JP2020199783A - Filter of air conditioner for vehicle - Google Patents

Abstract

To provide filters which can display effectiveness for long term with large active substance of molecular mass by delaying reduction of the discharge amount about small active substance of molecular mass as well.SOLUTION: Filters 100, 100' of an air conditioner for a vehicle are installed within air passage of the air conditioner for the vehicle and are configured so that particulate to which volatile component is carried is affixed and that the particulate includes a first particulate 10 in which a first active substance V with relatively small molecular mass is carried and a second particulate 20 in which the first active substance V and a second active substance C with relatively large molecular mass are carried.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a dust collecting filter that is arranged in a vehicle air conditioner and has a function of discharging an active ingredient into the air.

In the field of dust collecting filters installed in vehicle air conditioners, a technique for using a filter having a function of releasing active ingredients such as vitamins in addition to a dust collecting function is disclosed. Patent Document 1 discloses a configuration in which fine particles of a ceramic body carrying an active ingredient such as a vitamin are attached to a base material of a filter. Ascorbic acid is exemplified as an example of vitamins. Further, it is disclosed that a plurality of active ingredients can be released from one filter by using collagens such as collagen and collagen peptide as other active ingredients of vitamins.

By the way, an active ingredient having a relatively small molecular weight (molecular weight is about 200 g / mol) such as ascorbic acid has a large release amount at the initial stage of use of the filter, but the release amount becomes early as the use is continued. There was a problem that it decreased and the effect of the active ingredient decayed quickly. This is because ascorbic acid supported on the surface of the ceramic body as a carrier or in the micropores of the ceramic body has a small molecular weight and can be easily volatilized in the air around the carrier.

On the other hand, active ingredients having a relatively large molecular weight such as collagen (molecular weight is about 3000 to 5000 g / mol) have a large release amount at the initial stage of use of the filter, and the release amount tends to decrease as the use is continued. Although it is observed, the rate of decrease in the amount of release is slow, and the amount of release is relatively stable.

However, even if a carrier carrying a small molecular weight active ingredient such as ascorbic acid and a carrier carrying a large molecular weight component such as collagen are prepared, and simply mixed and adhered to the base material of the filter. It is not possible to prolong the decay of the release of small molecular weight components. That is, the attenuation of the amount of emission is different for each active ingredient. Therefore, even if a plurality of active ingredients are supported on the filter, the initially expected plurality of effects (plural effects exerted by each active ingredient) cannot be sustained in a well-balanced manner.

JP-A-2009-012572

The present invention relates to a dust collecting filter that is installed in a vehicle air conditioner and emits a plurality of active ingredients. The present invention delays the attenuation of the emission amount of an active ingredient having a small molecular weight for a long period of time together with the active ingredient having a large molecular weight. The purpose is to provide a filter that can be exerted.

The filter (100) of the vehicle air conditioner according to the present invention is installed in the air passage of the vehicle air conditioner, and is impregnated with particles carrying a volatile component, and the particles are first effective with a relatively small molecular weight. The first particle (10) on which the component (V) is carried and the second particle (20) on which the first active ingredient (V) and the second active ingredient (C) having a relatively large molecular weight are carried are provided. It is characterized by having (claim 1).

Specifically, in the filter (100) of the vehicle air conditioner according to the present invention, the first active ingredient (V) contains a vitamin C derivative, and the second active ingredient (C) contains collagens (claim 2). ).

According to the present disclosure, with respect to a dust collecting filter installed in a vehicle air conditioner that emits a plurality of active ingredients, even an active ingredient having a small molecular weight can be delayed in attenuation of the emission amount, and can be effective together with an active ingredient having a large molecular weight. It is possible to provide a filter that can be exhibited for a long period of time.

