JPH0331484B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention has an indicator that displays the degree of dirt on a filter, and is used for household use to purify the air inside a room or a car by removing dust, dust, odor, etc. from the air. It relates to air purifiers for automobiles and the like.

[Background Art] Conventionally, Japanese Patent Laid-Open No. 59-217430 discloses an indicator for indicating the degree of contamination of the filter in a household air purifier having an indicator for indicating the degree of contamination of the filter. Something like that was hot. In other words, a window was opened in the front cover of the air purifier, and the purification filter inside was exposed through this window. This is because the internal filter is directly visible through the window, so if the filter becomes dirty from using an air purifier, the dirt will be directly visible, which is unsightly and creates a feeling of discomfort.

[Object of the Invention] The present invention has been provided in view of the above-mentioned points, and provides an air purifier whose purpose is to improve the appearance by making the degree of dirt on the indicator invisible. be.

[Disclosure of the Invention] (Structure) The present invention provides a grill having a filter block for purifying air taken in through a suction hole, a bell mouth having one side of the grill attached and a suction hole on the other side, and a bell mouth. In an air purifier comprising a mouse and a fixed housing that sucks air into a wind tunnel casing through an intake hole and discharges purified air from an outlet, the grille is provided with a housing that is fixed to the housing, which sucks air into a wind tunnel casing through an intake hole, and discharges purified air from an outlet. An auxiliary suction hole for blowing air into the auxiliary suction air passage is provided in the auxiliary suction air passage, an indicator for checking when to replace the filter block is removably attached to the inside of this auxiliary suction hole, and a suction opening is installed in the auxiliary suction air passage inside this indicator. The auxiliary suction hole is offset from the auxiliary suction hole in a direction orthogonal to the front-rear direction, so that the auxiliary suction hole on the outside of the indicator and the suction opening on the inside of the indicator are offset. , the degree of dirt on the indicator is not directly visible from the outside.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
FIG. 6 shows a perspective view of the air purifier seen from the front, FIG. 7 shows a perspective view of the air purifier from the back, and FIG. 8 shows a cross-sectional view. The air purifier of the present invention can be broadly divided into air purifiers that inhale air and filter blocks.
Grill 1 that is cleaned by FB and bell mouth 2 that inhales and guides the purified air from grill 1
Then, the air sucked from Bell Mouth 2 is sent to the motor,
It is composed of a housing 3 that discharges air using a fan or the like.

Starting with the grill 1 placed on the front of the air purifier, the grill 1 has the following configuration. 6 to 11, as shown in FIGS. 8 and 9, a lattice portion 1a with a horizontal striped lattice is formed on the front surface of the grille 1, and at the same time, a lattice portion 1a having a horizontal striped lattice is formed on the front surface of the grille 1. A suction hole 1b for sucking air is formed. On the back of grill 1 is the
As shown in Figure 0, a filter block FB is housed. That is, the entire circumferential rib 8 that is integrally formed rearward on the back surface of the grill 1 is used as a filter storage section 8a for storing the filter block FB. A dust removal filter 5 and deodorizing filters 6 and 7 which are folded into bellows are housed in this filter storage portion 8a from the front side, starting from the pre-filter 4. This filter block FB is fixed to the grill 1 by holding down the deodorizing filter 7 from the back side as shown in FIG. 11 using a narrow strip-shaped filter holding tool 9. As shown in FIG. 10, a horizontal striped lattice is formed only on the back side of the grill 1 within the circumferential rib 8 where the filter block FB is arranged, and there is a vent hole 1b that inhales air only in the portion within the circumferential rib 8. has been established. The front side of the other parts also has a lattice formation, but it is not a through lattice. There is a filter block approximately in the center on both sides of the rib 8 around the entire circumference of the grill 1.
Notch 1 with rear opening as FB removal part
0 is formed. Further, an indicator 11 shown in FIGS. 9 and 10 is provided at the end of the upper surface of the grill 1.
A square hole 12 is formed to house the indicator 11, and the indicator 11 is housed in a box-shaped housing portion 13 through the square hole 12.

