Ventilation system

Abstract

The invention provides a ventilation system which does not increase the air volume of a fan and / or the rotation speed of a filter when a cooking utensil leaves a heat source. The ventilation system is provided with a cooking state monitoring unit (300) and a control unit (130). A cooking state monitoring unit (300) monitors a cooking state. The control part (130) controls the operation state of the range hood (100) according to the monitoring result of the cooking state monitoring part (300), and when it is judged that the cooking utensil (250) moves from the heat source (210) according to the monitoring result, the control part (130) does not increase the air volume of a fan of the range hood (100) and / or the rotation speed of a filter.

Description

[0001] This application is filed with the China National Patent Office on March 27, 2020 with application number

[0002] 202010228384.8, divisional application of the application with the invention name “Ventilation System”. Technical Field

[0003] The present invention relates to a ventilation system. Background Art

[0004] Conventionally, there is a range hood that automatically operates by using a temperature sensor mounted on the range hood to detect the temperature above the cooker and to determine the air volume of the fan and / or the rotation speed of the filter according to the detected temperature (Patent Document 1).

[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-105568

[0006] In the conventional range hood such as Patent Document 1, if the temperature above the cooker is low, the range hood is operated with a small fan air volume and / or a small filter rotation speed, and if the temperature above the cooker is high, the range hood is operated with a large fan air volume and / or a large filter rotation speed. When cooking with cooking utensils such as frying pans and pots, in order to serve the food after cooking, the cooking utensils are sometimes held close to the plate to serve the food.

[0007] In this case, when the cooking appliance is removed from the cooker, the heat source (the burner cover or the fire support near the burner in the case of a gas cooker, or the 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 also increases the air volume of the fan and / or the rotation speed of the filter.

[0008] Therefore, there is a problem that the user of the range hood feels uncomfortable or unpleasant because the air volume of the fan and / or the rotation speed of the filter increase even though cooking is finished. Summary of the invention

[0009] In view of the above, an object of the present invention is to provide a ventilation system that does not increase the air volume of a fan and / or the rotation speed of a filter when a cooking appliance is away from a heat source.

[0010] The ventilation system of the present invention for achieving the above-mentioned purpose comprises a cooking state monitoring unit and a control unit. The cooking state monitoring unit monitors the cooking state. The control unit is used to control the operation state of the range hood according to the monitoring result of the cooking state monitoring unit. Specifically, when it is determined according to the monitoring result that the cooking appliance has moved away from the heat source, the control unit sets the air volume of the fan of the range hood and / or the speed of the filter not to increase.

[0011] According to the present invention, it is possible to prevent the user of the range hood from feeling uncomfortable or unpleasant due to an increase in the air volume of the fan and / or the rotation speed of the filter even though cooking is finished. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a front view when the range hoods according to Embodiments 1 to 4 are installed in a kitchen.

[0013] Figure 2 It is a side view when the range hoods according to Embodiments 1 to 4 are installed in a kitchen.

[0014] Figure 3 It is a front view of the operation panel with which the range hoods of Embodiments 1 to 7 are equipped.

[0015] Figure 4 It is a diagram schematically showing a detection state of the temperature above the cooking device by the compound-eye temperature sensor of the range hood according to the first to fourth embodiments.

[0016] Figure 5 This is a block diagram of a control system of the range hood according to the first to fourth embodiments.

[0017] Figure 6 This is a flowchart showing an operation related to control of the air volume of the fan and / or the rotation speed of the filter in the range hoods of Embodiments 1 to 7.

[0018] Figure 7 This is an operation flow chart showing control of the operating state of the range hood according to the first embodiment.

[0019] Figure 8 This is an operation flow chart showing control of the operating state of the range hood according to the second embodiment.

[0020] Fig. 9 This is an operation flow chart showing control of the operating state of the range hood according to the third embodiment.

[0021] Fig.10 This is an operation flow chart showing control of the operating state of the range hood according to the fourth embodiment.

[0022] Fig.11 It is a front view when the range hood of Embodiment 5 is installed in a kitchen.

[0023] Fig.12 It is a diagram schematically showing the arrangement of a cooking state monitoring unit of a range hood according to a fifth embodiment.

[0024] Fig.13 This is a block diagram of a control system of a range hood according to a fifth embodiment.

[0025] Fig.14 This is an operation flow chart showing control of the operating state of the range hood according to the fifth embodiment.

[0026] Fig.15 It is a front view when the range hood of Embodiment 6 is installed in a kitchen.

[0027] Fig.16 This is a block diagram of a control system of a range hood according to a sixth embodiment.

[0028] Fig.17 This is an operation flow chart showing control of the operating state of the range hood according to the sixth embodiment.

[0029] Fig.18 This is an operation flow chart showing control of the operating state of the range hood according to the seventh embodiment.

