KR20230096527A - Method to Auto Control of Range Hood Fan - Google Patents

Abstract

The present invention relates to a method for automatically controlling a hood fan of a cooking appliance, and an object of the present invention is to automatically control the speed of a hood according to a temperature change of food or a cooking vessel detected by a temperature sensor provided in the cooking appliance.

Description

Method to automatically control hood fan of cooking appliance {Method to Auto Control of Range Hood Fan}

The present invention relates to a method for automatically controlling a hood fan of a cooking appliance, and more particularly, to automatically control a hood fan of a cooking appliance to automatically control the speed of a hood according to a temperature change by sensing the temperature of a food or a cooking vessel during cooking. It's about how.

In general, cooking utensils are ranges using gas or electricity, and a range hood is provided on the top of the range hood to absorb odors, heat, harmful gases, etc. generated as food is heated during cooking and discharge them to the outside.

The range hood generally includes a fan for generating suction power, a fan motor, and a discharge pipe for discharging air sucked by the fan to the outside.

In this range hood, the user determines the cooking state and smell of the food and controls the rotation speed of the fan by manipulating the provided switch.

This driving method has limitations in applying to various ventilation conditions. Conventionally, a range hood system and its control method that allow the exhaust fan to rotate differentially according to the ambient temperature, etc. are registered in Korean Patent Registration No. 10-1439252 ( Announcement date 2014.09.11).

1 is a flow chart of a range hood control method according to the prior art, comprising the steps of rotating a driving motor by a controller according to a detected value of a sensor; determining, by a controller, whether the detected value of the sensor corresponds to a stop state of the driving motor; if the control unit is not in a stop state, driving the driving motor in a single number corresponding to the sensed value of each sensor stored in the storage unit in conjunction with the storage unit; determining, by a controller, whether the stop button is in an on or off state during driving; When the stop button is pressed for the first time as a result of the determination, the step of temporarily stopping the driving motor by the control unit; Even in the temporary stop state, the control unit monitors whether the detected value of the sensor corresponds to stop; When the stop button is pressed once more, the control unit releases the temporary stop state of the driving motor, and returns to and executes the step of driving the driving motor with the number corresponding to the detected value of the sensor.

In the range hood control method according to the prior art, the exhaust fan is temporarily stopped by pressing the stop button once in a state where the exhaust fan is rotating at an appropriate number of rotations according to the detection value detected by the sensor, and in this state, the stop button When is pressed again, the exhaust fan's temporary stop mode is released and the exhaust fan rotates. At this time, the exhaust fan does not simply rotate at a constant speed, but rotates differentially according to the sensor's detection value to suit the surrounding environment. There is an advantage in that the efficiency of the stop button can be increased because the exhaust fan can be rotated differentially without the need to reset the number of revolutions of the exhaust fan.

However, such a range hood control method according to the prior art is intended to increase the efficiency of a stop button that detects repeated pressing and causes the exhaust fan to stop or rotate differentially according to a sensor detection value, and does not operate the stop button. If not, there is a problem that the hood is not controlled, and there is a problem in that the sensor is attached to the hood and there is a limit in accurately measuring the temperature of the food and the cooking vessel.

Domestic Patent Registration No. 10-1439252 (Announcement date 2014.09.11.)

Therefore, in order to improve the problems of the prior art, the present invention automatically controls the hood fan of the cooking appliance to automatically control the speed of the hood according to the temperature change of the food or cooking vessel detected by the temperature sensor provided in the cooking appliance. Its purpose is to provide a method.

