KR101535485B1 - Oven - Google Patents

Abstract

The present invention relates to an oven comprising an oven body, an injection nozzle provided in the oven body so as to be movable between a jetting position where the fluid is jetted and a jetting position where it is drawn out to the outside of the cooking chamber, And a fluid supply part for supplying the fluid. Thus, heat loss through the nozzle during cooking can be prevented, and the cooking chamber can be easily cleaned using hot water or steam.

Oven, cooking chamber, jet nozzle, jet position, draw position

Description

Oven {OVEN}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oven, and more particularly, to an oven that can easily clean a cooking chamber using a high-temperature fluid.

As is well known, an oven is a kind of cooking utensil which cooks food by putting food into the closed cooking chamber and heating the inside of the oven.

The oven includes a cabinet forming an outer appearance, a housing disposed inside the cabinet to form a cooking chamber, and a door opening / closing a front opening of the cooking chamber.

A heating means is provided inside the housing. As the heating means, a gas or an electric heater is used. The electric heater is provided with an upper heater disposed at an inner ceiling of the housing according to its arrangement position, and a lower heater disposed at a bottom of the housing. In addition, the heating means may include a convection fan and a convection heater for heating while circulating the air inside the cooking chamber.

However, in such a conventional oven, when food containing meat or meat is cooked, oil or fat such as fat or oil from the food is floated on the inner surface of the cooking chamber and then attached to the wall of the cooking chamber, The inner wall is contaminated. In this way, the oil adhered (adhered) to the wall surface of the cooking chamber becomes so-called "polymerization" (polymerization) and becomes firmly fixed, making cleaning (removal) difficult.

When the contaminants such as oil are adhered to the wall surface of the cooking chamber, a pyrolysis method called pyrolysis in which the inside of the cooking chamber is heated by a heating means and the internal temperature is maintained at a high temperature for a long time to burn and remove contaminants . The pyrolysis method requires a long time and power because the inside of the cooking chamber is maintained at a high temperature (for example, 420 DEG C or more) for a long time.

In addition, in some cases, a plurality of pad-shaped catalysts having a smaller size than the inner wall of the cooking chamber are further disposed on the inner wall of the cooking chamber, but contaminants still adhere to the region where the catalyst is not attached. Step differences are generated and these boundary areas are difficult to clean due to difficulty in accessibility.

Accordingly, it is an object of the present invention to provide an oven capable of preventing heat loss through a nozzle during cooking.

Another object of the present invention is to provide an oven in which the configuration is simple and the cooking chamber can be cleaned using hot water.

Another object of the present invention is to provide an oven capable of cleaning the cooking chamber using steam and reducing power consumption when steam is generated.

In order to achieve the above-described object, the present invention provides an oven main body including a cooking chamber; A spray nozzle disposed in the oven body so as to be movable between a spray position for spraying fluid and a draw position for being drawn out to the outside of the cooking chamber; And a fluid supply part for supplying fluid to the injection nozzle.

The apparatus may further include an injection nozzle driving unit for driving the injection nozzle such that the injection nozzle is positioned at either the injection position or the drawing position.

The cooking chamber may further include a cut-off member formed with a blow-out hole for allowing the blow-out nozzle to be inserted into and out of the cooking chamber, and intercepting the blow-out hole at the blow-in position and the cut-

The fluid supply unit includes: a sump formed at a bottom of the cooking chamber; A flow path connecting the sump and the injection nozzle; And a pump installed in the flow path and pumping the sump water toward the injection nozzle.

The fluid supply unit may further include a heating unit for heating water.

A drainage channel may be formed in the sump.

The sump may be provided with a filter for filtering foreign substances.

Wherein the injection nozzle comprises: a fixing part having a flow path formed therein; And a rotation part rotatably coupled to the fixing part and having a jet hole formed therein.

The injection holes may be formed in a plurality of different injection angles.

