KR102675944B1 - Electric roaster with temperature control using high-frequency solenoids as a heat source - Google Patents

Abstract

The present invention relates to a temperature-controlled electric grill that uses a high-frequency solenoid as a heat source. It does not use a conventional temperature sensor in contact with the baking plate, but uses a circuit board (PCB) as a heat source to heat the baking plate without using a conventional electric heating tube. The heating wire placed on the top of the insulating ceramic sheet is heated by the high-frequency current generated by the ring solenoid that receives high-current high-frequency pulses through the ring solenoid.
According to the present invention, the high-frequency current generated by the ring solenoid can be controlled using a high-current high-frequency pulse, so compared to the case of using a transformer (or transformer circuit) that supplies current to the electric heating tube for heating the baking plate of a conventional electric grill. Thus, heating efficiency can be easily increased while forming a simple heat source structure that is not subject to relatively structural restrictions (e.g., restrictions on increasing the size of the transformer), and heating the heating wire by supplying high-frequency current can reduce the voltage signal that poses a risk of electric shock. It is safe because it does not go in, and because the high-current, high-frequency pulse width can be adjusted, the temperature of the baking plate is set to the optimal temperature (e.g., 175°C, etc.) to prevent meat from sticking without a temperature sensor that is in close contact with the bottom of the baking plate due to its complex structure. It can be controlled accurately, and there is no need to use the electric heating tube, transformer (or transformer circuit), or temperature sensor installed in a complicated structure, so it has the advantage of lower failure rate and improved ease of use.

Description

Electric roaster with temperature control using high-frequency solenoids as a heat source}

The present invention relates to a temperature-controlled electric appliance, and more specifically, to a temperature-controlled electric appliance that uses a high-frequency solenoid as a heat source.

The temperature-controlled electric grill according to Patent Document 1 is designed to constantly control the temperature of the baking plate using a temperature sensor that is in close contact with the bottom of the baking plate in order to solve problems such as bulgogi easily sticking to the baking plate and inconvenience in use when using existing electric grills. This is an invention of the present applicant (or inventor) that ensures that the taste of grilled meat using a baking sheet is fresh and does not stick by precisely controlling the temperature to a preset temperature of 175°C.

The temperature-controlled electric grill according to Patent Document 1 uses an electric heater that uses an electric heating tube that receives current generated by a transformer (or transformer circuit) as a heat source to heat the baking plate, so the electric heating tube does not fall from above. There is a disadvantage of having to install a protective cover to protect against damage by objects, and since the transformer (or transformer circuit) is configured to be included in the control electric circuit integrated on the electric circuit board, it is necessary to increase the heating efficiency of the electric heating tube. There are structural limitations to increasing the performance of transformers (or transformer circuits) (for example, limitations in increasing the size of the transformer).

In addition, the temperature sensor is installed to communicate with the control electric circuit integrated in the electric circuit board through a transmission line, and is installed in the inner cavity of the hollow support that penetrates the protective cover, and is exposed at the top of the hollow support in a height-adjusted state. It has a complex structure that maintains close contact with the bottom of the baking plate.

KR 20-0476178 Y1

The present invention is to solve the above-described conventional problems, and the purpose of the present invention is to heat the baking plate without using a conventional temperature sensor in contact with the baking plate and without using a conventional electric heating tube as a heat source for heating the baking plate and using a circuit board (PCB). It provides a temperature-controlled electric grill using a high-frequency solenoid as a heat source, which heats a heating wire placed on the top of an insulating ceramic sheet by a high-frequency current generated by a ring solenoid that receives a high-current high-frequency pulse through.