[0030] Description of reference numerals:

[0031] 100…range hood; 110…main body; 112…air inlet; 114…exhaust outlet; 116…fan; 117…fan motor; 118…filter; 119…filter motor; 120…operation panel; 121…operation switch; 122…air volume switch; 123…automatic air volume switch; 124…timer switch; 125…lighting switch; 126…normal ventilation switch; 130…control unit; 135…threshold temperature storage unit; 140…report unit; 150…receiving unit; 200…cooker; 210, 210A, 210B, 210C…heat source; 220…grill outlet; 230, 230A, 230B, 230C…cooker detection unit; 250…cooker; 260…transmitting unit; 300…compound eye temperature sensor; 400…camera. DETAILED DESCRIPTION

[0032] Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention are described in detail in the following sections, namely, <Implementation 1> to <Implementation 7>. However, the present invention is not limited to the following implementations. In addition, the drawings are exaggerated for the sake of convenience. Therefore, the size ratios of the components in the drawings are different from the actual ones. In addition, the same elements are marked with the same reference numerals in the drawings, and repeated descriptions are omitted in the specification.

[0033] Figure 1 This is a front view of the case where the range hoods of Embodiments 1 to 4 are installed in a kitchen. Figure 2 It is a side view when the range hoods according to Embodiments 1 to 4 are installed in a kitchen.

[0034] (Structure of the mechanical system of the ventilation system)

[0035] like Figure 1 as well as Figure 2 As shown, the range hood 100 of embodiments 1 to 4 is disposed on the upper part of the cooker 200. The range hood 100 sucks in odors and fumes including smells, smoke, oil, etc. generated during cooking in the cooker 200 and exhausts them to the outside. The illustrated cooker 200 has a heat source 210 (a general term for three heat sources 210A, 210B, and 210C described later) for heating a cooking utensil 250 such as a pot or a frying pan, and a grill outlet 220. In this specification, the heat source 210 refers to a burner cap or a fire support located near the burner for a gas cooker, and refers to a heater for an IH cooker.

[0036] The range hood 100 has a compound eye temperature sensor 300 for detecting the temperature above the cooker 200 on the lower surface of the front surface side to the left of the center portion thereof. The compound eye temperature sensor 300 functions as a cooking state monitoring unit for monitoring the cooking state. The compound eye temperature sensor 300 detects the temperature of the area indicated by the dotted line in the figure. The compound eye temperature sensor 300 used in the present embodiment has, for example, 64 pixels of 8×8, and can detect the temperature of the area corresponding to each pixel respectively. The compound eye temperature sensor 300 can be divided into 64 areas to detect the temperature above the cooker 200, and can independently detect the temperature of each of the three heat sources 210A, 210B, and 210C. In addition, in the present embodiment, a compound eye temperature sensor 300 having 64 pixels of 8×8 is illustrated, but a compound eye temperature sensor 300 having fewer pixels or more pixels than this may also be used.

[0037] The range hood 100 includes a main body 110 at its upper portion. The main body 110 exhausts odor and oil smoke from the cooking device 200. The main body 110 includes an air intake port 112 for sucking in oil smoke from the cooking device 200, an exhaust port 114 connected to the outside, and a fan 116 for exhausting the oil smoke sucked in from the air intake port 112 into a passage connecting the air intake port 112 and the exhaust port 114. The fan 116 is driven by a fan motor 117. A filter (disc) 118 is provided between the air intake port 112 and the fan 116, and the filter 118 rotates to remove oil from the oil smoke sucked in from the air intake port 112. The filter 118 is driven by a filter motor 119. In addition, when the fan 116 rotates, the filter 118 also rotates. In addition, the range hood 100 may also include a fixed (ordinary) filter that does not rotate, or may be filterless. The range hood 100 includes an operation panel 120 on the front side for instructing the operation of the range hood 100. The range hood 100 includes a control unit 130 described later therein.

[0038] Figure 3 It is a front view of the operation panel 120 provided in the range hood 100 of Embodiments 1 to 7. The operation panel 120 has an operation switch 121 , an air volume switch 122 , an automatic air volume switch 123 , a timer switch 124 , a lighting switch 125 , and a normal ventilation switch 126 .

[0039] The operation switch 121 is a switch for operating the range hood 100. When the operation switch 121 is pressed, a range hood on signal is sent to the control unit 130, and when it is pressed again, a range hood off signal is sent. 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, which automatically switches the air volume of the fan 116 and the rotation speed of the filter 118 in stages or continuously according to the temperature above the cooker 200 detected by the compound eye temperature sensor 300. In addition, when the air volume switch 122 is pressed, the automatic operation is released. The timer switch 124 is a switch for setting the time for the fan 116 and the filter 118 to rotate after cooking is completed. The lighting switch 125 is a switch for turning on / off the LED light that illuminates the top of the cooker 200. The normal ventilation switch 126 is a switch for manually rotating / stopping the fan 116 to start / stop normal ventilation.

[0040] Figure 4 1 is a diagram schematically showing a detection state of the temperature above the cooker 200 detected by the compound eye temperature sensor 300 of the range hood of embodiments 1 to 4. As described above, since the compound eye temperature sensor 300 is installed on the lower surface of the range hood 100, the temperature above the cooker 200 is detected in the area covering the heat source (burner cover or fire support or heater located near the burner) 210A, 210B, 210C of the cooker 200 and the air outlet 220 of the grill. The temperatures of the heat sources 210A, 210B, 210C of the cooker 200 are detected as shown in FIG. Figure 4 Thus, 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 cooker 250 is away from based on the detection result of the compound eye temperature sensor 300.

