KR102490846B1 - Steam generating apparatus and cooking device having the same - Google Patents

Abstract

A steam supply device according to an embodiment of the present invention includes a casing made of a casting material in which a steam generating unit having a cylindrical shape extending in the vertical direction is formed; a heater embedded in the case and extending in the longitudinal direction of the steam generator at a point spaced apart from the steam generator in both directions; a thermistor mounted inside the case to prevent overheating of the heater; and a steam supply passage having one end connected to an upper end of the steam generator and the other end connected to an inside of a cooking chamber of a cooking appliance.

Description

Steam generating apparatus and cooking device having the same {Steam generating apparatus and cooking device having the same}

The present invention relates to a steam supply device and a cooking appliance having the same.

A cooking device including an oven is a home appliance that cooks food using heat. Recently, a cooking appliance equipped with a steam supply device has been released in order to provide steam to the inside of the cooking chamber to increase the texture of food and minimize the destruction of nutrients contained in the food.

In order to maximize the steam generation efficiency of the steam supply device, the shape of the steam generating unit and the heat transfer pattern according to the position of the heater act as very important factors.

In addition, the water level in the steam generating unit, which is kept constant during the operation of the steam supply device, not only greatly affects the efficiency of steam generation, but also minimizes the discharge water that jumps up during steam generation and secures reliability through temperature control of the steam generating unit. acts as a very important factor.

Korean Patent Publication No. 10-2018-0028643 (March 19, 2018)

An object of the present invention is to provide a cooking appliance capable of maximizing steam generation efficiency by improving and optimizing the shape of a steam supply unit for generating and supplying steam into a cooking chamber.

A steam supply device according to an embodiment of the present invention for achieving the above object includes a cylinder-shaped steam generator including a water supply port formed at a lower end and a discharge port formed at an upper end, and extending in a vertical direction; a water supply passage connecting the water supply pump and the water inlet; a heater extending in the longitudinal direction of the steam generator at a point spaced apart from the steam generator in both sides; a thermistor mounted inside the case to prevent overheating of the heater; a steam supply passage connected to the discharge port and through which the steam generated by the steam generator flows; a housing for collecting condensed water formed by condensing a part of the steam flowing along the steam supply passage; and a recovery passage extending from a lower surface of the housing, wherein the steam supply passage comprises a first passage connecting the discharge port and an upper surface of the housing, and a branch at a point of the first passage. and a second flow path extending into the cooking chamber, and preventing at least a portion of the steam flowing along the steam supply path from being condensed in contact with water supplied to the steam generator through the water supply path. An outlet is directly connected to the water supply inlet, and an outlet of the recovery passage is connected to a point in the water supply passage upstream of the water supply inlet so that condensed water discharged along the recovery passage can be re-supplied to the steam generating unit. characterized by

In addition, the cooking appliance according to an embodiment of the present invention is characterized in that the steam supply device is mounted on the rear surface of the cavity.

A cooking appliance according to an embodiment of the present invention has the following advantages.

First, the steam generator is formed in a vertically extending cylindrical shape, and heaters are installed to extend from both sides of the steam generator in a longitudinal direction of the steam generator, thereby maximizing heat transfer to the steam generator.

Second, since the heater is embedded in the case in which the steam generator is formed and the case is made of a casting type, there is an advantage in that the heat transfer effect is improved.

Third, according to the structure of the steam supply unit according to an embodiment of the present invention, generation of discharged water can be minimized while maximizing steam generation efficiency, and reliability of the steam generator unit is effectively secured.

Fourth, a recovery unit for recovering condensate generated along the steam supply passage is installed outside the steam supply unit and has a structure capable of resupplying discharged water and condensate generated in the steam supply process to the steam generator unit, The size of the tank can be designed compactly, and there is an advantage in that there is no need for a discharge passage for discharging the condensate collected in the recovery unit to the outside of the cooking appliance.

