CN110686285A - Smoke exhaust ventilator - Google Patents
Smoke exhaust ventilator Download PDFInfo
- Publication number
- CN110686285A CN110686285A CN201910598536.0A CN201910598536A CN110686285A CN 110686285 A CN110686285 A CN 110686285A CN 201910598536 A CN201910598536 A CN 201910598536A CN 110686285 A CN110686285 A CN 110686285A
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- Prior art keywords
- air volume
- filter
- exhaust fan
- rotation speed
- mode
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- 239000000779 smoke Substances 0.000 title claims abstract description 27
- 238000010411 cooking Methods 0.000 claims abstract description 21
- 239000004071 soot Substances 0.000 claims abstract description 14
- 238000010586 diagram Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 9
- 238000000926 separation method Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2035—Arrangement or mounting of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
Abstract
The invention provides a range hood which can improve the oil smoke collecting efficiency and reduce the noise during the period of changing the air quantity and the rotating speed of a filter. Comprising: a temperature sensor (300) for detecting the temperature of the top surface of the cooking device; an exhaust fan (116) which sucks in the oil smoke from the cooking device and discharges the oil smoke to the outside; a filter (118) for removing oil from the soot sucked by the exhaust fan (116); and a control unit (136) that changes the air volume of the exhaust fan (116) and the rotational speed of the filter (118) in stages according to the ceiling surface temperature detected by the temperature sensor (300), wherein the control unit (136) independently controls the air volume of the exhaust fan (116) and the rotational speed of the filter (118) during the period in which the air volume of the exhaust fan (116) and the rotational speed of the filter (118) are changed when receiving a switching command that changes the air volume of the exhaust fan (116) and the rotational speed of the filter (118) in stages.
Description
Technical Field
The invention relates to a range hood.
Background
Conventionally, a range hood is known which detects a top surface temperature of a cooking device by a temperature sensor provided in the range hood and controls an air volume of the range hood based on the detected temperature (patent document 1). Further, a range hood including a filter that may rotate simultaneously with an exhaust fan is also known, and when the air volume of the exhaust fan is changed, the rotation of the filter is also changed simultaneously (patent document 2).
Patent document 1: japanese laid-open patent publication No. 2009-121751
Patent document 1: japanese patent No. 5684106 Specification
By using the techniques described in patent documents 1 and 2, it is possible to provide a range hood in which the air volume and the rotation speed of the filter are changed by using the ceiling surface temperature detected by the temperature sensor. However, the present inventors found that: there is a concern that problems may occur in the collection of soot and noise by simply linking the air volume and the rotational speed of the filter.
Namely, the present inventors considered: by controlling the relationship between the air volume and the rotational speed of the filter not only in conjunction with the air volume and the rotational speed of the filter but also while the air volume and the rotational speed of the filter are being changed, it is possible to improve the suction of soot and to improve the separation of oil from soot, and to reduce noise.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a range hood capable of improving the suction of soot while changing the air volume and the rotation speed of a filter, improving the separation of oil from soot, and reducing noise.
The range hood of the present invention for achieving the above object has: a temperature sensor for detecting the top surface temperature of the cooking device; an exhaust fan which sucks in oil smoke from the cooking device and discharges the oil smoke to the outside; a filter for removing oil from the oil smoke sucked by the exhaust fan; and a control unit that changes the air volume of the exhaust fan and the rotation speed of the filter in stages according to the top surface temperature detected by the temperature sensor, wherein the control unit controls the air volume of the exhaust fan and the rotation speed of the filter independently while changing the air volume of the exhaust fan and the rotation speed of the filter, when receiving a conversion command that changes the air volume of the exhaust fan and the rotation speed of the filter in stages.
According to the present invention, when the switching command is received, the air volume of the exhaust fan and the rotation speed of the filter are independently controlled while the air volume of the exhaust fan and the rotation speed of the filter are varied, and therefore, the control of the air volume of the exhaust fan and the rotation speed of the filter is optimized, whereby the oil smoke suction can be improved, the separation of oil from the oil smoke can be improved, and the noise can be reduced.
Drawings
Fig. 1 is a front view of a range hood according to the present embodiment installed in a kitchen.
