Oil mist collection filter and ventilation system

Abstract

To make it possible to collect soot generated during cooking, prevent clogging, and suppress decrease in air volume due to increased pressure loss and decrease in soot collection rate even in long-term use.SOLUTION: A soot collection filter has: a plurality of mountain folds 30 positioned on a windward side; a plurality of valley folds 40 positioned on a leeward side; and a ventilation part 50 which is positioned between the mountain fold 30 and the valley fold 40 that are adjacent to each other, and through which wind passes. At least one of the mountain fold 30 and the valley fold 40 is provided with an oil storage part 60 which has a smaller gap size than the ventilation part 50.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an oil fume collection filter and a ventilation system including the same.

Background Art

[0002] There is a prediction that the future form of a kitchen will mainly incorporate a so-called island-type ventilation system that allows cooking while facing the family.

[0003] Since a major pipe installation work is required for a layout change to an island-type ventilation system, instead of exhausting the oil fume during cooking to the outside through a duct provided at a predetermined position, there are merits such as easier installation and freer layout change by eliminating the duct.

[0004] A ventilation system capable of accommodating ductless operation is configured to remove oil fume from the sucked air and return it to the room. Therefore, in order to prevent the diffusion of oil fume into the room and the clogging of the oil fume on the deodorizing filter, the development of an oil fume collection filter for collecting oil fume has become an urgent task for improving the quality of the future living environment.

[0005] Under such circumstances, the inventor of the present application attempted to apply a filter for an air cleaner as shown in Patent Document 1 to an oil fume collection filter. This filter for an air cleaner is a so-called pleated filter formed by folding and has merits such as obtaining a large filtration area.

[0006] However, since the pleated filter for an air cleaner is designed to collect tobacco, dust, etc., simply using it as an oil fume collection filter results in a high replacement frequency due to clogging and is not practical.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

[0008] Therefore, the present invention was made to solve the above-mentioned problems, and its main objective is to be able to capture oil fumes generated during cooking, to be less prone to clogging, and to suppress the decrease in airflow due to increased pressure loss and the decrease in oil fumes capture efficiency even during long-term use. [Means for solving the problem]

[0009] In other words, the oil mist collection filter according to the present invention has a plurality of mountain-fold sections located on the windward side, a plurality of valley-fold sections located on the leeward side, and a ventilation section located between adjacent mountain-fold sections and valley-fold sections through which wind passes, and is characterized in that an oil storage section with a smaller gap size than the ventilation section is provided in at least one of the mountain-fold sections or valley-fold sections.

[0010] With this type of oil mist collection filter, oil adhering to the ventilation section is drawn by capillary action towards the oil storage section, which has a smaller gap size than the ventilation section. This allows for the collection of oil contained in the mist while avoiding an increase in pressure loss in the ventilation section. As a result, clogging is less likely to occur, and even with long-term use, a decrease in airflow due to increased pressure loss and a decrease in the oil mist collection rate can be suppressed.

[0011] It is preferable that the oil storage section is provided at least in the valley-fold section. This design allows the valley-fold sections, where the wind velocity vector is small and therefore less effective as ventilation areas, to be used as oil storage areas. This enables the use of a wider area with a large wind velocity vector as a ventilation area, thereby suppressing pressure loss during the initial stages of use. Furthermore, because some of the passing air remains in the valley section, more oil from the smoke deposits, which also improves the efficiency of oil collection.

[0012] One possible approach for the oil storage section is to install a separate component with a finer mesh than the ventilation section, such as filter paper; however, this could lead to a decrease in productivity. Therefore, it is preferable that at least one of the peaks of the mountain fold or the valley bottom of the valley fold is flattened, and that the flattened portion functions as the oil storage portion. This allows for the installation of an oil storage section without the need for separate components, thus ensuring productivity.

[0013] A more specific embodiment is one in which the shape of the mountain fold portion and the shape of the valley fold portion are asymmetrical to each other. This allows you to see at a glance which side is upwind and which is downwind, preventing, for example, errors in installation direction.