Next, the indicator 11 to storage section 13, which are the gist of the present invention, will be explained. As shown in FIGS. 1 and 2, the storage section 13 in the upper part of the grill 1
A lattice portion 1a is formed on the front surface of the grille 1 in the same manner as the front surface of the grill 1, and a plurality of auxiliary suction holes 81 for sucking air are perforated vertically on both sides of the lattice portion 1a in addition to the ventilation holes 1b. The other portion is a shield 82 that does not penetrate. As shown in FIGS. 4 and 5, the indicator 11 stored in the storage portion 13 has an approximately triangular upper portion and a square frame-shaped lower portion. A recess 83 is formed in the front of the upper part of the indicator 11, and this recess 8
3 and insert the indicator 11 into the storage part 13.
It can be attached and detached at will. A portion of the indicator 11 whose front side is closed by a wall 84 is a filter housing portion 11a, and an indicator filter 85 is housed within this filter housing portion 11a. Further, a hole 84 is provided approximately in the center of the wall body 84.
A is perforated. As shown in FIG. 4, indicator stickers 86 are pasted on the front of the wall 84, with the color of the room where people smoke a lot on the left and the color of the room where they rarely smoke on the right. When the indicator filter 85 visible through the central hole 84a changes to these colors, the dust removal filter 5 also indicates that it is time to replace it.

Projections 87 are integrally formed on both sides of the indicator 11, and as shown in FIG.
The indicator 11 is fitted into the groove 88 formed on the side wall of the storage section 13 to prevent the indicator 11 from coming off, and the air entering from the auxiliary suction hole 81 is sucked into the storage section 13.
The water flows out only from the suction opening 90 formed in the back plate 89 of the. This suction opening 90 formed in the back plate 89 of the storage section 13 is shown in FIG.
As shown in FIG. 2a showing a cross-sectional view and FIG. 2b showing a B-B cross-sectional view of FIG. It is formed in the position. That is, when viewed through the auxiliary suction hole 81, the indicator filter 85 and the suction opening 90 cannot be seen because they are offset.

An auxiliary suction air passage 91 formed between the auxiliary suction hole 81 of the grill 1, the inside of the storage section 13, and between the grill 1 and the bell mouth 2 is formed as shown in FIG.
The discharge side of this auxiliary suction air passage 91 communicates with a wind tunnel casing 50, which will be described later, and is blown out to the outside via the discharge port 41. However, grill 1
The air sucked in through the auxiliary suction hole 81 flows through the hole 84a of the indicator 11, the indicator filter 85, and the suction opening 90 of the storage portion 13. In this way, by arranging the indicator filter 85 in a parallel circuit to the dust removal filter 5 and the separate auxiliary suction air passage 91 in the grill 1, the pressure loss can be approximately the same as that of the dust removal filter 5. By setting the pressure loss of the indicator filter 85 and the size of the suction opening 90, the pressure loss of the dust removal filter 5 and the pressure loss of the filter portion of the indicator 11 can be made the same. Therefore, each time the air purifier is in use, the indicator 11 can be easily removed.
By comparing the degree of dirt on the indicator filter 85 visible through the hole 84a of the indicator 11 with the color of the indicator seal 86, it is possible to tell when it is time to replace the dust removal filter 5. Incidentally, the user sometimes takes out the indicator 11 from the main body and uses this indicator filter 8.
It is necessary to check the degree of dirt in 5. Also, grill 1
By simply changing the opening area of the suction opening 90 of the storage section 13, the dust removal filter 5 can be adapted to various types of pressure-loss products.

On both upper and lower sides of the circumferential rib 8 of the grill 1, first
As shown in FIG.
4 and L-shaped mounting portions 15 that face each other and protrude downward are formed, respectively. Hooks 16 are fixed to the upper portions of both sides of the grill 1 with tapping screws 18 via leaf springs 17. That is, as shown in FIG. 3, the hook 16 is disposed in a storage section 21 provided on the back side of the grill 1 so as to be movable laterally, and the hook 16 is inserted laterally through an elongated insertion hole 16a. A tapping screw 18 is screwed onto the grill 1 via a washer 19. Further, an engaging piece 16c is integrally formed inside the hook 16, and the engaging piece 16c is inserted into an engaging hole (not shown) formed in the bell mouth 2 and engaged. I have to. That is, in order to fix the grill 1 to the bell mouth 2, as shown in FIG.
4 into the engagement recess 25 formed on the lower upper surface of the bell mouth 2 from above, and then insert both hooks 1
6 inward to fit the grill 1 into the opening surface of the bell mouth 2, and then release the hook 16, the hook 16 returns to its original position due to the return force of the leaf spring 17, and the engaging piece 16c of the hook 16 engages the bell mouth 2. The grille 1 is engaged with the matching hole, and the grille 1 is fixed to the bell mouth 2.

