JP4875373B2 - Range hood fan - Google Patents

Description

  The present invention relates to a range hood fan, and more particularly, to a range hood fan capable of efficiently exhausting exhaust gas remaining in the vicinity of a ceiling.

The conventional range hood fan is installed so that exhausts such as oil smoke, odors, and steam rising from a cooking table or the like during cooking are sucked as efficiently as possible and exhausted to the outside. In recent years, in addition to the one installed along the wall of the cooking chamber, a so-called center hood type range hood fan has been developed that does not follow the wall, that is, a high-performance fan that meets the original purpose. Has been.
However, as can be said with any range hood fan, it is practically impossible to suck and exhaust 100% of exhaust gas such as oil smoke, odor, and steam generated from the cooking table. Naturally, the exhaust that could not be inhaled by the range hood fan rose, stayed mainly near the ceiling of the cooking chamber, diffused naturally with time and remained odor even after cooking It has become.

In order to solve the above-described problems, the conventional range hood has a second suction port in a portion corresponding to the ceiling surface in the upper portion of the hood main body, and exhaust gas staying near the ceiling from the suction port is provided. Some are configured to be sucked and exhausted. (See patent literature)
Among these things, the exhaust that stays near the ceiling as well as the exhaust that is generated at the cooking table by one exhaust fan, and the exhaust that stays near the ceiling are dedicated in addition to the main exhaust fan Some have an auxiliary fan to suck in.
However, these range hood fans are provided with a second suction port, so that the main exhaust efficiency is lowered, and because the auxiliary fan is small, the suction power is relatively weak, and a large amount of exhaust gas stays near the ceiling. In such a case, it takes a considerable time to exhaust the gas.
JP 2005-90878 A Japanese Patent Laid-Open No. 10-205846 JP-A-8-271000

  The present invention has been made in view of the above-described conventional circumstances, and the purpose of the present invention is to selectively change the operating state of the range hood fan in accordance with the state of occurrence of exhaust gas. An object of the present invention is to enable rapid exhaust of the exhaust gas staying near the ceiling while maintaining the exhaust efficiency.

The present invention employs the following technical means in order to achieve the above object.
A range hood fan according to a first aspect of the present invention includes a hood main body having an upper portion located near the ceiling of the room and a lower portion provided with a suction port. A main exhaust fan is provided in the lower portion of the internal space of the hood main body. An upper exhaust fan is installed in the upper position of the internal space of the hood body, and the exhaust sucked from the suction port at the lower portion of the hood body is exhausted from the main exhaust fan to the outside through an exhaust duct, An upper suction port is opened at the top of the main unit so that it faces the inlet of the upper exhaust fan, and the exhaust port of the upper exhaust fan is connected to the exhaust duct, and both exhaust fans are configured in the hood body. The first damper is provided in the middle part of the communication path, and the first damper closes the middle of the communication path to connect the hood main body suction port and the main exhaust fan. It is configured to selectively move between an intermediate closed position that allows communication and a lower closed position that closes the space between the main exhaust fan and the hood main body inlet and opens the middle of the communication path. A second damper is provided in the middle, and the second damper closes the upper exhaust position by closing the exhaust port of the upper exhaust fan to open the exhaust duct, and closes the exhaust port of the main exhaust fan to exhaust the upper exhaust fan. It is configured to selectively move between a main exhaust closing position where the opening is opened and an intermediate position between the both closing positions and where both the exhaust fans are opened.
The operation of the first damper and the second damper described above may be performed using a drive motor or the like, or may be performed manually by a user. The driving of the main exhaust fan and the upper exhaust fan may be individually controlled using an existing control mechanism, or may be controlled in conjunction with the operation of the first damper and the second damper. Further, the shape, size, number, and the like of the upper suction port described above may be arbitrarily changed.
The range hood fan operates only the main exhaust fan, operates the main exhaust mode in which the first damper is moved to the intermediate closed position and the second damper is moved to the upper closed position, and only the upper exhaust fan is operated. The upper exhaust mode in which one damper is moved to the intermediate closed position and the second damper is moved to the main exhaust closed position, and both the main exhaust fan and the upper exhaust fan are operated, and the first damper is in the lower closed position and the second damper is A control mechanism that selectively controls the operation of the upper rapid exhaust mode for moving to an intermediate position is provided.
The above control mechanism changed the combination of the movement positions of the first damper and the second damper and the operation of the main exhaust fan and the upper exhaust fan together with the main exhaust mode, the upper exhaust mode, and the upper rapid exhaust mode. Other exhaust modes may be provided.

