KR20060123902A - Safety apparatus of cooker with steam generation device and control method thereof - Google Patents

Abstract

A safety apparatus of a cooker with a steam generating device, and a control method thereof are provided to control the steam pressure and the temperature in the cooking room, and safely control the cooker by installing a sensing unit and discharging the steam according to the change of the temperature, pressure, and gas volume of the cooking room. A safety apparatus of a cooker with a steam generating device(30) for supplying the steam to a cooking room(10) is composed of: a sensing unit for sensing the sensor outputting value to detect the abnormal occurrence in the cooking room; a discharge unit for discharging the steam in the cooking room; and a control unit for controlling the discharge unit so as to discharge the steam in the cooking room if the detected sensor outputting value is compared with a predetermined set value and the sensor outputting value is over the set value. The discharge unit is a damper(19) mounted on the path where the steam is discharged, and is opened/closed according to the control of the control unit.

Description

Safety apparatus of cooker with steam generating device and control method thereof

1 is an external view showing the configuration of a cooker having a steam generator according to the present invention;

2 is a perspective view showing the configuration of a cooker having a steam generator according to the present invention;

3 and 4 are cross-sectional views taken along line II ′ of FIG. 2;

5 is a control block diagram of a safety device of a cooker having a steam generator according to the present invention;

6 is an operation flowchart of a safety control method of a cooker having a steam generator according to the present invention;

* Description of symbols on the main parts of the drawings *

2: door 10: cooking chamber

10a: sensor 17: intake vent

18: exhaust pipe 19: damper

30: steam generating unit 34: circulation fan

40: steam supply unit 120: control unit

The present invention relates to a cooker having a steam generator, and more particularly, to a safety device and a control method of the cooker having a steam generator to prevent the safety accident by discharging the steam in the cooking chamber to the outside when the cooker is abnormal.

In general, a cooker for cooking food includes a microwave oven using high frequency, a gas oven using an electric heater, an electric oven, and the like.

As gas ovens or electric ovens are cooked by directly applying heat to foods, foods are oxidized by contact with oxygen contained in the air, resulting in poor taste and unhealthy foods. There is a disadvantage in that the distinctive taste of food and cooking time is longer.

In addition, the microwave oven has a problem that if the high frequency is not uniformly injected into the food as cooked by scanning the high frequency food, the food is locally burned or less cooked, so that uniform cooking is difficult and the food is dried and the taste is poor.

In order to solve this problem, a method of uniformly cooking food having good taste and health by supplying steam into the cooking chamber has been proposed in Japanese Patent Laid-Open No. 2004-205130.

The cooker proposed in the publication is a saturated steam generator for converting water supplied from a water supply device into saturated steam, a superheated steam generator for further heating the generated saturated steam to generate superheated steam, and the generated superheated steam. Hot air and / or superheated steam is supplied into the cooking chamber, including a hot air generator for supplying hot air separately or together.

At this time, inside the cooking chamber, a large amount of steam with high pressure circulates as the circulation fan rotates, and hot steam is evenly transferred to the entire surface of the food by the circulation convection inside the cooking chamber, so that the food is cooked uniformly as a whole. The moisture is properly maintained and the food is cooked with delicious food.

As such, the circulation convection during cooking increases the temperature so much that the pressure inside the cooking chamber increases. Therefore, if the detected steam pressure is above a certain pressure by detecting the pressure change of the steam inside the cooking chamber, the damper installed in the exhaust path is opened and the exhaust fan is rotated to discharge the steam inside the cooking chamber to the outside to prevent safety accidents due to high pressure. .

However, such a conventional cooker has to be installed in addition to the existing circulation fan in order to discharge the steam in the cooking chamber to the outside, there is a problem of additional cost and productivity decrease due to the installation of the fan.

In addition, in addition to the natural pressure increase due to the rise in the temperature inside the cooking chamber, there is no safety device according to the above when an abnormal condition occurs such as food burning or gas generation due to fire.

Accordingly, the present invention is to solve the conventional problems as described above, an object of the present invention to prevent the safety accident by discharging the steam in the cooking chamber to the outside when an abnormality caused by the fluctuation of the cooking chamber pressure, temperature and gas amount. The present invention provides a safety device for a cooker having a steam generator and a control method thereof.

