JP2008128579A - Ventilation equipment - Google Patents

Abstract

An object of the present invention is to provide a ventilator capable of efficiently ventilating air by sucking before odor or moisture generated by cooking by a cooking device diffuses indoors.
A ventilator 1 according to the present invention is provided directly above an IH cooker H, a fan 2 that faces the heating surface of the IH cooker H, and sucks in odor, moisture, and hot air generated by cooking. The fan 2 is housed inside, and a hood 3 is provided so as to be opposed to the heating surface of the IH cooker H. The hood 3 includes a hollow cone-shaped member 3a connected to the opening of the duct D and housings 3b to 3d connected to the lower portion of the hollow spindle-shaped member 3a.
[Selection] Figure 1

Description

  The present invention relates to a ventilator that performs indoor ventilation.

  Most kitchens are equipped with a ventilator (ventilator) to discharge the heat, humidity, odor, and combustion gas emissions from cooking (when a gas stove is installed) to the outdoors. The position where the ventilation fan is provided is not limited to the ceiling, but can be in the vicinity of a heating means such as a gas stove or an induction heating (IH) cooker (for example, below the wall surface or the heating means).

  In order to ventilate efficiently, ventilation fans having various functions have been proposed. For example, a temperature sensor is provided, and when the temperature sensor detects a temperature above a certain level, the heating means is judged to be heating and the ventilation device is automatically driven to perform ventilation (see Patent Document 1). If the humidity sensor detects humidity above a certain level, the ventilation device is driven to ventilate (see Patent Document 2), and the ventilation device is driven to ventilate according to the ON / OFF of the heating means (Patent Document) 3)).

With such a ventilation device, ventilation can be automatically performed at an appropriate timing.
JP-A-11-141936 JP-A-11-23027 JP 2002-206758 A

  By the way, in recent years, the spread of IH cookers is remarkable. Since the IH cooker heats cooking using electromagnetic induction, no combustion gas is generated. For this reason, it is not necessary to discharge the combustion gas as in a gas cooker (gas stove) that uses gas to heat, so that the amount of ventilation can be reduced.

  In addition, when cooking is performed using an IH cooker that does not generate combustion gas, the updraft generated with heating cooking is weaker than the upflow generated when the cooker that generates combustion gas is used. Become. Since this updraft flows upward, when a ventilator is provided on the ceiling or wall, it also serves to induce odors and moisture associated with cooking to the ventilator.

  However, if cooking is performed using an IH cooker that does not generate combustion gas, the rising airflow is weak, so there is a risk that odors and moisture may diffuse before reaching the ventilator installed on the ceiling or wall. It was.

  Therefore, the present invention provides a ventilator that can efficiently ventilate before the odor and moisture generated by cooking with a cooking device that does not generate combustion gas are diffused indoors. Let it be an issue.

The present invention has been made in view of the above matters, and the present invention is located above the heating cooker and is provided in the vicinity of the opening of the exhaust duct, the exhaust duct communicating the indoor and the outdoors, and the heating cooker A fan that inhales the air above the air and exhausts the air to the outside through an exhaust duct, and a hood that is positioned directly above the heating means, houses the fan inward, and covers the periphery thereof. , It has an expansion / contraction means that allows the opening to move to the cooking device side.

  The cooking device according to the present invention includes a gas cooking device (a stove), an electric cooking device, an IH cooking device, and the like. In particular, since the electric cooker and the IH cooker do not generate combustion gas, the upward airflow generated by cooking is weak. For this reason, the rising airflow containing moisture and odor diffuses before reaching the ventilation device provided on the ceiling or wall, and the odor and moisture are easily spread indoors.

  However, the ventilator of the present invention can bring the opening of the hood closer to the side of the heating cooker by stretching the expansion / contraction means provided in the hood located immediately above the heating cooker. Thereby, it is possible to inhale before moisture and odor diffuse indoors, and a comfortable indoor environment can be maintained.