[0041] (Structure of the control system of the ventilation system)

[0042] Figure 5This is a block diagram of a control system of the range hood 100 of Embodiments 1 to 4. 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, a notification unit 140, and a compound eye temperature sensor 300. The control unit 130 includes a threshold temperature storage unit 135. In the range hood 100 of Embodiments 1 to 4, the control unit 130 is provided in the range hood 100. In addition, the control unit 130 may be provided in the cooker 200 instead of the range hood 100, or may be provided in both the range hood 100 and the cooker 200 in a dispersed manner.

[0043] The configurations and functions of the fan 116 , the fan motor 117 , the filter 118 , the filter motor 119 , the operation panel 120 , and the compound eye temperature sensor 300 are as described above.

[0044] The threshold temperature storage unit 135 stores a threshold temperature for changing the air volume of the fan 116 and / or the rotation speed of the filter 118 .

[0045] The control unit 130 controls the operating state of the range hood 100 based on the monitoring result of the compound eye temperature sensor 300. Specifically, when the air volume automatic switch 123 of the operation panel 120 is pressed (see Figure 3 ), when the range hood 100 is automatically operated, the temperature above the cooking device 200 detected by the compound eye temperature sensor 300 is compared with the threshold temperature (for the fan) stored in the threshold temperature storage unit 135 to determine the air volume of the fan 116. In addition, the control unit 130 compares the temperature above the cooking device 200 detected by the compound eye temperature sensor 300 with the threshold temperature (for the filter) stored in the threshold temperature storage unit 135 to determine the rotation speed of the filter 118. In addition, in the case of a filterless range hood without the filter 118 or a range hood with a fixed filter, the control unit 130 only determines the air volume of the fan 116.

[0046] In addition, when it is determined based on the monitoring result of the compound eye temperature sensor 300 that the cooking appliance 250 has moved from the heat source 210, the control unit 130 sets the range hood 100 so as not to increase the air volume of the fan 116 and / or the rotation speed of the filter 118. By making such a setting, the control unit 130 can prevent the user from feeling uncomfortable or unpleasant due to the increase in the air volume of the fan 116 and / or the rotation speed of the filter 118 even though cooking is completed. In addition, the movement of the cooking appliance 250 from the heat source 210 can be determined on the range hood side or on the cooker side.

[0047] The notification unit 140 notifies the movement of the cooking appliance 250 from the heat source 210. The notification unit 140 is a sound output unit or a lighting unit, and notifies the movement of the cooking appliance 250 by an alarm sound output from the sound output unit or by lighting or flashing the lighting unit. The sound output unit is a component that outputs sound, such as a speaker or a buzzer, and the lighting unit is an LED lighting unit provided on the operation panel 120, an LED light that illuminates the top of the cooking appliance 200, an LED lighting unit provided on the operation panel of the cooking appliance 200, or the like.

[0048] (Operation of the control unit)

[0049] Figure 6 This is an operation flowchart related to control of the air volume of the fan and / or the rotation speed of the filter in the range hoods of Embodiments 1 to 7. This operation flowchart is processed by the control unit 130 .

[0050] The control unit 130 detects the temperature above the cooker 200 through the compound eye 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 rotation speed of the filter 118 according to the comparison result of the temperature above 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 rotation 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 rotation speed of the filter 118. For example, if the cooking appliance 250 moves from the cooker 200, since the heat source of the cooker 200 is exposed, a part of the compound eye temperature sensor 300 detects a sharp increase in the temperature above the cooker 200, and the air volume of the fan 116 and / or the rotation speed of the filter 118 rises sharply. In this embodiment, in order to prevent the air volume of the fan 116 and / or the rotation speed of the filter 118 from increasing suddenly after the cooking is finished, the control unit 130 performs the control as shown in the following Embodiments 1 to 4.

[0051] <Implementation method 1>

[0052] Figure 7 1 is an action flow chart showing the control of the operating state of the range hood of Embodiment 1. This action flow chart is also processed by the control unit 130. Figure 3 as well as Figure 5) is pressed and the range hood 100 automatically operates. Therefore, the control unit 130 controls the air volume of the fan 116 and / or the speed of the filter 118 according to the temperature detected by the compound eye temperature sensor 300, and on the other hand, controls the subsequent automatic operation independently.

[0053] First, the control unit 130 detects the temperature above the cooking device 200 through the compound eye temperature sensor 300 (S200). Figure 4 As shown, the compound eye temperature sensor 300 can be divided into 64 areas to detect the temperature above the cooker 200. For example, when cooking is performed using the cooking utensil 250 heated by the heat source 210A, the temperature of the area above the heat source 210A is detected as a temperature higher than the temperature of other areas. In addition, for example, when the cooking utensil 250 is moved from the heat source 210A to place the cooked food on a plate after cooking, the temperature of the area above the exposed heat source 210A is detected as a rapidly rising temperature.

