JP2017198363A - Range hood device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a range hood device that can reduce time and effort for maintenance while maintaining long term collection performance and inhibit polluted air from spreading around.SOLUTION: A range hood device 1A includes: an air blower 20; an inlet 11 for taking air from a space 90 upstream of the air blower 20; a cyclone separator 10 through which inflow air from the inlet 11 passes; and an air outlet 30 for blowing an air flow 91 having such a horizontal velocity component V1 that a horizontal distance to the inlet 11 comes close to the inlet 11, into the space 90.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a range hood device.

  In general, range hood fans use filters to separate dirt from contaminated air. If dirt accumulates on the filter and becomes clogged, the air volume decreases and the ability to collect contaminated air decreases. Therefore, frequent maintenance is required.

  In response to such a problem, Patent Document 1 below discloses a range hood fan provided with a cyclone separator. The cyclone separator separates and collects dirt from the contaminated air by centrifugal force, so there is no need to use a filter, and there is no reduction in air volume due to clogging of the filter. The ability to collect can be maintained.

JP-A-10-26385

  In the range hood fan equipped with a cyclone separator, the air volume is reduced compared to the case where the cyclone separator is not provided due to the pressure loss of the cyclone separator. As a result, the range in which contaminated air can be captured is narrowed. Therefore, there is a possibility that the contaminated air that cannot be captured spreads to the surrounding space and the surrounding devices and the like become dirty.

  The present invention has been made to solve the above-described problems, and is a range hood device that can reduce maintenance work while maintaining collection performance for a long period of time, and can suppress the spread of contaminated air to the surroundings. The purpose is to provide.

  The range hood device according to the present invention includes a blower, an inlet for taking in air from the space on the upstream side of the blower, a cyclone separator through which air flowing in from the inlet passes, and a horizontal distance between the inlet and the inlet. And an air outlet that blows out an airflow having a velocity component in the horizontal direction approaching to the space.

  According to the range hood apparatus of the present invention, maintenance work can be reduced while maintaining the collection performance for a long time, and the spread of contaminated air to the surroundings can be surely suppressed by providing the air outlet. It becomes.

It is typical sectional drawing which shows the range hood apparatus of Embodiment 1. FIG. It is a typical perspective view of the cyclone separator with which the range hood apparatus of Embodiment 1 is provided. It is typical sectional drawing which shows the range hood apparatus of Embodiment 2. FIG. It is typical sectional drawing which shows the range hood apparatus of Embodiment 3. FIG.

  Hereinafter, embodiments will be described with reference to the drawings. Elements common to the drawings are denoted by the same reference numerals, and redundant description is simplified or omitted. The present disclosure may include any combination of configurations that can be combined among the configurations described in the following embodiments.

Embodiment 1 FIG.
FIG. 1 is a schematic cross-sectional view showing a range hood device 1A according to the first embodiment. FIG. 2 is a schematic perspective view of the cyclone separator 10 provided in the range hood apparatus 1A of the first embodiment.

  As shown in FIG. 1, the range hood device 1 </ b> A according to the first embodiment includes a cyclone separator 10, an inlet 11, a blower 20, an outlet 30, an air supply path 31, a control device 50, and a dirt sensor 51. The inflow port 11 is on the upstream side of the blower 20. The inflow port 11 takes in air (hereinafter referred to as “contaminated air”) mixed with dirt substances generated when cooking food from the space 90. The blower 20 generates a wind that sucks contaminated air to the inlet 11, that is, an air flow.

  The space 90 is a space where contaminated air can exist. The space 90 may be a space under the main body 40 of the range hood apparatus 1A. The space 90 may be a space above a cooking utensil (not shown). The cooking utensil may be, for example, at least one of a gas stove, an electric stove, a charcoal stove, and an IH (Induction Heating) cooker. The dirt substance is a fine particle made of, for example, oil, tar, burnt food, charcoal or ash.

  The contaminated air taken in from the inlet 11 flows into the cyclone separator 10. The flow path in the cyclone separator 10 is on the downstream side of the inflow port 11 and on the upstream side of the blower 20. The cyclone separator 10 separates dirt substances from the contaminated air by centrifugal force by swirling the contaminated air inside. The separated dirt material is temporarily stored in the cyclone separator 10.

