407 results about "Gas heating" patented technology

The invention relates to a molten salt groove type heat collecting device, an operation method of the molten salt groove type heat collecting device and a molten salt groove type photo-thermal power station, and belongs to the field of molten salt groove type photo-thermal power stations. The heat collection mechanism comprises a plurality of heat collectors which are connected in series through pipelines to form a heat collector group, and the two ends of the heat collector group are communicated to the molten salt tank; the heat collector set is arranged in a U shape, a pipeline at the bottom of the U shape is a middle jumper pipe, and the middle jumper pipe is located at the highest position. And a gas outlet of the gas heating mechanism is communicated with the middle jumper pipe. The two ends of the U-shaped heat collector set are communicated with the fused salt tank, the highest position of the heat collector set is communicated with the gas heating mechanism, heating and salt injection can be conveniently conducted on the heat collectors, the automation degree is high, and convenience and rapidness are achieved.

The utility model relates to the technical field of coke oven heating, in particular to a mixed gas heating single-hole combustion chamber temperature adjusting system which comprises adjusting units, one end of each adjusting unit is connected with a mixed heating gas main pipe, and the other end of each adjusting unit is connected with a corresponding waste gas shutter. And the mixed coal gas sequentially passes through the mixed heating coal gas main pipe, the corresponding adjusting unit, the corresponding waste gas opening and closing device and the corresponding heat storage chamber to enter the corresponding combustion chamber. The utility model has the advantages that: the original gas heating pipeline is improved, and the regulating valve is connected with the gas heating pipeline in parallel on the basis of not changing equipment (the equipment comprises the regulating cock, the pore plate box and the exchange cock) on the gas heating pipeline, so that the independence of manual regulation is ensured, and the gas heating pipeline is convenient to use. The furnace temperature adjusting effect of each combustion chamber during mixed gas heating is improved; and various pore plates with different diameters are arranged in the pore plate box, so that the requirement of manual adjustment can be met.

The invention relates to a flameout control method, system and equipment for a gas heating water heater and a medium. The gas heating water heater comprises a sealed combustion system, a Venturi mixer and a pneumatic gas valve which are sequentially communicated, and a command valve of the pneumatic gas valve is connected to an air purification bin of the sealed combustion system through an air pressure pipe. The method comprises the following steps: in a whole machine debugging stage, setting the pressure of a zero-position adjusting spring of a command valve of the pneumatic gas valve to be a negative value; in the operation stage of the water heater, whether the combustion flame is out of flame or not is determined based on the ratio of the gas flow to the air flow; the pneumatic gas valve is closed by the controller in response to a combustion flame off-flame stall. When the smoke pipe is seriously blocked, the pneumatic gas valve can be closed, so that the whole machine is shut down, and the gas heating water heater is protected.

The utility model relates to the technical field of coke oven heating, in particular to an economical single-hole combustion chamber temperature adjusting device, which is characterized in that the input end of each heating gas unit I and the input end of each heating gas unit II are respectively connected with a heating gas main pipe; the output end of each first coal gas heating unit and the output end of each second coal gas heating unit are connected with the corresponding combustion chamber, one end of each adjusting unit is connected with the corresponding first coal gas heating unit, and the other end of each adjusting unit is connected with the corresponding second coal gas heating unit. The utility model has the advantages that the structure realizes the communication of the two heating gas main pipes, one regulating valve can be adopted to complete the flow regulation of the two gas heating pipes in the same combustion chamber, and the on-line maintenance and manual regulation are realized by changing the opening position of the T-shaped plug valve; the regulating valve is connected with the stop valve through the three-way connector, it is guaranteed that the regulating valve can be detached at any time when breaking down, and normal production is not affected.