Fig. 2 is a side view of the range hood according to the present embodiment installed in a kitchen.
Fig. 3 is a front view of an operation panel provided in the hood according to the present embodiment.
Fig. 4 is a block diagram of a control system of the range hood according to the present embodiment.
Fig. 5 is an operation flowchart of the hood according to the present embodiment.
Fig. 6 is a diagram showing mode 1 in which the air volume of the exhaust fan and the rotation speed of the filter are independently increased.
Fig. 7 is a diagram showing mode 2 in which the air volume of the exhaust fan and the rotation speed of the filter are independently increased.
Fig. 8 is a diagram showing mode 3 in which the air volume of the exhaust fan and the rotation speed of the filter are independently increased.
Fig. 9 is a diagram showing the mode 4 in which the air volume of the exhaust fan and the rotation speed of the filter are independently increased.
Fig. 10 is a diagram showing the mode 5 in which the air volume of the exhaust fan and the rotation speed of the filter are independently increased.
Fig. 11 is a diagram showing the mode 6 in which the air volume of the exhaust fan and the rotation speed of the filter are independently increased.
Description of the reference numerals
100 … range hood; 110 … exhaust portion; 112 … suction opening; 114 … exhaust port; 116 … exhaust fan; 117 … fan motor; 118 … filter; 119 … filter motor; 120 … operating panel; 121 … operating switch; 122 … air volume switch; 123 … automatic switch of air quantity; 124 … timer switch; 125 … light switch; 126 … constant ventilation switch; 130 … control device; 132 … gas/IH selector switch; 134 … threshold temperature storage; 136 … control section; 200 … cooker; 210 … heat source; an outlet port of a 220 … grill; 300 … temperature sensor.
Detailed Description
Hereinafter, embodiments 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. In addition, the drawings are exaggerated for convenience of explanation. Therefore, the dimensional ratios of the respective constituent elements in the drawings are different from those in reality. In the drawings, the same elements are denoted by the same reference numerals, and redundant description thereof will be omitted in the specification.
(Structure of Smoke exhaust ventilator)
Fig. 1 is a front view of a range hood according to the present embodiment installed in a kitchen. Fig. 2 is a side view of the range hood according to the present embodiment installed in a kitchen.
As shown in fig. 1 and 2, the hood 100 of the present embodiment is provided above the cooker 200. The hood 100 sucks and discharges bad smell including smoke, oil, and the like, generated during cooking in the cooker 200, and oil smoke to the outside. Further, the illustrated cooker 200 has three heat sources 210 (a general term for three heat sources) and a discharge port 220 of a grill. In the present specification, the heat source refers to a burner for a gas cooker and a heater for an IH cooker.
The hood 100 includes an exhaust unit 110 at an upper portion thereof. Exhaust unit 110 exhausts odor and soot from cooking device 200. The exhaust unit 110 includes: an air inlet 112 for sucking oil smoke from the cooking device 200, an air outlet 114 communicating with the outside, and an exhaust fan 116 for discharging the oil smoke sucked from the air inlet 112 to the air outlet 114 in a passage connecting the air inlet 112 and the air outlet 114. The exhaust fan 116 is driven by a fan motor 117. A filter (filter disc) 118 for removing oil from the soot sucked through the air inlet 112 is provided between the air inlet 112 and the exhaust fan 116. The filter 118 is driven by a filter motor 119.
The hood 100 includes an operation panel 120 for instructing an operation of the hood 100 on a front surface side of an upper portion thereof.
Fig. 3 is a front view of the operation panel 120 provided in the hood 100 according to the present embodiment. 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 constant ventilation switch 126.
The operation switch 121 is a switch for operating the hood 100. The air volume switch 122 is a switch for manually switching the air volume of the exhaust fan 116 to weak, medium, or strong. Air volume automatic switch 123 is a switch for automatically switching the mode of the air volume of exhaust fan 116 and the rotation speed of filter 118 to the optimum mode in accordance with the top surface temperature of cooking utensil 200 detected by temperature sensor 300. The timer switch 124 is a switch for setting a 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 illuminating the upper surface of the cooker 200. The constant ventilation switch 126 is a switch for performing the operation/stop of constant ventilation by manually rotating/stopping the exhaust fan 116.