Another object of the present invention is to provide a safety device and a control method of the cooker which can increase productivity without additional cost by discharging steam inside the cooking chamber by using an existing circulation fan.

Still another object of the present invention is to discharge steam according to fluctuations in the cooking chamber temperature, pressure and gas amount to adjust the steam pressure and temperature inside the cooking chamber, and to generate steam that can safely control the cooker even when food is burned or a fire occurs. The present invention provides a safety device for a cooker equipped with the device and a control method thereof.

In order to achieve the above object, the present invention, a cooker having a steam generator for supplying steam into the cooking chamber, the detection unit for detecting a sensor output value for detecting the occurrence of abnormality in the cooking chamber; Discharge means for discharging steam in the cooking chamber; And a controller for comparing the sensed sensor output value with a predetermined reference value and controlling the discharging means to discharge steam inside the cooking chamber when the sensor output value is out of the reference value range.

The discharge means is a damper provided on a flow path through which steam is discharged, and is opened and closed under the control of the controller.

The detecting unit may be at least one of a pressure sensor for detecting a steam pressure inside the cooking chamber, a temperature sensor for detecting a temperature inside the cooking chamber, and a gas sensor for detecting the amount of gas inside the cooking chamber.

In addition, the present invention provides a method of controlling a cooker having a steam generator for supplying steam into a cooking chamber, the method comprising: sensing a sensor output value for detecting an abnormal occurrence in the cooking chamber; And comparing the detected sensor output value with a predetermined reference value and discharging steam inside the cooking chamber to prevent a safety accident when the sensor output value is out of the reference value range.

The sensing step may be characterized by detecting at least one of a sensor output value corresponding to the steam pressure, the temperature or the amount of gas in the cooking chamber.

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

1 is an external view showing the configuration of a cooker having a steam generator according to the present invention, Figure 2 is a perspective view showing the configuration of a cooker having a steam generator according to the present invention, Figures 3 and 4 It is sectional drawing of the II 'line.

3 illustrates a state in which the sensor 10a is installed in the cooking chamber 10, and FIG. 4 illustrates a state in which the sensor 10a is installed in the exhaust pipe 18.

1 to 4, the cooker having the steam generator according to the present invention includes a housing 1 forming an exterior, a cooking chamber 10 formed inside the housing 1 with a predetermined space with the housing 1, and a cooking chamber. Door (2) for opening and closing the open front of the (10), the operation panel 3 provided on the upper portion of the cooking chamber 10 for the operation control of the cooker.

The cooking chamber 10 includes a top plate 11, a bottom plate 12, both side plates 13, and a back plate 14 to form a predetermined space for cooking food, and on the back plate 14. A sensor 10a for detecting pressure, temperature, or gas amount inside the cooking chamber 10 is installed, and a heat insulating material is disposed in the space between the cooking chamber 10 and the housing 1 so that heat inside the cooking chamber 10 does not escape to the outside. (Not shown) is provided.

The sensor 10a refers to at least one of a pressure sensor detecting a steam pressure inside the cooking chamber 10, a temperature sensor detecting a temperature inside the cooking chamber 10, and a gas sensor detecting a gas amount inside the cooking chamber 10.

As shown in FIGS. 2 and 3, the sensor 10a is installed above the rear plate 14 near the connection between the cooking chamber 10 and the intake port 17 or as shown in FIG. 4. It can be installed on the flow path leading to the exhaust pipe 18 to be discharged.

In addition, the cooker equipped with a steam generator of the present invention, the water supply unit 20, the steam generating unit 30 is disposed in the space between the housing 1 and the cooking chamber 10 to supply steam to the cooking chamber 10. And a pair of steam supply units 40.

The water supply unit 20 is installed on all of the outer side of the upper plate 11 to supply water for generating steam to the steam generating unit 30, the steam generating unit 30 is the outer rear portion of the upper plate 11 It is installed on the steam supply unit 40 to supply steam, a pair of steam supply unit 40 is installed in each side plate 13 to supply the steam for cooking food to the cooking chamber (10). .