  In addition, since the distance (height position) from the cooking device to the opening of the hood can be freely changed by the expansion / contraction means, the intake air amount can be adjusted depending on the cooking state. For example, when frying odorous ingredients with oil, in order to inhale immediately, inhale the air with the opening of the hood close to the side of the frying pan where you are cooking, and on the contrary, cooking that does not generate much odor or moisture In this case, the intake amount is adjusted by moving the hood opening away from the frying pan.

  As described above, according to the present invention, it is not necessary to increase the fan capacity in order to adjust the intake air amount, and the ventilation device itself can be downsized. In addition, according to the present invention, it is possible to reduce the operating noise in the ventilation device.

  Further, according to the present invention, the hood is stretched and brought closer to the heating means only when intake is necessary during cooking, and the hood is shrunk and stored on the ceiling side when not cooking. Thereby, the presence (weight feeling) in the ceiling at the time other than cooking of the ventilator provided on the ceiling can be reduced.

  In addition, the expansion / contraction means according to the present invention arranges the frames having different diameters on the same position plane so as to move sequentially from the outer frame to the opening side at the time of extension, and to the opening. It can be formed so as to become larger in diameter. The frame body may be in accordance with the design and specifications of the ventilation device, such as a housing or a cylinder.

  As a result, the lowermost frame becomes the frame with the largest diameter, and the hood is attached to the periphery of the frame. Therefore, when the hood is pulled down (on the heating cooker side), the frame body slides in order from the lowermost frame body, and the height position of the opening portion of the hood can be changed.

  Thus, the ventilator of the present invention can extend the expansion / contraction means when in use and can contract when not in use, so that the feeling of weight on the ceiling or wall by the ventilator can be reduced.

In addition, the expansion / contraction means according to the present invention may be configured to include an expansion / contraction section that can be folded by overlapping adjacent surfaces divided by a fold line. Examples of the expansion / contraction means include a hollow bellows member or a structure in which a frame body having a different size can be folded. In addition, by forming the bellows member so that it can be expanded and contracted and bent in the vertical and horizontal directions, the bellows member can be suitably used for a ventilator provided at a position slightly away from the heating cooker. In this case, the hood is pulled laterally, the bellows member is stretched, and the hood opening is pulled down so as to face the cooking device side. By using such a bellows member, even when the ventilation device and the heating cooker are not opposed to each other, it is possible to inhale and ascend the rising airflow generated by the cooking.

  Furthermore, the present invention provides a winding device that winds up the proximal end of a wire that is provided on the inner wall of the exhaust duct and whose tip is attached to the opening of the hood, and operates the winding device in the direction of winding the wire. Alternatively, an operation means for performing an operation to operate in the direction of extending the wire may be further provided. The operation means is an operation switch for operating the winding device, and can be provided together with the operation switch of the cooking device or a remote control type operation switch.

  With such a configuration, the expansion / contraction means expands and contracts with the movement of the wire. That is, the expansion / contraction means can be expanded and contracted by operating the operation means. Thereby, even if it is a user who cannot reach the height of the state where the hood is not lowered, the ventilator of the present invention can be used.

  The ventilator according to the present invention further includes a detection unit that is provided in the hood and detects a cooking state, and a control unit that operates the winding device according to a detection result by the detection unit and performs expansion / contraction control of the expansion / contraction unit. It is good also as a structure provided. When cooking is performed, the temperature changes, the humidity changes, and an odor is generated depending on the food. Therefore, the detection means can be a temperature detection means for detecting temperature, a temperature detection means for detecting humidity, or an odor detection means for detecting odor according to the cooking state. In addition, as long as the detection means is a position close to the heating cooker, the detection means may be provided in any location of the hood. Preferably, it can be near the opening of the hood.