It is the schematic which shows the dust collection filter which concerns on this embodiment. It is the schematic which shows the release state of the active ingredient of the 2nd particle which concerns on this embodiment immediately after the start of use and after use for a certain period of time. It is a graph which shows the change of the release amount of the active ingredient carried on each of the 1st particle and the 2nd particle which concerns on this Embodiment and the prior art example. It is a graph which shows the change of the release amount with respect to the start of use of the active ingredient carried on each of the 1st particle and the 2nd particle which concerns on this Embodiment and the prior art example. It is an example of the dust collection filter which concerns on this embodiment, and is a graph which shows the change of the amount of release of an active ingredient when the same amount of 1st particle and 2nd particle are attached to the filter. It is a schematic diagram which shows the dust collection filter which concerns on a prior art example. It is a schematic diagram which shows the release state of the active ingredient of the 1st particle which concerns on a prior art example immediately after the start of use and after use for a certain period.

Hereinafter, one aspect of the present invention will be described with reference to the accompanying drawings. The embodiments described below are examples of the present invention, and the present invention is not limited to the following embodiments. In the present specification and the drawings, the components having the same reference numerals shall indicate the same components. Various morphological changes may be made as long as the effects of the present invention are exhibited.

<Conventional example>
In order to explain the present invention, first, the conventional dust collecting filter 200 will be described with reference to FIGS. 6 and 7.

6A and 6B are schematic views showing a dust collecting filter 200 of a vehicle air conditioner according to a conventional example, FIG. 6A is a perspective view for explaining the shape of a pleated filter, and FIG. 6B is a collecting filter. A partially enlarged view of the dust filter 200, (c) is a schematic cross-sectional view for explaining the first particle 10 attached to the dust filter 200.

The dust collecting filter 200 is installed in an air passage of a vehicle air conditioner (not shown), captures sand, pollen, fibers, insects and the like contained in the air passing therethrough, and purifies the air. The filter medium 101 as the base material is made of a non-woven fabric composed of synthetic fibers such as filter paper or polyethylene fibers. Dust and dust larger than the gaps between the fibers are trapped by being caught in the fibers. Dust, dust, pollen, etc. smaller than the gaps between the fibers are generally charged and are captured by the intermolecular force acting between the fibers.

The dust collecting filter 200 is formed in a pleated state as shown in FIG. 6A. With such a shape, the surface area of the dust collecting filter 200 can be increased, the amount of air passing through the unit area of the filter medium 101 can be reduced, and the ventilation resistance can be reduced.

As shown in FIG. 6B, the surface of the filter medium 101 is impregnated with the first particles 10 on which the first active ingredient V is supported. For the attachment of the first particles 10 to the filter medium 101, for example, a well-known resin binder or the like is used.

As shown in FIG. 6C, the first particle 10 is a particle in which the first active ingredient V is adsorbed on the ceramic particle 1 serving as a carrier. The ceramic particles 1 are fine particles composed of, for example, silicon oxide, and the average particle size is preferably 20 μm or less, for example. The lower limit of the average particle size is not particularly limited, but may be submicron order particles having a size of less than 1 μm. Further, the ceramic particles 1 have a large number of pores 2 and have a large surface area. As a result, as shown in FIG. 6C, the first active ingredient V can be taken in and adsorbed not only on the surface of the ceramic particles 1 but also inside the pores 2. Further, the inside of the hole 2 communicates with the outside of the ceramic particles 1, and the first active ingredient V taken into the inside of the hole 2 can be dissipated to the outside of the ceramic particles 1. ..

The first active ingredient V is a component having a relatively smaller molecular weight than the second active ingredient described later. The first active ingredient V is a vitamin C derivative such as ascorbic acid or L-ascorbic acid-2-magnesium phosphate, and is a molecule having a relatively small molecular weight of about 200 g / mol. It is a component that volatilizes at room temperature and is taken into the human body to improve health and moisturize the skin.

FIG. 7 illustrates the release state of the first active ingredient of the first particle 10 according to the present embodiment, and FIG. 7A shows immediately after installing the dust collecting filter in the vehicle air conditioner and starting to use it. The schematic view, (b) is a schematic view after a predetermined period has elapsed.

