JP2005098657A - Air conditioner and its filter unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner and its filter unit capable of improving the heat exchanging efficiency of an evaporator without accompanying the substantial design change of the air conditioner by selectively using filters of various ventilating resistances at each place. <P>SOLUTION: In this air conditioner provided with a blower 43, the evaporator 44 and the filter 14 mounted at an upstream side of the evaporator in an air passageway 13, the filter of high ventilating resistance is used at a part of high flow rate, and the filter of low ventilating resistance is used at a part of low flow rate, in accordance with the flow rate of the air on a filter face of the filter. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an air conditioner equipped with a filter for air purification. In particular, the present invention relates to an air conditioner that increases the heat exchange rate of an evaporator.

  In the conventional air conditioner, due to a demand for downsizing of the air conditioner, the shape of the air passage is changed, such as a location where the air passage forming the air flow is bent or a location where the cross-sectional area is changed. (For example, refer to Patent Document 1). Thus, in the part accompanied by the shape change of the air passage, the flow velocity distribution in the air passage cross section of the air flow velocity is disturbed.

  In particular, the cross-sectional area of the air passage is increased immediately before the evaporator that is disposed in the air passage and cools the air. This is to increase the heat exchange rate by slowing the flow velocity of the air flow and increasing the chance of contact with the radiator fins. However, since there is a difference in the cross-sectional area of the air passage, the difference in the flow velocity between the portion where the air flow blown from the air passage having a small cross-sectional area reaches the evaporator at the shortest distance and the portion where the air flow is not so large is extremely large. Considering the heat exchange rate of the evaporator, it is desirable that an air flow with a uniform flow velocity hits the entire surface of the evaporator.

Therefore, it is desired to develop an air conditioner that increases the heat exchange rate of the evaporator by applying an air flow having a uniform flow velocity to the entire surface of the evaporator.
JP-A-11-170840

  Therefore, in the present invention, a filter having a different ventilation resistance depending on the location can be used, and an air flow having a substantially uniform flow velocity can be applied to the entire surface of the evaporator, and the evaporator can be operated without a significant design change of the air conditioner. The purpose is to propose an air conditioner with an increased heat exchange rate. In addition, the filter can be used and mounted in an air conditioner to apply an air flow with a substantially uniform flow velocity over the entire surface of the evaporator, and the heat exchange rate of the evaporator can be increased without significant design changes of the air conditioner. The object is to propose a filter unit that can be enhanced.

  The inventors can change the ventilation resistance of the filter depending on the location, for example, by changing the interval between adjacent peaks of the pleats of the filter, and make the flow velocity of the air flow after passing through the filter uniform. I found out that I can. Here, the crest interval between adjacent crests refers to the interval between the pleat crease on one filter surface of the filter and the crease adjacent thereto. Hereinafter, it is simply referred to as “mountain interval”.

  In order to solve the above problems, an air conditioner according to the present invention includes a blower that forms an air flow in an air passage that forms an air flow from an air intake port toward a purified air discharge port, an evaporator, and the evaporator. In the air conditioner including the filter disposed on the upstream side of the filter, in accordance with the flow velocity of the air flow on the filter surface of the filter, the portion where the flow velocity is high sets the ventilation resistance of the filter high, and the flow velocity is The slow part is characterized in that the ventilation resistance of the filter is set low.

  According to the above invention, air flow disturbance at a place where the shape change of the air passage occurs is alleviated, and an air flow having a substantially uniform flow velocity distribution is applied to the entire surface of the evaporator without significant design change of the air conditioner. Can do.

  In the air conditioner, the filter is a pleated filter, and the ventilation resistance is set high by widening the crest between adjacent pleats, and the ventilation resistance is set low by reducing the crest spacing. It is desirable to do.

  A specific method is proposed in which the ventilation resistance of the filter varies depending on the location.

  In the air conditioner, it is preferable that the blower is disposed in the air passage upstream of the filter.

  The disturbance of the air flow due to the change in the cross-sectional area of the air passage at the joint between the blower housing having the blower and the cooler housing having the evaporator can be alleviated, and an air flow having a substantially uniform flow velocity distribution can be applied to the entire surface of the evaporator.

  In the air conditioner, in the filter surface of the filter, the peak interval in the filter region where the air flow blown from the blower reaches the shortest distance is made wider than the peak interval in the filter surface other than the filter region. It is desirable.

  In the filter area where the air flow blown out from the blower reaches the shortest distance and the other filter surfaces, the difference in the flow velocity of the air flow is significant, so an index for setting the mountain interval is proposed.

  Further, in the air conditioner, the position of the valley of the pleat of the filter is fixed with a plurality of pins arranged on the inner wall of the air passage, and a peak interval between adjacent peaks of the pleat of the filter is set to a predetermined value. It is desirable to set the interval between peaks.

