CN111561718B

CN111561718B - Fume exhaust fan

Info

Publication number: CN111561718B
Application number: CN202010086585.9A
Authority: CN
Inventors: 山岸智和; 小松晃
Original assignee: Fuji Kogyo Co Ltd
Current assignee: Fuji Kogyo Co Ltd
Priority date: 2019-02-14
Filing date: 2020-02-11
Publication date: 2024-04-09
Anticipated expiration: 2040-02-11
Also published as: CN111561718A

Abstract

The invention relates to a range hood, which does not increase the air quantity and/or the rotation speed of a filter when a cooking utensil leaves a heat source. The range hood comprises: a temperature sensor (300) that detects the temperature above the cooker; the control unit (130) controls the air volume of the fan (116) and/or the rotational speed of the filter (118) based on the temperature detected by the temperature sensor (300), and when it is determined that the cooking appliance has left the heat source of the cooking appliance based on the detection result of the temperature sensor (300), the control unit (130) does not increase the air volume of the fan (116) or/and the rotational speed of the filter (118).

Description

Fume exhaust fan

Technical Field

The invention relates to a range hood.

Background

Conventionally, there is a range hood that detects a temperature above a cooker by a temperature sensor attached to the range hood, and determines an air volume of a fan and/or a rotation speed of a filter based on the detected temperature to automatically operate the range hood (patent document 1).

Patent document 1: japanese patent application laid-open No. 2018-105568

In the conventional range hood as in patent document 1, if the temperature of the upper surface of the cooker is low, the range hood is operated with a small air volume of the fan or/and a small rotational speed of the filter, and if the temperature of the upper surface of the cooker is high, the range hood is operated with a large air volume of the fan or/and a large rotational speed of the filter. In cooking using a cooking device such as a pan or a pot, a dish may be held close to a dish by holding the cooking device in a hand in order to hold the dish after the completion of cooking.

In this case, when the cooking device leaves the cooker, the heat source (a burner or a flame stay located near the burner in the case of a gas cooker, or a heater in the case of an IH cooker) is exposed, and the temperature sensor detects the exposed high-temperature heat source. In such a case, the conventional range hood increases the air volume of the fan and/or the rotational speed of the filter.

Therefore, there is a problem in that the user of the range hood feels uncomfortable or uncomfortable due to an increase in the air volume of the fan and/or the rotational speed of the filter, although cooking is completed.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a range hood that does not increase the air volume of a fan and/or the rotational speed of a filter when a cooking appliance is away from a heat source.

The present invention for achieving the above object relates to a range hood having: a temperature sensor for detecting the temperature above the cooker; and a control unit for controlling the air volume of the fan and/or the rotational speed of the filter based on the temperature detected by the temperature sensor, wherein the control unit does not increase the air volume of the fan and/or the rotational speed of the filter when it is determined that the cooking appliance has left the heat source of the cooking appliance based on the detection result of the temperature sensor.

According to the present invention, it is possible to prevent the user of the range hood from being uncomfortable or uncomfortable when the cooking is completed and the air volume of the fan and/or the rotational speed of the filter are increased.

Drawings

Fig. 1 is a front view of a range hood according to embodiment 1 in a kitchen.

Fig. 2 is a side view of the range hood according to embodiment 1 in a kitchen.

Fig. 3 is a front view of an operation panel provided in the range hood according to embodiment 1.

Fig. 4 is a diagram schematically showing a state in which the temperature sensor detects the temperature above the cooker.

Fig. 5 is a block diagram of a control system of the range hood according to embodiment 1.

Fig. 6 is a diagram showing a specific example of the transfer conditions stored in the mode transfer condition storage unit of fig. 5.

Fig. 7 is a flowchart of operations related to control of the air volume of the fan and/or the rotational speed of the filter in the range hood according to embodiment 1.

Fig. 8 is a flowchart of operations related to control of the mode during automatic operation in the range hood according to embodiment 1.

Fig. 9 is a diagram showing a specific example of the transfer condition stored in the mode transfer condition storage unit of fig. 5 in embodiment 2.

Fig. 10 is a diagram showing a specific example of the transfer condition stored in the mode transfer condition storage unit of fig. 5 in embodiment 2.

Fig. 11 is a flowchart of operations related to control of the mode during automatic operation in the range hood according to embodiment 2.

Reference numerals illustrate:

100 … range hood; 110 … exhaust; 112 … air intake; 114 … exhaust port; 116 … fan; 117 … fan motor; 118 … filter; 119 … filter motor; 120 … operator panel; 121 … run switch; 122 … air volume switch; 123 … air quantity automatic switch; 124 … timer switch; 125 … lighting switch; 126 … usual ventilation switch; 130 … control part; 135 … threshold temperature storage; 137 … mode transition condition storage unit; 200 … cooker; 210. 210A, 210B, 210C … heat source; 220 … grill outlet; 300 … temperature sensor.

Detailed Description

Hereinafter, embodiment 1 and embodiment 2 of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments 1 and 2. Wherein the drawings are expanded for ease of illustration. Therefore, the dimensional ratios of the respective members in the respective drawings are different from actual ones. In the drawings, the same elements are denoted by the same reference numerals, and repetitive description thereof will be omitted.

Embodiment 1

(Structure of mechanical System of Smoke exhaust ventilator)

Fig. 1 is a front view of a range hood according to embodiment 1 in a kitchen. Fig. 2 is a side view of the range hood according to embodiment 1 in a kitchen.

As shown in fig. 1 and 2, the range hood 100 according to embodiment 1 is provided at an upper portion of the cooker 200. The range hood 100 sucks in odor, oil smoke including smell, smoke, oil, etc., generated at the time of cooking of the cooker 200, and exhausts the odor, oil smoke, etc., to the outside. The illustrated cooker 200 has 3 heat sources 210 (a collective term of 3 heat sources 210A, 210B, 210C described later), and a grill air outlet 220. In the present specification, a heat source of a cooker for gas means a burner and a flame spreader located near the burner, and a heat source of a cooker for IH means a heater.