As shown in FIG. 7A, the first active ingredient V separates from the ceramic particles 1 and is released into the air. Further, as shown in FIG. 7B, the first active ingredient V is separated from the ceramic particles 1 and released into the air even after a predetermined time has elapsed. However, the amount of the first active ingredient V released is large in FIG. 7 (a) and small in FIG. 7 (b). This is because the molecular weight of the first active ingredient is relatively small and there is no particular obstacle when the first active ingredient is separated from the pores 2, so that the dust collection filter 200 is immediately after the start of use or before the elapse of a predetermined time. This is because the first active ingredient V is easily separated from the ceramic particles 1, and the separation is substantially completed before a predetermined time elapses.

Next, it will be described with reference to the graphs of FIGS. 3 and 4 that the amount of the first active ingredient V released in the conventional example greatly fluctuates with the passage of time.

FIG. 3 is a graph showing changes in the amount of released active ingredients carried on the first particles and the second particles according to the present embodiment and the conventional example. Further, FIG. 4 shows a change in the release amount of the active ingredient carried on each of the first particle and the second particle according to the present embodiment and the conventional example, when the release amount at the start of use of the filter is 100. It is a graph shown as a rate.

The amount of release of the first active ingredient V was measured as follows. That is, the first particles 10 carrying the first active ingredient V were attached to the filter medium 101 (a dust collecting filter 200 was prepared), and the first particles 10 were installed on the upstream side of the test apparatus configured to allow air to pass therethrough. The area of the test piece was 0.3 m2. A blower arranged on the downstream side of the dust collection filter 200 was operated, air was passed through the dust collection filter 200, and air containing the first active ingredient V discharged from the test apparatus was bubbled in the chemical solution. At this time, for example, when collecting data with a blowing time of 100 hours, the blower is first operated for 100 hours (air temperature is about 25 ° C., air volume is 200 m3 / Hr), and then bubbling with the chemical solution for only 3 hours. It was. The air temperature and air volume during bubbling are the same as those during 100-hour ventilation. The chemical solution is a DPPH (1,1-diphenyl-2-picrylhydrazyl) 0.125 mmol / liter ethanol solution. The chemical solution changes color from purple to yellow by bubbling with air containing the first active ingredient V. Taking advantage of this, the degree of discoloration of the chemical solution bubbling for 3 hours was measured with a spectrophotometer to investigate the amount of the first active ingredient V released from the dust collection filter 200.

The values shown by Vsolo in FIGS. 3 and 4 are conventional examples, and are the amount of release of the first active ingredient V and the rate of change in the amount of release. Immediately after the start of use, it was about 0.20 ppm, but after using 500 Hr, it decreased to about 0.10 ppm. According to FIG. 4, after using 500 Hr, Vsolo decreased to about 50% immediately after the start of use, and the amount released at an early stage decreased.

<This Embodiment>
Next, the dust collecting filter 100 of the embodiment of the present invention will be described with reference to FIGS. 1 and 2.

1A and 1B are schematic views showing a dust collecting filter 100 of a vehicle air conditioner according to the present embodiment, FIG. 1A is a perspective view for explaining the shape of a filter formed in a pleated shape, and FIG. A partially enlarged view of the dust collection filter 100, (c) is a schematic cross-sectional view for explaining the first particle 10 attached to the dust collection filter 100, and (d) is a second particle 20 attached to the dust collection filter 100. It is a cross-sectional schematic diagram for demonstrating.

The dust collecting filter 100 is different from the conventional filter 200 except that the dust collecting filter 100 is installed in an air passage of a vehicle air conditioner (not shown) and releases the second active ingredient C to give a favorable effect to the occupants of the vehicle. The purpose and mechanism are the same. Further, the point that it is pleated is the same as the conventional example.

As shown in FIG. 1B, in addition to the first particle 10 on which the first active ingredient V was supported, the first active ingredient V and the second active ingredient C were supported on the surface of the filter medium 101. The second particle 20 is attached. For the attachment of the first particles 10 and the second particles to the filter medium 101, for example, a well-known resin binder or the like is used.

