KR20090122229A - Heat exchanger - Google Patents

Abstract

A heat exchanger having a heat transfer tube (12), heat transfer fins (13a) arranged side by side in the direction crossing the axis of the heat transfer tube (12), and cut and turned up sections (14) provided on the heat transfer surface of each heat transfer fin (13a). At the lower end or at both the upper and lower ends of a cut and turned up section (14) are formed incisions extending in the longitudinal direction. The incisions guide condensed water produced on the surfaces of the heat transfer fins so that it flows downward.

Description

Heat exchanger {HEAT EXCHANGER}

The present invention relates to a structure of a heat exchanger such as an indoor unit for an air conditioner.

Generally as a heat exchanger of the indoor unit for an air conditioner, the cross fin coil type air heat exchanger is employ | adopted. In this type of heat exchanger, condensate generated at the surface of the heat exchanger (evaporator) during cooling operation flows down the fin surface of the heat exchanger due to its own weight. The condensate is collected in a drain pan provided below the heat exchanger and discharged to the outside (see, for example, Japanese Patent Document 1).

21 and 23 show a conventional indoor unit for an air conditioner equipped with such a heat exchanger. The indoor unit 1 for the air conditioner includes an air heat exchanger 32 that is bent in a λ shape and a cross flow fan 31. In the indoor unit 1, the air is sucked from the upper surface and the front surface of the indoor unit 1, and the air is blown out obliquely downward from the bottom surface of the indoor unit 1. Moreover, the indoor unit 1 is equipped with the cassette-type main body casing 20. As shown in FIG. The main body casing 20 is attached to the wall surface in the state which made the back panel abut on the wall surface of the room.

A suction port 25 for sucking air is provided on the front and upper surfaces of the main body casing 20. In the main body casing 20, an air heat exchanger 32 and a cross flow fan 31 are provided. The air heat exchanger 32 consists of the total heat exchange part 32a and the after heat exchange part 32b. The cross flow fan 31 is provided below the front heat exchange part 32a and the after heat exchange part 32b. By the crossflow fan 31, the warm air is blown out obliquely downward through the blowing passage 30 of the scroll structure and the blower outlet 29 of the main body casing 20. As shown in FIG. Lower ends of the total heat exchange part and the post heat exchange parts 32a and 32b are respectively fixed and supported in the respective drain pans 28a and 28b.

As shown in FIG. 22, each heat exchange part 32a, 32b consists of a heat exchanger tube 12, the heat-transfer fin 13a, the cutting piece 14, and a tube plate not shown. The heat transfer pipes 12 are arranged in two rows on the upstream side and the downstream side of the air flow F, and alternately shift positions. The heat transfer fins 13a are arranged at a predetermined pitch along the axis line of the heat transfer tube 12 and are arranged in parallel with each other. The cutting piece 14 consists of several slits or louvers, and is provided in the upper side and the lower side of each heat exchanger tube 12 on the heat transfer surface of each heat transfer fin 13a.

Each cut piece 14 consists of four rows of slits or louvers arranged from the upstream to the downstream of the air stream F (from left to right in FIG. 22). The cut pieces 14a positioned near both edges of the heat transfer fins 13a and 13b among the cut pieces 14 are cut pieces 14b positioned in the center of the heat transfer fins 13a and 13b. It is longer.

According to the above arrangement, for example, when the crossflow fan 31 serving as the blowing means is driven during cooling or heating operation, indoor air is sucked in through the suction port 25. Then, through the λ-shaped heat exchanger 32 having a large heat exchange area and a large air intake area, the low-temperature loss and uniformly heat-exchanged hot air (cold or warm air) blows out the spouts of the main body casing 20 ( 29). In this way, the blown-out hot air flows downward, and the indoor environment which became comfortable cooling or heating is implement | achieved.

In the indoor unit for a wall-mounted air conditioner, moisture in the air condenses and condenses on the surfaces of the heat transfer fins 13a and 13b during the cooling operation in which the heat exchanger 32 functions as an evaporator. Then, the water droplets adhere to the pins and the cutting pieces 14 and remain.