The invention discloses a high-temperature stable gas heat conduction temperature control method and system, and relates to the technical field of temperature control. The system comprises a high-temperature inert gas loop, a gas circulation driving module, a gas heating module, a gas heat exchange module, a gas cooling module, a gas purification and supplement module and a precise temperature sensing and control module. The high-temperature inert gas loop is configured as a closed circulation path and is used for bearing high-purity inert gas as a heat carrier; and the gas circulation driving module is arranged in the high-temperature inert gas loop and is used for driving the high-purity inert gas to continuously and circularly flow in the closed circulation path. By adopting high-purity inert gas as a heat-conducting medium and combining precise circulation driving, multi-stage heating, efficient heat exchange, active cooling, online purification and intelligent control technologies, the problems that an existing liquid heat-conducting medium is unstable in phase change at a high temperature, a metal eutectic medium is poor in safety, and a composite system is high in complexity are solved.

To provide a technique capable of improving a deposition rate when forming a silicon-containing film at a low temperature.SOLUTION: According to an aspect of the present disclosure, there is provided a film forming method including loading a plurality of substrates into a process container, heating an inside of the process container by a container heating unit provided around the process container, and heating a first precursor gas in a first gas nozzle by a gas heating unit included in the first gas nozzle. And repeating a cycle a plurality of times, the cycle including supplying the heated first precursor gas from the first gas nozzle into the process container, supplying a first reaction gas that reacts with the first precursor gas from a second gas nozzle into the process container, supplying the first precursor gas, and supplying the first reaction gas.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of coke oven heating, in particular to a coke oven gas heating single-hole combustion chamber temperature adjusting system which comprises adjusting units, one end of each adjusting unit is connected with a heating gas main pipe, and the other end of each adjusting unit is connected with a corresponding combustion chamber. The utility model has the advantages that the regulating unit is connected with the combustion chamber gas heating pipeline in parallel, so that the regulating valves are additionally arranged on the two sides of the pore plate box while the original function of the pore plate box is reserved, and the temperature regulating effect is improved; the function of an original pore plate box is reserved, when the opening of the adjusting valve is too large or too small and cannot be adjusted, an operator can change the opening of the adjusting valve by changing the pore plate in the pore plate box, and operation is easy and easy to achieve; the number of the regulating valves of the regulating unit of each coke oven is large, and the regulating valves are arranged on the small-size pipeline connected with the gas main pipe in parallel, so that the caliber of each regulating valve is greatly reduced; the size of the regulating valve is reduced, so that the gas consumption of each regulating valve is reduced, and the energy consumption is greatly reduced.

The invention belongs to the technical field of carbon neutralization, and discloses a synergistic efficient low-carbon electrolysis water and total-oxygen blast furnace coupled low-carbon steel coproduction system. Comprising an electrolyzed water system; a blast gas inlet of the total-oxygen blast furnace system is connected with an oxygen outlet of the electrolyzed water system, and the total-oxygen blast furnace system is used for receiving oxygen to generate top circulating coal gas rich in carbon monoxide and carbon dioxide; an inlet of the coal gas purification system is connected with a circulating coal gas outlet of the total-oxygen blast furnace system; a first inlet of the methanol synthesis system is connected with a hydrogen outlet of the water electrolysis system, a second inlet of the methanol synthesis system is connected with a purified gas outlet of the gas purification system, and the methanol synthesis system is used for receiving hydrogen and purified circulating gas to generate methanol; the circulating gas heating system is arranged in a circulating gas path between the gas purification system and the total-oxygen blast furnace system and is used for heating circulating gas returned to the blast furnace; an inlet of the flue gas decarburization system is connected with a combustion flue gas outlet of the circulating gas heating system, and the flue gas decarburization system is used for conveying carbon dioxide in the flue gas to the second inlet.

