JP2008249321A - Range hood system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a range hood system capable of effectively detecting or exhausting various gases by preventing staring miss and stopping miss of an exhaust fan. <P>SOLUTION: This range hood system has a range hood body 2 partitioning an exhaust passage, a main fan 3 and a sub-fan 4 exhausting gas via the exhaust passage, a gas sensor 5 arranged in the vicinity of the range hood body 2, and a control part for controlling at least the main fan 3 and the sub-fan 4 based on output from this gas sensor 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a range hood system for controlling an exhaust means of a range hood based on an output from a gas sensor.

  Conventionally, a range hood is disposed above the stove to exhaust odors and hot air generated when cooking using a stove fire in the kitchen to the outside of the kitchen. In particular, it is now popular to install an open kitchen in a general house, and the odor from this open kitchen tends to flow out into the living room. Function is becoming more and more important.

  Such a range hood has conventionally been provided with an exhaust fan and a start switch, and the exhaust fan can be started or stopped by a user manually operating the start switch. However, in the conventional range hood, the start or stop of the exhaust fan is left to manual operation in this way, so the odor stays in the room because the start of the exhaust fan is forgotten or the power is forgotten to stop the exhaust fan. Could be wasted.

  On the other hand, conventionally, an odor sensor for detecting an odor component in a monitoring area and a system for automatically starting and stopping an exhaust fan based on the output of the odor sensor have been proposed. For example, Patent Document 1 discloses that a toilet air conditioner is provided with a fan and an odor sensor (odor sensor), and the fan is started and stopped based on the output of the odor sensor (paragraphs 0065 to 0067). ). Therefore, by applying such an odor sensor to the range hood, it is possible to prevent forgetting to start or stop the exhaust fan.

JP-A-10-38307

  However, simply applying the odor sensor to the range hood has various possibilities that the exhaust fan cannot be started and stopped properly. For example, the fine particles that cause odors diffuse and rise due to the hot air flow during cooking, so they stay in the vicinity of the ceiling or easily flow out into the living room along the ceiling. It was possible that the odor could not be effectively discharged by collecting air from Moreover, since the gas at the time of gas leakage stays from the upper part of the room, it is difficult to inhale the gas above the kitchen in the range hood even if it tries to ventilate. Therefore, there was a risk of damaging the human body.

  The present invention has been made in view of the above, and provides a range hood system that can prevent forgetting to start or stop an exhaust fan and can detect or discharge various gases effectively. For the purpose.

  In order to solve the above-described problems and achieve the object, the range hood system according to claim 1 includes a range hood main body that defines an exhaust path, an exhaust unit that exhausts air through the exhaust path, and the range. A first gas sensor disposed in the vicinity of the hood main body, and a control unit that controls at least the exhaust unit based on an output from the first gas sensor.

  The range hood system according to claim 2 is the range hood system according to claim 1, wherein the control means sets the output level from the first gas sensor to a predetermined discharge threshold value while the exhaust means is stopped. When it exceeds, the exhaust means is started.

  The range hood system according to claim 3 is the range hood system according to claim 1 or 2, wherein when the control unit performs activation of the exhaust unit, the total number of times of the activation is predetermined gas discharge completion. The exhaust means is stopped when the number of times is reached.

  The range hood system according to claim 4 is the range hood system according to any one of claims 1 to 3, wherein the control means collects air by activating the exhaust means, and Predetermined control is performed based on the output from the first gas sensor.

  The range hood system according to claim 5 is the range hood system according to any one of claims 1 to 4, wherein the exhaust means includes a first exhaust opening formed on a lower surface of the range hood. A first exhaust unit that collects air through the second hood, and a second exhaust unit that collects air through a second exhaust opening formed in the upper side surface of the range hood. When the output from the first gas sensor exceeds a predetermined discharge threshold, the second exhaust means is activated.

  The range hood system according to claim 6 is the range hood system according to claim 5, wherein the control means collects air by activating the second exhaust means, and the first means in the air collection When the output from one gas sensor exceeds a predetermined gas warning threshold, the first exhaust means is activated.

  The range hood system according to claim 7 is the range hood system according to any one of claims 1 to 6, further comprising a second gas sensor arranged separately from the range hood, wherein the control means includes The predetermined control is performed based on the output from the first gas sensor and the output from the second gas sensor.

  The range hood system according to an eighth aspect of the present invention is the range hood system according to the seventh aspect, wherein the control means sets the output from the second gas sensor to a predetermined distant gas warning threshold while the exhaust means is stopped. When it exceeds, the discharge means is activated, and the output from the first gas sensor is within a predetermined gas arrival monitoring time from the time when the output from the second gas sensor exceeds a predetermined remote gas warning threshold. It is characterized in that it is determined whether or not a predetermined neighborhood gas warning threshold is exceeded, and predetermined control is performed based on the determination result.

  A range hood system according to claim 9 is the range hood system according to any one of claims 1 to 8, further comprising alarm output means for outputting an alarm, wherein the control means controls the alarm output means. And outputting an alarm.

  A range hood system according to claim 10 is the range hood system according to any one of claims 1 to 9, further comprising a gas level display means for displaying a gas level detected by the first gas sensor. It is characterized by that.

  The range hood system according to claim 11 is the range hood system according to any one of claims 1 to 10, wherein the gas sensor is an odor sensor.

  A range hood system according to claim 12 is the range hood system according to claim 1, wherein a removal means for removing a part of a substance contained in the air from the air, an inside and an outside of the removal means, And the first gas sensor is disposed in the vicinity of the range hood main body or the removal means, and the control means is based on an output from the first gas sensor. The exhaust means and the circulation means are controlled.

  In addition, the range hood system according to claim 13 is the range hood system according to claim 12, wherein the control means outputs a level of output from the first gas sensor while the exhaust means and the circulation means are stopped. When the air pressure exceeds a first threshold, the exhaust means is activated, and after the exhaust means is activated, the level of the output from the first gas sensor is less than or equal to a second threshold that is smaller than the first threshold. In this case, the exhaust means is stopped and the circulation means is started.

  Further, the range hood system according to claim 14 is the range hood system according to claim 12 or 13, wherein the control means outputs an output from the first gas sensor while the exhaust means and the circulation means are stopped. When the level of the first gas sensor exceeds the third threshold value, the circulating means is started, and after the elapse of a predetermined standby time from the starting of the circulating means, the output level from the first gas sensor is the fourth level. The exhaust means is activated when a threshold value is exceeded.

  Further, the range hood system according to claim 15 is the range hood system according to any one of claims 12 to 14, wherein the control means has a fifth output level from the first gas sensor. When the threshold value is exceeded, the circulation means is operated, and when the output level from the first gas sensor exceeds a sixth threshold value that is larger than the fifth threshold value, the exhaust means is operated. It is characterized by making it.

  The range hood system according to claim 16 is the range hood system according to any one of claims 12 to 15, wherein the range hood main body or the range hood system is used to detect a substance that cannot be removed by the removing means. A second gas sensor disposed in the vicinity of the removing means, and the control means operates the exhaust means when the output level from the second gas sensor exceeds a seventh threshold value. Features.

  A range hood system according to claim 17 is the range hood system according to claim 16, further comprising alarm output means for outputting an alarm, wherein the control means has an output level from the second gas sensor. When the seventh threshold value is exceeded, the alarm output means is controlled to output an alarm.

  The range hood system according to claim 18 is the range hood system according to any one of claims 12 to 17, wherein the range hood body and the removing means are integrally formed with each other. And

  According to the first aspect of the present invention, when the odor is filled in the room by controlling the exhaust means based on the output from the first gas sensor disposed in the vicinity of the range hood main body, the odor is removed. The indoor environment can be enhanced by automatically discharging to the outside, or the indoor safety can be enhanced by automatically discharging the CO or smoke to the outside when the room is filled with CO or smoke. The range hood can be actively used to maintain and improve the indoor environment.

  According to the second aspect of the present invention, when the output level from the first gas sensor exceeds a predetermined discharge threshold, the exhaust means is activated, so that the level of indoor odor, CO, or the like exceeds a certain level. In this case, the odor, CO, etc. can be automatically discharged.

  According to the third aspect of the present invention, when the cumulative number of activations of the exhaust unit reaches a predetermined number of gas exhausts, the exhaust unit is stopped more than necessary by stopping the exhaust unit. Can be prevented.

  According to the fourth aspect of the present invention, the predetermined amount of control is performed based on the output from the first gas sensor while collecting air by activating the exhaust means, so that the indoor gas is Since it can be actively sucked in the vicinity of the gas sensor and the detection efficiency of the first gas sensor can be increased, even a very small amount of gas can be reliably detected.

  According to the invention described in claim 5, the first exhaust means and the second exhaust means are configured separately, the normal exhaust in the room is performed by the first exhaust means, and the exhaust of the gas is the second exhaust. By using the means, gas can be exhausted without using a large exhaust means used for normal exhaust, and the starting power required for exhausting the gas can be reduced. In particular, by collecting air through the second exhaust opening formed at the upper side of the range hood, the gas can be sucked from the position near the ceiling where the gas is likely to stay, and the gas discharge efficiency is further increased. Can do.

  According to the sixth aspect of the present invention, when the output from the first gas sensor during activation of the second exhaust means exceeds a predetermined gas warning threshold, the first exhaust means is activated. Thus, even when the exhaust capacity is increased and the exhaust capacity by the second exhaust means is insufficient, the gas can be discharged quickly.

  According to the seventh aspect of the invention, the range hood is controlled by performing predetermined control based on the output from the first gas sensor and the output from the second gas sensor arranged separately from the range hood. Exhaust means can be controlled based on the gas state at at least two positions, the reference near position and the distant position, and integrated control considering not only the narrow area near the range hood but also the entire indoor area It can be performed.

  According to the eighth aspect of the present invention, when the output from the second gas sensor exceeds a predetermined distant gas warning threshold, the discharge means is activated, and the first gas sensor outputs the signal within the subsequent gas arrival monitoring time. By performing the predetermined control based on whether or not the output exceeds a predetermined neighborhood gas warning threshold, various controls can be performed based on the difference between the gas detection timing in the distance and the gas detection timing in the vicinity. For example, when this difference is large, it is possible to perform integrated control in consideration of the entire indoor region, such as determining that the fluidity of the indoor gas is poor and outputting an alarm.

  According to the ninth aspect of the present invention, the control means controls the alarm output means to perform the alarm output, so that if the generation state of odor, CO, or the like is abnormal, this is detected by the user of the range hood. Etc. can be notified.

  According to the invention of claim 10, by displaying the gas level detected by the first gas sensor on the gas level display means, the user can easily grasp the gas level visually. it can.

  According to the invention described in claim 11, by installing the odor sensor as the gas sensor, the odor level in the room can be controlled such that the odor can be automatically exhausted through the exhaust means when there is odor. , Can enhance the indoor environment.