The condensed water generated in this way is likely to remain on the pin, the cutting piece 14 and the like even after the operation is stopped. The remaining water causes adhesion of environmental suspended matter on the surface of the fin, propagation of bacteria, corrosion of the fin, and the like, which causes deterioration of hydrophilicity and smell of the fin surface.

As is apparent from Fig. 21, the total heat exchange part and the post heat exchange parts 32a and 32b are disposed substantially along the vertical direction. That is, each heat exchange part 32a, 32b is arrange | positioned at the inclination angle which is very small with respect to a perpendicular axis. Therefore, the condensate generated in the heat exchanger flows downward along the fin surface due to its own weight and is collected in the drain pans 28a and 28b.

However, in reality, even if the heat exchanger is provided along the substantially vertical direction, the fins are cut off due to the narrow pitch of the fins in the heat transfer fins 13a and 13b and the hydrophilicity of the fin surface. There is a problem that it is difficult to flow downward while the condensed water stays in the upright piece or the like.

Moreover, depending on the kind of indoor unit for air conditioners, as shown in FIG. 23, the main part 42a of the heat exchanger 42 may be inclined largely downward with respect to the vertical axis | shaft. In such a case, in addition to gravity not acting along the longitudinal direction of the pins and the cutting pieces, the direction of gravity and the direction of the wind are reversed, so that the behavior of condensed water tends to be unstable, and water is scattered from the jet port 49. There is a problem of being easy.

23 shows the indoor unit 1 for the air conditioner, the ceiling 3, the blowing passage 40, the cross flow fan 41, the main portion 42a of the heat exchanger 42, and the upper end of the heat exchanger 42. 42b, the ceiling panel 44, the air intake port 45, the air blower outlet 49, the main body casing 50, and the 1st-3rd drain pans 48a-48c are shown.

These problems arise in the same manner even when the cutting pieces 14a provided near both edges of the heat transfer fins 13a and 13b are divided into upper and lower portions as shown in FIG. 24.

[Patent Document 1: Japanese Patent Application Laid-Open No. 2004-353914]

An object of the present invention is to provide a heat exchanger suitable for an indoor unit or the like for an air conditioner capable of promoting the flow of condensate downward by providing a linear upper portion extending in the longitudinal direction at the lower end or the upper end and the lower end of the cutting piece. .

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, according to the 1st aspect of this invention, it is provided in the heat exchanger tube, the some heat exchanger fin arranged in parallel with each other along the direction which intersects the axis line of a heat exchanger tube, and the heat exchanger surface of the heat exchanger fin. A heat exchanger with cut pieces is provided. At the lower end of the cutting piece, a linear upper portion is provided to extend downward and to guide the condensed water generated on the heat transfer surface downward.

According to this configuration, the condensed water flows smoothly through the linear upper portion without remaining between the heat transfer fins, particularly between the cut-up pieces of the heat transfer fins. For this reason, it is possible to prevent adhesion of environmental suspended matter on the surface of the pin, propagation of bacteria, corrosion of the pin, and the like. In addition, since the drainage property during the cooling operation is also improved, the cooling capacity is improved, the ventilation resistance is reduced, and water splashing is prevented.

In said heat exchanger, it is preferable that the linear upper part for extending condensed water downward while extending upward is provided in the upper end of the cutting piece.

According to this configuration, the condensed water flows smoothly into the cut pieces without remaining at the upper end of the cut pieces of the heat transfer fins, particularly the heat transfer fins. And the condensate flows smoothly through the linear upper part extended downward from the lower end of the cutting piece. As a result, adhesion of environmental suspended matter to the surface of the pin, propagation of bacteria, corrosion of the pin, and the like can be prevented more effectively. In addition, the drainage during the cooling operation is also improved, the cooling capacity is improved, the ventilation resistance is reduced, and water splashing is prevented.

In the heat exchanger described above, it is preferable that the cutting pieces are divided into upper and lower portions, and a linear upper portion is provided between the upper portion and the lower portion and extends along the longitudinal direction to guide the condensate downward.