The invention relates to the technical field of heating equipment, and discloses a control method and device of gas heating equipment, a controller and the gas heating equipment. In response to the fact that the gas heating equipment is switched from a flameout state to a combustion state, if the set heating water outlet temperature is larger than the first temperature, the gas heating equipment is switched to the combustion state; if yes, the gas heating equipment is controlled to operate with the set heating water outlet temperature as the target heating water outlet temperature and reach the first preset duration, and the set heating water outlet temperature is the heating water outlet temperature set based on the heating requirement; and after the gas heating equipment operates by taking the set heating water outlet temperature as the target heating water outlet temperature for a first preset duration, the gas heating equipment is controlled to operate by taking the preset heating water outlet temperature as the target heating water outlet temperature. Therefore, smoke leakage caused by the fact that condensate water in the water seal device is completely evaporated is avoided, after the condensate water in the water seal device is evaporated, the condensate water in the water seal device is supplemented to maintain the amount of the condensate water in the water seal device, and the sealing effect of the water seal device on smoke is guaranteed.

In a case where a hot-gas heating operation mode is continuously operated, control of a refrigerant circuit that enables efficient consumption of energy of a compressor (rotation number control of the compressor) is executed. The vehicle air-conditioning device includes a refrigerant circuit that depressurizes refrigerant discharged from a compressor and returns the refrigerant to the compressor, a vehicle cabin air-conditioning device that temperature-adjusts air blown into a vehicle cabin through an indoor heat exchanger of the refrigerant circuit, and a control device that controls the refrigerant circuit and the vehicle cabin air-conditioning device on the basis of input information. The refrigerant circuit includes a refrigerant flow path that has a hot-gas bypass path that depressurizes a portion of refrigerant compressed in the compressor without passing through the indoor heat exchanger and flows the refrigerant to a suction side of the compressor, and enables the hot-gas heating operation mode. The control device, in the hot-gas heating operation mode in which the portion of the refrigerant compressed in the compressor flows to the indoor heat exchanger and the remaining refrigerant flows to the hot-gas bypass path, executes control of variably setting a target pressure of the refrigerant circuit in a range in which a heating requirement can be maintained, in consideration of a necessary capacity obtained on the basis of a set heating requirement and a vehicle requirement.

The utility model relates to the technical field of gas heating, in particular to a combustor outdoor installation type high-power gas radiation heating device which comprises an installation plate, one side of the installation plate is connected with four groups of radiation heating device bodies which are mutually symmetrical, and a plurality of groups of radiation frames are arranged at the ends, away from the installation plate, of the radiation heating device bodies. When a radiant tube with gas leakage needs to be maintained and replaced, a sliding plate slides along an adjusting groove, so that a positioning pin is pulled out of a positioning hole formed in a mounting rod, then the mounting rod slides along a mounting groove, the mounting rod is moved out of the mounting groove, dismounting of the radiant heating device body is completed, then a limiting bolt is rotated, and the radiant tube with gas leakage can be maintained and replaced. When the radiant tube needs to be replaced and maintained, limiting of the limiting plate by the limiting bolt is relieved, then the limiting plate slides to be pulled out of the fixing sleeve, and then the radiant tube needing to be replaced and maintained is taken out of the radiant frame, so that the radiant tube is conveniently maintained.

The utility model relates to the technical field of gas heating, and discloses a heat source structure and a fluidization crystal transformation device. The heat source structure comprises a pipeline which is provided with a channel penetrating in the axial direction of the pipeline, and the channel is used for gas to pass through; the heating assembly is used for heating the pipeline; wherein the channel is internally provided with filler, the filler is provided with a gap, and gas can be discharged from the gas outlet of the channel through the gap. The fluidization crystal transformation device comprises a furnace body and a heat source structure. According to the technical scheme, the technical problem of high energy consumption of a device for preparing anhydrous iron phosphate in the prior art can be solved.

