KR102576076B1 - 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. The purpose of the present invention is to automatically control the speed of the hood according to the temperature change of the food or cooking vessel detected by a temperature sensor provided in the cooking appliance.

Description

Method to automatically control range 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 specifically, to an automatic control of a hood fan of a cooking appliance that senses the temperature of the food or cooking vessel during cooking and automatically controls the speed of the hood according to temperature changes. It's about method.

In general, cooking appliances are gas or electric ranges, and are equipped with a range hood at the top to absorb odors, heat, and harmful gases 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 an exhaust pipe for discharging air sucked by the fan to the outside.

In this range hood, the user determines the cooking state and odor of the food and operates the provided switch to adjust the fan rotation speed of the hood.

There are limitations in applying this driving method to various ventilation conditions, so in the past, a range hood system and its control method that allow the exhaust fan to rotate differentially according to the ambient temperature, etc., were published in Domestic Patent Registration No. 10-1439252 ( It was disclosed on September 11, 2014 (announcement date).

1 is a flowchart of a range hood control method according to the prior art, comprising the steps of a control unit rotating a drive motor according to a detection value of a sensor; A control unit determining whether the detection value of the sensor corresponds to a stopped state of the driving motor; If it is not in a stopped state, the control unit operates in conjunction with the storage unit to drive the driving motor in a number corresponding to the detection value of each sensor stored in the storage unit; A control unit determining whether the stop button is on or off while driving; As a result of the determination, if the stop button is pressed for the first time, the control unit temporarily stops the driving motor; Even in a temporary stop state, the control unit monitors whether the detection 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 drive motor and returns to the step of driving the drive motor in a step corresponding to the detection value of the sensor.

This range hood control method according to the prior art temporarily stops the exhaust fan by pressing the stop button once while the exhaust fan is rotating at an appropriate rotation speed according to the detection value detected by the sensor, and in this state, the stop button is pressed. When you press again, the temporary stop mode of the exhaust fan is released and the exhaust fan starts to rotate. 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. It has the advantage of increasing the efficiency of the stop button by allowing the exhaust fan to rotate differentially without having to re-set the rotation speed.

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

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 provides an automatic control hood fan of a cooking appliance that automatically controls the speed of the hood according to the temperature change of the food or cooking vessel detected by a temperature sensor provided in the cooking appliance. The purpose is to provide a method.

A method of automatically controlling a hood fan of a cooking appliance to achieve the purpose of the present invention is a method of automatically controlling a hood fan of a cooking appliance that adjusts the speed of the hood fan according to the result of detecting the temperature measured by a temperature sensor provided in the cooking appliance. The method includes: a first process of driving the hood fan at a standard airflow rate selected by the user by a hood fan control unit as the cooking appliance starts cooking; A second process in which, when the temperature value measured by the temperature sensor is detected to be higher than the set specific temperature ( In the second process, when the temperature change value is calculated to be more than the standard rise temperature change value (ΔX2) within a set time (T1) while maintaining the equilibrium range temperature (ΔX1), the speed of the hood fan is The 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 more than the set falling temperature change value (ΔX3) within the set time (T2).

Here, in the second process, if the temperature change value per hour maintains the parallel range temperature (Δ If it is not maintained for a certain period of time, it is characterized as being judged as a food with a high boiling point using oil.

In addition, in the second process, if the temperature change value per hour above the specific temperature (X1) deviates from the parallel range temperature (ΔX1) and exceeds the set reference temperature ( After making the decision, the speed of the hood fan is increased to “strong” and then the process moves to the fourth process.

The method for automatically controlling the hood fan of a cooking appliance according to the present invention monitors the temperature of the food or cooking vessel during cooking 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 wind speed, but also allows cooking in a quiet and comfortable environment.

1 is a flowchart of a range hood control method according to the prior art;
Figure 2 is a block diagram of an automatic hood fan control device for a cooking appliance for implementing the present invention;
Figure 3 is a flowchart of the automatic control process of the hood fan of the cooking appliance according to an embodiment of the present invention;
Figure 4 is a graph for explaining the hood fan air volume control according to the temperature change of the general food in Figure 3;
FIG. 5 is a diagram illustrating hood fan air volume control according to temperature changes 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 conjunction with the accompanying drawings, and accordingly, those skilled in the art will be able to easily implement the technical idea of the present invention. You will be able to.

Since the present invention can be subject to various changes and can have various forms, specific embodiments will be illustrated and described in detail in the text.

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

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention.

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

Figure 2 is a block diagram of an automatic hood control device for a cooking appliance for implementing the present invention, which includes a temperature sensor 101 attached to the cooking appliance 110 to detect the temperature of the food or 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 determination unit 112 that calculates air volume data, and a first communication unit 113 that outputs the air volume data calculated by the air volume determination unit 112 to a hood 120, and the hood 120 is used for cooking. A second communication unit 121 that receives air volume data transmitted through the first communication unit 113 of the device 110, and a hood fan to generate air volume corresponding to the air volume data input through the second communication unit 121. It consists of a hood fan control unit 123 that controls the speed of 130.

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

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

Figure 3 is a flowchart of the automatic hood control process of a cooking appliance according to an embodiment of the present invention. As shown here, when a user first starts using the cooking appliance and drives the hood fan 130, the hood fan (130) maintains the rotation speed at the standard wind speed. (S11)

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

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

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

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

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

In this section, when general moisture-containing food is heated, water vapor begins to evaporate and maintains equilibrium until the moisture is completely evaporated.

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

In other words, this is a section where the water vapor of the food is completely evaporated and the temperature rises rapidly, and the food may burn or stick. At this time, gases or unpleasant odors harmful to the human body are generated, so stronger ventilation is required.