[0054] Next, the control unit 130 determines whether the range of the temperature rise detected by the compound eye temperature sensor 300 is above a predetermined temperature and within a predetermined range (S210). When the cooking appliance 250 is moved from the heat source 210A, the temperature of the area above the exposed heat source 210A rises sharply. On the other hand, the temperature of the area above the unexposed heat source 210A does not change substantially. Therefore, in Embodiment 1, when the range of the temperature rise is above a predetermined temperature and within a predetermined range (S210: Yes), it is determined that a portion of the heat source 210A is exposed and the cooking appliance 250 is moved from the heat source 210A, and the air volume of the fan 116 and / or the rotation speed of the filter 118 do not increase (S220). Among them, the setting of not increasing the air volume of the fan 116 of the range hood 100 and / or the rotational speed of the filter 118 made by the control unit 130 is that no signal for increasing the air volume of the fan 116 of the range hood 100 and / or the rotational speed of the filter 118 is sent within the control unit 130, the part of the control unit 130 that controls the air volume of the fan 116 and / or the rotational speed of the filter 118 of the range hood 100 does not receive the signal for increasing them, or even if a signal for increasing them is received, the received signal is canceled.

[0055] On the other hand, if the temperature rise range is not above the predetermined temperature and within the predetermined range (S210: No), it is determined that the cooking appliance 250 has not moved from the heat source 210A. Figure 6 The air volume of the fan 116 and / or the rotation speed of the filter 118 are automatically controlled as shown in the action flowchart (S230).

[0056] In the first embodiment, since the completion of cooking can be detected by the above-described control, it is possible to prevent the air volume of fan 116 and / or the rotation speed of filter 118 from increasing even though cooking is completed, thereby preventing the user from feeling uncomfortable or unpleasant.

[0057] <Implementation method 2>

[0058] Figure 8 1 is an operation flowchart showing the control of the operation state of the range hood according to Embodiment 2. This operation flowchart is also processed by the control unit 130. However, this operation flowchart is also executed when the range hood 100 is automatically operated.

[0059] First, the control unit 130 detects the temperature above the cooking device 200 through the compound temperature sensor 300 (S300).

[0060] Next, the control unit 130 determines whether the temperature difference of each pixel in the range of temperature rise detected by the compound eye temperature sensor 300 has changed to a state within a specific predetermined range (S310). When the temperature of the cooking utensil 250 is different from the temperature of the cooking object, or when the cooking objects are scattered in the cooking utensil 250 (such as cooking), the temperature distribution appears scattered during cooking. However, if the cooking utensil 250 is moved from the heat source 210A, the temperature difference between adjacent pixels becomes smaller (the temperature difference becomes within a specific prescribed range). In addition, when the cooking utensil 250 is moved from the heat source 210A, although the temperature of the area above the exposed heat source 210A rises sharply, after the cooking utensil 250 is completely moved away from the heat source 210A, the temperature difference between the pixels corresponding to the adjacent area disappears and changes to a state within a specific predetermined range. Therefore, in the second embodiment, when the temperature difference of each pixel in the range of temperature rise changes to a state within a specific predetermined range (S310: Yes), it is determined that the heat source 210A is exposed and the cooking appliance 250 has moved from the heat source 210A, and the air volume of the fan 116 and / or the rotation speed of the filter 118 are not increased (S320). In addition, the setting of not increasing the air volume of the fan 116 and / or the rotation speed of the filter 118 of the range hood 100 by the control unit 130 is the same as that in the first embodiment.

[0061] On the other hand, if the temperature difference of each pixel in the temperature rising range does not change to a state within a specific predetermined range (S310: No), it is determined that the cooking appliance 250 has not moved from the heat source 210A. Figure 6 The air volume of the fan 116 and / or the rotation speed of the filter 118 are automatically controlled as shown in the action flowchart (S330).

[0062] In the second embodiment, since the completion of cooking can be detected by the above-described control, it is possible to prevent the air volume of fan 116 and / or the rotation speed of filter 118 from increasing even though cooking is completed, thereby preventing the user from feeling uncomfortable or unpleasant.

[0063] <Implementation method 3>

[0064] Fig. 9 1 is an operation flowchart showing the control of the operating state of the range hood according to Embodiment 3. This operation flowchart is also processed by the control unit 130. However, this operation flowchart is also executed when the range hood 100 is automatically operated.

[0065] First, the control unit 130 detects the temperature above the cooking device 200 through the compound eye temperature sensor 300 (S400).

[0066] Next, the control unit 130 determines whether the temperature rise range detected by the compound eye temperature sensor 300 has moved by more than a predetermined value compared to a predetermined time ago (S410). For example, when cooking food using the cooking utensil 250, if the cooking utensil 250 is moved, the temperature rise range of the cooking utensil 250 and the food gradually shifts in the moving direction. In addition, when the cooking utensil 250 is moved from the heat source 210A, the exposed portion of the heat source 210A increases with the movement of the cooking utensil 250. Therefore, in the third embodiment, when the temperature rise range has moved by more than a predetermined value compared to a predetermined time ago (S410: Yes), it is determined that the cooking utensil 250 has moved from the heat source 210A, and the air volume of the fan 116 and / or the rotation speed of the filter 118 are not increased (S420). Among them, the setting of not increasing the air volume of the fan 116 and / or the rotation speed of the filter 118 of the range hood 100 by the control unit 130 is the same as that of the first embodiment.

[0067] On the other hand, if the temperature rise range has not moved by more than the predetermined value compared with the predetermined time before (S410: No), it is determined that the cooking appliance 250 has not moved from the heat source 210A. Figure 6 The air volume of the fan 116 and / or the rotation speed of the filter 118 are automatically controlled as shown in the action flowchart (S430).