  According to the invention of claim 12, since either one or both of the exhaust means and the circulation means are selected and operated based on the output from the first gas sensor, the air conditioning efficiency is not lowered. Odor and gas such as CO can be reliably processed.

  According to the thirteenth aspect of the present invention, after the gas is exhausted preferentially by the exhaust means, and the concentration of the odorous substance is sufficiently reduced, the exhaust means is not operated more than necessary, and the remaining odor remains. The material is processed by removal means. Thereby, while being able to process an odor substance reliably, the fall of air-conditioning efficiency can be suppressed to the minimum.

  According to the fourteenth aspect of the present invention, removal of odorous substances by the removing means is preferentially executed, and when the removal by the removing means is insufficient, the exhaust means is operated in an auxiliary manner. As a result, the odorous substance can be removed using the removing means, the operation of the exhausting means can be kept to the minimum necessary, and the deterioration of the air conditioning efficiency can be suppressed.

  According to the fifteenth aspect of the present invention, since the exhaust of the gas by the exhaust means and the removal of the odorous substance by the removal means are selectively used according to the concentration of the odorous substance, reliable removal of the odorous substance and air conditioning efficiency It is possible to maintain an appropriate balance between the reduction of energy loss caused by the decrease of the above.

According to the invention described in claim 16, since the non-odorous substances that cannot be removed by the removing means are forcibly exhausted by the exhausting means, CO, CO ₂ , city gas, etc. having a certain concentration or more are exhausted. When it is detected by the second gas sensor, it can be surely exhausted to ensure safety.

According to the invention described in claim 17, when the output level from the second gas sensor exceeds a predetermined value, so to alarm output by the alarm output means, a certain concentration or more of CO, CO _2, City It is possible to alert the user that gas or the like has been detected.

  According to the eighteenth aspect of the present invention, since the range hood body and the removing means are integrally formed with each other, the range hood system can be made compact.

  Embodiments of a range hood system according to the present invention will be described below in detail with reference to the accompanying drawings. [I] First, the basic concept common to each embodiment was explained, then [II] the specific contents of each embodiment were explained, and [III] Finally, modifications to each embodiment were explained. To do. However, the present invention is not limited to each embodiment.

[I] Basic concept common to the embodiments First, the basic concept common to the embodiments will be described. The range hood system according to each embodiment is installed above the stove in the kitchen, and is used mainly to exhaust odor, oil smoke, combustion gas, water vapor, etc. generated during cooking to the outside of the kitchen. It is.

  This range hood system includes a range hood having an exhaust means. Specific types and forms of the range hood are arbitrary, and include those that are attached in contact with the wall and those that are attached by being suspended from the ceiling. Further, the range hood can be installed arbitrarily, and can be installed, for example, in a general residential kitchen, a restaurant kitchen, or the like.

  The basic feature of the range hood according to each embodiment is that it roughly includes a gas sensor and a control unit that controls at least an exhaust unit based on an output from the gas sensor. And various gas can be automatically discharged by starting exhaust means automatically according to the level of various gas detected by the gas sensor. In addition, if necessary, a plurality of exhaust means and exhaust openings are provided, and some of these may be suitable for oil smoke, etc., and the other may be particularly suitable for gas exhaust. The gas exhaust efficiency can be further improved. Further, the gas detection efficiency can be improved by actively collecting the gas by controlling the exhaust means by the control means before the detection by the gas sensor.

  Here, in each embodiment, “gas” is a concept including so-called odor (odor), CO, and smoke. Similarly, in each embodiment, the “gas sensor” is a concept including an odor sensor (odor sensor), a CO sensor, a gas leak sensor, and a smoke sensor. Among these, as the odor sensor, for example, an alcohol sensor, a smoke sensor (hydrogen sensor), or an oil sensor can be used. In each of the following embodiments, a plurality of sensors for detecting these different objects may be used, or only one sensor for detecting any desired object may be used. In addition, since the specific principle of each sensor is well-known, the description is abbreviate | omitted.

[II] Specific Contents of Each Embodiment Next, specific contents of each embodiment according to the present invention will be described.

[Embodiment 1]
First, the first embodiment will be described. This form is a basic form in which the exhaust means is activated based on the output from the first gas sensor.

(Configuration of range hood system)
First, the configuration of the range hood system will be described. 1 is a perspective view showing an appearance of a range hood system according to Embodiment 1, FIG. 2 is a view showing the range hood system of FIG. 1, wherein (a) is a front view, and (b) is a side view. . As shown in each of these figures, the range hood system includes a range hood 1.

(Configuration of range hood 1)
This range hood 1 is installed in the vicinity of the ceiling above the stove 100 of the kitchen, and the oil smoke, combustion gas, water vapor, or various gases generated during cooking using the fire of the stove 100 are sent to the outside of the kitchen. It is a local ventilation means to exhaust. FIG. 3 is a block diagram functionally conceptually showing the electrical configuration of the range hood 1. The range hood 1 includes a range hood main body 2, a main fan 3, a sub fan 4, a gas sensor 5, a main fan start switch 6, a display unit 7, an alarm output unit 8, a storage unit 9, and a control unit 10. These parts are electrically connected.

(Configuration of range hood 1-range hood body 2)
Among these, the range hood main body 2 is a partition means for partitioning an exhaust path from the kitchen to the outside of the kitchen, and is configured to be hollow from a thin metal plate or the like. As shown in FIGS. 1 and 2, the range hood main body 2 has a first exhaust opening 2a formed by opening substantially the entire bottom surface thereof. Thus, the oil smoke rising from the stove 100 can be sucked. The range hood body 2 has a second exhaust opening 2b. The second exhaust opening 2b is configured as a plurality of horizontally long slits, and is formed at a position where gas staying mainly in the vicinity of the ceiling can be easily collected, for example, at a position above the front of the range hood body 2. Has been. However, when the gas can be sucked through the first exhaust opening 2a, the second exhaust opening 2b is omitted, and any intake air by the main fan 3 or the sub fan 4 is also the first exhaust. You may make it carry out only through the opening part 2a.

  Moreover, the partition plate 2c is arrange | positioned inside the range hood main body 2, The interior space of the range hood main body 2 is divided into the main duct 2d and the subduct 2e by this partition plate 2c. The main duct 2d is an air passage that extends from the first exhaust opening 2a to the outside through the main fan 3, and is an exhaust passage that mainly discharges gas other than gas. The sub duct 2e is a ventilation path extending from the second exhaust opening 2b through the sub fan 4 to the main duct 2d, and is a discharge path mainly for gas. In this way, by providing a gas exclusive discharge path, the volume of the gas exhaust ventilation path can be reduced compared with the case where both oil smoke and gas are discharged only through the main duct 2d, and the gas is discharged. Therefore, the load on the sub fan 4 can be reduced. However, when such an advantage can be ignored, the sub duct 2e may be omitted, and any intake by the main fan 3 or the sub fan 4 may be performed only through the main duct 2d.

(Configuration of range hood 1-main fan 3)
The main fan 3 mainly exhausts gas other than gas through the first exhaust opening 2a, and corresponds to the exhaust means and the first exhaust means in the claims. The main fan 3 is disposed in the vicinity of the upper end in the range hood main body 2.

(Configuration of range hood 1-sub fan 4)
The sub fan 4 mainly exhausts gas through the second exhaust opening 2b, and corresponds to the exhaust means and the second exhaust means in the claims. The sub fan 4 is disposed at a position corresponding to the second exhaust opening 2 b on the front inner side of the range hood body 2. In particular, the sub-fan 4 is intended only to exhaust gas, and is not intended to exhaust other gases (such as oily smoke) that are larger than the gas, so that the amount of exhaust compared to the main fan 3 is reduced. It can be configured by using a small fan with a small size. In this way, by using the sub fan 4 smaller than the main fan 3 to exhaust gas, it is possible to reduce the starting power required for gas exhaust. For example, a propeller fan, a sirocco fan, or a turbo fan can be used as the main fan 3 and the sub fan 4.

(Configuration of range hood 1-gas sensor 5)
The gas sensor 5 is gas detection means for detecting the presence of gas in the room and corresponds to the first gas sensor in the claims. The gas sensor 5 is disposed at a position where the gas can be easily detected, for example, at a position near the second exhaust opening 2b on the front outside of the range hood body 2.

(Configuration of range hood 1-main fan start switch 6)
The main fan start switch 6 is an operation means for starting the main fan 3 manually. The main fan activation switch 6 is configured as a push button, for example, and is disposed on the side of the display unit 7 below the outer surface of the range hood body 2.

(Configuration of range hood 1-display unit 7)
The display unit 7 displays the gas level detected by the gas sensor 5 and / or the activation state of the sub fan 4, and corresponds to the display means in the claims. The display unit 7 is disposed at a position visible to the user of the range hood 1, for example, below the outer surface of the range hood main body 2. The specific configuration of the display unit 7 is arbitrary, but here, a liquid crystal panel 7 a that displays the state of each unit of the range hood system, and a plurality of LEDs (Light Emitting) that are lit up in a number corresponding to the detection level of the gas sensor 5. (Diode) are arranged in series, and a gas level display unit 7b configured to be arranged in series and a sub fan activation lamp 7c that is turned on when the sub fan 4 is activated are provided.

(Configuration of range hood 1-alarm output unit 8)
The alarm output unit 8 is for outputting an alarm related to gas detection, and is controlled by the control unit 10 described later. The installation location of the alarm output unit 8 is arbitrary, but it is desirable that the alarm is easily recognized by the user or the like. For example, the alarm output unit 8 is installed on the outer surface of the range hood 1. Moreover, the specific aspect of the alarm output by the alarm output part 8 is arbitrary, For example, you may make it output by an audio | voice and a screen display.

(Configuration of range hood 1-storage unit 9)
In FIG. 3, the storage unit 9 is a storage unit that stores data and programs necessary for the control of the control unit 10, and particularly stores various threshold values and monitoring time described later.

(Configuration of range hood 1-control unit 10)
The control unit 10 is a control unit that controls each unit of the range hood system. The control unit 10 includes a timer 10a, a detection control unit 10b, a fan control unit 10c, a display control unit 10d, and an alarm control unit 10e in terms of functional concept. The timer 10 a is a time measuring unit that measures a time required for the control of the control unit 10. The detection control unit 10b is gas detection control means that determines the presence or absence of gas based on the detection output from the gas sensor 5 and performs control based on this determination. The fan control unit 10c is a fan control unit that controls the activation of the main fan 3 and the sub fan 4 according to the operation of the operation switch, the output of the gas sensor 5, and the like. The display control unit 10 d is a display control unit that controls each unit of the display unit 7. The alarm control unit 10 e is an alarm control unit that controls the alarm output unit 8. Although the specific configuration of the control unit 10 is arbitrary, for example, a control program such as an OS (Operating System), a program that defines various processing procedures, an internal memory for storing necessary data, and these A CPU (Central Processing Unit) for executing the program is provided.