A range hood fan according to a second aspect of the present invention comprises an exhaust introduction skirt member that is inclined from a ceiling surface toward the upper suction port on an upper peripheral surface of a hood main body. As long as the skirt member is inclined from the ceiling surface toward the upper suction port, the size and the inclination angle may be arbitrarily changed.

According to the edge member for a range hood of the present invention, the following excellent actions and effects can be expected.
A range hood fan according to a first aspect of the present invention has a main exhaust fan installed at a lower position of the internal space of the hood main body, and an upper exhaust fan installed at an upper position of the internal space of the hood main body. Exhaust air sucked from the main exhaust fan is exhausted through the exhaust duct, and an upper suction port is opened at the top of the hood body. The exhaust port of the upper exhaust fan is connected to the exhaust duct, The fans are connected to each other via a communication path in the hood main body, and a first damper is provided at an intermediate portion of the communication path, and the first damper closes the middle of the communication path to close the hood main body suction port and the main exhaust fan. Is selectively moved between an intermediate closed position that allows communication between the main exhaust fan and the hood body suction port, and a lower closed position that opens the middle of the communication path. And a second damper is provided in the middle of the exhaust duct. The second damper closes the exhaust port of the upper exhaust fan to open the exhaust duct, and the exhaust of the main exhaust fan. It is configured to selectively move between a main exhaust closing position where the opening is closed and the exhaust opening of the upper exhaust fan is opened, and an intermediate position where both the exhaust fans are opened.
Therefore, the user selectively sets the drive of both exhaust ducts and the positions of the first and second dampers, so that the suction of the exhaust from the suction port at the lower portion of the hood body using the main exhaust fan and the upper exhaust Efficiently chooses the most suitable operating mode according to the state of exhaust generation, such as suction from the upper suction port using a fan and both exhaust fans co-operating from the upper suction port or rapid suction from the lower suction port Exhaust can be performed.
In addition, when the exhaust gas stays near the ceiling, the upper exhaust fan can be operated, and the air can be sucked and discharged efficiently from the upper suction port with a low air volume, and the exhaust gas staying near the ceiling. If a large amount of air is generated, or if you want to exhaust the exhaust generated on the ceiling in a short time, you can use the suction power of both exhaust fans to quickly suck from the upper suction port and quickly exhaust it. Yes, oily smoke and odor residue can be effectively removed.
The range hood fan operates only the main exhaust fan, operates the main exhaust mode in which the first damper is moved to the intermediate closed position and the second damper to the intermediate closed position, and operates only the upper exhaust fan. The upper exhaust mode in which one damper is moved to the intermediate closed position and the second damper is moved to the main exhaust closed position, and both the main exhaust fan and the upper exhaust fan are operated, and the first damper is in the lower closed position and the second damper is A control mechanism that selectively controls the operation of the upper rapid exhaust mode for moving to an intermediate position is provided.
Therefore, the user simply selects an arbitrary mode from the above-described three exhaust modes according to the state of exhaust generation, so that the exhaust rising from the cooking table can be efficiently sucked and discharged, and from problems such as sick house In order to discharge a small amount of chemical pollutants contained in the indoor air to the outdoors, so-called 24-hour ventilation (always ventilating) and rapid aspiration of the exhaust near the ceiling in a short time The quick removal can be performed easily and rationally.

The range hood fan according to the second aspect of the present invention is provided with a skirt member for exhaust introduction that is inclined from the ceiling surface toward the upper suction port on the upper peripheral surface of the hood main body, and suction starts from the upper suction port. In this case, the exhaust gas stagnating in the vicinity of the ceiling is guided toward the upper suction port along the inclination of the skirt member, so that the exhaust suction efficiency can be improved. In addition, the ceiling surface near the suction port, which is relatively dirty due to the suction of exhaust gas, can be covered with the skirt member, which contributes to preventing the ceiling portion from being stained. Furthermore, the skirt portion is installed along the hood main body and the ceiling, so that the reinforcing effect of the hood main body can be obtained.

