JP2020008187A - Range hood - Google Patents

Abstract

To provide a range hood which can improve capture efficiency of lamp black while changing the air amount and the rotational frequency of a filter, and which can also reduce noise.SOLUTION: A range hood includes: a temperature sensor 300 for detecting a top surface temperature of a cooker; an exhaust fan 116 for sucking lamp black from the cooker and exhausting it to the outside; a filter 118 for removing oil content from the lamp black sucked by the exhaust fan 116; and a control part 136 for changing the air amount of the exhaust fan 116 and the rotational frequency of the filter 118 in a stepwise manner according to the top surface temperature detected by the temperature sensor 300. When the control part 136 has received a shift command for changing the air amount of the exhaust fan 116 and the rotational frequency of the filter 118 in a stepwise manner, it controls the air amount of the exhaust fan 116 and the rotational frequency of the filter 118 individually, while changing the air amount of the exhaust fan 116 and the rotational frequency of the filter 118.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a range hood.

  2. Description of the Related Art Conventionally, there is known a range hood in which a top surface temperature of a cooking appliance is detected by a temperature sensor provided in the range hood, and the air volume of the range hood is controlled based on the detected temperature (Patent Document 1). Further, there is also known a range hood provided with a filter that can rotate simultaneously with the exhaust fan, and that changes the rotation of the filter at the same time when the air volume of the exhaust fan changes (Patent Document 2).

JP 2009-121751 A Patent No. 5684106

  If the techniques described in Patent Documents 1 and 2 are used, a range hood that changes the air volume and the rotation speed of the filter using the top surface temperature detected by the temperature sensor can be provided. However, the inventor has found that simply linking the air volume with the rotation speed of the filter may cause problems in collecting oil smoke and noise.

  In other words, the inventor does not merely link the air volume and the rotation speed of the filter, but controls the relationship between the air volume and the rotation speed of the filter while changing the air volume and the rotation speed of the filter. It was thought that it would be possible to improve the suction of oil, improve the separation of oil from oil smoke, and reduce the noise.

  Therefore, the present invention improves the suction of oil smoke while changing the air volume and the number of revolutions of the filter, and can improve the separation of oil from the oil smoke, and also reduces noise. The purpose is to provide a range hood.

  A range hood according to the present invention for achieving the above object has a temperature sensor for detecting a top surface temperature of a cooking appliance, an exhaust fan for sucking oil smoke from the cooking appliance and exhausting the smoke to the outside, and an oil fan sucked by the exhaust fan. A filter that removes oil, and a control unit that changes the air flow rate of the exhaust fan and the rotation speed of the filter in a stepwise manner according to the top surface temperature detected by the temperature sensor. When a transition command for changing the rotation speed of the filter in a stepwise manner is received, the air flow of the exhaust fan and the rotation speed of the filter are individually controlled while changing the airflow of the exhaust fan and the rotation speed of the filter.

  According to the present invention, when the shift command is received, the airflow of the exhaust fan and the rotation speed of the filter are individually controlled while changing the airflow of the exhaust fan and the rotation speed of the filter. By optimizing the control of the rotation speed of the filter, it is possible to improve the suction of the oil smoke, improve the separation of the oil from the oil smoke, and reduce the noise.

It is a front view at the time of installing the range hood of this embodiment in a kitchen. It is a side view at the time of installing the range hood of this embodiment in a kitchen. It is a front view of the operation panel with which the range hood of this embodiment is provided. It is a block diagram of a control system of the range hood of the present embodiment. It is an operation | movement flowchart of the range hood of this embodiment. It is a figure which shows the aspect 1 in the case of increasing the airflow of an exhaust fan and the rotation speed of a filter individually. It is a figure which shows the aspect 2 in the case of increasing the air volume of an exhaust fan and the rotation speed of a filter individually. It is a figure which shows the aspect 3 in the case of increasing the air volume of an exhaust fan and the rotation speed of a filter individually. It is a figure which shows the aspect 4 in the case of increasing the air flow of an exhaust fan and the rotation speed of a filter individually. It is a figure which shows the aspect 5 in the case of increasing the air volume of an exhaust fan and the rotation speed of a filter individually. It is a figure which shows the aspect 6 in the case of increasing the air volume of an exhaust fan and the rotation speed of a filter individually.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to only the following embodiments. Each drawing is exaggerated for convenience of explanation. Therefore, the dimensional ratio of each component in each drawing is different from the actual one. In the drawings, the same elements will be denoted by the same reference symbols, without redundant description in the specification.