In order to achieve the purpose of the present invention as described above, the temperature-controlled electric appliance using a high-frequency solenoid as a heat source according to the present invention is a cylinder with top and bottom open, the lower part is supported in a hanging state by being inserted into the lower cylinder, and a support is formed to protrude in the center of the lower part. An upper cylinder on which an insulating ceramic sheet is supported on the upper surface, and a heating wire disposed on the insulating ceramic sheet is heated by a high-frequency current supplied through a tangential copper piece fixed to the lower part around the pedestal to heat the baking plate; A heating wire disposed on top of the insulating ceramic sheet and heated by a high-frequency current supplied through the tangential copper piece to heat the baking sheet; It is a top-and-bottom open cylinder that forms the inclined side of the upper and lower barrels, and is inserted into the upper opening of the upper cylinder and supported in a state hanging on the edge of the upper cylinder, and heat is blown as a fan disposed on a circuit board (PCB) along the inclined side rotates. An inner cylinder formed with ventilation holes for passing wind for discharge; It is an annular upper open cylinder surrounding the pedestal of the upper cylinder, and is inserted into the lower opening of the inner cylinder and supported in a hanging state on the lower edge of the inner cylinder. It receives oil while grilling meat on a grilling plate and has water inside for convenient cleaning. Filled drip tray; A roasting plate that is inserted into the upper opening of the water pan and supported on the upper edge of the water pan, the central portion of which protrudes upward and forms an inclined surface from the center toward the edge, and the edges of the inclined surface are perforated with oil outflow holes; A windproof shade that is supported in the upper opening of the inner cylinder and blocks wind blowing from the outside (e.g., air conditioner wind), prevents oil from splashing out when grilling meat on a grill, and has the upper opening covered by a lid. ; A lower cylinder that is an open upper cylinder and is coupled to communicate with the upper cylinder that is supported by being inserted into the upper portion and includes an oil pan accommodating portion formed in a concave shape through an opening on one side; It is a cylinder with an open top, and can be inserted into or removed from the grease storage compartment in a drawer manner, and when meat is grilled on the grilling plate in a state accommodated and supported in the grease storage compartment, it flows out through the ventilation holes of the inner cylinder and enters the inner cylinder. An oil pan that collects and accommodates oil that freely falls in the oil; A ring solenoid, which is a high-frequency solenoid and is accommodated inside the lower cylinder and disposed at the bottom of the oil pan accommodating part, and generates a high-frequency current by receiving a high-current high-frequency pulse through a circuit board (PCB); It is housed inside the lower cylinder, receives external power (e.g., 220V or 110V, etc.) through a power connection line, supplies a high-current high-frequency pulse with adjustable pulse width to the ring solenoid, and blows wind for heat dissipation toward the inner cylinder. The circuit board (PCB) on which the fan is installed; And a controller connected to the circuit board (PCB) with a wire outside the lower cylinder and outputting a high-frequency pulse width control signal to turn on/off the power for heating the baking plate and to control the heat power. do.

In the temperature-controlled electric appliance using a high-frequency solenoid as a heat source according to the present invention, the tangential copper piece is screwed and fixed to the lower part around the pedestal, and the screw-coupled portion is covered with a waterproof cover to prevent oil or water from entering the gap. It is characterized by being covered by.

In the temperature-controlled electric appliance using a high-frequency solenoid as a heat source according to the present invention, the tangential copper piece is characterized in that it receives the high-frequency current generated by the ring solenoid through a connection line and transmits it to the heating line.

In the temperature-controlled electric appliance using a high-frequency solenoid as a heat source according to the present invention, the oil pan compartment is made of aluminum so that the heat generated when the ring solenoid generates a high-frequency current is not transmitted to the upper cylinder. It is characterized in that the high-frequency current component is subtracted and the inner bottom is filled with water for convenient cleaning of the oil pan at a water level that does not exceed the lower stop of the oil pan inlet.

In the temperature-controlled electric appliance using a high-frequency solenoid as a heat source according to the present invention, an insulating plate is further installed to insulate between the ring solenoid and the circuit board (PCB).

