Ventilation system

Abstract

To prevent an increase in air quantity of a fan and / or rotational frequency of a filter when a cooking apparatus is separated from a heat source.SOLUTION: A ventilation system includes a cooking state monitoring section 300 and a control section 130. The cooking state monitoring section 300 monitors a cooking state. The control section 130 controls an operating state of a range hood 100 on the basis of a monitoring result obtained by the cooking state monitoring section 300. When determining that a cooking apparatus 250 has been moved from a heat source 210 on the basis of the monitoring result, the control section 130 performs setting so as not to increase air quantity of a fan and / or rotational frequency of a filter of the range hood 100.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a ventilation system. [Background technology]

[0002] Conventionally, there is a range hood that detects the temperature above the cooking appliance using a temperature sensor attached to the range hood and determines the fan volume and / or filter rotation speed according to the detected temperature, thereby automatically operating (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-105568 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional range hoods such as that in Patent Document 1 operate with a low fan air volume and / or a low filter rotation speed when the temperature of the top surface of the cooker is low, and operate with a high fan air volume and / or a high filter rotation speed when the temperature of the top surface of the cooker is high. When cooking using cookware such as a frying pan or pot, in order to serve food after cooking is finished, the cookware may be held in the hand and brought close to the plate to serve the food.

[0005] In this case, when the cooking appliance is removed from the cooker, the heat source (the burner cap or trivet near the burner for a gas cooker, or the heater for an induction cooker) becomes exposed, and the temperature sensor detects the exposed high-temperature heat source. Conventional range hoods increase the fan volume and / or filter rotation speed even in such cases.

[0006] This causes a problem in that a user of the range hood may feel uneasy or uncomfortable because the fan volume and / or the filter rotation speed are increased even though cooking has been completed.

[0007] Therefore, an object of the present invention is to provide a ventilation system that does not increase the air volume of the fan and / or the rotation speed of the filter when a cooking utensil is moved away from a heat source. [Means for solving the problem]

[0008] In order to achieve the above object, the ventilation system of the present invention has a cooking state monitoring unit and a control unit. The cooking state monitoring unit monitors the cooking state. The control unit controls the operating state of the range hood based on the monitoring result by the cooking state monitoring unit. Specifically, when the control unit determines based on the monitoring result that the cooking utensil has been moved away from the heat source, it sets the range hood fan air volume and / or the filter rotation speed not to increase. Effect of the Invention

[0009] According to the present invention, it is possible to prevent the fan air volume and / or the filter rotation speed from increasing even after cooking has been completed, which causes a sense of incongruity or discomfort to a user of the range hood. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a front view of a range hood according to any one of the first to fourth embodiments installed in a kitchen. [Diagram 2] FIG. 1 is a side view of a range hood according to any one of the first to fourth embodiments installed in a kitchen. [Diagram 3] FIG. 2 is a front view of an operation panel provided on the range hood of the first to seventh embodiments. [Figure 4] FIG. 4 is a diagram showing a schematic diagram of a state in which the temperature above a cooking appliance is detected by a compound temperature sensor of the range hood according to the first to fourth embodiments. [Diagram 5] FIG. 2 is a block diagram of a control system for the range hood according to the first to fourth embodiments. [Figure 6] 4 is an operational flowchart relating to control of the air volume of a fan and / or the rotation speed of a filter in the range hoods according to the first to seventh embodiments. [Figure 7] 4 is an operational flowchart showing control of the operating state of the range hood of the first embodiment. [Figure 8] 10 is an operational flowchart showing control of the operating state of the range hood of the second embodiment. [Figure 9] 11 is an operational flowchart showing control of the operating state of a range hood according to a third embodiment. [Figure 10] 10 is an operational flowchart showing control of the operating state of a range hood according to a fourth embodiment. [Figure 11] FIG. 11 is a front view of the range hood of the fifth embodiment installed in a kitchen. [Figure 12] FIG. 13 is a diagram showing a schematic arrangement of a cooking state monitoring unit of a range hood according to a fifth embodiment. [Figure 13] FIG. 13 is a block diagram of a control system of the range hood of the fifth embodiment. [Figure 14] 13 is an operational flowchart showing control of the operating state of a range hood according to a fifth embodiment. [Figure 15] FIG. 13 is a front view of the range hood of the sixth embodiment installed in a kitchen. [Figure 16] FIG. 13 is a block diagram of a control system of the range hood of the sixth embodiment. [Figure 17] 13 is an operational flowchart showing control of the operating state of a range hood according to a sixth embodiment. [Figure 18] 13 is an operational flowchart showing control of the operating state of the range hood of the seventh embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings, divided into <Embodiment 1> to <Embodiment 7>. However, the present invention is not limited to the following embodiments. Note that the drawings are exaggerated for the convenience of explanation. Therefore, the dimensional ratios of each component in each drawing are different from the actual ones. Also, the same elements in the drawings are given the same reference numerals, and duplicated explanations in the specification are omitted.

[0012] Fig. 1 is a front view of the range hood of any of the first to fourth embodiments when installed in a kitchen, and Fig. 2 is a side view of the range hood of any of the first to fourth embodiments when installed in a kitchen.

[0013] (Mechanical configuration of ventilation system) As shown in Fig. 1 and Fig. 2, the range hood 100 of the first to fourth embodiments is installed on the top of a cooking appliance 200. The range hood 100 sucks in odors, smoke, oil, and other odors and oily smoke generated during cooking in the cooking appliance 200 and exhausts them to the outside. The illustrated cooking appliance 200 has a heat source 210 (a collective term for three heat sources 210A, 210B, and 210C, described below) that heats a cooking utensil 250 such as a pot or frying pan, and a grill outlet 220. In this specification, the heat source 210 refers to a burner cap or a trivet located near a burner for a gas cooking appliance, and a heater for an IH cooking appliance.