According to this structure, the condensed water is guided downward by the linear upper part even between the upper part and the lower part of the divided cutting piece. For this reason, condensed water can be effectively discharged even when the decomposition type cutting piece is adopted.

In said heat exchanger, it is preferable that the linear part is in communication with a cutting piece.

According to this structure, the condensed water which flows along a linear upper part flows in smoothly into a cut piece. In addition, the condensed water flows out smoothly from the inside of the cutting piece and flows down below the heat transfer fin. Therefore, the effect of discharging the condensed water in the cutting piece is further improved.

In said heat exchanger, it is preferable that the upper end and the lower end of a cutting piece are inclined, and the linear part is provided in the narrow part in the upper part and the lower end of a cutting piece.

In the conventional structure, the inclination angle in the upper end and the lower end of a slit is large, and is provided along the circular arc around each heat exchanger tube. For this reason, the condensed water which flowed into each slit tends to remain in the vicinity of the upper end surface of a slit, and did not flow for a long time after stopping operation of the indoor unit for air conditioning.

According to this configuration, the condensed water near the upper end of the cut piece smoothly flows into the cut piece from the narrow angle part of the cut piece, and the condensed water in the cut piece is smooth from the narrow part at the bottom of the cut piece. Flow down

In said heat exchanger, it is preferable that the upper end and the lower end of a cutting piece are inclined, and the linear upper part of the cutting piece piece is provided in the wide angle part of a cutting piece.

Thus, even if the linear upper part of the upper end of a cutting piece is provided in a wide angle part, the effect similar to the case where it is provided in a narrow angle part can be acquired.

In said heat exchanger, it is preferable that the linear part is provided in the edge part center of a cutting piece.

Even if the linear upper part is provided in the center of the edge part of the cutting piece, the effect similar to the said structure can be acquired. In addition, when the linear upper part is a cutout part, since the position of the cutout line of a slit and the position of the cutout line shift | deviate, the precision of a cutout process improves and a deformation | transformation of a pin surface is suppressed.

In the heat exchanger, the linear portion preferably extends along the short pitch of the heat transfer fins.

In this way, when the linear upper portion extending along the short pitch of the heat transfer fin is provided, the condensed water is guided linearly along the longitudinal direction, thereby improving the discharge efficiency of the condensed water.

With respect to the heat exchanger described above, it is preferable that the line portion at the upper end or the lower end of the cut piece extends obliquely to avoid the fin collar through which the heat transfer tube is inserted.

According to this structure, since the linear part is separated from the pin collar, the interference between the mold and the linear part used for press molding of the pin collar is eliminated.

In the heat exchanger described above, it is preferable to include a drainage rib which is provided along the leading edge or the trailing edge of the heat transfer fin and which is close to or connected to the linear upper portion of the lower end of the cutting piece.

According to this structure, condensate is guided to the drainage rib by the linear upper part of the lower end of the cutting piece, and condensate is discharged more efficiently through the drainage rib.

In the heat exchanger described above, the linear portion is preferably a linear cutout.

According to this structure, the condensed water which flows along a linear incision part flows in smoothly into a cut piece. And the condensate in the cutting piece flows smoothly from inside of the cutting piece, and falls under the heat transfer fin. Therefore, the effect of discharging the condensed water in the cutting piece is more effectively improved. In addition, the ventilation resistance is suppressed smaller than when the linear upper portion is a groove.

In the heat exchanger described above, the linear portion is preferably a linear groove.

According to this structure, the condensed water which flows along a linear groove flows in smoothly into a cut piece. And the condensate in the cutting piece flows smoothly from inside of the cutting piece, and falls under the heat transfer fin. Therefore, the effect of discharging the condensed water in the cutting piece is more effectively improved.

In the heat exchanger described above, the cutting piece is preferably a louver.