In order to achieve the object of the present invention, a method for automatically controlling a hood fan of a cooking appliance is a method for automatically controlling a hood fan of a cooking appliance in which the speed of the hood fan is adjusted according to a result of detecting a temperature measured by a temperature sensor provided in the cooking appliance. wherein, as the cooking appliance starts cooking, a first step of driving the hood fan with a standard air volume selected by a user by a hood fan control unit; a second process of determining whether or not the set parallel range temperature (ΔX1) is maintained by calculating a temperature change value per hour in an air volume determining unit when the temperature value measured by the temperature sensor is detected as higher than the set specific temperature (X1); In the second process, when the temperature change value is calculated to be equal to or greater than the reference increase temperature change value ΔX2 within a set time T1 while maintaining the equilibrium range temperature ΔX1, the speed of the hood fan through the hood fan control unit. A third process of raising ; and a fourth process of lowering the air volume when the temperature change value calculated after the third process is calculated to be greater than or equal to the set falling temperature change value (ΔX3) within the set time period (T2).

Here, in the second process, when the temperature change value per hour maintains the parallel range temperature ΔX1 for a certain period of time, it is determined that the food is cooked by moisture heating, and the temperature change value per hour maintains the parallel range temperature ΔX1 If is not maintained for a certain period of time, it is characterized in that it is judged as a cooking item with a high boiling point using oil.

In addition, in the second process, when the temperature change value per hour exceeds the specific temperature (X1) outside the parallel range temperature (ΔX1) and exceeds the set reference temperature (X2), cooking of ingredients with a high boiling point with little moisture and, after raising the speed of the hood fan to “strong”, moving to the fourth process.

The method for automatically controlling a hood fan of a cooking appliance according to the present invention monitors the temperature of food or a cooking vessel during cooking of the cooking appliance and automatically controls the air volume of the hood according to the temperature change rate of the food or cooking vessel, thereby enabling efficient ventilation. , It not only reduces energy consumption due to unnecessarily strong air volume, but also has the effect of enabling cooking in a quiet and pleasant environment.

1 is a flowchart of a range hood control method according to the prior art;
2 is a block diagram of an automatic control device for a hood fan of a cooking appliance for implementing the present invention;
3 is a flowchart of a process of automatically controlling a hood fan of a cooking appliance according to an embodiment of the present invention;
4 is a graph for explaining air volume control of a hood fan according to temperature change of general food in FIG. 3;
FIG. 5 is a diagram for explaining air volume control of a hood fan according to a temperature change of food using oil in FIG. 3 .

The features and effects of the present invention described above will become more apparent through the following detailed description in relation to the accompanying drawings, and accordingly, those skilled in the art to which the present invention belongs can easily implement the technical idea of the present invention. You will be able to.

Since the present invention can have various changes and various forms, specific embodiments are exemplified and described in detail in the text.

However, this is not intended to limit the present invention to the specific disclosed form, and it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention.

A method for automatically controlling a hood of a cooking appliance according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a hood automatic control device of a cooking appliance for implementing the present invention, including a temperature sensor 101 attached to a cooking appliance 110 to detect the temperature of food or a cooking vessel, and the temperature sensor A temperature input unit 111 that acquires the measured value of the temperature detected from 101 in real time, calculates the real-time temperature change obtained from the temperature input unit 111, and adjusts the temperature of the hood according to the set reference temperature or reference temperature change value. It consists of an air volume determining unit 112 that calculates air volume data and a first communication unit 113 that outputs the air volume data calculated by the air volume determiner 112 to the hood 120, and the hood 120 cooks The second communication unit 121 receives the air volume data transmitted through the first communication unit 113 of the device 110, and the hood fan generates air volume corresponding to the air volume data received through the second communication unit 121. It is composed of a hood fan controller 123 that controls the speed of 130.

Here, the air volume determination unit 112 may be provided inside the hood 120 .

A method for maintaining a set room temperature during heating repetition timer operation according to an embodiment of the present invention using the hood automatic control device of the cooking appliance configured as described above will be described in detail with reference to FIGS. 2 to 5 attached.

3 is a flow chart of an automatic hood control process of a cooking appliance according to an embodiment of the present invention. As shown therein, when a user starts to use the cooking appliance and drives the hood fan 130, the hood fan 130 is driven. (130) maintains the rotational speed at the standard air volume. (S11)

Here, the user can adjust the air volume by using the air volume selection button 102 when cooking starts.