Next, the bell mouth 2 will be explained. As shown in FIGS. 8 and 12, the top surface of the bell mouth 2 is a sloped surface 26 that slopes toward the front side, and the top surface of the indicator 11 is also a sloped surface corresponding to this slope 26. . A switch operation part 27 is formed on the inclined surface 26 of the bell mouth 2, and this switch operation part 27 has a so-called tact switch configuration, and allows turning on/off the air volume and switching the timer by just touching it lightly. The printed board stand 28 that constitutes the switch operating section 27 is fixed to the boss part of the housing 3 with screws at three points. Fixed. A tact switch 31, a light emitting diode, and other electronic components are mounted on the printed board 29.
The printed board stand 28 is held down by a part of the bell mouth 2, and the switch operation part 27 is held down by a part of the bell mouth 2.
It is composed of a molded spring 33 that is integrally molded, and the tactile switch 31 on the printed board 29 can be turned on and off by pressing it from above. In addition, the molded product spring 33 of the bell mouth 2
A switch nameplate 34 is attached to the top surface of the switch using a polyester film sheet.

As shown in FIG. 12, two engaging recesses 25 are formed in the lower surface of the bell mouth 2, into which the engaging pieces 24 of the grille 1 are inserted. A bell mouth 2 has a suction port 35 facing a fan of a housing 3, which will be described later.
As shown in FIG. 8, a lattice 36 is formed radially on the front side of the suction port 35 and is integrally formed with the bell mouth 2. Also, this grid 3
6, a plurality of circular lattices 37 whose height is lower than that of the lattice 36 are integrally formed. This grid 37 prevents fingers from entering. The deodorizing filter 7 is in contact with the radial lattice 36, and the deodorizing filter 7 is not in contact with the circular lattice 37, so that a gap is created. The opening of the bell mouth 2 is a grill storage section 38, and a rib 39 is integrally formed around the entire circumference of the grill storage section 38. The height of the rib 39 is the same as the height of the grid 36, and the rib 39 allows the grill 1 to be stored in the grill storage portion 38.
Press the entire circumference of the back of the filter block FB of grill 1, and press the filter block FB of grill 1.
and Bellmouth 2 to ensure airtightness. Also,
Ribs 40 are formed integrally with the ribs 39 at the same height and in the same direction as the radial lattice 36. In such a configuration, the ribs 39 are provided around the entire circumference of the grill storage section 38, so that when the fan rotates, the air flow is directed from the ventilation holes of the grid section 1a of the grill 1 to the prefilter 4 and the dust removal section. Through filter 5 and deodorizing filters 6 and 7,
Air is blown out from the suction hole 35 of the bell mouth 2 through the air passage of the housing 3 by the force of the centrifugal fan, and from the discharge port 41.

Next, the housing 3 to which the bell mouth 2 is attached
I will explain about it. 8 and 13, first, a discharge port 41 is provided in the upper part of the housing 3. As shown in FIG. Inside the housing 3, the motor 4
2 is fixed to the motor fixing plate 45 on the back side of the housing 3 with screws 46 in a manner such that the back plate 3a of the housing 3 is sandwiched between the three fixing parts of the motor bracket using vibration isolating rubber 43 and a sleeve 44. There is. A fan 47 located within the housing 3 is screwed and fixed to the rotor 42a of the motor 42. Further, from the housing 3, a peripheral wall 51 of a molded product constituting the wind body casing 50 is formed in an Archimedean spiral shape, and the bell mouth 2, the printed board stand 28, and the peripheral wall 51 are formed to have an Archimedean spiral shape.
and constitute a wind tunnel casing 50. The above-mentioned discharge port 41 is formed in a part of this wind tunnel casing 50.

By the way, when operating an air purifier, there are "strong" and "weak" settings.
In the case of "weak" operation, a voltage dividing resistor is connected in series with the motor 42. Since the voltage dividing resistor generates heat, the voltage dividing resistor is fixed to a fixed plate that also serves as a heat sink. A voltage dividing resistor block 52 consisting of this voltage dividing resistor 53, etc.
A part of the peripheral wall 51 of the wind tunnel casing 50 closest to the lead wire 58 of the motor 42 attached to the housing 3 is cut out and disposed there. That is, as shown in FIG. 13, the voltage dividing resistor block is placed in the wind tunnel casing 50 facing the fan 47 on the side of the air passage from the bent portion 50a of the wind tunnel casing 50, with the fixed plate 54 of the voltage dividing resistor block 52 facing the air passage. 52 are arranged. Between the lead wire 58 of the motor 42 and the wind tunnel casing 50, in order to facilitate wiring of the lead wire 58 of the motor 42,
As shown in FIG. 13, a groove 60 is provided with ribs 59 on both sides.