Fig. 4 is a block diagram of a control system of the range hood 100 according to the present embodiment. The hood 100 includes an exhaust fan 116, a fan motor 117, a filter 118, a filter motor 119, an operation panel 120, a control device 130, and a 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. The control device 130 is built in the hood 100.
The control device 130 includes a gas/IH selection switch 132, a threshold temperature storage unit 134, and a control unit 136. In addition, a 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 kind of a cooker of a kitchen in which the hood 100 is provided is a gas cooker or an IH cooker. The gas/IH selection switch 132 is operated by a worker when the hood 100 is installed on the spot or before the hood 100 starts to be used.
The threshold temperature storage unit 134 stores threshold temperatures for selecting the air volume of the fan motor 117 and the rotation speed of the filter 118 for each region of the top surface temperature detected by the temperature sensor 300. Threshold temperature storage unit 134 stores both a threshold temperature for gas used by gas cooker 200 and a threshold temperature for IH used by IH cooker 200. The threshold temperature for the IH cooker is smaller than the threshold temperature for the gas cooker with respect to the magnitude of the threshold temperature stored in the threshold temperature storage unit 134. This is because the cooking temperature of cooker 200 for IH is lower than the cooking temperature of cooker 200 for gas.
In the present embodiment, the fan motor 117 and the filter 118 are provided with: the air volume of the fan motor 117 is "weak" and the rotation speed of the filter 118 is "low", the second mode in which the air volume of the fan motor 117 is "medium" and the rotation speed of the filter 118 is "medium", and the third mode in which the air volume of the fan motor 117 is "strong" and the rotation speed of the filter 118 is "high". Therefore, the threshold temperature for gas and the threshold temperature for IH respectively have a threshold temperature at the time of switching from the first mode to the second mode and a threshold temperature at the time of switching from the second mode to the third mode.
The control unit 136 changes the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in stages according to the ceiling surface temperature detected by the temperature sensor 300. When receiving a switching command for changing the air flow rate of the exhaust fan 116 and the rotation speed of the filter 118 in stages, the control unit 136 controls the air flow rate of the exhaust fan 116 and the rotation speed of the filter 118 independently while changing the air flow rate of the exhaust fan 116 and the rotation speed of the filter 118.
(operation of the control section 136)
Fig. 5 is an operation flowchart of the hood 100 according to the present embodiment. The operation flowchart is processed by the control unit 136. The operation flowchart operates when the airflow rate automatic switch 123 of the operation panel 120 (see fig. 3 and 4) is selected. Hereinafter, the operation of the hood 100 will be described in detail.
The control unit 136 determines which of "gas" and "IH" is selected by the gas/IH selection switch 132 (S100). When "gas" is selected (S100: gas), the controller 136 selects the threshold temperature for gas (S110) as the threshold temperature to be compared with the ceiling surface temperature detected by the temperature sensor 300 among the threshold temperatures stored in the threshold temperature storage 134. On the other hand, if "IH" is selected (S100: IH), the control unit 136 selects the threshold temperature for IH (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 utensil 200 for IH is smaller than the heating power of the cooking utensil 200 for gas. If the same threshold temperature is applied to gas cooker 200 and IH cooker 200, then there are cases where a large amount of odor and smoke are generated in IH cooker 200 even if the top temperature does not rise to the level of gas cooker 200. By setting the IH threshold temperature to a value lower than the gas threshold temperature, the IH cooker 200 can also discharge odor and soot with an appropriate air flow rate. That is, the performance of odor and oil smoke suction and oil smoke removal from gas cooker 200 and IH cooker 200 can be the same, and the performance of odor and oil smoke suction and oil smoke removal from oil smoke does not depend on the type of cooker 200.
Next, the control section 136 detects the top surface temperature of the cooker 200 by the temperature sensor 300 of the compound eye. The top surface temperature is detected for each region of the cooker 200 (S130). Control unit 136 compares the detected top surface temperature of cooking utensil 200 with the threshold temperature for gas or IH 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 in S140 (S150). The combination of the air volume of the exhaust fan 116 and the rotation speed of the filter 118 is set to the mode. As described above, three modes from the first mode to the third mode are provided as the modes of the air volume of the exhaust fan 116 and the rotation speed of the filter 118.
