Ventilating fan

Abstract

To obtain a ventilating fan in which piping work of an air supply duct to air supply connection ports can be easily performed even if a positional shift between the air supply duct and an air supply chamber occurs.SOLUTION: A range 1 comprises: a case 3 provided with a suction port 6 for sucking cooking exhaust, and a discharge port 7 for discharging the cooking exhaust; a rectangular parallelepiped air supply chamber 12 fixed to an upper part of a top surface of the case 3, in which an air supply port 10 is formed in a front surface, and in which duct connection ports 13 to which an air supply duct 11 is connected are formed in a plurality of surfaces; and an attachment 14 attached to the duct connection ports 13, and for connecting the air supply duct 11 and the air supply chamber 12. In the air supply chamber 12, a fixed position with respect to the case 3 can be adjusted in the left-right direction. In the attachment 14, a fixed position with respect to the air supply chamber 12 can be adjusted in the up-down direction and the left-right direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to an exhaust fan that exhausts cooking exhaust air outdoors. [Background technology]

[0002] When cooking with cooking utensils, cooking exhaust gas containing oily smoke, steam, odors, hot air, etc. For this reason, a ventilation fan is used to exhaust the cooking exhaust gas outdoors.

[0003] Patent Document 1 discloses a range hood, which is a simultaneous supply and exhaust type ventilation fan that has an air blower box to which an exhaust duct is connected and an air supply chamber to which an air supply duct for introducing outside air connected, arranged side by side. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-93154 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the ventilation fan disclosed in Patent Document 1 has a problem in that misalignment of the air intake duct can make it difficult to piping the air intake duct to the air intake connection port of the air intake chamber.

[0006] The present disclosure has been made in consideration of the above, and aims to provide a ventilation fan that allows easy piping of the air intake duct to the air intake connection port even if there is a misalignment between the air intake duct and the air intake chamber. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems and achieve the object, the present disclosure provides a ventilation fan comprising: a housing provided with an inlet for drawing in cooking exhaust air and an outlet for blowing out cooking exhaust air, a rectangular parallelepiped air supply chamber fixed to the upper top surface of the housing, with an air supply port formed on the front and air supply duct connection ports to which an air supply duct is connected formed on multiple sides, and an attachment attached to the air supply duct connection port to connect the air supply duct to the air supply chamber. The fixed position of the air supply chamber relative to the housing can be adjusted left and right, and the fixed position of the attachment relative to the air supply chamber can be adjusted up and down and left and right. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to obtain a ventilation fan that allows easy piping of the air intake duct to the air intake connection port even if there is a misalignment between the air intake duct and the air intake chamber. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a microwave oven according to a first embodiment; [Figure 2] An enlarged side view of the range according to the first embodiment [Figure 3] A side view of the range according to the first embodiment. [Figure 4] FIG. 10 is a diagram showing the dimensional relationship of the protruding portion of the microwave oven according to the first embodiment. [Figure 5] 1 is a perspective view of the rear side of the microwave oven according to the first embodiment; [Figure 6] FIG. 1 is a diagram showing a method for attaching an attachment to a microwave oven according to the first embodiment; [Figure 7] FIG. 1 is a perspective view of an air supply chamber of a microwave oven according to a first embodiment; [Figure 8] FIG. 1 is a diagram showing a method for fixing an attachment to a microwave oven according to the first embodiment; [Figure 9] FIG. 10 is a perspective view of an air supply chamber of a microwave oven according to a second embodiment. [Figure 10] FIG. 10 is a diagram showing a method for attaching the air supply chamber of the range according to the second embodiment. [Figure 11]FIG. 10 is a diagram showing a method for attaching an attachment to a microwave oven according to a second embodiment. [Figure 12] Top view of the microwave oven according to the second embodiment [Figure 13] A side view of a microwave oven according to a third embodiment. [Figure 14] FIG. 10 is an enlarged side view of a connection portion between the housing of the range and the air supply chamber according to the third embodiment. [Figure 15] FIG. 10 is an enlarged cross-sectional view of a connection between the housing of the range and the air supply chamber according to the third embodiment. [Figure 16] FIG. 10 is a cross-sectional view showing a state in which a support screw is attached to the air supply chamber of the range according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] The following describes in detail a ventilation fan according to an embodiment with reference to the drawings. Note that the scale of each component shown in the following drawings is an example, and the dimensional ratios of each component may differ from the actual ratios. The same applies between the drawings.