According to this structure, condensate flows smoothly through the linear upper part extended from the upper end and the lower end of a cutting line piece, without staying in between the heat transfer fins, especially the louver piece which consists of louvers. For this reason, it is possible to prevent adhesion of environmental suspended matter on the surface of the pin, propagation of bacteria, corrosion of the pin, and the like. In addition, the drainage during the cooling operation is also improved, the cooling capacity is improved, the ventilation resistance is reduced, and water splashing is prevented.

In said heat exchanger, it is preferable that a heat exchanger is a heat exchanger of the indoor unit for air conditioners.

According to the structure of each of the above inventions, in the heat exchanger of the indoor unit for air conditioners which is easy to produce condensation on the heat-transfer fin surface, at the time of cooling operation, the condensed water which arose between the heat-transfer fin and the cutting piece can be discharged smoothly.

1 is a partial front view of an air heat exchanger according to a first embodiment of the present invention.

2 is an enlarged partial sectional view showing a main portion of an air heat exchanger;

3 is a partial front view of an air heat exchanger according to a second embodiment of the present invention.

4 is an enlarged partial sectional view showing a main portion of an air heat exchanger;

The partial front view which shows the air heat exchanger which concerns on 3rd embodiment of this invention.

FIG. 6 is a partial front view of an air heat exchanger according to a fourth embodiment of the present invention. FIG.

The partial front view which shows the air heat exchanger which concerns on 5th Embodiment of this invention.

The partial front view which shows the air heat exchanger which concerns on 6th Embodiment of this invention.

The partial front view which shows the air heat exchanger which concerns on 7th Embodiment of this invention.

The partial front view which shows the air heat exchanger which concerns on 8th Embodiment of this invention.

The partial front view which shows the air heat exchanger which concerns on 9th Embodiment of this invention.

The partial front view which shows the air heat exchanger which concerns on 10th Embodiment of this invention.

The partial front view which shows the air heat exchanger which concerns on 11th Embodiment of this invention.

The partial front view which shows the air heat exchanger which concerns on 12th Embodiment of this invention.

The partial front view which shows the air heat exchanger which concerns on 13th Embodiment of this invention.

The partial front view which shows the air heat exchanger which concerns on 14th Embodiment of this invention.

The partial front view which shows the air heat exchanger which concerns on 15th Embodiment of this invention.

(A)-(c) is the fragmentary sectional drawing which expands and shows the principal part of an air heat exchanger.

19 is a partial front view of an air heat exchanger according to a sixteenth embodiment of the present invention.

20 (a) to 20 (e) are partial cross-sectional views showing enlarged parts of an air heat exchanger common to each embodiment.

Sectional drawing which shows the indoor unit for air conditioners provided with the air heat exchanger which concerns on the 1st prior art example of FIG.

Fig. 22 is a partial sectional view showing a main portion of an air heat exchanger.

FIG. 23 is a cross-sectional view showing an indoor unit for an air conditioner including an air heat exchanger according to a second conventional example. FIG.

24 is a partial cross-sectional view showing a main portion of an air heat exchanger according to a third conventional example.

(1st embodiment)

1 and 2 show the configuration and operation of an air heat exchanger suitable for an indoor unit (see FIGS. 21, 23 and the like) for an air conditioner according to a first embodiment of the present invention.

The air heat exchanger 32 (32b) consists of the heat exchanger tube 12, the heat exchanger fins 13a and 13b, the cut-up piece 14, and the tube plate not shown. The heat transfer tubes 12 are arranged in two rows on the upstream side (front side) and the downstream side (rear side) of the air flow F with the positions alternately alternately arranged. The heat transfer fins 13a and 13b are arranged at a predetermined pitch along the axis line of the heat transfer tube 12 and are arranged in parallel with each other. The cutting piece 14 consists of several slit 14a, 14b, and is provided in the upper side and the lower side of each heat exchanger tube 12 on the heat transfer surface of each heat transfer fin 13a. The tube plate is provided near both ends of the heat transfer fins 13a and 13b in the arrangement direction.