(Composition of range hood)
FIG. 1 is a front view when the range hood according to the present embodiment is installed in a kitchen. FIG. 2 is a side view when the range hood according to the present embodiment is installed in a kitchen.

  As shown in FIG. 1 and FIG. 2, the range hood 100 of the present embodiment is installed on a cooker 200. Range hood 100 sucks in odors and oily smokes including odor, smoke, oil, etc. generated during cooking of cooker 200 and exhausts them to the outside. The cooker 200 illustrated has three heat sources 210 (general term for three heat sources) and a grill outlet 220. In this specification, the heat source means a burner for a gas cooker and a heater for an IH cooker.

  Range hood 100 has a temperature sensor 300 for detecting the top surface temperature of cooker 200 on the lower surface on the front side on the left side of the center. The temperature sensor 300 detects the temperature of the area indicated by the dotted line in the figure. The temperature sensor 300 is, for example, a compound eye temperature sensor formed from 64 8 × 8 area sensors. Therefore, temperature sensor 300 can detect the top surface temperature of cooker 200 for each of the 64 regions. In the present embodiment, a compound eye temperature sensor is used, but a monocular temperature sensor may be used.

  Range hood 100 is provided with an exhaust unit 110 at an upper portion thereof. The exhaust unit 110 exhausts odor and oily smoke from the cooking device 200. The exhaust part 110 is provided with an intake port 112 for sucking oil smoke from the cooking device 200, an exhaust port 114 communicating with the outside, and an oil smoke sucked from the intake port 112 into a passage connecting the intake port 112 and the exhaust port 114 to the exhaust port 114. An exhaust fan 116 for exhausting air is provided. The exhaust fan 116 is driven by a fan motor 117. Between the intake port 112 and the exhaust fan 116, there is provided a filter (disk) 118 for removing oil from the oil smoke sucked from the intake port 112. The filter 118 is driven by a filter motor 119.

  Range hood 100 includes an operation panel 120 for instructing the operation of range hood 100 on an upper front side thereof.

  FIG. 3 is a front view of the operation panel 120 included in the range hood 100 of the present embodiment. The operation panel 120 has an operation switch 121, an air volume switch 122, an automatic air volume switch 123, a timer switch 124, an illumination switch 125, and a constant ventilation switch 126.

  The operation switch 121 is a switch for operating the range hood 100. The air volume switch 122 is a switch for manually switching the air volume of the exhaust fan 116 between low, medium, and high. The air volume automatic switch 123 performs control for automatically switching the mode of the air volume of the exhaust fan 116 and the number of rotations of the filter 118 to an optimal mode according to the top surface temperature of the cooking device 200 detected by the temperature sensor 300. Switch. The timer switch 124 is a switch for setting the time for rotating the exhaust fan 116 after cooking is completed. The lighting switch 125 is a switch for turning on / off an LED bulb that illuminates the upper surface of the cooking device 200. The constant ventilation switch 126 is a switch for operating / stopping the constant ventilation by rotating / stopping the exhaust fan 116 manually.

  FIG. 4 is a block diagram of a control system of the range hood 100 of the present embodiment. Range hood 100 has exhaust fan 116, fan motor 117, filter 118, filter motor 119, operation panel 120, control device 130, and temperature sensor 300.

  The exhaust fan 116, the fan motor 117, the filter 118, the filter motor 119, the operation panel 120, and the temperature sensor 300 are as described above. Control device 130 is incorporated in range hood 100.

  The control device 130 includes a gas / IH selection switch 132, a threshold temperature storage unit 134, and a control unit 136. The gas / IH selection switch 132 may be provided on the operation panel 120.

  The gas / IH selection switch 132 is a selection switch for selecting whether the type of cooker in the kitchen in which the range hood 100 is installed is a gas cooker or an IH cooker. The gas / IH selection switch 132 is operated by an operator when installing the range hood 100 on the site, or by a user before the use of the range hood 100 is started.