If the user recognizes the increase in speed of the hood fan 130 through the alarm during cooking and takes action such as reducing the heat power or adding water or other ingredients, the temperature of the food decreases.

As a result of calculating the temperature change of the food input through the temperature input unit 111 within a certain time (T2) in the air volume determination unit 112, if the temperature change is calculated to be higher than the standard falling temperature change value (ΔX3), the hood The rotation speed of the hood fan 130 is lowered through the fan control unit 122. (S23)(S25)

In other words, as the temperature of the food decreases, the strong air volume is determined to be unnecessary and returns to the standard air volume, and the user is alerted to this using a display, buzzer, or voice.

When the user completes cooking and extinguishes the cooking device, the temperature of the food input through the temperature input unit 111 falls below the standard value, and the air volume determination unit 122 detects this, so that the user turns on the hood fan. Even if the stop button is not pressed, the hood fan 130 is stopped through the hood fan control unit 122.

On the other hand, when the food is cooked using oil rather than general cooking containing moisture, the temperature slowly rises to a high temperature of 150°C or higher, unlike cooking using moisture. In other words, cooking using oil generates a lot of oil vapor and generates a unique oil smell, so it operates at a strong wind speed.

With reference to FIG. 5, hood fan control in the case of cooking using oil will be described in more detail as follows.

The measured temperature value of the food measured through the temperature sensor 101 is received from 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 standard temperature (X2) is exceeded, the air volume is increased to drive a “strong” air volume. (S21)

The air volume data determined by the air volume determination unit 112 is input from the hood control unit 122 of the hood 120, and the hood fan 130 is driven to generate a corresponding “strong” wind volume and alerts the user. . (S19)

Meanwhile, if the temperature value measured from the temperature sensor 101 exceeds the overheating temperature (X3) set as the fire occurrence temperature, heating is stopped to prevent fire and remove smoke that may occur in an overheated state. For this purpose, the speed of the hood fan is controlled by increasing it to “high” (S31).

At this time, the overheating temperature (

Additionally, after increasing the speed of the hood fan to “high”, the temperature value measured from the temperature sensor can be maintained until it falls below the overheating temperature (X3) set as the fire occurrence temperature.

The heating power of the hood fan 130 is reduced due to the user reducing the heating power or inputting other materials during a “high” wind speed, and the calculated temperature change is the lowering temperature change value (ΔX3) set within a certain time (T2). ) If an abnormality is detected, the hood fan 130 is operated at a lower air volume to the standard air volume (S23) (S25).

In this way, the air volume determination unit 112 determines whether the food is moist or oily depending on the presence or absence of the equilibrium range temperature ΔX1, determines the air volume accordingly, and drives the hood fan 130 at the corresponding air volume. It is automatically controlled to do so.

As described above, although the method for automatically controlling the hood air volume of a cooking appliance according to an embodiment of the present invention has been described through limited embodiments and drawings, it is not limited to these embodiments and is based on common knowledge in the technical field to which the present invention pertains. Of course, various modifications and variations can be made by those having the same within the technical spirit of the present invention and the equivalent scope of the claims described below.

101: Temperature sensor 110: Cooking appliance
111: Temperature input unit 112: Air volume determination unit
113: First Communication Department 120: Hood
121: Second communication unit 122: Hood fan control unit
130: hood fan

Claims (9)

In the automatic hood fan control method of a cooking appliance that adjusts the speed of the hood fan according to the result of detecting the temperature measured by a temperature sensor provided in the cooking appliance,
A first process of operating the hood fan at a standard airflow rate selected by the user by a hood fan control unit as the cooking appliance starts cooking;
A second process in which, when the temperature value measured by the temperature sensor is detected to be higher than the set specific temperature (
In the second process, if the temperature change value is calculated to be more than the standard rise temperature change value (ΔX2) within a set time (T1) while maintaining the parallel range temperature (ΔX1), the hood fan is controlled through the hood fan control unit. Third process of increasing speed;
A fourth process of lowering the air volume when the temperature change value calculated after the third process is calculated to be more than a set falling temperature change value (ΔX3) within a set time (T2),
In the second process, the parallel range temperature (Δ
In the second process, if the temperature change value per hour maintains the parallel range temperature (Δ
If the temperature change value per hour is not maintained at the parallel range temperature (Δ
In the second process, if the temperature change value per hour above the specific temperature (X1) deviates from the parallel range temperature (ΔX1) and exceeds the high temperature reference temperature (X2) set higher than the specific temperature ( An automatic hood fan control method of a cooking appliance, characterized in that it is judged to be cooking an ingredient with a high boiling point, increases the speed of the hood fan to "high", and then moves to the fourth process. delete delete According to paragraph 1,
An automatic hood fan of a cooking appliance, characterized in that when the temperature change value per hour calculated in the second process maintains the parallel range temperature (ΔX1), the hood fan is driven at a standard speed selected by the user in the first process. Control method. delete According to paragraph 1,
The fourth process is to reduce the heat power by the user during cooking, or when water is added and the temperature change of the food is detected to be greater than the set lowering temperature change value (Δ A method of automatically controlling the hood fan of a cooking appliance, characterized in that it is driven by . According to paragraph 1,
A method for automatically controlling a hood fan of a cooking appliance, wherein the temperature measured by the temperature sensor is the temperature of the food or cooking vessel. According to paragraph 1,
A method for automatically controlling a hood fan of a cooking appliance, wherein the air volume determination unit is installed in either the cooking appliance or the hood. According to paragraph 1,
In the second process, if the temperature change value per hour above the specific temperature (X1) deviates from the parallel range temperature (Δ , A method of automatically controlling the hood fan of a cooking appliance, characterized in that the speed of the hood fan is increased to “high” and then moved to the fourth process.