Furnace end capable of improving thermal efficiency of electric flame stove

Abstract

The utility model discloses a furnace end for improving the thermal efficiency of an electric flame stove, which comprises a hearth outer wall, a hearth inner wall and a plurality of groups of electrode assemblies, and a hollow furnace end cavity is defined by the hearth outer wall and the hearth inner wall; an air inlet is formed in the outer wall of the hearth, the section of the air inlet and the section of the furnace end cavity are spiral, and the other end of the air inlet is connected with an air inlet fan; a plurality of flow guide holes are further formed in the pipe wall of the upper end of the ceramic pipe, and the furnace end cavity and the plasma channel are communicated through the flow guide holes. Spiral airflow generated in the furnace end cavity sucks heat energy of the inner wall and the outer wall of the hearth, so that the temperature of the inner wall and the outer wall of the hearth is reduced, and after heat dissipated by the inner wall and the outer wall of the hearth is recycled by the spiral airflow, hot airflow enters the plasma channel from the flow guide holes in the ceramic tube. The hot airflow and the plasma are subjected to sufficient heat exchange and energy coupling, and the working media are mixed to form plasma jet flow under the action of aerodynamic force. According to the technical scheme, heat dissipated by the furnace end part is recycled, the heat utilization efficiency is improved, and heat loss is reduced.

Description

Technical Field

[0001] The utility model particularly relates to a burner head which improves the thermal efficiency of an electric flame stove. Background Art

[0002] The electric flame stove is a new type of stove that uses electricity to generate fire without fuel. It uses clean electricity as energy, is based on low-temperature thermal plasma technology, and has a plasma torch that outputs stable power at multiple points to achieve cooking functions. As a civilian stove, thermal efficiency is a relatively important parameter. The electric flame stove heats quickly, with a maximum temperature of up to 1200° or even higher, while the heat absorption rate of a wok can only reach about 50%, and most of the heat energy generated by the electric flame stove is not used.

[0003] In view of this, the research and development of electric flame stoves is always ongoing. For example, the utility model patent with patent number 202322987301.5 proposes a plasma stove with external circulation of working medium and cooling function, including: multiple ground electrode conductive cylinders, multiple high-voltage electrodes, a panel, a base, a control module and a transformer module arranged on the base; the inside of the ground electrode conductive cylinder is a hollow structure forming a main channel, one end of the ground electrode conductive cylinder is arranged on a ceramic tube, the ceramic tube is provided with an air guide hole and is connected to the main channel; the high-voltage electrode is arranged in the middle of the ceramic tube and forms a circuit return with the ground electrode conductive cylinder; the panel is provided with a stove top plate, the stove top plate is provided with multiple air guide cylinders corresponding to the ground electrode conductive cylinders, and the air guide cylinders and the ground electrode conductive cylinders form a cooling channel; the prior art cools the ceramic tube, the ground electrode conductive cylinder and the high-voltage electrode by inhaling air outside the stove body, and the hot air that takes away the heat couples the energy of the arc to form a working medium, thereby improving the heating efficiency of the electric flame stove.

[0004] However, in the furnace of the above utility model, the residual heat generated after the plasma heats the frying pan is absorbed by the furnace wall and then dissipated, resulting in a lot of heat loss. The utility model makes more heat reusable through technical improvements. Utility Model Content

[0005] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.

[0006] A burner head for improving the thermal efficiency of an electric flame stove comprises a furnace outer wall, a furnace inner wall and a plurality of electrode assemblies, wherein the furnace outer wall and the furnace inner wall together form a hollow burner head cavity;

[0007] A plasma channel is formed inside the electrode assembly. The electrode assembly includes a flame jet pipe, a ceramic pipe, and an electrode needle. The bottom end of the flame jet pipe is disposed at the bottom of the inner wall of the furnace chamber, and its upper end extends upward through the bottom of the inner wall of the furnace chamber. The inner diameter of the upper end of the ceramic pipe is larger than that of the lower end, and its lower end extends downward through the bottom of the outer wall of the furnace chamber. The bottom of the flame jet pipe abuts against the top surface of the ceramic pipe. The electrode needle is disposed inside the ceramic pipe, and its upper end extends toward the flame jet pipe;

[0008] An air inlet is provided on the outer wall of the furnace chamber. The air inlet and the cross-section of the furnace head cavity are spiral, and the other end of the air inlet is connected to an air inlet fan; A plurality of diversion holes are also provided on the upper end wall of the ceramic pipe, and the diversion holes communicate the furnace head cavity and the plasma channel;

