WO2021088408A1

WO2021088408A1 - Electric heating device and electric flame stove

Info

Publication number: WO2021088408A1
Application number: PCT/CN2020/102410
Authority: WO
Inventors: 卢驭龙
Original assignee: 德驭新能源科技(苏州)有限公司
Priority date: 2019-11-06
Filing date: 2020-07-16
Publication date: 2021-05-14
Also published as: CN211019404U

Abstract

An electric heating device and an electric flame stove, relating to the technical field of electric heating. The electric heating device comprises a burner (10), a boosting unit (30) for connecting an external power supply (40) and generating a high-voltage signal, and at least two heating units (20) mounted on the burner (10); each heating unit (20) comprises a first discharge needle (201) and a second discharge needle (202), the first discharge needle (201) is connected to a first output end of the boosting unit (30), and the second discharge needle (202) is connected to a second output end of the boosting unit (30); the first discharge needle (201) and the second discharge needle (202) each carry the high-voltage signals by means of the boosting unit (30), and discharge each other to generate electric arcs to break down the air to form a high-temperature plasma airflow to heat cookware. The electric heating device can heat any kind of cookware.

Description

Electric heating device and electric flame stove

This application claims the priority of the Chinese patent application filed at the Chinese Patent Office on November 6, 2019, with the application number 201921904386.3 and the invention title "electric heating device and electric flame cooker", the entire content of which is incorporated herein by reference. Applying.

Technical field

This application relates to the technical field of electric heating, and in particular to an electric heating device and an electric flame stove.

Background technique

Electric flame stove is a heating device that generates a plasma torch (i.e. flame) by boosting the mains power to make the arc pierce the air to generate a fire with electricity.

At present, a plurality of discharge needles and grounded conductive supports are installed on the burner of an electric flame stove, and a metal pot is required. When in use, the pot is placed on the conductive support to realize the earthing of the pot, and the electric discharge installed on the stove head discharges against the bottom of the pot, generating an electric arc to break down the air to form a plasma torch to heat the pot. This kind of electric flame stove can only use metal pots, and cannot use non-conductive pots such as casserole and porcelain pots, which limits the types of pots used.

technical problem

One of the objectives of the embodiments of the present application is to provide an electric heating device and an electric flame stove to solve the problem that the electric flame stove restricts the types of pots and utensils used.

Technical solutions

In order to solve the above technical problems, the technical solutions adopted in the embodiments of this application are:

In a first aspect, an electric heating device is provided, which includes a furnace head, and further includes a boost unit for connecting an external power source and generating a high-voltage signal, and at least two heating units installed on the furnace head;

Each of the heating units includes a first discharge needle and a second discharge needle. The first discharge needle is connected to the first output terminal of the boost unit, and the second discharge needle is connected to the first output terminal of the boost unit. Two output terminals are connected;

Wherein, the first discharge needle and the second discharge needle respectively carry high voltage signals through the boosting unit, and discharge each other to generate an arc to break down the air to form a high-temperature plasma flow to heat the pot.

In a possible implementation manner of the first aspect, the boost unit includes a boost circuit and a discharge circuit corresponding to the heating unit one-to-one;

The input terminal of the boost circuit is used to connect to the external power supply, the first output terminal of the boost circuit is connected to the first input terminal of the discharge circuit, and the second output terminal of the boost circuit is connected to the The second input terminal of the discharge circuit, the first output terminal of the discharge circuit is connected to the first discharge needle, and the second output terminal is connected to the second discharge needle.

In a possible implementation of the first aspect, the step-up circuit includes a step-up transformer, an input end of the step-up transformer is used to connect to the external power source, and a first output end of the step-up transformer is connected to The first input terminal of the discharge circuit and the second output terminal of the step-up transformer are connected to the second input terminal of the discharge circuit.

In a possible implementation of the first aspect, the discharge circuit includes a first capacitor and a second capacitor, and the first capacitor is connected in series to the first discharge needle and the first output of the boost circuit. Between the terminals, the second capacitor is connected in series between the second discharge needle and the second output terminal of the boost circuit.

In a possible implementation of the first aspect, the first output terminal or the second output terminal of the boost unit is grounded.

In a possible implementation of the first aspect, the electric heating device further includes a voltage doubling unit, a third discharge needle, and a fourth discharge needle, and the first input end of the voltage doubling unit is connected to the first input terminal of the boosting unit. An output terminal, the second input terminal of the voltage doubling unit is connected to the second output terminal of the boosting unit, the first output terminal of the voltage doubling unit is connected to the third discharge needle, and the voltage doubling unit The second output terminal is connected to the fourth discharge pin.