When cooking starts, the cooking appliance 110 receives the measured temperature value of the food or cooking vessel measured through the temperature sensor 101 through the temperature input unit 111 in real time.

The measured temperature value of the food or cooking vessel input to the temperature input unit 111 is compared with the specific temperature X1 set by the air volume determination unit 112 (S13).

When the measured temperature value is higher than the specific temperature (X1), a temperature change value per hour of the food is calculated, and the temperature change value is compared with the set parallel range temperature (ΔX1) (S15).

FIG. 4 shows a graph of temperature rise and air volume control when the food is cooked using moisture. Referring to this graph, the standard air volume set by the user is shown in a section where the temperature change value maintains the parallel range temperature ΔX1. keep

In this section, water vapor starts to evaporate when a common food containing moisture is heated and equilibrium is maintained until the moisture is completely evaporated.

When the temperature of the food measured by the temperature sensor 101 continues to rise, the air volume determination unit 112 calculates the temperature increase rate of the food, and calculates the change in temperature (ΔX2) of the food within the set time T1. , The speed of the hood fan 130 is increased through the air volume control unit 122, and the user is notified of this by using a display unit, a buzzer, or a voice. (S19)

That is, at this time, the steam of the food is completely evaporated and the temperature of the food is rapidly increased, and the food may be burned or burned.

When the user recognizes the speed increase of the hood fan 130 through the alarm during cooking and takes measures such as reducing heat power or adding water or other ingredients, the temperature of the food to be cooked decreases.

When the temperature of the food input through the temperature input unit 111 is calculated to be equal to or greater than the standard falling temperature change value ΔX3 as a result of calculating the temperature change within a certain period of time (T2) in the air volume determining unit 112, the hood The rotational speed of the hood fan 130 is reduced through the fan controller 122 . (S23) (S25)

That is, as the temperature of the food decreases, it is determined that a strong air volume is unnecessary, and the air volume returns to the standard air volume, and the user is notified of this by using a display unit, a buzzer, or a voice.

When the user extinguishes the cooking appliance after cooking is completed, the temperature of the food input through the temperature input unit 111 drops below the reference value, and the air volume determination unit 122 detects this, so that the user can use the hood fan. Even if the stop button is not pressed, the hood fan 130 is stopped through the hood fan controller 122 .

On the other hand, when the food is cooked using oil instead of general cooking containing water, the temperature is slowly raised to a high temperature of 150° C. or higher, unlike cooking using water. In other words, cooking using oil generates a lot of oil vapor and generates a peculiar smell of oil, so it operates with a strong air volume.

Referring to FIG. 5, the hood fan control in the case of food using the oil will be described in more detail below.

The measured temperature value of the food measured through the temperature sensor 101 is input through the temperature input unit 111 .

The air volume determination unit 112 compares the input measured temperature value with the specific temperature X1, and after the measured temperature value exceeds the specific temperature X1, it continues to rise without the parallel range temperature ΔX1. When the high temperature reference temperature (X2) is exceeded, the air volume is increased to drive the "strong" air volume. (S21)

The air volume data determined by the air volume determination unit 112 is received from the hood control unit 122 of the hood 120, the hood fan 130 is driven to generate a corresponding "strong" air volume, and the user is notified of this. . (S19)

On the other hand, if the temperature value measured by the temperature sensor 101 exceeds the overheating temperature (X3) set as the fire occurrence temperature, stop heating to prevent fire and remove smoke that may occur in an overheated state. To do this, the speed of the hood fan is raised to “strong” and controlled (S31).

At this time, the overheat temperature X3 set as the fire occurrence temperature may be set to, for example, 250 degrees, which is the temperature at which oil ignites during oil cooking, or 220 degrees, which is the smoke generation temperature of oil.

In addition, after the speed of the hood fan is increased to “strong”, the temperature value measured by the temperature sensor may be maintained until it falls below the overheating temperature (X3) set as the fire occurrence temperature.