The range hood 100 has a temperature sensor 300 for detecting the temperature above the cooker 200 on the lower surface of the front surface side on the left side of the center portion thereof. The temperature sensor 300 detects the temperature of an area shown by a dotted line in the drawing. The temperature sensor 300 used in embodiment 1 is, for example, a compound eye temperature sensor having 64 pixels of 8×8 and capable of detecting the temperature of each region corresponding to each pixel. The temperature sensor 300 can detect the temperature above the cooker 200 by dividing it into 64 areas, and can independently detect the temperatures of the 3 heat sources. In embodiment 1, the compound eye temperature sensor is used as the temperature sensor 300, but a single eye temperature sensor may be used. In the case of using the monocular temperature sensors, it is preferable to provide 3 monocular temperature sensors corresponding to the respective heat sources so that the temperatures of the 3 heat sources can be detected independently. In the case of actually performing the equipment, a compound eye temperature sensor is more preferable than a single eye temperature sensor. This is because the detection accuracy of the compound eye temperature sensor is better than that of the single eye temperature sensor. In the case of using the compound eye temperature sensor, it is not limited to the compound eye temperature sensor having 64 pixels of 8×8 as exemplified, but a compound eye temperature sensor having more pixels may be used.

The range hood 100 includes an exhaust portion 110 at an upper portion thereof. The exhaust unit 110 exhausts odor and oil smoke from the cooker 200. The exhaust unit 110 includes an intake port 112 through which the cooking fume from the cooking device 200 is taken in, an exhaust port 114 communicating with the outside, and a fan 116 for exhausting the cooking fume taken in from the intake port 112 into a passage connecting the intake port 112 and the exhaust port 114. The fan 116 is driven by a fan motor 117. A filter (disk) 118 is provided between the air inlet 112 and the fan 116, and the filter 118 rotates to remove oil from the oil smoke sucked from the air inlet 112. The filter 118 is driven by a filter motor 119. Wherein as the fan 116 rotates, the filter 118 also rotates. The range hood 100 may be provided with a fixed (normal) filter that does not rotate, or may be a filter-less range hood. The range hood 100 includes an operation panel 120 on the front surface side for instructing the operation of the range hood 100.

Fig. 3 is a front view of an operation panel 120 included in the range hood 100 according to embodiment 1. The operation panel 120 includes an operation switch 121, an air volume switch 122, an air volume automatic switch 123, a timer switch 124, an illumination switch 125, and a normal ventilation switch 126.

The operation switch 121 is a switch for operating the range hood 100. When the operation switch 121 is pressed, a hood on signal (to a control unit described later) is transmitted, and when the operation switch is pressed again, a hood off signal is transmitted. The air volume switch 122 is a switch for manually switching the air volume of the fan 116 to weak, medium, and strong. The air volume automatic switch 123 is a switch for performing automatic operation for automatically switching the air volume of the fan 116 and the rotational speed of the filter 118 in stages or continuously according to the temperature above the cooker 200 detected by the temperature sensor 300. If the air volume switch 122 is pressed, the automatic operation is released. The timer switch 124 is a switch for setting the time for rotating the fan 116 and the filter 118 after the cooking is completed. The illumination switch 125 is a switch for turning on/off an LED lamp illuminating the upper surface of the cooker 200. The normal ventilation switch 126 is a switch for performing normal ventilation operation and stop by manually rotating and stopping the fan 116.

Fig. 4 is a diagram schematically showing a detection state of the temperature sensor 300 for detecting the temperature above the cooker 200. As described above, since the temperature sensor 300 is mounted on the lower surface of the range hood 100, the temperature above the cooker 200 can be detected in the region covering the heat sources (burners, flame holders located near the burners, or heaters) 210A, 210B, 210C of the cooker 200 and the outlet 220 of the grill. Since the compound eye temperature sensor is used in embodiment 1, the temperatures of the heat sources 210A, 210B, 210C of the cooker 200 are detected as the highest temperatures of the regions corresponding to the heat sources 210A, 210B, 210C respectively, of pixels (Tij (i=1 to 8,j =1 to 8)) divided into, for example, 8×8, 64 as shown in fig. 4. On the other hand, in the case where the temperature sensor 300 is a monocular temperature sensor, since 3 monocular temperature sensors are provided so as to correspond to the heat sources 210A, 210B, and 210C of the cooker 200, respectively, the temperatures above the cooker 200 can be detected for the heat sources 210A, 210B, and 210C of the cooker 200, respectively. Therefore, the range hood 100 can easily determine which heat source 210A, 210B, 210C of the cooker 200 is being used and which heat source the cooking appliance leaves, based on the detection result of the temperature sensor 300.

(Structure of control System of Smoke exhaust ventilator)

Fig. 5 is a block diagram of a control system of the range hood 100 according to embodiment 1. The range hood 100 includes a fan 116, a fan motor 117, a filter 118, a filter motor 119, an operation panel 120, a control unit 130, and a temperature sensor 300. The control unit 130 includes a threshold temperature storage unit 135 and a mode transition condition storage unit 137, and is incorporated in the range hood 100.

The fan 116, the fan motor 117, the filter 118, the filter motor 119, the operation panel 120, and the temperature sensor 300 are configured and function as described above.

The threshold temperature storage unit 135 stores a threshold temperature for changing the air volume of the fan 116 and/or the rotational speed of the filter 118.

When the automatic air volume switch 123 (see fig. 3) of the operation panel 120 is pressed and the range hood 100 is automatically operated, the control unit 130 compares the temperature above the cooker 200 detected by the temperature sensor 300 with the threshold temperature (for the fan) stored in the threshold temperature storage unit 135, and determines the air volume of the fan 116. The control unit 130 compares the temperature above the cooker 200 detected by the temperature sensor 300 with the threshold temperature (for the filter) stored in the threshold temperature storage unit 135, and determines the rotation speed of the filter 118. In the case of a range hood without a filter or a range hood with a fixed filter, which does not include the filter 118, the control unit 130 determines only the air volume of the fan 116.

The mode transition condition storage 137 is provided to determine that the cooking appliance has left the heat sources 210A, 210B, and 210C of the cooking appliance 200, and stores the transition conditions for the respective modes. The transition condition is specifically as shown in fig. 6.

The mode transition condition storage 137 stores transition conditions for transitioning the mode during the automatic operation to any one of the 3 modes, i.e., the normal mode, the steady mode, and the cooking utensil moving mode. Specifically, a transfer condition for transferring from the normal mode to the steady mode, a transfer condition for transferring from the steady mode to the cooking appliance movement mode, a transfer condition for transferring from the steady mode to the normal mode, and a transfer condition for transferring from the cooking appliance movement mode to the normal mode are stored. However, since it is preferable not to directly shift from the cooking appliance movement mode to the steady mode, in embodiment 1, a shift condition for shifting from the cooking appliance movement mode to the steady mode is not stored.

The normal mode is, for example, a mode selected when the temperature rises above a predetermined temperature for a predetermined period of time during the process of preheating the pan or immediately after cooking of food or the like is started by the cooking appliance. When the range hood 100 starts to operate automatically, the normal mode is first selected unconditionally. The normal mode is a mode shifted from the next steady mode or the cooking appliance shift mode.