[0014] It is preferable that the gap on the valley fold side is wider than the gap on the mountain fold side. This allows for a wider airflow path after the filter has been opened.

[0015] In order for the oil storage section to exhibit sufficient storage function, it is preferable that the length of the oil storage section along the ventilation direction is 1 / 10 or more of the overall size of the filter along the ventilation direction.

[0016] Furthermore, the ventilation system according to the present invention is characterized by being equipped with the above-described oil mist collection filter, and such a ventilation system can achieve the same effects as the above-described collection filter.

[0017] To more significantly demonstrate the effects described above, a ventilation system is preferable that draws in oil fumes, passes them through the oil fumes collection filter, and returns the air from which the oil fumes have been removed to the room. [Effects of the Invention]

[0018] According to the present invention configured as described above, it is possible to collect the fumes generated during cooking, and it is also difficult for clogging to occur, and it is possible to suppress a decrease in the air volume due to an increase in the pressure loss and a decrease in the fume collection rate even during long-term use.

Brief Description of the Drawings

[0019] [Figure 1] Schematic diagram showing the appearance of the ventilation system in one embodiment. [Figure 2] Schematic diagram showing the configuration of the ventilation system in the same embodiment. [Figure 3] Schematic diagram showing the configuration of the fume collection filter in the same embodiment. [Figure 4] Schematic diagram showing the configuration of the oil storage part in the same embodiment. [Figure 5] Magnified photographs before and after heat pressure bonding of the valley folding part in the same embodiment. [Figure 6] Experimental data showing the action and effect of the oil storage part in the same embodiment. [Figure 7] Experimental data showing the action and effect of the oil storage part in the same embodiment. [Figure 8] Schematic diagram showing the configuration of the oil storage part in other embodiments.

Mode for Carrying Out the Invention

[0020] Hereinafter, an embodiment of a fume collection filter according to the present invention and a ventilation system including this fume collection filter will be described with reference to the drawings.

[0021] As shown in FIG. 1, the ventilation system X according to the present embodiment is, for example, used in an island-type kitchen, and here it is used in a ductless kitchen, and is configured to suck the fumes generated during cooking, pass them through the fume collection filter 100, and then return the air from which the fumes have been removed to the room.

[0022] Although Figure 1 shows a ventilation system X that draws oil fumes upward, a downdraft type ventilation system that draws oil fumes downward may also be used. Furthermore, the ventilation system X according to the present invention is not necessarily limited to those used in ductless kitchens, and may also be one that exhausts the sucked-in oil fumes to the outside after passing them through an oil fumes collection filter 100.

[0023] The specific configuration of the ventilation system X may be changed as appropriate, but here, as shown in Figure 2, it includes a coarse mesh filter 200, an oil mist collection filter 100 with a finer mesh than the mesh filter 200, an even finer deodorizing filter 300, and a fan F for sucking up oil mist.

[0024] Furthermore, the ventilation system X of this embodiment is characterized by its oil mist collection filter 100, which will be described in detail below.

[0025] The oil mist collection filter 100 is used to collect oil contained in oil mist, and as shown in Figure 3, it is a pleated filter made of nonwoven fabric that has been folded into pleats.

[0026] This oil mist collection filter 100 is made by bonding together a filter material layer 10 made of filter material and an aggregate layer 20 made of aggregate that supports the filter material, and has a plurality of mountain folds 30 and a plurality of valley folds 40.

[0027] Specifically, the oil mist collection filter 100 has a cross-section in which mountain folds 30 and valley folds 40 are alternately repeated, and this cross-sectional shape may be fixed by a resin material called a bead, for example.

[0028] In this configuration, the region of the oil mist collection filter 100 located between adjacent mountain-fold sections 30 and valley-fold sections 40 functions primarily as a ventilation section 50 through which wind passes.