[0014] The range hood 100 has a compound temperature sensor 300 on the underside of the front side to the left of the center, which detects the temperature above the cooking appliance 200. The compound temperature sensor 300 functions as a cooking state monitoring unit that monitors the cooking state. The compound temperature sensor 300 detects the temperature of the area shown by the dotted line in the figure. The compound temperature sensor 300 used in this embodiment has, for example, 64 pixels (8 x 8) and can separately detect the temperature of the area corresponding to each pixel. The compound temperature sensor 300 can detect the temperature above the cooking appliance 200 by dividing it into 64 areas, and can also detect the temperature of each of the three heat sources 210A, 210B, and 210C individually. In this embodiment, a compound temperature sensor 300 having 64 pixels (8 x 8) is exemplified, but a compound temperature sensor 300 having fewer or more pixels may be used.

[0015] The range hood 100 has a main body 110 at its upper part. The main body 110 exhausts odors and oily smoke from the cooking appliance 200. The main body 110 has an intake port 112 that sucks in oily smoke from the cooking appliance 200, an exhaust port 114 that communicates with the outdoors, and a fan 116 that exhausts the oily smoke sucked from the intake port 112 into a passage connecting the intake port 112 and the exhaust port 114. The fan 116 is driven by a fan motor 117. Between the intake port 112 and the fan 116, a filter (disk) 118 that rotates to remove oil from the oily smoke sucked from the intake port 112 is provided. The filter 118 is driven by a filter motor 119. When the fan 116 rotates, the filter 118 also rotates. The range hood 100 may have a fixed (normal) filter that does not rotate, or may be filterless. The range hood 100 is provided with an operation panel 120 on the front side for instructing the operation of the range hood 100. The range hood 100 also has therein a control unit 130, which will be described later.

[0016] 3 is a front view of an operation panel 120 provided in the range hood 100 of any of the first to seventh embodiments. 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 constant ventilation switch 126.

[0017] 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 the operation switch 121 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 low, medium, or high. The automatic air volume switch 123 is a switch for performing an automatic operation in which the air volume of the fan 116 and the rotation speed of the filter 118 are automatically switched in stages or continuously according to the temperature above the cooking appliance 200 detected by the compound temperature sensor 300. Note that this automatic operation is canceled when the air volume switch 122 is pressed. The timer switch 124 is a switch for setting the time for rotating the fan 116 and the filter 118 after cooking is completed. The lighting switch 125 is a switch for turning on / off an LED light bulb that illuminates the top surface of the cooking appliance 200. The constant ventilation switch 126 is a switch for manually rotating / stopping the fan 116 to start / stop the constant ventilation.

[0018] 4 is a diagram showing a schematic diagram of the detection state of the temperature above the cooker 200 by the compound temperature sensor 300 of the range hood of the first to fourth embodiments. As described above, the compound temperature sensor 300 is attached to the underside of the range hood 100, so that the temperature above the cooker 200 is detected in an area covering the heat sources (burner caps, trivets or heaters near the burners) 210A, 210B, 210C of the cooker 200 and the grill outlet 220. The temperatures of the heat sources 210A, 210B, 210C of the cooker 200 are detected as the maximum temperatures of the areas corresponding to the heat sources 210A, 210B, 210C of the pixels (Tij (i=1 to 8, j=1 to 8)) divided into 64 pixels (8×8) as shown in FIG. 4, for example. Therefore, range hood 100 can easily determine, from the detection result of multi-eye temperature sensor 300, which of heat sources 210A, 210B, 210C of cooking appliance 200 is being used and which heat source cooking appliance 250 has moved away from.

[0019] (Configuration of the ventilation system control system) 5 is a block diagram of a control system of the range hood 100 of the first to fourth embodiments. The range hood 100 has 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 temperature sensor 300. The control unit 130 has a threshold temperature memory unit 135. In the range hood 100 of the first to fourth embodiments, the control unit 130 is provided in the range hood 100. The control unit 130 may be provided in the cooker 200 instead of the range hood 100, or may be provided separately in both the range hood 100 and the cooker 200.

[0020] 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.

[0021] The threshold temperature storage unit 135 stores a threshold temperature for changing the airflow rate of the fan 116 and / or the rotation speed of the filter 118.

[0022] The control unit 130 controls the operating state of the range hood 100 based on the monitoring results of the compound temperature sensor 300. Specifically, when the automatic air volume switch 123 (see FIG. 3) of the operation panel 120 is pressed and the range hood 100 is automatically operated, the control unit 130 compares the temperature above the cooking appliance 200 detected by the compound temperature sensor 300 with the threshold temperature (for the fan) stored in the threshold temperature memory unit 135 to determine the air volume of the fan 116. The control unit 130 also compares the temperature above the cooking appliance 200 detected by the compound temperature sensor 300 with the threshold temperature (for the filter) stored in the threshold temperature memory unit 135 to determine the rotation speed of the filter 118. Note that the control unit 130 determines only the air volume of the fan 116 in the case of a filterless range hood that does not have the filter 118 or a range hood that has a fixed filter.