  By arranging the pins with the arrangement interval set in advance, the crest interval can be easily set when the filter is arranged in the air passage even if a filter only processed into a pleat shape is used.

  The filter unit according to the present invention includes a filter frame, a filter processed into a pleat shape that is locked to the filter frame, and a pleat of the filter adjacent to each other with the filter locked to the filter frame. And a crest interval setting means for setting a crest interval between the crests, wherein the filter has a narrow portion and a wide portion.

  The filter unit according to the present invention includes a filter frame, a filter processed into a pleat shape that is locked to the filter frame, and a phase of the pleats of the filter in a state where the filter is locked to the filter frame. A filter unit that is disposed in an air passage of an air conditioner that forms an air flow, and the filter unit is disposed in the air passage. Occasionally, according to the flow velocity of the air flow on the filter surface of the filter, the crest interval is set so that the portion where the flow velocity is fast is wide and the portion where the flow velocity is slow is narrow.

  By mounting the filter unit in the air conditioner according to the above invention, the disturbance of the air flow at the place where the shape change of the air passage occurs is alleviated, and the entire surface of the evaporator is not accompanied by a significant design change of the air conditioner. An air flow having a substantially uniform flow velocity distribution can be applied.

  The said filter unit WHEREIN: The said crest interval setting means fixes the position of the pleat trough of the said filter with the some pin arrange | positioned the said crest interval on the inner wall of the said filter frame, The invention which concerns on the said filter unit is described. It is desirable to use a means for setting the crest interval.

  By arranging the pins with the arrangement interval set in advance, the crest interval can be easily set when the filter is locked to the filter frame.

  In the filter unit, it is preferable that a restriction member is provided on the filter frame that determines a direction of the filter unit with respect to a filter unit insertion port provided on a wall of the air passage.

  In the process of arranging the filter unit in the air passage, by preventing the filter unit from being inserted into the filter unit insertion port other than in a specific direction, the filter unit can always be arranged in a specific direction, and the filter replacement work can be performed. It can be smooth.

  In the air conditioner of the present invention, an air flow having a substantially uniform flow velocity can be applied to the entire surface of the evaporator by using filters having different ventilation resistances depending on the location. Therefore, the heat exchange rate of the evaporator can be increased and energy saving can be achieved without a significant design change of the air conditioner. Moreover, it is economical because only the filter can be replaced.

  Moreover, in the filter unit of the present invention, an air flow having a substantially uniform flow velocity can be applied to the entire surface of the evaporator by being mounted on the air conditioner. Therefore, the heat exchange rate of the evaporator can be increased and energy saving can be achieved without a significant design change of the air conditioner. Moreover, it is economical because only the filter can be replaced.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. However, the present invention is not construed as being limited to these descriptions.
(Embodiment 1)

  FIG. 1 is a schematic view showing an HVAC unit of a vehicle air conditioner that is an embodiment of the air conditioner of the present invention. The HVAC unit 100 has an air intake port 40 and a purified air discharge port (not shown), and switches the main body case 51 that forms the air passage 13 and the intake of vehicle interior air or vehicle exterior air into the air passage 13. According to the present embodiment, the air intake door 45, the blower 43 disposed in the air passage 13 and forming the air flows 60a, 60b, 60c and 60d in the air passage 13, and the air flowing in the air passage 13 are purified. Filter 14, evaporator 44 that forms part of the refrigeration cycle, cools air, heater core (not shown) that heats air, and air mix door (not shown) that changes the mixing ratio of cooling air and heated air With.

  The main body case 51 defines a space surrounded by the main body case 51 as the air passage 13. Further, the main body case 51 is provided with an outside air introduction port 41 for taking in outside air as an air intake port 40 and an inside air introduction port 42 for taking in air in the vehicle interior. In the main body case 51, a part for housing the blower 43 is a blower housing 48, and a part for housing the evaporator 44 is a cooler housing 49.

  The intake door 45 switches intake of the vehicle interior air and the vehicle exterior air by switching the opening between the outside air introduction port 41 and the inside air introduction port 42.

  The blower 43 is connected to a blower motor 47 and is housed in a blower housing 48. The blower 43 is rotated by a blower motor 47. When the blower 43 is rotated, an air flow 60a from the outside air introduction port 41 or the inside air introduction port 42 is formed in the air passage 13, and the filter 14 on the downstream side of the blower 43 is formed as an air flow 60b. Send air to. Further, air is sent to the evaporator 44 as an air flow 60c. Examples of the blower 43 include a centrifugal sirocco blower and a turbo blower.

  The evaporator 44 is housed in the cooler housing 49 together with the filter 14. The evaporator 44 cools the air sent from the upstream side of the evaporator 44 as the air flow 60c by heat exchange. The cooled air passes through the evaporator 44 and becomes an air flow 60d.