  As shown in FIG. 2, the cyclone separator 10 includes an inflow pipe 12, a swirl chamber 13, a first opening 14, a first dust collection part 15, and a discharge pipe 16. The inflow pipe 12 connects between the inflow port 11 and the swirl chamber 13. The contaminated air flows into the swirl chamber 13 from the inlet 11 through the inlet pipe 12. The contaminated air swirls in the swirl chamber 13. In the present embodiment, the length of the inflow pipe 12 is short, and the inflow port 11 is formed integrally with the cyclone separator 10. Not only in such a configuration, the position of the inlet 11 and the position of the cyclone separator 10 may be separated. There may be a plurality of inlets 11.

  The inflow pipe 12 is connected to the upper part of the swirl chamber 13. The inflow pipe 12 extends from the cylindrical side wall of the swirl chamber 13 toward the tangential direction of the side wall. The swirl chamber 13 is arranged such that its central axis faces the up-down direction. The swirl chamber 13 includes a cylindrical portion having a cylindrical shape and a conical portion connected coaxially under the cylindrical portion. The conical portion has a hollow truncated cone shape in which the apex and the vicinity thereof are cut off at the tip. The diameter of the cone decreases in the downward direction.

  The contaminated air is introduced along the side wall of the swirl chamber 13 from the inflow pipe 12 and swirls along the side wall of the swirl chamber 13. Dirty substances are separated from contaminated air by centrifugal force when swirling. A first opening 14 is formed at the lower end of the swirl chamber 13, that is, at the lower end of the conical portion. The first dust collecting unit 15 communicates with the inside of the swirl chamber 13 through the first opening 14. The dirt substance separated in the swirl chamber 13 gathers in the first dust collecting section 15 through the first opening 14 and is temporarily stored.

  In the following description, the air in which the dirt substance is separated from the contaminated air by the cyclone separator 10 is referred to as “clean air”. The clean air is discharged out of the cyclone separator 10 through the discharge pipe 16. The discharge pipe 16 has a cylindrical shape. The discharge pipe 16 projects from the upper surface of the swirl chamber 13 into the swirl chamber 13.

  As shown in FIG. 1, a blower 20 is disposed on the downstream side of the discharge pipe 16 of the cyclone separator 10. The exhaust air passage 21 communicates with the downstream side of the blower 20. The downstream side of the exhaust air passage 21 may be connected to a duct that leads to the outside of the space 90, for example, a duct that leads to the outside of the room. The exhaust air passage 21 is an example of a discharge part.

  The blower outlet 30 blows out the air current 91 to the space 90. There may be a plurality of outlets 30. The air flow 91 is blown from the outlet 30 to the space 90, so that an induced air flow 92 is generated in the space 90. The induced airflow 92 has an effect of attracting contaminated air to the vicinity of the inlet 11. A vector V in FIG. 1 indicates a velocity vector of the air flow 91 blown out from the air outlet 30. Vector V1 represents the horizontal component of vector V. A vector V2 represents a vertical component of the vector V.

  The airflow 91 blown out from the air outlet 30 has a horizontal velocity component V1 such that the horizontal distance from the air inlet 11 approaches the air inlet 11. Since the airflow 91 has the velocity component V1, the induced airflow 92 that flows in the direction approaching the inflow port 11 can be efficiently generated.

  According to the present embodiment, since the cyclone separator 10 is provided, dirt substances can be separated without using a filter. Therefore, since the air volume does not decrease due to clogging of the filter, the collection ability can be maintained for a long time without frequent maintenance.

  In the present embodiment, due to the pressure loss of the cyclone separator 10, the amount of air sucked from the inflow port 11 is reduced as compared with the configuration without the cyclone separator 10. Generally, when the amount of air sucked from the inflow port 11 is low, the range in which contaminated air can be sucked becomes narrow. If the range in which the contaminated air can be sucked is narrow, the contaminated air may diffuse to the surroundings, and the surrounding equipment and facilities may become dirty. On the other hand, in the present embodiment, the contaminated air can be efficiently attracted toward the inflow port 11 by the induced airflow 92. For this reason, it can suppress reliably that contaminated air spread | diffuses to circumference | surroundings, and it can avoid reliably surrounding equipment, an installation, etc.