(Control processing of range hood system)
Next, the control process of the range hood system will be described. FIG. 4 is a flowchart of the control process of the range hood system. First, the control unit 10 monitors whether or not the main fan start switch 6 is turned on (step SA-1). When the main fan start switch 6 is turned on (step SA-1, Yes), The main fan 3 is activated via the fan control unit 10c (step SA-2).

  Next, the control unit 10 monitors the output signal from the gas sensor 5 via the detection control unit 10b (step SA-3), and monitors whether the main fan activation switch 6 is turned off (step SA-4). ). As the output signal from the gas sensor 5 is monitored, the control unit 10 controls the gas level display unit 7b via the display control unit 10d to turn on the number of LEDs corresponding to the output signal from the gas sensor 5. Therefore, the user can grasp | ascertain the grade of gas by visually observing this gas level display part 7b.

  Then, the control unit 10 keeps the level of the output signal from the gas sensor 5 in a predetermined threshold value stored in advance in the storage unit 9 until the main fan start switch 6 is turned off (No in step SA-4). Hereinafter, in comparison with “discharge threshold” (step SA-5), if the level of the output signal exceeds the discharge threshold (step SA-5, Yes), the sub fan 4 is connected via the fan control unit 10c. At the same time, the sub fan activation lamp 7c is turned on via the display controller 10d (step SA-6). The discharge threshold value may be determined based not only on whether the output level of the sensor exceeds the threshold value, but on whether the rate of change exceeds the threshold value by looking at the rate of increase or decrease rate over a predetermined time. As a result, the gas staying in the vicinity of the ceiling is sucked into the sub duct 2e through the second exhaust opening 2b and discharged to the outside through the main duct 2d. Thereafter, the control unit 10 continues to start the sub fan 4 until the level of the output signal from the gas sensor 5 falls below the discharge threshold, and when the level falls below the discharge threshold (No at Step SA-5). Then, the sub fan 4 is stopped via the fan control unit 10c, and the sub fan activation lamp 7c is turned off (step SA-7).

  Thereafter, when the main fan start switch 6 is turned off (step SA-4, Yes), the control unit 10 stops the main fan 3 via the fan control unit 10c (step SA-8). If the main fan start switch 6 is turned off before it is determined in step SA-5 that the level of the output signal exceeds the discharge threshold value, the control unit 10 determines that the fan is the same as in step SA-7. The sub fan 4 is stopped via the controller 10c, and the sub fan activation lamp 7c is turned off (step not shown).

  Even after the main fan 3 is thus stopped, the control unit 10 monitors the output from the gas sensor 5 and exhausts the gas as necessary. That is, the control unit 10 compares the level of the output signal from the gas sensor 5 with the discharge threshold (step SA-9), and if the level of the output signal exceeds the discharge threshold (step SA-9, Yes). Then, the sub fan 4 is activated via the fan control unit 10c and the sub fan activation lamp 7c is lit via the display control unit 10d (step SA-10).

  At this time, the control unit 10 activates the sub fan 4 for a predetermined time (hereinafter referred to as “gas discharge time”) stored in advance in the storage unit 9 while referring to the timer 10a. Then, every time this gas discharge time ends, the process proceeds to step SA-9 to monitor the level of the output signal from the gas sensor 5 again, and thereafter, until the level of the output signal from the gas sensor 5 falls below the discharge threshold, The starting of the sub fan 4 is repeated every time the gas is discharged. When the level of the output signal from the gas sensor 5 falls below the discharge threshold (No at Step SA-9), the sub fan 4 is stopped via the fan control unit 10c and the sub fan start lamp 7c is turned off. (Step SA-11). This ends the control process. As described above, even when the main fan 3 is in a stopped state, when the gas exceeds a certain level, only the sub fan 4 is activated and the gas is exhausted, so that the gas can be discharged with low power. it can. In this case, since the gas is discharged through the sub duct 2e separated from the main duct 2d, even when the main fan 3 is stopped, the gas is discharged into the main duct 2d or the first exhaust opening. Backflow from the portion 2a into the room is prevented.

  In step SA-10, the main fan 3 may be operated continuously for a predetermined time simultaneously with the sub fan 4. Further, in this case, in order to suppress the rotation sound of the main fan 3, the operation may be performed at a lower speed than during normal operation.

  Although not shown in FIG. 4, the control unit 10 generates an alarm sound from the alarm output unit 8 via the alarm control unit 10 e according to the type of gas detected by the gas sensor 5 and the level of detection output. Output. For example, when a CO sensor or a smoke sensor is used as the gas sensor 5, an alarm is output in step SA-6 or step SA-10 to alert the user. In addition, even if the gas level falls below the discharge threshold value, the sub-fans in steps SA-7 and SA-11 can be discharged more completely if they are stopped after operating for a predetermined time. it can.

(Effect of Embodiment 1)
As described above, according to the first embodiment, the gas staying in the vicinity of the ceiling is sucked into the sub duct 2e through the second exhaust opening 2b and discharged to the outside through the main duct 2d. In particular, even when the main fan 3 is stopped, when the gas exceeds a certain level, only the sub fan 4 is activated and the gas is exhausted, so that the gas can be discharged with low power.

  Further, in this case, by providing a gas exclusive discharge path, the volume of the gas exhaust ventilation path can be reduced as compared with the case where both the oil smoke and the gas are discharged only through the main duct 2d. It is possible to reduce the load on the sub fan 4 for discharging the air.

  Further, since the gas is discharged through the sub duct 2e separated from the main duct 2d, even when the main fan 3 is stopped, the gas enters the room from the main duct 2d or the first exhaust opening 2a. Backflow is prevented.

  Furthermore, the user can grasp | ascertain the grade of gas by visually inspecting the gas level display part 7b.

[Embodiment 2]
Next, a second embodiment of the present invention will be described. In this form, when the output of the first gas sensor is equal to or greater than a predetermined threshold, the second exhaust means exhausts a predetermined number of times. The configuration of the range hood system according to the second embodiment is substantially the same as the configuration of the first embodiment unless otherwise specified, and the configuration substantially the same as the configuration of the first embodiment is the same as that of the first embodiment. The same reference numerals and / or names as used in 1 are attached as necessary, and the description thereof is omitted.

(Configuration of range hood system)
First, the configuration of the range hood system will be described. FIG. 5 is a block diagram functionally conceptually showing the electrical configuration of the range hood system according to the second embodiment. The range hood 20 according to the second embodiment is provided with a control unit 21 instead of the control unit 10 according to the first embodiment. The control unit 21 is functionally conceptually similar to the first embodiment. In addition to the configuration, a counter 21a is further provided. Here, the counter 21 a is a counting unit that measures the number of times required for the control of the control unit 21.

(Control processing of range hood system)
Next, the control process of the range hood system will be described. FIG. 6 is a flowchart of the control process of the range hood system. First, the control unit 21 monitors whether or not the main fan start switch 6 is turned on (step SB-1). If the main fan start switch 6 is turned on (step SB-1, Yes), The main fan 3 is activated via the fan control unit 10c (step SB-2). Next, the control unit 21 continues to start the main fan 3 until the main fan start switch 6 is turned off (step SB-3, No), and starts monitoring the output signal from the gas sensor 5 (step SB). -4). At this time, the control unit 21 controls the gas level display unit 7b via the display control unit 10d to turn on the number of LEDs corresponding to the output signal from the gas sensor 5. Therefore, the user can grasp | ascertain the grade of gas by visually observing this gas level display part 7b.

  Then, the control unit 21 compares the level of the output signal from the gas sensor 5 with a predetermined discharge threshold value stored in advance in the storage unit 9, and when the level of the output signal exceeds the discharge threshold value (step SB- 4, Yes), the sub fan 4 is activated via the fan control unit 10c, and the sub fan activation lamp 7c is turned on via the display control unit 10d (step SB-5). As a result, the gas staying in the vicinity of the ceiling is sucked into the sub duct 2e through the second exhaust opening 2b and discharged to the outside through the main duct 2d.

  In step SB-5, the control unit 21 activates the sub fan 4 for the gas discharge time stored in advance in the storage unit 9 while referring to the timer 10a. The control unit 21 counts up the counter 21a every time the sub fan 4 is started in this way, and whether the integrated value in the counter 21a has reached a predetermined number of times (hereinafter referred to as “the number of gas discharge completions”). It is determined whether or not (step SB-6), and if the value of the counter 21a has not reached the number of gas completion discharge (step SB-6, No), the process proceeds to step SB-3. Thereafter, until the main fan start switch 6 is turned off (step SB-3, Yes), until the level of the output signal from the gas sensor 5 falls below the discharge threshold (step SB-4, No), or the value of the counter 21a. Until the number of gas discharge completion is reached (step SB-6, Yes), the sub fan 4 is continuously activated.

  When any one of these conditions is satisfied, the control unit 21 stops the sub fan 4 and turns off the sub fan activation lamp 7c via the fan control unit 10c (step SB-7). Moreover, the control part 21 stops the main fan 3 via the fan control part 10c (step SB-8). This ends the control process.

  Although not shown in FIG. 6, when the value of the counter 21a reaches the number of gas discharges, the control unit 21 outputs an alarm sound from the alarm output unit 8 via the alarm control unit 10e. That is, if the output level of the gas sensor 5 does not fall below the discharge threshold even if the sub-fan 4 is activated as many times as the number of gas discharges completed, some abnormality (if a CO sensor or smoke sensor is used as the gas sensor 5, A gas leak or fire may have occurred, so an alarm is output to alert the user.

(Effect of Embodiment 2)
As described above, according to the second embodiment, when the output of the gas sensor 5 is equal to or greater than the predetermined threshold value, the second exhaust unit is exhausted a predetermined number of times, so that the second exhaust unit is activated more than necessary. Can be prevented.

[Embodiment 3]
Next, a third embodiment of the present invention will be described. In this form, air is collected by activating the second exhaust means, and predetermined control is performed based on the output from the first gas sensor during the air collection. The configuration of the range hood system according to the third embodiment is substantially the same as the configuration of the first embodiment unless otherwise specified. The configuration substantially the same as the configuration of the first embodiment is the same as that of the first embodiment. The same reference numerals and / or names as used in 1 are attached as necessary, and the description thereof is omitted.

(Configuration of range hood system)
First, the configuration of the range hood system will be described. FIG. 7 is a block diagram functionally conceptually showing the electrical configuration of the range hood system according to the third embodiment. In the range hood 30 according to the third embodiment, a control unit 31 is provided instead of the control unit 10 of the first embodiment.