Motor fixing plate 45 for fixing the motor 42
are disposed flush with the back surface of the back plate 3a of the housing 3. That is, as shown in FIGS. 7 and 8, a rectangular recess 64 recessed toward the front side is integrally formed in the center of the back plate 3a of the housing 3, and a recess is further formed around this recess 64. Stepped portion 65
is formed, and the motor fixing plate 4 is placed inside this recessed step 65.
5 is disposed flush with the back surface of the back plate 3a using the screws 46. As shown in FIG. 7, the motor fixing plate 45 is formed into a rectangular plate shape, with a notch 45b opening in the center, and a holding piece 45a integrally formed so as to protrude into the notch 45b. There is. Furthermore, three screw holes are formed around the notch 45b into which screws 46 for fixing the motor 42 are screwed. This holding piece 45a is located corresponding to the recess 64 of the housing 3.

Holding piece 4 formed on the motor fixing plate 45
Reference numeral 5a is used to hang and fix the air purifier on a wall, and the motor fixing plate 45 is inserted and locked into a substantially U-shaped fixture that is attached to the wall with the air purifier upside down. and install it. At this time, a drawstring 72 is used for operation, and the drawstring 72 is normally attached by press-fitting its knob 73 into a recess 74 formed on the back of the housing 3, as shown in FIG. are doing. This is the drawstring 7
To prevent the knob 73 of No. 2 from hanging out and getting in the way when the air purifier is used in a stationary position,
is stored on the back side of the housing 3. Note that when the knob portion 73 is housed in the recess 74, it is prevented from protruding from the back surface of the housing 3. Further, the tip of the drawstring 72 is connected to an arm 70 that drives the switch operating section 27.

[Effects of the Invention] As described above, the present invention includes a grill having a filter block for purifying the air taken in through the suction hole, and a bell mouth having the grill attached to one side and having the suction hole on the other side. In an air purifier equipped with a bell mouth and a fixed housing that sucks air into the wind tunnel casing from an inlet and discharges purified air from an outlet, an air purifier is provided that is separate from the inlet to the filter block of the grille. An auxiliary suction hole is provided in the grille to send air to the auxiliary suction air passage, and an indicator for checking when to replace the filter block is removably attached to the inside of this auxiliary suction hole, and air is drawn into the auxiliary suction air passage inside this indicator. Since the opening is provided offset from the auxiliary suction hole in a direction perpendicular to the longitudinal direction, the auxiliary suction hole on the outside of the indicator and the suction opening on the inside of the indicator are Because it is offset, the degree of dirt on the indicator cannot be directly seen from the outside through the auxiliary suction hole, which improves the appearance and has the effect of not causing discomfort like in the past. .

[Brief explanation of the drawing]

FIG. 1 is a front view of essential parts of an embodiment of the present invention, FIG. 2a is a sectional view taken along line AA in FIG. Figure 3 is a rear view of the main parts of the same as above, Figure 4 is a perspective view of the indicator of the same as above,
Figure 5 is an exploded perspective view of the same indicator as above;
The figure is a perspective view of the air purifier same as the above, Fig. 7 is a perspective view of the air purifier seen from the back side of the same as the above, Fig. 8 is a sectional view of the same as the above, Fig. 9 is an exploded perspective view of the same as the above, and Fig. 10 is the same as the above.
11 is a perspective view of the same as the above, FIG. 12 is a perspective view of the same with the grill removed, and FIG. 13 is a front view of the housing of the above. 1 is the grill, 1b is the intake hole, 2 is the bell mouth,
3 is a housing, 11 is an indicator, 35 is a suction hole, 81 is an auxiliary suction hole, 90 is an auxiliary suction opening, and 91 is an auxiliary suction air passage.

Claims (1)

[Claims] 1. A grill having a filter block that purifies the air taken in through the suction hole, a bell mouth that is attached to one side of the grill and has a suction hole on the other side, and a wind tunnel casing that is fixed to the bell mouth and draws air from the suction hole. In the air purifier, the housing includes an auxiliary suction hole that blows air into the auxiliary suction air passage in the grille, in addition to the suction hole to the filter block of the grille. An indicator for checking when to replace the filter block is removably attached to the inside of this auxiliary suction hole, and a suction opening is attached to the auxiliary suction air passage inside this indicator, and the suction opening is located in the front and rear direction from the auxiliary suction hole. An air purifier characterized in that it is provided offset in a direction orthogonal to the air purifier.