In a possible implementation manner of the first aspect, the voltage doubling unit includes a first diode, a second diode, a third diode, a third capacitor, a fourth capacitor, and a fifth capacitor;

One end of the third capacitor is connected to the first output end of the boost unit, and the other end of the third capacitor is respectively connected to the cathode of the first diode, the anode of the second diode, and the second diode. One end of the fourth capacitor, the other end of the fourth capacitor are respectively connected to the cathode of the third diode and the third discharge pin, and the anode of the third diode is respectively connected to the second and second terminals. The cathode of the pole tube and one end of the fifth capacitor, and the other end of the fifth capacitor is respectively connected to the anode of the first diode, the second output end of the boost unit and the fourth discharge pin .

In a possible implementation manner of the first aspect, the fourth discharge needle is grounded.

In a possible implementation of the first aspect, the distance between the first discharge needle and the second discharge needle in the same heating unit is smaller than the distance between two heating units.

In a second aspect, an electric flame cooker is provided, and the electric flame cooker includes the electric heating device described in the first aspect.

Beneficial effect

The beneficial effect of the electric heating device provided by the embodiment of the present application is that the boost unit obtains a high voltage signal by boosting the voltage signal of the external power supply, and the first discharge needle and the second discharge needle in each heating unit are respectively connected to the boost unit The first output terminal and the second output terminal, the first discharge needle and the second discharge needle both carry high-voltage signals, and the first discharge needle and the second discharge needle in the same heating unit discharge each other, resulting in arc breakdown The air forms a high-temperature plasma torch to heat the pots placed on the furnace head. When the arc breaks down the air to form a high-temperature plasma torch, there is no need for pots to participate in the discharge circuit, so the electric heating device can heat any kind of pots.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the accompanying drawings in the following description are only of the present application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of an electric heating device provided by an embodiment of the present application;

2 is a schematic diagram of the circuit connection of the electric heating device provided by the embodiment of the present application;

Fig. 3 is a schematic diagram of circuit connection of an electric heating device provided by another embodiment of the present application.

In the figure: 10, furnace head; 20, heating unit; 201, first discharge needle; 202, second discharge needle; 30, boost unit; 40, external power supply; 50, voltage doubler unit; 60, third discharge needle ; 70. The fourth discharge needle.

Embodiments of the present invention

In the following description, for the purpose of illustration rather than limitation, specific details such as a specific system structure and technology are proposed for a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from obstructing the description of this application.

In order to illustrate the technical solution described in the present application, specific embodiments are used for description below.

As shown in FIG. 1, a schematic structural diagram of an electric heating device provided by an embodiment of this application. The electric heating device may include a furnace head 10, a booster unit 30 for connecting an external power source 40 and generating a high-voltage signal, and a furnace head 10. Each heating unit 20 includes a first discharge needle 201 and a second discharge needle 202. The first discharge needle 201 is connected to the first output end of the boost unit 30, and the second discharge needle 202 is connected to The second output terminal of the boost unit 30 is connected.

During use, the boost unit 30 boosts the signal input from the external power supply 40 to obtain a high-voltage signal with a sufficiently high voltage. The boost unit 30 loads the generated high-voltage signal to the first discharge needle 201 and the second discharge needle 202, respectively. Above, since the first discharge pin 201 and the second discharge pin 202 are respectively connected to the first output terminal and the second output terminal of the boost unit 30, the voltage signal on the first discharge pin 201 and the voltage on the second discharge pin 202 are The signal phase difference is 180 degrees. The first discharge needle 201 and the second discharge needle 202 in the same heating unit 20 discharge each other, and the generated arc breaks down the air to generate a high-temperature plasma flow (plasma torch). Each heating unit 20 can generate a high-temperature plasma stream by breaking down the air to heat the pot placed on the furnace head 10. Since the participation of pots is not required in the process of generating high-temperature plasma gas, the electric heating device can heat any kind of pots.

It should be noted that in FIG. 1, the first discharge needle 201 is represented by a triangle, and the second discharge needle 202 is represented by a circle. This drawing method is only to facilitate the distinction between the first discharge needle 201 and the second discharge needle 202. Any restrictions on the first discharge needle 201 and the second discharge needle 202 are involved.