The invention relates to the technical field of traditional Chinese medicine extraction and concentration, and discloses an efficient and energy-saving traditional Chinese medicine micro powder extraction and concentration system. Firstly, plant cell walls are fully destroyed through a traditional Chinese medicine micro-powder wall breaking technology, and complete and quantitative conveying of micro-powder materials is ensured in combination with an air pressure balance residue removing system which is arranged in a storage tank and composed of an air disc, an air blowing pipe and an air blowing plug. And secondly, direct contact type hot air heating and stirring are adopted in the extraction tank, and a two-stage dust suppression structure of spraying and wet dust removal is arranged, so that efficient extraction and dust control are realized. And finally, the system recycles the residual components of the decoction dregs through a secondary extraction process, and adopts a membrane filtration and membrane concentration technology to replace the traditional heating concentration, so that the filtration and concentration of the decoction are completed at normal temperature. The method effectively solves the problems of low extraction rate, high energy consumption, easy damage of thermosensitive components and dust pollution in the traditional process, and realizes high efficiency, energy conservation and high quality of production of the traditional Chinese medicine extraction preparation.

The invention discloses a furnace top gas cyclic reforming process and system, and the reforming process comprises the following steps: S1, heating furnace top gas generated by a blast furnace to 1000-1200 DEG C to obtain high-temperature gas; s2, mixing the high-temperature coal gas with coal, and carrying out electromagnetic induction heating coal gas reforming reaction to generate reduced coal gas which is 900-1000 DEG C and contains CO and H2; s3, performing plasma heating on the reduced gas to 1400-1800 DEG C to obtain high-temperature reduced gas; s4, recycling the high-temperature reduction coal gas to the lower part of the blast furnace for circular treatment; according to the method, a carbon capture device of a conventional oxygen blast furnace and a top combustion type gas heating furnace and a CO2 removal device of a carbon circulation blast furnace are replaced by circular reforming of the furnace top gas, so that the energy consumption and the equipment investment of the technological process are reduced.

The invention relates to the technical field of photovoltaic cell manufacturing equipment, and particularly discloses a TOPCon cell sintering furnace. In order to solve the problems that a traditional tunnel furnace or a vertical sintering furnace is generally high in energy consumption, waste gas generated after high-temperature sintering is directly discharged, and energy is wasted, the sintering furnace comprises a furnace body, a heating element, a bearing rotating mechanism and a gas circulating pipeline, and the interior of the furnace body is separated from top to bottom and communicated with a gas heating chamber and a sintering working chamber; the heating element is arranged in the gas heating chamber and is used for feeding the heated gas into the sintering working chamber below; the bearing and rotating mechanism is arranged in the sintering working chamber and used for bearing and driving the battery piece to move; the inlet end of the gas circulation pipeline communicates with the exhaust port of the sintering working chamber, the outlet end of the gas circulation pipeline communicates with the gas inlet of the gas heating chamber, and the gas circulation pipeline is used for guiding gas obtained after heat exchange in the sintering working chamber back to the gas heating chamber to be reheated and recycled. The situation of energy waste caused by heat loss in the sintering furnace can be reduced.

This invention relates to the field of carbon nanotube preparation equipment technology, and particularly to a gas heating device, a fluidized bed reactor, and a method for preparing carbon nanotubes. The gas heating device includes a heating tube through which a carrier gas flows, and a heating component for heating the carrier gas is fitted over the heating tube. This invention provides a fluidized bed reactor with a reasonable overall structure, convenient installation, and good practicality and potential for large-scale promotion. Specifically, this invention uses electromagnetic induction to uniformly heat the entire heating tube, thereby rapidly and stably heating the carrier gas to a set temperature, ensuring a uniform temperature field distribution within the reaction chamber, and effectively improving the consistency of carbon nanotube growth and product quality. Furthermore, by eliminating traditional resistance wire heating, problems such as high-temperature aging and burnout of the resistance wire are avoided. The equipment has no easily damaged parts, resulting in a low failure rate, reduced maintenance costs, and a significantly extended service life.