  The air supply path 31 is a passage that sends a part of the clean air stream downstream of the blower 20 to the upstream of the outlet 30. A part of the air flow of the clean air produced by the blower 20 can be blown out as an air flow 91 from the blower outlet 30. Thereby, the following effects are acquired. Since another air blower for blowing the airflow 91 from the blower outlet 30 is not required, the structure can be simplified and the cost can be reduced. Since it is not necessary to provide a filter for preventing the entry of dirt substances from the suction port for taking air into the other blower, the maintenance of the filter is not necessary, and the maintenance work can be further reduced.

  In the present embodiment, only a part of the clean air stream downstream of the blower 20 is sent to the outlet 30 through the air supply path 31 and the remaining portion of the clean air stream downstream of the blower 20 is exhausted. It is discharged outside through the passage 21. Thereby, the following effects are acquired. By exhausting clean air to the outside, indoor ventilation can be performed.

  The blower outlet 30 is in the lower part of the main body 40 of the range hood apparatus 1A. The air outlet 30 is in the upper part of the space 90. The airflow 91 blown out from the blower outlet 30 has a velocity component V2 that is directed vertically downward. According to these configurations, the induced airflow 92 that flows in a direction approaching the inflow port 11 can be generated more efficiently in the space 90.

  In this Embodiment, the cyclone separator 10 and the inflow port 11 exist in the position close | similar to the outer edge part of the one end side of the main body 40 of 1 A of range hood apparatuses. The blower outlet 30 exists in the position close | similar to the outer edge part of the other end side of the main body 40 of 1 A of range hood apparatuses. These positional relationships are not limited to the above configuration. For example, the inlet 11 may be disposed at the center of the main body 40 of the range hood apparatus 1A, and the plurality of outlets 30 may be disposed at the peripheral edge of the main body 40 of the range hood apparatus 1A.

  The dirt sensor 51 is an example of means for detecting the dirt of contaminated air. The dirt sensor 51 may be any one of a dust sensor, a suspended particle sensor, and an aerosol sensor, for example. The dirt sensor 51 may be a sensor using the principle of light scattering. The dirt sensor 51 may be installed at a position facing the space 90. In the configuration shown in the figure, a dirt sensor 51 is installed in the main body 40 of the range hood apparatus 1A. For example, the dirt sensor 51 may be installed in the cyclone separator 10 without being limited to such a configuration. The dirt sensor 51 may detect at least one of the amount of dirt substance contained in the contaminated air, the number of particles per volume, and the particle diameter.

  The control device 50 controls the operation of the blower 20. When the amount of air dirt detected by the dirt sensor 51 is greater than the reference, the control device 50 determines that the air blower 20 has a smaller amount of air dirt detected by the dirt sensor 51 than the reference. The air volume may be increased. By doing so, the following effects can be obtained. When the amount of dirt is small, that is, when the collection capacity required for the cyclone separator 10 is relatively low, by reducing the input to the blower 20, it is possible to suppress power consumption and reduce the air volume. Thus, the sound generated by the airflow swirling in the swirl chamber 13 can be reduced. Usability can be improved by automatically controlling the air volume of the blower 20 to an appropriate air volume.

  The first dust collecting unit 15 may be detachable from other parts of the cyclone separator 10. Since the first dust collecting part 15 is detachable, the dirt substance accumulated in the first dust collecting part 15 can be easily discarded, and the maintainability is improved and the usability is improved. A configuration in which a transparent member is used for at least a part of the first dust collecting portion 15 so that the inside is visible is desirable. This is because the user can easily check the amount of the dirt substance accumulated in the first dust collecting portion 15. The cyclone separator 10 may be detachable from the main body 40 of the range hood apparatus 1A.

Embodiment 2. FIG.
Next, the second embodiment will be described with reference to FIG. 3. The description will focus on the differences from the first embodiment described above, and the description of the same or corresponding parts will be simplified or omitted. FIG. 3 is a schematic cross-sectional view showing the range hood apparatus 1B of the second embodiment.