[0068] In the third embodiment, since the completion of cooking can be detected by the above-described control, it is possible to prevent the air volume of fan 116 and / or the rotation speed of filter 118 from increasing even though cooking is completed, thereby preventing the user from feeling uncomfortable or unpleasant.

[0069] <Implementation method 4>

[0070] Fig.101 is an operation flowchart showing the control of the operating state of the range hood according to Embodiment 4. This operation flowchart is also processed by the control unit 130. However, this operation flowchart is also executed when the range hood 100 is automatically operated.

[0071] First, the control unit 130 detects the temperature above the cooking device 200 through the compound eye temperature sensor 300 (S500).

[0072] Next, the control unit 130 determines whether the range of the temperature rise detected by the compound eye temperature sensor 300 is expanded compared to the predetermined time before (S510). The expansion of the range of the temperature rise means that, with respect to the temperature rise range, the cooking utensil 250 and its cooking object are included, and with the movement of the cooking utensil 250, in addition to the cooking utensil 250 and its cooking object, the heat source 210A is exposed. Therefore, when the cooking utensil 250 is moved from the heat source 210A, the exposed portion of the heat source 210A increases with the movement of the cooking utensil 250. Therefore, in the fourth embodiment, when the range of the temperature rise is expanded compared to the predetermined time before (S510: Yes), it is determined that the cooking utensil 250 has moved from the heat source 210A, and the air volume of the fan 116 and / or the rotation speed of the filter 118 are not increased (S520). Among them, the setting of not increasing the air volume of the fan 116 and / or the rotation speed of the filter 118 of the range hood 100 by the control unit 130 is the same as that in the first embodiment.

[0073] On the other hand, if the temperature rise range is not larger than that before the predetermined time (S510: No), it is determined that the cooking appliance 250 has not moved from the heat source 210A. Figure 6 The air volume of the fan 116 and / or the rotation speed of the filter 118 are automatically controlled as shown in the action flowchart (S530).

[0074] In the fourth embodiment, since the completion of cooking can be detected by the above-described control, it is possible to prevent the air volume of fan 116 and / or the rotation speed of filter 118 from increasing even though cooking is completed, thereby preventing the user from feeling uncomfortable or unpleasant.

[0075] In the above, in Embodiments 1 to 4, the following ventilation system is described: the compound eye temperature sensor 300 is used as the cooking state monitoring unit, the temperature of each area detected by the compound eye temperature sensor 300 is used as the monitoring result, and if the temperature distribution of the detected range changes, it is determined that the cooking appliance 250 has moved, and the air volume of the fan 116 and / or the rotation speed of the filter 118 are controlled. Next, the following ventilation system is described as Embodiment 5: the cooking appliance detection unit 230 of the cooking appliance 200 is used as the cooking state monitoring unit, and the detection result of the cooking appliance detection unit 230 is used as the monitoring result, and the air volume of the fan 116 and / or the rotation speed of the filter 118 are controlled.

[0076] <Implementation method 5>

[0077] Fig.11 It is a front view when the range hood of Embodiment 5 is installed in a kitchen. Fig.12 It is a diagram schematically showing the arrangement of a cooking state monitoring unit of a range hood according to a fifth embodiment.

[0078] (Structure of the mechanical system of the ventilation system)

[0079] like Fig.11 As shown, the range hood 100 of the fifth embodiment is installed on the upper part of the cooker 200. The illustrated cooker 200 has three heat sources 210A, 210B, and 210C for heating a cooking utensil 250 such as a pot or a frying pan, and a grill outlet 220. Fig.12 As shown, the heat sources 210A, 210B, and 210C are provided with pot bottom temperature sensors 230A, 230B, and 230C. The pot bottom temperature sensors 230A, 230B, and 230C function as a cooking state monitoring unit that detects the temperature of the bottom of the cooking device 250. The pot bottom temperature sensors 230A, 230B, and 230C detect the temperature of the bottom of the cooking device 250. In addition, a transmitting unit 260 that transmits the heating and non-heating states of the cooking device 200 may be provided. The heating and non-heating states are the on and off states of the switch that the cooking device 200 operates the heat source 210. When the switch is on, it is the heating state, and when it is off, it is the non-heating state. The on and off states of the switch are transmitted from the transmitting unit 260. In this specification, the heat source 210 refers to the burner cap or the fire support located near the burner for a gas cooking device, and refers to the heater for an IH cooking device.

[0080] The range hood 100 has a main body 110 at its upper portion. The main body 110 exhausts odor and oil smoke from the cooking device 200. The main body 110 has an air intake port 112 for sucking oil smoke from the cooking device 200, an exhaust port 114 connected to the outside, and a fan 116 for exhausting the oil smoke sucked from the air intake port 112 into a passage connecting the air intake port 112 and the exhaust port 114. The fan 116 is driven by a fan motor 117. A filter (disc) 118 is provided between the air intake port 112 and the fan 116, and the filter 118 rotates to remove oil from the oil smoke sucked from the air intake port 112. The filter 118 is driven by a filter motor 119. When the fan 116 rotates, the filter 118 also rotates. In addition, the range hood 100 may have a fixed (ordinary) filter that does not rotate, or may be a range hood without a filter. The range hood 100 has an operation panel 120 for instructing the operation of the range hood 100 on the front surface side. The range hood 100 has a control unit 130 described later therein. In addition, the range hood 100 may also have a receiving unit 150 that receives the heating and non-heating states transmitted from the transmitting unit 260 of the cooker 200. The heating and non-heating states received by the receiving unit 150 are output to the control unit 130. The receiving unit 150 of the range hood 100 and the transmitting unit 260 of the cooker 200 function as a cooking state monitoring unit.

