46results about How to "Small water capacity" patented technology

The invention discloses a barrel type filtering assembly. The assembly comprises an outer barrel, an inner barrel and multilayer barrel-shaped filter layers, wherein the multilayer barrel-shaped filter layers are arranged between the outer barrel and the inner barrel; the upper end and the lower end of the outer barrel are provided with sealing components which are connected with the outer barrel, the inner barrel and the upper ends and the lower ends of all the filter layers in a sealing way; thick water layers with annular spaces are arranged between the outer barrel and the adjacent filter layer, between the adjacent filter layers, and between the inter barrel and the adjacent filter layer; a filtrate flow channel is formed inside each filter layer; the heads and the tails of all the thick water layers and the inner barrel are communicated from the outer side to the inner side sequentially; the outer barrel is provided with a thick water inlet; and the inner barrel is provided with a thick water outlet. The barrel type filtering assembly is provided with the multilayer filter layers; and compared with other filtering assemblies with the same volume, the barrel type filtering assembly has the advantages of large filtering area, variational flowing directions of the thick water among all the layers, good filtering effect, wide application range, and convenient disassembly.

The invention is to protect the coolant extrinsic cycle system of the engine bench test. The engine water-yielding is educed the cooling liquid pipe which returns to the engine infall after passing a heat exchanger to form a closed circle. The cool end pipe of the heat exchanger is installed with the valve which is closed. The temperature sensor is set in the engine water-yielding and the signal line is connected to the controlling unit which the controlling line is connected with the valve and the alarming device. The controlling unit is set with two temperature value, one is the highest cooling liquid temperature endured by the engine and the other is the proper cooling liquid temperature of the engine. The invention can shorten the warming time of the engine and improve the quality and reliability of the engine bench test.

The invention discloses a vibrating washing device. The vibrating washing device comprises a water channel tank. A forward and reverse vibrating net roller, a spraying net roller and a spraying device are installed in the water channel tank. The forward and reverse vibrating net roller is wrapped by a heating bottom pipe. The vibrating washing device is simple in structure, reasonable in design and environmentally friendly, the washing effect is effectively improved, and energy is saved.

Disclosed is a pulse-water-supply external heating type solar engine. A heating chamber is mounted on the center of a revolution paraboloid condenser, and a small-concave-surface reflective mirror capable of reflecting and focusing incident light to the heating chamber again is mounted at the focal position of the revolution paraboloid; and the heating chamber is connected with a power machine through a high-pressure hose, and a plunger water pump for supplying water to the heating chamber in a pulse manner is connected with the heating chamber. The solar engine is easy to manufacture, long in service life, low in cost, high in heat efficiency, clean, environmentally friendly, and easy to apply and popularize.

The invention relates to a shoe bathtub, which comprises a bathtub body. The longitudinal section of the bathtub body is L-shaped. An L-shaped bottom is that a closed transverse space is formed at an L-shaped horizontal stroked position. An L-shaped vertical cylindrical wall is that an opened vertical space is formed at an L-shaped vertical stroked position. The transverse space is formed by encircling the wall of the bathtub. The shoe bathtub disclosed by the invention has the benefits that: compared with the groove bathtub, because the water capacity of the shoe bathtub is very low, and a lot of clear water is unnecessary, the shoe bathtub is advantageous for saving water; because the opening of the bathtub is not very large, and other parts are fully closed, a lot of heat cannot be dissipated, and the shoe bathtub is easy to keep warm; and, because bath people can be completely immersed and can feel comfortable and warm, the shoe bathtub is beneficial to physical and psychological health.

A special-shaped inner tube all-glass vacuum solar-energy collecting tube is characterized in that: the wall of inner tube (2) is a polyhedral cylinder axially extending along the inner tube (2); the inner and outer faces of the wall of inner tube (2) are relative to the cylinder; the radial section of inner tube (2) is relative to the polyhedral cylinder of the wall of inner tube (2); the face of polyhedral cylinder is plane, or the convex arc or the concave arc. The invention has the advantages in the replace function on the general full-glass vacuum solar-energy collecting tube, to improve the inner and outer faces of inner tube (2), to improve heat adsorption, reduce the water volume of inner tube, improve the heat efficiency and improve the strength, while it can resist the inner water pressure, the axial bend and the explosion. The invention has simple production and low cost.