The invention belongs to the technical field of blast furnace ironmaking, and particularly discloses a system for improving heat transfer efficiency of HyCROF furnace gas heating furnaces, which comprises a blast furnace, three heating furnaces are connected in parallel on the blast furnace, two hot blast valves are connected in series on each communicated pipeline, each heating furnace is provided with a combustion air valve, a cold gas valve and a steam valve, and two flue gas branch pipes are arranged at the lower part. One flue gas branch pipe is communicated with a chimney, a flue valve, a flue thermocouple and a CO and O2 gas detector are arranged on a communicating pipeline, a waste gas inlet valve, a self-circulating fan and a waste gas outlet valve are arranged on the other flue gas branch pipe, an outlet pipeline is communicated with a coal gas branch pipe, a coal gas valve and a combustion valve are arranged on the coal gas branch pipe, and a thermocouple is arranged at the top of the heating furnace. The carbon deposition generated in the coal gas heating process is cleaned, so that the heat transfer efficiency of the coal gas heating furnace is effectively improved, and the problems that the heat transfer efficiency of the coal gas heating furnace is reduced and temperature distribution is uneven due to the fact that carbon deposition is formed by coking in holes of the checker bricks of the coal gas heating furnace are solved.

The invention relates to the technical field of organic steam recovery, in particular to a high-temperature dust-containing organic steam recovery device which comprises a primary filtering device, a secondary filtering device, a horizontal storage chamber, a spiral winding type heat exchanger, a vacuum pump system and a tail gas treatment device which are sequentially connected. The first-stage filtering device is a conical tank body provided with a first heating pipeline interlayer, a pulse bag-type dust collector is arranged in the first-stage filtering device, and a pulse gas heating device connected with the pulse bag-type dust collector is arranged outside the first-stage filtering device; the secondary filtering device is a cylindrical tank body provided with a second heating pipeline interlayer, and an industrial dust filter is arranged in the secondary filtering device; the horizontal storage chamber comprises a steam pre-cooling partition section and a liquid recovery partition section which are separated by a sealing partition plate; a spiral steam flow guide pipe is arranged in the spiral winding type heat exchanger. According to the invention, the recovery efficiency of the high-temperature dust-containing organic steam is improved.

The invention relates to the technical field of water source heat pumps, and particularly discloses a water source heat pump device applied to a sewage plant, the water source heat pump device comprises a supporting bracket, the top of the supporting bracket is fixedly connected with a suspended matter cleaning device, one side of the suspended matter cleaning device is fixedly connected with a sewage treatment box body, and one side of the sewage treatment box body is provided with an access hole; the side, away from the access hole, of the sewage treatment box body is fixedly connected with a scum cleaning box body, the bottom of the scum cleaning box body communicates with a first valve body water inlet through a pipeline, and the part, located at the bottom of the scum cleaning box body, of one side of the sewage treatment box body communicates with a gas heating mechanism through a pipeline; according to the water source heat pump device applied to the sewage plant, waste heat in the sewage is recycled while the sewage is purified, meanwhile, hot air flows into a water body through the air heating mechanism, so that heat generated by the sewage is decomposed through thermophilic aerobic bacteria, and meanwhile the heat of the hot air flows can be efficiently recycled.

The invention belongs to the technical field of hydrogen energy production, and relates to a semi-coke tail gas chemical looping continuous hydrogen production device and method. The system comprises a semi-coke tail gas purification unit, a semi-coke tail gas heating unit, a water vapor heating unit, a plurality of reactors and a hydrogen condenser, wherein the reactors are filled with oxygen carriers; an outlet of the semi-coke tail gas purification unit is respectively connected with inlets of the plurality of reactors through the semi-coke tail gas heating unit, an outlet of the water vapor heating unit is respectively connected with the inlets of the plurality of reactors, and outlets of the plurality of reactors are connected with an inlet of the tail gas condenser. According to the invention, a chemical looping hydrogen production technology is combined with the resource utilization of the semi-coke tail gas, so that the resource utilization of the semi-coke tail gas can be realized, and high-purity hydrogen can be produced. The chemical-looping hydrogen production technology has the advantages of low energy consumption, high efficiency, easiness in control and the like, and the separation energy consumption in the high-purity hydrogen production process can be reduced by utilizing the semi-coke tail gas chemical-looping hydrogen production.