According to this structure, since the water level in the recovery unit corresponds to the water level in the steam generating unit, there is an advantage in that the water level sensor is not directly mounted inside the high-temperature steam generating unit but is mounted in the recovery unit.

Fifth, by installing an electrode type water level sensor that can withstand high temperatures in order to detect the water level in the steam generating unit, the life of the water level sensor can be secured.

Sixth, the electrode type water level sensor is mounted on the upper surface of the recovery unit housing, and the possibility of malfunction and noise generation of the water level sensor can be minimized by separately disposing the common electrode and the operation electrode on both sides of the steam supply passage connected to the housing. There are advantages to being

Seventh, by treating the end of the electrode constituting the water level sensor with Teflon coating, there is an advantage in minimizing malfunction of the sensor.

Eighth, by forming a condensate inflow preventing part in the form of a recess on the upper surface of the recovery unit housing between the steam supply passage and the electrode constituting the water level sensor, it is possible to prevent condensate flowing along the steam supply passage from flowing to the electrode of the water level sensor. There are advantages to being able to

Ninth, a connection passage communicating with the cooking chamber is formed at one point of the steam supply passage connecting the housings of the steam generator and recovery unit, so that the pressure inside the housing of the steam generator and recovery unit is maintained at the same atmospheric pressure during the water supply process. Accordingly, there is an advantage in that the prior art does not require a vent hole for maintaining the inside of the housing of the recovery unit at atmospheric pressure or a tube for reducing pressure, which is essentially required.

1 is a rear perspective view of a cooking appliance according to an embodiment of the present invention;
2 is a left perspective view of a steam supply device according to an embodiment of the present invention;
3 is a right perspective view of the steam supply device;
4 is a side cross-sectional view of a steam supply section taken along line 4-4 in FIG. 2;
5 is a longitudinal sectional view taken along 5-5 in FIG. 2;
6 is a longitudinal sectional view taken along 6-6 in FIG. 2;

Hereinafter, a cooking appliance equipped with a steam supply device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a rear perspective view of a cooking appliance according to an embodiment of the present invention.

Referring to FIG. 1 , a cooking appliance 10 according to an embodiment of the present invention includes a cavity 11 in which a cooking chamber is formed, a door 12 that opens and closes a front opening of the cavity 11, and Connecting the water tank 13 placed on the upper surface of the cavity 11, the steam supply device 20 mounted on the rear surface of the cavity 11, and the water tank 13 and the steam supply device 20 It may include a flow path and a pump module 30 connected to the flow path.

In detail, a heating device for cooking food and a circulation fan for circulating hot air inside the cooking chamber may be installed inside the cavity 11 . And, a control panel including a control panel may be mounted on the upper side of the door 12 .

The water tank 13 may be provided in a drawer type on one upper side of the door and may be provided to be separable from the cavity 11 . Also, the water tank 13 is accommodated in a tank housing so as to be drawn in and out, and the tank housing may be fixed to an upper side of the cavity 11 .

In addition, a water supply port 131 and a drain port 132 may protrude from the rear surface of the tank housing. Also, the passage may be provided in a bendable tube shape.

Further, the pump module 30 includes a water supply pump 31 for supplying water in the water tank 13 to the steam supply device 20 and water remaining in the steam supply device 20 as the water. It may include a drain pump 32 that returns to the tank 13. Since the drain pump 32 functions to return water from the steam supply device 20 to the water tank 13, it can be defined as a recovery pump.

In addition, the flow path includes a water supply flow path 133 connected to the water supply port 131, a drain flow path 134 connected to the drain port 132, and the water supply flow path 133 and the drain flow path 134. may include a common passage 135 connected to a point where they meet.

Also, the water supply pump 31 is mounted on the water supply passage 133 and the drain pump 32 is mounted on the drain passage 134 . Further, ends of the water supply passage and the drainage passage extending from the outlet side of the water supply pump 31 and the drain pump 32 meet at one point, and the common passage 135 extends at the meeting point. And, the outlet end of the common passage 135 is connected to the steam supply device 20 .