The steady mode is, for example, a mode selected when the electric kettle is in a steady state during cooking, and the temperature rises or falls within a predetermined temperature range for a certain period of time. The steady mode is shifted from the normal mode only.

For example, when the boiling pot leaves any one of the heat sources 210A, 210B, and 210C of the cooker 200, the cooking appliance transition mode is selected when the temperature corresponding to the heat source increases sharply from the steady temperature, that is, when the temperature increases to a predetermined temperature or higher within a predetermined time. The cooking appliance transfer mode is transferred only from the steady mode.

The transition condition for transition from the normal mode to the steady mode stored in the mode transition condition storage 137 is specifically as follows. In (1), while operating in the normal mode, the temperature of the highest pixel among the plurality of pixels is acquired every T1 seconds, and the temperatures of the highest pixels are added by the amount of T2 seconds. The "T2 second addition" is performed every T1 seconds, and whether or not the measurement of the temperature deviation of "T2 second addition" is satisfied, which is smaller than +k1℃, than the "T2 second addition" before T1 seconds is satisfied for a number of consecutive a times (T3 seconds), and (2) the measurement of the temperature deviation of "T2 second addition" is performed every T1 seconds, and whether or not the temperature deviation satisfies "k2+_t3" is satisfied for a number of consecutive B times (T4 seconds), and the normal mode is shifted to the steady mode when both of the determinations of (1) and (2) are satisfied. In other words, if the rise in temperature within T3 seconds (within a predetermined time period) satisfies +k1 ℃ or higher (a predetermined temperature or higher) and the rise or fall in temperature within T4 seconds (within a predetermined time period) is "k2+_k3+_k3" (within a predetermined temperature range), the normal mode is set, and if the rise or fall is not satisfied, the mode shifts to the steady mode. Note that the predetermined time=constant time, or the predetermined time++constant time. In the present specification, a method of obtaining a temperature deviation from a temperature difference is exemplified as a method of obtaining a temperature deviation. However, as a method for obtaining the temperature deviation, various other methods such as a method for obtaining the temperature deviation from the standard deviation, a method for obtaining the temperature deviation from the average deviation, and the like can be used in addition to the method for obtaining the temperature deviation.

The judgment of (1) is performed to judge whether or not there is no continuous temperature rise and the cooking state is stable. The judgment of (2) is performed to judge whether or not there is no large temperature change and the cooking state is stable.

The transfer conditions stored in the mode transfer condition storage 137 for transferring the mode from the steady mode to the cooking appliance are specifically described below. In the steady-state operation at a non-maximum operation level (for example, in the case where there is a weak, medium, or strong 3 shift in the operation level related to the air volume of the fan 116 and/or the rotational speed of the filter 118), when the "T7 second addition" is higher by a temperature of K4 ℃ or higher than the "T7 second addition" before the T8 second, the mode is shifted from the steady-state mode to the cooking device.

The transition condition is performed to determine whether or not the cooking appliance is removed from any one of the heat sources 210A, 210B, and 210C of the cooker 200 by capturing a sudden temperature rise that is a temperature rise of K4 ℃ or higher (a predetermined temperature or higher) within T8 seconds (during a predetermined time).

The transition condition for transition from the steady mode to the normal mode stored in the mode transition condition storage 137 is specifically described below. In the steady mode operation, the judgment of both (1) and (2) at the time of transition from the normal mode to the steady mode becomes unsatisfactory.

The transition condition is performed in order to determine that the steady mode is not properly maintained when there is a continuous temperature rise or a large temperature change during the automatic operation in the steady mode.

Further, as a transition condition for transition from the steady mode to the normal mode, a determination is made as to whether or not the steady mode is maintained for T5 seconds.

When the cooking device is moved from any one of the heat sources 210A, 210B, 210C of the cooker 200, the air volume of the fan 116 and/or the rotation speed of the filter 118 are not intended to be increased, but the judgment is made to be increased. By setting the time T5 seconds, it is possible to prevent this by not immediately shifting to the normal mode after the end of cooking.

The transition condition stored in the mode transition condition storage 137 for transitioning from the cooking appliance movement mode to the normal mode is specifically described below. In the case where (1) the "T9 second addition" is performed every T10 seconds, (T11 seconds) the "T9 second addition" is satisfied with the threshold temperature of +k5 ℃ or higher than the "T9 second addition" before T10 seconds, that is, whether the rise in temperature within T9 seconds is satisfied with +k5 ℃ or higher, (2) the "T12 second addition" is performed every T13 seconds, the measurement of the temperature deviation is performed, whether the "K6-temperature deviation" or the "temperature deviation K7" is satisfied with the E-time (T14 seconds), that is, whether the rise or fall in temperature within T14 seconds is the "K6-temperature deviation" or the "temperature deviation K7", or not, (3) the temperature of the pixel satisfying the highest temperature among the plurality of pixels is continuously C-time (T6 seconds) the lowest operation level (for example, when the operation level related to the air volume of the fan 116 or/and the rotation speed of the filter 118 is weak, medium and strong and 3-speed), and (4) the operation of the manual cooking utensil moving mode (for example, whether the operation of the automatic cooking utensil moving mode is satisfied (for example, whether the operation of the automatic cooking utensil is shifted (120) or not) is satisfied (normally) and the cooking utensil moving from the mode (fig. 3) or (4) is judged from the mode (1).

The judgment of (1) is performed to judge that the heating cooking is continued when the temperature rise is caught. The judgment of (2) is performed in order to judge that the cooking is continued if there is a variation in the temperature deviation in the case where the cooking is not completed but the cooking utensil is erroneously moved to the cooking utensil transfer mode, for example, before the baked food is turned over. The judgment of (3) is performed in order to judge that the cooking environment is greatly changed. The judgment of (4) is performed so as to give preference to the preference of the user.

The above-described transition conditions stored in the mode transition condition storage 137 are described by introducing specific numerical values for easy understanding, but these numerical values are different from actual ones and are conceptually simple. Therefore, the range hood 100 of the present invention is not limited to use with these values. The times T1, T10, and T13 are shorter than the times T2, T3, T4, T5, T6, T7, T8, T9, T11, T12, and T14. T1, T10, T13 may all be at different times, or the same time may exist among them. (for example, t1=t10+.t13 or all equal), and T2, T3, T4, T5, T6, T7, T8, T9, T11, T12, and T14 may all be different times, or the same time may exist in them. (for example, t2=t3+.t4+.t5=t6 or all the same), the numbers A, B, C, D, E may all be different numbers, and the same number may exist in them. The above-mentioned temperatures K1, K4 and K5 are in the relationship of K1 < K4 and K1. Ltoreq.K5, and K4 and K5 may be the same temperature or different temperatures. K2 and K6, and K3 and K7 may be the same or different.