[0081] (Structure of the control system of the ventilation system)

[0082] Fig.13 This is a block diagram of a control system of the range hood 100 according to Embodiment 5. 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, a notification unit 140, and a cooking appliance detection unit 230. The control unit 130 includes a threshold temperature storage unit 135. In the range hood 100 according to Embodiment 5, the control unit 130 is provided in the range hood 100. In addition, the control unit 130 may be provided in the cooker 200 instead of the range hood 100, or may be provided in both the range hood 100 and the cooker 200 in a dispersed manner.

[0083] The configurations and functions of the fan 116 , the fan motor 117 , the filter 118 , the filter motor 119 , the operation panel 120 , the threshold temperature storage unit 135 , and the notification unit 140 are as described above.

[0084] The cooking utensil detection unit 230 functions as a cooking state monitoring unit. Specifically, when the cooking device 200 is a gas cooking device, the cooking utensil detection unit 230 is a pot bottom temperature sensor 230A, 230B, 230C for detecting the temperature of the cooking utensil 250 placed on the gas cooking device, or a weight sensor for detecting the weight of the cooking utensil 250 placed on the gas cooking device. The weight sensor may be provided at the same location as the pot bottom temperature sensor 230A, 230B, 230C, or may be provided on the side of the cooking device 200 where the fire support is placed. In addition, when the cooking device 200 is an IH cooking device, the cooking utensil detection unit 230 is a pot bottom temperature sensor 230A, 230B, 230C for detecting the temperature of the cooking utensil 250 placed on the IH cooking device, a weight sensor for detecting the weight of the cooking utensil 250 placed on the IH cooking device, or a current change detection unit for detecting the current change of the coil built into the cooking device 200. Furthermore, when the cooker 200 is a gas cooker or an IH cooker, the cooking appliance detection unit 230 can be composed of the above-mentioned transmission unit 260 and reception unit 150 .

[0085] (Operation of the control unit)

[0086] Fig.14 1 is an operation flowchart showing control of the operating state of the range hood according to Embodiment 5. This operation flowchart is processed by the control unit 130 .

[0087] First, the control unit 130 detects the cooking device 250 through the cooking device detection unit 230 ( S600 ).

[0088] Next, the control unit 130 determines whether the cooking utensil 250 detected by the cooking utensil detection unit 230 has left the heat source 210 (S610). Whether the cooking utensil 250 has left the heat source 210A can be determined, for example, based on whether the temperature detected by the pot bottom temperature sensor 230A has changed sharply. When it is determined that the cooking utensil 250 has left the heat source 210A (S610: Yes), it is determined that the cooking utensil 250 has moved from the heat source 210A, and the air volume of the fan 116 and / or the rotation speed of the filter 118 are not increased (S620). The setting of not increasing the air volume of the fan 116 and / or the rotation speed of the filter 118 of the range hood 100 by the control unit 130 is the same as that in Embodiment 1.

[0089] On the other hand, if it is determined that the cooking appliance 250 has not left the heat source 210A (610: No), it is determined that the cooking appliance 250 has not moved from the heat source 210A. Figure 6 The air volume of the fan 116 and / or the rotation speed of the filter 118 are automatically controlled as shown in the action flowchart (S630).

[0090] In the fifth embodiment, since the completion of cooking can be detected by the above-described control, it is possible to prevent the air volume of fan 116 and / or the rotation speed of filter 118 from increasing even though cooking is completed, thereby preventing the user from feeling uncomfortable or unpleasant.

[0091] <Implementation method 6>

[0092] Fig.15 It is a front view when the range hood of Embodiment 6 is installed in a kitchen.

[0093] (Structure of the mechanical system of the ventilation system)

[0094] like Fig.15 As shown, the range hood 100 of the sixth embodiment is provided with a camera 400, which is adjacent to the compound eye temperature sensor 300 of the range hood 100 of the first embodiment and functions as a cooking state monitoring unit. Except for the provision of the camera 400, the structure of the range hood 100 is the same as that of the range hood 100 of the first embodiment. In addition, in the case of this embodiment, the compound eye temperature sensor 300 may also be omitted.

[0095] In addition, the structure of the cooking device 200 is also the same as the structure of the cooking device 200 of the first embodiment.

[0096] (Structure of the control system of the ventilation system)

[0097] Fig.16 6 is a block diagram of a control system for a range hood according to Embodiment 6. Fig.16 As shown, in this embodiment, the camera 400 is provided, which is different from the range hood 100 of Embodiment 1. Except for the provision of the camera 400, the other aspects are the same as those of Embodiment 1.