According to the passage structure having the above configuration, the water filled in the water tank 13 is supplied with steam along the water supply passage 133 and the common passage 135 by the operation of the water pump 31. supplied to the device 20. After the supply of steam is completed, the water remaining in the steam donger device 20 flows along the common flow path 35 and the drain flow path 134 by the operation of the drain pump 32 to the water tank 13 ) back to

Hereinafter, the configuration and function of the steam supply device 20 according to an embodiment of the present invention will be described in more detail with reference to the drawings.

2 is a left perspective view of a steam supply device according to an embodiment of the present invention, and FIG. 3 is a right perspective view of the steam supply device.

Referring to FIGS. 2 and 3 , the steam supply device 20 according to an embodiment of the present invention includes a steam supply unit 21 for generating and supplying steam, and steam generated from the steam supply unit inside the cavity 11 It may include a steam supply passage 25 leading to the steam supply passage 25 and a recovery unit 26 connected to one end of the steam supply passage 25 to collect condensed water generated during the steam supply process.

In detail, the steam supply unit 21 includes a casting type case 22, a heater 23 for generating steam buried in the case 22, and mounted inside the case 22, so that the case ( 22) may include a thermistor 24 to prevent overheating. Also, the recovery unit 26 may be coupled to a side surface of the steam supply unit 21 by a fastening bracket 29 .

In addition, the case 22 includes a heater embedding part 221 having a substantially hexahedral shape, and a thermistor mounting part 222 protruding from one side of the heater embedding part 221 and having the thermistor 24 mounted therein. and a steam generating unit 223 extending in a cylindrical shape in the middle of the heater embedding unit 221, and a water supply port 224 extending from the lower end of the heater embedding unit 221.

The heater 23 may be a U-shaped seed heater, and both ends of the heater 23 may protrude from an upper surface of the case 22 , specifically, the heater embedding part 221 . And, the steam generator 223 may be formed between both ends of the heater 23 .

In detail, the heater embedment part 221 may have a vertical length longer than a horizontal width and a thickness greater than the diameter of the heater 23 .

In addition, the steam generator 223 may be formed in a hollow cylindrical shape to be filled with steam and water, and the rear end of the steam generator 223 is located at a point spaced apart from the rear end of the heater embedment unit 221. can be located

And, as shown, the inner diameter of the steam generating part 223 is the thickness of the heater embedding part 221 so that the front end of the steam generating part 223 protrudes more from the front surface of the heater embedding part 221. It may be designed to be larger, but is not necessarily limited thereto. In addition, the steam generator 223 may be designed as a cylinder having the same inner diameter or as a truncated cone cylinder that increases from the bottom to the top.

In addition, the upper end of the steam generator 223 may extend a predetermined length from the top surface of the heater embedment part 221 (or case 22), and the upper end of the heater embedment part 221 protrudes from the upper surface of the An upper portion of the steam generator 223 may be defined as a discharge port 225 .

On the other hand, the steam supply passage 25 includes a rising portion 251 inserted into the outer circumferential surface of the discharge port 225 and extending upward, and an extension bent and extending from the upper end of the rising portion 251 ( 252), a descending part 253 bent at an end of the extension part 252 and extending downward, and a cavity connection part 254 extending from a certain point of the descending part 253. Also, the extension part 252 may extend horizontally.

In addition, the cavity connection part 254 may have a smaller diameter than the diameter of the lower part 253 and may be bent in a substantially S-shape. In detail, the cavity connection part 254 may extend horizontally at a certain point of the lower part 253, then bend and extend upward, and then bend again and extend horizontally. Also, an end of the cavity connection part 254 passes through a rear surface of the cavity 11 and communicates with the inside of the cavity 11 . Accordingly, steam flowing along the steam supply passage 25 is supplied into the cavity 11 through the cavity connection part 253 .