The control unit 130 compares the temperature detected by the temperature sensor 300 with the threshold temperature stored in the threshold temperature storage unit 135, and controls the air volume of the fan 116 and/or the rotational speed of the filter 118 by changing the rotational speeds of the fan motor 117 and/or the filter motor 119 stepwise or continuously based on the comparison result. In addition, the control unit 130 sets the operation mode of the range hood 100 to the normal mode, the steady mode, and the cooking utensil moving mode based on the detection result of the temperature sensor 300. The control of the setting of these modes and the setting of the air volume of the fan 116 and/or the rotational speed of the filter 118 are performed in the control unit 130 as independent controls, and the control of the setting of the modes is not linked with the control of the fan 116 and/or the filter 118.

The automatic operation mode of the range hood 100 is set to the normal mode, the steady mode, and the cooking utensil moving mode, and the control unit 130 is provided therein only for determining that the cooking utensil is away from the heat sources 210A, 210B, and 210C of the cooking utensil 200. Therefore, in the case of the range hood 100 according to embodiment 1, although the mode is shifted from the normal mode to the steady mode, from the steady mode to the cooking device moving mode, from the cooking device moving mode to the normal mode, and from the steady mode to the normal mode, the air volume of the fan 116 and/or the rotational speed of the filter 118 do not necessarily have to be switched in a coordinated manner. However, the transition to each mode may be linked to the switching of the air volume and/or the rotational speed of the filter 118.

(action of control section 130)

Fig. 7 is a flowchart of operations related to control of the air volume of the fan and/or the rotational speed of the filter in the range hood according to embodiment 1. The operation flow chart is processed by the control unit 130. The operation flow chart is executed when the automatic air volume switch 123 of the operation panel 120 (see fig. 3 and 5) is pressed and the range hood 100 is automatically operated.

The control unit 130 detects the temperature above the cooker 200 by the temperature sensor 300 (S100). Next, the control unit 130 compares the detected temperature above the cooker 200 with the threshold temperature stored in the threshold temperature storage unit 135 (S110). Next, the control unit 130 controls the air volume of the fan 116 and/or the rotational speed of the filter 118 based on the comparison result between the upper temperature of the cooker 200 and the threshold temperature (S120). In this case, the higher the temperature above the cooker 200, the greater the air volume of the fan 116 and/or the rotational speed of the filter 118, and the lower the temperature above the cooker 200, the smaller the air volume of the fan 116 and/or the rotational speed of the filter 118. For example, when the cooked cooking appliance leaves the cooker 200, the heat source of the cooker 200 is exposed, and therefore the temperature sensor 300 detects a rapid increase in temperature above the cooker 200, and the air volume of the fan 116 and/or the rotational speed of the filter 118 rapidly increases after cooking. In embodiment 1, in order to suppress such abrupt rising after the completion of cooking, control of the automatic operation mode shown in fig. 8 is performed.

Fig. 8 is a flowchart of operations related to control of the mode during automatic operation in the range hood according to embodiment 1. This operation flowchart is also processed by the control unit 130, similarly to the operation flowchart of fig. 7. Accordingly, the control unit 130 controls the air volume of the fan 116 and/or the rotational speed of the filter 118 based on the temperature detected by the temperature sensor 300, and sets the following automatic operation mode independently of this.

First, when the automatic air volume switch 123 of the operation panel 120 is pressed to automatically operate the range hood 100, the control unit 130 operates in the normal mode (S200). Next, the control unit 130 compares the detection result of the temperature sensor 300 with the transition condition stored in the mode transition condition storage unit 137, and determines whether or not a determination condition for a mode transition from the normal mode to the steady mode is satisfied (S201).

If the determination condition for the mode improvement is not satisfied (S201: NO), specifically, if the following two determinations are not satisfied: (1) In the normal mode operation, the temperature of the highest pixel among the plurality of pixels is obtained every T1 seconds, and the temperatures of the highest pixels are added by the amount of T2 seconds. This determination of "addition of T2 seconds" is performed every T1 seconds, and the determination that the continuous a number (T3 seconds) is smaller than +k1 ℃ than the "addition of T2 seconds" before T1 seconds, (2) the determination of "addition of T2 seconds" is performed every T1 seconds, and the determination that the temperature deviation is "k2+_t2+_k3" is performed every B number (T4 seconds), the cooking state cannot be said to be stable, and the operation in the normal mode is continued.

On the other hand, if the determination condition for the mode improvement is satisfied (S201: yes), specifically, if the determinations of both (1) and (2) are satisfied, it can be determined that the cooking state is stable, and therefore, the mode is shifted from the normal mode to the steady mode.

When the normal mode is shifted to the steady mode, the control unit 130 proceeds in the steady mode (S202). Next, the control unit 130 compares the detection result of the temperature sensor 300 with the transition condition stored in the mode transition condition storage unit 137, and determines whether or not the transition condition from the steady mode to the cooking utensil moving mode is satisfied (S203).

If the transition condition from the steady mode to the cooking utensil moving mode is not satisfied (S203: NO), specifically, if the "T2 second addition" is greater than the "T2 second addition" before T1 seconds without increasing the temperature by K4 ℃ or more during the non-maximum operation level (for example, weak or medium if the operation level related to the air volume of the fan 116 or/and the rotation speed of the filter 118 is weak or medium if the operation level is weak, medium or strong 3) selected by the operation flowchart of FIG. 7, then, a judgment is made as to whether or not the mode reduction condition is satisfied (S204).

On the other hand, if the transition condition from the steady mode to the cooking appliance movement mode is satisfied (S203: yes), specifically, if the "addition of T7 seconds" is higher by at least K4 ℃ than the "addition of T7 seconds" before T8 seconds during the operation in the steady mode and at the non-maximum operation level, the transition from the steady mode to the cooking appliance movement mode is performed.

The flow rate of the air of the fan 116 and/or the rotation speed of the filter 118 are controlled by the operation flow chart of fig. 7, regardless of whether the operation mode of the range hood 100 is the normal mode, the steady mode, or the cooking utensil moving mode. However, when the operation flow chart of fig. 7 is used, the control unit 130 does not increase the air volume of the fan 116 and/or the rotational speed of the filter 118 by canceling or not receiving an instruction to increase the air volume of the fan 116 and/or the rotational speed of the filter 118, or by not determining an instruction to increase the air volume of the fan 116 and/or the rotational speed of the filter 118, when the operation flow chart of fig. 7 is used. That is, when it is determined from the detection result of the temperature sensor 300 that the cooking appliance has left the heat source of the cooker 200, the control unit 130 does not increase the air volume of the fan 116 and/or the rotation speed of the filter 118. In addition, the number of the elements is not increased but can be reduced.