  Part of the air that has passed through the evaporator 44 is guided to a heater core (not shown) and heated. Thereafter, the cooling air and the heated air are mixed by an air mix door (not shown), adjusted in temperature, passed through a duct (not shown), a vent outlet (not shown) as a purified air outlet, and a side vent outlet ( It is discharged into the vehicle compartment from a soft diffusion outlet (not shown) or a foot outlet (not shown).

  Next, the filter 14 will be described. In the present embodiment, the filter 14 processed into a pleat shape is disposed upstream of the evaporator 44. At this time, one of the filter surfaces of the filter 14 is set to receive the air flow 60b. By arranging the filter 14 at this position, it is possible to apply an air flow 60c having a substantially uniform flow velocity distribution to the evaporator 44. This effect will be described later. In the HVAC unit 100 shown in FIG. 1, the blower 43, the filter 14, and the evaporator 44 are arranged in the air passage 13 in this order, but may be arranged in the order of the filter, the evaporator, and the blower.

  Further, a member that does not significantly hinder the air flow 60c such as the photocatalytic light source 31 that activates the photocatalyst may be provided between the filter 14 and the evaporator 44.

  In addition, in the air conditioner according to the present embodiment, filter 14 that is only processed into a pleat shape is used. Therefore, by folding the filter 14, the bulk of the filter 14 can be extremely reduced, and many filters 14 can be packed at the same time without being bulky during transportation, which is economical.

  The filter 14 may be composed of only a dust collection filter that collects air passing through the filter 14, or may be a combination of a dust collection filter that collects dust and a deodorization filter that performs deodorization. In the present embodiment, when the filter 14 exhibits the dust collection function and the deodorization function, the filter 14 is processed into a pleated shape and the deodorization filter is processed at substantially the same mountain interval as the dust collection filter 25a and carries the photocatalyst. The filter 25b can be superposed, and the thickness when the filter 14 is installed is reduced, leading to space saving. At this time, it is desirable that the dust collection filter 25a and the deodorization filter 25b are overlapped in this order with respect to the direction of the air flow 60b. The dust collection filter 25a and the deodorization filter 25b are overlapped in this order because the dust passing through the filter 14 is first collected by the dust collection filter 25a and then deodorized by the deodorization filter 25b. This is because deodorizing efficiency is better than deodorizing the air, and the life of the deodorizing filter can be extended. Examples of the dust collection filter 25a include a non-woven fabric made of synthetic fiber such as filter paper made of pulp and polyethylene fiber, and a non-woven fabric made of dielectric fiber such as polypropylene. Moreover, as a method of manufacturing the dust collection filter 25a and the deodorizing filter 25b, for example, a method of cutting a pleated nonwoven fabric into a predetermined size can be exemplified, and the cost can be reduced. In addition, you may use the deodorizing filter which carry | supported the photocatalyst, In this case, the photocatalyst light source 31 which activates a photocatalyst is used simultaneously.

  The photocatalytic light source 31 activates a photocatalyst such as titanium dioxide supported on the deodorizing filter 25b by ultraviolet rays generated by the photocatalytic light source 31, and decomposes odorous substances such as exhaust gas and cigarettes captured by the deodorizing filter 25b. Therefore, it is desirable that the photocatalytic light source 31 be provided at a position where the entire filter surface of the deodorizing filter 25b that constitutes the filter 14 together with the dust collection filter 25a can be irradiated with light. That is, it is desirable to provide a straight tubular photocatalytic light source 31 in a direction crossing the pleat fold of the filter 14. The photocatalytic light source 31 may be provided at either the center or the end of the filter surface of the filter 14, but is preferably provided at the corner of the end of the filter surface that does not inhibit the air flow 60c. In FIG. 1, only one straight tubular photocatalytic light source 31 is shown, but two or more straight tubular photocatalytic light sources 31 may be provided. Further, a reflector (not shown) may be provided on the downstream side of the photocatalytic light source 31 in order to efficiently irradiate the light generated by the photocatalytic light source 31 to the deodorizing filter 25b. The photocatalytic light source 31 may be an ultraviolet lamp such as a xenon lamp or a black light, or a light source that generates ultraviolet light such as an ultraviolet LED. At this time, the shape of the ultraviolet lamp as the photocatalytic light source 31 is preferably a straight tube shape, but may be a ring shape, a planar shape, or the like. Moreover, you may use as a photocatalyst light source 31 what arrange | positioned several ultraviolet LED in shapes, such as a linear form, a ring shape, and planar shape, on a board | substrate.