[0009] Preferably, the outer wall of the furnace chamber, the inner wall of the furnace chamber, and the flame jet pipe are all made of high-temperature resistant stainless steel;

[0010] Preferably, at least four pot pads 5 are installed on the folded edge at the top end of the outer wall of the furnace chamber;

[0011] Preferably, a nearly closed heating furnace chamber is formed between the inner wall of the furnace chamber and the wok, and a gap is left between the inner wall of the furnace chamber and the wok;

[0012] Preferably, the outer wall of the furnace chamber and the inner wall of the furnace chamber are on the same axis;

[0013] Preferably, the included angle between the connection line between the entrance of the diversion hole on the ceramic pipe and the center of the ceramic pipe and the direction of the diversion hole is 35° to 40°;

[0014] Preferably, the flame jet pipe, the ceramic pipe, and the electrode needle of the same group of electrode assemblies are on the same axis.

[0015] Compared with the prior art, the advantages of the present invention are as follows: The spiral air flow generated in the furnace head cavity of the present invention sucks the heat energy of the inner wall and the outer wall of the furnace chamber, so that the temperatures of the inner wall and the outer wall of the furnace chamber are reduced. After the heat dissipated by the inner wall and the outer wall of the furnace chamber is recovered by the spiral air flow, the hot air flow enters the plasma channel through the diversion holes on the ceramic pipe. The hot air flow undergoes sufficient heat exchange and energy coupling with the plasma. Under the action of aerodynamic force, the mixed working medium forms a plasma jet. The technical solution of the present invention recovers the heat dissipated by the furnace head part, improves the heat utilization efficiency, and reduces heat loss.

[0016] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a schematic structural diagram of the present invention.

[0019] Figure 2 is a top view of the present invention.

[0020] Figure 3 is Figure 2 the sectional view taken along line A-A in

[0021] Figure 4 is Figure 3 the enlarged view within circle B in

[0022] Figure 5 is a sectional view of the ceramic tube. Detailed implementation manners

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0025] In addition, in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can also be the communication inside two elements. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] In addition, the technical features involved in different embodiments of the present utility model described hereinafter can be combined with each other as long as they do not conflict with each other.

[0027] Please refer to Figures 1 - 3 , in the embodiment of the present utility model, a burner head for improving the thermal efficiency of an electric flame stove includes a furnace outer wall 1, a furnace inner wall 2, and multiple groups of electrode assemblies. The furnace outer wall 1 and the furnace inner wall 2 enclose a hollow burner head cavity.

[0028] In the embodiment of the present utility model, Figure 4 As shown, a plasma channel is formed inside the electrode assembly. The electrode assembly includes a flame spray pipe 31, a ceramic pipe 32, and an electrode pin 33. The bottom end of the flame spray pipe 31 is arranged at the bottom of the furnace inner wall 2 and its upper end extends upward through the bottom of the furnace inner wall 2. The inner diameter of the upper end of the ceramic pipe 32 is larger than that of its lower end and its lower end extends downward through the bottom of the furnace outer wall 1. The bottom of the flame spray pipe 31 abuts against the top surface of the ceramic pipe 32. The electrode pin 33 is arranged inside the ceramic pipe 32 and its upper end extends towards the flame spray pipe 31.

[0029] Specifically, there is a voltage difference between the high-voltage electrode and the flame spray pipe 31. The high voltage breaks down the gas to maintain conductivity, and the broken-down gas is ionized to form plasma, which can reach above 1200 °C. While the plasma heats the frying pan, part of the heat is absorbed by the flame spray pipe 31 and the furnace inner wall 2, and the heat is transferred to the furnace outer wall 1, causing part of the heat to be dissipated.

[0030] As Figures 1 - 2 shown, in the embodiment of the present utility model, in order to fully heat the air entering the burner head cavity before entering the plasma channel inside the electrode assembly, an air inlet 11 is provided on the furnace outer wall 1. The air inlet 11 is spiral with the cross-section of the burner head cavity, and the other end of the air inlet 11 is connected to an air intake fan 4. The air inhaled by the air intake fan 4 enters the burner head cavity through the air inlet 11. The gas spirally flows in the burner head cavity and the air flow inhales the thermal energy of the furnace inner wall 2 and the furnace outer wall 1, reducing the temperatures of the furnace inner wall 2 and the furnace outer wall 1.