According to the present invention, the high-frequency current generated by the ring solenoid can be controlled using a high-current high-frequency pulse, so compared to the case of using a transformer (or transformer circuit) that supplies current to the electric heating tube for heating the baking plate of a conventional electric grill. Thus, heating efficiency can be easily increased while forming a simple heat source structure that is not subject to relatively structural restrictions (e.g., restrictions on increasing the size of the transformer), and heating the heating wire by supplying high-frequency current can reduce the voltage signal that poses a risk of electric shock. It is safe because it does not go in, and because the high-current, high-frequency pulse width can be adjusted, the temperature of the baking plate is set to the optimal temperature (e.g., 175°C, etc.) to prevent meat from sticking without a temperature sensor that is in close contact with the bottom of the baking plate due to its complex structure. It can be controlled accurately, and there is no need to use the electric heating tube, transformer (or transformer circuit), or temperature sensor installed in a complicated structure, so it has the advantage of lower failure rate and improved ease of use.

Figure 1 is an embodiment showing the configuration of a temperature-controlled electric grill using a high-frequency solenoid as a heat source according to the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings.

The temperature-controlled electric appliance using a high-frequency solenoid as a heat source according to the present invention described below is not limited to the following examples, and is provided by ordinary knowledge in the relevant technical field without departing from the gist of the technology claimed in the claims. The technical spirit exists to the extent that anyone who has it can change and implement it.

Referring to Figure 1, the temperature-controlled electric grill 100 using a high-frequency solenoid as a heat source according to the present invention includes an upper cylinder 110, an inner cylinder 120, a water pan 130, a baking plate 140, and a windshield ( 150), a lower cylinder 160, an oil pan 170, a ring solenoid 180, a circuit board (PCB) 190, and a controller 190a.

The upper cylinder 110 is a cylinder with open top and bottom, and the lower part is supported in a hanging state by being inserted into the lower cylinder 160, and an insulating ceramic sheet 112 is supported on the upper surface of a pedestal 111 protruding in the center of the lower part, and the insulating ceramic sheet ( 112) The heating wire 112a disposed at the top is heated by high-frequency current supplied through the tangential copper piece 113 fixed to the lower part around the pedestal 111 to heat the baking plate 140.

The tangential copper piece 113 is screwed and fixed to the lower portion around the pedestal 111, and the screw-coupled portion is covered by a waterproof cover 113a to prevent oil or water from entering the gap.

The tangential copper piece 113 receives the high-frequency current generated by the ring solenoid 180 through the connection line 181 and transmits it to the heating line 112a. In this way, when the heating wire (112a) is heated by supplying high-frequency current to the heating wire (112a), it is safe because no voltage signal that may pose a risk of electric shock is input.

The inner cylinder 120 is a vertically open cylinder forming an inclined side of the upper and lower cylinders, is inserted into the upper opening of the upper cylinder 110, is supported while hanging on the edge of the upper cylinder 110, and is provided with a circuit board along the inclined side. Ventilation holes 121 are formed to pass the heat dissipating wind blown by the fan placed on the (PCB) 190 as it rotates.

The water pan 130 is an annular upper open cylinder surrounding the pedestal 111 of the upper cylinder 110 and is inserted into the lower opening of the inner cylinder 120 and supported in a state hanging on the lower edge of the inner cylinder 120. It receives oil while grilling meat on the grilling plate (140), and water is filled inside for convenient cleaning.

The water pan 130 is preferably used by filling approximately 2/3 of the annular upper open cylinder surrounding the pedestal 111 with water.

The baking plate 140 is inserted into the upper opening of the water pan 130 and supported while hanging on the upper edge of the water pan 130. The central portion protrudes upward and forms an inclined surface from the center toward the edge, and is located at the edge of the inclined surface. Oil leak holes 141 are drilled.

In an embodiment of the present invention, meat may be grilled using a normal mesh-shaped grill instead of the above-mentioned grilling plate 140.

The windbreak cover 150 is supported while hanging on the upper opening of the inner cylinder 120 to block wind blowing from the outside (e.g., air conditioner wind) and prevents oil from splashing out when grilling meat on the grill 140. and the upper opening is covered by a lid (151).

The lower cylinder 160 is an upper open cylinder and is coupled to communicate with the upper cylinder 110, which is supported in a hanging state by being inserted into the upper part, and has a concave shape through the oil receiver inlet 161 on one side. 162) and the lower part is supported by the base 163.

