CN210197678U - Novel household microwave plasma wall-mounted furnace - Google Patents

Novel household microwave plasma wall-mounted furnace Download PDF

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Publication number
CN210197678U
CN210197678U CN201920499905.6U CN201920499905U CN210197678U CN 210197678 U CN210197678 U CN 210197678U CN 201920499905 U CN201920499905 U CN 201920499905U CN 210197678 U CN210197678 U CN 210197678U
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China
Prior art keywords
microwave plasma
microwave
discharge tube
air
novel
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Expired - Fee Related
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CN201920499905.6U
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Chinese (zh)
Inventor
Shiyang Huang
黄诗洋
Cheng Liu
刘程
Guixin Zhang
张贵新
Lei Deng
邓磊
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Tsinghua University
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Tsinghua University
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Abstract

The utility model discloses a novel microwave plasma household wall-mounted furnace, which comprises a combustion chamber, a main heat exchanger arranged in the combustion chamber, a torch generator, a microwave plasma generator power supply and an air supply module, wherein the torch generator is arranged in the combustion chamber and comprises a microwave resonance cavity, a microwave generator arranged at the lower side of the microwave resonance cavity and a discharge tube arranged in the microwave resonance cavity, and an ignition conductor is embedded in the discharge tube; the upper end of the discharge tube is provided with a fire outlet, the lower end of the discharge tube is provided with an air inlet, and the air supply module is connected to the air inlet; and the power supply of the microwave plasma generating device is electrically connected with the torch generator. The utility model discloses a novel domestic hanging stove of microwave plasma can produce the flame of high temperature (about 2000 ℃), and it is more convenient to use, and the limitation is littleer.