Next, the control unit 136 determines whether or not there is an increased switching command (S160). That is, it is determined whether there is any one of a switch command to switch from the first mode to the second mode, a switch command to switch from the second mode to the third mode, and a switch command to switch from the first mode to the third mode.
If the switching command is not increased (NO in S160), the control unit 136 executes the processing of S130 to S150 again to control the air flow rate 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 increased switching command (YES in S160), the air flow rate 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 a stop signal is present (S180). If the stop signal is not asserted (S180: NO), the process returns to step S130, and the processes from S130 to S170 are executed again. On the other hand, if the stop signal is asserted (YES at S180), the operation of the hood 100 is stopped (S190).
(operation of modes 1 to 6)
Next, the operation of the control unit 136 in the embodiments 1 to 6 in the process in step S170 will be described in detail.
< action of mode 1 >
In the mode 1, when the switching command to the second mode is received, the control unit 136 increases the air volume of the exhaust fan 116 to the air volume in the stage one or more than one stage (the air volume of the exhaust fan 116 in the second mode) after a predetermined time (t2) has elapsed from the time when the switching command is received, and increases the rotation speed of the filter 118 to the rotation speed in the stage one or more than one stage (the rotation speed of the filter 118 in the second mode) for a time (t1) shorter than the predetermined time (t2) from the time when the switching command is received.
Specifically, this mode is performed when there is a switching command to switch from a first mode in which the air volume of the exhaust fan 116 is "weak" and the rotation speed of the filter 118 is "low" to a second mode in which the air volume of the exhaust fan 116 is "medium" and the rotation speed of the filter 118 is "medium". In the present embodiment, the first mode and the second mode are exemplified, but when more modes are provided, the present invention can be applied to a case where there is a switching command to switch from the second mode to the third mode, and a case where there is a switching command to switch from the third mode to the fourth mode.
Fig. 6 is a diagram showing mode 1 in which the air volume of the exhaust fan 116 and the rotation speed of the filter 118 are independently increased. As shown in the figure, before receiving a changeover instruction to the second mode, the exhaust fan 116 is rotated at the air volume of the first mode, and the filter 118 is rotated at the rotation speed of the filter 118 of the first mode. In this state, when a switching command to the second mode is received, the filter 118 increases to the rotation speed of the filter 118 in the second mode within a time t 1. On the other hand, the exhaust fan 116 is increased to the air volume of the second mode over a time t2 which is longer than the time t 1.
That is, until the air volume of the exhaust fan 116 and the rotation speed of the filter 118 reach the second mode, the rotation speed of the filter 118 reaches the second mode earlier than the air volume of the exhaust fan 116.
When the temperature of the top surface of cooking device 200 rises, the amount of odor and smoke generated tends to increase. Therefore, according to the mode 1, more oil contained in the soot can be removed by the filter 118, and the soot can be prevented from adhering to the exhaust fan 116.
< actions of mode 2 >
In the mode 2, when the switching command to switch to the second mode is received, the control unit 136 increases the air volume of the exhaust fan 116 to the air volume of the stage one or more times (the air volume of the exhaust fan 116 in the second mode) for a predetermined time (t1) from when the switching command is received, and increases the rotation speed of the filter 118 to the rotation speed of the stage one or more times (t2) longer than the predetermined time (t1) from when the switching command is received.
This method is performed, for example, in the same manner as the method 1, in the presence of a switch instruction for switching from the first mode to the second mode. In the present embodiment, the first mode and the second mode are exemplified, but when more modes are provided, the present invention can be applied to, for example, a case where there is a switching command to switch from the second mode to the third mode, and a case where there is a switching command to switch from the third mode to the fourth mode.