  The threshold temperature storage unit 134 stores a threshold temperature for selecting the air volume of the fan motor 117 and the rotation speed of the filter 118 in association with each area of the top surface temperature detected by the temperature sensor 300. The threshold temperature storage unit 134 stores both the gas threshold temperature used for the gas cooker 200 and the IH threshold temperature used for the IH cooker 200. Regarding the magnitude of the threshold temperature stored in the threshold temperature storage unit 134, the threshold temperature for the IH cooker is smaller than the threshold temperature for the gas cooker. This is because the cooking temperature of the cooking device 200 for IH is lower than the cooking temperature of the cooking device 200 for gas.

  In the present embodiment, as the modes of the air volume of the fan motor 117 and the rotation speed of the filter 118, a first mode in which the air volume of the fan motor 117 is “weak” and the rotation speed of the filter 118 is “low”, And the third mode in which the air flow of the fan motor 117 is “strong” and the rotation speed of the filter 118 is “high”. It has a mode. For this reason, the gas threshold temperature and the IH threshold temperature have a threshold temperature when shifting from the first mode to the second mode and a threshold temperature when shifting from the second mode to the third mode, respectively. .

  The control unit 136 changes the air volume of the exhaust fan 116 and the rotation speed of the filter 118 stepwise according to the top surface temperature detected by the temperature sensor 300. When the control unit 136 receives the shift command for changing the air flow rate of the exhaust fan 116 and the rotation speed of the filter 118 stepwise, the control unit 136 changes the air flow rate of the exhaust fan 116 and the rotation speed of the filter 118 while changing the air flow rate. And the rotation speed of the filter 118 are individually controlled.

(Operation of Control Unit 136)
FIG. 5 is an operation flowchart of the range hood 100 of the present embodiment. This operation flowchart is processed by the control unit 136. This operation flowchart operates when the air volume automatic switch 123 on the operation panel 120 (see FIGS. 3 and 4) is selected. Hereinafter, the operation of the range hood 100 will be described in detail.

  The control unit 136 determines whether the gas / IH selection switch 132 has selected “gas” or “IH” (S100). If “gas” is selected (S100: gas), the control unit 136 compares the threshold temperature stored in the threshold temperature storage unit 134 with the top surface temperature detected by the temperature sensor 300. The gas threshold temperature is selected as the temperature (S110). On the other hand, if “IH” has been selected (S100: IH), the control unit 136 selects an IH threshold temperature (S120).

  As described above, the IH threshold temperature is set to a value lower than the gas threshold temperature. This is because the heating power of the cooking device 200 for IH is smaller than the heating power of the cooking device 200 for gas. When the same threshold temperature is applied to the gas cooker 200 and the IH cooker 200, a large amount of odor and oil smoke are generated in the IH cooker 200 even if the top surface temperature is not as high as that of the gas cooker 200. May occur. By setting the IH threshold temperature to a value lower than the gas threshold temperature, the IH cooker 200 can also discharge odor and oily smoke with an appropriate air volume. That is, the gas cooker 200 and the IH cooker 200 can have the same odor and oil smoke suction and oil removal performance from the oil smoke, and the odor and oil smoke suction and oil removal performance from the oil smoke can be improved. Does not depend on the type of

  Next, the control unit 136 detects the top surface temperature of the cooking appliance 200 by using the compound eye temperature sensor 300. The top surface temperature is detected for each region of cooker 200 (S130). The control unit 136 compares the detected top surface temperature of the cooking device 200 with the gas or IH threshold temperature selected in S100 (S140).

  Next, the control unit 136 selects the air volume of the exhaust fan 116 and the rotation speed of the filter 118 based on the comparison result of S140 (S150). The combination of the air volume of the exhaust fan 116 and the rotation speed of the filter 118 is set as a mode. As described above, three modes from the first mode to the third mode are provided as modes of the air flow rate of the exhaust fan 116 and the rotation speed of the filter 118.

  Next, the control unit 136 determines whether or not there is a shift command for increasing (S160). That is, whether or not there is any one of the transition command from the first mode to the second mode, the transition command from the second mode to the third mode, and the transition command from the first mode to the third mode Judge.