(Control processing of range hood system)
Next, the control process of the range hood system will be described. FIG. 8 is a flowchart of control of the range hood system. This control process is performed on the assumption that the main fan 3 and the sub fan 4 are stopped. Specifically, the control unit 31 monitors the arrival of a predetermined interval (hereinafter referred to as “gas monitoring interval”) by referring to the timer 10a (step SC-1), and when the gas monitoring interval has arrived. (Step SC-1, Yes), with reference to the timer 10a, the sub fan 4 is started for a predetermined time (hereinafter referred to as “gas monitoring time”) and the sub fan start lamp 7c is turned on (Step SC-2, SC-3). As a result, the indoor gas can be actively sucked in the vicinity of the gas sensor 5 and the detection efficiency of the gas sensor 5 can be increased, so that even a very small amount of gas can be reliably detected.

  Then, the control unit 31 monitors the output signal from the gas sensor 5 during this gas monitoring time (step SC-4), and the level of the output signal from the gas sensor 5 is a predetermined first threshold (hereinafter referred to as “gas warning”). If the threshold value is not exceeded (step SC-4, No), after the gas monitoring time has elapsed, the sub fan 4 is stopped and the sub fan activation lamp 7c is turned off (step SC-5).

  On the other hand, when the level of the output signal from the gas sensor 5 exceeds the gas warning threshold (step SC-4, Yes), the control unit 31 sets the gas monitoring time to a predetermined time (hereinafter referred to as “gas monitoring extended time”). ) And the sub fan 4 continues to be started (steps SC-6 and SC-7). As a result, when there is a possibility of abnormality, gas monitoring can be extended, and the certainty of abnormality detection can be improved.

  Then, the control unit 31 monitors the output signal from the gas sensor 5 during the extended gas monitoring time (step SC-8), and the level of the output signal from the gas sensor 5 is a predetermined second threshold (hereinafter, “ If the extended gas monitoring time has passed without exceeding (discharge threshold> gas warning threshold) (step SC-7, Yes), the process returns to step SC-4, and again, The level of the output signal from the gas sensor 5 is compared with the gas warning threshold. Thereafter, the start of the sub fan 4 and the monitoring of the output signal from the gas sensor 5 are continued until the level of the output signal from the gas sensor 5 falls below the gas warning threshold. Then, when the level of the output signal from the gas sensor 5 is below the gas warning threshold (Step SC-4, No), and after the gas monitoring time has elapsed (Step SC-3, Yes), the sub fan 4 is turned on. While stopping, the sub fan starting lamp 7c is extinguished (step SC-5).

  On the other hand, when the level of the output signal from the gas sensor 5 exceeds the discharge threshold value in step SC-8 (step SC-8, Yes), the control unit 31 activates the main fan 3 via the fan control unit 10c. At the same time, an alarm sound is output from the alarm output unit 8 via the alarm control unit 10e (step SC-9). As a result, when the gas level is high, the main fan 3 is automatically activated in addition to the sub fan 4 to increase the exhaust capacity to promote early gas discharge, and this abnormality is used as an alarm. The person can be notified.

  Thereafter, the control unit 31 continues the activation of the sub fan 4 and the main fan 3 and the alarm output until the level of the output signal from the gas sensor 5 falls below the discharge threshold (step SC-10), and falls below the discharge threshold. (Step SC-10, No), after stopping the main fan 3 and alarm output (Step SC-11), returning to Step SC-4, the level of the output signal from the gas sensor 5 and the gas warning threshold again. Start comparison with.

  In Step SC-9, the main fan 3 is activated first, and the alarm output unit 8 may output an alarm when the output level of the gas sensor 5 does not become lower than the predetermined threshold even after a predetermined time has elapsed. .

(Effect of Embodiment 3)
As described above, according to the third embodiment, the gas staying in the vicinity of the ceiling is sucked into the sub duct 2e through the second exhaust opening 2b and discharged to the outside through the main duct 2d. In particular, even when the main fan 3 is not activated, the sub-fan 4 is activated at a predetermined interval, whereby indoor gas can be actively sucked in the vicinity of the gas sensor 5, and the detection efficiency of the gas sensor 5 can be improved. Since it can raise, even a trace amount gas can be detected reliably. Moreover, when there is a possibility of abnormality, gas monitoring can be extended, and the certainty of abnormality detection can be improved. Furthermore, when the gas level is high, the main fan 3 can be automatically activated in addition to the sub fan 4 to increase the exhaust capacity, thereby prompting early gas discharge.

[Embodiment 4]
Next, a fourth embodiment of the present invention will be described. In this mode, when gas is detected by the second gas sensor, the second exhaust means is activated to collect air, and the time for gas detection by the second gas sensor and the first time after that are detected. It is a form which performs an alarm etc. based on the difference with the time of gas detection by this gas sensor. The configuration of the range hood system according to the fourth embodiment is substantially the same as the configuration of the first embodiment unless otherwise specified, and the configuration substantially the same as the configuration of the first embodiment is the same as that of the first embodiment. The same reference numerals and / or names as used in 1 are attached as necessary, and the description thereof is omitted.

(Configuration of range hood system)
First, the configuration of the range hood system will be described. FIG. 9 is a side view showing the overall configuration of a building in which the range hood system according to Embodiment 4 is installed, and FIG. 10 is a block diagram functionally conceptually showing the electrical configuration of the range hood. As shown in FIG. 9, the range hood system includes a range hood 40 and a gas sensor 41. The range hood 40 is provided with a control unit 42 instead of the control unit 10 of the first embodiment.

  The gas sensor 41 is a gas detection means for detecting the presence of gas in the room, and corresponds to the second gas sensor in the claims. The gas sensor 41 detects the same type of gas as the gas sensor 5. For example, when the gas sensor 5 is an odor sensor, the gas sensor 41 is also configured as an odor sensor. The installation position of the gas sensor 41 is a position where the gas can be easily detected, and is a far position of the range hood. The distant position of the range hood is a position where the gas detected by the gas sensor 41 is not immediately sucked by the range hood 40. For example, the distant position of the range hood is a position near the ceiling of the living room connected to the kitchen in which the range hood 40 is installed. Installed. More preferably, the gas sensor 41 is on the ventilation path from the gas inlet (supply port) 43 to the range hood in the building, and the gas sensor 41 detects the gas in the room instead of the gas entering from the inlet 43. It is preferable to dispose at a position away from the inlet 43. The gas sensor 41 is electrically connected to the control unit 42 as shown in FIG.

(Control processing of range hood system)
Next, the control process of the range hood system will be described. FIG. 11 is a flowchart of the control process of the range hood system. This control process is performed on the assumption that the main fan 3 and the sub fan 4 are stopped. Specifically, the control unit 42 monitors the output signal from the gas sensor 41 disposed far away (step SD-1), and the level of the output signal from the gas sensor 41 is a predetermined first threshold (hereinafter, “ When the distance gas warning threshold is exceeded (step SD-1, Yes), the timer 10a starts time measurement (step SD-2). Further, the control unit 42 activates the sub fan 4 (step SD-3) and lights the sub fan activation lamp 7c.

  Thereafter, the control unit 42 sets the level of the output signal from the nearby gas sensor 5 within a predetermined time (hereinafter referred to as “gas arrival monitoring time”) after the timer 10a starts measuring in step SD-2. It is monitored whether or not a threshold value of 2 (hereinafter, “neighboring gas warning threshold value”) is exceeded (steps SD-4 and SD-8). When the neighborhood gas warning threshold is exceeded within the gas arrival monitoring time (step SD-4, Yes), the indoor gas smoothly flows, and the gas detected by the gas sensor 41 passes through the gas sensor 5 and the range hood. Therefore, the sub-fan 4 is output until the level of the output signal from the gas sensor 41 falls below the distant gas warning threshold and the level of the output signal from the gas sensor 5 falls below the nearby gas warning threshold. When these conditions are satisfied (step SD-5, Yes), the sub fan 4 is stopped, the sub fan start lamp 7c is turned off (step SD-6), and the timer 10a is turned off. Reset (step SD-7). That is, when the gas fluidity is high, only the sub fan 4 is operated to exhaust the gas to a predetermined level or less.

  On the other hand, if the vicinity gas warning threshold is not exceeded within the gas arrival monitoring time (step SD-8, Yes), the control unit 42 does not smoothly flow the room gas, and the gas detected by the gas sensor 41 is detected. Is not normally discharged from the range hood via the gas sensor 5, so that the main fan 3 is activated via the fan control unit 10c and an alarm sound is output from the alarm output unit 8 via the alarm control unit 10e. Output (step SD-9). As a result, the main fan 3 is automatically activated in addition to the sub fan 4 to increase the exhaust capacity, thereby improving the fluidity of the gas in the room and notifying the user of this abnormality by an alarm. Thereafter, the control unit 42 continues the operation of the sub fan 4 until the level of the output signal from the gas sensor 41 falls below the far gas warning threshold and the level of the output signal from the gas sensor 5 falls below the nearby gas warning threshold. When these conditions are satisfied (step SD-10, Yes), the main fan 3 and the sub fan 4 are stopped, the sub fan start lamp 7c is turned off, and the alarm output is stopped (step SD-11). ), The timer 10a is reset (step SD-7). That is, when the gas fluidity is poor, the main fan 3 is operated in addition to the sub fan 4 to exhaust the gas to a predetermined level or less. This ends the control process.

(Effect of Embodiment 4)
As described above, according to the fourth embodiment, the main fan 3 and the sub-fan 4 can be controlled based on the gas state at at least two positions of the near position and the distant position with reference to the range hood. It is possible to perform integrated control in consideration of not only a narrow area in the vicinity of but also the entire indoor area. Further, the fluidity of the gas in the room can be determined based on the difference in detection time between the gas sensors 5 and 41. If the fluidity is poor, the main fan 3 is automatically activated in addition to the sub fan 4 to exhaust the gas. The capacity can be increased to improve the fluidity of the gas in the room, and this abnormality can be notified to the user by an alarm.

[Embodiment 5]
Next, a fifth embodiment will be described. In this form, the sub fan 4, the gas sensor 5, the display unit 7, and the control unit 10 are provided separately from the range hood main body 2.

  The configuration of the fifth embodiment is substantially the same as the configuration of the first embodiment except where otherwise specified. The configuration substantially the same as the configuration of the first embodiment is the same as that used in the first embodiment. The same reference numerals and / or names are attached as necessary, and the description thereof is omitted.

(Configuration of range hood system)
First, the configuration of the range hood system will be described. FIG. 12 is a block diagram functionally conceptually showing the electrical configuration of the range hood system according to the fifth embodiment. As shown in FIG. 12, the range hood system includes a range hood 50, a control panel 51, a gas sensor 5, and a ventilation fan 52.