The invention discloses a steam generator, and relates to the field of steam equipment. The technical problems that in the prior art, a drum type boiler is started slowly when producing steam, is large in heat waste and has explosion risks are solved. The steam generator comprises a coil pipe, a combustor, a steam separator and a feed water source, wherein the coil pipe is connected between the steam separator and the feed water source, a combustion chamber is formed in the combustor, the coil pipe is arranged in the combustion chamber, and a smoke inlet pipe is arranged on the combustion chamber and extends into the coil pipe. The air-fuel ratio can be accurately controlled through the combustor, and after radiation heat transfer, smoke gas flows through the outer side of the coil pipe in the combustion chamber to exchange heat with fluid in the coil pipe; in comparison with boiler heating, the coil pipe is small in size and water capacity and free of the explosion risks, the coefficient of heat transfer of the coil pipe is high, heating loads per unit are large, steam generating speed is high, smoke exhaust temperature is low, and the use ratio of energy is high.

An all-glass vacuum heat collection pipe with a regular prism-shaped inner pipe and a production method thereof belongs to the field of solar energy utilization devices and solves the problem that thefull body type special-shaped inner pipe is difficult to process and produce. The all-glass vacuum heat collection pipe comprises a basic structure of the conventional all-glass vacuum heat collection pipe, wherein, the inner pipe (2) consists of a left section (7), a middle section (8) and a right section (9) which are mutually coaxially connected to a whole, the middle section (8) comprises a regular prism-shaped structure, and the left section (7) and the right section (9) are shaped like circular pipes. The production method comprises the steps of using a special discharge mold for drawing the axial full body type regular prism-shaped blank inner pipe, then carrying out reaming and circle-expanding on two ends for forming the left section (7) and the right section (9), fixing the size, discharging, trimming edges, firing mouths, carrying out round burning and sealing on the right section (9), plating a film, splicing with an outer pipe according to the conventional method and thelike, and the production must carry out annealing treatment in time. The all-glass vacuum heat collection pipe has the advantages that the all-glass vacuum heat collection pipe maximizes the surface area of a heat absorbing body and the heat exchange area energy of a heat transfer medium, minimizes the capacity energy of the inner pipe and realizes high strength; the all-glass vacuum heat collection pipe is based on the convention equipment and technology, thereby having low investment, low cost and high finished product ratio; and the all-glass vacuum heat collection pipe is suitable for massproduction.

The invention discloses a direct current steam generator and relates to the field of steam generators. The direct current steam generator solves the problems that the operating cost is relatively highas a conventional drum boiler is relatively long in starting time and relatively poor in heat efficiency, and a conventional boiler which is relatively large in water volume has the probability of steam explosion and is relatively low in reliability. The lower part of a shell is cylindrical, a burner is arranged at one end of the lower part of the shell, the burner communicates to the lower partof the shell, n high-temperature area radiating heated pipes are arranged in the lower part of the shell, n is a positive integer and the high-temperature area radiating heated pipes are parallelly arranged, m water cooling walls are uniformly arranged on the inner wall of the lower part of the shell along the circumferential direction, m is a positive integer, an upper part of the shell is arranged on the outer surface of the other end of the lower part of the shell circumferentially, the upper part of the shell communicates to the lower part of the shell, and a low-temperature area convection heated unit is vertically arranged in the upper part of the shell. The direct current steam generator is suitable for the fields of chemical engineering, casting, movable heating, pharmacy and disinfection and can be also applied to a steam-injection mining steam-injection boiler of an oil field and a starting furnace of a power station.

The invention discloses a premixed closed module gas-fired boiler. The premixed closed module gas-fired boiler comprises an airtight combustion chamber composed of an upper plate, a face plate, a rear plate and a side plate, and a unit base used for fixing the airtight combustion chamber; a water inlet and a water outlet arranged on the face plate are connected into a water inlet and a water outlet of a front divergence water tank through a water inlet pipeline and a water outlet pipeline respectively, wherein the water inlet of the face plate is also connected with a built-in circulating pump through the water inlet pipeline; a rear divergence water tank is installed on the surface opposite to the front divergence water tank, and the front divergence water tank is communicated with the rear divergence water tank through a metal fin tube heat exchanger; a fuel gas connector on the face plate is communicated with a fuel gas header pipe; a fuel gas main valve is installed on the fuel gas header pipe; a plurality of branch pipes are connected into the part, behind the valve, of the fuel gas header pipe in parallel; the tail ends of the branch pipes are connected with a group of calandria combustors which are connected in parallel. According to the premixed closed module gas-fired boiler, an ignition system of the boiler is improved, so that a combustor, a heat exchange system and other internal devices of an existing gas-fired boiler are integrated and optimized; an intelligent control system is matched with the boiler for use, so that internal friction of the boiler is reduced, the automation degree of the boiler is increased, and thermal efficiency of the boiler is improved.