[0029] However, as shown in Figure 4, the oil mist collection filter 100 is provided with an oil storage section 60 in the aforementioned valley-fold section 40, which attracts and stores oil adhering to the ventilation section 50.

[0030] The oil storage section 60 has a smaller void size compared to the ventilation section 50, or in other words, a smaller void ratio compared to the ventilation section 50, which causes a capillary action that permeates and transports (attracts) the oil adhering to the ventilation section 50. The void size is the distance between the fibers constituting the filter material layer 10, and the void ratio is the proportion of voids per unit volume in the filter material layer 10.

[0031] In this embodiment, the bottom of the valley fold portion 40 is flattened, and this flattened portion of the valley fold portion 40 functions as an oil storage portion 60.

[0032] More specifically, as shown in Figure 5, the valley fold portion 40 of this embodiment is folded and then heat-pressed to flatten the bottom of the valley. This heat-pressing increases the diameter of the fibers constituting the filter material layer 10 compared to before heat-pressing.

[0033] In other words, the diameter of the fibers constituting the filter material layer 10 in the oil storage section 60 is larger than that of the ventilation section 50, and as a result the void size (i.e., porosity) is smaller than that of the ventilation section 50.

[0034] Furthermore, the length L1 of the oil storage section 60 along the ventilation direction is preferably 1 / 10 or more of the overall size (thickness dimension) L2 of the filter along the same ventilation direction, as shown in Figure 4.

[0035] In this embodiment, the oil storage section 60 is provided only in the valley fold section 40, and the mountain fold section 30 functions as part of the ventilation section 50 without its apex being crushed.

[0036] As a result, as shown in Figure 4, the shape of the mountain fold portion 30 and the valley fold portion 40 of the oil mist collection filter 100 are asymmetrical, and the gap G2 on the valley fold portion 40 side is wider than the gap G1 on the mountain fold portion 30 side. The gap G1 on the mountain fold portion 30 side is the space sandwiched between the filter surface extending from the vertices of adjacent mountain fold portions 30 toward the valley fold portion 40, and the gap G2 on the valley fold portion 40 side is the space sandwiched between the filter surface extending from the bottom of the valleys of adjacent valley fold portions 40 toward the mountain fold portion 30. Both are spaces partitioned within the total length L2 of the filter.

[0037] With the oil mist collection filter 100 configured in this way, oil adhering to the ventilation section 50 is drawn by capillary action towards the oil storage section 60, which has a smaller gap size than the ventilation section 50. This allows for the collection of oil contained in the oil mist while avoiding an increase in pressure loss in the ventilation section 50. As a result, clogging is less likely to occur, and even with long-term use, a decrease in airflow due to increased pressure loss and a decrease in the oil mist collection rate can be suppressed.

[0038] To describe these effects in more detail, as shown in Figure 6, it can be seen that the configuration with the oil storage section 60 in this embodiment is better able to suppress the increase in pressure loss of the oil mist collection filter 100 with respect to the amount of oil mist generated compared to a configuration without the oil storage section 60.

[0039] Furthermore, as shown in Figure 7, it can be seen that the configuration with the oil storage unit 60 in this embodiment is able to suppress the decrease in the oil mist collection rate relative to the amount of oil mist generated, compared to a configuration without the oil storage unit 60.

[0040] Furthermore, in this embodiment, the oil storage section 60 is provided in the valley-fold section 40 where the velocity vector of the passing air is small and it is difficult to function as a ventilation section 50, and a wide area with a large velocity vector is used as the ventilation section 50, so pressure loss in the initial stages of use can be suppressed. Furthermore, since some of the passing air remains in the valley-fold section 40, more oil contained in the oil mist is deposited, which also improves the efficiency of oil collection.

[0041] In addition, since the bottom of the valley fold 40 is heated and pressed to enable it to function as an oil storage section 60, the formation of the oil storage section 60 is simple and productivity can be ensured.