  Furthermore, the control means according to the present invention may be configured to execute control for changing the rotational speed of the fan in accordance with a detection result by the detection means. For example, when the detection means is a temperature detection means, if the detection result indicates that the temperature is higher than a predetermined value, the control means increases the number of rotations of the fan and controls if the detection result indicates that the temperature is lower than the predetermined value. The means executes control for reducing the rotational speed of the fan. Further, when the detection means is a humidity detection means, if the detection result indicates that the humidity is higher than the predetermined value, the control means increases the rotation speed of the fan, and if the detection result indicates that the humidity is lower than the predetermined value, the control means. Executes control to reduce the rotation speed of the fan. Further, when the detection means is an odor detection means, if the detection result indicates that the detected odor value is equal to or greater than a predetermined value, the control means increases the number of rotations of the fan, and the detected odor value is equal to or less than the predetermined value. If the detected result is, the control means executes control to lower the rotational speed of the fan.

  Thus, by providing the detection means and the control means, it is possible to automatically lower the hood even when the hands cannot be released during cooking or when the operation means is forgotten. Or, since the intake force can be changed by increasing or decreasing the rotational speed of the fan, ventilation can be performed reliably.

  Moreover, the ventilation apparatus of this invention can also be performed combining the expansion / contraction control and the control which changes rotation speed based on the detection result by a detection means. For example, when cooking at midnight or for the purpose of power saving, the control means performs control to lower the hood and lower the rotational speed of the fan. As a result, it is possible to efficiently perform intake air with a small number of revolutions and to expect a silencing effect.

  Further, when a strong odor is generated during cooking (for example, when cooking grilled fish or grilled meat), the control means performs control to lower the hood to the lowest level and increase the rotational speed of the fan. As a result, the intake can be performed efficiently and rapidly before the odor spreads.

Furthermore, when there is a feeling of weight in the presence of the ventilator, such as when cooking with a visitor or in an island-type kitchen, the control means performs control to raise the hood to the top and increase the rotation speed.
Thereby, not only can the weight of the ventilator be reduced, but also intake can be performed reliably.

  ADVANTAGE OF THE INVENTION According to this invention, the ventilation apparatus which can inhale and efficiently ventilate before the odor and moisture which generate | occur | produce with the cooking by the heating cooker which does not generate | occur | produce a combustion gas spread | diffuse indoors can be provided. It becomes possible.

  Hereinafter, the ventilator according to the present embodiment will be described in detail with reference to the drawings. In addition, although the ventilation apparatus of this embodiment demonstrates as what is provided in the kitchen which uses the existing IH (Induction Heating) cooker which made the heating means by electromagnetic induction as a heating cooker, It is not limited, It can use suitably also for the kitchen which used the gas cooker and the electric cooker as a heating cooker.

<Example 1>
The figure of the use condition of the ventilation apparatus 1 of this embodiment is shown in FIG. The ventilation device 1 opposes the heating surface of the IH cooker H, and sucks in odor, humidity, and hot air generated by cooking, and the fan 2 is housed inside and on the heating surface of the IH cooker H. And a hood 3 protruding so as to face each other.

  Moreover, the control block diagram of the ventilation apparatus 1 in a present Example is shown to A in FIG. The ventilation device 1 of the present embodiment includes a control microcomputer 4 that performs electrical control of the entire device, a fan drive switch 5 that generates a signal for causing the control microcomputer 4 to drive the fan 2, and a fan drive that drives the fan 2. Circuit 6.

  Further, as shown in FIG. 1, the hood 3 in this embodiment is connected to a hollow cone-shaped member 3a connected to an opening of a duct D that communicates indoors and outdoors, and a lower part of the hollow spindle-shaped member 3a. Housings (frame bodies) 3b to 3d. The fan 2 is fixed so as to be positioned in the hollow of the hollow spindle member 3a and the housing 3b.

  As shown in FIG. 3, the housings 3 b to 3 d have different sizes. In the present embodiment, the casing located at the lowermost position (the one closest to the IH cooker H) is the largest casing 3d. Accordingly, the housing 3c is housed inside the housing 3d, and the housing 3b is housed inside the housing 3c.

  The housing 3b is hollow and has openings 7a and 7b on the top and bottom. A hollow spindle member 3a is attached to the upper part of the housing 3b. On the other hand, a flange 8 extending outward from the outer surface of the housing 3b is formed on the periphery of the lower portion of the housing 3b.