The invention relates to a steam generation device, in particular to a heat pipe type steam generator. The heat pipe type steam generator comprises a boiler, a generator body and a combustor. The combustion end of the combustor stretches into a hearth of the boiler. The boiler is connected with the generator body. A heat pipe is arranged in the generator body. A primary side channel is formed outside the heat pipe. A secondary side channel is formed in the heat pipe. Media in the primary side channel exchange heat with media in the secondary side channel. The boiler is connected with the primary side channel of the generator body so that a primary side cycle loop can be formed, and the primary side cycle loop is vacuum and is closed. The height of the lowest liquid level of the primary side channel is larger than the height of the highest liquid level of the boiler. By utilization of the height difference between the liquid level in the primary side channel and the liquid level of theboiler, it is guaranteed that in the primary side cycle loop, the water solution in the generator body can still return into the boiler under the situation that no water pump supplies power, accordingly, outside oxidized gas is prevented from being sucked into the primary side water cycle loop, and the service life of the boiler is prolonged.

Disclosed is a multi-floating-body floating platform with a dock. The dock is arranged in a single and / or part of floating body structures of multiple floating bodies of the floating platform, and thelower deck of the dock is located below the light load line of the multi-floating-body floating platform. Small boats or other facilities such as pontoons can be carried, released and recovered in the dock. The dock is provided with a gravity water injection device and a power drainage device, so that the water injection and drainage operation of the dock is convenient and reliable, and the abovesmall boats or other facilities can conveniently enter or leave the dock without needing to perform overall ballast operation on the floating platform.

The invention provides a solar energy cooker system. A water feeding and steam pipeline is connected between a header and a steam separator. The lower portion in a cooking barrel, the lower portion in a cooking cabinet and the lower portion in a steaming cabinet are provided with electric heating pipes. One end of a fourth pipeline is communicated with a hot water tank, and the other end of the fourth pipeline is communicated with the steam separator and a solar energy collector. A cooker can be directly placed on the ground, a step and a support are omitted, and operation of kitchen staff is greatly facilitated. After a distilled water generator is modified, pollution is avoided, the maintenance frequency is extremely low, and water quality is better. The electric heating pipes are arranged at the bottom of a water returning pipeline, the bottom of the cooking cabinet, the bottom of the cooking barrel and the bottom of the steaming cabinet, the temperature of water in the system can be fast raised, and when it becomes cloudy suddenly in the cooking process, food can be cooked forcefully. Before water in the pipelines is not frozen, a valve is opened, so that water in the pipelines flows into a water tank, the water in the water tank is injected into the system again in the morning of the next day through a water pump, and therefore blocking, caused by freezing, of a circulation pipeline is avoided.

The invention relates to a through-flow type boiler. The through-flow type boiler comprises a water supply pump, a check valve, an energy saving device, an energy saving device drain valve, a boiler main engine, an air blower, a combustion engine, a main steam valve, a safety valve, a water level electric shock bar, a water level meter, a boiler drain valve, an automatic drain electromagnetic valve, an electric cabinet and a boiler base. The through-flow type boiler is compact in structure, small in size, low in weight and convenient to move, and has the characteristics of being high in heat efficiency and automation degree, safe and reliable, convenient to operate and the like, and the market application general reaction is good. The fuel of the boiler is clean oil or natural gas.

The invention provides a boiled water heater. The boiled water heater comprises a water inlet 1, silicon rubber rings 2, a positioning plate 3, a stainless steel tube 4, connecting rods 5, temperature control installation blocks 6, a water outlet 7, a water outlet cover 8, seal rings 9, an electric heating tube 10, a temperature sensor 11 and a dry boiling preventing temperature controller 12, wherein the water inlet 1 and the water outlet 7 are connected by three connecting rods 5; the electric heating tube 10 has a double U shaped structure; the spread length of a heat emitting part of the electric heating tube is more than three times the length of the stainless steel tube 4; and the inner diameter of the stainless steel tube 4 is not more than 24mm. The boiled water heater has a complete structure, low electric heating tube surface load and small water volume, can achieve quicker boiled water outflow, is simple in assembly process, is safe and reliable, has stable properties and long service life and is an ideal instantaneous boiled water heater.