The best mode for carrying out the range hood fan of the present invention will be described below with reference to FIGS.
1 and 2 show a range hood fan A embodying the present invention. In many cases, the range hood fan is installed so as to be incorporated in the system kitchen of the cooking chamber. However, the range hood fan A of the present invention protrudes downward from the ceiling surface B at an appropriate distance from the wall surface of the cooking chamber. It is the type that is installed in the form, so-called center hood. A cooking table is installed under the range hood fan A, and exhaust gas such as oil smoke and steam rises with cooking.
The range hood fan A has a rectangular hood main body 1 with a square cross section, and is installed so that the hood main body 1 extends downward from the ceiling surface B by attaching and fixing the upper end of the hood main body 1 to the ceiling surface B. It is. A hood 1a is attached to the lower end of the hood main body 1 so as to expand, and constitutes a suction port 1b for sucking exhaust gas rising from the cooking table. A rectifying plate 11 is mounted in the suction port, and a filter 12 is mounted on the rectifying plate 11.

  A sirocco-type main exhaust fan 2 is installed in the lower part of the internal space of the hood body 1, the back side to which the drive motor 2 c is fixed is attached and fixed to the hood body 1 side plate, and the suction port 2 a on the front side is sideways. The hood main body is arranged so as to be located substantially at the center. Further, an exhaust port 2 b opened in the outer peripheral portion of the main exhaust fan 2 is directed upward in the hood body 1 and is connected to an exhaust duct 4. The exhaust duct 4 is a cylindrical body having a rectangular cross section, and extends vertically to the top of the hood body 1 and is configured to pass through the ceiling surface B and connect to the external exhaust duct 40 to exhaust the exhaust toward the outside. It is.

  An upper exhaust fan 3 is provided in the upper part of the internal space of the hood body 1. The upper exhaust fan 3 is a relatively small sirocco-type fan, and is horizontally attached and fixed in a state where the suction port faces the upper end of the hood body 1. The size of the upper exhaust fan 3 may be such that the air volume is about 1/4 to 1/5 that of the main exhaust fan 2. Further, the exhaust port 3b opened on the outer periphery of the upper exhaust fan 3 is inserted into the side surface of the exhaust duct 4 and connected so as to protrude somewhat inside the exhaust duct 4 (FIG. 1). A second damper 6 is attached to the exhaust port 3b of the exhaust duct 4 and will be described later.

Upper suction ports 7 having slits arranged in parallel at a small interval are provided on the four surrounding surfaces near the upper end of the hood body 1 described above. The upper suction port 7 is an opening for sucking the exhaust gas remaining in the vicinity of the ceiling surface B, and is disposed so as to face the suction port 3a of the upper exhaust fan 3 provided in the hood main body 1.
A skirt member 8 is attached to the ceiling surface B along the four sides of the upper end of the hood body 1. The skirt member 8 is a rectifying plate for efficiently guiding the exhaust gas staying in the vicinity of the ceiling surface B to the upper suction port 7 opened on the peripheral surface of the hood body 1 as described above. It is attached so as to incline toward 7 above. In addition, you may change arbitrarily the width | variety and cross-sectional shape of this skirt member as needed. For example, it is optional to appropriately curve the cross section of the skirt member or increase or decrease the inclination angle.

A communication path 9 that connects the upper exhaust fan 3, the main exhaust fan 2, and the lower end of the hood main body 1 serving as a suction port is formed on one side in the internal space of the hood main body 1. The communication path 9 communicates the exhaust sucked from the suction port 1b and the upper suction port 7 to the suction port 2a of the main exhaust fan 2, respectively, and a first damper 5 is provided at an intermediate portion thereof.
The first damper 5 is provided at a position facing the suction port 2 a of the main exhaust fan 2, and is pivotally supported by a partition plate 51 provided in the hood body 1 so as to be rotatably supported. Further, the periphery of the main exhaust fan 2 in the hood main body 1 is surrounded by partition plates 52 and 53, and both end portions on the suction port 2a side are bent and extended toward the shaft support position of the first damper 5. An opening 50 a and an opening 50 b are formed between the extended edge and the partition plate 51 that pivotally supports the first damper 5, and the openings 50 a and 50 b are opened and closed by the operation of the first damper 5. It is comprised so that it may do.
Both the openings 50a and 50b are the two operating positions of the first damper 5, that is, the intermediate closing position 5a and the lower closing position 5b.

The intermediate closing position 5a of the first damper 5 is between the suction port 2a of the main exhaust fan 2 and the upper exhaust fan 3 in the communication path 9, that is, the opening 50a is closed, and the suction port 2a of the main exhaust fan 2 and the suction 1b. It is an operation position which makes it communicate between (FIG. 1). On the other hand, the lower closing position 5b of the first damper 5 closes between the suction port 2a of the main exhaust fan 2 and the suction 1b, that is, the opening 50b, and the suction port 2a of the main exhaust fan 2 and the upper exhaust fan 3 It is an operation position which makes the connection path 9 between communicate.
The first damper 5 described above has a support shaft 5c connected to a drive motor 5d, and is configured to move between the intermediate closed position 5a and the lower closed position 5b by driving the drive motor 5d.