  Similarly to the housing 3b, the housing 3c is hollow and has openings 9a and 9b on the top and bottom. The size and shape of the opening 9a at the top of the housing 3c are formed to be substantially the same as the outer diameter and the outer shape of the housing 3b. In other words, the opening 9a of the housing 3c has a size and shape that allows the housing 3b to be inserted, and the edge 10 is formed on the periphery of the opening 9a. On the other hand, a flange 11 that extends outward from the outer surface of the housing 3c is formed on the periphery of the lower portion of the housing 3c.

  Furthermore, the housing 3d is also hollow inside and similar to the housings 3b and 3c, and has openings 12a and 12b at the top and bottom. In this embodiment, the opening 12b provided in the lower part of the housing 3d is the opening of the hood 3.

The size and shape of the opening 12a at the top of the housing 3d are formed to be substantially the same as the outer diameter and the outer shape of the housing 3c. That is, the opening 12a of the housing 3d has a size and shape that can fit the outer shape of the housing 3c, and the edge 13 is formed on the periphery of the opening 12a. On the other hand, no flange is formed on the periphery of the lower portion of the housing 3d, and only the opening 12b is formed. Note that a handle portion T is provided on a side surface or a lower end portion of the housing 3d to be gripped when the user raises or lowers the housing 3d. The position of the handle portion T is not limited to this location as long as the user can easily use it.
The above is the structure of the housings 3b to 3d.

  As shown in FIG. 3, in order to make these housings 3b to 3d fully stretched, the housing 3d is pulled downward (IH cooker H side), and the flange 9 and the housing of the housing 3b are placed. The edge portion 10 of the body 3c is engaged, and the flange portion 11 of the housing 3c and the edge portion 13 of the housing 3d are engaged.

  Moreover, in order to return the housings 3b to 3d to their original positions, by pushing up the housing 3d upward (on the side of the hollow spindle member 3a), the engagement state between the respective flanges and edges is released, The housing 3c moves into the housing 3d, and the housing 3b moves into the housing 3c to return to the original position. In the present embodiment, the case has been described as three cases stacked, but the number of cases is determined according to the usage environment (for example, depending on the height of the ceiling, the position of the duct, etc.) and the specifications desired by the user. It can be increased or decreased. Thereby, the versatility and customizability of the ventilation apparatus of a present Example can be improved.

  As described above, the casings 3b to 3d are expanded and contracted, and the opening of the hood 3 (the opening 12b of the casing 3d) is moved toward the IH cooker H side, so that the heating by the IH cooker H is performed. The ascending airflow generated by cooking can be caught at a low position and sucked by driving the fan 2.

  Thereby, it can prevent as much as possible that the smell and humidity accompanying the heat cooking by the IH cooker H are spread | diffused indoors. Therefore, the ventilation apparatus 1 of a present Example has the kitchen installed independently in the center of a room, and can use it suitably for the island type kitchen which an odor and humidity are easy to fill indoors with cooking.

<Example 2>
The ventilator of the present embodiment is characterized in that a bellows member is used as a hood expansion / contraction means. Note that the ventilator of the present embodiment differs from the ventilator 1 of the first embodiment only in the hood expansion / contraction means, and therefore, the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is simplified.

  FIG. 5 shows the ventilation device 1 of the present embodiment. In the ventilation device 1 of the present embodiment, a bellows member 14 is provided between the duct D and the hood 3. The bellows member 14 has a hollow inside and is open at the top and bottom. The upper part of the bellows member 14 is connected to the opening of the duct D, and the lower part of the bellows member 14 is connected to the hood 3. Although not shown, the fan in this case is located inside the bellows member 14.

  In this case, when the hood 3 is pulled down to the IH cooker H side, the bellows member 14 is extended, and the opening height position of the hood 3 is lowered. Thereby, the ascending airflow generated with cooking can be caught at a low position, and it is possible to prevent odors and moisture from diffusing into the room.