  If there is no increase transition command (S160: NO), the control unit 136 re-executes the processes from S130 to S150, and controls the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the selected mode. On the other hand, if there is an increase transfer command (S160: YES), the air flow of the exhaust fan 116 and the rotation speed of the filter 118 are increased in any of the following modes 1 to 6 (S170).

  Next, the control unit 136 determines whether or not there is a stop signal (S180). If there is no stop signal (S180: NO), the process returns to step S130, and the processes from S130 to S170 are executed again. On the other hand, if there is a stop signal (S180: YES), the operation of range hood 100 is stopped (S190).

(Operation of Aspects 1 to 6)
Next, the operation of the control unit 136 in modes 1 to 6 that is processed in the step of S170 will be described in detail.

<Operation of Mode 1>
In the first mode, when the control unit 136 receives the shift command to the second mode, the control unit 136 increases the airflow of the exhaust fan 116 by a certain time (t2) from the time when the shift command is received, and increases the airflow by one step. (The flow rate of the exhaust fan 116 in the second mode), and the number of rotations of the filter 118 is increased by one step during a time (t1) shorter than a certain time (t2) from the time when the shift command is received. The rotation speed is increased up to the rotation speed in the upper stage (the rotation speed of the filter 118 in the second mode).

  Specifically, in this mode, from the first mode in which the air volume of the exhaust fan 116 is “weak” and the rotation speed of the filter 118 is “low”, the air volume of the exhaust fan 116 is “medium” and the rotation speed of the filter 118 is increased. This is performed when there is an instruction to shift to the “middle” second mode. In the present embodiment, the first mode and the second mode are exemplified. However, when more modes are provided, for example, when there is an instruction to shift from the second mode to the third mode, The present invention can be applied to a case where there is a command to shift from the third mode to the fourth mode.

  FIG. 6 is a diagram illustrating an aspect 1 in a case where the air flow rate of the exhaust fan 116 and the rotation speed of the filter 118 are individually increased. As shown in this figure, before receiving the command to shift to the second mode, the exhaust fan 116 was rotating at the air volume in the first mode and the filter 118 was rotating at the rotation speed of the filter 118 in the first mode. I do. In this state, when a command to shift to the second mode is received, the filter 118 increases to the rotation speed of the filter 118 in the second mode at time t1. On the other hand, the exhaust fan 116 increases to the air volume in the second mode over a time period t2 longer than the time period t1.

  In other words, the rotation speed of the filter 118 reaches the second mode earlier than the airflow of the exhaust fan 116 until the airflow of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode.

  When the top surface temperature of cooker 200 rises, the amount of odor and oily smoke tends to increase. Therefore, by adopting the first aspect, more oil contained in the oil smoke can be removed by the filter 118, and adhesion of the oil smoke to the exhaust fan 116 can be prevented.

<Operation of Mode 2>
In the second aspect, when the control unit 136 receives the shift command to the second mode, the control unit 136 changes the air volume of the exhaust fan 116 to the next higher level for a certain time (t1) from the time when the shift command is received. (The flow rate of the exhaust fan 116 in the second mode), and the number of rotations of the filter 118 is increased by one step (t2) longer than a certain time (t1) after receiving the shift command. The rotation speed is increased up to the rotation speed in the upper stage (the rotation speed of the filter 118 in the second mode).

  This mode is performed, for example, when there is an instruction to shift from the first mode to the second mode, as in the first mode. In the present embodiment, the first mode and the second mode are exemplified. However, when more modes are provided, for example, when there is an instruction to shift from the second mode to the third mode, The present invention can be applied to a case where there is a command to shift from the third mode to the fourth mode.

  FIG. 7 is a diagram illustrating an aspect 2 in a case where the air volume of the exhaust fan 116 and the rotation speed of the filter 118 are individually increased. As shown in this figure, before receiving the command to shift to the second mode, the exhaust fan 116 was rotating at the air volume in the first mode and the filter 118 was rotating at the rotation speed of the filter 118 in the first mode. I do. In this state, when a command to shift to the second mode is received, the exhaust fan 116 increases to the air volume in the second mode at time t1. On the other hand, the filter 118 increases to the rotation speed of the filter 118 in the second mode over the time t2, which is longer than the time t1.

  That is, the air flow of the exhaust fan 116 reaches the second mode earlier than the rotational speed of the filter 118 until the air flow of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode.

