KR100745585B1 - Method for controlling temperature of cooker with steam generation device - Google Patents

Abstract

The present invention relates to a temperature control method of a cooker having a steam generator, and discharges the high temperature steam circulated in the cooking chamber to the outside according to the cooking chamber temperature to stably adjust the cooking chamber temperature during cooking, and to safety accident after cooking. The purpose is to prevent it.

To this end, the present invention provides a control method of a cooker having a steam generator for supplying steam into a cooking chamber, the method comprising: counting a cooking time; Determining whether a cooking completion time is within a predetermined time based on the countered cooking time; And when the cooking completion time is determined to be within a predetermined time, controlling the cooking chamber temperature by discharging the steam inside the cooking chamber.

Description

Method for controlling temperature of cooker with steam generation device

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 is a cross-sectional view taken along line II ′ of FIG. 2;

4 is a block diagram of a temperature control device for a cooker having a steam generator according to the present invention;

5 is an operation flowchart of a temperature 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: temperature 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 cooking appliance having a steam generator, and more particularly to a temperature control method of a cooker having a steam generator for stably controlling the cooking chamber temperature by discharging the high temperature steam circulated in the cooking chamber to the outside according to the cooking chamber temperature. It is about.

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 Nos. 2004-162936 and 2004-205130.

The cookers proposed in the publication include a saturated steam generator for converting water supplied from a water supply device into saturated steam, a superheated steam generator for generating superheated steam by further heating the generated saturated 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 for cooking.

At this time, as the convection heat is generated in accordance with the circulation of the superheated steam supplied into the cooking chamber, the cooking chamber temperature is increased, and the food placed in the cooking chamber is heated to cook.

However, in the conventional cooker equipped with a steam generator, when the cooking chamber temperature rises above a certain temperature due to high temperature circulation convection, a separate control device is not provided, and when the cooking chamber temperature is above a certain temperature, food is burned, and the cooking is completed. When the door is opened, hot steam inside the cooking chamber is delivered to the user, causing a risk of burns.

Accordingly, the present invention is to solve the conventional problems as described above, an object of the present invention is to discharge the high-temperature steam circulated in the cooking chamber to the outside according to the cooking chamber temperature to stabilize the cooking chamber temperature during cooking, cooking In the future, to provide a temperature control method for a cooker having a steam generator that can prevent a safety accident.

In order to achieve the above object, the present invention provides a control method of a cooker having a steam generator for supplying steam into the cooking chamber, the method comprising the steps of: counter cooking time; Determining whether a cooking completion time is within a predetermined time based on the countered cooking time; And when the cooking completion time is determined to be within a predetermined time, discharging the steam inside the cooking chamber in advance.

In addition, the predetermined time before the completion of cooking is characterized in that it is designed differently according to the capacity or cooking conditions of the cooker.

In addition, the predetermined time before the completion of cooking is characterized in that less than about 10 minutes.

In addition, the step of discharging the steam in the cooking chamber in advance before the completion of cooking, detecting the cooking chamber temperature and continues to discharge the steam in the cooking chamber until the detected cooking chamber temperature reaches a predetermined reference value range. It is done.

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 generating device according to the present invention, Figure 3 is the I-I of FIG. It is a line cross section.

1 to 3, the cooker having the steam generator according to the present invention includes a housing 1 forming an external appearance, 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 temperature sensor 10a for detecting the temperature of the cooking chamber 10 is installed, and a heat insulating material (not shown) 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. Is provided.

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. Recycled by suction by the circulation fan 34 installed in the steam supply unit 40 together with the steam generated in the steam supply 31, and is sent back to the cooking chamber 10 through a plurality of outflow holes (16) This is done.

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, the steam inside the cooking chamber 10 may be discharged to the outside of the housing 1 so that the steam pressure and temperature inside the cooking chamber 10 can be adjusted during cooking. After that, it is possible to safely discharge the high temperature steam in the cooking chamber 10.

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.

4 is a configuration diagram of a temperature control device of a cooker having a steam generator according to the present invention, including a temperature sensor 10a, a signal input unit 100, a control unit 120, a driving unit 130, and a display unit 140. It is composed.

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

The control unit 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 controls the temperature value Tc of the cooking chamber 10 input from the temperature sensor 10a. Compared with the first and second reference values T1 and T2, the opening and closing operation of the damper 19 installed in the exhaust pipe 18 is controlled according to the comparison result.

This convection circulation of hot steam into the cooking chamber 10 according to the cooking chamber 10 temperature or discharged to the outside of the housing 1 to adjust the steam pressure and temperature inside the cooking chamber 10 during cooking, and after cooking. It is to control to safely discharge the high temperature steam inside the cooking chamber (10).

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

5 is a flowchart illustrating a method of controlling a temperature 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 counters the cooking time (S110) and 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 steam The water supplied to the container 31 is controlled to be heated by the steam 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 to the inside (S120).