[0011] Embodiment 1 FIG. 1 is a perspective view of a range according to embodiment 1. FIG. 1 shows a range 1, which is a ventilation fan according to embodiment 1, as viewed obliquely from below. FIG. 2 is an enlarged side view of the range according to embodiment 1. FIG. 2 shows the range 1 installed on a wall 2. FIG. 3 is a side view of the range according to embodiment 1.

[0012] The microwave oven 1 has a rectangular parallelepiped housing 3 that forms the outer shell of the microwave oven 1. The housing 3 has a housing main body 4 that is a rectangular parallelepiped box with an open front, and a front panel 5 that covers the front of the housing main body 4.

[0013] The width direction of the microwave oven 1 corresponds to the width direction of the housing 3, and corresponds to the X-axis direction in Figure 1. The width direction of the microwave oven 1 can be said to be the left-right direction. The depth direction of the microwave oven 1 corresponds to the depth direction of the housing 3, and corresponds to the Y-axis direction in Figure 1. The depth direction of the microwave oven 1 can be said to be the front-to-back direction of the microwave oven 1 or the front-to-back direction of the housing 3. The height direction of the microwave oven 1 corresponds to the height direction of the housing 3, and corresponds to the Z-axis direction in Figure 1. When the microwave oven 1 is installed on the wall 2, the height direction of the microwave oven 1 is the up-down direction, a direction parallel to the vertical direction. Furthermore, the side of the microwave oven 1 where the front panel 5 is located in the depth direction is the front side, and the side opposite the side where the front panel 5 is located in the depth direction is the rear side. The left-to-right direction is the left-to-right direction when the microwave oven 1 is viewed from the front side.

[0014] The housing 3 has an intake port 6 formed on its underside, which is an opening for taking in indoor air. A hood 6a surrounding the intake port 6 is attached to the bottom of the housing 3. The housing 3 also has an outlet port 7 formed on its top, which is an opening for blowing air from inside the housing 3 to the outside. A blower 9 is installed inside the housing 3. The blower 9 generates an airflow that enters the housing 3 through the intake port 6 and exits the housing 3 through the outlet port 7. The airflow generated by the blower 9 draws air into the housing 3 through the intake port 6 and blows it out through the outlet port 7. The intake port 6 and the outlet port 7 are positioned so that cooking exhaust air 51, including oily smoke, steam, odors, and hot air rising from cooking appliances 50 located below the range 1, can be sucked in through the intake port 6, and efficiently sent from the outlet port 7 to an exhaust duct 8 installed above the ceiling. Thus, the range 1 is installed on the wall 2 and serves as a ventilation fan that exhausts cooking exhaust air 51 generated from the cooking appliances 50 during cooking to the outside, thereby maintaining a comfortable indoor air environment.

[0015] The front panel 5 is a lid that covers the open front side of the housing body 4, and is one of the components that make up the housing 3. In other words, the front of the microwave 1 and the front of the housing 3 are made up of the front panel 5. By removing the front panel 5, it becomes possible to access each component housed inside the housing 3, and the user of the microwave 1 can perform maintenance work on each component housed inside the housing 3.

[0016] The blower 9 is housed in the housing 3 and is attached to the back surface of the housing 3 that comes into contact with the wall 2 when the microwave oven 1 is installed on the wall 2. Because the blower 9 is heavy compared to other components, attaching the blower 9 to the back surface of the housing 3 reduces the torque that is applied to the part of the microwave oven 1 that is fixed to the wall 2 due to its weight when the microwave oven 1 is fixed to the wall 2. Because the torque that is applied to the part that is fixed to the wall 2 is small, in other words, because the load on the part that is fixed to the wall 2 is small, the microwave oven 1 can be firmly installed on the wall 2, improving the reliability of the installation and minimizing the vibrations that occur during operation of the microwave oven 1.