The lower cylinder 160 may be screwed to the upper cylinder 110 while supporting the upper cylinder 110.

The grease trap 162 is made of aluminum and subtracts the high-frequency current component of the ring solenoid 180 so that the heat generated when the ring solenoid 180 generates a high-frequency current is not transferred to the upper cylinder 110. And the inner bottom is filled with water for convenient cleaning of the oil pan 170 at a water level that does not exceed the lower stopping protrusion 161a of the oil pan inlet 161.

The grease pan 170 is a cylinder with an open top, and can be inserted into or removed from the grease pan storage unit 162 in a drawer manner. The grease pan 170 can be accommodated and supported in the grease pan storage unit 162 to prepare meat on the grilling plate 140. When baking, oil that flows out through the ventilation holes 121 of the inner cylinder 120 and freely falls inside the inner cylinder 120 is collected and accommodated.

The ring solenoid 180 is a high-frequency solenoid and is accommodated inside the lower cylinder 160 and disposed below the grease trap 162, and receives a high-current high-frequency pulse through the circuit board (PCB) 190 to generate high-frequency current. Create.

The circuit board (PCB) 190 is accommodated inside the lower cylinder 160 and receives external power (e.g., 220V or 110V, etc.) through a power connection line 191 to which a power cord is connected, and is connected to the ring solenoid 180. A fan is installed that supplies high-current, high-frequency pulses with adjustable pulse width and blows wind for heat dissipation toward the inner cylinder 120.

In an embodiment of the present invention, it is preferable that an insulating plate 192 to insulate between the ring solenoid 180 and the circuit board (PCB) 190 is further installed.

The controller 190a is connected to the circuit board (PCB) 190 with a wire from the outside of the lower cylinder 160 and controls high frequency pulse width for power on/off and heat power control for heating the baking plate 140. Output a signal.

The temperature-controlled electric grill 100 using the high-frequency solenoid according to the present invention configured as described above as a heat source is used as follows.

In the electric grill 100 according to the present invention, the upper cylinder 110 is supported in a hanging state by being inserted into the upper part of the lower cylinder 160 and is coupled (e.g., screwed) to communicate with the lower cylinder 160. do.

Before grilling meat, the user first inserts the inner cylinder 120 into the upper opening of the upper cylinder 110 and supports it in a state hanging on the edge of the upper cylinder 110.

Subsequently, the user inserts the water pan 130 into the lower opening of the inner cylinder 120, supports it while hanging on the lower edge of the inner cylinder 120, and then adds oil while grilling meat on the grilling plate 140. For convenient cleaning, water is filled inside the inner cylinder 120. At this time, it is preferable to fill the inside of the annular upper open cylinder surrounding the pedestal 111 of the water pan 130 with approximately 2/3 of water.

In this way, after the water pan 130 is filled with water, the user inserts the baking plate 140 into the upper opening of the water pan 130 and supports it while hanging on the upper edge of the water pan 130.

In this way, after the baking plate 140 is hung and supported on the upper part of the water pan 130, the user hangs the windproof cover 150 with the lid 151 removed in the upper opening of the inner cylinder 120. It is supported to block wind blowing from the outside (e.g., air conditioner wind) and prevents oil from splashing out when grilling meat on the grill 140.

For reference, the lid 151 is preferably removed from the windbreak cover 150 while grilling meat, and the windbreak cover 150 is removed while storing meat without grilling it with the electric grill 100 according to the present invention. Cover.

In a state where the windbreak cover 150 is supported by hanging on the upper opening of the inner cylinder 120, the user inserts the oil pan 170 into a concave shape through the oil pan inlet 161 of the lower cylinder 160. It is pushed into the formed oil pan receiving part 162.

At this time, before pushing the oil pan 170 into the oil pan storage unit 162, the user first lowers the oil pan 170 to a water level that does not exceed the lower locking protrusion 161a of the oil pan inlet 161. It is advisable to fill it with water for convenient cleaning.