In one embodiment, the distance between the first discharge needle 201 and the second discharge needle 202 in the same heating unit 20 is smaller than the distance between the two heating units 20. This design can ensure the first discharge in the same heating unit 20. Discharge is performed between the needle 201 and the second discharge needle 202, and the discharge needles between two adjacent heating units 20 will not discharge each other.

As shown in FIG. 2, a schematic diagram of the circuit connection of the electric heating device provided by this embodiment of the application. The boosting unit 30 in the electric heating device may include a boosting circuit and a discharge circuit corresponding to the heating unit 20 one-to-one. The input terminal of the boost circuit is used to connect the external power supply 40, the first output terminal of the boost circuit is connected to the first input terminal of the discharge circuit, the second output terminal of the boost circuit is connected to the second input terminal of the discharge circuit, and the first output of the discharge circuit The terminal is connected to the first discharge pin 201, and the second output terminal is connected to the second discharge pin 202.

The booster circuit boosts the voltage signal input by the external power supply 40 to obtain a high-voltage signal with a sufficiently large voltage. The discharge circuit controls the high-voltage signal output by the booster circuit to load the first discharge needle 201 and the second discharge needle 201 in the corresponding heating unit 20, respectively. On the discharge pin 202, since the first discharge pin 201 and the second discharge pin 202 are respectively connected to the first output terminal and the second output terminal of the discharge circuit, the voltage signal on the first discharge pin 201 and the voltage signal on the second discharge pin 202 are The phase difference of the voltage signal is 180 degrees. The first discharge needle 201 and the second discharge needle 202 in the same heating unit 20 discharge each other, and the generated arc breaks down the air to generate a high-temperature plasma flow (plasma torch). Each heating unit 20 can generate a high-temperature plasma stream by breaking down the air to heat the pot placed on the furnace head 10. Since the participation of pots is not required in the process of generating high-temperature plasma gas, the electric heating device can heat any kind of pots.

Specifically, the booster circuit can be designed according to usage requirements. The booster circuit can use a circuit composed of transformers, electronic chips or other devices to achieve the voltage signal of the external power supply 40 to the required voltage, so as to meet the requirements of air breakdown. A high-temperature plasma stream is formed.

In one embodiment, the step-up circuit may include a step-up transformer T, the input end of the step-up transformer T is used to connect the external power source 40, the first output end of the step-up transformer T is connected to the first input end of the discharge circuit, and the step-up transformer T The second output terminal of the transformer T is connected to the second input terminal of the discharge circuit.

Wherein, the step-up transformer T boosts the voltage signal input by the external power supply 40 to obtain a high-voltage signal, which is sufficient to break down the air and form a high-temperature plasma flow.

In addition, a master control switch can also be connected in series between the input terminal of the step-up transformer T and the external power source 40, and the working state of the step-up transformer T can be controlled through the master control switch. When the main control switch is turned off, the external power supply 40 and the step-up transformer T are non-conducting, and the step-up transformer T does not work; when the main control switch is closed, the external power supply 40 and the step-up transformer T are turned on, and the step-up transformer T works , The signal of the external power supply 40 is boosted.

In one embodiment, the discharge circuit may include a first capacitor C1 and a second capacitor C2. The first capacitor C1 is connected in series between the first discharge pin 201 and the first output terminal of the boost circuit, and the second capacitor C2 is connected in series. Between the second discharge pin 202 and the second output terminal of the boost circuit.

The high voltage signal generated by the booster circuit is loaded on the first discharge needle 201 through the first capacitor C1, and on the second discharge needle 202 through the second capacitor C2, and discharge is performed between the first discharge needle 201 and the second discharge needle 202. During the discharging process, the first capacitor C1 and the second capacitor C2 play a role in energy storage, which can ensure continuous discharge between the first discharge needle 201 and the second discharge needle 202, and break down the first discharge needle 201 and the second discharge needle 202. The air in between forms a high-temperature plasma stream, which heats the pots placed on the furnace head 10.

Specifically, the first capacitor C1 and the second capacitor C2 can be selected as (5-40pF)/(10KV-50KV) high-voltage capacitors.

In one embodiment, the first output terminal or the second output terminal of the boost unit 30 is grounded, that is, the first discharge needle 201 or the second discharge needle 202 in the same heating unit 20 is connected to the ground. When the first discharge needle 201 is grounded, the second discharge needle 202 is loaded with a high voltage signal, and the second discharge needle 202 discharges to the first discharge needle 201, and the arc breaks down the air to form a high-temperature plasma flow; when the second discharge needle 202 When grounded, the first discharge needle 201 is loaded with a high-voltage signal, and the first discharge needle 201 discharges the second discharge needle 202, and the arc breaks down the air to form a high-temperature plasma stream, which heats the pot placed on the furnace head 10.