(Configuration of range hood system-range hood 50, control panel 51, gas sensor 5)
In the fifth embodiment, only the main fan 3 is provided in the range hood main body 2 of the range hood 50. On the other hand, the main fan start switch 6, the display unit 7, the alarm output unit 8, the storage unit 9, and the control unit 10 of the range hood 50 are arranged on the control panel 51 separately from the range hood body 2. The control panel 51 is for controlling the range hood 50 and the ventilation fan 52, and is electrically connected to the main fan 3, the gas sensor 5, and the ventilation fan 52. The arrangement position of the control panel 51 is arbitrary, and is provided, for example, on a place where the user can easily operate, for example, a wall surface in the kitchen. Further, the gas sensor 5 is also disposed separately from the range hood main body 2 in a place suitable for gas detection in the room, for example, near the ceiling of the kitchen.

(Configuration of range hood system-Ventilation fan 52)
The ventilation fan 52 is provided with the sub fan 4 provided in the range hood main body 2 in Embodiments 1 to 3 described above as a separate body from the range hood main body 2. Although the arrangement position of the ventilation fan 52 is arbitrary, in order to exhaust gas effectively, it is desirable to arrange the ventilation fan 52 near the ceiling in a room such as a kitchen.

(Effect of Embodiment 5)
As described above, according to the fifth embodiment, since the control panel 51, the gas sensor 5, and the ventilation fan 52 are provided separately from the range hood main body 2, the optimal location is provided in order to maximize each function. Can be arranged.

[Embodiment 6]
Next, a sixth embodiment will be described. This form is a form having a function of removing odor components in addition to an exhaust function using a range hood.

  That is, in Embodiments 1 to 4 described so far, the main fan 3 and the sub-fan 4 are mainly used for exhaust. However, there is a possibility that the odor component cannot always be appropriately removed only by the exhaust function. there were. In other words, it has become popular today to install an open kitchen in a general house, and the odor from this open kitchen tends to flow into the living room as it is. Function is becoming more and more important.

  Conventionally, in order to remove odors generated from garbage, pets, etc., an odor-causing substance using an adsorption method using an adsorbent such as activated carbon or zeolite, or active oxygen generated by irradiating the photocatalyst with ultraviolet rays is used. Deodorizers using various methods such as a photocatalytic method for oxidative decomposition are used. For example, in Japanese Patent Application Laid-Open No. 2003-093840, a photocatalyst using titanium oxide or the like is applied to an inner wall portion that forms an air passage in a deodorizer, and deodorization is prevented by preventing odor residue and accumulation in the deodorizer. An improved deodorizer is disclosed.

  However, when odor is discharged from the room using the above-described range hood, air that has been air-conditioned to an appropriate room temperature by the air conditioner is discharged to the outside, and unair-conditioned outside air is introduced into the room. Therefore, when the difference between the room temperature and the outside air temperature is large, the air conditioning efficiency is reduced.

  Moreover, although the above-mentioned deodorizer is effective for removing odors gradually generated from garbage and pets, it does not have a processing capacity to cope with odors that are temporarily generated in large quantities during cooking. It was. Moreover, since it cannot respond to carbon monoxide (CO) generated by incomplete combustion of a gas stove or city gas that has flowed out due to gas leakage, the applicable range is limited.

  Therefore, in view of the above problems, Embodiment 6 and Embodiment 7 described later provide a range hood system that can reliably treat odors and gases while suppressing a decrease in air conditioning efficiency.

  One of the features of the range hood system according to the sixth embodiment and the seventh embodiment is that, roughly, gas sensor, exhaust means, removal means for removing odor, air between the room and the removal means. There is provided a circulation means for circulating, and a control means for controlling the exhaust means and the circulation means based on the output from the gas sensor. In other words, depending on the type and level of gas detected by the gas sensor, either the exhaust means or the circulation means can be selected and operated or used together, so that the air conditioning efficiency can be reliably reduced without lowering. Odor and gas such as CO can be treated.

(Configuration of range hood system 101)
First, the configuration of the range hood system according to the sixth embodiment will be described. 13 is a perspective view showing the appearance of the range hood system according to the sixth embodiment, FIG. 14 is a view showing the range hood system of FIG. 13, wherein (a) is a front view, (b) is a side view, and FIG. 15 is a block diagram functionally conceptually showing the electrical configuration of the range hood system. In addition, in FIG.14 (b), the deodorizer mentioned later is not illustrated. As shown in these drawings, the range hood system 101 includes a range hood 110, a deodorizer 120, a gas sensor 130, an operation unit 140, a display unit 150, an alarm output unit 160, a storage unit 170, and a control unit 180. Yes.

(Configuration of range hood system 101-range hood 110)
The range hood 110 is installed in the vicinity of the ceiling above the stove 199 of the kitchen, and exhausts oil smoke, combustion gas, water vapor, or various gases generated during cooking using the fire of the stove 199 to the outside of the kitchen. It is a local ventilation means. The range hood 110 includes a range hood main body 111 and an exhaust fan 112.

  The range hood main body 111 is a partitioning means for partitioning an exhaust path from the kitchen to the outside of the kitchen, and is formed in a hollow shape from a thin metal plate or the like. As shown in FIG. 13, an exhaust opening 111a is formed in the range hood main body 111 by opening substantially the entire bottom surface thereof, and oil smoke rising from the stove 199 via the exhaust opening 111a. Can be inhaled. A first duct 111 b is provided inside the range hood main body 111. The first duct 111b is a ventilation path extending from the exhaust opening 111a to the outside via the exhaust fan 112.

  The exhaust fan 112 exhausts various gases in the kitchen through the exhaust opening 111a, and corresponds to the exhaust means in the claims. The exhaust fan 112 is disposed in the vicinity of the upper end inside the range hood main body 111.

(Configuration of range hood system 101-deodorizer 120)
The deodorizer 120 removes odor-causing substances contained in the air in the kitchen, such as oily smoke generated during cooking or the odor generated from garbage or food in the refrigerator, from the air in the kitchen. It is a deodorizing means. The deodorizer 120 is installed near the ceiling, wall surface, or floor surface of a kitchen, and includes a deodorizer body 121 and a circulation fan 122.

  The deodorizer main body 121 performs deodorization of air by circulating the air to be deodorized between the deodorizer main body 121 and the kitchen, and includes a filter 121a and a circulation opening 121b. .

  The filter 121a is disposed inside the deodorizer main body 121 and passes odor-causing substances (for example, formaldehyde, ammonia, sulfur compounds, etc .; hereinafter referred to as “odor substances”) contained in the air through the filter 121a. For removing from the air, and corresponds to the removing means in the claims. As the filter 121a, a known filter for deodorization can be used. For example, an adsorption filter such as activated carbon or zeolite, a photocatalyst filter coated with a photocatalyst such as titanium oxide, or the like can be used.

  The circulation opening 121b is an opening serving as an air flow path between the inside of the kitchen and the inside of the deodorizer main body 121, and an inlet 121c for allowing air to flow into the filter 121a inside the deodorizer main body 121 from the kitchen. And an air outlet 121d for returning the air that has passed through the filter 121a into the kitchen.

  The circulation fan 122 is for circulating air between the inside of the kitchen and the inside of the deodorizer main body 121 through the circulation opening 121b, and corresponds to the circulation means in the claims. The circulation fan 122 is disposed inside the deodorizer main body 121.

(Configuration of range hood system 101-gas sensor 130)
The gas sensor 130 is gas detection means for detecting the presence of gas in the room, and includes a first gas sensor 131 and a second gas sensor 132. The first gas sensor 131 is configured as an odor sensor that detects an odor substance. On the other hand, the second gas sensor 132 is a substance that cannot be removed by the filter 121a of the deodorizer 120, and is a substance (for example, carbon monoxide, carbon dioxide) that should be suppressed to a certain concentration or less from the viewpoint of safety. , City gas, etc. Hereinafter, it is configured as a gas sensor for detecting “non-odorous substances”). The 1st gas sensor 131 and the 2nd gas sensor 132 are positions which can detect gas easily, for example, the front outside of range hood body 111, the front outside of deodorizer body 121, or range hood 110 and deodorizer 120. As a separate body, it is arranged near the ceiling in the room. Note that the first gas sensor 131 and the second gas sensor 132 may be provided integrally with each other, or may be provided at different locations. In addition, since the specific principle of each sensor is well-known, the description is abbreviate | omitted.

(Configuration of range hood system 101-operation unit 140)
The operation unit 140 is an operation unit that receives input operations for instructing the range hood system 101 to perform various operations, and includes an exhaust fan start switch 141, a circulation fan start switch 142, and a mode selection switch 143. Yes. The exhaust fan start switch 141 and the circulation fan start switch 142 are operation means for starting the exhaust fan 112 and the circulation fan 122 manually, respectively. The mode selection switch 143 is operation means for selecting a mode for controlling the exhaust fan 112 and the circulation fan 122 by the control unit 180. In addition, the specific structure and arrangement | positioning position of the operation part 140 are arbitrary, for example, it comprises as a push button and is arrange | positioned to the side of the display part 150 in the lower outer surface of the range hood main body 111.

(Configuration of range hood system 101-display unit 150)
The display unit 150 is a display unit that displays the gas level detected by the first gas sensor 131 or the second gas sensor 132 and / or the control state of the exhaust fan 112 and the circulation fan 122 by the control unit 180. The display unit 150 is provided with the range hood system 101 as a position visible to the user of the range hood system 101, for example, below the outer surface of the range hood main body 111 or as a separate body from the range hood 110. It is arranged on the wall of the room. The specific configuration of the display unit 150 is arbitrary, but here, the liquid crystal panel 151 that displays the state of each unit of the range hood system 101, and the detection levels of the first gas sensor 131 and the second gas sensor 132 are set. A gas level display unit 152 and an odor level display unit 153 configured by arranging a plurality of LEDs (Light Emitting Diodes) that are turned on in accordance with the number in series are provided.

(Configuration of range hood system 101-alarm output unit 160)
The alarm output unit 160 is for outputting an alarm relating to gas detection, and corresponds to the alarm output means in the claims. The alarm output unit 160 is controlled by the control unit 180. The installation location of the alarm output unit 160 is arbitrary, but is preferably a location where the user or the like can easily recognize the alarm. For example, the alarm output unit 160 is installed on the outer surface of the range hood main body 111. Moreover, the specific aspect of the alarm output by the alarm output part 160 is arbitrary, For example, you may make it output by an audio | voice and a screen display.

(Configuration of range hood system 101-storage unit 170)
The storage unit 170 is a storage unit that stores data and programs necessary for the control of the control unit 180, and particularly stores various threshold values and standby time described later.