  As shown in FIG. 3, the range hood apparatus 1 </ b> B of the second embodiment includes a valve 22 and a bypass channel 23. The bypass flow path 23 is a flow path that connects the inlet 11 and the blower 20 without passing through the cyclone separator 10. The valve 22 switches between a state where air passes through the bypass passage 23 and a state where air does not pass through the bypass passage 23. FIG. 3 shows a state in which air passes through the bypass channel 23. The valve 22 includes a valve body 22a and a rotating shaft 22b. The valve 22 may include an actuator (not shown) that rotates the valve body 22a around the rotation shaft 22b. In the state of FIG. 3, the valve body 22 a is in a position for closing the discharge pipe 16 of the cyclone separator 10. When the valve body 22a rotates counterclockwise by 180 ° from the state of FIG. 3, the air does not pass through the bypass passage 23. In a state where air does not pass through the bypass channel 23, the valve body 22 a is in a position where the bypass channel 23 is blocked and the discharge pipe 16 of the cyclone separator 10 is not blocked.

  For example, there may be a case where the dirt substance is hardly contained in the air of the space 90 as in the case of boiling hot water. In such a case, it can be said that there is no need to pass the air taken in from the inlet 11 through the cyclone separator 10. In the present embodiment, when there is no need to pass the air taken in from the inflow port 11 through the cyclone separator 10, the cyclone separator is switched by switching the valve 22 so that the air passes through the bypass flow path 23. The air can be sent to the exhaust air passage 21 without passing through 10. In that case, since the pressure loss of the bypass flow path 23 is smaller than that of the cyclone separator 10, the input to the blower 20 can be reduced, and the power consumption can be suppressed. Moreover, since there is no sound generated by the airflow swirling in the swirl chamber 13, the sound can be suppressed and the usability can be improved.

  The control device 50 may control switching of the valve 22. The control device 50 may control the switching of the valve 22 according to the air dirt detected by the dirt sensor 51. When the air pollution detected by the dirt sensor 51 is less than the standard, the air passes through the bypass passage 23, and when the air dirt detected by the dirt sensor 51 is larger than the standard. The control device 50 may control the switching of the valve 22 so that air passes through the cyclone separator 10 without passing through the bypass flow path 23. Usability can be improved by automatically controlling the valve 22 to an appropriate state.

  The control device 50 is not limited to the configuration for controlling the switching of the valve 22, and the user may operate the switching of the valve 22.

  The range hood apparatus 1B according to the second embodiment includes a second blower 32 instead of the air supply path 31 according to the first embodiment. The second blower 32 generates an air flow 93 blown from the blower outlet 30. If it is this Embodiment, since the air flow 93 from the blower outlet 30 is produced | generated by the 2nd air blower 32 different from the fan 20, it becomes possible to design the position of the blower outlet 30, and blowing air volume freely.

  A vector V <b> 3 in FIG. 3 indicates a velocity vector of the airflow 93 blown from the blower outlet 30. Vector V4 represents the horizontal component of vector V3. Vector V5 represents the vertical component of vector V3.

  The air flow 93 blown out from the air outlet 30 has a horizontal velocity component V3 such that the horizontal distance from the air inlet 11 approaches the air inlet 11. Since the airflow 93 has the velocity component V3, an induced airflow 92 that flows in a direction approaching the inflow port 11 can be efficiently generated.

  The blower outlet 30 exists in the position different from the main body 40 of the range hood apparatus 1B. The air outlet 30 is in the lower part of the space 90. The airflow 93 blown out from the blower outlet 30 has a velocity component V5 that is directed vertically upward. According to these configurations, the following effects can be obtained. The induced airflow 92 that flows in the direction approaching the inflow port 11 can be generated more efficiently in the space 90. The contaminated air below the space 90 is easily guided by the inlet 11 at the upper part of the space 90, and a wider range of contaminated air can be sucked from the inlet 11.