A second damper 6 is provided in a portion of the exhaust duct 4 facing the exhaust port 3 b of the upper exhaust fan 3.
The second damper 6 is rotatably supported by being placed in the exhaust duct 4, and an opening 40 provided immediately after the exhaust port 3 b of the upper exhaust fan 3 and the exhaust port 2 b of the main exhaust fan 2 of the exhaust duct 4. Are configured to open and close. The exhaust port 3b and the opening 40 of the upper exhaust fan 3 described above are portions where the second damper operates, that is, the upper closing position 6a and the main exhaust closing position 6b.
The upper closing position 6a of the second damper 6 is an operating position in which the exhaust duct 4 is opened by closing the exhaust port 3b of the upper exhaust fan 3 (FIG. 1). The main exhaust closing position 6 b of the second damper 6 is an operating position where the opening 40 immediately after the exhaust port 2 b of the main exhaust fan 2 is closed and the exhaust port 3 b of the upper exhaust fan 3 is opened. Further, the operation position of the second damper 6 is an intermediate position 6c between the upper closing position 6a and the main exhaust closing position 6b and opening both the exhaust port 3b and the opening 40.
Similarly to the first damper 5, the second damper 6 is pivotally supported on the base end side by a support shaft 6e, and driven by a drive motor 6d connected to the support shaft 6e, the upper closing position 6a The main exhaust closing position 6b and the intermediate position 6c are configured to move.

The range hood fan A configured as described above includes a control unit 10 including an operation panel 10a on the front surface of the hood 1a. The control unit 10 controls the driving of the main exhaust fan 2 and the upper exhaust fan 3 and the operations of the first damper 5 and the second damper 6, and drives both the exhaust fans 2 and 3 through electrical means. It is in communication with the motors 2c and 3c and the drive motors 5d and 6d of both dampers.
The control unit 10 described above operates the main exhaust mode in which only the main exhaust fan 2 is operated, the upper exhaust mode in which only the upper exhaust fan 3 is operated, and the suction from the upper suction port 7 by operating both the exhaust fans 2 and 3 together. It has three exhaust modes with the upper quick exhaust mode. Therefore, the user can easily perform efficient exhaust by operating the operation panel 10a according to the use state of the cooking table and selecting an arbitrary mode from these exhaust modes.

Next, the operation in each exhaust mode will be described.
In normal use, it operates in the main exhaust mode in which the exhaust gas rising from the cooking table is sucked from the suction port 1b of the hood 1a. In the main exhaust mode, only the main exhaust fan 2 is driven, the first damper is moved to the intermediate closed position 5a, and the second damper 6 is moved to the upper closed position 6a (FIG. 3). As a result, the exhaust sucked from the suction port 1b of the hood 1a passes through the main exhaust fan 2 through the opening 50b, passes through the opening 40 immediately after the exhaust port 2b, and the exhaust duct 40, and is discharged to the outside. At this time, the upper exhaust fan 3 is stopped and its exhaust port is closed by the second damper 6, so that the exhaust gas passing through the exhaust duct 4 does not leak to the outside.

  For example, regardless of whether or not exhaust gas stays along the ceiling surface B, the upper exhaust mode in which only the upper exhaust fan 3 is operated can be used as ventilation (normal ventilation) in which indoor air is continuously operated for 24 hours. In the upper exhaust mode, only the upper exhaust fan 3 is operated, the first damper 5 is moved to the intermediate closed position 5a, and the second damper 6 is moved to the main exhaust closed position 6b (FIG. 4). As a result, the room air in the kitchen and living / dining room is gently sucked from the upper suction port 7 at the top of the hood body 1 with a low air volume, passes through the upper exhaust fan 3, and flows into the exhaust duct 4 from the exhaust port 3b. It is discharged outside the room. In this state, the opening 40 on the exhaust port 2b side is closed by the second damper 6, so that the exhaust in the exhaust duct 4 does not flow backward.