The water supply unit 20 is a water supply case 21, a water supply container 22 which is coupled or separated in a slide manner to the water supply case 21, and a water supply pipe connecting the water supply container 22 and the steam generating unit 30. It is provided with 23 to supply the water filled in the water supply container 22 to the steam generating unit 30 through the water supply pipe (23). The water supply pipe 23 is provided with a water supply valve 24 for opening and closing the water supply pipe 23 to adjust the amount of water supplied to the steam generating unit 30.

The steam generating unit 30 is installed in the steam container 31, the steam container 31, the U-shaped steam heater 32 to generate steam of a high temperature (about 1000W) by instantaneously heating the water passing through The fan casing 33 coupled to communicate with the steam container 31, the circulation fan 34 installed inside the fan casing 33, and extends from the steam container 31 toward each steam supply unit 40. And a plurality of steam pipes 35 for supplying steam generated by the steam heater 32 from the steam container 31 to each steam supply unit 40.

Each steam supply unit 40 is coupled to the outer side of the side plate 13 of the cooking chamber 10 to form a flow path for communicating the cooking chamber 10 and the steam pipe 35 of the steam generating unit 30 ( 41), a circulation fan (not shown) and a heater (not shown) are provided in the steam duct 41.

In the center and the edge of each side plate 13 of the cooking chamber 10 are formed a plurality of inlet holes 15 and outlet holes 16 having a small size, the temperature is exchanged with food in the cooking chamber 10 The fallen steam flows into the steam duct 41 through the centers of both side plates 13, changes into superheated steam, and then flows back to the cooking chamber 10 along the edges of both side plates 13. Convective circulation occurs.

In addition, an inlet port 17 is formed at the center of the upper plate 11 of the cooking chamber 10 to communicate with the fan casing 33 of the steam generating unit 30 so that the steam inside the cooking chamber 10 is the fan casing 33. Sucked by the circulation fan 34 installed in the inlet is introduced into the steam supply unit 40 together with the steam generated in the steam container 31, and is sent back to the cooking chamber 10 through a plurality of outlet holes (16) Recirculation takes place.

The opening and closing of the steam container 31 is controlled by a damper 19, and an exhaust pipe 18 extending to the outside of the housing 1 is installed to provide a damper 19 of the intake port 17 and the exhaust pipe 18. When the circulation fan 34 is operated in the opened state, smoke or gas inside the cooking chamber 10 is discharged to the outside of the housing 1 through the exhaust pipe 18 together with the steam. Accordingly, during cooking, the steam pressure and temperature inside the cooking chamber 10 may be controlled to safely discharge hot steam and gas.

On the other hand, the end of the exhaust pipe 18 is provided with a filter 18a for decomposing steam, gas, smoke discharged through the exhaust pipe 18 to remove odors and the like. As the filter 18a, a deodorization, a deodorizer, or the like is used.

In addition, a cooling fan 50 is installed at the rear of the housing 1 to cool the space between the housing 1 and the cooking chamber 10, and a drain valve 52 is provided at the water supply pipe 23 of the water supply unit 20. Opening and closing by the drain pipe 51 is extended to the inside of the cooking chamber 10 is connected to enable the water remaining in the steam container 31 and the water supply container 21 after cooking through the cooking chamber 10.

5 is a control block diagram of a safety device for a cooker having a steam generator according to the present invention, including a sensor 10a, a signal input unit 100, a control unit 120, a driving unit 130, and a display unit 140. do.

The signal input unit 100 is provided with a plurality of keys on the operation panel 3 to input the cooking information (cooking time, cooking menu, cooking start / stop, etc.) desired by the user to the control unit 120.

The controller 120 is a microcomputer that controls the devices of the cooker according to the cooking information input from the signal input unit 100. The controller 120 is a value input from the sensor 10a, that is, the steam pressure, temperature, or gas amount of the cooking chamber 10. The corresponding sensor output value Sc is compared with the predetermined first and second reference values S1 and S2 to control the opening and closing operation of the damper 19 provided in the exhaust pipe 18 according to the comparison result.

This is to detect the abnormality caused by the change in the steam pressure, temperature or gas amount inside the cooking chamber 10 and to control the safety accident by discharging high temperature steam (including smoke or gas) inside the cooking chamber 10 to the outside. It is.

On the other hand, the control unit 120 should be previously stored in the data about the output value of the sensor 10a corresponding to the steam pressure, temperature or gas amount in the cooking chamber 10, the data can be appropriately set by the designer.