The invention discloses a vertical full premix gas steam or hot water boiler. The boiler comprises a full premix combustor (1) transversely penetrating a vertical boiler shell (10) in a connected manner, the full premix combustor (1) comprises a racket-shaped front segment handle hearth (2) and a racket-shaped rear segment racket face hearth (3), the racket-shaped front segment handle hearth (2) is located on the outer side of the vertical boiler shell (10), the racket-shaped rear segment racket face hearth (3) is located in the vertical boiler shell (10), the top of a vertical two-return-stroke straight smoke tube (4) is communicated with the racket-shaped rear segment racket face hearth (3), and the bottom of the two-return-stroke straight smoke tube (4) is communicated with a bottom smoke box (5). The vertical full premix gas steam or hot water boiler is compact in structure and high in heat efficiency.

The invention discloses a three-cavity vacuum tube, which comprises a full-glass vacuum tube and a glass core tube, and the glass core tube is mounted in the full-glass vacuum tube. The three-cavity vacuum tube is characterized in that: the water capacity in the vacuum tube is reduced, consequently, the heat capacity is reduced, the speed of heat exchange is increased, and the heat loss caused by the water stored in the tube is reduced as well.

The present invention relates to an electrothermal water heating machine, and is characterized in that the device comprises a casing and a radiator arranged inside the casing. The radiator comprises an upper water chamber, a lower water chamber, and a radiating pipe connected and communicated with the upper water chamber and the lower water chamber. The outer wall of the radiating pipe is provided with a radiating fin. The top of the upper water chamber is provided with a water feeding opening. An electric heating body is arranged inside a cavity of the lower water chamber. The top of the casing is provided with an observation window corresponding to the water feeding opening. A front panel of the casing is provided with a radiating opening, and a rear panel is provided with a radiating fan. The present invention has the advantages of small size, small occupying space, easy handling, small size of water containing, and fast heating and electricity-saving by electric heating, mandatory radiation of the radiating fan, high utilization rate of the heat energy, saved energy, and can provide the warming by time-section and room according to the needs, thus saving the energy and reducing the expenditure.

The invention discloses an anti-freezing faucet which comprises a body with a water source switch, cover bodies are arranged on the two sides of the body, and the anti-freezing faucet is characterized in that a water pressure power source touch switch is installed in the body, and an anti-freezing cushion body is arranged below the water pressure power source touch switch. A gasket is arranged between the body and one cover body, and an exhaust vent is formed in each cover body. A spring and an ejector block are arranged between one cover body and the gasket. The anti-freezing faucet is good in anti-freezing effect and good in safety coefficient.

The invention discloses a high-power concentrating photovoltaic thermal control device. The high-power concentrating photovoltaic thermal control device comprises a radiator and a water tank, whereina circulating pipeline arranged on the radiator is arranged inside the water tank, and heat exchange is carried out between a heat-carrying working medium in the circulating pipeline and water in thewater tank; the high-power concentrating photovoltaic thermal control device is characterized in that the radiator further comprises a heat absorption surface and a heat dissipation part, wherein theheat dissipation part is arranged on one side of the heat absorption surface, and a medium inlet and a medium outlet are formed in the heat dissipation part; the circulating pipeline is connected to the medium inlet and the medium outlet; and fins are arranged in the radiator and gaps formed by the adjacent fins are equal. The technical scheme provided by the invention is used for temperature control of a concentrating photovoltaic power generation battery; the high-power concentrating photovoltaic thermal control device is reasonable in structure, and the heat-carrying working medium is usedfor taking away heat from the heat absorbing surface so as to achieve the purpose of temperature control, so that the service life of the battery is guaranteed, and the reliability and the efficiencyof concentrating photovoltaic power generation are improved; and in addition, the heat taken away by the heat-carrying working medium is stored in water in the water tank, so that waste is reduced, and the utilization rate of energy is improved.