[0017] A centrifugal blower is used for blower 9. Blower 9, which is a centrifugal blower, has a rotation axis extending along the Y-axis direction, which is the front-to-rear direction, and is arranged so that the motor side is on the rear side and air is taken in from the front and exhausted to the top side in the radial direction. By using a centrifugal blower for blower 9, the motor that rotates the fan can be installed close to the rear side of housing 3.

[0018] Since the blower 9 is stored in the housing 3 while attached to the back of the housing 3, it is effective to position the air outlet 7 on the back side of the top surface of the housing 3 in order to improve the air blowing efficiency.

[0019] An air supply chamber 12, which is an air supply port member having an air supply port 10 formed therein through which supply air is blown into the room, is fixed to the top surface of the housing 3. In the microwave oven 1, the air supply port 10 is provided on the front surface of the air supply chamber 12.

[0020] Air supply chamber 12 is shaped like a rectangular parallelepiped and is placed on the top surface of housing main body 4. Specifically, the lower surface of the rear side of air supply chamber 12 is placed on the top surface of housing main body 4. The front surface of air supply chamber 12 protrudes further forward than front panel 5 of housing 3.

[0021] The large exhaust air volume of range 1 can sometimes create negative pressure in the room, but to eliminate the negative pressure in the room, it is necessary to take in air from outside and supply it into the room. If air intake 10 is located far from range 1, an air current may be generated from air intake 10 to range 1, resulting in the exhaust of a large amount of air-conditioning heat, or the air current from air intake 10 to range 1 may hit people in the room, making them uncomfortable. For this reason, it is preferable to locate air intake 10 as close to range 1 as possible. Alternatively, range 1 itself may have an air intake function.

[0022] When adding an air intake function to microwave 1, if the size of microwave 1 increases due to the addition of the air intake function, installation locations will be limited, so it is necessary to avoid increasing the size of microwave 1. For this reason, by locating air intake chamber 12, which is an air intake port member, on the front side of the top surface of housing 3, it is possible to add an air intake function to microwave 1 without increasing the size of microwave 1.

[0023] Air supplied to the room is introduced from outdoors to air intake 10 of range 1 via air intake duct 11, which is piped above the ceiling, so the length of air intake duct 11 can be shortened by locating air intake chamber 12, which is an air intake member, above housing 3. Also, because air outlet 7 is provided on the back side of the top surface of housing 3, the size of range 1 can be reduced by fixing air intake chamber 12, which is an air intake member, to the front side of the top surface of housing 3.

[0024] Furthermore, by using air intake chamber 12 with duct connection ports 13 in multiple directions as the air intake port member, it is possible to add an air intake function to range 1 while improving the ease of piping connection work without increasing the required piping space. Duct connection port 13 is covered by cover 13a. By removing cover 13a, duct connection port 13 is exposed and it becomes possible to connect air intake duct 11. Air intake duct 11 is connected to any of the top, left, right, and back surfaces of air intake chamber 12.

[0025] The piping direction of the air intake duct 11 relative to the range 1 is either rear, left, or right, but if the range 1 is far from the attic, it can also be upward toward the attic. The piping direction of the air intake duct 11 is selected in a direction different from the direction of the air outlet 7, taking into consideration that it is desirable for the supplied outside air to be clean, or by taking into account the conditions of adjacent buildings in the house, etc. Also, the shorter the piping length of the air intake duct 11, the easier it is for the supply air to flow and the less likely it is for negative pressure to develop indoors, so the piping direction of the air intake duct 11 can be selected in a direction that allows the piping length to be short.

[0026] 4 is a diagram showing the dimensional relationship of the protruding parts of the microwave oven according to embodiment 1. The length of the air supply chamber 12 in the front-to-rear direction is defined as WY0. Furthermore, the length of the air supply chamber protruding part 41, which is the part of the air supply chamber 12 that protrudes forward beyond the front panel 5 of the housing 3, in the front-to-rear direction is defined as WY1. Furthermore, the length of the air supply chamber overlapping part 42, which is the part of the air supply chamber 12 that overlaps with the housing 3 in the front-to-rear direction, is defined as WY2.

