JPH04110331U - range hood fan - Google Patents

Abstract

(57) [Summary] [Purpose] A ventilation blocking device is provided in the hood main body, and the ventilation blocking device quickly shuts off the device.
To prevent the spread of fire to a blower, etc. without increasing the force of the flame. [Configuration] A thermal fuse 21 and a thermal fuse 2 are installed on both left and right sides of the hood body 1 in which the blower 2 is installed.
A ventilation blocking device 23 consisting of a blocking plate 18 suspended through a block plate 1 is provided. When the temperature of the intake air passing through the ventilation passage 17 becomes abnormally high, the thermal fuse 21 melts and the blocking plate 18 falls, causing the horizontal portion 18a of the blocking plate 18 to fall to the stepped portion 11b.
The air passage 17 is blocked by the blocking plate 18.

Description

[Detailed explanation of the idea]

0001 [Purpose of invention]

0002

[Industrial application field]

The present invention relates to a range hood fan with a fire damper function.

0003

[Conventional technology]

As this type of range hood fan, for example, Japanese Utility Model Application Publication No. 60-187842 What is shown in the report is known. This one is a hood book with a blower inside An exhaust port body connected to the exhaust duct is provided on the upper part of the body, and a heated The structure is equipped with a ventilation cutoff device that has a temperature fuse and a damper plate. When the air around the fuse reaches a specified temperature or higher, the thermal fuse will melt and the damper plate will open. Rotates, and this damper plate blocks the ventilation path between the exhaust port body and the exhaust duct. It looks like this.

0004

[Problem that the idea aims to solve]

By the way, in the above configuration, for example, the lever installed below the hood body If a fire breaks out in the oven, there should be a flap between the oven side and the ventilation cutoff device. Because the main body of the thermal fuse is interposed, heat is difficult to transfer to the thermal fuse, and a ventilation cutoff device is used. The disadvantage is that the shutoff operation is delayed. In addition, in such cases, the blower When the hood is running, the flame from the range is drawn into the hood itself. There is also a risk that the flames will grow in strength. Also, in this case, oil from the blower inside the hood body, etc. The fire spreads to the blower, etc. due to the ignition.

[0005] The present invention was developed in view of the above circumstances, and its purpose is to block the ventilation cutoff device. Not only can the cutting action be performed quickly, but it also does not increase the strength of the flame. A microwave oven that can prevent the spread of fire to the blower, etc., and also prevent the spread of flames. There is something to offer food fans.

[0006] [Structure of the idea]

[0007]

[Means to solve the problem]

The present invention allows indoor air to enter the inside of the hood body, which has an opening at the bottom, through the opening at the bottom. Air blower that sucks in air through a connected intake port and exhausts the sucked air to the outside. In the range hood fan equipped with a When the intake air reaches a predetermined temperature or higher, the air passage between the intake port and the blower opens. It is characterized by the provision of a ventilation blocking device that blocks the airflow.

[0008] Then, when the ventilation cutoff device is cut off, it protrudes downward from the bottom surface of the hood body. It is preferable to provide a protruding member.

[0009]

[Effect]

In the event of a fire occurring indoors, the intake air that passes through the intake port of the hood body When the temperature of road is blocked.

0010 In this case, the ventilation cutoff device is located inside the hood body, and the air intake by the blower is It operates according to the temperature of the air, so if a fire breaks out indoors, The heat is easily transferred to the ventilation cutoff device, so the ventilation cutoff device can shut off quickly. Become so. When the ventilation cutoff device shuts off, the ventilation on the suction side of the blower is shut off. Since the air passage is blocked and the blowing effect from the blower is virtually eliminated, the There is no possibility that the flame from the other side will be drawn into the inside of the hood body.

[0011] In addition, the ventilation cutoff device has a structure that protrudes downward from the bottom surface of the hood body when the cutoff operation is performed. If a protruding member is provided, the protruding member will cause the flame below the hood body to spread laterally. It can prevent the spread to.