The heat power of the hood fan 130 is reduced by the user during the "strong" air volume or by inputting other materials, so that the calculated temperature change is the set falling temperature change value (ΔX3) within a certain time period (T2). ) When an abnormality is detected, the hood fan 130 is lowered to the standard air volume and driven. (S23) (S25)

In this way, the air volume determination unit 112 determines whether the food is water-based or oil-based based on the presence or absence of the equilibrium range temperature ΔX1, determines the air volume accordingly, and drives the hood fan 130 with the corresponding air volume. automatically controlled to do so.

As described above, although the method for automatically controlling hood airflow of a cooking appliance according to an embodiment of the present invention has been described with limited embodiments and drawings, it is not limited by these embodiments, and conventional knowledge in the art to which the present invention belongs Various modifications and variations are possible, of course, within the technical spirit of the present invention and the equivalent scope of the claims to be described below by those who have it.

101: temperature sensor 110: cooking appliance
111: temperature input unit 112: air volume determination unit
113: first communication unit 120: hood
121: second communication unit 122: hood fan control unit
130: hood fan

Claims (9)

In the method for automatically controlling a hood fan of a cooking appliance for adjusting the speed of the hood fan according to a result of detecting a temperature measured by a temperature sensor provided in the cooking appliance,
a first process of driving the hood fan with a standard air volume selected by a user by a hood fan control unit as the cooking appliance starts cooking;
a second process of determining whether or not the set parallel range temperature (ΔX1) is maintained by calculating a temperature change value per hour in an air volume determining unit when the temperature value measured by the temperature sensor is detected as higher than the set specific temperature (X1);
In the second process, when the temperature change value is calculated to be equal to or greater than the reference increase temperature change value ΔX2 within a set time T1 while maintaining the equilibrium range temperature ΔX1, the speed of the hood fan through the hood fan control unit. A third process of raising ;
a fourth process of lowering the air volume when the temperature change value calculated after the third process is calculated to be greater than or equal to the set falling temperature change value (ΔX3) within the set time period (T2); automatic control method. According to claim 1,
The method of automatically controlling a hood fan of a cooking appliance, characterized in that the parallel range temperature (ΔX1) in the second process is a parallel section in which the temperature slowly rises as moisture evaporates as the food is heated. According to claim 2,
In the second process, when the temperature change value per hour maintains the parallel range temperature ΔX1 for a certain period of time, it is determined that the food is cooked by moisture heating,
When the temperature change value per hour does not maintain the parallel range temperature (ΔX1) for a predetermined time, it is determined as a food with a high boiling point using oil. According to claim 3,
When the temperature change value per hour calculated in the second process maintains the parallel range temperature (ΔX1), the hood fan of the cooking appliance is automatically driven at a standard speed selected by the user in the first process. control method. According to claim 3,
In the second process, if the temperature change value per hour exceeds the specific temperature (X1) outside the parallel range temperature (ΔX1) and exceeds the set high-temperature reference temperature (X2), it is determined that the material with low moisture and high boiling point is cooked. and moving to the fourth process after increasing the speed of the hood fan to "strong". According to claim 1,
In the fourth process, when the heat power is reduced by the user during cooking or when water is added and the temperature change of the food is detected to be greater than or equal to the set lowering temperature change value (ΔX3) within a predetermined time (T2), the hood fan operates at the standard air volume. Method for automatically controlling a hood fan of a cooking appliance, characterized in that driven by. According to claim 1,
The method of automatically controlling a hood fan of a cooking appliance, characterized in that the temperature measured by the temperature sensor is the temperature of the food or the cooking vessel. According to claim 1,
The method of automatically controlling a hood fan of a cooking appliance, characterized in that the air volume determination unit is installed in either a cooking appliance or a hood. According to claim 1 or 3,
In the second process, when the temperature change value per hour exceeds the specific temperature (X1) outside the parallel range temperature (ΔX1) and exceeds the overheating temperature (X3) set as the fire occurrence temperature, the heating of the cooking appliance is stopped, , The hood fan automatic control method of the cooking appliance, characterized in that the speed of the hood fan is increased to “strong” and then moved to the fourth process.

Images