[0027] Here, the sum of the length WY1 of the air supply chamber protrusion 41 and the length WY2 of the air supply chamber overlapping portion 42 is the length WY0 in the front-to-rear direction of the air supply chamber 12. In other words, WY0 = WY1 + WY2.

[0028] The air supply chamber protrusion 41 is longer than the air supply chamber overlapping portion 42. That is, WY1>WY2.

[0029] This configuration allows for ample space to install exhaust duct 8 on the top surface of housing 3. As a result, it is possible to provide exhaust outlet 7 and intake port 10 for intake air, thereby adding an air supply function to range 1, without increasing the product size of range 1.

[0030] Figure 5 is a perspective view of the rear side of the range according to embodiment 1. Air supply chamber 12 has duct connection ports 13 formed on the top, left side, right side, and rear. By providing air supply port 10 in air supply chamber 12 which has duct connection ports 13 in multiple directions, air supply duct 11 and air supply port 10 can be connected with simple piping with few bends regardless of the piping direction of air supply duct 11. This allows range 1 to be equipped with an air supply function while improving the ease of piping connection without increasing the required piping space.

[0031] The connection between air supply chamber 12 and air supply duct 11 is made via attachment 14, which has at one end a duct-shaped portion with approximately the same diameter as air supply duct 11 and a duct shape that fits inside air supply duct 11, and at the other end an attachment shape that can be attached to the opening of duct connection port 13. Attachment 14 can be attached to air supply chamber 12 from either the outside or the inside, but in embodiment 1 it is attached to air supply chamber 12 from the inside.

[0032] When connecting the air supply chamber 12 and the air supply duct 11, it is necessary to provide a certain amount of overlap between the duct-shaped portion of the attachment 14 and the air supply duct 11 to prevent air leakage and to secure the connection. Therefore, the duct-shaped portion of the attachment 14 needs to be slid into the air supply duct 11. However, when attaching the attachment 14 to the air supply chamber 12 in advance, space is required to slide the air supply chamber 12 together with the attachment 14 on the opposite side of the air supply duct 11. In particular, when connecting the air supply duct 11 with its piping direction upward to the air supply chamber 12, the housing 3 is located below the air supply chamber 12, so space cannot be secured to slide the air supply chamber 12 downward. Therefore, it is necessary to insert the attachment 14 into the air supply duct 11 and temporarily secure it with tape or the like, and then position the air supply chamber 12 between the housing 3 and the attachment 14 before fastening the attachment 14 to the air supply chamber 12.

[0033] Figure 6 is a diagram showing how to attach an attachment to the microwave oven according to embodiment 1. Figure 6 shows attachment 14 as viewed from the right. If attachment 14 can be inserted from inside air supply chamber 12 and secured to air supply chamber 12, there is no need to temporarily secure attachment 14 to air supply duct 11 with tape or the like, making duct connection easy. In this way, if attachment 14 can be attached to microwave oven 1 from inside air supply chamber 12, connecting air supply duct 11 is easy and an air supply function can be added.

[0034] Figure 7 is a perspective view of the air supply chamber of the range according to embodiment 1. The front of the air supply chamber 12 is a removable panel 18 that opens up the front of the air supply chamber 12 so that an attachment 14 can be inserted from inside the air supply chamber 12. The panel 18 is fixed to the chamber body 12a with fixing screws 18a, and the panel 18 can be removed from the chamber body 12a by removing the fixing screws 18a from the chamber body 12a. By removing the panel 18 from the chamber body 12a, the attachment 14 can be inserted into the air supply chamber 12 from the front.

[0035] 8 is a diagram showing a method for fastening an attachment to the microwave oven according to embodiment 1. After sliding attachment 14 toward air supply duct 11, attachment 14 can be fastened to air supply chamber 12 using fixing screw 19, which is a thumbscrew or thumb screw, so that a tool such as a screwdriver cannot be used. Therefore, attachment 14 can be fastened to air supply chamber 12 even if a tool such as a screwdriver cannot be inserted into air supply chamber 12.