  When the top surface temperature of the cooker 200 rises, the thermal power becomes strong, and there is a possibility that contaminated air may increase. Therefore, by adopting the second aspect, it is possible to prevent the contaminated air from diffusing into the room. Further, since the increase in the number of rotations of the exhaust fan 116 ends when the number of rotations of the filter 118 is increasing, generation of noise can be suppressed.

<Operation of Mode 3>
In mode 3, when receiving the shift command to the second mode, control unit 136 changes the air volume of exhaust fan 116 and the rotation speed of filter 118 over the same time (t0) from when the shift command is received. , The air flow and the rotation speed of the next higher stage (the air flow of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode).

  This aspect is performed, for example, when an instruction to shift from the first mode to the second mode is issued, as in the first and second aspects. In the present embodiment, the first mode and the second mode are exemplified. However, when more modes are provided, for example, when there is an instruction to shift from the second mode to the third mode, The present invention can be applied to a case where there is a command to shift from the third mode to the fourth mode.

  FIG. 8 is a diagram illustrating an aspect 3 in a case where the air volume of the exhaust fan 116 and the rotation speed of the filter 118 are individually increased. As shown in this figure, it is assumed that the exhaust fan 116 has been rotating at the air volume in the first mode and the filter 118 has been rotating at the rotation speed of the filter 118 in the first mode before receiving the second mode shift command. In this state, when a command to shift to the second mode is received, the exhaust fan 116 and the filter 118 increase the air volume of the exhaust fan 116 in the second mode and the rotation speed of the filter 118 in the same time t0.

  That is, the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode reach in the same time.

  By adopting the third aspect, since there are few change points in the switching between the air volume of the exhaust fan 116 and the rotation speed of the filter 118, it is possible to suppress the troublesomeness felt by the user.

<Operation of Aspect 4>
In the fourth mode, when the control unit 136 receives the command to shift to the second mode, the control unit 136 changes the air volume of the exhaust fan 116 and the rotation speed of the filter 118 to the next higher air volume and rotation speed (exhaust gas in the second mode). (The flow rate of the fan 116 and the rotation speed of the filter 118), and when receiving the next shift command to the third mode, the flow rate of the exhaust fan 116 and the rotation speed of the filter 118 are further increased by one step. The air flow and the rotation speed (the air flow of the exhaust fan 116 in the third mode and the rotation speed of the filter 118) are increased to the air flow and the rotation speed. From the first mode to the second mode, the flow rate of the exhaust fan 116 and the rate of increase of the rotation speed of the filter 118). Towards the air amount and the rotation speed increasing rate of the (rotation speed increasing rate of the air volume and filter 118 of the second from the mode to the third mode exhaust fan 116) when increased until rotation number is increased.

  In this mode 4, for example, from the first mode in which the air volume of exhaust fan 116 is “weak” and the rotation speed of filter 118 is “low”, the air volume of exhaust fan 116 is “medium” and the rotation speed of filter 118 is “medium”. ), And from the second mode in which the air volume of the exhaust fan 116 is “medium” and the rotation speed of the filter 118 is “medium”, the air volume of the exhaust fan 116 is “strong” and This is performed when there is an instruction to shift to the third mode in which the rotation speed of the filter 118 is “strong”.

  FIG. 9 is a diagram illustrating an aspect 4 in a case where the air flow rate of the exhaust fan 116 and the rotation speed of the filter 118 are individually increased. As shown in this figure, before receiving the command to shift to the second mode, the exhaust fan 116 was rotating at the air volume in the first mode and the filter 118 was rotating at the rotation speed of the filter 118 in the first mode. I do. In this state, when the shift command to the second mode is received, the exhaust fan 116 and the filter 118 increase the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode at times t1 and t2, respectively. Although t1 = t2 in the figure, t1 ≠ t2 may be satisfied. Further, it is assumed that the exhaust fan 116 is rotating at the air flow rate of the exhaust fan 116 in the second mode and the filter 118 is rotating at the rotation speed of the filter 118 in the second mode before receiving the command to shift to the third mode. . In this state, when the shift command to the third mode is received, the exhaust fan 116 and the filter 118 increase the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the third mode at times t3 and t4, respectively. Although t3 = t4 in the figure, t3 ≠ t4 may be satisfied. At this time, the increase rate of the air flow when shifting from the first mode to the second mode and the increase rate of the rotation speed of the filter 118 are respectively determined by the increase rate of the air flow when shifting from the second mode to the third mode and the filter. The rate of increase of the number of rotations of 118 is larger.