Fig. 7 is a diagram showing mode 2 in which the air volume of the exhaust fan 116 and the number of rotations of the filter 118 are independently increased. As shown in the figure, before receiving a changeover instruction to the second mode, the exhaust fan 116 is rotated at the air volume of the first mode, and the filter 118 is rotated at the rotation speed of the filter 118 of the first mode. In this state, when a switching command to switch to the second mode is received, the exhaust fan 116 increases the air volume to the second mode for a time t 1. On the other hand, the filter 118 is increased to the rotation speed of the filter 118 in the second mode for a time t2, which is longer than the time t 1.
That is, until the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode are reached, the air volume of the exhaust fan 116 reaches the second mode earlier than the rotation speed of the filter 118.
The fire becomes strong when the temperature of the top surface of the cooker 200 rises, and there is a risk of an increase in polluted air. Therefore, according to the mode 2, the contaminated air can be prevented from being diffused indoors. Further, since the increase in the rotation speed of the exhaust fan 116 is completed when the rotation speed of the filter 118 increases, the generation of noise can be suppressed.
< action of mode 3 >
In the embodiment 3, when the switching command to the second mode is received, the control unit 136 increases the air volume of the exhaust fan 116 and the rotation speed of the filter 118 to the air volume and the rotation speed in one stage or more (the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode) after the same time (t0) elapses from the time when the switching command is received.
This method is performed in the presence of a shift instruction for shifting from the first mode to the second mode, for example, as in the methods 1 and 2. In the present embodiment, the first mode and the second mode are exemplified, but when more modes are provided, the present invention can be applied to a case where there is a switching command to switch from the second mode to the third mode, or a case where there is a switching command to switch from the third mode to the fourth mode, for example.
Fig. 8 is a diagram showing mode 3 in which the air volume of the exhaust fan 116 and the number of rotations of the filter 118 are independently increased. As shown in the figure, before receiving the second mode switching instruction, the exhaust fan 116 is rotated at the air volume of the first mode, and the filter 118 is rotated at the rotation speed of the filter 118 of the first mode. In this state, when a switching command to switch to the second mode is received, the flow rate of the exhaust fan 116 and the rotation speed of the filter 118 are increased to those of the exhaust fan 116 and the filter 118 in the second mode for the same time t 0.
That is, the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode are reached at the same time.
In this aspect 3, the change point of switching between the air volume of the exhaust fan 116 and the rotation speed of the filter 118 is small, and thus the user can be prevented from feeling troublesome.
< action of mode 4 >
In the embodiment 4, the control unit 136 increases the air volume and the rotation speed of the exhaust fan 116 and the rotation speed of the filter 118 to the air volume and the rotation speed in the stage above one step (the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode) when receiving the switching command to switch to the second mode, and further increases the air volume and the rotation speed of the exhaust fan 116 and the rotation speed of the filter 118 to the air volume and the rotation speed in the stage above one step (the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the third mode) when receiving the switching command to switch to the third mode next, but the increase rate of the air volume and the rotation speed when increasing to the air volume and the rotation speed in the stage above one step (the increase rate of the air volume of the exhaust fan 116 and the rotation speed of the filter 118 switched from the second mode to the third mode) is larger than the increase rate of the air volume and the rotation speed in the stage above one step (the air volume and the increase rate of the exhaust fan 116 and the rotation The rate of increase in the rotational speed of the filter 118).
This mode 4 is performed, for example, when there is a switching command to switch from a first mode in which the air volume of the exhaust fan 116 is "weak" and the rotation speed of the filter 118 is "low" to a second mode in which the air volume of the exhaust fan 116 is "medium" and the rotation speed of the filter 118 is "medium", and when there is a switching command to switch from a second mode in which the air volume of the exhaust fan 116 is "medium" and the rotation speed of the filter 118 is "medium" to a third mode in which the air volume of the exhaust fan 116 is "strong" and the rotation speed of the filter 118 is "strong".