  In the present embodiment, the ventilation resistance of the filter in the portion where the flow velocity of the air flow 60b on the filter surface of the filter 14 is fast is set high, and the ventilation resistance of the filter in the portion where the flow velocity of the air flow 60b is slow is set low. In this way, by providing the distribution of the airflow resistance of the filter, the disturbance of the air flow 60b in the place where the shape change of the air passage 13 occurs is mitigated, and the air flow having a substantially uniform flow velocity distribution over the entire surface of the evaporator 44. 60c can be applied. When the filter is a pleated filter like the filter 14, as shown in FIG. 1, each part of the filter is changed by intentionally changing the crest interval 22 between adjacent crests of the filter 14 without making it constant. The ventilation resistance is adjusted to a desired ventilation resistance. As shown in FIG. 1, when the cross-sectional area of the air passage 13 changes on the upstream side of the evaporator 44, the air flow in the filter region 29 where the air flow 60b blown out from the air passage 13 having a small cross-sectional area reaches the shortest distance. The flow rate of 60b is faster than the flow rate at the other filter surfaces. Therefore, according to the flow velocity of the air flow 60b on the filter surface, the peak interval 22 is set wide for the high flow velocity portion, and the peak interval 22 is set narrow for the slow portion.

  In the HVAC unit 100 shown in FIG. 1, the blower 43, the filter 14, and the evaporator 44 are arranged in this order in the air passage 13. However, even if the filter, the evaporator, and the blower are arranged in this order, the main body case A change in the cross-sectional area of the air passage 13 due to a change in the shape of 51 may occur. In such a case, since the flow velocity distribution is likely to occur, the effect of the present invention that the air flow having a substantially uniform flow velocity distribution can be applied to the entire surface of the evaporator is sufficiently exhibited.

  Here, as described above, the peak interval 22 between adjacent peaks refers to the interval between the pleat fold 23 on one filter surface of the filter 14 and the adjacent fold. The size of the interval 22 is, for example, an average peak interval obtained by taking a unit length in the pleat folding direction of one filter surface and dividing the length by the number of pleat folds per length. It is good. This is because an attachment error of the filter 14 is taken into consideration. At this time, it can be said that the greater the number of folds of pleats per unit length, the narrower the crest interval.

  By intentionally changing the crest interval of the filter 14 without making it constant, the flow velocity of the air flow 60b after passing through the filter 14 can be changed. When the crest interval of the filter 14 is increased from a certain crest interval, the contact area between the air flow 60b and the filter surface decreases. Therefore, the ventilation resistance with respect to the air flow 60b of the filter 14 increases, and the flow velocity of the air flow 60c after passing through the filter 14 becomes slow. On the other hand, when the crest interval of the filter 14 is reduced from a certain crest interval, the contact area between the air flow 60b and the filter surface increases. Therefore, the ventilation resistance with respect to the air flow 60b of the filter 14 decreases, and the flow velocity of the air flow 60c after passing through the filter 14 increases.

  That is, the crest interval 22 is adjusted widely to set the ventilation resistance of the filter in the portion where the flow velocity of the air flow 60b on the filter surface of the filter 14 is high. On the other hand, the crest interval 22 is adjusted narrowly in order to set the ventilation resistance of the filter in the portion where the flow velocity of the air flow 60b is slow. As a result, the air flow 60c having a substantially uniform flow velocity distribution after passing through the filter can be applied to the evaporator 44, and the heat exchange rate of the evaporator 44 can be increased without significant design change of the air conditioner. In FIG. 1, the arrows indicating the air flows 60 b and 60 c schematically indicate the magnitude of the flow velocity of the air flows 60 b and 60 c with respect to the direction perpendicular to the filter surface of the filter 14.

  In this embodiment, the folding width of the pleats of the filter is set to be substantially constant, and the crest interval 22 is set to be wide at the high speed portion and narrow at the low speed portion according to the flow speed of the air flow 60b on the filter surface of the filter 14. Thus, the ventilation resistance of the filter differs depending on the location, but the form of the filter is not limited to this embodiment. For example, according to the flow velocity of the air flow on the filter surface of the filter processed into a pleat shape, the fold width of the pleat is shortened in the portion where the flow velocity is high, and the fold width of the pleat is increased in the slow portion. It is good also as the mountain interval of the mountains which fit. In this case, in the part where the folding width of the pleat is long, the contact area between the air flow and the filter becomes large, and the ventilation resistance can be set low. On the other hand, in the portion where the fold width of the pleat is short, the contact area between the air flow and the filter becomes small, and the ventilation resistance can be set high.

  A sponge-like filter may be used as the filter. Here, in FIG. 8, the schematic of 2nd Embodiment of a filter is shown. The filter 17 according to the second embodiment is disposed in the air passage 13 on the upstream side of the evaporator 44. At this time, the filter surface of the filter 17 is oriented to receive the air flow 60b.