[0098] (Operation of the control unit)

[0099] Fig.17 1 is an operation flowchart showing control of the operating state of the range hood according to Embodiment 6. This operation flowchart is processed by the control unit 130 .

[0100] First, the control unit 130 uses the camera 400 to capture an image of the cooking device 250 ( S700 ).

[0101] Next, the control unit 130 compares the current captured image of the camera 400 with the captured image a predetermined time ago, and determines whether the cooking appliance 250 captured by the camera 400 has moved by a predetermined value or more (S710). According to the monitoring result, when the cooking appliance 250 has moved by a predetermined value or more (S710: Yes), it is determined that the cooking appliance 250 has moved from the heat source 210A, and the air volume of the fan 116 and / or the rotation speed of the filter 118 are not increased (S720). The setting of not increasing the air volume of the fan 116 and / or the rotation speed of the filter 118 of the range hood 100 by the control unit 130 is the same as that in the first embodiment.

[0102] On the other hand, if the cooking appliance 250 has not moved more than the specified value (S710: No), it is determined that the cooking appliance 250 has not moved from the heat source 210A. Figure 6 The air volume of the fan 116 and / or the rotation speed of the filter 118 are automatically controlled as shown in the action flowchart (S730).

[0103] In the sixth embodiment, since the completion of cooking can be detected by the above-described control, it is possible to prevent the air volume of fan 116 and / or the rotation speed of filter 118 from increasing even though cooking is completed, thereby preventing the user from feeling uncomfortable or unpleasant.

[0104] <Implementation method 7>

[0105] Embodiment 7 can be applied to the ventilation systems of Embodiments 1 to 6. In Embodiments 1 to 6, if it is detected that the cooking appliance 250 has moved from the heat source 210, the air volume of the fan 116 and / or the rotation speed of the filter 118 are set not to be increased, but in Embodiment 7, when it is detected that the cooking appliance 250 has returned to the heat source 210, control is performed to cancel the setting. This control is described below.

[0106] Fig.18 1 is an operation flowchart showing control of the operating state of the range hood according to Embodiment 7. This operation flowchart is processed by the control unit 130 .

[0107] Based on the monitoring results in Embodiments 1 to 6, the control unit 130 determines whether the movement of the cooking appliance 250 from the heat source 210 is detected (S800). When the movement of the cooking appliance 250 is detected (S800: Yes), the reporting unit 140 reports the movement of the cooking appliance 250 (S810). Through this report, the user can be aware that the air volume of the fan 116 and / or the rotation speed of the filter 118 will not increase even if the cooking appliance 250 moves. Next, the control unit 130 sets the air volume of the fan 116 and / or the rotation speed of the filter 118 not to increase (S830). On the other hand, when the movement of the cooking appliance 250 is not detected (S800: No), as Figure 6 The air volume of the fan 116 and / or the rotation speed of the filter 118 are automatically controlled as shown in the action flowchart (S820).

[0108] Next, the control unit 130 determines whether the cooking appliance 250 that has moved from the heat source 210 has returned to the heat source 210 again (S840). Whether the cooking appliance 250 has returned to the heat source 210 again is determined by applying the same method as the method for determining whether the cooking appliance 250 has moved from the heat source 210 in Embodiments 1 to 6. If it is determined that the cooking appliance 250 has returned to the heat source 210 again (S840: Yes), the setting that the air volume of the fan 116 and / or the rotation speed of the filter 118 are not increased, which has been processed in step S830, is canceled (S850). On the other hand, if it is determined that the cooking appliance 250 has not returned to the heat source 210 again (S840: No), the process ends.

[0109] In the seventh embodiment, by the control as described above, the operation of the range hood 100 is not affected when the cooking appliance 250 is moved temporarily or a new cooking is started instead of when the cooking is finished.

[0110] Embodiments 1 to 7 have been described above. In these embodiments, control is described for a case where cooking is performed using one heat source 210 and the cooking appliance 250 is moved from the heat source 210. However, in general, Figure 4 , Fig.12 As shown, the cooker 200 is provided with a plurality of heat sources 210A, 210B, and 210C.

[0111] Thus, when the cooking device 200 has a plurality of heat sources 210A, 210B, and 210C, if the cooking device detection unit 230 determines that the cooking device 250 has moved from a portion of the heat sources 210A, 210B, and 210C (for example, the heat source 210A), it is appropriate for the control unit 130 not to perform the setting based on the temperature detection of the portion of the heat sources (for example, the heat source 210A) and not to increase the air volume of the fan 116 and / or the rotation speed of the filter 118 of the range hood 100. That is, the temperature detection of a portion of the heat sources (for example, the heat source 210A) is canceled, and the air volume of the fan 116 and / or the rotation speed of the filter 118 are controlled based on the temperature detection of the other heat sources (for example, the heat sources 210B and 210C). Whether cooking is being performed at the plurality of heat sources 210 is determined by the control unit 130 based on detection information from the compound temperature sensor 300, images captured by the camera 400, and information from the cooking utensil detection unit 230. A specific example of the cooking utensil detection unit 230 is as described above.