[0023] Furthermore, when the control unit 130 determines that the cooking utensil 250 has been moved from the heat source 210 based on the monitoring results of the compound temperature sensor 300, it sets the air volume of the fan 116 of the range hood 100 and / or the rotation speed of the filter 118 not to be increased. By setting the control unit 130 in this manner, it is possible to prevent the user from feeling strange or uncomfortable due to the air volume of the fan 116 and / or the rotation speed of the filter 118 increasing even though cooking has been completed. The movement of the cooking utensil 250 from the heat source 210 may be determined on the range hood side or on the cooking appliance side.

[0024] Notification unit 140 notifies the movement of cooking utensil 250 from heat source 210. Notification unit 140 is a sound output unit or a light, and the movement of cooking utensil 250 is notified by an alarm sound output from the sound output unit, or by the light turning on or blinking. The sound output unit is a speaker, buzzer, or the like that outputs sound, and the light is an LED light provided on operation panel 120, an LED bulb that illuminates the top surface of cooking appliance 200, an LED light provided on the operation panel of cooking appliance 200, or the like.

[0025] (Operation of control unit) 6 is an operational flowchart relating to control of the air volume of the fan and / or the rotation speed of the filter in the range hood of any of the embodiments 1 to 7. This operational flowchart is processed by the control unit 130.

[0026] The control unit 130 detects the temperature above the cooker 200 using the compound temperature sensor 300 (S100). Next, the control unit 130 compares the detected temperature above the cooker 200 with a 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 between the temperature above the cooker 200 and the threshold temperature (S120). In this case, the higher the temperature above the cooker 200, the higher 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 lower the air volume of the fan 116 and / or the rotation speed of the filter 118. For example, when cooking utensil 250 is moved from cooker 200, the heat source of cooker 200 becomes exposed, so that a portion of the area of ​​compound temperature sensor 300 detects a sudden rise in temperature above cooker 200, causing a sudden increase in the airflow of fan 116 and / or the rotation speed of filter 118. In this embodiment, in order to prevent a sudden increase in the airflow of fan 116 and / or the rotation speed of filter 118 after cooking is finished, control unit 130 is caused to perform control as shown in the following embodiments 1 to 4.

[0027] <Embodiment 1> 7 is an operation flowchart showing the control of the operating state of the range hood of the first embodiment. This operation flowchart is also processed by the control unit 130. This operation flowchart is executed when the automatic air volume switch 123 of the operation panel 120 (see FIGS. 3 and 5) is pressed and the range hood 100 is in automatic operation. Therefore, the control unit 130 controls the air volume of the fan 116 and / or the rotation speed of the filter 118 according to the temperature detected by the compound temperature sensor 300, while independently controlling the next automatic operation.

[0028] First, the control unit 130 detects the temperature above the cooking appliance 200 using the compound temperature sensor 300 (S200). As shown in FIG. 4, the compound temperature sensor 300 can detect the temperature above the cooking appliance 200 in 64 separate regions. For example, when cooking is being done with cooking utensil 250 heated by heat source 210A, the temperature of the region above heat source 210A is detected as being higher than the temperatures of the other regions. Also, for example, when cooking is finished and cooking utensil 250 is moved from heat source 210A to serve the food on a plate, the temperature of the region above the exposed heat source 210A is detected as a temperature that is rising rapidly.

[0029] Next, the control unit 130 judges whether the range of the temperature rise detected by the compound temperature sensor 300 is equal to or higher than the predetermined temperature and within the predetermined range (S210). When the cooking utensil 250 is moved from the heat source 210A, the temperature of the exposed area above the heat source 210A rises rapidly. On the other hand, the temperature of the unexposed area above the heat source 210A hardly changes. Therefore, in the first embodiment, if the range of the temperature rise is equal to or higher than the predetermined temperature and within the predetermined range (S210: YES), it is judged that a part of the heat source 210A is exposed and 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 (S220). The setting by control unit 130 of not increasing the air volume of fan 116 of range hood 100 and / or the rotation speed of filter 118 means that either a signal to increase the air volume of fan 116 of range hood 100 and / or the rotation speed of filter 118 is not transmitted within control unit 130, or a portion within control unit 130 that controls the air volume of fan 116 of range hood 100 and / or the rotation speed of filter 118 does not receive a signal to increase them, or even if a signal to increase them is received, the portion cancels the received signal.

[0030] On the other hand, if the range of the rising temperature is equal to or higher than the predetermined temperature but is not within the predetermined range (S210: NO), it is determined that cooking utensil 250 has not moved from heat source 210A, and the airflow rate of fan 116 and / or the rotation speed of filter 118 are automatically controlled as shown in the operational flowchart of FIG. 6 (S230).

[0031] In the first embodiment, the above-described control makes it possible to detect when cooking is complete, thereby preventing the user from feeling strange or uncomfortable due to an increase in the airflow of fan 116 and / or the rotation speed of filter 118 even though cooking is complete.

[0032] <Embodiment 2> 8 is an operational flowchart showing control of the operating state of the range hood of embodiment 2. This operational flowchart is also processed by the control unit 130. Note that this operational flowchart is also executed when the range hood 100 is in automatic operation.

[0033] First, the control unit 130 detects the temperature above the cooking appliance 200 using the compound temperature sensor 300 (S300).