[0036] The duct connection port 13 of the air supply chamber 12 may be formed by half-punching, and once the duct connection port 13 to be used is selected, the half-punched portion may be punched out to form an opening to which the air supply duct 11 is connected. This reduces material costs compared to an air supply chamber 12 having a structure in which a duct connection port 13 that has been punched out as an opening in advance is covered with a cover 13a. Furthermore, the time required to open the duct connection port 13 can be shortened compared to an air supply chamber 12 having a structure in which a duct connection port 13 that has been punched out as an opening in advance is covered with a cover 13a.

[0037] Embodiment 2 FIG. 9 is a perspective view of the air supply chamber of the range pertaining to embodiment 2. FIG. 10 is a diagram showing how to attach the air supply chamber of the range pertaining to embodiment 2. FIGS. 9 and 10 show the state in which panel 18 has been removed from chamber main body 12a. Also, in FIG. 9, cover 13a that covers duct connection port 13 is not shown. Air supply duct 11 connecting the outdoors to air supply chamber 12 can be installed more easily if misalignment that occurs between attachment 14 and duct 11 during installation can be eliminated. Range 1 pertaining to embodiment 2 differs from range 1 pertaining to embodiment 1 in that attachment 14 is attached to air supply chamber 12 from the outside.

[0038] In the microwave oven 1 according to the second embodiment, the air supply chamber 12 has a horizontally elongated hole 20 formed in its bottom surface. The housing body 4 also has a female threaded hole 21 formed therein for an air supply chamber fixing screw for tightening. By threading an air supply chamber fixing screw 23 through the horizontally elongated hole 20 of the air supply chamber 12 and into the female threaded hole 21 to fix the air supply chamber 12, the position of the air supply chamber 12 can be adjusted by sliding it left and right.

[0039] 11 is a diagram showing a method for attaching an attachment to a microwave oven according to embodiment 2. Fastening hole 26 of attachment 14 is larger than the diameter of screw 27, allowing for fine adjustment of the position of attachment 14 forward, backward, left, and right. When attaching attachment 14 to air supply chamber 12, screw 27 is fastened via washer 25, making it possible to secure attachment 14 with screw 27 even if the diameter of fastening hole 26 is larger than the diameter of screw 27.

[0040] Figure 12 is a top view of the microwave oven according to embodiment 2. Figure 12 shows the microwave oven 1 as seen from above, with the lower side of the page being the front side and the upper side being the rear side. Figure 12 shows an example in which the exhaust duct 8 and the intake duct 11 are connected from the rear side.

[0041] Due to regulations regarding the distance from combustible materials to ensure fire safety, exhaust duct 8 is sometimes wrapped in 50 mm thick insulation material 15. Similarly, air intake duct 11 is sometimes wrapped in insulation material 15 of the same thickness as that wrapped around exhaust duct 8 to prevent condensation in winter. Therefore, if there is a 100 mm gap between exhaust duct 8 and air intake duct 11, which is the equivalent of two layers of 50 mm thick insulation material 15, exhaust duct 8 and air intake duct 11 can each be wrapped in 50 mm thick insulation material 15. Since kitchen range ducts typically use cylinders with a diameter of 150 mm, if the center-to-center distance between exhaust duct 8 and air intake duct 11 is 250 mm or more, exhaust duct 8 and air intake duct 11 can each be wrapped in 50 mm thick insulation material 15.

[0042] Considering the thickness of the insulation material 15, if the position of the duct connection port 13 to which the air intake duct 11 is connected can be adjusted to a position 250 mm away from the outlet 7 to which the exhaust duct 8 is connected, the air intake duct 11 and the exhaust duct 8 will not interfere with each other even when the insulation material 15 is wrapped around them, making piping installation easier.