A direct reduction system and method utilizes a direct reduction shaft furnace to reduce iron oxide using reducing gas received from a reduction / recirculation gas loop. An electro-gas heating system, located in the reduction / recirculation gas loop, heats the reducing gas with supplemental hydrogen and / or natural gas before introducing it into the shaft furnace. The gas heating system sequentially includes: a primary gas heating unit that first heats the reducing gas to a temperature below 600°C or above 700°C using a direct or indirect heating mechanism to avoid carbon buildup in the gas heating system; and a secondary gas heating unit that secondarily heats the reducing gas to a temperature of 900°C to 1100°C using a direct heating mechanism.

Disclosed is a novel technology for applying SOEC in a direct reduction process in which a shaft furnace is used. A hydrogen reduction system according to the present disclosure has a shaft furnace, a reducing gas supply device, a reducing gas heating device, a source material pretreatment device, and a hydrogen production device. In this hydrogen reduction system, a reducing gas is supplied to the shaft furnace via the reducing gas supply device and the reducing gas heating device, and a 600°C to 900°C iron oxide source material is supplied to the shaft furnace via the source material pretreatment device. The hydrogen production device has an SOEC, and the SOEC uses a steam-containing gas which has been discharged from the shaft furnace to produce hydrogen gas. The hydrogen gas produced by the SOEC is used as a reducing gas.

The present application belongs to the technical field of inside drying of medicine bottles, and particularly relates to a drying device for medicine bottle production, which comprises a rotary automatic air supply mechanism, a rotating mechanism and a rotary air distribution mechanism, the rotary automatic air supply mechanism is arranged on the rotating mechanism, and the rotary air distribution mechanism is arranged below the rotating mechanism. The rotary automatic air supply mechanism is provided, the height of the lower surface of the drop track fluctuates, the lifting shell below the target medicine bottle can be automatically lifted to combine with the target medicine bottle, and the opening and closing of the air supply valve can be automatically controlled; the automatically opened and closed valve, the dehumidification of the warm air and the reflux system are matched with each other, the circulation of the warm air can be realized, and the power consumption required for gas heating is reduced.

The utility model discloses an energy-saving gas heating device, which belongs to the technical field of gas fan heaters and comprises a frame, a box body and a control box, the frame and the box body are detachably fixed through bolts, the control box and the outer wall of the box body are fixedly mounted through bolts, and a combustion chamber and a heat exchange chamber are symmetrically arranged on two sides in the box body; the combustion chamber and the heat exchange chamber are separately designed, the spirally stacked heat exchange bent pipes are arranged in the heat exchanger, high-temperature gas after combustion is introduced into the heat exchange bent pipes, spiral rising is achieved, air entering from the bottom in the heat exchange chamber fully makes contact with the heat exchange bent pipes for heat exchange, and then the air rises; in this way, the circulation time of the high-temperature gas in the heat exchanger is greatly prolonged, then heat can be sufficiently exchanged into natural air, efficient utilization of heat energy is facilitated, and fuel gas energy consumption is reduced.

The present invention belongs to the technical field of water heating apparatuses. Disclosed are a dual-energy water heating apparatus and a control system therefor, which are used for solving the problems of low heat exchange efficiency, excessively complex control and low intelligence of existing dual-energy water heating apparatuses combining gas heating and heat pump heating. The dual-energy water heating apparatus in the present invention is provided with a separate gas heating system and a separate heat pump heating system, and is also provided with two independent heat exchange systems. The two heating systems do not interfere with each other and can perform individual heating or combined heating, thereby simplifying the operation control of the dual heating systems. Moreover, using two sets of heat exchange systems to perform respective heat exchange can not only ensure the long-term operation of the heat exchange systems, but also improve the heat exchange efficiency of different heat exchange systems in different heating systems. The control method for the dual-energy water heating apparatus in the present invention can automatically control the dual-energy water heating apparatus to operate in an optimal heating mode in response to different user requirements and external environmental conditions.