Each cut piece 14 consists of four rows of slits 14a and 14b arranged from the upstream side to the downstream side (from the left side to the right side of the air flow F). Among the cut pieces 14, the cut pieces 14b positioned near both edges of the heat transfer fins 13a and 13b are each cut pieces 14a positioned at the center of the heat transfer fins 13a and 13b. Longer than)

In each heat-transfer fin 13a, 13b, the slit 14a, 14b of each cutting piece 14 is equipped with the upper end and lower end which have predetermined inclination-angle. At the upper end and the lower end of the two rows of slits 14a and 14b, linear portions extending upwardly or downwardly are provided along the leading edges of the slits 14a and 14b, respectively. On the other hand, the upper and lower ends of the rear two rows of slits 14b and 14a are provided along the trailing edges of the slits 14a and 14b, respectively. Each linear upper part is for guiding condensate downward by capillary action, and specifically, it is linear incision (cutting part shown in FIG. 20 (a)) (a, b), and each of these slits 14a, Communication within 14b).

According to this configuration, after the condensed water generated on the fin surface of the heat transfer fins 13a and 13b is collected in the incision a extending from the upper end of each of the slits 14a and 14b, the condensed water is collected into the top surfaces of the slits 14a and 14b. The action flowing into each slit 14a, 14b is restrained without returning. Then, it flows smoothly toward the lower end of the heat-transfer fin 13a, 13b through the incision b extended from the lower end of each slit 14a, 14b. And it flows into the drain pan (refer to 28a, 28b of FIG. 5) below them through the heat transfer fins 13a, 13b.

Therefore, between the fin surfaces of the heat transfer fins 13a and 13b, the condensed water does not stay on the upper and lower surfaces of the cutting piece 14. Therefore, it is possible to prevent adhesion of environmental suspended matter on the surface of the pin, propagation of bacteria, corrosion of the pin, and the like. In addition, the drainage is improved during the cooling operation, the cooling ability is improved, the ventilation resistance is reduced, and water splashing is prevented.

As a result, as a cross fin coil type air heat exchanger suitable for an indoor unit for an air conditioner as shown in Figs. 21 and 23, adhesion of environmental suspended matter to the fin surface, propagation of bacteria, corrosion of the fin, and the like are prevented and cooled. It is possible to provide a heat exchanger which can have good drainage during operation, improve cooling capacity, reduce ventilation resistance, and prevent water from splashing, at low cost.

In place of the slits 14a and 14b, for example, the cut pieces 14 may be formed using louvers. Moreover, you may change the form, number, and number of columns of the slit 14a. The cutouts a and b may be changed into shallow, narrow linear grooves. Since the cutout does not have a convex surface unlike the groove, it is advantageous in that the cutout hardly causes the ventilation resistance.

(2nd embodiment)

3 and 4 show the configuration of an air exchanger suitable for an indoor unit for an air conditioner according to a second embodiment of the present invention.

In this embodiment, in the cross fin coil type air heat exchanger like 1st Embodiment, like a conventional example of FIG. 24, it is a split type as the cutting piece 14 of the both side edge vicinity of each heat-transfer fin 13a, 13b. Slit 14a is employed. And as shown in FIG. 4, the linear incision (linear) which extends along a vertical direction and has predetermined length is at the upper end and the lower end of each slit 14a, 14b, and the center of each slit 14a. Upper part) (a, b, c) are provided. Here, the cutout portion b located between the divided slits 14a is continuous to the cutout portion c extending downward and the cutout portion a extending upward. Also in this case, the condensate flowing down the fin surface flows into each of the slits 14a and 14b through the linear upper portions a and b, and the condensate is passed through the cutouts b and c to each of the slits 14a and 14b. It flows out smoothly from). Therefore, the condensed water flows downward quickly without remaining the slit 14a, 14b. That is, similarly to the first embodiment, smooth discharge of the condensed water can be realized.

(Third embodiment)

FIG. 5: shows the structure of the air heat exchanger suitable for the indoor unit for air conditioners which concerns on 3rd Embodiment of this invention.