[0034] Next, the control unit 130 judges whether the temperature difference of each pixel in the area where the temperature is rising, detected by the compound temperature sensor 300, has changed to a state within a specific preset range (S310). When the temperature of the cooking utensil 250 and the temperature of the food are different, or when the food is sparsely placed on the cooking utensil 250 (such as stir-frying), the temperature distribution appears sparse during cooking. However, when the cooking utensil 250 is moved from the heat source 210A, the temperature difference between adjacent pixels becomes smaller (the temperature difference falls within a specific prescribed range). Also, when the cooking utensil 250 is moved from the heat source 210A, the temperature of the area above the exposed heat source 210A rises rapidly, but after the cooking utensil 250 is completely moved from the heat source 210A, the temperature difference between the pixels corresponding to the adjacent areas disappears and changes to a state within a specific preset range. Therefore, in the second embodiment, when the temperature difference between the pixels in the range where the temperature is rising changes to a state within a specific preset range (S310: YES), it is determined that the heat source 210A is exposed and the cooking utensil 250 has moved away 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). Note that the setting by the control unit 130 not to increase the air volume of the fan 116 of the range hood 100 and / or the rotation speed of the filter 118 is the same as in the first embodiment.

[0035] On the other hand, if the temperature difference between the pixels in the range where the temperature is rising has not changed to be within a specific predetermined range (S310: NO), it is determined that the cooking utensil 250 has not moved from the heat source 210A, and the airflow rate of the fan 116 and / or the rotation speed of the filter 118 are automatically controlled as shown in the operational flowchart of FIG. 6 (S330).

[0036] In the second embodiment, the above-described control makes it possible to detect when cooking is complete, thereby preventing the user from feeling strange or uncomfortable due to an increase in the airflow of fan 116 and / or the rotation speed of filter 118 even though cooking is complete.

[0037] <Embodiment 3> 9 is an operational flowchart showing control of the operating state of the range hood of embodiment 3. This operational flowchart is also processed by the control unit 130. Note that this operational flowchart is also executed when the range hood 100 is in automatic operation.

[0038] First, the control unit 130 detects the temperature above the cooking appliance 200 using the compound temperature sensor 300 (S400).

[0039] Next, the control unit 130 judges whether the range of the temperature rise detected by the compound temperature sensor 300 has moved by a predetermined value or more compared to a predetermined time ago (S410). For example, when cooking food with the cooking utensil 250, the temperature rise range of the cooking utensil 250 and the food shifts in the direction of movement when the cooking utensil 250 is moved. Also, when the cooking utensil 250 is moved from the heat source 210A, the exposed part of the heat source 210A increases with the movement of the cooking utensil 250. Therefore, in the third embodiment, when the range of the temperature rise has moved by a predetermined value or more compared to a predetermined time ago (S410: YES), it is judged 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). The setting by the control unit 130 not to increase the air volume of the fan 116 and / or the rotation speed of the filter 118 of the range hood 100 is the same as in the first embodiment.

[0040] On the other hand, if the range of the rising temperature has not moved by more than the predetermined value compared to the predetermined time before (S410: NO), it is determined that cooking utensil 250 has not moved from heat source 210A, and the airflow rate of fan 116 and / or the rotation speed of filter 118 are automatically controlled as shown in the operational flowchart of FIG. 6 (S430).

[0041] In the third embodiment, the above-described control makes it possible to detect that cooking is complete, thereby preventing the user from feeling strange or uncomfortable due to an increase in the airflow of fan 116 and / or the rotation speed of filter 118 even though cooking is complete.

[0042] <Embodiment 4> 10 is an operational flowchart showing control of the operating state of the range hood of embodiment 4. This operational flowchart is also processed by the control unit 130. Note that this operational flowchart is also executed when the range hood 100 is in automatic operation.

[0043] First, the control unit 130 detects the temperature above the cooking appliance 200 using the compound temperature sensor 300 (S500).

[0044] Next, the control unit 130 judges whether the range of the temperature rise detected by the compound temperature sensor 300 has expanded compared to a predetermined time ago (S510). The range of the temperature rise has expanded means that, whereas the range of the temperature rise was the cooking utensil 250 and its cooking object, the cooking utensil 250 and its cooking object are now exposed to the heat source 210A in addition to the cooking utensil 250 and its cooking object as the cooking utensil 250 moves. Therefore, when the cooking utensil 250 is moved from the heat source 210A, the exposed portion of the heat source 210A increases as the cooking utensil 250 moves. Therefore, in the fourth embodiment, if the range of the temperature rise has expanded compared to a predetermined time ago (S510: YES), it is judged 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). The setting performed by the control unit 130 not to increase the air volume of the fan 116 of the range hood 100 and / or the rotation speed of the filter 118 is the same as in the first embodiment.

[0045] On the other hand, if the range of the temperature rise has not expanded compared to before the specified time (S510: NO), it is determined that cooking utensil 250 has not moved from heat source 210A, and the airflow rate of fan 116 and / or the rotation speed of filter 118 are automatically controlled as shown in the operational flowchart of FIG. 6 (S530).

[0046] In the fourth embodiment, the above-described control makes it possible to detect when cooking is complete, thereby preventing the user from feeling strange or uncomfortable due to an increase in the airflow of fan 116 and / or the rotation speed of filter 118 even though cooking is complete.

[0047] In the above, in the first to fourth embodiments, a ventilation system has been described which uses compound temperature sensor 300 as a cooking state monitor, uses the temperatures of each area detected by compound temperature sensor 300 as the monitoring result, and determines that cooking utensil 250 has moved if the temperature distribution in the detected range changes, and controls the airflow of fan 116 and / or the rotation speed of filter 118. Next, a ventilation system which uses cooking utensil detection unit 230 of cooker 200 as a cooking state monitor, uses the detection result by cooking utensil detection unit 230 as the monitoring result, and controls the airflow of fan 116 and / or the rotation speed of filter 118 will be described as a fifth embodiment.

[0048] <Embodiment 5> Fig. 11 is a front view of the range hood of the fifth embodiment installed in a kitchen, and Fig. 12 is a diagram showing a schematic arrangement of a cooking state monitoring unit of the range hood of the fifth embodiment.