  The filter 17 can be exemplified by a sponge in which a synthetic resin such as rubber or silicone is spongy. The portion where the flow rate is fast is thicker and the portion where the flow rate is slow is according to the flow rate of the air flow 60b on the filter surface of the filter 17. The thickness is reduced. When the thickness of the filter is increased, the distance that the air flow 60b passes through the filter becomes longer, so that the ventilation resistance of the filter can be set high. On the other hand, when the thickness of the filter is reduced, the distance that the air flow passes through the filter becomes shorter, so that the ventilation resistance of the filter can be set low. At this time, the thick part of the filter 17 may be crushed to make the apparent thickness of the filter 17 uniform. By making the apparent thickness of the filter 17 uniform, the space required for the arrangement of the filter 17 can be reduced.

  As shown in FIG. 1, when the blower 43 is provided upstream of the filter 14 according to the present embodiment, the cross-sectional area of the joint 50 between the blower housing 48 and the cooler housing 49 is the same as that of the cooler housing 49. It becomes smaller than the cross-sectional area. At this time, since the air flow 60b blown off at the boundary of the joint 50 part spreads, the flow velocity on the filter surface other than the filter region 29 where the air flow 60b reaches the filter surface of the filter 14 with the shortest distance is relatively slow. That is, in order to apply the air flow 60c having a substantially uniform flow velocity distribution to the evaporator 44, the peak interval 22 of the filter region 29 where the air flow 60b reaches the shortest distance is set to be relatively larger than the peak interval on the other filter surfaces. What is necessary is just to make it wide, and it becomes one design index.

  Further, there may be a flow velocity distribution in the air flow 60b even in the filter region 29. At this time, according to the flow velocity in the filter region 29, the portion where the flow velocity is fast is wide, the slow portion is narrow and the mountain interval 22 is set, so that the flow velocity distribution of the air flow 60c after passing through the filter 14 can be made substantially uniform. it can.

  Next, the arrangement of the filter 14 will be described. FIG. 2 is a schematic perspective view showing one form of the arrangement portion of the filter 14 of the HVAC unit 100 shown in FIG. FIG. 3 is a schematic cross-sectional view of the arrangement portion of the filter 14 shown in FIG. In the present embodiment, the arrangement portion of the filter 14 has a plurality of pins 20 a and 20 b provided on the inner wall of the air passage 13. In addition to this, leakage of the air flow 60b from the gap between the filter insertion port 15 for inserting and removing the filter 14, the lid 33 closing the filter insertion port 15, and the filter 14 and the inner wall of the air passage 13 is prevented. Protruding portions 19a and 19b to prevent may be provided. At this time, one pin 20 b is provided on the lid 33. Further, the protruding portion 19 b may be provided on the lid 33 or may be provided on the inner wall of the air passage 13. In the present embodiment, the filter case 15 is provided in the main body case 51 so that the filter 14 can be inserted and removed when the filter 14 is replaced, and the filter case 15 is closed by the lid 33. As long as 14 can be replaced, a part of the main body case 51 may be removed when the filter 14 is replaced.

  The filter insertion port 15 is provided in parallel to the folding direction of the filter 14, and the filter 14 can be slid from the filter insertion port 15 in the folding direction and disposed in the air passage 13.

  The protruding portion 19 a protrudes in a rib shape on the inner wall of the air passage 13, and prevents the air flow 60 b from leaking by eliminating the gap between the filter 14 and the inner wall of the air passage 13. At this time, the rib height of the protruding portion 19a is preferably as low as possible if the leakage of the air flow 60b can be prevented. The protruding portion 19b is the same as the protruding portion 19a.

  The plurality of pins 20 a are provided on the inner wall of the air passage 13, and substantially abut against the pleat valleys of the filter 14 to fix the positions of the valleys. Here, FIG. 3B is a schematic longitudinal sectional view of the filter arrangement portion shown in FIG. As shown in FIG. 3B, the pin interval 20 of the filter 14 can be set by fixing the position of the valley of the pleat with the pin 20 a. In FIG. 2, the pin 20a fixes the positions of all the pleat valleys, but any pin 20a may be omitted as long as the crest interval 22 can be set. Further, although the pin 20a fixes the pleat trough in parallel with the pleat crease 23, the pin shape may be hooked so that the pleat trough is fixed to the filter surface of the filter 14 in the vertical direction. . Moreover, you may use ultraviolet LED as the pin 20a, and it can replace with the photocatalyst light source 31 shown in FIG. By fixing in this way, the distance between the ultraviolet LED as the pin 20a and the filter surface is reduced, and the light irradiation efficiency to the filter surface can be increased. The pin 20b is the same as the pin 20a. Further, when the folding width of the pleats of the filter 14 is made constant, the thickness of the filter 14 increases as the crest interval 22 decreases. At this time, according to the thickness of the filter 14, the arrangement interval in the air flow direction between the pin for fixing the pleat valley and the pin for fixing the adjacent opposite valley may be wide. On the other hand, when the arrangement interval in the air flow direction between the pin that fixes the pleat valley and the pin that fixes the adjacent valley is fixed, the folding width of the pleat of the filter 14 and the pin that fixes the pleat valley What is necessary is just to make it the same length as the arrangement | positioning space | interval with the pin which fixes the adjacent facing valley. The pin 20b is the same as the pin 20a.