The rotating portion may be configured to be rotated by jetting fluid.

The fluid supply unit may include: a steam generator for generating steam to supply the steam to the spray nozzle; And a water supply unit for supplying water to the steam generator.

Wherein the fluid supply portion includes: a storage container having an inlet and a steam outlet formed therein and defining a receiving space therein; A partitioning member for vertically communicating the inside of the storage container; And a heating element disposed below the partition member for heating the water.

The storage container may be detachably attached to the oven main body.

According to another aspect of the present invention, there is provided an oven main body including a cooking chamber formed therein; A spray nozzle disposed in the oven main body to be movable between a spray position for spraying fluid while rotating and a drawn position for being drawn out to the outside of the cooking chamber; And a fluid supply part for supplying fluid to the injection nozzle.

As described above, according to the present invention, it is possible to prevent the heat inside the cooking chamber from flowing out to the outside through the nozzle during cooking, by providing the nozzle to the cooking chamber.

Further, according to the present invention, since the sump, the nozzle, the flow path connecting the sump and the nozzle, and the pump provided in the flow path are provided, the inside of the cooking chamber can be cleaned with a simple structure.

Further, according to the present invention, contaminants inside the cooking chamber can be easily removed using steam.

Further, according to the present invention, the steam can be quickly generated with a small energy by disposing the heating section in a partitioned area of the inside of the water storage section. As a result, the power consumption can be reduced, and the cooking chamber can be cleaned quickly and easily.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment]

2 is a side cross-sectional view of the oven of Fig. 1, Fig. 3 is an enlarged view of the spray nozzle region of Fig. 2, Fig. 4 is a cross- Fig. 5 is an enlarged view of the solenoid of Fig. 2, Fig. 6 is a plan sectional view of the nozzle of Fig. 4, and Fig. 7 is a control block diagram of the oven of Fig. 1 and 2, the oven includes an oven main body 110 having a cooking chamber 122 formed therein; A spray nozzle 140 disposed in the oven main body 110 so as to be movable between a spray position for spraying the fluid and a draw position for being drawn out to the outside of the cooking chamber 122; And a fluid supply unit 210 for supplying fluid to the injection nozzle 140.

The oven main body 110 includes a cabinet 111 forming an outer appearance, a housing 121 disposed inside the cabinet 111 to form a cooking chamber 122, And a door 130 for opening and closing. The door 130 is rotatably coupled along the vertical direction of the cabinet 111. Here, the door 130 may be configured to be rotated in a lateral direction of the cabinet 111.

A control panel 115 having a plurality of operation switches (buttons) 116 and a display unit 117 for outputting predetermined time information is provided on the front surface of the cabinet 111.

The housing 121 has a rectangular parallelepiped shape and has a front opening.

The cooking chamber 122 is provided with a heating means 126 for heating the food. The heating means 126 may comprise an electric heater. The heating means 126 may comprise a lower heater 127 and / or an upper heater 128 disposed on the bottom and / or top of the cooking chamber 122.

A convection fan 131 is provided in the rear area of the cooking chamber 122 to circulate the air in the cooking chamber 122 and a convection fan 131 is provided on one side of the convection fan 131, A heater 133 is provided. A cover 135 having a suction port 136 and a discharge port 137 is disposed outside the convection fan 131 and the convection heater 133. Here, the convection fan 131 may be installed between the rear wall of the housing 121 and the rear wall of the cabinet 111.

The cooking chamber 122 is provided with a spray nozzle 140 and a fluid supply unit 210 for spraying the fluid into the cooking chamber 122.

The injection nozzle 140 is disposed inside the cooking chamber 122 so as to be movable between a jetting position for jetting fluid and a fetching position for being drawn out to the outside of the cooking chamber 122. The injection nozzle 140 is disposed inside the cooking chamber 122 to prevent the heat of the cooking chamber 122 from being discharged to the outside through the injection nozzle 140 during cooking.