[0042] Furthermore, since the gap G2 on the valley fold 40 side is wider than the gap G1 on the mountain fold 30, the formation of the oil storage section 60 allows for a wider air passage after passing through the filter, and the pressure loss of the oil mist collection filter 100 can be designed to be low.

[0043] However, the present invention is not limited to the embodiments described above.

[0044] For example, in the above embodiment, the oil storage section 60 was provided only in the valley fold section 40, but the oil storage section 60 may be provided in both the valley fold section 40 and the mountain fold section 30, or it may be provided only in the mountain fold section 30. However, if the oil storage section 60 is provided in both the valley fold section 40 and the mountain fold section 30, the shape of the mountain fold section 30 and the shape of the valley fold section 40 will be symmetrical to each other.

[0045] One method for providing an oil storage section 60 in the mountain fold section 30 is to flatten the apex of the mountain fold section 30, similar to the valley fold section 40 in the above embodiment, thereby making the flattened portion of the mountain fold section 30 function as an oil storage section 60.

[0046] Furthermore, the oil storage section 60 is not necessarily limited to being formed by crushing the valley fold section 40 or the mountain fold section 30, but as shown in Figure 8, it may also be formed from a different material 70 than the nonwoven fabric, with a smaller void size than the ventilation section 50. Examples of such material 70 include paper, cloth, or string.

[0047] Furthermore, in the above embodiment, the diameter of the fibers constituting the filter material layer 10 of the oil storage section 60 was larger than that of the ventilation section 50. However, as long as permeation and transport by capillary action are achieved, the fiber diameter of the oil storage section 60 is not limited to the above embodiment. It may be smaller than that of the ventilation section 50, or it may be the same as that of the ventilation section 50.

[0048] Furthermore, although the above embodiment described a case in which the oil mist collection filter 100 is applied to a ventilation system X, the oil mist collection filter 100 according to the present invention may also be used in an air purifier. In other words, an air purifier equipped with the oil mist collection filter 100 according to the present invention is also one embodiment of the present invention.

[0049] Furthermore, it goes without saying that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from its spirit. [Explanation of Symbols]

[0050] X ···Ventilation System 100... Oil mist collection filter 200-mesh filter 300... Deodorizing filter F ···Fan 10...filter layer 20...Aggregate layer 30 ···Mountain fold section 40 ··· Valley fold section 50...Ventilation section 60 ···Oil Storage Section 70 ··· component

Claims

1. Multiple mountain-fold sections located on the windward side, Multiple valley-fold sections located on the leeward side, It has a ventilation section located between the adjacent mountain folds and valley folds, through which wind can pass. An oil mist collection filter characterized in that at least one of the mountain-fold portion or the valley-fold portion is provided with an oil storage portion having a smaller void ratio than the ventilation portion.

2. The oil mist collection filter according to claim 1, characterized in that the oil storage section is provided at least in the valley-fold section.

3. The oil mist collection filter according to claim 1 or 2, characterized in that at least one of the apex of the mountain fold or the bottom of the valley fold is crushed, and the crushed portion functions as the oil storage portion.

4. An oil mist collection filter according to any one of claims 1 to 3, wherein the shape of the mountain fold portion and the shape of the valley fold portion are asymmetrical with respect to each other.

5. The oil mist collection filter according to any one of claims 1 to 4, characterized in that the space extending from the top of adjacent mountain folds towards the valley fold located between them is greater than the space extending from the bottom of adjacent valley folds towards the mountain fold located between them.

6. An oil mist collection filter according to any one of claims 1 to 5, characterized in that the length of the oil storage section along the ventilation direction is 1 / 10 or more of the overall size of the filter along the ventilation direction.

7. A ventilation system characterized by comprising an oil mist collection filter according to any one of claims 1 to 6.

8. The ventilation system according to claim 7, characterized in that it sucks in oil fumes, passes them through the oil fumes collection filter, and returns the air from which the oil fumes have been removed to the room.

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