Here, since the cylinder-shaped steam generating unit 223 has a small volume, when the water supplied to the steam generating unit 223 is heated, boiling occurs vigorously, especially when a bumping phenomenon occurs, High-temperature water together with steam overflows to the outside of the steam generator 223 .

At this time, it is necessary to properly design the shape of the steam supply passage 25 in order to prevent boiling water from flowing into the cavity 11 .

To this end, the steam supply passage 25 may be designed to be bent in an n-shape so that boiling water does not flow into the cavity 11 and falls due to gravity.

In addition, the cavity connection part 254 is branched from one side of the descending part 253 and extends upward, so that only gas among the liquid and gas on the steam supply passage 25 is supplied into the cavity 11 Let it be.

In addition, it is necessary to ensure that condensed water generated in the process of supplying steam does not flow into the cavity 11 and is recovered into the steam generator 223 . To this end, the recovery part 26 may be mounted at an end of the descending part 253 . A condensed water storage space is formed inside the recovery part 26, and a recovery passage 273 extends from the bottom of the recovery part 26.

An end of the return passage 273 is connected to the common passage 135 connecting the pump module 30 and the water supply port 224 . Accordingly, the condensed water discharged along the return passage 273 is re-supplied to the steam generator 223 together with the water supplied along the common passage 135 .

Meanwhile, an n-shaped flow path connecting the steam supply unit 21 and the housing 27 may be defined as a first flow path, and the cavity connection part 254 branched from the first flow path may be defined as a second flow path. there is.

Hereinafter, cross-sectional structures and internal structures of the steam supply unit 21 and the recovery unit 26 will be described in detail with reference to drawings.

4 is a side cross-sectional view of a steam supply unit taken along 4-4 in FIG. 2, FIG. 5 is a longitudinal cross-sectional view taken along 5-5 in FIG. 2, and FIG. 6 is a cross-sectional view taken along 6-6 in FIG. It is a longitudinal section.

Referring to FIG. 4 , the central axis C1 of the steam generator 223 and the central axis C2 of the water inlet 224 do not coincide, and a predetermined distance in the thickness direction of the steam generator 223 You can see that they are separated. This is because the heater 23, which is bent in a U shape, must be buried in the heater embedment part 221 at the same time as the steam generator 223 is generated.

In other words, in order to prevent the lower end of the heater 23 forming a U-shape from interfering with the steam generator 223, the lower end of the steam generator 223 avoids the lower end of the heater 23 to the lower side. to be extended to As a result, the water supply port 224 extends from the center of the heater embedding part 221 to the front. Also, the diameter of the passage connecting the lower end of the steam generator 223 and the water inlet 224 is formed to correspond to the inner diameter of the water inlet 224 .

Describing the shape of the steam generator 223 in another way, the steam generator 223 is formed to be stepped at the point where the lower end of the heater 23 passes, and the steam generator 223 is defined on the upper side of the surface. It may be said that the diameter of the generator 223 is larger than the diameter of the steam generator 223 defined on the lower side of the stepped surface.

Referring to FIG. 5 , a water level sensor 28 is mounted inside the housing 27 of the recovery unit 26 to measure the water level inside the housing 27 . Also, the inner space of the housing 27 and the inner space of the steam generator 223 communicate with each other through the common flow path 135 and the recovery flow path 273 . Therefore, the water level inside the housing 27 can be viewed as the water level inside the steam generator 223 . Therefore, since there is no need to mount a water level sensor inside the steam generator 223, there is an advantage in that the steam supply unit 21 can be easily manufactured.

Meanwhile, the water level sensor 28 may include an electrode type water level sensor. The electrode-type water level sensor has an advantage in that it has excellent heat resistance to withstand high temperatures compared to other types of water level sensors such as capacitive sensors.