The drive unit 130 is a damper 19, water supply valve 24, steam heater 32, circulation fan 34, cooling fan 50, drain valve 52 in accordance with the drive control signal of the control unit 120 And the like, and the display unit 140 displays a cooking time, a cooking menu, an operation state of the cooker, etc. input by the user on the operation panel 3 according to the display control signal of the controller 120.

Hereinafter, the operation process and the effect of the safety device and the control method of the cooker having the steam generator configured as described above will be described.

6 is an operation flowchart of a safety control method of a cooker having a steam generator according to the present invention.

As an initial condition for explaining the operation of the present invention, it is assumed that the damper 19 installed in the exhaust pipe 18 is closed.

First, the food is put in a tray (not shown) inside the cooking chamber 10, the manipulation panel 3 is operated to select the cooking information desired by the user, and then the start key is pressed. It is input to the control unit 120 through (S100).

Therefore, the control unit 120 turns on the water supply valve 24 so that the water in the water supply container 22 is supplied to the steam container 31 through the water supply pipe 23, and the water supplied to the steam container 31 is steamed. It is controlled to be heated by the heater 32.

The steam produced in the steam container 31 by the steam heater 32 is sent to the respective steam ducts 41 through the steam pipes 35 in accordance with the operation of the circulation fan 34, and subsequently inside the steam duct 41. In accordance with the operation of the circulating fan (not shown) and the superheated steam heater (not shown) of the cooking chamber through a plurality of outlet holes 16 formed in both side plates 13 of the cooking chamber 10 is changed to the superheated steam of a higher temperature 10 is supplied into the inside (S110).

The superheated steam supplied into the cooking chamber 10 delivers heat to the food to cook the food, and in this process, the steam having a lower temperature causes a plurality of inflow holes 15 formed in both side plates 13 of the cooking chamber 10. The internal circulation is supplied to the steam duct 41 and heated again, and then supplied to the cooking chamber 10 through the outlet hole 16 again.

At this time, as the circulation fan 34 operates in a state in which the damper 19 of the exhaust pipe 18 is closed, steam in the cooking chamber 10 passes through the steam pipes 35 together with the steam made in the steam container 31. A symmetrical external circulation that flows to the steam supply unit 40 and returns to the cooking chamber 10 is achieved.

As this process proceeds, a large amount of steam with a high pressure is circulated in the cooking chamber 10, and a very high temperature steam is uniformly delivered to the entire surface of the food by the convection circulation in the cooking chamber 10, so that the food is overall. While being cooked uniformly, the moisture of the food is properly maintained, so that the food is cooked with delicious and healthy food.

In this way, while cooking, convective circulation of high temperature steam in the cooking chamber 10 increases the temperature of the cooking chamber 10, and when the cooking chamber 10 rises, the pressure inside the sealed cooking chamber 10 increases and increases. Pressure is transmitted throughout the cooker. At this time, if the increased pressure is not adjusted, a dangerous accident may occur in which the door 2 that opens and closes the open front of the cooking chamber 10 is opened.

In addition, when the cooking chamber 10 rises in temperature, gas (including burnt odor) is generated as the food is burned at a predetermined temperature or more, and the generated gas continues to circulate inside the cooking chamber 10 together with the steam to allow food as well as steam. May cause odors or contaminate the passage through

In addition, a significant amount of gas may be generated in the event of a fire due to overheating in the cooking of food.

In this way, the sensor output value Sc corresponding to the steam pressure, the temperature or the amount of gas in the cooking chamber 10 that changes during cooking is detected by the sensor 10a and input to the controller 120 (S120).

Accordingly, the controller 120 determines whether the sensor output value Sc input from the sensor 10a is equal to or greater than a first predetermined reference value S1 (a sensor output value starting to detect that an abnormality occurs in the cooking pressure, steam pressure, temperature and gas amount). Determine (S130).

When the sensor output value Sc is equal to or greater than the first reference value S1, it is determined that the steam pressure of the cooking chamber 10 is abnormal or that the temperature condition in which the food may burn or the gas is generated while the food burns is performed. ) Opens the damper 19 and discharges the high temperature steam circulated in the cooking chamber 10 to the outside through the exhaust pipe 18 (S140 to S150).