In the case of embodiment 1, as shown in fig. 4, the cooker 200 includes 3 heat sources 210A, 210B, 210C. In this case, when it is determined that the cooking appliance is separated from 1 heat source (for example, heat source 210A) among the plurality of heat sources 210A, 210B, and 210C of the cooking appliance 200 based on the detection result of the temperature sensor 300 and it is simultaneously determined that the other heat sources (for example, heat sources 210B and 210C) are being used, the control unit 130 does not increase the air volume of the fan 116 and/or the rotational speed of the filter 118 due to the temperature of the 1 heat source (for example, heat source 210A) detected by the temperature sensor 300. Therefore, according to the operation flowchart of fig. 7, the air volume of the fan 116 and/or the rotational speed of the filter 118 are increased or decreased based on the temperature of the other heat sources (for example, the heat sources 210B and 210C).

Returning to the judgment processing in S204, if the mode lowering judgment condition is satisfied (S204: yes), specifically, if both conditions (1) and (2) are not satisfied when the normal mode is shifted to the steady mode during the operation in the steady mode, the cooking state cannot be said to be steady, so that after the operation is maintained in the steady mode for T5 seconds (S205), it is judged whether or not there is an operation to cancel the cooking utensil moving mode manually (S208), and if there is no operation to cancel the cooking utensil moving mode manually (S208: no), the operation is shifted from the steady mode to the normal mode, and the operation is performed in the normal mode (S200).

On the other hand, if the mode decrease determination condition is not satisfied (S204: NO), specifically, if the conditions (1) and (2) are not satisfied when the normal mode is shifted to the steady mode during the steady mode operation, the cooking state can be said to be steady, and thus the steady mode operation is continued (S202).

Then, the control unit 130 determines whether or not the mode lowering determination condition is satisfied (S207). If the mode lowering determination condition (S207: NO) is not satisfied, specifically, if (1) the "T9 second addition" is performed every T10 seconds, if the threshold temperature of +K5deg.C or higher is satisfied for D consecutive times (T11 seconds) as compared with the "T9 second addition" before T10 seconds, (2) the "T12 second addition" is performed every T13 seconds, if the temperature deviation satisfies the "K6. Ltoreq. Temperature deviation" or the "temperature deviation. Ltoreq. K7" for E consecutive times (T14 seconds), or (3) if the temperature of the highest temperature pixel among the plurality of pixels is not satisfied for C consecutive times (T6 seconds), the operation is continued in the S206 mode by determining that the operation of the cooking appliance movement mode is manually canceled (e.g., if the operation panel 120 (see FIG. 3) is pressed during the automatic operation), or if the operation is not satisfied for all of (1), (2), (4).

On the other hand, if the mode lowering determination condition is satisfied (S207: yes), specifically, if any one of the above-described determinations (1) to (4) is satisfied, it is determined whether or not there is an operation to cancel the cooking utensil moving mode manually (S208), and if there is no operation to cancel the cooking utensil moving mode manually (S208: no), the operation is shifted from the cooking utensil moving mode to the normal mode (S200). If there is an operation to cancel the moving mode of the cooking appliance manually (S208: yes), the automatic operation is ended.

After the automatic operation is completed in S208, that is, after the control unit 130 receives a signal to turn off the range hood, the operation of the fan 116 and the filter 118 is continued by the timer, but in this case, the range hood 100 does not increase the air volume of the fan 116 and/or the rotational speed of the filter 118.

When the user presses a range hood off switch (operation switch 121 in fig. 3) provided in the range hood 100, or when the user presses a range hood off switch provided in a remote controller, or when the cooker 200 is turned off (the off switch of the cooker 200 is connected to the control unit 130), a signal indicating that the range hood is off is transmitted to the control unit 130. Similarly, when the user presses the operation switch 121, or when a range hood on switch provided in the remote controller is pressed, or when the cooker 200 is turned on, a range hood on signal is transmitted to the control unit 130.

As described above, in the range hood 100 according to embodiment 1, the detection result of the temperature sensor 300 is compared with the transition condition stored in the mode transition condition storage 137, and the range hood 100 is set to the normal mode at the start of operation, and then the range hood is shifted to the steady mode if the transition condition to the steady mode is reached, and then the range hood is shifted to the cooking appliance if the transition condition to the cooking appliance moving mode is reached. That is, the operation mode of the range hood 100 is shifted in the order of the normal mode, the steady mode, and the cooking utensil moving mode. When the cooking appliance moving mode is changed from the steady mode, the air volume of the fan 116 and/or the rotational speed of the filter 118 are/is not increased.

In the range hood 100 according to embodiment 1, the normal mode is not directly shifted to the cooking utensil moving mode. In addition, the cooking appliance movement mode is not directly shifted to the steady mode. When the condition for switching from the cooking utensil moving mode to the normal mode is satisfied, the cooking utensil moving mode is switched from the cooking utensil moving mode to the normal mode. When the transition condition from the steady mode to the normal mode is satisfied, the transition is made from the steady mode to the normal mode directly.

As described above, according to the range hood 100 of embodiment 1, when it is determined that the cooking appliance has left the heat source based on the detection result of the temperature sensor 300, the air volume of the fan 116 and/or the rotational speed of the filter 118 are not increased. Therefore, it is possible to prevent the user from feeling uncomfortable or uncomfortable due to the increase of the air volume and/or the rotational speed when cooking is completed.

When it is determined that the cooking appliance is away from 1 heat source among the plurality of heat sources of the cooker 200 and it is determined that another heat source is being used, the air volume of the fan 116 and/or the rotation speed of the filter 118 are not increased by the temperature of the 1 heat source detected by the temperature sensor 300. Therefore, even if the cooking of the 1 heat source is completed and the heat source is exposed, if the other heat sources are in the cooking, the air volume and/or the rotation speed of the filter can be increased.

When the range hood 100 is automatically operated in the cooking utensil moving mode, the air volume of the fan 116 and/or the rotational speed of the filter 118 are not increased, and thus the user can be prevented from feeling uncomfortable or uncomfortable while the air volume and/or the rotational speed are not increased during the cooking utensil moving mode.

When the mode is switched from the steady mode to the cooking appliance, the abrupt temperature rise is interpreted as exposure of the heat source, so that the user can be prevented from feeling uncomfortable or uncomfortable.