As shown in FIG. 3, a schematic diagram of the circuit connection of the electric heating device provided by another embodiment of this application. In addition to the parts shown in FIG. 2, the electric heating device may also include a voltage doubler unit 50 and a third discharge needle 60. And the fourth discharge pin 70, the first input end of the voltage doubler unit 50 is connected to the first output end of the boost unit 30, the second input end of the voltage doubler unit 50 is connected to the second output end of the boost unit 30, and the voltage doubler unit The first output terminal of 50 is connected to the third discharge pin 60, and the second output terminal of the voltage multiplier unit 50 is connected to the fourth discharge pin 70.

Specifically, the function of the voltage multiplier unit 50 is to further boost the high voltage signal output by the boost unit 30 to obtain an ultra-high voltage signal (the ultra-high voltage signal has no specific meaning. Here, in order to distinguish the high voltage signal output by the boost unit 30, Therefore, the signal output by the voltage doubler unit 50 is called an ultra-high voltage signal), and the obtained ultra-high voltage signal is loaded on the third discharge needle 60 and the fourth discharge needle 70 respectively, and the ultra-high voltage signal on the third discharge needle 60 and the fourth discharge needle 60 The phase difference of the ultra-high voltage signal on the discharge needle 70 is 180 degrees. Therefore, a discharge occurs between the third discharge needle 60 and the fourth discharge needle 70, and an arc is generated to break down the air to form a high-temperature plasma flow.

Since the third discharge needle 60 and the fourth discharge needle 70 are loaded with ultra-high voltage signals, the air can be quickly broken down to form a plasma flow, thereby increasing the concentration of air plasma. When the plasma concentration in the air increases, the difficulty for the arc generated between the first discharge needle 201 and the second discharge needle 202 to break through the air can be reduced. Therefore, the voltage of the signal loaded on the first discharge needle 201 and the second discharge needle 202 can be appropriately reduced, thereby improving the safety of the device.

It should be noted that the first discharging needle 201, the second discharging needle 202, the third discharging needle 60, and the fourth discharging needle 70 can use the same type and model of conductive needles. This application only names the components for the convenience of description. Different names. The UHV signal has no specific meaning, just to distinguish it from the signal output by the booster unit 30 being a high voltage signal, so the signal output by the voltage multiplier unit 50 is named an UHV signal, the voltage of the UHV signal is greater than the voltage of the high voltage signal .

In one embodiment, the voltage doubler unit 50 can boost the signal output by the boost unit 30 by a set multiple, and the boost multiple can be set according to actual needs. The following uses the double boost unit 50 as an example of double boost Explain that the voltage output by the output unit is U.

Specifically, the voltage doubling unit 50 includes a first diode D1, a second diode D2, a third diode D3, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5, one end of the third capacitor C3 Connected to the first output end of the boost unit 30, the other end of the third capacitor C3 is respectively connected to the cathode of the first diode D1, the anode of the second diode D2, and one end of the fourth capacitor C4. The other end is respectively connected to the cathode of the third diode D3 and the third discharge pin 60, and the anode of the third diode D3 is respectively connected to the cathode of the second diode D2 and one end of the fifth capacitor C5. The other end is respectively connected to the anode of the first diode D1, the second output end of the boost unit 30 and the fourth discharge pin 70.

When the first output terminal of the boost unit 30 is positive and the second output terminal is negative, the third capacitor C3 is charged through the first diode D1, and the voltage of the third capacitor C3 after charging is U; When the first output terminal of 30 is negative and the second output terminal is positive, the fifth capacitor C5 is charged through the second diode D2. After charging, the voltage of the fifth capacitor C5 is 2U; when the first output of the boost unit 30 When the terminal is positive and the second output terminal is negative, the fourth capacitor C4 is charged through the third diode D3, and the voltage across the fourth capacitor C4 is 2U after charging. The signal voltage on the third discharge needle 60 is 3U, the voltage signal on the fourth discharge needle 70 is U, and the pressure difference between the third discharge needle 60 and the fourth discharge needle 70 is 2U, which can achieve high-voltage discharge and easily blow air. The plasma flow is generated through the air flow, which increases the plasma concentration in the air, reduces the high voltage requirements of the first discharge needle 201 and the second discharge needle 202 in the heating unit 20, and can appropriately reduce the voltage of the output signal of the boost unit 30 to improve the use of the device. safety.