  Moreover, as another aspect of a present Example, as shown in FIG. 6, the aspect which provided the bellows member in opening of the food | hood 3 can be illustrated. In this case, the bellows member 14 is directly pulled to the IH cooker H side for intake.

<Example 3>
Although the above-described ventilators of Examples 1 and 2 have been described on the assumption that the user manually lifts and lowers the hood, the ventilator of the present embodiment is characterized by lifting and lowering the hood by operating an operation switch. To do. In the description of the present embodiment, since the configuration is the same as that of the ventilation apparatus of the first embodiment, the same reference numerals as those in the first embodiment are attached to the same configurations, and the description is simplified.

  As shown in FIGS. 7 and 8, in the ventilation device 1 of the present embodiment, the winding device 16 holding the wire 15 is fixed to the inner wall of the exhaust duct D. It is assumed that the winding device 16 of this embodiment incorporates a motor (not shown) as a drive source.

  Further, the wire 15 has a distal end attached to the opening 12b side inside the hood 3 (a housing 3d in this embodiment), and a proximal end is wound around the winding device 16.

  Further, as shown in FIG. 9, the ventilation device 1 of the present embodiment is provided with an operation switch (operation means) 17 for operating the winding device 16 that moves the hood 3 up and down. The operation switch 17 includes a switch for lowering the opening position of the hood 3 and a switch for returning (raising) the hood 3 to its original position.

  Further, the operation switch 17 may be provided on the side surface of the hood 3 as shown in FIG. 9A, or may be provided together with the operation unit of the IH cooker H, and the receiving unit is provided in the ventilation device 1. The operation switch 17 may be provided in the remote controller device.

  Moreover, the control block diagram of the ventilation apparatus 1 of a present Example is shown to B in FIG. The ventilator 1 of the present embodiment has a configuration (control microcomputer 4, fan drive switch 5, fan drive circuit 6) for driving the fan 2, like the ventilator 1 of the first embodiment.

Furthermore, the ventilation device 1 of the present embodiment further includes a winding device drive circuit 18 for driving the winding device 16. Thus, when the operation switch 17 is operated, the control microcomputer 4 outputs a drive instruction to the winding device drive circuit 18.
The above is the configuration of the ventilation device 1 of the present embodiment.

  Next, the raising / lowering operation | movement of the hood 3 in the ventilation apparatus 1 of a present Example is explained in full detail. The hood 3 is in a state where the casings 3b to 3d of the hood 3 are overlapped (not extended) as shown in FIG. 7 because the switch for raising (the operation switch 17) has already been operated, that is, It is assumed that the wire 15 is completely wound by the winding device 16. That is, it is assumed that the wire 15 completely wound by the winding device 16 is in a suspended state with the casings 3b to 3d being stacked.

  When the switch (operation switch 17) for lowering the hood 3 is operated, the control microcomputer 4 causes the drive circuit 18 to operate the winding device 16 opposite to the winding of the wire 15, that is, the wire 15 is moved downward. An instruction is output to execute the operation of extending to (IH cooker H side). Thereby, the wire 15 extends to the IH cooker H side, and the housings 3b to 3d that are accommodated and overlapped with each other are pulled out. By pressing the operation switch 17 again, the operation of the winding device 16 is stopped and the casings 3b to 3d are suspended from the wire 15, and the casings 3b to 3d are pulled out at that position. Can be stopped. That is, the user can stop the pulled-out state of the housings 3b to 3d at an arbitrary position according to the use state and the use mode. Thereby, usability can be improved.

Moreover, anyone can perform the raising / lowering operation | movement of the food | hood 3 by providing the operation switch 17 with the operation part of IH cooking appliance H, or setting it as a remote controller apparatus. That is, the universal design of the ventilation device can be achieved.

<Example 4>
The ventilator of the present embodiment is characterized in that the opening position of the hood can be automatically adjusted according to the degree of odor generated by cooking. In addition, since the ventilation apparatus of a present Example is the structure similar to the ventilation apparatus of Example 3, the same code | symbol is attached | subjected to the same structure as Example 3, and description is simplified and it demonstrates in detail about a different structure.