(Configuration of range hood system 101-control unit 180)
The control unit 180 controls each unit of the range hood system 101 and corresponds to the control means in the claims. The control unit 180 includes a timer 181, a detection control unit 182, a fan control unit 183, a display control unit 184, and an alarm control unit 185 in terms of functional concept. The timer 181 is a time measuring unit that measures the time required for the control of the control unit 180. The detection control unit 182 is a gas detection control unit that determines the presence or absence of odor or other gas based on the detection output from the gas sensor 130 and performs control based on this determination. The fan control unit 183 is a fan control unit that controls activation of the exhaust fan 112 and the circulation fan 122 in accordance with an operation input via the operation unit 140, an output of the gas sensor 130, and the like. The display control unit 184 is a display control unit that controls each unit of the display unit 150. The alarm control unit 185 is an alarm control unit that controls the alarm output unit 160. The specific configuration of the control unit 180 is arbitrary. For example, the control unit 180 stores a control program such as an OS, a program that defines various processing procedures, an embedded program that defines various processing procedures, and necessary data. It comprises an internal memory and a CPU that executes these programs.

(Control processing of range hood system 101)
Next, control processing of the range hood system 101 will be described. FIG. 16 is a flowchart of the control process of the range hood system 101. First, the control unit 180 monitors the output signal from the second gas sensor 132 via the detection control unit 182 and controls the gas level display unit 152 via the display control unit 184 so that the second gas sensor 132 The LED is turned on in response to the output signal (step SE-1). Accordingly, the user can grasp the degree of gas by viewing the gas level display unit 152.

  Subsequently, the control unit 180 compares the level of the output signal from the second gas sensor 132 with the discharge threshold value stored in advance in the storage unit 170 (step SE-2), and the level of the output signal is equal to or higher than the discharge threshold value. If it is (step SE-2, Yes), forced exhaust processing is executed (step SE-3). Here, the discharge threshold value is stored in the storage unit 170 as the concentration of the non-odorous substance that has reached a level at which the exhaust fan 112 needs to be discharged from the kitchen, and is a seventh threshold value in the claims. Corresponding to A specific value of the discharge threshold can be arbitrarily determined based on experimental results and the like. The specific content of the forced exhaust process will be described later.

  On the other hand, when the level of the output signal is less than the discharge threshold value in step SE-2 (step SE-2, No), it is monitored whether or not the mode selection switch 143 has been operated (step SE-4). . When the mode selection switch 143 is not operated (step SE-4, No), the control unit 180 monitors the output from the second gas sensor 132 again (step SE-1).

  When the mode selection switch 143 is operated (step SE-4, Yes), the control unit 180 determines the operation mode selected by the operation input via the mode selection switch 143 (step SE-5). If the selected mode is the “exhaust priority mode”, the exhaust priority process (step SE-6), and if the selected mode is the “environment priority mode”, the environment priority process (step SE-7), “ If it is “balance mode”, the balance process (step SE-8) is executed. Specific contents of these exhaust priority processing, environmental priority processing, and balance processing will be described later.

(Control processing of range hood system 101-forced exhaust processing)
Next, the forced exhaust process in step SE-3 will be described. FIG. 17 is a flowchart of forced exhaust processing. The forced exhaust process is a process in which non-odor substances that cannot be removed by the filter 121a of the deodorizer 120 are forcibly exhausted by the exhaust fan 112, and the purpose is to ensure safety by exhausting the non-odor substances.

  When the forced exhaust process is started, the control unit 180 causes the alarm output unit 160 to output an alarm via the alarm control unit 185 (step SF-1). Subsequently, the control unit 180 activates the exhaust fan 112 via the fan control unit 183, and causes the display unit 150 to display that the exhaust fan 112 is in operation via the display control unit 184 (step SF-2). ).

  Thereafter, the control unit 180 monitors the level of the output signal from the second gas sensor 132 via the detection control unit 182, and when the level of the output signal becomes less than the discharge threshold (No in step SF-3). Then, the alarm output by the alarm output unit 160 is stopped (step SF-4), and the exhaust fan 112 is stopped (step SF-5). When the exhaust fan 112 is stopped, even if the concentration of the non-odorous substance falls below the discharge threshold, the non-odorous substance can be discharged more completely if the exhaust fan 112 is operated for a predetermined time and then stopped. Can do.

(Control processing of range hood system 101-exhaust priority processing)
Next, the exhaust priority process in step SE-6 will be described. FIG. 18 is a flowchart of the exhaust priority process. The exhaust priority process is a process that preferentially executes the exhaust of gas by the exhaust fan 112, and is intended for reliable odor removal.

  When the exhaust gas priority processing is started, the control unit 180 monitors the level of the output signal from the first gas sensor 131 via the detection control unit 182, and the level of the output signal is stored in the storage unit 170 in advance. It is determined whether or not it is equal to or greater than the threshold value A (step SG-1). If the level of the output signal is equal to or higher than the exhaust threshold A (step SG-1, Yes), the control unit 180 activates the exhaust fan 112 via the fan control unit 183 and also via the display control unit 184. The display unit 150 displays that the exhaust fan 112 is operating (step SG-2).

  Thereafter, the control unit 180 monitors the level of the output signal from the first gas sensor 131 via the detection control unit 182, and the level of the output signal is less than the exhaust stop threshold B stored in advance in the storage unit 170. When it becomes (step SG-3, No), the exhaust fan 112 is stopped (step SG-4). Further, the control unit 180 activates the circulation fan 122 via the fan control unit 183, causes the display unit 150 to display that the circulation fan 122 is in operation via the display control unit 184, and further counts the time by the timer 181. Start (step SG-5).

  Thereafter, the control unit 180 monitors the level of the output signal from the first gas sensor 131 via the detection control unit 182 (step SG-6). As a result, when the level of the output signal from the first gas sensor 131 is equal to or higher than the circulation stop threshold C (step SG-6, Yes), the level of the output signal from the first gas sensor 131 is continuously monitored (step). SG-6). On the other hand, when the level of the output signal becomes less than the circulation stop threshold C stored in advance in the storage unit 170 (step SG-6, No), the control unit 180 refers to the timer 181 and starts the circulation fan 122. It is determined whether or not a predetermined time has elapsed (step SG-7). As a result, when the predetermined time has not elapsed (step SG-7, No), the controller waits until the predetermined time elapses, and when the predetermined time has elapsed (step SG-7, Yes), the control unit 180 stops the circulation fan 122 (step SG-8).

  Here, the exhaust threshold A is stored in the storage unit 170 as the concentration of the odorous substance that has reached a level at which the exhaust fan 112 needs to be discharged from the kitchen, and is the first threshold in the claims. Corresponding to. The exhaust stop threshold B is stored in the storage unit 170 as the concentration of the odorous substance that has been reduced to a level that does not need to be exhausted from the kitchen by the exhaust fan 112, and is the second threshold in the claims. Corresponding to The exhaust stop threshold B is stored in the storage unit 170 as a value smaller than the exhaust threshold A described above. The circulation stop threshold C is stored in the storage unit 170 as the concentration of the odorous substance that has been reduced to a level that does not need to be removed by the deodorizer 120. The circulation stop threshold C is stored in the storage unit 170 as a value smaller than the exhaust stop threshold B described above. Specific values of the exhaust threshold A, the exhaust stop threshold B, and the circulation stop threshold C can be arbitrarily determined based on experimental results and the like.

(Control processing of the range hood system 101-environment priority processing)
Next, the environment priority process in step SE-7 will be described. FIG. 19 is a flowchart of environment priority processing. The environmental priority process is a process in which removal of odorous substances by the deodorizer 120 is preferentially performed and the exhaust fan 112 is used as an auxiliary, and is intended to reduce energy loss accompanying a decrease in air conditioning efficiency. .

  When the control unit 180 starts the environment priority process, the control unit 180 monitors the level of the output signal from the first gas sensor 131 via the detection control unit 182, and the level of the output signal is stored in the storage unit 170 in advance. It is determined whether or not it is greater than or equal to the threshold value D (step SH-1). When the level of the output signal is equal to or higher than the circulation threshold D (step SH-1, Yes), the control unit 180 activates the circulation fan 122 via the fan control unit 183 and also via the display control unit 184. The display unit 150 displays that the circulating fan 122 is operating, and further starts the time measurement by the timer 181 (step SH-2).

  Next, the control unit 180 refers to the timer 181 and determines whether or not a predetermined time has elapsed since the activation of the circulation fan 122 (step SH-3). As a result, when the predetermined time has elapsed (step SH-3, Yes), the control unit 180 determines whether or not the level of the output signal from the first gas sensor 131 is equal to or higher than the exhaust threshold E ( Step SH-4). When the level of the output signal is less than the exhaust threshold E (step SH-4, No), the control unit 180 monitors the level of the output signal from the first gas sensor 131 via the detection control unit 182. If the level of the output signal is less than the circulation stop threshold F (step SH-5, No), the control unit 180 stops the circulation fan 122 (step SH-6).

  On the other hand, when the level of the output signal from the first gas sensor 131 is equal to or higher than the exhaust threshold E (step SH-4, Yes), the control unit 180 activates the exhaust fan 112 via the fan control unit 183, and The display unit 150 displays that the exhaust fan 112 is in operation via the display control unit 184 (step SH-7). Thereafter, the control unit 180 monitors the level of the output signal from the first gas sensor 131 via the detection control unit 182, and the level of the output signal is less than the exhaust stop threshold G stored in advance in the storage unit 170. When it becomes (step SH-8, No), the exhaust fan 112 is stopped (step SH-9). Thereafter, the control unit 180 continues to monitor the level of the output signal from the first gas sensor 131 via the detection control unit 182 and determines whether the level of the output signal is equal to or higher than the circulation stop threshold F (step). SH-5).

  Here, the circulation threshold value D is stored in the storage unit 170 as the concentration of the odorous substance that has reached a level that needs to be removed from the kitchen by the circulation fan 122, and is the third threshold value in the claims. Corresponding to The exhaust threshold E is stored in the storage unit 170 as the concentration of the odorous substance at a level at which the odorous substance cannot be sufficiently removed by the deodorizer 120 and needs to be discharged from the kitchen by the exhaust fan 112. Yes, corresponding to the fourth threshold in the claims. The circulation stop threshold F is stored in the storage unit 170 as the concentration of the odorous substance that has been reduced to a level that does not need to be removed by the deodorizer 120. The exhaust stop threshold G is stored in the storage unit 170 as the concentration of the odorous substance that has been reduced to a level that does not need to be exhausted from the kitchen by the exhaust fan 112. Specific values of the circulation threshold D, the exhaust threshold E, the circulation stop threshold F, and the exhaust stop threshold G can be arbitrarily determined based on experimental results and the like.

(Control processing of the range hood system 101-balance processing)
Next, the balance process in step SE-8 will be described. FIG. 20 is a flowchart of the balance process. The balance process is to use the exhaust of the gas by the exhaust fan 112 and the removal of the odorous substance by the deodorizer 120 at the same rate according to the concentration of the odorous substance. The purpose is to maintain a balance between reduction. Specifically, control processing is performed so that either the exhaust fan 112 or the circulation fan 122 is operated and the other is stopped according to the concentration of the odorous substance.