The invention provides a fan plate type corrugated heat exchanger comprising at least one corrugated air ventilating plate and at least one corrugated water passing plate, which are arranged with one another at intervals, wherein the adjoining corrugated air ventilating plates and corrugated water passing plates are separated from one another by an isolation plate, and all the corrugated air ventilating plates, isolation plates and corrugated water passing plates are fixed between two fixed plates; sealed structures are respectively formed among the corrugated air ventilating plates, the corrugated water passing plates, the adjoining isolation plates or the fixed plates, so that air ways which are sealed at four sides and only allow the air to vertically pass in and out and water ways which are wholly sealed and only allow the water to pass in and out can be formed, and the air ways and the water ways are arranged with one another at intervals; and the fixed plates, the corrugated air ventilating plates, the isolation plates and one sides which correspond to seal structures among the plates are respectively provided with a convex water inlet and a convex water outlet, and each water inlet hole and each water outlet hole are communicated with one another, so that a water inlet passageway and a water outlet passageway are formed. An air inlet room of the heat exchanger further comprises at least one fan, so that the air inlet speed can be accelerated. The heat exchanger is small in design space, high in heat exchange efficiency, and quick in cooling speed, thereby being an ideal energy-saving product.

The invention relates to a steam generation moisturizing device. The steam generation moisturizing device comprises a mounting bracket; the mounting bracket is at the lower end of a machine cover, andis connected with the machine cover; a combustion chamber is formed in the lower side in the machine cover; a combustion inlet is below the combustion chamber; refractory insulation materials are mounted around the combustion chamber; an air inlet is formed in the side of the combustion chamber, and is connected with the combustion chamber by using a flange mode; a chimney is mounted rightly above the machine cover; and a heating coil is mounted above the combustion chamber. The heating coil is in a form of a spiral flat multilayer cake, so that the heating efficiency is high, conservation and environmental protection are achieved, and the heating speed is high.

The invention relates to a shoe-shaped bathtub, which has an L-shaped longitudinal section, a closed transverse space formed at the bottom of the L-shaped bathtub, i.e. the cross line of L, and an open vertical space formed at the vertical wall of the L-shaped bathtub, i.e. the vertical line of L, wherein the transverse space protrudes out of the vertical space at the bottom of the bathtub and are surrounded by the bathtub walls. The longitudinal section of the bathtub is designed to the L shape, so that the internal space of the bathtub has an L shape, like a shoe. While bathing, the user can enter and exit the bathtub through the vertical entrance of the bath, the user's legs can be partially expanded at the closed bottom of the bathtub, and the body leans against the vertical wall of the bathtub. Compared with tank-type bathtub, the shoe-shaped bathtub has smaller water capacity to facilitate saving water, smaller bathtub entrance and full-closed other portion to prevent heat dissipation and preserve heat. The user can be soaked completely and can take a comfortable and pleasant bath, which is beneficial to physical and psychological health.

The invention discloses a condenser structure for receiving wine at a high temperature. The condenser structure comprises a cooling water bucket and a condenser, wherein the condenser is arranged in the cooling water bucket; the cooling water bucket is composed of a bucket body, a bucket cover and an inner cavity of the bucket body; the inner cavity of the bucket body is formed at the inner side of the bucket body; the bucket cover is arranged at the top of the bucket body; condensate water discharge pipes of the bucket body are evenly arranged on the bucket body; condensate water discharge pipes of the bucket cover, which are communicated with the condensate water discharge pipes of the bucket body, are arranged on the bucket cover; a condenser comprises a condenser bottom plate, a condenser top plate and a heat exchange tube; the heat exchange tube is arranged between the condenser bottom plate and the condenser top plate; a cavity for accommodating an inner cavity of the bucket body is formed in the heat exchange tube along the condenser bottom plate and the condenser top plate; an air guide pipe is arranged in the middle of the condenser top plate; an isolation plate is arranged at the bottom of the condenser top plate; and the cooling water bucket is divided into an upper layer and a lower layer by the isolation plate. According to the condenser structure, the cooling water is saved; the temperature rise during water cooling is fast; the temperature change is sensitive and easy to control; and the discharged wine temperature required by the technology can be timely ensured.

The invention relates to a solar vacuum collector siphon cycle guider, which comprises a sealed guider, an upper support positioning device, a lower support positioning device, and a flow guider. It fills the tube chamber of solar vacuum heat collecting tube to form the solar energy water heater bank, the thermal-insulated falling water tube, the bottom coupled chamber, the heating ascending water tube and the water bank which form the closed cycle system. Wherein, the flow guider can guide the cold and hot water in or out of the tube, the coupled bank and the closed flow guider, to separate the descending cold water and ascending hot water; said closed flow guider is inside the heat collecting tube; and said invention at least comprises the upper and lower support positioning device, to support and position the closed flow guider inside the heat collecting tube.