The first particle 10 shown in FIG. 1 (c) is the same as the first particle 10 used in the conventional example.

As shown in FIG. 1D, the second particle 20 is a particle in which the first active ingredient V and the second active ingredient C are adsorbed on the ceramic particle 1 serving as a carrier.

The second active ingredient C is a component having a relatively larger molecular weight than the first active ingredient. The first active ingredient C is, for example, collagens (collagen or collagen peptide), which is a molecule having a relatively large molecular weight of about 3000 to 5000 g / mol. It is a component that volatilizes at room temperature and is taken into the human body to improve health and moisturize the skin.

The first active ingredient V having a small molecular weight moves to the inner side of the pore 2 and is easily adsorbed, and the second active ingredient C having a large molecular weight does not easily move to the inner side of the pore 2. Therefore, as shown in FIG. 1D, the first active ingredient V penetrates to the inner side of the pore 2 and is adsorbed, while the second active ingredient C is the inlet of the pore 2 (ceramic particle 1). (Near the surface) or on the surface of the ceramic particles 1.

FIG. 2 illustrates the release state of each active ingredient of the second particle 20 according to the present embodiment, and FIG. 2A is an outline immediately after installing a dust collecting filter in a vehicle air conditioner and starting to use it. FIG. 3B is a schematic view after a predetermined period has elapsed.

As shown in FIG. 2A, the first active ingredient V and the second active ingredient C are separated from the ceramic particles 1 and released into the air. Further, as shown in FIG. 2B, the first active ingredient V and the second active ingredient C are separated from the ceramic particles 1 and released into the air even after a predetermined time has elapsed. .. Here, there is no significant difference between the amount of each component released in FIG. 2A and the amount of each component released in FIG. 2B. This is because the second active ingredient C is adsorbed near the inlet of the hole 2 and suppresses the release of the first active ingredient V which is about to be released from the inner side of the hole 2, thereby starting the use of the filter 100. Immediately after, the amount of the first active ingredient V released is smaller than that of the conventional filter 200. Further, since the release of the first active ingredient V from the inner side of the hole 2 is suppressed for a long time, the first active ingredient V remains on the inner side of the hole 2 even after a predetermined time has elapsed. The release is continued. The second active ingredient C is not adsorbed on the inner side of the pore 2, but since the molecular weight is relatively large and the volatility is slow, the release is continued even after a predetermined time has elapsed.

Next, it can be seen in FIGS. 3 and 4 that the release amount of the first active ingredient V and the release amount of the second active ingredient C derived from the second particle 10 in the present embodiment do not fluctuate significantly over time. This will be described using a graph.

The measurement of the release amount of the first active ingredient followed the method shown in the conventional example.

The amount of the second active ingredient C released was measured as follows. That is, the second particle 20 carrying the first active ingredient V and the second active ingredient is attached to the filter medium 101 (a dust collecting filter 100 is prepared), and the upstream of the test apparatus configured to allow air to pass through the filter medium 101. Installed on the side. The area of the test piece was 0.3 m2. A blower arranged on the downstream side of the dust collection filter 100 was operated, air was passed through the dust collection filter 100, and air containing the second active ingredient V discharged from the test apparatus was bubbled in the chemical solution. At this time, for example, when collecting data with a blowing time of 100 hours, the blower is first operated for 100 hours (air temperature is about 25 ° C., air volume is 200 m3 / Hr), and then bubbling with the chemical solution for only 3 hours. It was. The air temperature and air volume during bubbling are the same as those during 100-hour ventilation. The drug solution contains a Coomassie blue pigment. In the chemical solution, Coomassie blue and protein are combined by bubbling with air containing the second active ingredient C (collagen), and the maximum absorption wavelength changes (changes from brown to blue). Taking advantage of this, the degree of discoloration of the chemical solution bubbling for 3 hours was measured with a spectrophotometer to investigate the amount of the second active ingredient C released from the dust collection filter 100.