  When the control unit 180 starts the environment priority process, the control unit 180 monitors the level of the output signal from the first gas sensor 131 via the detection control unit 182, and the level of the output signal is stored in the storage unit 170 in advance. It is determined whether or not it is equal to or higher than a threshold value H (step SI-1). When the level of the output signal is equal to or higher than the circulation threshold value H (step SI-1, Yes), the control unit 180 activates the circulation fan 122 via the fan control unit 183 and via the display control unit 184. The display unit 150 displays that the circulation fan 122 is operating (step SI-2).

  Thereafter, the control unit 180 monitors the level of the output signal from the first gas sensor 131 via the detection control unit 182, and when the level of the output signal becomes less than the circulation threshold H (step SI-3, No), the circulation fan 122 is stopped (step SI-4). On the other hand, when the level of the output signal from the first gas sensor 131 is equal to or higher than the circulation threshold H (step SI-3, Yes), the control unit 180 determines whether the level of the output signal is equal to or higher than the exhaust threshold I. Is determined (step SI-5).

  When the level of the output signal is less than the exhaust threshold I (step SI-5, No), the level of the output signal is monitored again to determine whether it is equal to or higher than the circulation threshold H (step SI-3). . On the other hand, when the level of the output signal is equal to or higher than the exhaust threshold I (step SI-5, Yes), the control unit 180 stops the circulation fan 122 (step SI-6) and also via the fan control unit 183. The exhaust fan 112 is started (step SI-7).

  Thereafter, the control unit 180 monitors the level of the output signal from the first gas sensor 131 via the detection control unit 182, and when the level of the output signal becomes less than the exhaust threshold I (step SI-8, No), the exhaust fan 112 is stopped (step SI-9). Thereafter, the control unit 180 returns to step SI-1 and monitors the level of the output signal from the first gas sensor 131 via the detection control unit 182 again.

  Here, the circulation threshold value H is stored in the storage unit 170 as the concentration of the odorous substance that has reached a level that needs to be removed from the kitchen by the circulation fan 122, and is the fifth threshold value in the claims. Corresponding to The exhaust threshold I is stored in the storage unit 170 as a concentration of odorous substances at a level that needs to be discharged from the kitchen by the exhaust fan 112, and corresponds to the sixth threshold in the claims. . The circulation threshold H is stored in the storage unit 170 as a value smaller than the exhaust threshold I. Specific values of the circulation threshold value H and the exhaust gas threshold value I can be arbitrarily determined based on experimental results and the like.

  Even during the execution of the exhaust priority process, the environment priority process, or the balance process, the control unit 180 constantly monitors the level of the output signal from the second gas sensor 132 via the detection control unit 182. If the level of the output signal exceeds the discharge threshold, the forced exhaust process can be interrupted at an arbitrary time. When there is an input operation via the exhaust fan start switch 141 or the circulation fan start switch 142, the control unit 180 gives priority to the input operation and starts the exhaust fan 112 or the circulation fan 122 via the fan control unit 183. It can also be made.

(Effect of Embodiment 6)
As described above, according to the sixth embodiment, either one or both of the exhaust fan 112 and the circulation fan 122 are set according to the type and level of the gas detected by the first gas sensor 131 and the second gas sensor 132. Since it is selected and operated, gas such as odor and CO can be reliably processed without lowering the air conditioning efficiency.

  Further, in the exhaust priority process, exhaust of the gas by the exhaust fan 112 is preferentially executed, and after the concentration of the odorous substance is sufficiently reduced, the exhaust fan 112 is not operated more than necessary and the remaining odorous substance is left. Is processed by the deodorizer 120. Thereby, while being able to process an odor substance reliably, the fall of air-conditioning efficiency can be suppressed to the minimum.

  In the environment priority process, the removal of odorous substances by the deodorizer 120 is preferentially executed, and when the removal by the deodorizer 120 is insufficient, the exhaust fan 112 is operated as an auxiliary. Thereby, while being able to remove an odorous substance using the deodorizing machine 120, operation | movement of the exhaust fan 112 can be suppressed to the minimum required, and the fall of air-conditioning efficiency can be suppressed.

  Further, in the balance process, the exhaust of the gas by the exhaust fan 112 and the removal of the odorous substance by the deodorizer 120 are separately used at the same rate according to the concentration of the odorous substance, so that the odorous substance can be reliably removed. It is possible to maintain an appropriate balance between the reduction of energy loss accompanying the decrease in air conditioning efficiency.

Further, in the forced exhaust process, non-odorous substances that cannot be removed by the filter 121a of the deodorizer 120 are forcibly exhausted by the exhaust fan 112, so that CO, CO ₂ , city gas having a certain concentration or more are exhausted. When non-odorous substances such as these are detected, they can be reliably exhausted to ensure safety.

  In addition, when a non-odor substance having a certain concentration or more is detected, the alarm output unit 160 outputs an alarm, so that the user can be alerted.

[Embodiment 7]
Finally, Embodiment 7 will be described. This form is a form in which the range hood body and the removing means are integrally formed with each other.

  The configuration of the seventh embodiment is substantially the same as the configuration of the sixth embodiment unless otherwise specified. The configuration substantially the same as the configuration of the sixth embodiment is the same as that used in the sixth embodiment. The same reference numerals and / or names are attached as necessary, and the description thereof is omitted.

(Configuration of range hood system 101)
The configuration of the range hood system 101 according to the seventh embodiment will be described. FIG. 21 is a perspective view showing the appearance of the range hood system 101 according to the seventh embodiment, FIG. 22 is a view showing the range hood system 101 in FIG. 21, (a) is a front view, and (b) is a side view. FIG. 23 is a block diagram functionally conceptually showing the electrical configuration of the range hood system 101 shown in FIGS. 21 and 22. As shown in these drawings, the seventh embodiment has a configuration in which a deodorizer is incorporated in the range hood main body 111.

(Configuration of range hood system 101-range hood main body 111)
In the seventh embodiment, the range hood main body 111 includes a partition plate 111c, a switching damper 111e, a second duct 111d, and an outlet opening 111f.

  The partition plate 111c is disposed inside the range hood main body 111, and divides the internal space of the range hood main body 111 into a first duct 111b and a second duct 111d. The switching damper 111e is for switching the gas introduced into the inside of the range hood main body 111 from the exhaust opening 111a through the exhaust fan 112 to the first duct 111b or the second duct 111d. It is arranged inside the range hood main body 111. The second duct 111d is a ventilation path from the exhaust opening 111a to the blowout opening 111f via the exhaust fan 112 and the switching damper 111e, and a circulation path for circulating air between the inside of the range hood and the kitchen. It is. Inside the second duct 111d, a filter 121a is disposed between the switching damper 111e and the blowout opening 111f. The blowout opening 111f is a blowout for returning the air that has passed through the filter 121a into the kitchen. Although the specific shape and arrangement | positioning of the blowing opening part 111f are arbitrary, it can form in the upper position of the front of the range hood main body 111 as a plurality of horizontally long slits, for example.

  In the range hood system 101 configured as described above, the exhaust fan 112 also functions as the circulation fan 122 in the sixth embodiment. Moreover, the exhaust opening 111a and the blowing opening 111f of the range hood main body 111 correspond to the inlet 121c and the outlet 121d of the deodorizer 120 in the sixth embodiment, respectively. Thus, in this Embodiment 7, it has the structure by which the range hood main body 111 and the deodorizer were integrally formed mutually.

(Configuration of range hood system 101-gas sensor 130)
Further, in the seventh embodiment, the first gas sensor 131 is disposed in the vicinity of the blowout opening 111f and can easily detect odorous substances contained in the air blown from the blowout opening 111f. ing. Therefore, when the performance of the filter 121a is deteriorated by adsorbing a large amount of odorous substances, the odorous substance that has not been removed by the filter 121a and has flowed out of the outlet opening 111f can be detected by the first gas sensor. Therefore, it is possible to grasp the performance deterioration of the filter 121a at an early stage.

(Configuration of range hood system 101-operation unit 140)
In the seventh embodiment, the operation unit 140 includes a switching damper operation switch 144 instead of the circulation fan activation switch 142 in the sixth embodiment. The switching damper operation switch 144 is an operation means for operating the switching damper 111e.

(Configuration of Range Hood System 101-Fan Control Unit 183)
The fan control unit 183 in the seventh embodiment controls the operation of the exhaust fan 112 and the operation of the switching damper 111e.

(Operation of range hood system 101)
In the seventh embodiment, the control unit 180 operates the switching damper 111e via the fan control unit 183, and the air introduced into the inside of the range hood main body 111 from the exhaust opening 111a via the exhaust fan 112. By flowing into the first duct 111b or the second duct 111d, gas is exhausted by the exhaust fan 112 or odorous substances are removed through the filter 121a.

  For example, when the air introduced into the inside of the range hood main body 111 from the exhaust opening 111a through the exhaust fan 112 is caused to flow into the first duct 111b by operating the switching damper 111e, the inflowed air Is discharged from the first duct 111b to the outside of the kitchen.

  On the other hand, when the air introduced into the inside of the range hood main body 111 from the exhaust opening 111a through the exhaust fan 112 is caused to flow into the second duct 111d by operating the switching damper 111e, the inflowed air Passes through the filter 121a inside the second duct 111d, and after the odorous substance is removed, is returned to the inside of the kitchen through the blowout opening 111f. In addition, when the level of the output signal from the first gas sensor 131 disposed in the vicinity of the blowout opening 111f becomes a certain value or more, the blowout opening is generated by the control unit 180 along with the deterioration of the filter 121a. It may be determined that an odorous substance has flowed out from the unit 111f, and an alarm may be issued via the alarm output unit 160. This can prompt the user to replace the filter 121a early. Further, when it is determined that the filter 121a is deteriorated, the switching damper 111e may be operated by the fan control unit 183, and the odorous substance may be discharged outside the kitchen via the first duct 111b. .

  Furthermore, the switching damper 111e can be operated so that the air introduced into the range hood main body 111 from the exhaust opening 111a through the exhaust fan 112 can flow into both the first duct 111b and the second duct 111d. . In this case, by controlling the operating position of the switching damper 111e, the ratio of the air flowing into each of the first duct 111b and the second duct 111d can be adjusted as appropriate, and odorous substances can be reliably removed. A balance can be maintained with the reduction of energy loss.

(Effect of Embodiment 7)
As described above, according to the seventh embodiment, the range hood main body 111 and the deodorizer are integrally formed with each other, so that the range hood system 101 can have a compact configuration. In addition, since the first gas sensor 131 is disposed in the vicinity of the blowout opening 111f, it is possible to grasp the outflow of odorous substances accompanying the deterioration of the filter 121a at an early stage and prompt the user to replace the filter 121a. Can do.