  In this manner, by setting the arrangement interval of the pins 20a and 20b in advance to the arrangement interval corresponding to the air conditioner, the mountain interval 22 can be easily set when the filter 14 is arranged in the air passage 13, and the filter 14 can be fixed between the pin 20a and the pin 20b. Further, it is economical because only the filter 14 can be replaced.

  FIG. 4 shows a schematic perspective view of the lid 33. The lid body 33 includes a plurality of pins 20b and a protruding portion 19b that prevents leakage of air flow, and a grip portion 34 may be provided in addition thereto.

  The grip portion 34 has a shape having a recess 38, and the lid 33 can be easily handled by hooking a finger on the recess 38.

  The plurality of pins 20b are provided on the back inner wall 35 of the lid 33, and face the pins 20a when the lid 33 closes the filter insertion port 15 shown in FIG.

  When arranging the filter 14 in the air passage 13, first, a pseudo filter member made of a hard material such as plastic having the same crest interval as the filter 14 having the crest interval 22 fixed is prepared. Next, the simulated filter member and the filter 14 are overlapped and inserted from the filter insertion port 15 so that the valley of the pleats is substantially in contact with the pin 20a. Thereafter, the filter 14 can be disposed in the air passage 13 by pulling out only the pseudo filter member and closing the filter insertion port 15 with the lid 33.

In the present embodiment, one filter 14 is arranged in the air passage 13, but the filter 14 may be divided and the divided filters 14 may be arranged side by side. For example, the filter 14 can be divided where the size of the peak interval 22 changes. Since the filter 14 according to the present embodiment is fixed by the pins 20a and 20b, the filter 14 can be arranged in the air passage 13 even if the filter 14 is divided.
(Embodiment 2)

  FIG. 5 is a schematic view showing an embodiment of the filter unit of the present invention. The filter unit 200 according to the present embodiment includes a filter frame 21, a filter 14 processed into a pleat shape that is locked to the filter frame 21, and the filter 14 in a state where the filter 14 is locked to the filter frame 21. Pins 20d and 20e are provided as peak interval setting means for fixing the peak interval 24 between adjacent peaks of the pleat.

  The filter 14 in the present embodiment uses the same filter as the pleated filter described in the first embodiment, and a description thereof will be omitted.

  Further, the pin 20d is disposed on the inner wall of the filter frame 21, and is the same as the pin described in the first embodiment. That is, the plurality of pins 20 d fix the position of the pleat valley of the filter 14, whereby the crest interval 24 of the filter 14 can be set. The pin 20e is the same as the pin 20d. Thus, by setting the arrangement interval of the pins 20d and 20e in advance to an arrangement interval corresponding to the air conditioner, the crest interval 24 can be easily set when the filter 14 is locked to the filter frame 21, and The filter 14 can be fixed between the pin 20d and the pin 20e. Further, it is economical because only the filter 14 can be replaced.

  Next, the filter frame 21 will be described with reference to FIGS. 5 and 6. FIG. 6 is a schematic cross-sectional view when the filter unit 200 shown in FIG. 5 is arranged in the air passage 13. FIG. 6A shows a schematic view when the filter unit 200 is disposed in the air passage 13, and the filter unit 200 is shown in a sectional view taken along the line BB in FIG. 5B. FIG. 6B shows a schematic view when the filter unit 200 is disposed in the air passage 13, and the filter unit 200 is shown in the AA cross-sectional view of FIG. As shown in FIG. 5, the filter frame 21 includes a filter frame upper portion 26a having a pin 20d, a filter frame lower portion 26b having a pin 20e, and a filter frame column that supports the filter frame upper portion 26a and the filter frame lower portion 26b so as to be fixed at a predetermined width. 27a and 27b. The filter 14 is locked between the filter frame upper part 26a and the filter frame lower part 26b.

  6B, when the filter unit 200 is disposed in the air passage 13, the filter frame column 27a substantially abuts against the inner wall of the air passage 13, and from the gap between the filter 14 and the inner wall of the air passage 13. Leakage of the air flow 60b is prevented. Therefore, as shown in FIG. 6B, it is desirable that the filter end 52a overlaps the filter frame column 27a. The filter frame column 27b is the same as the filter frame column 27a.