[0049] (Mechanical configuration of ventilation system) As shown in FIG. 11, the range hood 100 of the fifth embodiment is installed on the top of a cooking appliance 200. The cooking appliance 200 shown in the example has three heat sources 210A, 210B, and 210C for heating a cooking appliance 250 such as a pot or a frying pan, and a grill outlet 220. As shown in FIG. 12, 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 status monitor that detects the temperature of the bottom of the cooking appliance 250. The pot bottom temperature sensors 230A, 230B, and 230C detect the temperature of the bottom of the cooking appliance 250. The cooking appliance 200 may also have a transmitter 260 that transmits the heating and non-heating status of the cooking appliance 200. The heating and non-heating states are the on / off states of a switch that operates heat source 210 of cooking appliance 200, and when the switch is on, the cooking appliance is in a heating state, and when the switch is off, the cooking appliance is in a non-heating state. The on / off state of this switch is transmitted from transmitting unit 260. In this specification, heat source 210 refers to a burner cap or a trivet near a burner for a gas cooking appliance, and a heater for an IH cooking appliance.

[0050] The range hood 100 has a main body 110 at its upper part. The main body 110 exhausts odors and oily smoke from the cooking appliance 200. The main body 110 has an intake port 112 that sucks in oily smoke from the cooking appliance 200, an exhaust port 114 that communicates with the outdoors, and a fan 116 that exhausts the oily smoke sucked from the intake port 112 into a passage connecting the intake port 112 and the exhaust port 114. The fan 116 is driven by a fan motor 117. Between the intake port 112 and the fan 116, a filter (disk) 118 that rotates to remove oil from the oily smoke sucked from the intake port 112 is provided. The filter 118 is driven by a filter motor 119. When the fan 116 rotates, the filter 118 also rotates. The range hood 100 may have a fixed (normal) filter that does not rotate, or may be a filterless range hood. The range hood 100 has an operation panel 120 on the front side for instructing the operation of the range hood 100. The range hood 100 has a control unit 130 therein, which will be described later. The range hood 100 may also have a receiving unit 150 that receives the heating and non-heating states transmitted from a transmitting unit 260 of the cooking appliance 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 cooking appliance 200 function as a cooking state monitoring unit.

[0051] (Configuration of the ventilation system control system) 13 is a block diagram of a control system of the range hood 100 of the fifth embodiment. The range hood 100 has 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 has a threshold temperature storage unit 135. In the range hood 100 of the fifth embodiment, the control unit 130 is provided in the range hood 100. The control unit 130 may be provided in the cooker 200 instead of the range hood 100, or may be provided separately in both the range hood 100 and the cooker 200.

[0052] 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.

[0053] The cooking utensil detection unit 230 functions as a cooking state monitoring unit, and specifically, when the cooking appliance 200 is a gas cooker, it is a pan bottom temperature sensor 230A, 230B, 230C that detects the temperature of the cooking appliance 250 placed on the gas cooker, or a weight sensor that detects the weight of the cooking appliance 250 placed on the gas cooker. The weight sensor may be provided in the same place as the pan bottom temperature sensor 230A, 230B, 230C, or may be provided on the cooking appliance 200 side on which the trivet is placed. When the cooking appliance 200 is an IH cooker, the cooking utensil detection unit 230 is a pan bottom temperature sensor 230A, 230B, 230C that detects the temperature of the cooking appliance 250 placed on the IH cooker, a weight sensor that detects the weight of the cooking appliance 250 placed on the IH cooker, or a current change detection unit that detects a current change in a coil built into the cooking appliance 200. Furthermore, the cooking appliance detection unit 230 can be configured by the above-mentioned transmission unit 260 and reception unit 150, regardless of whether the cooking appliance 200 is a gas cooking appliance or an IH cooking appliance.

[0054] (Operation of control unit) 14 is an operational flowchart showing control of the operating state of the range hood of embodiment 5. This operational flowchart is processed by the control unit 130.

[0055] First, control unit 130 detects cooking utensils 250 using cooking utensil detection unit 230 (S600).

[0056] Next, the control unit 130 judges whether the cooking utensil 250 detected by the cooking utensil detection unit 230 has moved away from the heat source 210 (S610). Whether the cooking utensil 250 has moved away from the heat source 210A can be judged, for example, by whether the temperature detected by the pan bottom temperature sensor 230A has changed suddenly. If it is judged that the cooking utensil 250 has moved away from the heat source 210A (S610: YES), it is judged that the cooking utensil 250 has moved away 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). Note that the setting by the control unit 130 not to increase the air volume of the fan 116 and / or the rotation speed of the filter 118 of the range hood 100 is the same as in the first embodiment.

[0057] On the other hand, if it is determined that cooking utensil 250 has not moved away from heat source 210A (610: NO), it is determined that cooking utensil 250 has not moved away from heat source 210A, and the airflow rate of fan 116 and / or the rotation speed of filter 118 are automatically controlled as shown in the operational flowchart of FIG. 6 (S630).

[0058] In the fifth embodiment, the above-described control makes it possible to detect that cooking is complete, thereby preventing the user from feeling strange or uncomfortable due to an increase in the airflow of fan 116 and / or the rotation speed of filter 118 even though cooking is complete.

[0059] <Embodiment 6> FIG. 15 is a front view of the range hood of the sixth embodiment installed in a kitchen.