  As shown in FIGS. 10 and 11, the ventilation device 1 of the present embodiment includes an odor sensor (detection means) 19. In the present embodiment, the odor sensor 19 is provided in the vicinity of the opening 12b of the housing 3d of the hood 3. However, the position is not limited to the position as long as the odor sensor 19 can easily detect the odor generated during cooking.

  Moreover, the control block diagram of the ventilation apparatus 1 of a present Example is shown to C in FIG. The ventilator 1 of the present embodiment, like the ventilator 1 of the third embodiment, has a control microcomputer 4 that controls the driving of the fan 2 and a fan drive circuit 6 that drives the fan 2 in response to a signal from the control microcomputer 4. And a fan drive switch (operation switch of this embodiment) 5 that issues a drive signal (including drive start and drive stop) of the fan 2 to the control microcomputer 4 and a winding device drive circuit 18. In the present embodiment, since the winding device 16 is automatically controlled and operated by operating the operation switch 5, the operation switch 17 is not necessary directly. However, when the operation switch 17 is operated, the third embodiment is used. As shown in FIG.

Further, the ventilator 1 has an arithmetic circuit 20 that converts an output voltage from the odor sensor 19 into a signal, and a sensor microcomputer 21 that receives the converted signal. The sensor microcomputer 21 receives the signal converted by the arithmetic circuit 20, sets and updates the reference value of the value indicating the odor detected by the odor sensor 19, and controls the control microcomputer 4 according to the amount of change with respect to the reference value. A signal is output to the fan drive circuit 6 via The sensor microcomputer 21 has a built-in memory (not shown) that stores history information of values indicating the odor detected by the odor sensor 19 and information such as a reference value indicating the strength of the value. . A reference value indicating the strength of the odor is stored as a preset value.
The above is the configuration of the ventilation device 1 according to the fourth embodiment.

Next, operation control by the ventilator 1 of the fourth embodiment will be described. FIG. 12 shows an operation flow of the ventilation device 1 of the present embodiment.
When the fan drive switch (operation switch) 5 (see FIG. 2) is operated and turned on (S01), the control microcomputer 4 confirms that the winding device 16 is completely winding the wire 15 ( S02), the fan 2 is driven to rotate (S03), and a normal low-speed ventilation state is set (S04: low fan rotation speed).

  Next, the sensor microcomputer 21 determines whether or not the odor sensor 19 has detected an odor, and outputs the determination result to the control microcomputer 4 (S05). Here, when the sensor microcomputer 21 determines that an odor has been detected (when the sensor microcomputer 21 outputs to the control microcomputer 4), the control microcomputer 4 sends a signal for performing an operation of extending the wire 15 to the winding device drive circuit 21. , The winding device 16 is activated, and the opening position of the hood 3 is lowered (S06). That is, the control microcomputer 4 outputs a signal for making the opening height of the hood 3 as close as possible to the IH cooker H side (downward), and the winding device drive circuit 21 operates the winding device 16 when receiving this signal. Let

Then, the wire 15 extends, and the housing 3b of the hood 3 that has been accommodated by overlapping each other.
3d is completely pulled out. Note that while the sensor microcomputer 21 detects the odor, the control microcomputer 4 maintains the process of step 06 (“hood down”). If the opening position of the hood 3 is already in the lowered state, the control microcomputer 4 passes the process of step 06 (“hood down”) and proceeds to the determination process of step 07.

  In the determination process of S07, the sensor microcomputer 21 determines whether there is a large difference (that is, whether the odor is strong) in the comparison between the value indicating the odor detected by the odor sensor 19 and the reference value (including the history value). The judgment is made and the judgment result is output to the control microcomputer 4.

  As a result of the determination process of S07, when it is determined that there is no large difference from the reference value (no odor is strong) (when there is no output from the sensor microcomputer 21 to the control microcomputer 4), the control microcomputer 4 proceeds to the process of step 04 Then, a normal low-speed rotation ventilation state (lowering the fan rotation speed) is set, and the processing from step 05 is repeated.