In this embodiment, similarly to the second embodiment, the divided slits 14a are employed as the cutting pieces 14. However, unlike the second embodiment, the divided surfaces of the slit divisions extend along the horizontal direction instead of obliquely. In the upper and lower ends of the slits 14a and 14b and the center of each of the slits 14a, linear cutouts (linear portions) extending along the longitudinal direction and having a predetermined length (a, b, c) is installed. Here, the cutout portion b located between the divided slits 14a is continuous to the cutout portion c extending downward and the cutout portion b extending upward. Also in this case, the condensate flowing down the fin surface flows into the slits 14a and 14b through the linear upper portions a and b, and the condensate flows through the cutouts b and c to the respective slits 14a and 14b. It flows out smoothly from). Therefore, the condensed water flows downward quickly without remaining the slit 14a, 14b. Therefore, as in the second embodiment, the smooth discharge of the condensed water can be realized.

(4th embodiment)

FIG. 6: shows the structure of the air heat exchanger suitable for the indoor unit for air conditioners which concerns on 4th Embodiment of this invention.

In this embodiment, in each slit 14a, 14b of the cross fin coil type air heat exchanger of 3rd Embodiment, it extends further along the longitudinal direction between each slit 14a, 14b adjacent to a horizontal direction, In addition, a linear cutout having a predetermined length, that is, linear portions d, e and f, is provided.

In the four rows of slits 14a and 14b arranged from the upstream to the downstream of the air stream, the linear upper portions d and e are arranged between the divided slits 14a in the first row and the integral slits 14b in the second row. It is installed. Each linear upper part d and e is provided in the state isolate | separated into two places of an upper part and a lower part. Moreover, the linear part f is provided between the integral slit 14b of the 2nd row, and the integrated slit 14b of the 3rd row. The linear upper part f consists of one line continuous from the upper end to the lower end. Further, the linear upper portions d and e are provided between the integrated slit 14b of the third row and the divided slit 14a of the fourth row. Each linear upper part d and e is provided in the state isolate | separated into two places of an upper part and a lower part. Each of the linear portions d, e, f extends along the longitudinal direction. As in the third embodiment, the condensed water flowing down the fin surface flows into the slits 14a and 14b through the linear upper portions a and b, and the condensed water passes through the cutouts b and c. 14a, 14b) flows out smoothly downward. Accordingly, not only the condensed water flows downward quickly without remaining condensed water in the slits 14a and 14b, but also the cut portions d, e and f provided between the slits 14a and 14b, so that each slit of the fin surface The condensate remaining between (14a, 14b) also flows smoothly. Therefore, the discharge | emission action of the condensed water smoother than 3rd Embodiment can be implement | achieved.

(5th embodiment)

FIG. 7: shows the structure of the air heat exchanger suitable for the indoor unit for air conditioners which concerns on 5th Embodiment of this invention.

In this embodiment, the linear cutout a extending from the upper end of the slit 14a, 14b in the cross fin coil type air heat exchanger of 3rd Embodiment is provided in the wide angle part instead of the narrow angle part. As is known, the condensed water on the fin surface tends to concentrate on the central lower portion of the fin collar through which the heat transfer tube 12 is inserted. Therefore, by providing the linear cutout a in the wide-angle portion at the upper ends of the slits 14a and 14b, it is effective for smoothly discharging the condensed water concentrated in the lower part of the pin collar.

(6th Embodiment)

8 shows the configuration of an air heat exchanger suitable for an indoor unit for an air conditioner according to a sixth embodiment of the present invention.

This embodiment differs from each other in the third embodiment in which linear cutouts a, b, and c are provided in the narrow portion and the divided portion of each slit 14a, 14b, as shown in FIG. 8. The cutouts a, b, and c are provided in the upper center and lower center of 14a, 14b.

Also in this case, the condensate flowing down the fin surface flows into each of the slits 14a and 14b through the linear upper portion a, and the condensate flows smoothly from each of the slits 14a and 14b through the incisions b and c. Spills downward. Therefore, the condensed water flows downward quickly without remaining the slit 14a, 14b. Therefore, as in the third embodiment, the smooth discharge of the condensed water can be realized.