In addition, the electrode type water level sensor 28 may pass through the upper surface of the housing 27 and be vertically inserted into the housing 27 to extend downward. If the water level sensor 28 is inserted horizontally from the side of the housing 27, the water supplied to the steam generator 223 leaks through the through hole through which the water level sensor 28 passes. It can be. Therefore, the water level sensor 28 is inserted through the upper surface of the housing 27 to prevent water leakage.

In addition, since the electrode-type water level sensor has superior ability to withstand high temperature heat compared to the capacitive sensor, it has an advantage in a situation where it is exposed to high temperature water vapor.

In detail, the water level sensor 28 includes a common electrode 281, a low level electrode 282, and a high level electrode 282. Also, the lower end of the common electrode 281 is at the same height as the lower end of the low level electrode 282 or extends to a position closer to the bottom of the housing 27 . Also, the lower end of the high level electrode 283 is located at a higher point than the lower end of the low level electrode 282 . Accordingly, when water fills the inside of the housing 27 and the water level reaches the lower end of the low water level electrode 282, current flows through the common electrode 281 and the low water level is sensed. And, when the water level touches the lower end of the high level electrode 282, the high level is sensed.

Meanwhile, Teflon coating is applied to the lower ends of the water level electrodes 281 , 282 , and 283 to minimize malfunction.

In addition, when the common electrode 281 and the low-level electrode 282 and the high-level electrode 283 corresponding to the operating electrode are disposed on one side with respect to the descending part 253, malfunction and malfunction due to flowing water The possibility of generating noise increases. In order to minimize the occurrence of this problem, the possibility and frequency of occurrence of noise due to malfunction of the electrode can be minimized by separating the mounting positions of the common electrode 281 and the operating electrode from each other with respect to the descending portion 253. .

That is, since the common electrode 281 and the operating electrode are divided and disposed on opposite sides of each other, the possibility that water flowing along the descending portion 253 flows along both the common electrode 281 and the operating electrode to generate noise is reduced. can be minimized.

Specifically, the common electrode 281 may be disposed on the left side of the lower portion 253 and the operating electrode may be disposed on the right side of the lower portion 253 .

In addition, as the frequency of use, that is, the higher the frequency of contact with the water surface, it is preferable to keep the electrode further away from the descending part 253 of the steam supply passage 25. Therefore, the common electrode 281, which has the highest contact frequency with the water surface, is located far from the descending part 253 so that discharged water generated during steam generation and condensed water generated during steam supply can Malfunction can be prevented by flowing along the inner circumferential surface of the part 253 and then riding on the electrode part.

For example, since the frequency of use of the low-level electrode 282 is higher than the frequency of use of the high-level electrode 283, the low-level electrode 282 is located outside the high-level electrode 283, and the descending portion 253 ) can be located on the farthest side from

In addition, a prevention part may be formed on the upper surface of the housing 27 between the descending part 253 and the electrode to minimize the flow of discharged water and condensed water along the electrodes 281 , 282 , and 283 . The prevention part may be recessed at a predetermined depth from the upper surface of the housing 27 . In other words, when viewed from the outside of the housing 27, the prevention part may be defined as a depression, and when viewed from the inside of the housing 27, it may be defined as a protrusion or a protrusion.

In detail, the prevention unit may include a first prevention unit 271 and a second prevention unit 272 . The first prevention part 271 is formed on the upper surface of the housing 27 between the lower part 253 and the common electrode 281 . The second prevention part 272 is formed on the upper surface of the housing 27 between the descending part 253 and the high level electrode 283 .

More specifically, the first prevention part 271 includes a first inner inclined surface 271a inclined toward the common electrode 281 from the lower end of the descending part 253 and a lower end of the first inner inclined surface 271a. It includes a first outer inclined surface 271b inclined upward from . In addition, since the first inner inclined surface 271a and the first outer inclined surface 271b form an approximately V-shaped cross-section, the water flowing along the inner circumferential surface of the descending part 253 flows along the first inner inclined surface 271a and the first outer inclined surface 271a. At the tip where the first outer inclined surface 271b meets, the surface tension is minimized and the object falls to the bottom of the housing 27 . Accordingly, it is possible to prevent water flowing along the descending portion 253 from flowing to the common electrode 281 .