Description

Novel household microwave plasma wall-mounted furnace
Technical Field
The utility model relates to a domestic heating equipment field, in particular to novel domestic hanging stove of microwave plasma.
Background
Domestic wall-mounted furnaces are a common heat source in heating systems and sanitary systems. At present, a household wall-mounted furnace is heated by using fuel gas, but the highest temperature of flame of the fuel gas is generally hundreds of degrees centigrade, the heating speed is not fast enough, most of heat is rapidly dissipated through air, the fuel is really and effectively heated, and the utilized energy does not exceed 40%, so that energy waste is caused.
Moreover, the gas has serious potential safety hazards of flammability, easy explosion, easy leakage and the like, and the burning of fossil fuel can also discharge a large amount of greenhouse gas, and when the burning is insufficient, a large amount of carbon monoxide can be discharged, so that the danger of poisoning of people in a closed environment exists. These factors result in a limited environment for home wall-hanging stoves.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel domestic hanging stove of microwave plasma, it can produce the flame of high temperature (about 2000 ℃) rapidly, and it is more convenient to use, and the limitation is littleer.
The above object of the present invention can be achieved by the following technical solutions:
a novel microwave plasma household wall-mounted furnace comprises a combustion chamber, a main heat exchanger arranged in the combustion chamber, a torch generator, a power supply of a microwave plasma generating device and an air supply module, wherein the torch generator is arranged in the combustion chamber and comprises a microwave resonance cavity, a microwave generator arranged on the lower side of the microwave resonance cavity and a discharge tube arranged in the microwave resonance cavity, and an ignition conductor is embedded in the discharge tube; the upper end of the discharge tube is provided with a fire outlet, the lower end of the discharge tube is provided with an air inlet, and the air supply module is connected to the air inlet; and the power supply of the microwave plasma generating device is electrically connected with the torch generator.
By adopting the technical scheme, the microwave generator generates microwaves, the microwaves pass through the microwave resonance cavity, so that the space electromagnetic field is enhanced, and strong gas ionization is initiated at the position of the discharge tube to generate plasma and form electronic flame; the household wall-mounted microwave plasma stove only needs 1kW-3kW of discharge power, can quickly generate high-temperature (about 2000 ℃) flames, greatly reduces power consumption, avoids gas pollution at a user terminal, is higher in safety, and has a wider application range.
The utility model discloses further set up to: the air supply module comprises an air inlet pipe, an air guide pipe and an air pump, wherein the air inlet pipe is communicated with the discharge pipe, the air guide pipe is communicated with the air pump, and working gas is introduced into the air guide pipe, one end of the air guide pipe penetrates through the side wall of the air inlet pipe and is communicated with the inner cavity of the air inlet pipe.
Through adopting above-mentioned technical scheme, when using, through air pump and air duct, can be to the air of blowing into in discharge tube to can maintain the flame stability in the discharge tube, simultaneously, can control the flame temperature according to the air blast size. The conductor is used for absorbing microwave energy and the gas inlet pipe generates instantaneous flashover, so that seed electrons are provided, and microwave plasma is easy to excite; after the microwave plasma is excited, the microwave energy is transferred into the plasma, the ignition conductor does not absorb the energy, and the flashover time is very short; after the microwave plasma is extinguished accidentally, the conductor absorbs the microwave energy and ignites again, so that the plasma can be re-ignited.
The utility model discloses further set up to: the outlet end of the air duct is flush with the inner wall of the air inlet pipe, and the included angle between the axial line of the pipe section at the joint of the air duct and the air inlet pipe and the axial line of the air inlet pipe is 10-80 degrees.
By adopting the technical scheme, after the working gas is blown, the working gas can more easily form vortex gas in the non-metal conducting pipe. Because the working gas enters the core area of the microwave plasma in a vortex mode, a certain distance is reserved between the microwave plasma and the inner wall of the nonmetal conductor, and meanwhile the working gas also plays a cooling role.
The utility model discloses further set up to: the discharge tube is a quartz microwave discharge tube.
By adopting the technical scheme, the discharge tube is made of the high-temperature-resistant material, so that the service life of the device can be prolonged.
The utility model discloses further set up to: the ignition conductor is annularly attached to the inner wall of the discharge tube.
By adopting the technical scheme, the ignition conductor is attached to the inner wall of the discharge tube, so that the partial discharge of the ignition conductor can be reduced, and the service life of the ignition conductor is prolonged.
The utility model discloses further set up to: the side wall of the ignition conductor extends towards one side of the axial lead of the discharge tube to form a discharge point.
By adopting the technical scheme, the tip can better and easily excite the microwave plasma.
The utility model discloses further set up to: the novel microwave plasma household wall-mounted furnace also comprises a plate-type heat exchanger, wherein the plate-type heat exchanger is provided with a hot water inlet end and a hot water outlet end, and the hot water inlet end is provided with an electric three-way valve and is connected with the water outlet end of the main heat exchanger through the electric three-way valve; the hot water outlet end is provided with a four-way joint, the four-way joint is connected with a water pump, and the output end of the water pump is communicated with the water inlet end of the main heat exchanger.
Through adopting above-mentioned technical scheme, the water pump is used for providing the power of the water flow circulation in the system, and when there is the heating demand, the water pump heats the terminal water pump of heating and heats into the main heat exchanger of hanging stove, and the hot water after the heating flows out to the terminal heat transfer of heating through electric three-way valve.