Embodiment 3 FIG.
Next, the third embodiment will be described with reference to FIG. 4. However, the difference from the first embodiment will be mainly described, and the description of the same or corresponding parts will be simplified or omitted. FIG. 4 is a schematic cross-sectional view showing the range hood apparatus 1C of the third embodiment.

  As shown in FIG. 4, the range hood apparatus 1 </ b> C of the third embodiment is partially different from the first embodiment in the configuration of the cyclone separator 10. The cyclone separator 10 according to the third embodiment further includes a second opening 17 and a second dust collecting unit 18 in addition to the configuration of the cyclone separator 10 according to the first embodiment. The second opening 17 is formed on the side wall of the cylindrical portion of the swirl chamber 13. For example, the second opening 17 may be formed from a position near the lower end of the cylindrical portion to the upper end of the conical portion. The second opening 17 is formed at a position higher than the first opening 14, that is, on the upstream side. The second dust collection unit 18 communicates with the swirl chamber 13 through the second opening 17.

  In the present embodiment, the following effects can be obtained. A relatively large dirt substance is separated at the cylindrical portion of the swirl chamber 13 and collected by the second dust collecting portion 18 through the second opening 17. Thereafter, a relatively small dirt substance is separated at the conical portion of the swirl chamber 13 and collected by the first dust collecting portion 15 through the first opening 14. Therefore, it is possible to more efficiently collect dirt substances having different sizes, and further improve the collection performance.

  The second dust collecting unit 18 may be detachable from other parts of the cyclone separator 10. The first dust collecting unit 15 and the second dust collecting unit 18 may be individually detachable from other parts of the cyclone separator 10. The first dust collecting unit 15 and the second dust collecting unit 18 may be integrated and detachable from the main body 40 of the cyclone separator 10.

1A, 1B, 1C Range hood device, 10 cyclone separator, 11 inlet, 12 inlet pipe, 13 swirl chamber, 14 first opening, 15 first dust collecting part, 16 discharge pipe, 17 second opening, 18 2nd dust collecting part, 20 air blower, 21 exhaust air path, 22 valve, 22a valve body, 22b rotating shaft, 23 bypass flow path, 30 outlet, 31 air supply path, 32 second air blower, 40 main body, 50 control device , 51 Dirt sensor, 90 space, 91 airflow, 92 induced airflow, 93 airflow

Claims (9)

A blower,
An inlet for taking in air from the space upstream of the blower;
A cyclone separator through which air flowing in from the inlet passes,
A blowout port that blows out an airflow having a horizontal velocity component such that a horizontal distance from the inflow port approaches the inflow port;
A range hood device comprising: An air supply path for sending a part of the airflow downstream of the blower to the upstream of the outlet;
A discharge part for discharging the remaining airflow downstream of the blower out of the space;
The range hood apparatus of Claim 1 provided with.   The range hood apparatus of Claim 1 provided with the 2nd air blower which produces the said airflow which blows off from the said blower outlet.   The range hood apparatus according to any one of claims 1 to 3, wherein the air flow blown out from the air outlet has a velocity component directed vertically downward.   The range hood apparatus according to any one of claims 1 to 3, wherein the air flow blown out from the air outlet has a velocity component directed vertically upward. A bypass passage that is a passage through which air passes from the inlet to the blower without passing through the cyclone separator;
A valve that switches between a state in which air passes through the bypass passage and a state in which air does not pass through the bypass passage;
The range hood apparatus as described in any one of Claims 1-5 provided with these. Means for detecting air pollution,
Means for controlling the valve so that air passes through the bypass passage if the contamination is less than a reference, otherwise air does not pass through the bypass passage;
A range hood device according to claim 6. The cyclone separator is
A swirl chamber in which air swirls,
A first opening formed at the lower end of the swirl chamber;
A first dust collecting portion communicating with the inside of the swirl chamber via the first opening;
A second opening formed in a side wall of the swirl chamber;
A second dust collecting part communicating with the inside of the swirl chamber via the second opening;
The range hood apparatus as described in any one of Claims 1-7 provided with these. Means for detecting air pollution,
Means for increasing the air volume of the blower when there is a lot of dirt compared to when there is little dirt;
The range hood apparatus as described in any one of Claims 1-8 provided with these.

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