In the upper region of the cooking chamber 122, an outlet hole 124 is formed so that the injection nozzle 140 can be selectively moved to the injection position and the drawing position.

A fluid supply part 210 is formed in the cooking chamber 122 to supply the fluid to the injection nozzle 140. The fluid supply unit 210 includes a sump 211 formed at the bottom of the cooking chamber 122, a flow path 217 connecting the sump 211 and the injection nozzle, And a pump 219 installed in the sump 211 to pump the water of the sump 211 toward the injection nozzle 140.

The sump 211 is formed at the bottom of the cooking chamber 122 so as to be able to receive water therein and a stem 213 is provided at the inlet of the sump 211 to allow contaminants to be caught therein. The sump 211 may be provided with a heater 215 so as to heat water therein. Thus, the water can be heated during cleaning, and hot water or hot water can be sprayed into the cooking chamber 122 to easily remove contaminants. Also, the steam may be generated by heating the water with the heater 215 in a state in which water is received in the sump 211 when cooking and the pump 219 is not driven, thereby supplying steam to the food.

One end of a flow path 217 is connected to one side of the sump 211 and the other end of the flow path 217 is connected to the injection nozzle 140. Here, part or all of the flow path 217 is formed of a flexible tube (corrugated tube). As a result, the injection nozzle 140 can be moved freely.

The flow path 217 is provided with a pump 219 for pumping the water of the sump 211 to the injection nozzle 140. By repeating the circulation of the water collected in the sump 211, the cooking chamber 122 can be cleaned with a small amount of water. Here, the sump 211 may further include a drainage passage (not shown) and a drainage valve (not shown) to discharge the water collected in the sump 211 to the outside. The sump 211 may further include a water supply channel (not shown) and a water supply valve (not shown) to supply water. This enables automatic control of water supply and drainage.

As shown in FIG. 3, the injection nozzle 140 includes a fixed portion 141 having a flow path therein to allow fluid to flow therein, a rotary portion (not shown) rotatably coupled to the fixed portion 141, 151). An outlet 142 is formed in the fixing part 141 so that water can be flowed along the inside of the fixing part 141. Around the outlet 142 is provided a rotation part 151 . On both sides of the outlet 142, a support 144 protruding outward to rotatably support the rotation part 151 is formed.

The rotation part 151 is formed with a spray hole 153 for spraying fluid to the outside. The injection holes 153 are vertically spaced apart from each other so as to inject fluid at different positions along the vertical direction. As a result, the spray angle (range) of the fluid is increased, and the fluid can be uniformly sprayed to the inner wall of the cooking chamber 122. In addition, the spray holes 153 may have different spray angles. That is, the spray hole 153 formed on the upper side of the spray hole 153 is formed to spray fluid toward the ceiling and the side wall of the cooking chamber 122, and the lower spray hole 153 (153) may be formed so as to inject fluid toward the side wall and bottom of the cooking chamber (122). 6, the spray nozzles 140 are formed so that the spray holes 153 spray the fluid to the rear in the rotational direction, respectively. Whereby the injection nozzle 140 is rotated by the injection of the fluid. Here, the number of spray holes 153 and the spray angle can be appropriately adjusted.

The fixing portion 141 is provided with a pair of blocking members 161 so as to block the extraction holes 124 from the injection position and the extraction position of the injection nozzle 140, respectively. Each of the blocking members 161 includes a shielding plate 163 corresponding to the shape of the drawing hole 124 and having a larger size than the drawing hole 124, And a sealing member 165 interposed between the ceilings of the upper and lower plates 122, respectively.