The utility model discloses further set up to: the four-way is also connected with an expansion tank.
Through adopting above-mentioned technical scheme, the expansion tank is used for avoiding the pressure fluctuation, because the water among the heating system is sealed circulating water, has expend with heat and contract with cold when operation heating or shut down the water system, carries out stable system pressure through the expansion tank, avoids water pressure fluctuation.
The utility model discloses further set up to: the top cover of combustion chamber is equipped with the collection petticoat pipe, install the fan on the collection petticoat pipe, the air outlet and the outside intercommunication of fan.
Through adopting above-mentioned technical scheme, directly take out the flue gas after will burning through the fan.
To sum up, the utility model discloses following beneficial effect has:
1. the torch generator has higher electrothermal conversion efficiency, and can heat the main heat exchanger only by providing electric energy, thereby avoiding gas pollution at a user terminal, having stronger safety and wider application range of the household wall-mounted furnace;
2. the conductor is used for absorbing microwave energy and the gas inlet pipe generates instantaneous flashover, so that seed electrons are provided, and microwave plasma is easy to excite; after the microwave plasma is excited, the microwave energy is transferred into the plasma, the ignition conductor does not absorb the energy, and the flashover time is very short; after the microwave plasma is extinguished accidentally, the conductor absorbs the microwave energy and ignites again, so that the plasma can be re-ignited.
Drawings
Fig. 1 is a schematic structural diagram of the embodiment.
In the figure, 1, a combustion chamber; 2. a smoke collecting hood; 21. a fan; 22. a smoke exhaust pipe; 3. a primary heat exchanger; 4. a plate heat exchanger; 41. a hot water inlet end; 42. a hot water outlet end; 43. a water inlet end is filled with water; 44. discharging water from the water outlet end; 5. an expansion tank; 6. a water pump; 7. a torch generator; 71. a microwave resonant cavity; 711. a contraction section; 72. a microwave generator; 73. a discharge tube; 74. an ignition conductor; 741. a discharge tip; 8. a power supply for the microwave plasma generating device; 9. an air supply module; 91. an air pump; 92. an air duct; 93. an air inlet pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): the utility model provides a novel domestic hanging stove of microwave plasma, as shown in figure 1, establish collection petticoat pipe 2 at combustion chamber 1 top including combustion chamber 1 and cover, seted up the exhaust port on the collection petticoat pipe 2, install fan 21 on the collection petticoat pipe 2, the air intake and the exhaust port intercommunication of fan 21, the pipe 22 of discharging fume is installed to the air outlet of fan 21, the output and the outside intercommunication of the pipe 22 of discharging fume, directly take out the flue gas after will burning the completion through fan 21.
The novel household microwave plasma wall-mounted furnace further comprises a main heat exchanger 3 and a plate-type heat exchanger 4, wherein the main heat exchanger 3 is installed in the combustion chamber 1 and is located under the smoke collecting hood 2. The plate heat exchanger 4 is located outside the combustion chamber 1, the plate heat exchanger 4 is provided with a hot water inlet end 41, a hot water outlet end 42, a water inlet end 43 and a water outlet end 44, wherein the hot water inlet end 41 is provided with an electric three-way valve, a first end of the electric three-way valve is connected with the water outlet end of the main heat exchanger 3, a second end of the electric three-way valve is connected with the hot water inlet end 41 of the plate heat exchanger 4, and a third end of the electric three-way valve is connected with a.
A four-way joint is arranged at a hot water outlet end 42 of the plate type heat exchanger 4, a first end of the four-way joint is connected with the hot water outlet end 42, a second end of the four-way joint is communicated with an expansion tank 5, a third end of the four-way joint is connected with a water inlet end of a water pump 6, and a fourth end of the four-way joint is connected with a heating hot water return pipe. The expansion tank 5 is used for avoiding pressure fluctuation, and because the water in the heating system is the sealed circulating water, when the heating system is operated and heated or the machine is shut down, the water system has expansion with heat and contraction with cold, and the system pressure is stabilized through the expansion tank 5, so that the water pressure fluctuation is avoided.
The water outlet end of the water pump 6 is connected with the water inlet end of the main heat exchanger 3, the water pump 6 is used for providing power for water flow circulation in the system, if a heating demand exists, the water pump 6 pumps water at the tail end of the heating into the main heat exchanger 3 of the wall-mounted furnace for heating, and the heated hot water flows out to the tail end of the heating through the electric three-way valve for heat exchange.
Domestic water is connected to the plate heat exchanger 4 through the water inlet end 43, and hot water heated by the plate heat exchanger 4 directly comes out from the water outlet end 44 for domestic bathing; when the domestic hot water is needed, the electric three-way valve is reversed, the hot water from the main heat exchanger 3 is communicated to the plate heat exchanger 4 to exchange heat with the tap water, and the heated tap water directly flows out for domestic bathing.
A torch generator 7 for heating the main heat exchanger 3 is arranged in the combustion chamber 1, and the torch generator 7 comprises a microwave resonance cavity 71, a microwave generator 72 arranged at the lower side of the microwave resonance cavity 71 and a discharge tube 73 arranged in the microwave resonance cavity 71; wherein, the microwave resonance cavity 71 is fixed at the lower side of the main heat exchanger 3, the microwave generator 72 is fixed at the horizontal side of the microwave resonance cavity 71, and a microwave electric field is provided to the microwave resonance cavity 71 through the microwave generator 72. The discharge tube 73 vertically penetrates through the microwave resonant cavity 71, and has a fire outlet at the upper end and an air inlet at the lower end. An ignition conductor 74 is mounted in the interior of the discharge tube 73 and the ignition conductor 74 is located in a section of the tube adjacent the microwave resonant cavity 71. A power supply 8 of the microwave plasma generating device is also arranged in the combustion chamber 1, the power supply 8 of the microwave plasma generating device is electrically connected with the torch generator 7, and a power line of the power supply 8 of the microwave plasma generating device is communicated with the novel microwave plasma household wall hanging stove.