As described above, once the baking plate 140 is supported by hanging on the upper part of the drip pan 130 and the oil pan 170 is accommodated in the oil pan storage portion 162, from then on, the user can use the controller 190a. is operated to output a power-on signal for heating the baking plate 140 and a high-frequency pulse width control signal for controlling the heating power.

The high-frequency pulse width control signal is a signal that accurately controls the temperature of the roasting plate 140 to the optimal temperature (e.g., 175°C, etc.) to prevent meat from sticking, and the optimal temperature is the electric grill 100 according to the present invention. It is preferable to set in advance according to the size, thickness, material, etc. of the baking plate 40 used.

When the high-frequency pulse width control signal is output, the circuit board (PCB) 190, which receives external power through the power connection line 191, supplies a high-current high-frequency pulse with adjustable pulse width to the ring solenoid 180 and the internal A fan that blows heat dissipation air toward the cylinder 120 is operated.

Accordingly, the ring solenoid 180 generates a high-frequency current and transmits it to the tangential copper piece 113 through the connection line 181, and the tangential copper piece 113 transmits the high-frequency current generated by the ring solenoid 180 to the tangential copper piece 113. The baking plate 140 is heated by transmitting the heat to the heating wire 112a disposed on the insulating ceramic sheet 112.

At this time, the baking plate 140 is accurately heated to the optimal temperature (e.g., 175°C, etc.) to prevent the meat from sticking, and by operating the controller 190a according to the user's needs, the optimal temperature (e.g., 175°C, etc.) The baking plate 140 may be heated to a temperature below . In addition, if the heating wire 112a is heated by supplying high-frequency current to the heating wire 112a, it is safe because a voltage signal that may pose a risk of electric shock is not input.

Meanwhile, the water pan 130 can be conveniently cleaned with water pre-filled inside.

In addition, when grilling meat on the roasting plate 140, the oil pan 170 collects the oil that flows out through the ventilation holes 121 of the inner cylinder 120 and freely falls inside the inner cylinder 120. The oil pan 170 can be conveniently cleaned by filling the oil pan 170 with water at a level that does not exceed the lower stopper 161a of the oil pan inlet 161.

In particular, the grease trap 162 is made of aluminum so that the heat generated when the ring solenoid 180 generates the high frequency current is not transferred to the upper cylinder 110 so that the high frequency current component of the ring solenoid 180 is not transmitted. Subtract .

As can be seen from the above, according to the present invention, the high-frequency current generated by the ring solenoid 180 can be adjusted using a large-current high-frequency pulse, so a transformer that supplies current to the electric heating tube for heating the baking plate of the existing electric grill. Compared to the case of using a (or transformer circuit), heating efficiency can be easily increased while forming a simple heat source structure that is not subject to relatively structural restrictions (e.g., restrictions on increasing the size of the transformer).

In addition, when the heating wire 112a is heated by supplying a high-frequency current to the heating wire 112a according to the present invention, it is safe because a voltage signal that may pose a risk of electric shock is not input.

In addition, according to the present invention, since the high-current high-frequency pulse width can be adjusted, the temperature of the baking plate 140 can be adjusted to the optimal temperature (e.g., 175°C, etc.) to prevent meat from sticking without a temperature sensor in close contact with the bottom of the baking plate with a complex structure. ) can be accurately controlled.

In addition, according to the present invention, there is no need to use the electric heating tube, transformer (or transformer circuit), and temperature sensor installed in a complicated structure, so there is an advantage of lower failure rate and improved convenience of use.

100: Temperature-controlled electric grill using a high-frequency solenoid as a heat source
110: upper body 111: stand
112: insulating ceramic sheet 112a: heating wire
113: Tangent east
120: Inner cylinder 121: Ventilation hole
130: Water pan
140: Baking plate 141: Oil drain hole
150: Windbreak cover 151: Lid
160: Lower body 161: Oil pan inlet
161a: Locking protrusion 161: Oil pan storage unit
163: Base
170: Oil pan
180: Ring solenoid
190: Circuit board (PCB) 191: Power connection line
190a: Controller

Claims (5)