A spray nozzle driving unit 170 for driving the spray nozzle 140 between the spray position and the take-out position is provided on one side of the spray nozzle 140. The injection nozzle driving unit 170 includes a rod 171 having one side connected to the injection nozzle 140 and a driving unit for moving the rod 171 corresponding to the injection position and the drawing position. One end of the rod 171 is fixed to the fixed portion 141 of the injection nozzle 140. The rod 171 has an inverted L shape. The rod 171 is slidably supported by the sliding support portion 175. A driving unit is connected to the other end of the rod 171. The driving unit is implemented with a solenoid 180. Here, the driving unit may include a thermal actuator (not shown) or an electric motor (not shown). When the drive unit is constituted by a motor, a pinion gear is coupled to the motor, and the rod 171 is engaged with the pinion gear to form a rack gear that moves when the pinion gear rotates.

5, the solenoid 180 includes a frame 181 forming a magnetic path, a bobbin 183 disposed inside the frame 181, a bobbin 183 disposed inside the bobbin 183, A fixed core 187 fixed to the inside of the bobbin 183, a movable core 189 movably arranged inside the bobbin 183, And a spring 193 for applying an elastic force to move the movable core 189 apart from the fixed core 187. The movable core 189 is connected to the movable core 189 and the other end is connected to the rod 171, . Accordingly, when power is applied to the coil 185, a magnetic force is generated, and the movable core 189 is moved toward the fixed core 187 in a direction in which the magnetic resistance decreases. At this time, the spring 193 is compressed to accumulate the elastic force, and when the power is cut off to the coil 185, the movable core 189 is separated from the fixed core 187 by the accumulated elastic force, do.

7, the control unit 260, which is implemented as a microprocessor having a control program, is provided with a mode selection unit 262 for selecting any one of a plurality of operation modes including a cleaning mode, Respectively. The controller 260 controls the pump 219 and the heater (not shown) so that fluid, that is, water (water) can be injected into the cooking chamber 122 when the mode selection unit 262 selects the cleaning mode, 215 and an injection nozzle driving unit 170 are controllably connected.

With this configuration, an appropriate amount of water is injected into the sump 211 before cleaning the cooking chamber 122. When the mode selection unit 262 selects the cleaning mode, the controller 260 controls the injection nozzle driver 170, that is, the solenoid 180, to move the injection nozzle 140 to the injection position .

When power is applied to the coil 185 of the solenoid, the movable core 189 is moved in a direction in which the magnetoresistance decreases, that is, in a direction approaching the fixed core 187. As a result, the rod 171 is moved downward so that the injection nozzle 140 is moved to the injection position as shown in FIG. At this time, the drawing-out hole 124 is blocked by the blocking member 161 disposed on the upper side of the injection nozzle 140.

The control unit 260 drives the pump 219 so that water is injected into the cooking chamber 122. The control unit 260 may operate the heater 215 to heat the water in the sump 211. Accordingly, contaminants inside the cooking chamber 122 can be more easily removed. When the pump 219 is driven, the water of the sump 211 moves along the flow path 217 and is injected through the injection nozzle 140. The spray nozzle 140 is rotated by spraying water so that water is uniformly sprayed on each inner wall of the cooking chamber 122.

[Second Embodiment]

Fig. 8 is a perspective view of an oven according to a second embodiment of the present invention, Fig. 9 is a side sectional view of the oven of Fig. 8, Fig. 10 is a side sectional view of the fluid supply unit of Fig. Fig. 12 is a control block diagram of the oven of Fig. 8; Fig. The same reference numerals are used for the same or equivalent components as those of the above-described embodiment, and a detailed description thereof will be omitted. 8 and 9, the oven includes an oven main body 110 having a cooking chamber 122 formed therein; A spray nozzle 140 disposed in the oven main body 110 so as to be movable between a spray position for spraying the fluid and a draw position for being drawn out to the outside of the cooking chamber 122; And a fluid supply unit 230 for supplying fluid to the injection nozzle 140.

The oven main body 110 includes a cabinet 111 forming an outer appearance, a housing 121 disposed inside the cabinet 111 to form a cooking chamber 122, And a door 130 for opening and closing.