When the novel microwave plasma household wall-mounted oven is heated, the microwave generator 72 is adjusted to generate an electromagnetic field in the microwave resonance cavity 71, so that the ignition conductor 74 inside generates ion flame. The microwaves propagate within the microwave resonant cavity 71 such that the spatial electromagnetic field is enhanced, causing strong ionization of the gas to generate a plasma. The microwave plasma has higher electrothermal conversion efficiency, particularly, the generation of high-temperature flame does not need fossil fuel, only needs to provide electric energy, avoids gas pollution at a user terminal, has stronger safety, and has wider application range of the household wall-mounted furnace.
The microwave resonant cavity 71 is thicker near the microwave generator 72 and thinner on the side far from the microwave generator 72 in the horizontal direction, and the position is a contraction section 711 of the microwave resonant cavity 71, in the contraction section 711, the microwave electric field amplitude in the microwave resonant cavity 71 is the largest, and in order to enable the discharge tube 73 to generate flame more smoothly, the discharge tube 73 is arranged in the contraction section 711.
In use, microwave plasma flames are released at the location of the discharge tube 73 as they pass through the microwave resonant cavity 71, causing an electromagnetic field to be enhanced in the space.
In order to make it easier for the ignition conductor 74 to excite the microwave plasma, the discharge tube 73 is disposed at a position (1/4 λ + k λ) where λ is the wavelength of the microwave in the system and k is an integer of 0 or more from the axial center line thereof to the end surface (1/4 λ + k λ) of the microwave resonance cavity 71, where the end surface of the microwave resonance cavity 71 mentioned above refers to the end of the microwave resonance cavity 71 horizontally away from the microwave generator 72. The microwave electric field amplitude at this position is the largest, and microwave plasma is excited more easily.
The ignition conductor 74 is made of a high temperature resistant material, and may be made of tungsten, iron, copper, or the like, and is provided in a ring shape, and the ignition conductor 74 is fitted into the discharge tube 73 when attached, wherein the side wall of the ignition conductor 74 may be formed in a spiral shape or a mesh shape, and by providing the ignition conductor 74 in a tubular shape, the ignition conductor 74 does not directly contact with plasma when used, thereby preventing the ignition conductor 74 from being ablated and improving the service life of the ignition conductor 74. In order to excite plasma more efficiently, a discharge tip 741 is formed on the ignition conductor 74 to extend toward the center, and the discharge tip 741 is made of a high-temperature-resistant conductive material.
It should be noted that, the discharge tube 73 is a quartz microwave discharge tube 73, and the discharge tube 73 has better heat resistance and longer service life.
An air supply module 9 is provided outside the combustion chamber 1, and when the torch generator 7 is operated, the air supply module 9 can supply air into the discharge tube 73 to stabilize the internal plasma flame. The air supply module 9 comprises an air inlet pipe 93 fixed on the microwave resonant cavity 71 and communicated with the discharge tube 73, an air pump 91 and an air guide pipe 92, one end of the air guide pipe is communicated with the air pump 91, the other end of the air guide pipe is communicated with the air inlet pipe 93, and the control of the flame temperature can be realized by adjusting the air supply quantity of the air pump 91.
One end of the air duct 92 passes through the air inlet pipe 93 and is communicated with the inner cavity of the air inlet pipe 93. Wherein, the air duct 92 is flush with the inner wall of the air inlet pipe 93, and the included angle between the axial line of the pipe section at the joint of the air duct 92 and the air inlet pipe 93 and the axial line of the air inlet pipe 93 is 10-80 degrees. By the above angle setting to the air injection direction, the air flow injected into the discharge tube 73 by the sheet is a vortex air flow. Therefore, when the plasma flame is sprayed out from the fire outlet 731, the flame can be better contacted with a heated object, and the heat transfer efficiency is improved.
By arranging the air inlet pipe 93, when the microwave plasma generating device is used, the conductor is used for absorbing microwave energy and the air inlet pipe 93 generates instantaneous flashover, so that seed electrons are provided, and microwave plasma is easy to excite; after the microwave plasma is excited, the microwave energy is transferred into the plasma, the ignition conductor 74 does not absorb the energy, and the flashover time is very short; because the working gas enters the core area of the microwave plasma in a vortex mode, a certain distance is reserved between the microwave plasma and the inner wall of the discharge tube 73, and meanwhile the working gas also plays a cooling role. Combining the above two effects, the ignition conductor 74 life is greatly extended. After the microwave plasma is extinguished accidentally, the conductor absorbs the microwave energy and ignites again, so that the plasma can be re-ignited.
The novel household microwave plasma wall-mounted furnace does not need an electrode for ignition, so that the ablation of flame to the electrode is reduced, and the novel household microwave plasma wall-mounted furnace has longer service life. In addition, when the novel household microwave plasma wall-mounted furnace is used, high voltage is not required to be provided by large transformer equipment, ignition can be realized only by 1kW-3kW, high-temperature (about 2000 ℃) flame can be rapidly generated, energy consumption is low, and the novel household microwave plasma wall-mounted furnace is more energy-saving and environment-friendly.
This technical scheme not only can be used to the hanging stove, also can be used to domestic water heater field. Also, the morphology of the microwave plasma in the heat exchanger is not limited by the present application. As long as microwave plasma is used for heating, whether the heating substance is liquid or gas, and whether the plasma module and the heat exchanger are integrated or separated, the microwave plasma can be covered by the patent.