The values shown by Vmix in FIGS. 3 and 4 are the release amount and the rate of change of the release amount with respect to the first active ingredient V of the present embodiment. Immediately after the start of use, it was 0.077 ppm, and after using 500 hours, it decreased but remained at 0.053 ppm. According to FIG. 4, after using 500 Hr, the decrease of Vmix is only about 70% compared to immediately after the start of use, and the change in the amount released is suppressed.

The values shown by Cmix in FIGS. 3 and 4 are the release amount and the rate of change of the release amount with respect to the second active ingredient C of the present embodiment. Immediately after the start of use, it was 0.133 ppm, and after using 500 Hr, it decreased but remained at 0.085 ppm. According to FIG. 4, after using 500 Hr, the amount of Vmix decreased by only about 65% compared to immediately after the start of use, and the change in the amount released was gradual.

By the way, as shown in FIG. 3, the amount of the first active ingredient Vmix derived from the second particle 20 is smaller than that of the first active ingredient Vsolo derived from the first particle 10 throughout the usage time. Therefore, if the second particle 20 is simply attached to the filter medium 101, the rate of change in the amount of the first active ingredient V released is suppressed, but a sufficient effect cannot be obtained. Therefore, as shown in FIG. 1B, the present embodiment employs a configuration in which both the first particle 10 and the second particle 20 are attached to the filter medium 101.

FIG. 5 is an example of the present embodiment, and is a measurement result of the emission amount of the dust collecting filter 100'in which the second particle 20 having the same amount (weight) as the first particle 10 is attached to the filter medium 101. The double line indicated by VINv is the total value of the first active ingredient V emitted from both the first particle 10 and the second particle 20, and the dotted line indicated by CInv is the second effective value emitted from the second particle 20. It is a value of the component C. The amount of the first active ingredient VINv released is 0.135 ppm immediately after the start of use of the dust collecting filter 100', and 0.073 ppm after the elapse of 500 hours. As described above, the amount of the first active ingredient VInv released is larger than the value of the first component Vmix derived only from the second particle 20 shown in FIG. The amount of release is large, the release rate after 500 hours has been maintained at about 55%, and the attenuation of the amount of release is delayed.

By adhering the first particles 10 and the second particles 20 to the filter medium 101 in this way, it is possible to prevent an extreme decrease in the amount of the first active ingredient released, and for a predetermined time immediately after the start of use of the dust collecting filter. The rate of change in the amount of release until the lapse of time can also be reduced. The blending ratio of the second particle 20 to the first particle 10 is, for example, the same amount, but may be changed as appropriate. In this case, the ratio of the first particle 10: the second particle 20 is preferably in the range of 2: 8 to 8: 2. The effect of preventing an extreme decrease in the amount of the first active ingredient released and the effect of reducing the rate of change in the amount of release from immediately after the start of use of the dust collecting filter to the elapse of a predetermined time can be obtained in a well-balanced manner. ..

The vehicle air conditioner according to the present invention is an invention that can be industrially manufactured and can be industrially used with economic value because it can be the subject of commercial transactions.

1 Ceramic particles 2 Holes 10 1st particles 20 2nd particles 100, 100', 200 Dust collection filter 101 Filter medium V 1st active ingredient (vitamin C derivative)
C 2nd active ingredient (collagen)

Claims (2)

In a filter installed in the air passage of a vehicle air conditioner and impregnated with particles carrying volatile components.
The particles are
The first particle (10) carrying the first active ingredient (V) having a relatively small molecular weight, and
The second particle (20) on which the first active ingredient (V) and the second active ingredient (C) having a relatively large molecular weight are supported, and
Filters (100, 100') for vehicle air conditioners. The first active ingredient (V) contains a vitamin C derivative and contains
The filter (100, 100') for a vehicle air conditioner according to claim 1, wherein the second active ingredient (C) contains collagens.

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