In one embodiment, the fourth discharge needle 70 is grounded, the voltage loaded by the third discharge needle 60 is an ultra-high voltage signal, and the fourth discharge needle 70 is grounded. After the boost is completed, the voltage of the third discharge needle 60 is 3U, and the fourth discharge needle 60 is grounded. The discharge needle 70 is grounded, the voltage is zero, and the pressure difference between the third discharge needle 60 and the fourth discharge needle 70 is 3U, so that the third discharge needle 60 can discharge to the fourth discharge needle 70, and the generated arc can be The air is broken down to form a plasma stream, which increases the concentration of plasma in the air near the furnace head 10.

The embodiment of the present application also discloses an electric flame stove, which includes the above-mentioned electric heating device. During the use of the electric flame stove, only the discharge needles in each heating unit 20 installed on the furnace head 10 discharge each other to generate an electric arc, and the air is broken down to form a high-temperature plasma flow, and the pot on the furnace head 10 The appliance is heated. There is no need for pots to participate in the process of generating heat, so the electric flame stove can heat any kind of pots.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that it can still implement the foregoing The technical solutions recorded in the examples are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in Within the scope of protection of this application.

Claims

An electric heating device, including a furnace head, characterized in that it also includes a boost unit for connecting an external power source and generating a high-voltage signal, and at least two heating units installed on the furnace head;

Each of the heating units includes a first discharge needle and a second discharge needle. The first discharge needle is connected to the first output terminal of the boost unit, and the second discharge needle is connected to the first output terminal of the boost unit. Two output terminals are connected;

Wherein, the first discharge needle and the second discharge needle respectively carry high voltage signals through the boosting unit, and discharge each other to generate an arc to break down the air to form a high-temperature plasma flow to heat the pot.
The electric heating device according to claim 1, wherein the boosting unit comprises a boosting circuit and a discharge circuit corresponding to the heating unit one-to-one;

The input terminal of the boost circuit is used to connect to the external power supply, the first output terminal of the boost circuit is connected to the first input terminal of the discharge circuit, and the second output terminal of the boost circuit is connected to the The second input terminal of the discharge circuit, the first output terminal of the discharge circuit is connected to the first discharge needle, and the second output terminal is connected to the second discharge needle.
The electric heating device according to claim 2, wherein the step-up circuit comprises a step-up transformer, the input end of the step-up transformer is used to connect the external power source, and the first output of the step-up transformer The terminal is connected to the first input terminal of the discharge circuit, and the second output terminal of the step-up transformer is connected to the second input terminal of the discharge circuit.
The electric heating device according to claim 2, wherein the discharge circuit includes a first capacitor and a second capacitor, and the first capacitor is connected in series with the first discharge needle and the first capacitor of the boost circuit. Between an output terminal, the second capacitor is connected in series between the second discharge needle and the second output terminal of the boost circuit.
The electric heating device according to any one of claims 2 to 4, wherein the first output terminal or the second output terminal of the boost unit is grounded.
The electric heating device according to claim 1, wherein the electric heating device further comprises a voltage doubler unit, a third discharge needle and a fourth discharge needle, and the first input end of the voltage doubler unit is connected to the booster The first output end of the voltage doubler unit, the second input end of the voltage doubler unit is connected to the second output end of the boost unit, the first output end of the voltage doubler unit is connected to the third discharge needle, the The second output end of the voltage doubler unit is connected to the fourth discharge needle.
The electric heating device according to claim 6, wherein the voltage doubling unit comprises a first diode, a second diode, a third diode, a third capacitor, a fourth capacitor, and a fifth capacitor ；

One end of the third capacitor is connected to the first output end of the boost unit, and the other end of the third capacitor is respectively connected to the cathode of the first diode, the anode of the second diode, and the second diode. One end of the fourth capacitor, the other end of the fourth capacitor are respectively connected to the cathode of the third diode and the third discharge pin, and the anode of the third diode is respectively connected to the second and second terminals. The cathode of the pole tube and one end of the fifth capacitor, and the other end of the fifth capacitor is respectively connected to the anode of the first diode, the second output end of the boost unit and the fourth discharge pin .
The electric heating device according to claim 6 or 7, wherein the fourth discharge needle is grounded.
The electric heating device according to claim 1, wherein the distance between the first discharge needle and the second discharge needle in the same heating unit is smaller than the distance between the two heating units.
An electric flame stove, characterized in that the electric flame stove comprises the electric heating device according to any one of claims 1 to 9.