  As shown in FIG. 5B, the filter frame lower portion 26b has protruding portions 28b and 28c, and the filter frame upper portion 26a has a protruding portion 28a provided on the filter frame upper side surface 36b. In addition, as shown in FIG. 6A, the filter frame lower portion 26b may have a protruding portion 19d protruding in the direction of the filter frame upper portion 26a. The filter frame upper portion 26a may be provided with a protruding portion 19c protruding in the direction of the filter frame lower portion 26b. Furthermore, as shown in FIG. 5C, the filter frame lower portion 26b may be provided with a gripping portion 37 on the filter frame lower bottom surface 36a.

  The grip portion 37 has a shape having a recess 39, and the filter unit 200 can be easily handled by hooking a finger on the recess 39.

  When the filter unit 200 is disposed in the air passage 13, the protruding portion 19c prevents the air flow 60b from leaking from the gap formed between the filter 14 and the filter frame upper portion 26a. The protruding height of the protruding portion 19c is preferably as low as possible if the leakage of the air flow can be prevented. The protruding portion 19d is the same as the protruding portion 19c. The protruding portions 28a, 28b and 28c will be described later.

  Next, means for disposing the filter unit 200 in the air passage 13 will be described. FIG. 7 shows a schematic view of the filter unit insertion port 16 for arranging the filter unit 200 in the air passage 13. The filter unit insertion port 16 is provided in the wall of the air passage 13 on the upstream side of the evaporator 44. Moreover, the filter unit insertion port 16 has a shape having a recess 30 at one end. The filter unit 200 of the present embodiment is inserted from the filter unit insertion port 16 and is disposed in front of the evaporator 44 upstream of the air passage 13 of the air conditioner.

  As the filter 14 in the present embodiment, the same filter as the pleated filter described in the first embodiment is used. That is, when the filter unit 200 is arranged in the air passage 13, the arrangement direction of the filter 14 with respect to the air flow 60b and the setting of the peak interval 24 are the same as those of the filter in the first embodiment. Therefore, the direction of insertion of the filter unit 200 from the filter unit insertion port 16 must be determined. Therefore, the filter unit 200 may be inserted in consideration of the arrangement direction of the filter unit 200 in the air passage 13 each time. However, by inserting the filter unit 200 from the filter unit insertion port 16, the predetermined arrangement direction is naturally obtained. Thus, it is desirable to configure the filter unit 200. For example, what is necessary is just to set it as the structure which provided the protruding parts 28a, 28b, and 28c in the filter frame 21. FIG. The filter unit 200 is inserted from the filter unit insertion port 16 so that the symbol X in FIG. 5B corresponds to the symbol X in FIG. 7 and the symbol Y in FIG. 5B corresponds to the symbol Y in FIG. To do.

  5B, the protruding portions 28b and 28c protrude on the rib from the bottom surface 36a of the filter frame, and the ends of the protruding portions 28b and 28c are perpendicular to the filter surface of the filter 14. Sticks out. When the filter unit 200 is inserted, the filter unit 200 is always inserted from the filter frame upper part 26a side. When the filter unit 200 is to be inserted into the filter unit insertion port 16 from the filter frame lower portion 26b side, the protruding portion 28b or 28c is caught by the filter unit insertion port 16 and cannot be inserted. Therefore, the filter unit 200 is always inserted from the filter frame upper part 26a side.

  The protruding portion 28a protrudes in the direction perpendicular to the filter surface of the filter 14 from the filter frame upper side surface 36b. The protruding portion 28a is for preventing the insertion direction from being reversed when the filter unit 200 is inserted. When the filter unit 200 is to be inserted upside down from the filter unit insertion port 16, the protruding portion 28a is caught by the filter unit insertion port 16 and cannot be inserted. On the other hand, if the direction is reversed, the protruding portion 28a can pass through the recessed portion 30 and be inserted. Therefore, the filter unit 200 is always inserted in this direction.

  Therefore, by providing the projecting portions 28a, 28b, and 28c as restricting members on the filter frame 21, the filter unit 200 is placed in a specific direction to the filter unit insertion port 16 in the process of arranging the filter unit 200 in the air passage 13. By disabling the insertion of the filter 14, the filter 14 can always be arranged in a specific direction, and the replacement work of the filter 14 can be made smooth. The configuration of the restricting member is not limited to the configuration of the protruding portions 28a, 28b, and 28c shown in FIG.

  In order to lock the filter 14 to the filter frame 21, the filter frame upper portion 26a may be configured to be detachable from the filter frame columns 27a and 27b. First, the filter 14 is arranged so that the valley of the pleat substantially contacts the pin 20e on the filter frame lower part 26b from which the filter frame upper part 26a is separated, and then the filter frame upper part 26a is attached to be locked.

  In the present embodiment, one filter 14 is locked to the filter frame 21, but the filter 14 may be divided and the divided filters 14 may be locked to separate filter frames 21. For example, the filter 14 can be divided where the size of the crest interval 24 changes. Since the filter 14 according to the present embodiment is fixed by the pins 20d and 20e, even if the filter 14 is divided, the divided filters 14 can be locked to different filter frames 21, respectively. The divided filter unit 200 may be installed in parallel with the air conditioner.