When the high-temperature steam circulated in the cooking chamber 10 is discharged, smoke or gas in the cooking chamber 10 is also discharged to adjust the steam pressure and temperature in the cooking chamber 10, and food burns or a fire is generated. You can safely control the cooker.

As such, as the smoke or gas is discharged to the outside together with the high temperature steam inside the cooking chamber 10, the steam pressure, temperature, or gas amount inside the cooking chamber 10 begins to decrease, and the sensor output value Sc at this time is measured by the sensor 10a. Is detected by the control unit and input to the control unit 120.

Therefore, the controller 120 determines whether the input sensor output value Sc is less than the second predetermined reference value S2 (sensor output value determined to be abnormal in the cooking chamber) (S160).

When the sensor output value Sc is less than the second reference value S2, the control unit 120 closes the damper 19 so that high temperature steam is circulated inside the cooking chamber 10 to stably control the temperature of the cooking chamber 10. (S170).

As described above, the damper 19 is opened and closed according to the sensor output value Sc corresponding to the steam pressure, the temperature, or the amount of gas in the cooking chamber 10 that changes during cooking, thereby discharging the steam or gas inside the cooking chamber 10 to the outside. (10) It can prevent the safety accident in case of abnormality while controlling temperature stably.

Next, the controller 120 determines whether cooking is completed (S180), and if the cooking is not completed, returns to step S110, and when the cooking is completed, the operation ends.

Meanwhile, in an embodiment of the present invention, the sensor 10a is installed on the flow passage leading into the cooking chamber 10 or the exhaust pipe 18, and the damper 19 is installed to discharge steam or gas. However, the present invention is not limited thereto, and the sensor 10a may be installed at any position capable of detecting steam pressure, temperature, or gas amount of the cooking chamber 10, and a valve may be installed to discharge steam or gas. Of course, the same purpose and effect can be achieved.

As described above, according to the safety device and the control method of the cooking apparatus equipped with a steam generator according to the present invention, when the abnormality caused by the change in the temperature, pressure and gas volume of the cooking chamber to discharge the steam inside the cooking chamber to the outside safety It has the effect of being able to reliably prevent accidents.

In addition, the present invention has the effect that there is no additional cost and increase the productivity by discharging the steam inside the cooking chamber using the existing circulation fan.

In addition, the present invention can control the steam pressure and temperature inside the cooking chamber by discharging the steam in accordance with the fluctuation of the cooking chamber temperature, pressure and gas amount, there is an effect that the cooker can be safely controlled even when the food is burned or a fire occurs.

What has been described above is only one embodiment for implementing a safety device and a method of controlling the cooker having a steam generator according to the present invention, the present invention is not limited to the above-described embodiment, the technical idea of the present invention Of course, various modifications are possible by those skilled in the art.

Claims (5)

In a cooker having a steam generator for supplying steam into the cooking chamber, A detector configured to detect a sensor output value for detecting an abnormal occurrence in the cooking chamber; Discharge means for discharging steam in the cooking chamber; And A controller for comparing the detected sensor output value with a predetermined reference value and controlling the discharging means to discharge steam inside the cooking chamber when the sensor output value is out of the reference value range; Safety device for a cooker having a steam generator, characterized in that it comprises a. The method of claim 1, The discharge means is a damper installed on a flow path through which steam is discharged, the safety device of a cooker having a steam generator, characterized in that the opening and closing under the control of the controller. The method of claim 1, The detector is at least one of a pressure sensor for detecting the steam pressure inside the cooking chamber, a temperature sensor for detecting the temperature inside the cooking chamber, a gas sensor for detecting the amount of gas inside the cooking chamber. In the control method of the cooker having a steam generator for supplying steam into the cooking chamber, Sensing a sensor output value for detecting an abnormal occurrence in the cooking chamber; And Comparing the detected sensor output value with a predetermined reference value and discharging steam inside the cooking chamber to prevent a safety accident when the sensor output value is out of the reference value range. Safety control method for a cooker having a steam generating device comprising a. The method of claim 4, wherein The detecting step is a safety control method of a cooker having a steam generating device, characterized in that for detecting at least one of the sensor output value corresponding to the steam pressure, temperature or gas amount inside the cooking chamber.

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