  For this reason, by adopting this aspect 4, it is possible to more quickly remove heat and oily smoke generated as the top surface temperature of the cooker 200 increases.

<Operation of Mode 5>
In mode 5, the control unit 136 receives the command to shift to the second mode, and changes the air volume of the exhaust fan 116 and the rotation speed of the filter 118 to the next higher air volume and rotation speed (exhaust fan in the second mode). While the airflow of the exhaust fan 116 and the rotation speed of the filter 118 are further increased, the command to shift to the next third mode is received. Further, the airflow and the rotation speed (the airflow of the exhaust fan 116 and the rotation speed of the filter 118 in the third mode) are further increased directly from the rotation speed by one step.

  FIG. 10 is a diagram illustrating an aspect 5 in a case where the air flow rate of the exhaust fan 116 and the rotation speed of the filter 118 are individually increased. In this embodiment, when a transition command to the third mode is received during the transition from the first mode to the second mode, the transition to the third mode is immediately performed.

  As shown in this figure, before receiving the command to shift to the second mode, the exhaust fan 116 was rotating at the air volume in the first mode and the filter 118 was rotating at the rotation speed of the filter 118 in the first mode. I do. In this state, when a shift command to the second mode is received, the exhaust fan 116 and the filter 118 try to increase the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode. During this time, if the top surface temperature of the cooking device 200 rises rapidly and a shift command to the third mode is received before reaching the air volume of the exhaust fan 116 or the rotation speed of the filter 118 in the second mode, FIG. As shown, instead of waiting for the air volume of the exhaust fan 116 in the second mode or the rotation speed of the filter 118 to be reached, and then shifting to the third mode, the exhaust air is immediately exhausted from the time when the shift command to the third mode is received. The air volume of the fan 116 and the rotation speed of the filter 118 are shifted to the third mode in which the air volume of the exhaust fan 116 is “high” and the rotation speed of the filter 118 is “high”. In FIG. 10, when the shift command of the third mode is received, the rotation speed of the filter 118 has reached the rotation speed of the filter 118 in the second mode, but the air volume of the exhaust fan 116 has reached the air volume in the second mode. Absent. In this mode 5, as shown in the figure, the airflow of the exhaust fan 116 is increased toward the airflow of the exhaust fan 116 in the third mode from the time when the shift command for the third mode is received.

  When the top surface temperature of the cooker 200 rises, the amount of oil smoke generated tends to increase. For this reason, by shifting the filter 118 to the target rotation speed earlier, more oil can be removed from the oil smoke by the filter 118, and the adhesion of oil to the fan can be prevented. In addition, it is possible to prevent the contaminated air from diffusing into the room by shifting the fan to the target rotation speed earlier.

<Operation of mode 6>
In the sixth mode, the control unit 136 receives the command to shift to the second mode, and changes the air volume of the exhaust fan 116 and the rotation speed of the filter 118 to the next higher air volume and rotation speed (the exhaust fan of the second mode). While the airflow of the exhaust fan 116 and the rotation speed of the filter 118 are further increased, the command to shift to the next third mode is received. After increasing the airflow and the rotation speed of the next higher stage from the rotation speed (the airflow of the exhaust fan 116 in the second mode and the rotation speed of the filter 118), the airflow and the rotation speed of the next higher stage (the second (The air volume of the exhaust fan 116 and the rotation speed of the filter 118) in the three modes.

  FIG. 11 is a diagram illustrating an aspect 6 in a case where the air flow rate of the exhaust fan 116 and the rotation speed of the filter 118 are individually increased. In this embodiment, when a transition command to the third mode is received during the transition from the first mode to the second mode, the exhaust fan 116 and the filter 118 wait until the rotation speed of the second mode is reached. From the first mode to the third mode.