0012

【Example】

An embodiment of the present invention will be described below with reference to the drawings. First, Figure 1 and In FIG. 2 and FIG. It is installed so that the back surface 1a is in contact with the room wall. this hood A blower 2 is disposed in the upper center of the main body 1.

[0013] The blower 2 includes a motor 4 having a rotating shaft 3 protruding to both left and right sides, and the rotating shaft 3. It has two fans 5, 5 attached to both the left and right sides, and intake ports 6, 6 on both the left and right sides. At the same time, a discharge port 8 communicating with an opening 7 formed on the top surface of the hood main body 1 is provided at the top. a fan casing 9 provided to cover the motor 4 and the fans 5, 5; It is composed of.

[0014] The upper surface of the hood main body 1 is connected in communication with the discharge port 8 of the fan casing 9. A member 10 is provided, and this connecting member 10 is connected to a duct (not shown). It has become.

[0015] In addition, below the blower 2 inside the hood body 1, there is a hood body 1 on both left and right sides. A frame body having partition walls 11a, 11a facing the inner surface 1b with a predetermined gap therebetween. 11, 11 are provided, and a central portion is designed to cover the blower 2 from below. A cutting plate 12 is provided. These frames 11, 11, partition plate 12 and hood The main body 1 forms a relatively large storage space 13 at the lower part of the hood main body 1. There is.

[0016] The partition wall 11a of each frame 11 communicates with the lower opening 14 of the hood body 1. An intake port 15 is formed, and a grease filter 16 is removable at this intake port 15 portion. is installed on. And between each partition wall 11a and the inner surface 1b of the hood body 1 A ventilation passage 17 extending vertically is formed in the The air intake port 15 and the air intake port 6 of the blower 2 are communicated with each other.

[0017] Thus, the distance between each partition wall 11a and the inner surface 1b of the hood body 1 facing thereto is A closing plate 18 having a horizontal portion 18a at the top is arranged between them. Each occlusion plate 1 8 is a mounting part 19 that this has and a mounting part provided on the stepped part 11b on the upper part of the frame 11. It is suspended via a thermal fuse 21 provided between the attaching part 20 and the lower end. is inserted into the slit 22 formed between the hood body 1 and the frame 11 It becomes.

[0018] Here, each blockage plate 18 and the thermal fuse 21 constitute a ventilation cutoff device 23. ing. Further, each blocking plate 18 is operated by a ventilation blocking device 23 as described later. The lower part 18b protrudes downward from the lower surface of the hood main body 1 when The protruding part also serves as a protruding member.

[0019] Next, the operation of the above configuration will be explained. For example, in the microwave below the hood body 1. For example, suppose you are cooking tempura. In this case, the blower 2 of the range hood fan is in operation, and the oil smoke generated in the range is caused by the rising air and blower 2. Due to the air blowing action, the hood is stored in the storage space 13 from the lower opening 14 of the hood main body 1. After that, it passes through the grease filter 16, the intake port 15, and the air passage 17 in this order. After that, it is sucked into the housing 9 and then passed through the connecting member 10 and a duct (not shown). It is discharged to the outside.

[0020] Now, suppose a fire occurs where the oil in the pot in the microwave catches fire. The temperature of the intake air drawn into the hood body 1 becomes abnormally high and When the temperature of the intake air reaches a predetermined temperature or higher, each thermal fuse 21 melts. vinegar Then, each closing plate 18 suspended via the thermal fuse 21 is suspended by its own weight. The blocker plate 18 falls along the inner surface 1b of the main body 1, and each blockage plate 18 falls on the horizontal part as shown in FIG. 18a is caught and stopped by the stepped portion 11b of the frame 11, so that the intake port 15 and Each ventilation path 17 between the air blower 2 and the air blower 2 is blocked by each closing plate 18 . in this way Then, the ventilation blocking device 23 performs the blocking operation. At this time, the lower part 1 of each closing plate 18 8b protrudes downward from the lower surface of the hood body 1 on both left and right sides of the hood body 1. Become so.