A control panel 115 having a plurality of operation switches 116 and a display unit 117 for outputting predetermined time information is provided on the front surface of the cabinet 111. [

The housing 121 has a rectangular parallelepiped shape and has a front surface opened. The cooking chamber 122 is provided with a heating means 126 (e.g., a lower heater 127 and / or an upper heater 128) ).

A convection fan 131 and a convection heater 133 are provided in the rear area of the cooking chamber 122 to circulate and heat the air in the cooking chamber 122.

The cooking chamber 122 is provided with a spray nozzle 140 and a fluid supply unit 230 for spraying fluid into the cooking chamber 122.

The injection nozzle 140 is disposed inside the cooking chamber 122 so as to be movable between a jetting position for jetting fluid and a fetching position for being drawn out to the outside of the cooking chamber 122.

In the upper region of the cooking chamber 122, an outlet hole 124 is formed so that the injection nozzle 140 can be moved to the injection position and the drawing position. Upper and lower sides of the injection nozzle 140 are respectively provided with a blocking member 161 so as to block the drawing-out hole 124 when the injection nozzle 140 is disposed at the injection position and the drawing-out position, respectively. That is, the outflow hole 124 is blocked by the upper blocking member 161 at the ejection position, and the blocking member 161 at the lower side at the withdrawing position blocks the withdrawing hole 124. The injection nozzle 140 may include a fixing part 141 having a flow path formed therein and a rotation part 151 rotated with respect to the fixing part 141. That is, the rotary part 151 may be formed with a spray hole 153 to be rotated by the spraying force of the steam. A spray nozzle driving unit 170 is provided on one side of the spray nozzle 140 to drive the spray nozzle 140. The spray nozzle driving unit 170 is formed of the solenoid described above.

A fluid supply unit 230 is formed on one side of the cooking chamber 122 to supply fluid, that is, steam, to the injection nozzle 140. The fluid supply part 230 is connected to the injection nozzle 140 by a steam pipe 225 in which a flow path is formed to allow steam to flow therein. Here, at least a portion of the steam pipe 225 is formed of a fliexible pipe (corrugated pipe).

The fluid supply unit 230 includes a storage container 231 having an inlet 233 and a steam outlet formed therein and an accommodation space therein and a partition member 231 for partitioning the interior of the storage container 231 into upper and lower portions 241), and a heating element disposed below the partition member (241) for heating water. The fluid supply unit 230 includes a steam generator for generating steam and a water tank for supplying water. As a result, the configuration becomes compact, and the size of the cabinet 111 can be reduced. The fluid supply unit 230 includes a steam generator (not shown) that receives water to generate steam, and a water supply unit 230 that is formed separately from the steam generator and connected to the steam generator to supply water to the steam generator. And may be configured to have a tank (not shown).

As shown in FIGS. 10 and 11, the storage container 231 has a substantially rectangular parallelepiped shape, and an injection port 233 is formed in the upper front region to inject water therein. The injection port 233 is formed with an injection port stopper 235. A steam outlet 237 is formed in a rear upper region of the storage container 231 to discharge steam generated therein. An overflow preventing portion 236 is formed in the inlet region of the steam outlet 237 to prevent water from flowing into the steam outlet 237. The overflow preventing portion 236 is formed at a predetermined distance from the inlet of the steam outlet 237. Thus, water can be prevented from flowing into the steam outlet 237 even if the internal surface of the storage container 231 is squeezed by the action of the external force and / or the heating of the heater 251. Thus, clogging of the steam outlet 237 by water can be prevented, and the steam can be smoothly discharged.

Inside the storage container 231, a partition member 241 is formed to partition the internal space. That is, the partition member 241 vertically divides the inner space of the storage container 231 so that the upper space 232a receives water and the lower space 232b moves from the upper space 232a Water is heated by the heating element to be steamed and discharged into the upper space 232a. As a result, the steam can be rapidly generated with a relatively small power.