  On the other hand, when the sensor microcomputer 21 determines that there is a large difference (strong smell) from the reference value (when the sensor microcomputer 21 outputs to the control microcomputer 4), the control microcomputer 4 increases the rotational speed of the fan 2. A signal for increasing the intake force is output to the fan drive circuit 6 (S08: high fan rotation speed), and the determination process in step 07 is repeated.

  On the other hand, if it is determined in step 05 that no odor has been detected (no output from the sensor microcomputer 21 to the control microcomputer 4), the process proceeds to step 09. In step 09, the control microcomputer 4 determines whether or not the hood 3 is in the lowered state as compared with the state in which the wire 15 is being wound. If the hood 3 is in the lowered state, the winding device drive circuit 21 outputs a signal ("hood rise") for returning the hood 3 to its original state (a state in which the housings 3b to 3d are accommodated in an overlapping manner). The winding device drive circuit 21 that has received this signal operates the winding device 16 to wind up the wire 15 and raise the opening position of the hood 3. If the opening position of the hood 3 is already in the raised state, the control microcomputer 4 passes the process of step 09 (“hood rise”) and proceeds to the process of step 10.

  In step 10, it is determined whether or not a heating switch for starting heating provided in the IH cooker H is OFF, although not shown. Here, when the control microcomputer 4 determines that the heating switch is OFF, the control microcomputer 4 executes control to stop the rotation drive of the fan 2 (S11), and this control ends.

  On the other hand, if the control microcomputer 4 determines in step 10 that the heating switch is not OFF, the process returns to step 05 and the subsequent processing is repeated.

  In addition, the control microcomputer 4 of Example 4 adjusts the rotation speed of the fan 2 by the difference between the value indicating the odor detected by the odor sensor 19 and the reference value (or the history value detected last time). For example, if there is no significant difference between the value detected this time and the previously detected history value, the sensor microcomputer 21 outputs a signal to decrease the rotational speed of the fan 2 and weaken the intake force, and if the difference is large It is also possible to output a signal that increases the suction speed by increasing the number of rotations of the fan.

  When there is not much difference between the value indicating the odor detected by the odor sensor 19 and the reference value, the control microcomputer 4 lowers the opening of the hood 3 to the IH cooker H side (downward) until the state shown in FIG. It may be determined that there is no need, and a signal that moves to a predetermined height position (for example, a position where only the housing 3d is stretched) may be output. In this configuration, when the winding device drive circuit 21 receives this signal, the winding device 16 operates and the wire 15 extends until the opening of the hood 3 moves to its height.

  Further, when the control microcomputer 4 receives an OFF (operation end instruction) signal of the operation switch (fan drive switch) 5 during the operation control of the ventilator 1, the control microcomputer 4 returns a signal for returning the hood 3 to the original state. ("Hood rise") is output to the winder drive circuit 21, and the winder 16 is operated to raise the opening position of the hood 3 and to provide a sequence control function for stopping the rotational drive of the fan 2. Also good.

  As described above, according to the ventilation device 1 of the present embodiment, the opening of the hood 3 can be automatically raised or lowered according to the strength of the odor. As a result, before the odor diffuses into the room, the opening position of the hood 3 can be automatically lowered to inhale, and the indoor environment can be kept normal.

  Further, since the intake power can be changed by increasing or decreasing the rotational speed of the fan depending on the degree of odor, the indoor environment can be kept constant.

  Furthermore, because the hood 3 is automatically moved up and down based on the detection result of the odor sensor 19, it is forgotten that the hood 3 can be lifted when cooking cannot be released or when the hood 3 is concentrated on cooking. However, indoor ventilation can be performed reliably.

  As mentioned above, according to the ventilation apparatus of Examples 1-4, even if it is a case where it cooks with an IH cooker with a weak ascending airflow generated at the time of cooking, the opening position of the hood of the ventilation apparatus is Intake can be performed while moving toward the IH cooker. As a result, since the intake air can be efficiently taken in before the odor or moisture diffuses into the room, the room environment can be kept normal (constant).