[0021] According to the embodiment described above, the thermal fuse 21 of the ventilation cutoff device 23 is connected to the hood main body. This is because it exists inside the body 1 and is located in the area through which the air inhaled by the blower 2 passes. , when a fire occurs indoors, the thermal fuse 21 can quickly detect the heat; Therefore, the ventilation cutoff device 23 can quickly perform the cutoff operation. and ventilation barrier When the switch 23 operates to shut off, the air passage 17 on the suction side of the blower 2 is shut off, and the blower 2 Since the air blowing effect is virtually eliminated, the flame below the hood body 1 is The flame will not be drawn inward, and the force of the flame will be promoted. It can be prevented. As a result, oil adhering to the blower 2, etc. inside the hood body 1 Fires can also be prevented as much as possible.

[0022] Further, when the ventilation blocking device 23 performs the blocking operation, the lower part 1 of each blocking plate 18 on both the left and right sides 8b protrudes downward from the bottom surface of the hood main body 1, so each of these blocking plates The lower part 18b of 18 prevents the flame below the hood body 1 from spreading laterally. This also prevents the spread of fire to hanging cabinets installed next to the range hood fan. Ru.

[0023] Furthermore, according to the above embodiment, the intake ports 15 are provided on both left and right sides of the lower portion inside the hood body 1. The storage space 13 in the lower part of the hood main body 1 is formed relatively large and deep. Because of this, even if a large amount of oil smoke is generated from the microwave side at once, the oil smoke can be contained in the air. It can be accommodated as much as possible within the space 13, and leakage of oil smoke from the hood body 1 to the side is minimized. It has the advantage of being able to reduce

[0024] In addition, in the above embodiment, the ventilation is blocked by falling the blocking plate 18 of the ventilation blocking device 23. Although the configuration is such that the air passage 17 is blocked, for example, by rotating the blocking plate 18, the air passage 17 is closed. It is also possible to have a configuration that blocks the Also, it can be used as a heat sensing element of the ventilation cutoff device 23. Although the thermal fuse 21 was illustrated in the above, a shape memory alloy may be used instead of the thermal fuse. You can also do that.

[0025]

[Effect of the idea]

As is clear from the above explanation, according to the range hood fan according to claim 1, For example, if the intake air through the intake port is inside the hood body equipped with an air blower and the temperature exceeds the specified temperature. A ventilation cutoff device is installed to cut off the air passage between the air intake and the blower when Because of the structure, the ventilation shutoff device can be shut off quickly, and Not only does it not increase the strength of the flames below the card body, but it also prevents the fire from spreading to the blower, etc. It has the excellent effect of preventing

[0026] Further, according to the range hood fan according to claim 2, the ventilation cutoff device includes a cutoff operation. The structure shall include a protruding member that protrudes downward from the lower surface of the hood body as the hood is operated. This can prevent the flame below the hood body from spreading laterally.

[Brief explanation of drawings]

[Fig. 1] Vertical front view showing one embodiment of the present invention

[Figure 2] Side view

[Figure 3] Vertical front view of the ventilation cutoff device in the state where it is cut off

[Explanation of symbols]

1 is the hood body, 2 is the blower, 14 is the bottom opening, 15
is an intake port, 17 is a ventilation path, 18 is a closing plate (protruding member),
21 is a thermal fuse, and 23 is a ventilation cutoff device.

Claims (2)

[Scope of utility model registration request] 1. A hood main body having an open bottom surface, which is provided with a blower inside the hood body for sucking indoor air through an intake port communicating with the bottom opening and discharging the sucked air to the outside. A range hood fan characterized in that a ventilation blocking device is provided in the hood body to block an air passage between the intake port and the blower when the intake air through the intake port reaches a predetermined temperature or higher. . 2. The range hood fan according to claim 1, wherein the ventilation blocking device includes a protruding member that protrudes downward from the lower surface of the hood main body in response to the blocking operation.