are correspondingly formed in the adjusting ring and the side wall; and the mounting ring is mounted at one end of the first connecting pipe, the adjustingring is limited in the annular groove after connection, at least two supports connected with two ends of the inner wall of the mounting ring are arranged in the mounting ring, the supports are arranged in an intersecting mode, filter screens are arranged in gaps, fan-shaped cover bodies capable of being folded and closed are arranged at the tops of the filter screens, and opening and closing of the fan-shaped cover bodies are achieved in the rotating process of the adjustment ring. According to the invention, two different positive pressure values are effectively provided, and the device is high in inclusivity to gas, capable of realizing effective filtration of gas flow and has extremely high safety.

The invention discloses a high-efficiency energy-saving spraying fan for a textile air conditioner. The high-efficiency energy-saving spraying fan comprises a main cylinder body, an air collecting cylinder fixedly connected to one end of the main cylinder body, a motor fixed to one end inside the main cylinder body through a motor bracket, an impeller fixedly connected with a motor shaft, a waterdispersion disc, a water supply pipe and a spray nozzle fixedly installed at the end of the water supply pipe, wherein the water dispersion disc is fixedly connected with the motor shaft and positioned between the motor and the impeller; and the water supply pipe penetrates through the main cylinder body and extends to the side, away from the impeller, of the water dispersion disc. The invention also discloses an operating method of the spraying fan. The high-efficiency energy-saving spraying fan for the textile air conditioner is simple in structure and convenient to implement, water is gradually atomized into a water curtain through the pressure spray nozzle, the water dispersion disc and the impeller, a heat and moisture exchange area is enlarged, and energy is saved.

A metal heat treatment quenching system comprises two sliding beams which are horizontally arranged in parallel, wherein the bottom of each sliding beam is mounted on the ground through two supporting beams, the opposite sides of the two transverse supporting beams are fixedly connected through a mounting strip, and the mounting strip is fixed to the ground through a mounting piece; a drive device slides on the two slide beams and moves left and right below the two slide beams in the horizontal direction, and the front side and the rear side of the drive device are fixedly connected to metal piece lifting mechanisms. According to the metal heat treatment quenching system disclosed by the invention, the drive device, the metal piece lifting mechanism, the heating device and the quenching device are arranged, the metal piece lifting mechanism adjusts the height of a metal piece, and the drive device can drive the metal piece to transversely move left and right, so that the metal pieces can be conducted more rapidly and continuously in each step, and the machining continuity, stability and flexibility of the whole system are improved.

The invention discloses an air heater in a food baking oven. The air heater comprises a baking oven, a heat exchange tube, a fan, and a burner. The heat exchange tube and the fan are disposed in the baking oven. The burner is disposed outside the air heater. The baking oven is provided with an air inlet and an air outlet. The heat exchange tube comprises a heating segment, a radiating segment and a tail gas segment. The heating segment is a linear tube, and one end of the heating segment is communicated with the air inlet. The radiating segment is a bend, and one end of the radiating segment is communicated with the other end of the heating segment. The other end of the heating segment is in transitional communication with one end of a tail gas tube. The tail gas tube is also a bend, and the other end of the tail gas tube is communicated with the air outlet of the baking oven. A nozzle of the burner is disposed inside the heating segment. The fan is disposed on the side wall of the baking oven. Heat exchange efficiency of the heat exchange tube can be improved, tail gas is exhausted from the baking oven, and safety and sanitation of food can be guaranteed.

The invention discloses an energy-saving gas cooker with a fin plate heat exchanger. The energy-saving gas cooker comprises an outer-layer enclosing plate, a return gas enclosing plate, a gas mixing chamber, a burning head and a heat insulating plate. The energy-saving gas cooker is characterized in that fin plates are arranged on the inner side and the outer side of a heat exchanger pipe which is located in a heat exchange zone defined by the heat insulating plate on the inner wall of the lower portion of the outer-layer enclosing plate. According to the energy-saving gas cooker with the fin plate heat exchanger, the advantage that athermal waste gas of a closed gas cooker is exhausted in a room is kept, and meanwhile the exchange area of burning-supporting air and waste heat gas is increased; and the temperature of the burning-supporting air conveyed to the burning head is further increased, and the energy consumption is relatively reduced.

The invention discloses a waste gas residual heat reclaiming system with a metering device. The system comprises a box body and a heat pipe, a partition plate for partitioning the cavity of the box body into a waste gas sub cavity and a fresh air sub cavity is sleeved on the heat pipe, the waste gas sub cavity is provided with a high-temperature waste gas inlet and a low-temperature waste gas outlet, and the fresh air sub cavity is provided with a low-temperature fresh air inlet and a high-temperature fresh air outlet; the evaporation section of the heat pipe is positioned in the waste gas sub cavity, and the condensation section of the heat pipe is positioned in the fresh air sub cavity; an inlet temperature sensor and a Pitot tube are arranged at the low-temperature fresh air inlet, and an outlet temperature sensor for acquiring the temperature of fresh air subjected to heat exchange is arranged at the high-temperature fresh air outlet; and both the fresh air temperature sensed by the inlet and outlet temperature sensors and the fresh air flow rate acquired by the Pitot tube are input to a processor, and the processor is connected with a display device. The system has the advantages of reclaiming the residual heat in the waste gas, converting the high-temperature waste gas into normal-temperature or low-temperature waste gas and then discharging the waste gas, saving energy, facilitating environment friendliness and intuitively expressing energy saving amount.