The invention relates to a washbasin-closestool composite water-saving device, comprising a washbasin, a water storage tank and a closestool, wherein the washbasin is provided with a water outlet; the water storage tank is provided with a water inlet pipe and a water outlet pipe, and the water inlet pipe is communicated with the water outlet of the washbasin; the closestool is provided with a dirty water flushing tank and a dirty water control valve used for controlling the dirty water flushing tank, and the dirty water flushing tank is communicated with the water outlet pipe of the water storage tank. The invention is characterized in that a clear water flushing tank is arranged above the dirty water flushing tank, a flush pipe of the clear water flushing tank is connected to the interior of the closestool and is controlled to open or close by a clear water control valve. Compared with the prior art, the invention has the advantages that the dirty water flushing tank is lowly positioned and is used frequently, thereby saving water resources; and the clear water flushing tank is the auxiliary supplement for the dirty water flushing tank and is highly positioned, and the drop height is large, thereby contributing to flushing and lowering the requirement on water capacity; and therefore, the capacities of the dirty water flushing tank and the clear water flushing tank are reduced, thereby effectively reducing the manufacturing cost and the installation space.

The invention relates to a novel natural gas steam generating device which comprises a mounting bracket, a hood, a heating coil pipe, a combustion chamber, a fireproof insulating material, a chimney,an air inlet and a combustion inlet. The mounting bracket is arranged at the lower end of the hood and is connected with the hood. The lower portion in the hood is the combustion chamber. The combustion inlet is arranged below the combustion chamber. The periphery of the combustion chamber is provided with fireproof insulating material. The air inlet is arranged at the side part of the combustionchamber and is connected with the combustion chamber in a flange manner. The chimney is arranged right above the hood. The heating coil pipe is mounted above the combustion chamber. The heating coil pipe has a spiral flat multilayer spiral cake shape. The novel natural gas steam generating device has advantages of high heating efficiency, energy saving effect, environment-friendly performance andhigh heating speed.

The invention provides a biomass and fuel gas dual-purpose fast-heating vertical water heating boiler. The water heating boiler comprises a cylindrical combustion furnace, a heat exchange system arranged above the combustion furnace, a feeder arranged on the side surface of the combustion furnace, a fuel gas pipe and an air blower, wherein the heat exchange system internally comprises a smoke boxand a smoke pipe, the smoke box communicates with the combustion furnace, the smoke pipe is vertically arranged above the smoke box, the feeder, the fuel gas pipe and the air blower are arranged on the same side surface of the combustion furnace from top to bottom, and the combustion furnace, the heat exchange system, the feeder, the fuel gas pipe and the air blower are sealed in a cuboid-shaped metal shell. The water heating boiler can take biomass particles or fuel gas as fuel, and has the advantages of being sufficient in combustion, high in heat efficiency, compact in structure, energy-saving and environment-friendly.

The invention discloses a premixed closed module gas-fired boiler. The premixed closed module gas-fired boiler comprises an airtight combustion chamber composed of an upper plate, a face plate, a rear plate and a side plate, and a unit base used for fixing the airtight combustion chamber; a water inlet and a water outlet arranged on the face plate are connected into a water inlet and a water outlet of a front divergence water tank through a water inlet pipeline and a water outlet pipeline respectively, wherein the water inlet of the face plate is also connected with a built-in circulating pump through the water inlet pipeline; a rear divergence water tank is installed on the surface opposite to the front divergence water tank, and the front divergence water tank is communicated with the rear divergence water tank through a metal fin tube heat exchanger; a fuel gas connector on the face plate is communicated with a fuel gas header pipe; a fuel gas main valve is installed on the fuel gas header pipe; a plurality of branch pipes are connected into the part, behind the valve, of the fuel gas header pipe in parallel; the tail ends of the branch pipes are connected with a group of calandria combustors which are connected in parallel. According to the premixed closed module gas-fired boiler, an ignition system of the boiler is improved, so that a combustor, a heat exchange system and other internal devices of an existing gas-fired boiler are integrated and optimized; an intelligent control system is matched with the boiler for use, so that internal friction of the boiler is reduced, the automation degree of the boiler is increased, and thermal efficiency of the boiler is improved.