  In addition, since the indoor environment can be kept normal, the ventilators of Examples 1 to 4 can be used as a ventilator in an island kitchen where the kitchen is independent and odors and moisture are likely to diffuse into the room during cooking. It can be used suitably.

  Furthermore, according to the ventilators of Examples 1 to 4, the hood can be extended and brought closer to the heating means only when intake is required during cooking, and the hood can be shrunk and stored on the ceiling side when not cooking. Thereby, in the island type kitchen where the presence (weight) of the ventilation device on the ceiling is conspicuous, it is possible to reduce the presence of the ventilation device (weight on the ceiling) at times other than cooking.

It is a figure which shows the specification state of the ventilation apparatus in Example 1. FIG. It is a control block diagram of the ventilator in Examples 1-4. It is a perspective view of the state where the hood concerning Example 1 was extended. It is a perspective view of the state which shrunk (accommodated) the hood which concerns on Example 1. FIG. It is a figure which shows the ventilation apparatus in Example 2. FIG. It is a figure which shows the ventilation apparatus in Example 2. FIG. It is a figure which shows the state which the hood | hood of the ventilator in Example 3 shrunk (accommodated). It is a figure which shows the state which extended the food | hood of the ventilation apparatus in Example 3. FIG. FIG. 10 is a diagram illustrating the position of an operation switch according to the third embodiment. It is a figure which shows the state which the hood | hood of the ventilator in Example 4 shrunk (accommodated). It is a figure which shows the state which extended the hood of the ventilator in Example 4. FIG. It is a control flow of the ventilation apparatus in Example 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ventilator 2 Fan 3 Hood 3a Hollow cone-shaped member 3b-3d Housing | casing (expandable means, frame)
4 Control microcomputer (control means)
5 Fan Drive Switch 6 Fan Drive Circuit 7a, 7b Opening 8 Edge 9 Edge 9a, 9b Opening 10 Edge 11 Edge 12a, 12b Opening 13 Edge 14 Bellows Member 15 Wire 16 Winding Device 17 Operation Switch (Operation means)
18 Winding device drive circuit 19 Odor sensor (detection means)
20 Arithmetic circuit 21 Sensor microcomputer D Exhaust duct H IH cooker (heating cooker)
T handle part

Claims (6)

An exhaust duct that is located above the heating cooker and communicates indoors and outdoors;
A fan that is provided near the opening of the exhaust duct, sucks air above the heating means, and exhausts the air to the outside through the exhaust duct;
Located directly above the heating means, the fan is housed inside, and a hood that covers the periphery thereof is provided,
The ventilator characterized in that the hood has an opening on the heating means side, and has an expansion / contraction means that allows the opening to move to the heating means.   The expansion / contraction means arranges frames having different diameters on the same position plane and moves sequentially from the frame positioned outward at the time of extension toward the opening, and increases in diameter toward the opening. It forms so that it may become. The ventilation apparatus of Claim 1 characterized by the above-mentioned.   The ventilating apparatus according to claim 1, wherein the expansion / contraction means includes an expansion / contraction part that can be folded when adjacent surfaces divided by a fold line overlap each other. A winding device that winds up a proximal end of a wire that is provided on the inner wall of the exhaust duct and has a distal end attached to the opening side of the hood;
And an operating means for operating the winding device in the direction of winding the wire or operating the winding device in the direction of extending the wire.
The ventilator according to any one of claims 1 to 3, wherein the expansion / contraction means expands and contracts with the movement of the wire. A detecting means provided in the hood for detecting a cooking state;
The ventilation device according to claim 4, further comprising a control unit that operates the winding device according to a detection result of the detection unit to execute expansion / contraction control of the expansion / contraction unit.   The ventilation device according to claim 5, wherein the control unit executes control for changing a rotation speed of the fan in accordance with a detection result by the detection unit.

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