Here, an angle formed by the first outer inclined surface 271b from a horizontal plane passing through a point where the first inner inclined surface 271a and the first outer inclined surface 271b meet is an angle formed by the first inner inclined surface 271a from the horizontal surface. By forming the angle larger than the formed angle, it is possible to prevent water from flowing toward the common electrode 281 .

Meanwhile, the second prevention part 272 also includes a second inner inclined surface 272a and a second outer inclined surface 272b like the first preventing part 271 . And, based on the horizontal plane passing through the point where the second inner inclined surface 272a and the second outer inclined surface 272b meet, the inclination angle of the second outer inclined surface 272b is greater than the inclined angle of the second inner inclined surface 272a. to form large.

Also, the depression length of the second prevention part 272 may be greater than the depression depth of the first prevention part 271 . Since the area of the upper surface of the housing 27 on which the working electrode is mounted is larger than the area of the upper surface of the housing 27 on which the common electrode 281 is mounted, the depth of the depression can be relatively increased. there is.

On the other hand, the steam under the condition of maintaining the temperature of the steam supply unit 21 having a casting type case 22 in which a U-shaped seed heater 23 is embedded and having a cylindrical steam generator 233 in the center is maintained at 180° C. Optimal steam generation efficiency can be achieved when the water level (h) in the generator 223 is maintained at 25% of the height (H) of the steam generator 223.

When the inside of the steam generator 233 is maintained at a low water level, the temperature of the steam generator 233 continuously rises, and the heater 23 is turned off to prevent overheating. As a result, the steam generation time is shortened, resulting in a decrease in steam generation efficiency.

Conversely, when the inside of the steam generating unit 233 is maintained at a high level, the temperature of the steam generating unit 233 is lower than the proper temperature, so that the time required for steam generation becomes longer and toward the outlet of the steam generating unit 233. A dolby phenomenon in which steam and water are discharged together may occur.

In addition, the inner diameter of the steam generator 223 that can produce optimal steam generation efficiency should be set differently according to the output of the heater 23 .

For example, when the output of the heater 23 is less than 1000W, the inner diameter of the steam generator 223 is appropriately 9 mm to 11 mm, and when the output is greater than 1000 W to less than 1500 W, the inner diameter of the steam generator 223 is 14 mm to 16 mm. is appropriate, and in the case of 1500W or more, the inner diameter of the steam generator 223 is appropriately 17mm to 19mm.

More preferably, when the output of the heater 23 is less than 1000W, the inner diameter of the steam generator 223 is appropriately 10 mm, and when the output is greater than 1000 W and less than 1500 W, the inner diameter of the steam generator 223 is 15 mm. It is appropriate, and in the case of 1500W or more, the inner diameter of the steam generator 223 is appropriately 18mm.

Meanwhile, the formation position of the cavity connection part 254 in the steam supply passage 25 will be described in more detail.

The cavity connection part 254 should be formed at a point lower than the center of the extension part 252 so that discharge water bouncing during steam generation may be blocked from entering the extension part 252 . If the cavity connection part 254 extends horizontally at the same height as the extension part 252, it is undesirable because discharged water may flow into the cooking chamber.

In addition, the cavity connection part 254 is preferably formed at a point spaced downward from the upper end of the descending part 253, but if it is formed at a point too close to the lower end, it is difficult to mount the water level sensor 28. . Therefore, the cavity connection part 254 is preferably formed at a point spaced at least 50 mm or more from the upper surface of the housing 27 .

In addition, it is preferable that the cavity connection part 254 has a part that is bent upward after extending horizontally rather than extending horizontally from the lower part 253 . This can be said to fundamentally block condensed water flowing along the inner circumferential surface of the descending part 253 from flowing into the cooking chamber along the cavity connection part 254 .