The superheated steam supplied into the cooking chamber 10 transfers heat to the food to cook the food, and in this process, the steam whose temperature is lowered has a plurality of inlets 15 formed in both side plates 13 of the cooking chamber 10. Through the inlet to the steam duct 41 and heated again, the internal circulation is supplied to the cooking chamber 10 through the outlet hole 16 again.

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

As this process proceeds, the inside of the cooking chamber 10 is circulated with a large amount of steam with a high pressure, and by the convective circulation inside the cooking chamber 10, very high temperature steam is evenly delivered to the entire surface of the food. While the food is cooked uniformly as a whole, the moisture of the food is properly maintained, so that the food is cooked to taste good and healthy food.

As described above, the cooking chamber 10 temperature starts to rise while convection of steam having a very high temperature inside the cooking chamber 10 during cooking, and the cooking chamber temperature Tc is sensed by the temperature sensor 10a. In operation S130, the controller 120 determines whether the input cooking chamber temperature Tc is greater than or equal to a predetermined first reference value T1 (the cooking chamber temperature at which food starts burning, about 200 ° C.) (S140). ).

When the cooking chamber temperature Tc is greater than or equal to the first reference value T1, it is determined that food is a temperature condition in which food can burn, and the control unit 120 opens the damper 19 to circulate the high temperature steam circulated inside the cooking chamber 10. Discharge to the outside through the exhaust pipe (18) (S150 ~ S160).

As the steam of the cooking chamber 10 is discharged to the outside, the temperature of the cooking chamber 10 begins to decrease, and the cooking chamber temperature Tc is sensed by the temperature sensor 10a and input to the controller 120.

Therefore, the control unit 120 determines whether the input cooking chamber temperature Tc is less than a second predetermined reference value T2 (cooking chamber minimum temperature required for cooking food, about 150 ° C.) (S170).

When the cooking chamber temperature Tc is less than the second reference value T2, the control unit 120 closes the damper 19 so that hot steam is circulated inside the cooking chamber 10 to stably control the cooking chamber 10 temperature. (S180).

In this way, the damper 19 is opened and closed in accordance with the cooking chamber temperature Tc to circulate the hot steam into the cooking chamber 10 or discharge it to the outside through the exhaust pipe 18 to thereby maintain the temperature of the cooking chamber 10 during cooking. I can regulate it stably.

Therefore, the control unit 120 should store data on the value of the temperature sensor 10a corresponding to the temperature change of the cooking chamber 10 in advance, and the data can be appropriately set by the designer.

Thereafter, according to the cooking time counted by the controller 120, it is determined whether the cooking completion time point is within a predetermined time (about 10 minutes, which can be designed differently according to the capacity or condition of the cooker) (S190). If not, return to step S110.

On the other hand, when the cooking completion point within a predetermined time, the control unit 120 opens the damper 19 to quickly discharge the high temperature steam circulated in the cooking chamber 10 to the outside through the exhaust pipe 18 (S210). This is to prevent a safety accident after cooking.

Next, it is determined whether the cooking is completed (S220), and if the cooking is not completed, the process returns to step S200, and when the cooking is completed, the operation ends.

Meanwhile, in an embodiment of the present invention, the temperature sensor 10a is installed inside the cooking chamber 10 and the damper 19 is installed for discharging steam, but the present invention is not limited thereto. It is a matter of course that the same object and effect as those of the present invention can be achieved by installing the valve 10a on the flow passage leading to the exhaust pipe 18 and installing a valve for discharging steam.

As described above, according to the temperature control method of the cooker having a steam generator according to the present invention, when the cooking chamber temperature is a certain temperature or more, the high temperature steam circulated inside the cooking chamber is discharged to the outside to stabilize the cooking chamber temperature during cooking. There is an effect that can be adjusted uniformly.

In addition, the present invention has an effect that it is possible to prevent the user's burn (safety accident) due to the high temperature steam when the user opens the door after cooking by discharging the high temperature steam inside the cooking chamber to the outside at the completion of cooking.

Claims (4)

In the control method of the cooker having a steam generator for supplying steam into the cooking chamber, Counting a cooking time; Determining whether a cooking completion time is within a predetermined time based on the countered cooking time; And If it is determined that the cooking completion time is within a predetermined time, discharging the steam in the cooking chamber in advance; Temperature control method of a cooker having a steam generator comprising a. The method of claim 1, The predetermined time period before the completion of cooking is a temperature control method of a cooker having a steam generator, characterized in that it is designed differently according to the capacity or cooking conditions of the cooker. The method of claim 2, The predetermined time before the completion of cooking time is a temperature control method for a cooker having a steam generator, characterized in that less than about 10 minutes. The method of claim 1, The step of discharging the steam in the cooking chamber in advance before the completion of cooking, And detecting the cooking chamber temperature and continuing to discharge steam inside the cooking chamber until the detected cooking chamber temperature reaches a predetermined reference value range.

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