It is a cylinder with upper and lower openings, and the lower part is supported in a hanging state by being inserted into the lower cylinder 160. An insulating ceramic sheet 112 is supported on the upper surface of a stand 111 protruding from the center of the lower part, and a heater disposed on the insulating ceramic sheet 112. an upper cylinder 110 in which a line 112a is heated by a high-frequency current supplied through a tangential copper piece 113 fixed to the lower portion around the pedestal 111 to heat the baking plate 140;
It is a top-and-bottom open cylinder that forms the inclined side of the upper and lower cylinders, is inserted into the upper opening of the upper cylinder 110, is supported while hanging on the edge of the upper cylinder 110, and is placed on the circuit board (PCB) 190 along the inclined side. An inner cylinder 120 in which ventilation holes 121 are formed to pass the heat dissipating wind blown by the disposed fan as it rotates;
It is an annular upper open cylinder surrounding the support 111 of the upper cylinder 110, is inserted into the lower opening of the inner cylinder 120, is supported while hanging on the lower edge of the inner cylinder 120, and is connected to the baking plate 140. A water pan (130) that receives oil while grilling meat and is filled with water for convenient cleaning;
It is inserted into the upper opening of the water pan 130 and supported while hanging on the upper edge of the water pan 130, and the central part protrudes upward and forms an inclined surface from the center toward the edge, and an oil outlet hole 141 is formed at the edge of the inclined surface. A perforated baking plate (140);
It is supported in the upper opening of the inner cylinder 120 to prevent wind blowing from the outside, prevents oil from splashing out when grilling meat on the grilling plate 140, and the upper opening is covered by the lid 151. is a windshield (150);
It is an upper open cylinder and is coupled to communicate with the upper cylinder 110 that is supported by being inserted into the upper part and includes an oil pan receiving portion 162 formed in a concave shape through an oil pan inlet 161 on one side, and the lower part is A lower body (160) supported by an underlay (163);
It is a cylinder with an open top, and can be inserted into or removed from the oil pan storage unit 162 in a drawer manner. When grilling meat on the roasting plate 140 while being accommodated and supported in the grease pan storage unit 162, the inner cylinder 120 ) an oil pan (170) that collects and accommodates oil that flows out through the ventilation holes (121) and freely falls inside the inner cylinder (120);
A ring solenoid (180) that is a high-frequency solenoid and is accommodated inside the lower cylinder (160) and disposed below the oil pan housing (162) and generates a high-frequency current by receiving a high-current high-frequency pulse through the circuit board (PCB) (190). ;
It is housed inside the lower cylinder 160, receives external power through the power connection line 191, supplies a high-current high-frequency pulse whose pulse width is adjustable to the ring solenoid 180, and heat radiates toward the inner cylinder 120. A circuit board (PCB) (190) on which a fan blowing air is installed; and
A controller ( 190a);
A temperature-controlled electric appliance that uses a high-frequency solenoid as a heat source, comprising: The method of claim 1, wherein the tangential copper piece (113) is screwed and fixed to the lower part around the pedestal (111), and the screwed part is covered by a waterproof cover (113a) to prevent oil or water from entering the gap. A temperature-controlled electric appliance that uses a high-frequency solenoid as a heat source. The heat source according to claim 1, wherein the tangential copper piece (113) receives the high frequency current generated by the ring solenoid (180) through a connection line (181) and transfers it to the heating wire (112a). A temperature-controlled electric appliance used for. The ring solenoid (180) according to claim 1, wherein the grease trap receiving part (162) is made of aluminum so that heat generated when the ring solenoid (180) generates a high-frequency current is not transferred to the upper cylinder (110). High frequency, characterized in that the high frequency current component is subtracted and the inner bottom is filled with water for convenient cleaning of the oil pan (170) at a water level that does not exceed the lower stopper (161a) of the oil pan inlet (161). A temperature-controlled electric appliance that uses a solenoid as a heat source. The temperature-controlled electric appliance according to claim 1, wherein an insulating plate (192) is further installed to insulate between the ring solenoid (180) and the circuit board (PCB) (190).