[0060] (Mechanical configuration of ventilation system) 15, the range hood 100 of the sixth embodiment is provided with a camera 400 functioning as a cooking state monitoring unit adjacent to the compound temperature sensor 300 of the range hood 100 of the first embodiment. Other than the provision of the camera 400, the configuration of the range hood 100 is the same as that of the range hood 100 of the first embodiment. In this embodiment, the compound temperature sensor 300 may be omitted.

[0061] Additionally, the configuration of cooking appliance 200 is the same as that of cooking appliance 200 of the first embodiment.

[0062] (Configuration of the ventilation system control system) Fig. 16 is a block diagram of a control system for the range hood of embodiment 6. As shown in Fig. 16, this embodiment differs from the range hood 100 of embodiment 1 in that a camera 400 is provided. Other than the provision of the camera 400, the embodiment is the same as embodiment 1.

[0063] (Operation of control unit) 17 is an operational flowchart showing control of the operating state of the range hood of embodiment 6. This operational flowchart is processed by the control unit 130.

[0064] First, control unit 130 causes camera 400 to capture an image of cooking utensil 250 (S700).

[0065] Next, the control unit 130 compares the current image captured by the camera 400 with the image captured a predetermined time ago to determine whether the cooking utensil 250 captured by the camera 400 has moved by a predetermined amount or more (S710). If the monitoring result indicates that the cooking utensil 250 has moved by a predetermined amount or more (S710: YES), it determines that the cooking utensil 250 has moved from the heat source 210A, and does not increase the air volume of the fan 116 and / or the rotation speed of the filter 118 (S720). Note that the setting by the control unit 130 not to increase the air volume of the fan 116 of the range hood 100 and / or the rotation speed of the filter 118 is the same as in the first embodiment.

[0066] On the other hand, if cooking utensil 250 has not moved by more than the predetermined distance (S710: NO), it is determined that cooking utensil 250 has not moved from heat source 210A, and the airflow rate of fan 116 and / or the rotation speed of filter 118 are automatically controlled as shown in the operational flowchart of FIG. 6 (S730).

[0067] In the sixth embodiment, the above-described control makes it possible to detect when cooking is complete, thereby preventing the user from feeling strange or uncomfortable due to an increase in the airflow of fan 116 and / or the rotation speed of filter 118 even though cooking is complete.

[0068] <Embodiment 7> The seventh embodiment can be applied to the ventilation systems of the first to sixth embodiments. In the first to sixth embodiments, the air volume of the fan 116 and / or the rotation speed of the filter 118 are set not to increase when it is detected that the cooking utensil 250 has been moved away from the heat source 210, but in the seventh embodiment, when it is detected that the cooking utensil 250 has been returned to the heat source 210, the setting is cancelled. This control will be described below.

[0069] 18 is an operational flowchart showing control of the operating state of the range hood of embodiment 7. This operational flowchart is processed by the control unit 130.

[0070] Based on the monitoring results in the first to sixth embodiments, the control unit 130 judges whether or not the movement of the cooking utensil 250 from the heat source 210 has been detected (S800). If the movement of the cooking utensil 250 has been detected (S800: YES), the notification unit 140 notifies the movement of the cooking utensil 250 (S810). This notification allows the user to recognize that the air volume of the fan 116 and / or the rotation speed of the filter 118 will not increase even if the cooking utensil 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, if the movement of the cooking utensil 250 has not been detected (S800: NO), the control unit 130 automatically controls the air volume of the fan 116 and / or the rotation speed of the filter 118 as shown in the operation flowchart of FIG. 6 (S820).

[0071] Next, control unit 130 determines whether cooking utensil 250, which was removed from heat source 210, has been returned to heat source 210 again (S840). Whether cooking utensil 250 has been returned to heat source 210 again is determined by applying the same method as that for determining whether cooking utensil 250 has been moved from heat source 210 in embodiments 1 to 6. If control unit 130 determines that cooking utensil 250 has been returned to heat source 210 again (S840: YES), control unit 130 cancels the setting processed in step S830 that does not increase the air volume of fan 116 and / or the rotation speed of filter 118 (S850). On the other hand, if control unit 130 determines that cooking utensil 250 has not been returned to heat source 210 again (S840: NO), control unit 130 ends the process.

[0072] In the seventh embodiment, the above-described control allows for temporary movement of the cooking utensil 250 or the start of new cooking, without affecting the operation of the range hood 100, rather than the end of cooking.

[0073] Above, embodiments 1 to 7 have been described. In these embodiments, the control in the case where cooking is being performed using one heat source 210 and cooking utensil 250 is moved from that heat source 210 has been described. However, in general, as shown in Figs. 4 and 12, a cooker 200 is provided with multiple heat sources 210A, 210B, and 210C.

[0074] In this way, when cooking appliance 200 has multiple heat sources 210A, 210B, and 210C, if cooking appliance detection unit 230 determines that cooking appliance 250 has moved from some of the heat sources 210A, 210B, and 210C (e.g., heat source 210A), it is appropriate for control unit 130 not to set the air volume of fan 116 of range hood 100 and / or the rotation speed of filter 118 not to be increased based on the temperature detection of some of the heat sources (e.g., heat source 210A). In other words, the temperature detection of some of the heat sources (e.g., heat source 210A) is canceled, and the air volume of fan 116 and / or the rotation speed of filter 118 are controlled based on the temperature detection of other heat sources (e.g., heat sources 210B and 210C). Whether cooking is being performed using multiple heat sources 210 is determined by the control unit 130, for example, from detection information from the compound temperature sensor 300, images captured by the camera 400, and information from the cooking utensil detection unit 230. Specific examples of the cooking utensil detection unit 230 are as described above.