[0043] Embodiment 3 FIG. 13 is a side view of a microwave oven according to embodiment 3. FIG. 14 is an enlarged side view of the connection portion between the housing and air supply chamber of the microwave oven according to embodiment 3. FIG. 15 is an enlarged cross-sectional view of the connection portion between the housing and air supply chamber of the microwave oven according to embodiment 3. FIG. 16 is a cross-sectional view showing a support screw attached to the air supply chamber of the microwave oven according to embodiment 3. In microwave oven 1, which is a ventilation fan according to embodiment 3, a step 28 is provided on the underside of air supply chamber 12, which takes in air from outdoors, and a notch 22 is formed in the lower part of air supply chamber 12 forward of step 28 to avoid interference with front panel 5. A removable support screw 17 is attached to the underside of air supply chamber 12 in a portion forward of step 28. This allows microwave oven 1 according to embodiment 3 to be easily maintained while also providing an air supply function.

[0044] Microwave oven 1 requires maintenance of the motor of blower 9, etc. If front panel 5 on the front of housing 3 is removable, removing front panel 5 opens the front of housing 3, making it easier to access maintenance parts and improving maintenance workability.

[0045] The housing body 4 has a rectangular parallelepiped shape with an open front. The front panel 5 covers the front opening of the housing body 4. Here, the housing 3 serves as a chamber for generating an intake airflow by the blower 9, and therefore the front panel 5 has a wrap portion 16 that overlaps with the outer periphery of the front side of the housing body 4 to prevent air leakage from between the front panel 5 and the housing body 4 and ensure airtightness.

[0046] As mentioned above, the air supply chamber 12 can be placed on the front side of the top surface of the range 1 to prevent the product size of the range 1 from increasing, so the lap portion 16 of the front panel 5 and the air supply chamber 12 are in the same position in the Y-axis direction, which is the front-to-back direction.

[0047] Therefore, the air supply chamber 12 is formed with a notch 22 to avoid interference with the front panel 5, and is shaped so as not to interfere with the lap portion 16 of the front panel 5.

[0048] Air supply chamber 12 tilts forward because only a portion near the rear is in contact with the top surface of housing 3. If air supply chamber 12 tilts forward, it may be necessary to correct the tilt when connecting air supply duct 11, for example, and may cause vibration noise at the contact surface between air supply chamber 12 and housing 3 during use. To prevent this, removable support screw 17 is installed on the underside of air supply chamber 12, in front of step 28, to prevent air supply chamber 12 from tilting forward.

[0049] The support screws 17 are screwed into the female support screw holes 24 from inside the air supply chamber 12, and are long enough to complete the screw fastening when the tips of the support screws 17 touch the housing 3. During maintenance of the microwave oven 1, the support screws 17 can be removed to ensure space between the housing 3 and the air supply chamber 12 for removing the front panel 5. Furthermore, by leaving the support screws 17 attached at times other than during maintenance, the air supply chamber 12 can be supported to prevent it from tilting forward.

[0050] The support screw 17 is tightened or loosened by working downward from the air supply chamber 12, so the work must be done from inside the air supply chamber 12. For this reason, the front of the air supply chamber 12 is formed by a removable panel 18, and the front of the air supply chamber 12 can be opened by removing the panel 18. Because the panel 18 is removable, the work of tightening or loosening the support screw 17 is easy, improving the maintainability of the range 1. Furthermore, the support screw 17 is a thumbscrew or thumbscrew so that it can be fixed without using a tool such as a screwdriver, even if a tool such as a screwdriver cannot fit inside the air supply chamber 12.

[0051] Air supply chamber 12 is rectangular and is placed on the top surface of housing body 4. The underside of air supply chamber 12 is formed with two surfaces parallel to the top surface of housing body 4, with the rear side of step 28 being the lower level and the front side of step 28 being the upper level. Rear side underside 32 of air supply chamber 12 is placed on the top surface of housing body 4. Front side underside 33 of air supply chamber 12 is positioned offset upward and inside air supply chamber 12 relative to rear side underside 32 so as not to come into contact with the top surface of front panel 5.

[0052] With this configuration, the front lower surface 33 of the air supply chamber 12 does not come into contact with the top surface of the front panel 5, so the front panel 5 can be easily removed from the housing main body 4.