Since the normal mode and the steady mode are provided, and the mode is surely changed from the normal mode to the steady mode and not changed directly from the normal mode to the cooking appliance, a sudden temperature rise at the start of cooking is not erroneously detected as a movement of the cooking appliance in the normal mode. In addition, the air can be exhausted with an appropriate air volume for a sudden temperature rise at the start of cooking.

Since the steady mode is a state in which the temperature rises and falls within a predetermined temperature range for a certain period of time, it is possible to accurately capture whether the cooking state is steady or unstable.

Since the air volume of the fan 116 and/or the rotational speed of the filter 118 are not increased after the signal for turning off the range hood is received, it is possible to prevent the user from feeling uncomfortable or uncomfortable due to the increase in the air volume and/or rotational speed when cooking is completed.

Embodiment 2

Next, embodiment 2 will be described. Embodiment 2 differs from embodiment 1 in that it is possible to more reliably determine that the cooking appliance has been moved away from the heat source than in embodiment 1. Specifically, when the temperature rises by K8 ℃ or higher (when the temperature rises sharply) during T15 seconds, the mode shifts to the cooking utensil movement mode. Further, unlike embodiment 1, the movement to the cooking appliance movement mode can be changed from either the normal mode or the steady mode.

(structure of a mechanical system of the range hood) and (structure of a control system of the range hood) are the same as those of embodiment 1. Further, although the mode transition condition storage 137 of fig. 5 stores transition conditions for transitioning the mode during the automatic operation to any one of the 3 modes of the normal mode, the steady mode, and the cooking utensil moving mode, specifically, transition conditions for transitioning from the normal mode and the steady mode to the cooking utensil moving mode are stored in addition to transition conditions for transitioning from the steady mode to the cooking utensil moving mode, transition conditions for transitioning from the steady mode to the normal mode, and transition conditions for transitioning from the cooking utensil moving mode to the normal mode, unlike embodiment 1. However, since it is preferable that the cooking appliance movement mode is not directly shifted to the steady mode, the shift condition for shifting from the cooking appliance movement mode to the steady mode is not stored in embodiment 1.

Fig. 9 and 10 are diagrams showing specific examples of the transfer conditions stored in the mode transfer condition storage unit of fig. 5 in embodiment 2.

In embodiment 2, the transition condition for transitioning from the normal mode to the steady mode among the mode lifting determination conditions stored in the mode transition condition storage 137 is also the same as in embodiment 1. However, in embodiment 2, a transition condition for transitioning from the normal mode to the cooking appliance movement mode is also stored. As shown in fig. 9, when the temperature rises by K8 ℃ or higher during T15 seconds, the cooking appliance movement mode is shifted from the normal mode. This is because it can be judged whether the cooking appliance is removed from the cooker 200 by capturing a particularly steep temperature rise.

In embodiment 2, the transition condition for transitioning from the steady mode to the cooking utensil moving mode among the mode lifting determination conditions stored in the mode transition condition storage 137 is also the same as embodiment 1. However, in embodiment 2, as shown in fig. 9, even when the temperature rises by K8 ℃ or higher during T15 seconds, the mode shifts from the steady mode to the cooking utensil moving mode. This is because it can be judged whether the cooking appliance is removed from the cooker 200 by capturing a particularly steep temperature rise.

As shown in fig. 9 and 10, the mode-decrease determination conditions stored in the mode-shift-condition storage 137 are the same as those in embodiment 1.

The above-described transition conditions stored in the mode transition condition storage unit 137 are described by introducing specific numerical values for easy understanding, but these numerical values are conceptually simple numerical values different from actual ones. Therefore, the range hood 100 of the present invention is not limited to use with these values. The times T1, T10, T13, and T15 are shorter than the times T2, T3, T4, T5, T6, T7, T8, T9, T11, T12, and T14. T1, T10, T13, T15 may all be at different times, and the same time may also exist among them. (for example, t1=t10+.t13+.t15, all may be equal), and T2, T3, T4, T5, T6, T7, T8, T9, T11, T12, and T14 may all be different times, or the same time may exist in them. (for example, t2=t3+.t4+.t5=t6, or may be all equal.) the above-mentioned times A, B, C, D, E may all be different times, or the same times may exist in them. The above-mentioned temperatures K1, K4, K5 and K8 may be equal to or less than K1 < K4.ltoreq.K8, and K1.ltoreq.K5 < K8, and K4 and K5 may be equal to or different from each other. Among them, K4 > K5 is preferable, that is, K1.ltoreq.K5 < K4.ltoreq.K8 is preferable. It may be more preferable that K1.ltoreq.K5 < K4 < K8, and especially that K8 is 2 times or more of K4. K2 and K6, and K3 and K7 may be the same or different.

As in embodiment 1, the control unit 130 compares the temperature detected by the temperature sensor 300 with the threshold temperature stored in the threshold temperature storage unit 135, and changes the rotational speed of the fan motor 117 and/or the filter motor 119 stepwise or continuously based on the comparison result, thereby controlling the air volume of the fan 116 and/or the rotational speed of the filter 118. In addition, the control unit 130 sets the operation mode of the range hood 100 to the normal mode, the steady mode, and the cooking utensil moving mode based on the detection result of the temperature sensor 300. The control of the setting of these modes and the setting of the air volume of the fan 116 and/or the rotational speed of the filter 118 are performed in the control unit 130 as independent controls, and the control of the setting of the modes is not linked with the control of the fan 116 and/or the filter 118.

The automatic operation mode of the range hood 100 is set to the normal mode, the steady mode, and the cooking utensil moving mode, and the control unit 130 is provided therein only for determining that the cooking utensil is away from the heat sources 210A, 210B, and 210C of the cooking utensil 200. Therefore, in the case of the range hood 100 according to embodiment 2, as in embodiment 1, although the transition from the normal mode to the steady mode, from the steady mode to the cooking utensil moving mode, from the normal mode and the steady mode to the cooking utensil moving mode, from the cooking utensil moving mode to the normal mode, and from the steady mode to the normal mode is performed, the air volume of the fan 116 and/or the rotation speed of the filter 118 do not necessarily have to be changed over in a coordinated manner. However, the transition to each mode may be linked to the switching of the air volume and/or the rotational speed of the filter 118.

(action of control section 130)

The operation flow chart related to the control of the air volume of the fan and/or the rotational speed of the filter in the range hood according to embodiment 2 is the same as that in fig. 7 according to embodiment 1.