Claims (9)

1. The utility model provides a novel domestic hanging stove of microwave plasma, includes combustion chamber (1) and installs main heat exchanger (3) in combustion chamber (1), its characterized in that: the plasma torch is characterized by further comprising a torch generator (7), a microwave plasma generating device power supply (8) and an air feeding module (9), wherein the torch generator (7) is installed in the combustion chamber (1) and comprises a microwave resonance cavity (71), a microwave generator (72) arranged on the lower side of the microwave resonance cavity (71) and a discharge tube (73) arranged in the microwave resonance cavity (71), and an ignition conductor (74) is embedded in the discharge tube (73); the upper end of the discharge tube (73) is provided with a fire outlet, the lower end of the discharge tube is provided with an air inlet, and the air supply module (9) is connected to the air inlet; the power supply (8) of the microwave plasma generating device is electrically connected with the torch generator (7).
2. A novel microwave plasma household wall hanging oven as claimed in claim 1, characterized in that: the air supply module (9) comprises an air inlet pipe (93) communicated with the discharge pipe (73), an air guide pipe (92) and an air pump (91) for introducing working gas into the air guide pipe (92), wherein one end of the air guide pipe (92) penetrates through the side wall of the air inlet pipe (93) and is communicated with the inner cavity of the air inlet pipe (93).
3. A novel microwave plasma household wall hanging oven as claimed in claim 2, characterized in that: the outlet end of the air duct (92) is flush with the inner wall of the air inlet pipe (93), and the included angle between the axial line of the pipe section at the joint of the air duct (92) and the air inlet pipe (93) and the axial line of the air inlet pipe (93) is 10-80 degrees.
4. A novel microwave plasma household wall hanging oven as claimed in claim 1, characterized in that: the discharge tube (73) adopts a quartz microwave discharge tube (73).
5. A novel microwave plasma household wall hanging oven as claimed in claim 1, characterized in that: the ignition conductor (74) is annularly attached to the inner wall of the discharge tube (73).
6. A novel microwave plasma household wall hanging oven as claimed in claim 5, characterized in that: the side wall of the ignition conductor (74) extends toward the axial line side of the discharge tube (73) to form a discharge tip (741).
7. A novel microwave plasma household wall hanging oven as claimed in claim 1, characterized in that: the novel household microwave plasma wall-mounted furnace also comprises a plate-type heat exchanger (4), wherein the plate-type heat exchanger (4) is provided with a hot water inlet end (41) and a hot water outlet end (42), and the hot water inlet end (41) is provided with an electric three-way valve which is connected with the water outlet end of the main heat exchanger (3); the four-way joint is installed at the hot water outlet end (42), the water pump (6) is connected with the four-way joint, and the output end of the water pump (6) is communicated with the water inlet end of the main heat exchanger (3).
8. A novel microwave plasma household wall hanging oven as claimed in claim 7, characterized in that: the four-way is also connected with an expansion tank (5).
9. A novel microwave plasma household wall hanging oven as claimed in claim 1, characterized in that: the top cover of combustion chamber (1) is equipped with collection petticoat pipe (2), install fan (21) on collection petticoat pipe (2), the air outlet and the outside intercommunication of fan (21).
CN201920499905.6U 2019-04-12 2019-04-12 Novel household microwave plasma wall-mounted furnace Expired - Fee Related CN210197678U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920499905.6U CN210197678U (en) 2019-04-12 2019-04-12 Novel household microwave plasma wall-mounted furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920499905.6U CN210197678U (en) 2019-04-12 2019-04-12 Novel household microwave plasma wall-mounted furnace

Publications (1)

Publication Number Publication Date
CN210197678U true CN210197678U (en) 2020-03-27

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Application Number Title Priority Date Filing Date
CN201920499905.6U Expired - Fee Related CN210197678U (en) 2019-04-12 2019-04-12 Novel household microwave plasma wall-mounted furnace

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111502940A (en) * 2020-04-29 2020-08-07 武汉大学 Microwave air plasma water vapor injection pushing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111502940A (en) * 2020-04-29 2020-08-07 武汉大学 Microwave air plasma water vapor injection pushing device

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