  The air conditioner of the present invention is applicable not only to a vehicle air conditioner but also to all air conditioners such as an indoor air conditioner. The filter unit of the present invention is not limited to a vehicle air conditioner and can be mounted on all air conditioners such as indoor air conditioners.

It is the schematic which showed the HVAC unit of the vehicle air conditioner which is one Embodiment of the air conditioner of this invention. It is the schematic perspective view which showed one form of the arrangement | positioning part of the filter of a HVAC unit. It is a schematic sectional drawing of the arrangement | positioning part of a filter, (a) is a schematic cross-sectional view of an air passage, (b) is a schematic longitudinal cross-sectional view of an air passage. It is the schematic perspective view of a cover body, (a) is the schematic perspective view which showed the cover body surface, (b) is the schematic perspective view which showed the cover body back surface. It is the schematic which showed one Embodiment of the filter unit of this invention, (a) is a schematic plan view, (b) is a schematic front view, (c) is a schematic bottom view. It is a schematic sectional view when a filter unit is arranged in an air passage, (a) is a schematic sectional view in a BB section of a filter unit, (b) is a schematic sectional view in an AA section of a filter unit. is there. It is the schematic which showed the filter unit insertion port for arrange | positioning a filter unit in an air path. It is the schematic which showed 2nd Embodiment of the filter, Comprising: The case where a filter is a sponge-like filter is shown.

Explanation of symbols

13 Air passage 14, 17 Filter 15 Filter insertion port 16 Filter unit insertion port 19a, 19b, 19c, 19d Protrusion 20a, 20b, 20d, 20e Pin 21 Filter frame 22, 24 Mountain spacing 23 Filter fold 25a Dust collection Filter 25b Deodorizing filter 26a Filter frame upper part 26b Filter frame lower part 27a, 27b Filter frame column 28a, 28b, 28c Projection part 29 Filter region 30 Concave part 31 Photocatalyst light source 33 Cover body 34, 37 Grasping part 35 Back inner wall 36a Filter frame lower part bottom face 36b Upper side of filter frame 38, 39 Recess 40 Air intake port 41 Outside air inlet port 42 Inside air inlet port 43 Blower 44 Evaporator 45 Intake door 47 Blower motor 48 Blower housing 49 Cooler housing 50 Seam 51 Main body case 52a, 52b filter end 60a, 60b, 60c, 60d airflow 100 HVAC unit 200 the filter unit

Claims (9)

  In an air conditioner comprising an air passage that forms an air flow from an air intake port toward a purified air discharge port, a blower that forms the air flow, an evaporator, and a filter that is disposed upstream of the evaporator. According to the flow velocity of the air flow on the filter surface of the filter, the portion where the flow velocity is high sets the ventilation resistance of the filter high, and the portion where the flow velocity is low sets the ventilation resistance of the filter low Air conditioner to do.   The filter is a pleated filter, the air gap resistance is set high by widening the crest distance between adjacent pleats of the filter, and the air flow resistance is set low by narrowing the crest distance. The air conditioner according to claim 1.   The air conditioner according to claim 1 or 2, wherein the blower is disposed in the air passage on the upstream side of the filter.   4. The crest interval in a filter region where the air flow blown out from the blower reaches the shortest distance among the filter surfaces of the filter is wider than a crest interval in a filter surface other than the filter region. The air conditioner described in 1.   A plurality of pins arranged on the inner wall of the air passage, the position of the pleat valley of the filter is fixed, and the crest interval between adjacent crests of the pleat of the filter is set to a predetermined crest interval. The air conditioner according to claim 1, 2, 3 or 4.   A filter frame, a filter processed into a pleat shape that is locked to the filter frame, and a peak interval between adjacent peaks of the pleats of the filter are set with the filter locked to the filter frame. And a filter unit, wherein the filter has a narrow part and a wide part.   A filter frame, a filter processed into a pleat shape that is locked to the filter frame, and a peak interval between adjacent peaks of the pleats of the filter are set with the filter locked to the filter frame. A filter unit disposed in an air passage of an air conditioner for forming an air flow, wherein the filter unit is disposed on the air passage when the filter unit is disposed in the air passage. According to the flow rate of the air flow, the crest interval is set such that the portion where the flow velocity is fast is wide and the portion where the flow velocity is slow is narrow.   The crest interval setting means is means for fixing the crest interval of the pleats of the filter to a predetermined crest interval with a plurality of pins arranged on the inner wall of the filter frame. The filter unit according to claim 6 or 7. 9. The filter unit according to claim 6, wherein a restriction member that determines a direction of the filter unit to a filter unit insertion port provided in a wall of the air passage is provided in the filter frame.

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