Fig. 9 is a diagram showing embodiment 4 in which the air volume of the exhaust fan 116 and the rotation speed of the filter 118 are independently increased. As shown in the figure, before receiving a switching instruction to switch to the second mode, the exhaust fan 116 is rotated at the air volume of the first mode, and the filter 118 is rotated at the rotation speed of the filter 118 of the first mode. In this state, if a switching command to the second mode is received, the exhaust fan 116 and the filter 118 are increased to the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode for times t1 and t2, respectively. In the figure, t1 is t2, but t1 is not equal to t 2. Before receiving a switching command for switching to the third mode, the exhaust fan 116 is rotated at the air volume of the exhaust fan 116 in the second mode, and the filter 118 is rotated at the rotational speed of the filter 118 in the second mode. In this state, if a switching command to the third mode is received, the exhaust fan 116 and the filter 118 increase to the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the third mode for times t3 and t4, respectively. In the figure, t3 is t4, but t3 is not equal to t 4. At this time, the rate of increase in the air volume and the rate of increase in the rotation speed of the filter 118 at the time of switching from the second mode to the third mode are respectively greater than the rate of increase in the air volume and the rate of increase in the rotation speed of the filter 118 at the time of switching from the first mode to the second mode.
Therefore, by adopting the method 4, more heat and soot generated as the temperature of the top surface of the cooker 200 is higher can be removed more quickly.
< action of mode 5 >
In the embodiment 5, the control unit 136 increases the air volume of the exhaust fan 116 and the rotation speed of the filter 118 to the air volume and the rotation speed at the stage above one stage (the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode) when receiving the switching command to switch to the second mode, and further directly increases the air volume of the exhaust fan 116 and the rotation speed of the filter 118 from the current air volume and rotation speed to the air volume and the rotation speed at the stage above one stage (the air volume of the exhaust fan 116 and the rotation speed of the filter 118 in the third mode) when receiving the switching command to switch to the third mode next.
Fig. 10 is a diagram showing embodiment 5 in which the air volume of the exhaust fan 116 and the rotation speed of the filter 118 are independently increased. This mode immediately switches to the transition to the third mode when a transition instruction to transition to the third mode is received in the transition from the first mode to the second mode.
As shown in the figure, before receiving a switching instruction to switch to the second mode, the exhaust fan 116 is rotated at the air volume of the first mode, and the filter 118 is rotated at the rotation speed of the filter 118 of the first mode. In this state, when a switching command to switch to the second mode is received, the flow rate of the exhaust fan 116 and the rotation speed of the filter 118 are increased to those of the exhaust fan 116 and the filter 118 in the second mode. During this period, when the temperature of the top surface of cooking utensil 200 sharply rises and a switching command to the third mode is received before the air volume of exhaust fan 116 or the rotation speed of filter 118 in the second mode is reached, as shown in fig. 10, instead of switching to the third mode after waiting for the air volume of exhaust fan 116 or the rotation speed of filter 118 to reach the second mode, the air volume of exhaust fan 116 and the rotation speed of filter 118 are switched to the third mode in which the air volume of exhaust fan 116 is "strong" and the rotation speed of filter 118 is "strong" immediately from the time when the switching command to the third mode is received. In fig. 10, when the switching command of the third mode is received, the rotation speed of the filter 118 reaches the rotation speed of the filter 118 of the second mode, but the air volume of the exhaust fan 116 does not yet reach the air volume of the second mode. In the embodiment 5, as shown in the drawing, the air volume of the exhaust fan 116 increases from the time when the switching instruction of the third mode is received toward the air volume of the exhaust fan 116 in the third mode.
There is a tendency that the amount of smoke generated increases if the temperature of the top surface of the cooker 200 increases. Therefore, by quickly switching the filter 118 to the target rotation speed, more oil can be removed from the soot by the filter 118, and the oil can be prevented from adhering to the fan. In addition, it is possible to prevent the contaminated air from being diffused indoors by switching the fan to the target rotation speed more quickly.
< action of mode 6 >
In the embodiment 6, when the control unit 136 receives a switching command to switch to the second mode and increases the airflow rate of the exhaust fan 116 and the rotation speed of the filter 118 to the airflow rate and the rotation speed at the stage above one stage (the airflow rate of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode), and further receives a switching command to switch to the third mode next, the control unit increases the airflow rate of the exhaust fan 116 and the rotation speed of the filter 118 from the current airflow rate and rotation speed to the airflow rate and the rotation speed at the stage above one stage (the airflow rate of the exhaust fan 116 and the rotation speed of the filter 118 in the second mode), and then increases the airflow rate and the rotation speed at the stage above one stage (the airflow rate of the exhaust fan 116 and the rotation speed of the filter 118 in the third mode).