The utility model discloses an air guide mechanism and a gas heater, and belongs to the technical field of gas heaters, an outer cylinder of the air guide mechanism is mounted on an air outlet cylinder of the gas heater, and then an angle of a mounting rack relative to the outer cylinder is changed by rotating the mounting rack; the multiple air deflectors guide the hot air blowing direction of the air outlet of the air outlet barrel so as to change the air outlet direction of the gas heater, the gas heater does not need to be moved, and the air outlet direction of the gas heater can be adjusted more conveniently.

The utility model relates to the technical field of heating devices, and discloses a gas heating water heater dustproof device which comprises a main body assembly, a height installation adjusting assembly is installed on the rear side of the main body assembly, and a dustproof assembly is installed on one side of the main body assembly. The dustproof assembly is installed on the device, so that when the device is used, the working effect of air filtration can be provided through the dustproof assembly during air inlet, and a simple and convenient installation mode is provided during installation and subsequent replacement; in this way, convenience is provided during use.

The application provides an aviation high-temperature hydrogen fuel cell energy recycling system, and relates to the technical field of energy recycling, which is used for recycling the energy of fuel cell reaction waste gas / waste liquid, so as to effectively improve the energy utilization efficiency of the high-temperature fuel cell. The system comprises a reaction waste gas power generation module, a reaction gas heating and pressurizing module and a high-temperature hydrogen fuel cell. The high-temperature hydrogen fuel cell is connected with the reaction waste gas power generation module and the reaction gas heating and pressurizing module respectively. The reaction gas heating and pressurizing module is used for providing air and hydrogen for the high-temperature hydrogen fuel cell. The high-temperature hydrogen fuel cell generates reaction waste gas based on the operation of the air and hydrogen provided by the reaction gas heating and pressurizing module. The reaction waste gas power generation module is used for recycling the high-temperature and high-pressure waste gas generated by the high-temperature hydrogen fuel cell, generating electric energy based on the high-temperature and high-pressure waste gas, and supplying power for the reaction gas heating and pressurizing module.

The utility model relates to a controller installation structure of a condensation type fuel gas heating water heater, which comprises a structural plate and a controller which are arranged in a heater body, the bottom of the structural plate is connected with a bottom plate of the heater body through a hinge, so that the structural plate can turn over relative to the bottom plate, the controller is installed on the back face of the structural plate, and a control panel is arranged on the front face of the structural plate. The control panel is electrically connected with the controller, and the position, corresponding to the control panel, of a panel on the front side of the oven body is an operation area. The structural plate is connected with the bottom plate of the furnace body in a pivoted mode, when the controller needs to be overhauled, only the front plate needs to be detached, the structural plate is rotated forwards, the structural plate is horizontally placed, and then the controller can be exposed, so that a maintainer can directly overhaul the controller under the condition that the controller and the structural plate are not detached.

The comfort of the occupants is improved by maintaining a stable hot gas heating mode and suppressing fluctuations in the outlet temperature during the transition from hot gas heating mode to heat absorption heating mode. The vehicle air conditioning device comprises a refrigerant circuit, an air conditioning unit, and a control device that regulates the refrigerant circuit and the air conditioning unit. It can operate in a heat absorption heating mode, in which the heat from the refrigerant compressed by the compressor is released in the interior heat exchanger section and then absorbed in the external heat exchanger section, and in a hot gas heating mode, in which a portion of the refrigerant compressed by the compressor is routed through the hot gas bypass and returned to the compressor, while the heat from the remainder is released in the interior heat exchanger section. The control device regulates the operation accordingly.that during the transition from hot gas heating mode to heat absorption heating mode, the air damper is driven so that the current heating power in hot gas heating mode is reduced if the difference between the current heating power in hot gas heating mode and the heating power in heat absorption heating mode, which is estimated based on the temperature of the heat-absorbing object by the external heat exchanger, is equal to or greater than a predetermined value.