[0075] For example, as shown in Fig. 4, assume that cooking appliance 200 has three heat sources 210A, 210B, and 210C, and cooking is being performed with cooking utensils 250 hanging on all three heat sources 210A, 210B, and 210C. In this case, if only cooking utensil 250 hanging on heat source 210A is moved from heat source 210A, control unit 130 cancels the temperature detection of heat source 210A, and performs normal control as shown in the operation flowchart of Fig. 6 based on the temperature detection of heat sources 210B and 210C. In other words, if only cooking utensil 250 hanging on heat source 210A is moved from heat source 210A, the air volume of fan 116 and / or the rotation speed of filter 118 may increase.

[0076] In this way, when cooking is in progress using a cooking utensil 250 other than the cooking utensil 250 determined to have been moved, the fan 116 can be operated at an air volume and / or filter 118 rotation speed appropriate for the cooking (the fan 116 air volume and / or filter 118 rotation speed can be increased).

[0077] Furthermore, when the cooking status monitoring unit determines that the heat source 210 of the cooker 200 is not being heated, the control unit 130 can set the unit not to detect the movement of the cooking utensil 250 from the three heat sources 210A, 210B, 210C and not to increase the air volume of the fan 116 of the range hood 100 and / or the rotation speed of the filter 118.

[0078] With this type of control, when the three heat sources 210A, 210B, 210C are deactivated after cooking is completed, the air volume of the fan 116 of the range hood 100 and / or the rotation speed of the filter 118 do not increase, so that even if the cooking utensil 250 moves, the air volume and / or the rotation speed of the filter do not increase, preventing the user from feeling strange or uncomfortable.

[0079] In the above embodiments, the compound temperature sensor 300, the camera 400, and the cooking state detection unit are exemplified as cooking state monitoring units, but these can be installed on the range hood 100, on a wall, ceiling, lighting fixture, or hanging cupboard in the room in which the range hood 100 is installed, or can be provided on the cooking appliance 200.

[0080] As described above, according to the range hood 100 of this embodiment, when it is determined from the detection result of the cooking state monitoring unit that cooking utensil 250 has moved away from heat source 210, the air volume of fan 116 and / or the rotation speed of filter 118 are not increased. This prevents the user from feeling strange or uncomfortable due to an increase in the air volume and / or rotation speed even though cooking has finished.

[0081] Furthermore, when it is determined that cooking utensil 250 has moved away from one heat source 210A among multiple heat sources 210A, 210B, 210C of cooker 200, and at the same time it is determined that the other heat sources 210B, 210C are in use, the air volume of fan 116 and / or the rotation speed of filter 118 are not increased based on the temperature of said one heat source 210A detected by the cooking status monitoring unit. Therefore, even if cooking with said one heat source 210A is finished and heat source 210A is exposed, if cooking is being performed with the other heat sources 210B, 210C, the air volume of fan 116 and / or the rotation speed of filter 118 can be increased.

[0082] Although an embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can be embodied in various forms based on the technical ideas described in the claims, and it goes without saying that these also fall within the scope of the present invention.

[0083] The following embodiments are also included within the scope of the present invention.

[0084] (1) A ventilation system having a cooking status monitoring unit that monitors the cooking status, and a control unit that controls the operating status of a range hood based on the monitoring results by the cooking status monitoring unit, wherein when the control unit determines based on the monitoring results that a cooking utensil has been moved away from a heat source, it sets the range hood fan volume and / or filter rotation speed not to be increased.

[0085] (2) The cooking status monitoring unit is a compound temperature sensor that detects the temperature above the cooking appliance, and the control unit determines that the cooking appliance has moved away from the heat source when the monitoring result shows that the range of rising temperature detected by the compound temperature sensor is above a predetermined temperature and within the predetermined range, and sets the range hood fan's airflow and / or filter rotation speed not to be increased, in the ventilation system described in (1) above.

[0086] (3) The cooking status monitoring unit is a compound temperature sensor that detects the temperature above the cooking appliance, and the control unit, when the monitoring result changes to a state in which the temperature difference between each pixel in the range of rising temperature detected by the compound temperature sensor is within a specific predetermined range, determines that the cooking appliance has moved away from the heat source and sets the range hood fan's airflow and / or filter rotation speed not to be increased, in the ventilation system described in (1) above.

[0087] (4) The cooking status monitoring unit is a compound temperature sensor that detects the temperature above the cooking appliance, and the control unit, when the monitoring result shows that the range of rising temperature detected by the compound temperature sensor has moved by more than a predetermined value compared to a predetermined time ago, determines that the cooking appliance has moved from the heat source and sets the range hood fan's airflow and / or filter rotation speed not to be increased, in the ventilation system described in (1) above.

[0088] (5) The cooking status monitoring unit is a multi-eye temperature sensor that detects the temperature above the cooking appliance, and the control unit, when the monitoring result shows that the range of increasing temperature detected by the multi-eye temperature sensor has expanded compared to a predetermined time ago, determines that the cooking appliance has moved away from the heat source and sets the range hood fan's airflow and / or filter rotation speed not to be increased, in the ventilation system described in (1) above.

[0089] (6) The ventilation system described in (1) above, wherein the cooking status monitoring unit is a cooking utensil detection unit provided in the cooking appliance, and when the monitoring result indicates that the cooking utensil detection unit has detected that the cooking utensil has moved away from the heat source, the control unit determines that the cooking utensil has moved away from the heat source and sets the range hood fan airflow and / or filter rotation speed not to be increased.