In addition, when a large amount of exhaust gas stays on the ceiling surface B during cooking, the upper exhaust fan 3 and the main exhaust fan 2 may be operated in the upper rapid exhaust mode.
In the upper rapid exhaust mode, the upper exhaust fan 3 and the main exhaust fan 2 are operated together, the first damper 5 is moved to the lower closed position 5b, and the second damper 6 is moved to the intermediate position 6c (FIG. 5). The intermediate position 6 c of the second damper 6 is a position that is divided so that the opening area is commensurate with the capabilities of the main exhaust fan 2 and the upper exhaust fan 3.
As a result, the suction force of the two exhaust fans 2 and 3 is applied to the upper suction port 7 at the top of the hood body 1, and the exhaust gas staying in the vicinity of the ceiling surface B is rapidly sucked from the upper suction port 7. After passing through 3, the exhaust duct 4 joins and is discharged to the outside. This upper rapid exhaust mode is extremely effective in removing exhaust gas staying on the ceiling surface B in a short time.

In addition to the three exhaust modes described above, the range hood fan A may set an arbitrary exhaust mode by changing the combination of the operation of both exhaust fans 2 and 3 and the movement position of both dampers. For example, both the exhaust fans 2 and 3 are operated, the first damper 5 is moved to the intermediate closed position 5a, and the second damper 6 is moved to the intermediate position 6c, so that the suction port 1b of the hood 1a and the upper suction are moved. Exhaust gas can be sucked from both ports 7.
In the above-described embodiment, several exhaust modes are set in the control unit 10 and an appropriate exhaust mode is selected in accordance with the use situation. However, the range hood fan of the present invention is a dual exhaust fan 2. , 3 and the movement position of the dampers 5 and 6 are set by the user while directly operating the operation panel 10a, so that the optimum operation mode can be selected according to the use situation. Also good.
In addition, although the range hood fan A of the said Example is a center hood type | mold, this invention is not limited to this, It applies to the range hood fan of the form installed along the wall of a cooking chamber with a system kitchen. You can also.

The vertical side view which shows the range hood fan of this invention. II-II sectional view taken on the line in FIG. The longitudinal cross-sectional view which shows the range hood fan of the main exhaust mode state. The longitudinal cross-sectional view which shows the range hood fan of a top exhaust mode state. The longitudinal cross-sectional view which shows the range hood fan of an upper rapid exhaust mode state.

Explanation of symbols

A: Range hood fan B ... Ceiling surface 1 ... Hood body 1b ... Suction port 2 ... Main exhaust fan 2c ... Guide piece 3 ... Upper exhaust fan 4 ... Exhaust Duct 5 ... 1st damper 5a ... Intermediate closed position 5b ... Lower closed position 6 ... 2nd damper 6a ... Upper closed position 6b ... Main exhaust closed position 6c ... Intermediate position 7 ... Upper suction port 8 ... Skirt member 9 ... Communication path 10 ... Control unit

Claims (2)

The hood main body is provided with a hood body whose upper part is located near the ceiling of the room and a suction port is provided at the lower part. An upper exhaust fan is installed in the hood body, and the exhaust air drawn from the suction port at the lower part of the hood body is exhausted from the main exhaust fan to the outside through the exhaust duct. The upper suction port is opened at the upper part of the hood body. The exhaust port of the upper exhaust fan is connected to the exhaust duct, and the exhaust fan is connected to the exhaust duct via a communication path formed in the hood body. A first damper is provided in an intermediate portion of the road, and the first damper closes the middle of the communication path to connect the hood main body suction port and the main exhaust fan, It is configured to selectively move between the lower closed position where the space between the air fan and the hood main body inlet is closed and the middle of the communication path is opened, and a second damper is provided in the middle of the exhaust duct The second damper has an upper closed position where the exhaust port of the upper exhaust fan is closed to open the exhaust duct, and a main exhaust closed position where the exhaust port of the main exhaust fan is closed and the exhaust port of the upper exhaust fan is opened. And an intermediate position between the two closed positions and the exhaust ports of both the exhaust fans being opened together, and only the main exhaust fan is operated, and the first damper is disposed in the middle Main exhaust mode to move the second damper to the closed position and the upper damper position, and only the upper exhaust fan to operate, move the first damper to the intermediate closed position and the second damper to the main exhaust closed position Control mechanism for selectively controlling the upper exhaust mode to be operated and the upper rapid exhaust mode in which both the main exhaust fan and the upper exhaust fan are operated to move the first damper to the lower closed position and the second damper to the intermediate position Range hood fan equipped with . The range hood fan according to claim 1, wherein a skirt member for introducing exhaust gas is provided on an upper peripheral surface of the hood main body so as to be inclined from the ceiling surface toward the upper suction port .

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