[0112] For example, Figure 4 As shown, the cooking device 200 has three heat sources 210A, 210B, and 210C. It is assumed that cooking utensils 250 are placed on all three heat sources 210A, 210B, and 210C and cooking is being performed. At this time, if only the cooking utensils 250 placed on the heat source 210A is moved from the heat source 210A, the temperature detection of the heat source 210A is canceled, and the control unit 130 performs the temperature detection based on the temperature detection of the heat sources 210B and 210C. Figure 6 That is, even when only the cooking appliance 250 placed on the heat source 210A is moved from the heat source 210A, the air volume of the fan 116 and / or the rotation speed of the filter 118 may be increased.

[0113] In this way, when cooking is being performed using cooking utensils 250 other than the cooking utensils 250 determined to have moved, the fan 116 can be operated at an air volume and / or a rotation speed of the filter 118 corresponding to the cooking (the air volume and / or the rotation speed of the fan 116 and the filter 118 can be increased).

[0114] Furthermore, when the cooking status monitoring unit determines that the heat source 210 of the cooker 200 is non-heating, the control unit 130 can also set the air volume of the fan 116 of the range hood 100 and / or the rotation speed of the filter 118 without increasing the movement of the cooking utensils 250 from the three heat sources 210A, 210B, and 210C.

[0115] If such control is performed, when the three heat sources 210A, 210B, and 210C are stopped after cooking, the air volume of the fan 116 of the range hood 100 and / or the rotation speed of the filter 118 do not increase. Therefore, even if the cooking utensils 250 are moved, the air volume and / or the rotation speed of the filter do not increase, thereby preventing the user from feeling discomfort or unhappiness.

[0116] In the above embodiment, the compound eye temperature sensor 300, the camera 400, and the cooking status detection unit are exemplified as the cooking status monitoring unit, which can be installed on the range hood 100, the wall, ceiling, lighting fixture or wall cabinet of the room where the range hood 100 is installed, or on the cooker 200.

[0117] As described above, according to the range hood 100 of this embodiment, when it is determined based on the detection result of the cooking state monitoring unit that the cooking utensil 250 has left the heat source 210, the air volume of the fan 116 and / or the rotation speed of the filter 118 are not increased. Therefore, it is possible to prevent the user from feeling discomfort or unpleasantness due to an increase in the air volume and / or rotation speed even though cooking is completed.

[0118] Furthermore, when it is determined that the cooking device 250 has left one of the heat sources 210A, 210B, and 210C of the cooker 200 and it is determined that the other heat sources 210B and 210C are being used, the air volume of the fan 116 and / or the rotation speed of the filter 118 based on the temperature of the one heat source 210A detected by the cooking state monitoring unit are not increased. Therefore, even if the cooking of the one heat source 210A is completed and the heat source 210A is exposed, if the other heat sources 210B and 210C are cooking, the air volume of the fan 116 and / or the rotation speed of the filter 118 can be increased.

[0119] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be implemented in various forms based on the technical ideas described in the claims, which of course also belong to the scope of the present invention.

Claims

1. A ventilation system, characterized in that: have: A cooking status monitoring unit having a camera for photographing the cooking device; and a control unit, which controls the operation state of the range hood according to the monitoring result of the cooking state monitoring unit, The control unit determines whether the cooking appliance has moved from the heat source based on the monitoring result, and controls the operation state of the range hood based on the determination.

2. The ventilation system according to claim 1, characterized in that: The control unit sets the air volume of the fan of the range hood and / or the rotation speed of the filter not to increase when it is determined based on the monitoring result that the cooking appliance has moved from the heat source.

3. The ventilation system according to claim 2, characterized in that: When the monitoring result shows that the cooking appliance has moved by a predetermined value or more when comparing the current captured image of the camera with the captured image a predetermined time ago, the control unit determines that the cooking appliance has moved from the heat source.

4. The ventilation system according to claim 2 or 3, characterized in that: In the case where the cooking appliance has a plurality of the heat sources, when the control unit determines based on the monitoring result that the cooking appliance has moved from a part of the plurality of heat sources, the control unit does not perform settings based only on the movement from the part of the heat sources and does not increase the air volume of the fan and / or the speed of the filter of the range hood, but controls the operating state of the range hood based on the monitoring result of other heat sources.

5. The ventilation system according to claim 2 or 3, characterized in that: When the monitoring result indicates that the cooking appliance has returned to the heat source after having moved from the heat source, the control unit cancels the setting of not increasing the air volume of the fan of the range hood and / or the rotation speed of the filter.

6. The ventilation system according to claim 2 or 3, characterized in that: The cooking state monitoring unit includes a transmitting unit provided in the cooking device and configured to transmit the heating and non-heating states, and a receiving unit provided in the range hood and configured to receive the heating and non-heating states transmitted from the transmitting unit.

7. The ventilation system according to claim 2 or 3, characterized in that: The movement of the cooking appliance from the heat source is determined on at least one of the range hood side and the cooker side.

8. The ventilation system according to claim 2 or 3, characterized in that: The control unit further performs setting so as not to increase the air volume of the fan of the range hood and / or the rotation speed of the filter when the cooking state monitoring unit determines that the heat source of the cooking device is non-heating.

9. The ventilation system according to claim 2 or 3, characterized in that: The method further includes a notification unit that notifies the movement of the cooking appliance, and the control unit operates the notification unit when the control unit determines that the cooking appliance has moved from the heat source.

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