The partition member 241 is formed as a pair having an "L" shape having a horizontal portion 243 and a vertical portion 245, respectively. Each of the horizontal portions 243 of the two partition members 241 is spaced apart from the bottom of the storage container 231 and each of the vertical portions 245 of the two partition members 241 is formed so as to allow steam to flow And are spaced apart from each other by a predetermined distance. A communication hole 244 is formed in the horizontal portion 243 of the two partition members 241 so that the water in the upper space 232a can be moved to the lower space 232b. In the lower space 232b, a heating element, that is, an electric heater 251, is installed so as to heat the water inside. When the water in the lower space is vaporized by the heater 251 to be discharged into the upper space 232a, the water in the upper space 232a flows through the communication hole 244.

A housing part 220 is formed on one side of the housing 121 so that the fluid supply part 230 can be taken out along the front and back direction. A steam outlet connection part 222 and a heater connection part 224 are formed in the rear area of the storage part 220 so that the fluid supply part 230 can be detachably connected.

The steam outlet connection part 222 is formed such that the steam outlet 237 can be connected to the steam outlet connection part 222. The steam outlet connection part 222 has one end connected to the other end of the flow path connected to the injection nozzle 140. The heater connection part 224 is formed to be connected to the terminal 253 of the heater 251 and the heater connection part 224 is formed to be connected to an external power source so that power can be connected to the heater 251 . Here, a branch pipe (not shown) may be formed in the steam pipe 225 so as to supply steam to the cooking chamber 122 without passing through the spray nozzle 140. Further, the branch pipe and the steam pipe 225 may be connected via a three-way valve (three-way valve) (not shown). That is, in the case of cooking, the three-way valve blocks the steam pipe 225 of the injection nozzle 140 and supplies the steam to the cooking chamber 122 through the branch pipe, By opening the steam pipe 225, steam is supplied to the cooking chamber 122 through the injection nozzle 140.

12, the controller 260, which is implemented in the form of a microprocessor having a control program, is provided with a mode selection unit 262 for selecting any one of a plurality of operation modes including a cleaning mode, Respectively. When the mode is selected by the mode selection unit 262, the controller 260 controls the heater 251 of the fluid supply unit 230 and the heater 251 of the fluid supply unit 230 so that fluid, that is, And a spray nozzle driving unit 170 are respectively controllably connected.

According to this configuration, when the user wants to clean the cooking chamber 122, the fluid supply unit 230 is drawn out and water is injected into the fluid supply unit 230. When the fluid supply part 230 is inserted into the storage part 220, the steam discharge port 237 of the fluid supply part 230 is connected to the steam discharge port connection part 222, and the terminal of the heater 251 253 are connected to the heater connection portion 224, respectively. As a result, the heater 251 can be supplied with power and the vapor of the fluid supply unit 230 can be supplied to the injection nozzle 140.

When the cleaning mode is selected by the mode selection unit 262, the controller 260 applies power to the spray nozzle driver 170, that is, the solenoid 180 so that the spray nozzle 140 To the injection position. When power is applied to the coil 185 of the solenoid 180, the movable core 189 is moved in a direction in which the magnetic resistance decreases, that is, in a direction approaching the fixed core 187. As a result, the rod 171 is moved downward so that the injection nozzle 140 is moved to the injection position. At this time, the outflow hole 124 is blocked by the blocking member 161 disposed on the upper side of the injection nozzle 140.

When the cleaning mode is selected, the controller 260 controls the heater 251 of the fluid supply unit 230 to be powered. When power is applied to the heater 251, water in the lower space 232b of the fluid supply unit 230 is heated to generate steam, and the generated steam flows along the gap between the partition members 241, Lt; / RTI > The steam moved to the upper space 232a is discharged through the steam outlet 237 and is moved along the steam pipe 225. The moved steam is injected into the interior of the cooking chamber 122 through the injection nozzle 140. Thus, contaminants inside the cooking chamber 122 can be quickly and easily removed.