  As shown in this figure, it is assumed that the exhaust fan 116 has been rotating at the air volume in the first mode and the filter 118 has been rotating at the rotation speed of the filter 118 in the first mode before the second mode shift command is issued. In this state, when a shift command to the second mode is received, the exhaust fan 116 and the filter 118 try to increase the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode. In the meantime, if the top surface temperature of the cooking device 200 rises rapidly and a command to shift to the third mode is received before the air volume of the exhaust fan 116 in the second mode or the rotation speed of the filter 118 is reached, FIG. As shown, after waiting for the air volume of the exhaust fan 116 and the rotation speed of the filter 118 to reach the second mode, the third mode in which the air volume of the exhaust fan 116 is “high” and the rotation speed of the filter 118 is “high” Move to In FIG. 11, the rotation speed of the filter 118 has reached the rotation speed of the second mode when the shift command of the third mode has been received, but the airflow of the exhaust fan 116 has not reached the airflow of the second mode. In this case, the rotation speed of the filter 118 is maintained at the rotation speed of the filter 118 in the second mode until the air flow of the exhaust fan 116 reaches the air flow in the second mode. When the air volume of the exhaust fan 116 reaches the air volume of the second mode, the air volume of the exhaust fan 116 and the rotation speed of the filter 118 are increased to the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the third mode.

  If a gap occurs between the rotation speed of the exhaust fan 116 and the rotation speed of the filter 118, the following will occur. However, according to the sixth embodiment, these can be avoided.

  If the air volume of the exhaust fan 116 is too large compared to the rotation speed of the filter 118, the oil removal efficiency of the filter 118 decreases. On the other hand, if the air volume of the exhaust fan 116 is too small compared to the rotation speed of the filter 118, the filter 118 is being rotated needlessly, which is not preferable in terms of energy saving.

  As described above, according to the range hood 100 of the present embodiment, by optimizing the manner of increasing the air volume of the exhaust fan 116 and the number of rotations of the filter 118, the suction of the oil smoke is improved, and Oil separation can be improved, and noise can be reduced.

  In the above embodiment, the case where the air volume of the exhaust fan 116 is increased has been described. However, also in the case where the air volume of the exhaust fan 116 is reduced, control applying the above idea may be performed.

  When the range hood 100 is to be automatically operated, a specification may be adopted in which the optimum mode is selected from all the modes and the air flow is changed, or the optimum mode is selected from a specific mode. Then, a specification of changing the air volume may be adopted. For example, in the case of the range hood 100 in which the selection of the exhaust air volume can be selected from three levels of weak, medium, and strong, in the automatic operation, for example, the mode of two steps of medium, strong, and the like is selected from the mode of three steps of weak, medium, and strong. A specification may be adopted in which the amount of exhaust air is switched between medium and high as a control target, and only manual operation can select low or high.

  In addition, by adopting the above-mentioned modes 1 to 6, since the change point of the switching between the air volume of the exhaust fan 116 and the rotation speed of the filter 118 can be reduced, the troublesomeness felt by the user can be suppressed.

  As described above, the embodiments of the present invention have been described, but the present invention is not limited to the above embodiments, and can be implemented as various forms based on the technical idea described in the claims. Needless to say, they are also within the scope of the present invention.

100 range hood,
110 exhaust part,
112 inlet,
114 exhaust port,
116 exhaust fan,
117 fan motor,
118 filters,
119 filter motor,
120 operation panel,
121 operation switch,
122 air volume switch,
123 air volume automatic switch,
124 timer switch,
125 lighting switch,
126 constant ventilation switch,
130 control device,
132 gas / IH selection switch,
134 threshold temperature storage unit,
136 control unit,
200 cookers,
210 heat sources,
220 grill outlet,
300 temperature sensor.