[0090] (7) The ventilation system described in (6) above, wherein the cooking utensil detection unit includes, when the cooking appliance is a gas cooker, at least one of a pot bottom temperature sensor that detects the temperature of the cooking appliance placed on the gas cooker or a weight sensor that detects the weight of the cooking appliance placed on the gas cooker, and, when the cooking appliance is an IH cooker, includes at least one of a pot bottom temperature sensor that detects the temperature of the cooking appliance placed on the IH cooker, a weight sensor that detects the weight of the cooking appliance placed on the IH cooker, or a current change detection unit that detects current changes in a coil built into the cooking appliance.

[0091] (8) The ventilation system described in 1 above, wherein the cooking status monitoring unit is a camera that captures an image of a cooking appliance, and the control unit, when the monitoring result shows that the cooking appliance has moved by more than a predetermined value when comparing the current image captured by the camera with an image captured a predetermined time ago, determines that the cooking appliance has moved from the heat source and sets the range hood fan volume and / or filter rotation speed not to be increased.

[0092] (9) A ventilation system as described in any of (2) to (8) above, wherein the control unit cancels a setting that does not increase the airflow of the range hood fan and / or the rotation speed of the filter when the monitoring results determine that the cooking utensil has been moved away from the heat source and then returned to the heat source.

[0093] (10) A ventilation system as described in any of (2) to (8) above, in which, when the cooking appliance has a plurality of heat sources, the control unit, when the monitoring result determined by the cooking status monitoring unit that the cooking appliance has moved from one of the plurality of heat sources, does not set the range hood fan volume and / or filter rotation speed to not increase based only on the movement from one of the heat sources.

[0094] (11) A ventilation system described in any of (2) to (9) above, wherein the cooking status monitoring unit has a transmitting unit provided in the cooking appliance for transmitting the heating and non-heating status, and a receiving unit provided in the range hood for receiving the heating and non-heating status transmitted from the transmitting unit.

[0095] (12) A ventilation system as described in any one of (2) to (9) above, in which the movement of the cooking utensil from the heat source is determined on at least one of the range hood side and the cooking appliance side.

[0096] (13) A ventilation system as described in any of (2) to (9) above, wherein the control unit further sets the range hood fan airflow and / or filter rotation speed not to be increased when the cooking status monitoring unit determines that the heat source of the cooking appliance is not being heated.

[0097] (14) A ventilation system as described in any of (2) to (9) above, further comprising an alarm unit that notifies of movement of the cooking utensil, and the control unit activates the alarm unit when it determines that the cooking utensil has moved away from the heat source. [Explanation of symbols]

[0098] 100 range hoods, 110 main body, 112 Air intake, 114 exhaust vent, 116 Fans, 117 Fan motor, 118 filters, 119 Filter motor, 120 Operation panel, 121 Operation switch, 122 Air volume switch, 123 Automatic airflow switch, 124 Timer switch, 125 Light switches, 126 Continuous ventilation switch, 130 control section, 135 threshold temperature memory unit, 140 Information Department, 150 receiving unit, 200 cooking utensils, 210, 210A, 210B, 210C heat source, 220 Grill outlet, 230, 230A, 230B, 230C Cooking utensil detector, 250 Cookware, 260 Transmitter, 300 Compound eye temperature sensor, 400 cameras.

Claims

1. A cooking state monitoring unit having a camera for capturing an image of the cooking appliance; A control unit that controls an operating state of the range hood based on the monitoring result by the cooking state monitoring unit, A ventilation system in which the control unit determines whether the cooking utensil has been moved from the heat source after heating has started by the heat source based on the monitoring result after heating of the cooking utensil has started by the heat source, and controls the operating state of the range hood based on the determination.

2. The ventilation system of claim 1, wherein the control unit sets the range hood fan volume and / or filter rotation speed not to be increased when the control unit determines based on the monitoring results that the cooking utensil has been moved away from the heat source.

3. The ventilation system of claim 2, wherein the control unit determines that the cooking utensil has moved from the heat source when the monitoring result shows that the cooking utensil has moved by more than a predetermined value when comparing a first captured image at a first time after the start of heating with a second captured image a predetermined time after the first time.

4. In the case where the cooking device has a plurality of the heat sources, The ventilation system described in claim 2 or 3, wherein when the control unit determines based on the monitoring results that the cooking utensil has moved away from one of the multiple heat sources, the control unit does not set the range hood fan volume and / or filter rotation speed to be increased based only on the movement away from one of the heat sources, but controls the operating state of the range hood based on the monitoring results of other heat sources.

5. The ventilation system of claim 2 or 3, wherein the control unit cancels a setting that does not increase the airflow of the fan of the range hood and / or the rotation speed of the filter when the monitoring result determines that the cooking utensil has been moved from the heat source and then returned to the heat source.

6. The ventilation system described in claim 2 or 3, wherein the cooking status monitoring unit has a transmitting unit provided in the cooking appliance that transmits the heating and non-heating status, and a receiving unit provided in the range hood that receives the heating and non-heating status transmitted from the transmitting unit.

7. 4. The ventilation system according to claim 2, wherein the movement of the cooking appliance from the heat source is determined on at least one of a range hood side and a cooking appliance side.

8. The ventilation system of claim 2 or 3, wherein the control unit further sets the range hood fan air volume and / or filter rotation speed not to be increased when the cooking status monitoring unit determines that the heat source of the cooking appliance is not being heated.

9. Further, a notification unit that notifies the movement of the cooking utensil is provided, The ventilation system according to claim 2 or 3, wherein the control unit activates the notification unit when it determines that the cooking utensil has been moved away from the heat source.

Images