[0031] A plurality of diversion holes 321 are also provided on the upper end pipe wall of the ceramic pipe 32. The diversion holes 321 connect the burner head cavity and the plasma channel. After the heat dissipated by the furnace inner wall 2 and the furnace outer wall 1 is recovered by the spiral air flow, the hot air flow enters the plasma channel through the diversion holes 321 on the ceramic pipe 32. The hot air flow undergoes sufficient heat exchange and energy coupling with the plasma, and under the action of aerodynamic force, the mixed working medium forms a plasma jet. The technical solution of the present utility model recovers part of the heat dissipated by the burner head, improves the heat utilization efficiency, and reduces heat loss.

[0032] In another embodiment of the present utility model, the furnace outer wall 1, the furnace inner wall 2, and the flame spray pipe 31 are all made of high-temperature resistant stainless steel.

[0033] In another embodiment of the present utility model, at least four pot pads 5 are installed at the top folded edge of the outer wall 1 of the furnace chamber to ensure the gap between the wok and the furnace chamber, allowing air to circulate and perform external circulation.

[0034] In another embodiment of the present utility model, a nearly closed heating furnace chamber is formed between the inner wall 2 of the furnace chamber and the wok, enabling the heat in the furnace chamber to stay within the furnace chamber.

[0035] In another embodiment of the present utility model, the outer wall 1 and the inner wall 2 of the furnace chamber are on the same axis.

[0036] As Figure 5 shown, in another embodiment of the present utility model, the included angle R between the connection line between the inlet of the diversion hole 321 on the ceramic tube 32 and the center of the ceramic tube 32 and the direction of the diversion hole 321 is 35° to 40°, making the diversion hole 321 form a spiral shape with the wall of the ceramic tube 32, minimizing the loss of aerodynamic force of the air flow to the greatest extent and keeping the air flow at a certain velocity.

[0037] In another embodiment of the present utility model, the flame jet pipe 31, the ceramic tube 32, and the electrode needle 33 of the same set of electrode assemblies are on the same axis, and a uniform spiral channel is formed between the flame jet pipe 31 and the ceramic tube 32 and the electrode needle 33, making the rotational movement of the air flow smoother and reducing the loss of aerodynamic force.

[0038] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model.

Claims

1. A burner head for improving the thermal efficiency of an electric flame stove, comprising a furnace outer wall, a furnace inner wall and a plurality of electrode assemblies, characterized in that: The furnace outer wall and the furnace inner wall together form a hollow furnace head cavity; A plasma channel is formed inside the electrode assembly, and the electrode assembly includes a flame-spraying tube, a ceramic tube and an electrode needle. The bottom end of the flame-spraying tube is arranged at the bottom of the inner wall of the furnace, and the upper end thereof passes through the bottom of the inner wall of the furnace and extends upward. The inner tube diameter of the upper end of the ceramic tube is larger than the inner tube diameter of the lower end thereof, and the lower end thereof passes through the bottom of the outer wall of the furnace and extends downward. The bottom of the flame-spraying tube abuts against the top surface of the ceramic tube. The electrode needle is arranged inside the ceramic tube, and the upper end thereof extends toward the flame-spraying tube. An air inlet is provided on the outer wall of the furnace, the air inlet and the furnace head cavity cross section are spiral, and the other end of the air inlet is connected to an air intake fan; The tube wall at the upper end of the ceramic tube is also provided with a plurality of guide holes, and the guide holes communicate with the furnace head cavity and the plasma channel.

2. The burner head for improving the thermal efficiency of an electric flame stove according to claim 1, characterized in that: The furnace outer wall, furnace inner wall and flame-spraying tube are all made of high-temperature resistant stainless steel.

3. The burner head for improving the thermal efficiency of an electric flame stove according to claim 2, characterized in that: At least four pot pads are installed on the top folded edge of the furnace outer wall.

4. The burner head for improving the thermal efficiency of an electric flame stove according to claim 3, characterized in that: A nearly closed heating furnace is formed between the inner wall of the furnace and the frying pan, and a gap is left between the inner wall of the furnace and the frying pan.

5. The burner head for improving the thermal efficiency of an electric flame stove according to claim 1, characterized in that: The outer wall and the inner wall of the furnace are on the same axis.

6. The burner head for improving the thermal efficiency of an electric flame stove according to claim 1, characterized in that: The line between the entrance of the flow guide hole on the ceramic tube and the center of the ceramic tube forms an angle of 35° to 40° with the direction of the flow guide hole.

7. The burner head for improving the thermal efficiency of an electric flame stove according to claim 6, characterized in that: The flame-spraying tube, the ceramic tube and the electrode needle of the same group of electrode assemblies are on the same axis.

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