Claims (8)

A temperature sensor for detecting the top surface temperature of the cooker,
An exhaust fan that inhales oil smoke from the cooker and exhausts it outside,
A filter for removing oil from oily smoke taken by the exhaust fan,
A control unit that changes the air flow rate of the exhaust fan and the rotation speed of the filter stepwise according to a top surface temperature detected by the temperature sensor,
The control unit, when receiving a shift command for changing the air flow rate of the exhaust fan and the rotation speed of the filter in a stepwise manner, while changing the air flow rate of the exhaust fan and the rotation speed of the filter, A range hood for individually controlling the air flow rate and the rotation speed of the filter. further,
A selection switch for selecting whether the type of the cooker is a gas cooker or an IH cooker;
A threshold temperature storage for storing a threshold temperature for a gas cooker and a threshold temperature for an IH cooker smaller than the threshold temperature for the gas cooker for changing the air flow rate of the exhaust fan and the rotation speed of the filter stepwise. And a part,
The control unit compares the top surface temperature detected by the temperature sensor with a threshold temperature for the gas cooker or a threshold temperature for the IH cooker selected by the selection switch, thereby detecting the top temperature detected by the temperature sensor. The range hood according to claim 1, wherein the air volume of the exhaust fan and the number of rotations of the filter are changed stepwise according to a surface temperature.   The control unit, when receiving the shift command to increase the air flow rate of the exhaust fan and the rotation speed of the filter, changes the air flow rate of the exhaust fan to the air flow rate of the exhaust fan and the rotation speed of the filter. Over a certain period of time (t2) from the time when the command is received, the air flow is increased to the next higher level, and the rotation speed of the filter is increased to increase the air volume of the exhaust fan and the rotation speed of the filter. 3. The range hood according to claim 1, wherein the rotation speed is increased up to the rotation speed in the next higher stage during a time period (t <b> 1) shorter than the predetermined time period (t <b> 2) after receiving the command.   The control unit, when receiving the shift command to increase the air flow rate of the exhaust fan and the rotation speed of the filter, changes the air flow rate of the exhaust fan to the air flow rate of the exhaust fan and the rotation speed of the filter. During a certain time (t1) from the time when the command is received, the air flow is increased to the next higher level, and the rotation speed of the filter is increased by increasing the air flow of the exhaust fan and the rotation speed of the filter. 3. The range hood according to claim 1, wherein the range hood is increased to the one-step higher rotational speed over a time period (t <b> 2) longer than the predetermined time period (t <b> 1) after receiving the shift command.   When receiving the shift command to increase the air flow rate of the exhaust fan and the rotation speed of the filter, the control unit sets the air flow rate of the exhaust fan and the rotation speed of the filter to the air flow rate of the exhaust fan and the rotation speed of the filter. 3. The range hood according to claim 1, wherein the range hood is increased to an airflow and a rotation speed of an upper stage over the same time (t0) from when the shift command for increasing the number is received.   The control unit, when receiving the shift command to increase the air volume of the exhaust fan and the rotation speed of the filter, changes the air volume of the exhaust fan and the rotation speed of the filter to the air volume and the rotation speed of the upper stage. When the shift command is received to further increase the air flow rate of the exhaust fan and the rotation speed of the filter, the air flow rate of the exhaust fan and the rotation speed of the filter are further increased. Although it increases to the air volume and the rotation speed, the increase rate of the air volume and the rotation speed when increasing to the air volume and the rotation speed of the upper stage is increased to the air volume and the rotation speed of the further upper stage. The range hood according to any one of claims 1 to 5, wherein the rate of increase in the amount of air and the number of revolutions when the hood is increased are larger.   The control unit receives the shift command to increase the air flow rate of the exhaust fan and the rotation speed of the filter, and changes the air flow rate of the exhaust fan and the rotation speed of the filter to the air flow rate and the rotation speed of the next higher stage. During the increase, when receiving the next airflow of the exhaust fan and the shift command to increase the rotation speed of the filter, the airflow volume of the exhaust fan and the rotation speed of the filter are changed to the current airflow and The range hood according to any one of claims 1 to 5, wherein the range hood is further directly increased from the number of revolutions to the air volume and the number of revolutions of the next higher stage.   The control unit receives the shift command to increase the air flow rate of the exhaust fan and the rotation speed of the filter, and changes the air flow rate of the exhaust fan and the rotation speed of the filter to the air flow rate and the rotation speed of the next higher stage. During the increase, when receiving the next airflow of the exhaust fan and the shift command to increase the rotation speed of the filter, the airflow volume of the exhaust fan and the rotation speed of the filter are changed to the current airflow and The range hood according to any one of claims 1 to 5, wherein the range hood is increased from the rotation speed to the air flow and the rotation speed in the next higher stage, and then further increased to the air flow and the rotation speed in the next higher stage.