Fig. 11 is a diagram showing embodiment 6 in which the air volume of the exhaust fan 116 and the rotation speed of the filter 118 are independently increased. In this mode, when a switching command to the third mode is received during the switching from the first mode to the second mode, the switching to the third mode is performed after the rotation speed of the exhaust fan 116 and the filter 118 reaches the second mode.
As shown in the figure, before the second mode switching command is issued, the exhaust fan 116 is rotated at the air volume in the first mode, and the filter 118 is rotated at the rotation speed of the filter 118 in the first mode. In this state, when a switching command to switch to the second mode is received, the flow rate of the exhaust fan 116 and the rotation speed of the filter 118 are increased to those of the exhaust fan 116 and the filter 118 in the second mode. During this time, when the temperature of the top surface of cooking utensil 200 sharply rises and a switching instruction to the third mode is received before the air volume of exhaust fan 116 or the rotation speed of filter 118 in the second mode is reached, as shown in fig. 11, after waiting for the air volume of exhaust fan 116 and the rotation speed of filter 118 in the second mode to be reached, the mode is switched to the third mode in which the air volume of exhaust fan 116 is "strong" and the rotation speed of filter 118 is "strong". In fig. 11, when the switching command of the third mode is received, the rotation speed of the filter 118 reaches the rotation speed of the second mode, but the air volume of the exhaust fan 116 does not yet reach the air volume 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 volume of the exhaust fan 116 reaches the air volume 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 there is a gap between the rotation speed of the exhaust fan 116 and the rotation speed of the filter 118, the following may occur, but this embodiment 6 can avoid this.
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. 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 unnecessarily rotated, 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 increase of the air volume of the exhaust fan 116 and the rotation speed of the filter 118, the oil smoke can be sucked well, the separation of the oil from the oil smoke can be improved, and the noise can be reduced.
In the above embodiment, the case where the air volume of the exhaust fan 116 is increased has been described, but the control to which the above idea is applied may be performed when the air volume of the exhaust fan 116 is decreased.
When the range hood 100 is automatically operated, the set mode may be a mode in which the air volume is changed by selecting the best mode from all the modes, or a mode in which the air volume is changed by selecting the best mode from a specific mode. For example, in the case of the range hood 100 in which the selection of the exhaust air volume is selected from three stages of weak/medium/strong, the exhaust air volume may be switched between the two stages of medium/strong as a control target in the automatic operation, for example, from the three stages of weak/medium/strong, and the exhaust air volume may be switched between the two stages of medium/strong in the medium/strong mode, so that the exhaust air volume may be selected only in the manual operation.
In addition, by adopting the above-described modes 1 to 6, 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, and therefore, the user can be suppressed from feeling troublesome.
While the embodiments of the present invention have been described above, it is obvious that the present invention is not limited to the above embodiments, and can be implemented in various forms based on the technical ideas described in the claims, and the embodiments also fall within the scope of the present invention.
Claims (8)
1. A range hood, comprising:
a temperature sensor for detecting the top surface temperature of the cooking device;
an exhaust fan which sucks in the oil smoke from the cooking device and discharges the oil smoke to the outside;
a filter for removing oil from the soot sucked by the exhaust fan; and
a control unit for changing the air volume of the exhaust fan and the rotation speed of the filter in stages according to the top surface temperature detected by the temperature sensor,
the control unit, upon receiving a switching command for changing the air volume of the exhaust fan and the rotational speed of the filter in stages, independently controls the air volume of the exhaust fan and the rotational speed of the filter while changing the air volume of the exhaust fan and the rotational speed of the filter.
2. The range hood of claim 1, further comprising:
a selection switch which selects whether the kind of the cooker is a gas cooker or an IH cooker; and
a threshold temperature storage unit for storing a threshold temperature for a gas cooker for changing the air volume of the exhaust fan and the rotation speed of the filter in a stepwise manner and a threshold temperature for an IH cooker smaller than the threshold temperature for the gas cooker,
the control unit compares the ceiling surface temperature detected by the temperature sensor with the threshold temperature for the gas cooker or the threshold temperature for the IH cooker selected by the selection switch, and thereby changes the air volume of the exhaust fan and the rotation speed of the filter in stages in accordance with the ceiling surface temperature detected by the temperature sensor.