1 is a perspective view of an oven according to a first embodiment of the present invention,

Fig. 2 is a side cross-sectional view of the oven of Fig. 1,

Fig. 3 is an enlarged view of the injection nozzle region of Fig. 2,

FIG. 4 is a view for explaining the operation of the nozzle driving unit of FIG. 3,

Figure 5 is an enlarged view of the solenoid of Figure 2,

FIG. 6 is a plan view of the nozzle of FIG. 4,

Figure 7 is a control block diagram of the oven of Figure 1,

8 is a perspective view of an oven according to a second embodiment of the present invention,

9 is a side sectional view of the oven of Fig. 8,

Fig. 10 is a side sectional view of the fluid supply portion of Fig. 9,

11 is a sectional view taken along the line XI-XI in Fig. 10,

12 is a control block diagram of the oven of Fig.

Description of the Related Art [0002]

110: oven body 111: cabinet

121: housing 122: cooking chamber

124: drawer 130: door

131: Convection fan 133: Convection heater

140: injection nozzle 141:

142: outlet 144:

151: rotation part 153:

161: blocking member 163: blocking plate

165: sealing member 170: spray nozzle driving unit

171: Load 180: Solenoid

210: fluid supply unit 211: sump

213: Drawbar 215: Heater

217: Euro 219: Pump

260: control unit 262: mode selection unit

Claims (14)

An oven main body in which a cooking chamber is formed; A spray nozzle disposed in the oven body so as to be movable between a spray position for spraying fluid and a draw position for being drawn out to the outside of the cooking chamber; And a fluid supply unit for supplying fluid to the injection nozzle, The cooking chamber is formed with a draw-out hole for allowing the spray nozzle to enter and exit, And a blocking member interlocked with the ejection nozzles to block the ejection holes at the ejection position and the ejection position, respectively. The method according to claim 1, Further comprising an injection nozzle driving unit for driving the injection nozzle such that the injection nozzle is located at one of the injection position and the drawing position. The method according to claim 1, Wherein the blocking member is provided on the upper side and the lower side of the injection nozzle, Wherein when the injection nozzle is at the drawing-out position, the drawing-out hole is blocked by a blocking member below the injection nozzle, Wherein the outlet hole is blocked by a blocking member on the upper side of the injection nozzle when the injection nozzle is in the injection position. 4. The method according to any one of claims 1 to 3, The fluid supply unit includes: a sump formed at a bottom of the cooking chamber; A flow path connecting the sump and the injection nozzle; And a pump installed in the flow path and pumping the sump water toward the injection nozzle side. 5. The method of claim 4, Wherein the fluid supply part further comprises a heating part for heating water. delete delete 5. The method of claim 4, Wherein the injection nozzle comprises: a fixing part having a flow path formed therein; And a rotation part rotatably coupled to the fixing part and having a jet hole formed therein. delete delete 4. The method according to any one of claims 1 to 3, The fluid supply unit may include: a steam generator for generating steam to supply the steam to the spray nozzle; And a water supply unit for supplying water to the steam generator. 4. The method according to any one of claims 1 to 3, Wherein the fluid supply portion includes: a storage container having an inlet and a steam outlet formed therein and defining a receiving space therein; A partitioning member for vertically communicating the inside of the storage container; And a heating element disposed below the partition member for heating water. delete An oven main body in which a cooking chamber is formed; A spray nozzle disposed in the oven main body to be movable between a spray position for spraying fluid while rotating and a drawn position for being drawn out to the outside of the cooking chamber; And And a fluid supply unit for supplying fluid to the injection nozzle, The cooking chamber is formed with a draw-out hole for allowing the spray nozzle to enter and exit, And a blocking member interlocked with the ejection nozzles to block the ejection holes at the ejection position and the ejection position, respectively.

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