[0053] As shown in Figure 16, a threaded hole 31 is provided on the inside of the front underside 33 of the air supply chamber 12. A support screw 17 is screwed into a female threaded hole 24 for a support screw formed in the threaded hole 31 from the inside of the air supply chamber 12, and the support screw 17 is supported by abutting against the top surface of the housing main body 4 or the top surface of the front panel 5. The support position is preferably as close to the front as possible, so a position where the support screw 17 abuts against the top surface of the front panel 5 is desirable.

[0054] When the front panel 5 can be easily removed from the housing body 4, the support screws 17 are removed first, and then the front panel 5 is removed.

[0055] 16, the length of the step overlap portion 44, which is the overlapping portion in the front-to-rear direction between the front-side lower surface 33 of the air supply chamber 12 and the housing main body 4, is designated as WY4. The length in the front-to-rear direction of the rear-side lower surface 32 of the air supply chamber 12 is designated as WY3. The distance in the front-to-rear direction from the front end of the rear-side lower surface 32 to the support screw 17 is designated as WY5.

[0056] Here, the sum of the length of the step overlapping portion 44 and the length of the rear side lower surface 32 is the length of the air supply chamber overlapping portion 42. In other words, WY2 = WY4 + WY3.

[0057] Also, the step overlap portion 44 is shorter than the rear lower surface 32. That is, WY4 <WY3である。

[0058] Furthermore, the distance WY5 in the front-rear direction from the front end of the rear lower surface 32 to the support screw 17 is longer than half the length WY4 of the stepped overlap portion 44. That is, WY5>WY4×½.

[0059] By configuring it in this manner, a cutout portion 22 is formed in the air supply chamber 12 so that the air supply chamber 12 does not interfere with the front panel 5 that forms the front of the housing 3 of the range 1, and the air supply chamber 12 can be prevented from tilting forward.

[0060] The configurations shown in the above embodiments are merely examples of the content, and may be combined with other known technologies, and parts of the configurations may be omitted or modified as long as they do not deviate from the gist of the invention. [Explanation of symbols]

[0061] 1 Range, 2 Wall, 3 Housing, 4 Housing body, 5 Front panel, 6 Intake port, 6a Hood, 7 Outlet, 8 Exhaust duct, 9 Blower, 10 Air intake port, 11 Air intake duct, 12 Air intake chamber, 12a Chamber body, 13 Duct connection port, 13a Cover, 14 Attachment, 15 Heat insulating material, 16 Wrap portion, 17 Support screw, 18 Panel, 18a, 19 Fixing screw, 20 Oblong hole, 21 Female screw hole, 22 Notch, 23 Air intake chamber fixing screw, 24 Female screw hole for support screw, 25 Washer, 26 Fastening hole, 27 Screw, 28 Step, 31 Screw hole portion, 32 Lower surface of rear side, 33 Lower surface of front side, 41 Air intake chamber protrusion portion, 42 Air intake chamber overlap portion, 44 Step overlap, 50 cooking equipment, 51 cooking exhaust.

Claims

1. a housing provided with an intake port for drawing in cooking exhaust air and an outlet port for blowing out the cooking exhaust air; a rectangular parallelepiped air intake chamber fixed to an upper portion of the top surface of the housing, with an air intake port formed on the front surface and air intake duct connection ports formed on multiple surfaces to which air intake ducts are connected; an attachment attached to the air supply duct connection port to connect the air supply duct and the air supply chamber; a fixed position of the air supply chamber relative to the housing can be adjusted in the left-right direction; A ventilation fan characterized in that the attachment's fixed position relative to the air supply chamber can be adjusted in the vertical and horizontal directions.

2. A horizontally elongated hole is formed in the bottom surface of the air supply chamber, The ventilation fan according to claim 1 , wherein the air supply chamber is fixed to the housing by a screw that passes through the oblong hole.

3. the housing has an exhaust duct connection port to which an exhaust duct is connected, 3. The ventilation fan of claim 1, wherein the fixed position of the air supply chamber relative to the housing is adjustable so that the distance between the air supply duct connection port and the exhaust duct connection port in the left-right direction is 250 mm or more.

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