3. The range hood of claim 1 or 2, wherein,
the control unit increases the air volume of the exhaust fan to an air volume in one stage or more after a predetermined time (t2) has elapsed from when the switching command for increasing the air volume of the exhaust fan and the rotational speed of the filter is received, and increases the rotational speed of the filter to a rotational speed in one stage or more during a time (t1) shorter than the predetermined time (t2) from when the switching command for increasing the air volume of the exhaust fan and the rotational speed of the filter is received.
4. The range hood of claim 1 or 2, wherein,
the control unit increases the air volume of the exhaust fan to an air volume of a stage one stage above during a predetermined time (t1) from when the switching command for increasing the air volume of the exhaust fan and the rotational speed of the filter is received, and increases the rotational speed of the filter to a rotational speed of a stage one stage above after a time (t2) longer than the predetermined time (t1) elapses from when the switching command for increasing the air volume of the exhaust fan and the rotational speed of the filter is received, when the switching command for increasing the air volume of the exhaust fan and the rotational speed of the filter is received.
5. The range hood of claim 1 or 2, wherein,
the control unit increases the air volume of the exhaust fan and the rotation speed of the filter to the air volume and the rotation speed of one stage after the same time (t0) elapses from the time when the switching command for increasing the air volume of the exhaust fan and the rotation speed of the filter is received.
6. The range hood of any of claims 1-5, wherein,
the control unit increases the air volume of the exhaust fan and the rotation speed of the filter to the air volume and rotation speed of a stage above one stage when receiving the switching command for increasing the air volume of the exhaust fan and the rotation speed of the filter, and further increases the air volume of the exhaust fan and the rotation speed of the filter to the air volume and rotation speed of a stage above one stage when receiving the switching command for increasing the air volume of the exhaust fan and the rotation speed of the filter next time.
7. The range hood of any of claims 1-5, wherein,
the control unit increases the air volume of the exhaust fan and the rotation speed of the filter from the current air volume and rotation speed to the air volume and rotation speed of the stage above one when receiving the switching command for increasing the air volume of the exhaust fan and the rotation speed of the filter and further receiving the switching command for increasing the air volume of the exhaust fan and the rotation speed of the filter next time.
8. The range hood of any of claims 1-5, wherein,
the control unit increases the air volume of the exhaust fan and the rotation speed of the filter from the current air volume and rotation speed to the air volume and rotation speed of the stage above the one stage, and then further increases the air volume and rotation speed of the stage above the one stage, when the control unit further receives the switching command for increasing the air volume of the exhaust fan and the rotation speed of the filter next in the middle of the air volume and rotation speed of the stage above the one stage by receiving the switching command for increasing the air volume of the exhaust fan and the rotation speed of the filter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-127524 | 2018-07-04 | ||
| JP2018127524A JP7137828B2 (en) | 2018-07-04 | 2018-07-04 | Range food |
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| CN110686285A true CN110686285A (en) | 2020-01-14 |
| CN110686285B CN110686285B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910598536.0A Active CN110686285B (en) | 2018-07-04 | 2019-07-04 | Fume exhaust fan |
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| JP (1) | JP7137828B2 (en) |
| CN (1) | CN110686285B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113701213A (en) * | 2020-05-21 | 2021-11-26 | 佛山市顺德区美的电热电器制造有限公司 | Air extraction device, control method, cooking equipment and storage medium |
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|---|---|---|---|---|
| GB2611322A (en) * | 2021-09-29 | 2023-04-05 | Tamworth Corporation Ltd | Ventilation demand control |
| CN114034067B (en) * | 2021-11-12 | 2022-09-16 | 宁波方太厨具有限公司 | Control method of range hood and range hood for implementing same |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP7137828B2 (en) | 2022-09-15 |
| JP2020008187A (en) | 2020-01-16 |
| CN110686285B (en) | 2024-03-26 |
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