Fig. 11 is a flowchart of operations related to control of the mode during automatic operation in the range hood according to embodiment 2. This operation flowchart corresponds to the operation flowchart of fig. 8 in embodiment 1. In this operation flowchart, the difference from the operation flowchart of fig. 8 is that the judgment processing of S201A is provided. The processing of the other steps is similar to that of the steps of the action flow chart of fig. 8.

If the determination condition for the mode improvement is not satisfied (S201: NO), specifically, if (1) the temperature of the highest temperature pixel among the plurality of pixels is obtained every T1 seconds during the normal mode operation, the temperature of the highest temperature pixel is added by a T2-second amount. This determination of "addition of T2 seconds" is performed every T1 seconds, and the determination that the continuous a number of times (T3 seconds) is smaller than +k1 ℃ than the "addition of T2 seconds" before T1 seconds, (2) the determination of "addition of T2 seconds" is performed every T1 seconds, and the determination that the temperature deviation is "K2-temperature deviation-K3" is performed every B number of times (T4 seconds) is performed, so that the cooking state cannot be said to be stable, and the operation in the normal mode is continued.

On the other hand, if the determination condition for the mode improvement is satisfied (S201: yes), specifically, if the determinations of both (1) and (2) are satisfied, it can be determined that the cooking state is stable.

Then, it is determined whether or not the temperature is increased by K8 ℃ or higher at T15 seconds (S201A). If the temperature rises by K8 ℃ or higher for T15 seconds (yes in S201A), the temperature rises rapidly, and therefore, it is determined that the cooking appliance is removed from the cooker 200, and the mode shifts from the normal mode to the cooking appliance moving mode.

On the other hand, if the temperature does not rise by K8 ℃ or higher for T15 seconds (S201A: no), it can be determined that the cooking state is stable, and the normal mode is shifted to the steady mode.

When the normal mode is shifted to the steady mode, the control unit 130 operates in the steady mode (S202). Next, the control unit 130 compares the detection result of the temperature sensor 300 with the transition condition stored in the mode transition condition storage unit 137, and determines whether or not the transition condition from the steady mode to the cooking utensil moving mode is satisfied. In this determination, it is also determined whether or not the temperature has risen by K8 ℃ or higher at T15 seconds (S203).

If the transition condition from the steady mode to the cooking utensil moving mode is not satisfied (S203: NO), specifically, if the "T2 seconds addition" is greater than the "T2 seconds addition" before T1 seconds without increasing the temperature by K4 ℃ or more during the operation of the non-maximum operation level (for example, weak or medium if the operation level related to the air volume of the fan 116 or/and the rotation speed of the filter 118 is weak, medium, or strong 3-speed) selected by the operation flowchart of FIG. 7, then, a judgment is made as to whether or not the mode reduction condition is satisfied (S204).

On the other hand, if the transition condition from the steady mode to the cooking utensil moving mode is satisfied (S203: yes), specifically, when the "addition of T7 seconds" is higher by at least K4 ℃ than the "addition of T7 seconds" before T8 seconds or when the T15 seconds is higher by at least K8 ℃ during the operation at the steady mode and not the maximum operation level, the transition from the steady mode to the cooking utensil moving mode is performed.

The air volume of the fan 116 and/or the rotational speed of the filter 118 are controlled by the operation flowchart of fig. 7 in the same manner as in embodiment 1, regardless of whether the operation mode of the range hood 100 is the normal mode, the steady mode, or the cooking utensil moving mode. However, when the operation flow chart of fig. 7 is used, the control unit 130 does not increase the air volume of the fan 116 and/or the rotational speed of the filter 118 by canceling or not receiving an instruction to increase the air volume of the fan 116 and/or the rotational speed of the filter 118, or by not determining an instruction to increase the air volume of the fan 116 and/or the rotational speed of the filter 118, when the operation flow chart of fig. 7 is used. That is, when it is determined from the detection result of the temperature sensor 300 that the cooking appliance has left the heat source of the cooker 200, the control unit 130 does not increase the air volume of the fan 116 and/or the rotation speed of the filter 118. In addition, the number of the elements is not increased but can be reduced.

As in embodiment 1, as shown in fig. 4, the cooker 200 includes 3 heat sources 210A, 210B, and 210C. In this case, when it is determined that the cooking appliance is separated from 1 heat source (for example, heat source 210A) among the plurality of heat sources 210A, 210B, and 210C of the cooking appliance 200 based on the detection result of the temperature sensor 300 and it is simultaneously determined that the other heat sources (for example, heat sources 210B and 210C) are being used, the control unit 130 does not increase the air volume of the fan 116 and/or the rotational speed of the filter 118 due to the temperature of the 1 heat source (for example, heat source 210A) detected by the temperature sensor 300. Therefore, the increase or decrease in the air volume of the fan 116 and/or the rotation speed of the filter 118 due to the temperature of the other heat sources (e.g., the heat sources 210B and 210C) is performed according to the operation flowchart of fig. 7.

On the other hand, if the mode decrease determination condition is not satisfied (S204: no), specifically, if both conditions (1) and (2) are satisfied when the normal mode is shifted to the steady mode during the steady mode operation, the cooking state can be said to be steady, and thus the operation in the steady mode can be continued (S202).

Then, the control unit 130 determines whether or not the mode lowering determination condition is satisfied (S207). If the mode decrease determination condition (S207: NO) is not satisfied, specifically, if (1) the "T9 second addition" is performed every T10 seconds, if the threshold temperature of +K5deg.C or higher is satisfied for D consecutive times (T11 seconds) as compared with the "T9 second addition" before T10 seconds, (2) the "T12 second addition" is performed every T13 seconds, if the temperature deviation satisfies the "K6. Ltoreq. Temperature deviation" or the "temperature deviation. Ltoreq. K7" for E consecutive times (T14 seconds), and (3) if the temperature of the highest temperature pixel among the plurality of pixels is not satisfied for C consecutive times (T6 seconds), the operation level (for example, if the operation level related to the air volume of the fan 116 or/and the rotation speed of the filter 118 is weak, medium, strong, 3) is not satisfied, and if the operation of the manual cancellation of the cooking appliance movement mode (for example, if the air volume switch 122 of the operation panel 120 (see FIG. 3) is pressed during the automatic operation) is not satisfied, the whole cooking operation mode is continued (S206).

On the other hand, if the mode lowering determination condition is satisfied (S207: yes), specifically, if any one of the above-described determinations (1) to (4) is satisfied, it is determined whether or not there is an operation to cancel the cooking utensil moving mode manually (S208), and if there is no operation to cancel the cooking utensil moving mode manually (S208: no), the operation is performed by shifting from the cooking utensil moving mode to the normal mode (S200). If there is an operation to cancel the moving mode of the cooking appliance manually (S208: yes), the automatic operation is ended.