[III] Modifications to Each Embodiment While each embodiment according to the present invention has been described above, the specific configuration and means of the present invention are the same as the technical idea of each invention described in the claims. Modifications and improvements can be arbitrarily made within the range. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved.

(About the mutual relationship of each embodiment)
Each embodiment can be implemented in combination with each other. For example, when the main fan is activated, the control processing of the first and second embodiments is performed, and when the sub fan and the main fan are not activated, the control of the third and fourth embodiments is performed. A range hood system for processing can also be constructed.

  Similarly to the first gas sensor 131 in the seventh embodiment, the first gas sensor 131 is disposed in the vicinity of the circulation opening 121b in the deodorizer 120 of the sixth embodiment, and the odor flows out from the circulation opening 121b. You may comprise so that a substance may be detected. Thereby, the performance degradation of the filter 121a in the deodorizer 120 can be grasped at an early stage.

  Further, the range hood 1 in the first embodiment and the range hood 110 in the sixth embodiment may be combined, and various gases including odorous substances may be exhausted by the sub fan 4. Since the sub fan 4 exhausts through the second exhaust opening 2b, the gas staying near the ceiling can be effectively exhausted.

(Regarding control of each embodiment)
In FIG. 8 of the third embodiment, when the gas monitoring interval comes, the sub fan is activated to monitor the gas level. However, the present invention is not limited to this, and the sub fan is constantly monitored when the warning level is exceeded. May be activated to discharge gas.

(About each threshold value that the control unit refers to)
In the above-described sixth and seventh embodiments, it has been described that each threshold value referred to by the control unit 180 is stored in the storage unit 170 in advance, but each threshold value may be arbitrarily modified. For example, a switch for changing the threshold value may be provided in the operation unit 140 so that the threshold value can be modified according to a user request.

(About sensor)
In the above-described sixth and seventh embodiments, the control unit 180 controls the operation of the exhaust fan 112 and the circulation fan 122 according to the type and level of gas detected by the first gas sensor 131 and the second gas sensor 132. However, a temperature sensor and a humidity sensor may be provided, and control may be performed according to the level and change of the temperature and humidity detected by these sensors. For example, as a result of starting the exhaust priority process, when the temperature or humidity changes at a change rate of a certain value or more, the control unit 180 determines that the air-conditioning efficiency is reduced, and automatically performs the environment priority process. You may make it switch.

(About range hood)
In Embodiments 6 and 7 described above, various gases such as odorous substances are exhausted from a room such as a kitchen by the exhaust fan 112 of the range hood 110, but instead of the range hood 110 or in combination with the range hood 110. A ventilation fan may be installed, and various gases may be discharged by the ventilation fan. Thereby, it becomes possible to exhaust various gas from the whole room | chamber interior, such as a kitchen, with the ventilation fan arrange | positioned in the place suitable for ventilation, and can improve exhaust efficiency. Thus, by using a ventilation fan in place of the range hood 110, the present invention can be applied to a ventilation system.

  In Embodiment 7 described above, both exhaust and deodorization are performed through the exhaust opening 111a of the range hood main body 111. However, the present invention is not limited to this, and exhaust and deodorization are performed through different paths. It may be done. For example, air containing odorous substances is sucked from the second exhaust opening 2b shown in FIG. 2A, and then returned to the room again through a route different from the exhaust via the sub fan 4 and a filter for deodorization. You may comprise.

  It can be used as a range hood system including a range hood arranged at an arbitrary position including a kitchen, and is particularly useful for effectively detecting and discharging various gases such as odor, CO, gas leakage, or smoke. It is.

It is a perspective view which shows the external appearance of the range hood system which concerns on Embodiment 1 of this invention. It is a figure which shows the range hood system of FIG. 1, Comprising: (a) is a front view, (b) is a side view. It is a block diagram which shows the electric structure of a range hood functionally. It is a flowchart of the control processing of a range hood system. It is a block diagram which shows the electric structure of the range hood system which concerns on Embodiment 2 functionally conceptually. It is a flowchart of the control processing of a range hood system. It is a block diagram which shows the electric structure of the range hood system which concerns on Embodiment 3 functionally conceptually. It is a flowchart of control of a range hood system. It is a side view which shows the whole structure of the building in which the range hood system which concerns on Embodiment 4 was installed. It is a block diagram which shows the electric structure of the range hood which concerns on Embodiment 4 functionally conceptually. It is a flowchart of the control processing of a range hood system. It is a block diagram which shows the electric structure of the range hood system which concerns on Embodiment 5 functionally conceptually. It is a perspective view which shows the external appearance of the range hood system which concerns on Embodiment 6. FIG. It is a figure which shows the range hood system of FIG. 13, Comprising: (a) is a front view, (b) is a side view. It is a block diagram which shows the electric structure of a range hood system functionally conceptually. It is a flowchart of the control processing of a range hood system. It is a flowchart of a forced exhaust process. It is a flowchart of an exhaust priority process. It is a flowchart of an environment priority process. It is a flowchart of a balance process. It is a perspective view which shows the external appearance of the range hood system which concerns on Embodiment 7. FIG. It is a figure which shows the range hood system of FIG. 21, Comprising: (a) is a front view, (b) is a side view. It is the block diagram which showed the electrical structure of the range hood system functionally conceptually.

Explanation of symbols

1, 20, 30, 40, 50, 110 Range hood 2, 111 Range hood body 2a First exhaust opening 2b Second exhaust opening 2c, 111c Partition plate 2d Main duct 2e Sub duct 3 Main fan 4 Sub fan 5 , 41, 130 Gas sensor 6 Main fan start switch 7, 150 Display unit 7a, 151 Liquid crystal panel 7b, 152 Gas level display unit 7c Sub fan start lamp 8, 160 Alarm output unit 9, 170 Storage unit 10, 21, 31, 42 , 180 Control unit 10a, 181 Timer 10b, 182 Detection control unit 10c, 183 Fan control unit 10d, 184 Display control unit 10e, 185 Alarm control unit 21a Counter 43 Inlet 51 Control panel 52 Ventilation fan 100, 199 Stove 101 Range hood system 111a Exhaust opening 11b 1st duct 111d 2nd duct 111e Switching damper 111f Outlet opening 112 Exhaust fan 120 Deodorizer 121 Deodorizer body 121a Filter 121b Circulation opening 121c Inlet 121d Outlet 122 Circulation fan 131 First gas sensor 132 Second gas sensor 140 Operation part 141 Exhaust fan start switch 142 Circulation fan start switch 143 Mode selection switch 144 Switching damper operation switch 153 Odor level display part

Claims (18)

A range hood body that divides the exhaust path;
An exhaust means for exhausting through the exhaust path;
A first gas sensor disposed in the vicinity of the range hood body;
Control means for controlling at least the exhaust means based on an output from the first gas sensor;
A range hood system comprising: The control means starts the exhaust means when the level of the output from the first gas sensor exceeds a predetermined discharge threshold while the exhaust means is stopped;
The range hood system according to claim 1. The control means stops the exhaust means when the cumulative number of activations reaches a predetermined gas discharge completion number when the exhaust means is activated.
The range hood system according to claim 1 or 2, wherein The control means performs air collection by activating the exhaust means, and performs predetermined control based on an output from the first gas sensor during the air collection;
The range hood system according to any one of claims 1 to 3, wherein: As said exhaust means, the 1st exhaust means which collects air via the 1st exhaust opening formed in the lower surface of the said range hood, and the 2nd exhaust opening formed in the side surface upper part of the said range hood A second exhaust means for collecting air through
The control means activates the second exhaust means when the output from the first gas sensor exceeds a predetermined discharge threshold;
The range hood system according to any one of claims 1 to 4, wherein: The control means collects air by activating the second exhaust means, and when the output from the first gas sensor during the air collection exceeds a predetermined gas warning threshold, Activating one exhaust means,
The range hood system according to claim 5. A second gas sensor arranged separately from the range hood,
The control means performs predetermined control based on an output from the first gas sensor and an output from the second gas sensor;
The range hood system according to any one of claims 1 to 6, wherein: The control means includes
Activating the exhaust means when the output from the second gas sensor exceeds a predetermined distant gas warning threshold while the exhaust means is stopped;
Whether or not the output from the first gas sensor has exceeded a predetermined proximity gas warning threshold within a predetermined gas arrival monitoring time since the output from the second gas sensor has exceeded a predetermined remote gas warning threshold Determining and performing predetermined control based on the determination result;
The range hood system according to claim 7. Provided with an alarm output means for outputting an alarm,
The control means controls the alarm output means to output an alarm;
The range hood system according to any one of claims 1 to 8, wherein Gas level display means for displaying the gas level detected by the first gas sensor;
The range hood system according to any one of claims 1 to 9, wherein: The gas sensor is an odor sensor;
The range hood system according to any one of claims 1 to 10, wherein: Removing means for removing a part of the substance contained in the air from the air;
Circulating means for circulating air between the inside and the outside of the removing means,
The first gas sensor is disposed in the vicinity of the range hood body or the removing means,
The control means controls the exhaust means and the circulation means based on an output from the first gas sensor;
The range hood system according to claim 1. The control means includes
When the output level from the first gas sensor exceeds a first threshold value while the exhaust means and the circulation means are stopped, the exhaust means is activated,
If the output level from the first gas sensor becomes equal to or lower than a second threshold value smaller than the first threshold value after the exhaust means is started, the exhaust means is stopped and the circulation means is started. thing,
The range hood system according to claim 12. The control means includes
When the output level from the first gas sensor exceeds a third threshold value while the exhaust means and the circulation means are stopped, the circulation means is activated,
Activating the exhaust means when the level of the output from the first gas sensor exceeds a fourth threshold after elapse of a predetermined standby time from the activation of the circulation means;
The range hood system according to claim 12 or 13, characterized by the above-mentioned. The control means includes
When the level of the output from the first gas sensor exceeds a fifth threshold, the circulating means is operated;
Operating the exhaust means when the level of the output from the first gas sensor exceeds a sixth threshold value that is greater than the fifth threshold value;
The range hood system according to any one of claims 12 to 14, wherein A second gas sensor disposed in the vicinity of the range hood body or the removal means for detecting a substance that cannot be removed by the removal means;
The control means operates the exhaust means when the level of the output from the second gas sensor exceeds a seventh threshold;
The range hood system according to any one of claims 12 to 15, wherein Provided with an alarm output means for outputting an alarm,
The control means controls the alarm output means to output an alarm when the output level from the second gas sensor exceeds the seventh threshold;
The range hood system according to claim 16. The range hood body and the removing means are formed integrally with each other;
The range hood system according to any one of claims 12 to 17, wherein

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