Referring to FIG. 6 , the length a1 from the upper end of the steam generator 223 to the stepped surface is about 8 times the length a2 from the stepped surface to the lower end of the case 22. It's good to be designed. If it exceeds 8 times, the distance between the rounded lower end of the U-shaped heater and the steam generator 223 is too close, so that the entire surface of the steam generator 223 cannot be heated at a uniform speed, and the step difference Heating non-uniformity in which the losing surface is rapidly heated may occur. Conversely, if the ratio is less than 8 times, a heating non-uniform phenomenon in which the heating rate of the stepped surface is slower than that of other parts may occur.

Alternatively, the stepped surface may be defined as the lower end of the steam generating unit, and a flow path between the stepped surface and the upper end of the water inlet 224 may be defined as a separate connection flow path.

In addition, a thermistor accommodating groove 222a for accommodating the thermistor may be formed in the thermistor embedding part 222 .

Claims (9)

A cylinder-shaped steam generating unit including a water supply port formed at a lower end and a discharge port formed at an upper end, and extending in a vertical direction;
a water supply passage connecting the water supply pump and the water inlet;
a heater extending in the longitudinal direction of the steam generator at a point spaced apart from the steam generator in both sides;
a thermistor mounted inside the case to prevent overheating of the heater;
a steam supply passage connected to the discharge port and through which the steam generated by the steam generator flows;
a housing for collecting condensed water formed by condensing a part of the steam flowing along the steam supply passage; and
In the steam supply device including a recovery passage extending from the bottom surface of the housing,
The steam supply passage,
a first passage connecting the discharge port and the upper surface of the housing;
A second flow path branched at a point of the first flow path and extending to a cooking chamber;
In order to prevent at least a portion of the steam flowing along the steam supply passage from being condensed in contact with water supplied to the steam generator through the water supply passage, an outlet of the water supply passage is directly connected to the water supply inlet,
The steam supply device of claim 1 , wherein an outlet of the recovery passage is connected to a point of the water supply passage upstream of the water supply inlet so that the condensed water discharged along the recovery passage can be re-supplied to the steam generator. According to claim 1,
The heater steam supply device comprising a U-shaped seed heater. According to claim 2,
Steam supply, characterized in that the steam generating unit is formed stepwise from a point spaced apart by a predetermined distance upward from the lower end to the lower end of the case to avoid interference between the lower end and the steam generating unit. Device. According to claim 3,
An upper end of the steam generator extends a predetermined length from the upper surface of the case to form a discharge port to which one end of the steam supply passage is connected;
A water supply port protrudes from the bottom of the case,
Steam supply device, characterized in that the water supply passage is connected to the water supply port. According to claim 4,
The steam supply device, characterized in that the central axis of the steam generator and the central axis of the water inlet are spaced apart in the front-back direction of the case. According to claim 4,
Steam supply device, characterized in that the distance from the upper end of the steam generator to the stepped portion is 8 times the distance from the stepped portion to the lower end of the case. According to claim 1,
When the output of the heater is less than 1000 W, the inner diameter of the steam generator is 9 mm to 11 mm,
When the output of the heater is greater than or equal to 1000 W and less than 1500 W, the inner diameter of the steam generator is 14 mm to 16 mm,
When the output of the heater is 1500W or more, the steam supply device, characterized in that the inner diameter of the steam generator is 17mm ~ 19mm. According to claim 1,
When the output of the heater is less than 1000 W, the inner diameter of the steam generator is 10 mm,
When the output of the heater is greater than or equal to 1000 W and less than 1500 W, the inner diameter of the steam generator is 15 mm,
When the output of the heater is 1500W or more, the steam supply device, characterized in that the inner diameter of the steam generator is 18mm. a cavity in which a cooking chamber is formed;
a door opening and closing the front opening of the cavity; and
A cooking appliance comprising the steam supply device according to any one of claims 1 to 8 mounted on an outer surface of the cavity and supplying steam into the cooking chamber.

Images