As described above, in the range hood 100 according to embodiment 1, the detection result of the temperature sensor 300 is compared with the transition condition stored in the mode transition condition storage 137, and the range hood 100 is set to the normal mode at the start of operation, and then the range hood is shifted to the steady mode if the transition condition to the steady mode is reached, and then the range hood is shifted to the cooking appliance if the transition condition to the cooking appliance moving mode is reached. Alternatively, if the condition for switching from the normal mode or the steady mode to the cooking utensil moving mode is satisfied, the cooking utensil moving mode is switched to. That is, the operation mode of the range hood 100 is changed from the normal mode to the steady mode to the cooking utensil moving mode, or from the normal mode to the cooking utensil moving mode to the steady mode to the cooking utensil moving mode. When the cooking appliance moving mode and the steady mode are changed from the normal mode to the cooking appliance moving mode, the air volume of the fan 116 and/or the rotation speed of the filter 118 are not increased.

In the range hood 100 according to embodiment 2, the normal mode may be shifted directly to the cooking utensil moving mode. In addition, the cooking appliance movement mode is not directly shifted to the steady mode. When the condition for switching from the cooking utensil moving mode to the normal mode is satisfied, the cooking utensil moving mode is switched from the cooking utensil moving mode to the normal mode. When the transition condition from the steady mode to the normal mode is satisfied, the transition is made from the steady mode to the normal mode directly.

In addition, in the range hood 100 according to embodiment 2, the following modes are adopted: when the temperature is raised by K8 ℃ or higher during T15 in the normal mode or the steady mode, the mode is shifted to the cooking utensil moving mode, and the air volume of the fan and/or the rotation speed of the filter are not increased. In addition to this, the following method may be adopted: if the temperature rises by K8 ℃ or more in the period of T15, it is determined that the cooking appliance is away from the heat source of the cooking appliance, and the air volume of the fan and/or the rotational speed of the filter are not increased.

As described above, according to the range hood 100 of embodiment 2, when it is determined that the cooking appliance has left the heat source based on the detection result of the temperature sensor 300, the air volume of the fan 116 and/or the rotational speed of the filter 118 are not increased. Therefore, it is possible to more easily prevent the user from feeling uncomfortable or uncomfortable due to an increase in the air volume and/or the rotation speed when cooking is completed than in the range hood 100 of embodiment 1.

While the two embodiments have been described above as embodiments of the present invention, the present invention is not limited to the two embodiments described above, and can be implemented in various modes based on the technical ideas described in the claims, and these modes naturally fall within the scope of the present invention.

Claims

1. A range hood, comprising:

a temperature sensor for detecting the temperature above the cooker; and

a control unit that controls the air volume of a fan and/or the rotational speed of a filter based on the temperature detected by the temperature sensor, wherein the control unit has a cooking appliance movement mode that is a mode in which the air volume of the fan and/or the rotational speed of the filter is not increased based on the detection result of the temperature sensor, and a normal mode and a steady mode that control the air volume of the fan and/or the rotational speed of the filter based on the detection result of the temperature sensor,

the control unit may be configured to shift to the steady mode if the detection result of the temperature sensor in the steady mode satisfies two determinations that the temperature rise in the predetermined time is less than the predetermined temperature and the temperature rise or fall in the predetermined temperature range is within the predetermined time, and shift to the normal mode if the detection result of the temperature sensor in the steady mode does not satisfy two determinations that the temperature rise in the predetermined time is less than the predetermined temperature and the temperature rise or fall in the predetermined temperature range is within the predetermined time, and shift to the cooking utensil moving mode only from the steady mode if it is determined that the cooking utensil leaves the heat source of the cooking utensil based on the detection result of the temperature sensor in the steady mode.

2. A range hood according to claim 1, characterized in that,

when the temperature sensor detects that the temperature rises above a predetermined temperature within a predetermined time, the control unit determines that the cooking appliance is away from the heat source of the cooking appliance.

3. A range hood, comprising:

a temperature sensor for detecting the temperature above the cooker; and

a control part for controlling the air quantity of the fan or/and the rotation speed of the filter according to the temperature detected by the temperature sensor,

the control unit has a cooking appliance movement mode in which the air volume of the fan or/and the rotational speed of the filter is not increased according to a detection result of the temperature sensor, and a normal mode in which the air volume of the fan or/and the rotational speed of the filter is controlled according to a detection result of the temperature sensor,

the control unit may be configured to move to the steady mode if the detection result of the temperature sensor in the steady mode satisfies two determinations that the temperature rise in the predetermined time is less than the predetermined temperature and the temperature rise or fall in the predetermined temperature range is equal to or greater than 1 st temperature rise per unit time in the detection result of the temperature sensor in the predetermined time, and move to the normal mode if the detection result of the temperature sensor in the steady mode does not satisfy two determinations that the temperature rise in the predetermined time is less than the predetermined temperature and the temperature rise or fall in the predetermined temperature range is equal to or greater than 2 nd temperature rise per unit time in the detection result of the temperature sensor in the steady mode is greater than 1 st temperature rise per unit time in the detection result of the temperature sensor in the steady mode, and move to the cooking appliance moving mode.

4. A range hood according to any one of claims 1 to 3, characterized in that,

the cooking appliance moving mode is moved only to the normal mode.

5. A range hood according to any one of claims 1 to 3, characterized in that,

when it is determined that the cooking appliance is away from 1 heat source of the plurality of heat sources of the cooking appliance and it is determined that another heat source is being used at the same time based on the detection result of the temperature sensor, the control unit does not increase the air volume of the fan or/and the rotation speed of the filter due to the temperature of the 1 heat source detected by the temperature sensor.

6. A range hood according to any one of claims 1 to 3, characterized in that,

in the cooking utensil moving mode, the control unit that controls the air volume of the fan or/and the rotational speed of the filter according to the temperature detected by the temperature sensor is canceled from any one of an instruction for the inside of the air volume of the fan or/and the rotational speed of the filter, an acceptance of the instruction, and a judgment of the instruction, and thus the air volume of the fan or/and the rotational speed of the filter is not increased.

7. A range hood according to any one of claims 1 to 3, characterized in that,

the temperature sensor is any one of a compound eye temperature sensor and a single eye temperature sensor.

8. A range hood according to claim 7, characterized in that,

the monocular temperature sensors are provided to correspond to heat sources of the cookers, respectively.

9. A range hood according to any one of claims 1 to 3, characterized in that,

after receiving a signal that the range hood is turned off, the control unit does not increase the air volume of the fan or/and the rotational speed of the filter.