In this case, when processing the cutouts in the upper center and lower center of each slit 14a, 14b, the cutouts a, b, and c can be put in the position different from the pin cut which forms a slit. For this reason, the freedom of processing becomes high, the deformation | transformation of the fin surface which arises at the time of slit formation is avoided, and the increase of ventilation resistance is also suppressed.

(Seventh embodiment)

9 shows a configuration of an air heat exchanger suitable for an indoor unit for an air conditioner according to a seventh embodiment of the present invention.

In this embodiment, integral slit 14a, 14b is employ | adopted as the cutting piece 14 located in the vicinity of the both side edge of each heat-transfer fin 13a, 13b, respectively. And in the cross fin coil type air heat exchanger of 1st Embodiment which provided incision part a, b in the upper end and the lower end of each slit 14a, 14b, the cutout part a of the upper end of each slit is removed. It is.

According to this structure, compared with 1st Embodiment, the effect which the condensate which generate | occur | produced on the fin surface flows into each slit 14a, 14b without returning to the upper end surface of each slit 14a, 14b is suppressed, Since there are no cutouts at the upper ends of the slits 14a and 14b, the inflow of condensed water from the upper part of the slit is suppressed. In forming the fin collar or the like, at least the upper cutout a does not interfere with the fin collar 15 through which the heat transfer tube 12 is inserted.

(8th Embodiment)

FIG. 10: shows the structure of the air heat exchanger suitable for the indoor unit for air conditioners which concerns on 8th Embodiment of this invention.

In this embodiment, obliquely divided slits 14a are employed as the cutting pieces 14 positioned near both edges of the heat transfer fins 13a and 13b. At the top and bottom of each slit 14a, 14b and the center of each slit 14a, linear cutouts (linear portions) (a, b, c) extending along the longitudinal direction and having a predetermined length are formed. In the structure of the cross fin coil type air heat exchanger of 2nd Embodiment provided, the cutout part a of the upper end of each slit is removed.

According to this structure, compared with 2nd Embodiment, after condensate which generate | occur | produced on the fin surface gathered in the cutout part a of the upper side of each slit 14a, 14b, it returns to the upper end surface of each slit 14a, 14b. Although the action which flows into each slit 14a, 14b is prevented without entering, since there is no cutout in the upper end of the slit 14a, 14b, the inflow of condensate from the upper part of a slit is suppressed. In forming the fin collar or the like, at least the upper cutout a does not interfere with the fin collar 15 through which the heat transfer tube 12 is inserted. Moreover, since the slit division part is formed obliquely, the flow of condensed water from the upper part to the lower part of the division part is accelerated.

(Ninth embodiment)

FIG. 11: shows the structure of the air heat exchanger suitable for the indoor unit for air conditioners which concerns on 9th Embodiment of this invention.

In this embodiment, the parallel split type slit 14a is employed as the cutting piece 14 positioned near both edges of the heat transfer fins 13a and 13b. In the upper and lower ends of each slit 14a, 14b and the center of each slit 14a, linear incisions (linear parts) a, b, c extending in the longitudinal direction and having a predetermined length are provided. In the structure of the cross fin coil type air heat exchanger of 3rd embodiment, the cut | disconnected a of the upper end of each slit is removed similarly to the case of 7th embodiment.

According to this structure, compared with 3rd Embodiment, after the condensate which generate | occur | produced on the fin surface gathered in the cutout part a of the upper side of each slit 14a, 14b, it returns to the upper end surface of each slit 14a, 14b. Although the action which flows into each slit 14a, 14b is suppressed small without work, inflow of condensate from the upper part of a slit is suppressed. In forming the fin collar or the like, at least the upper cutout a does not interfere with the fin collar 15 through which the heat transfer tube 12 is inserted.

(10th embodiment)

12 shows the configuration of an air heat exchanger suitable for an indoor unit for an air conditioner according to a tenth embodiment of the present invention.

In this embodiment, the parallel segment type slit 14a is adopted as the jasraeum piece 14 located in the vicinity of both edges of each heat-transfer fin 13a, 13b. At the top and bottom of each slit 14a, 14b and the center of each slit 14a, linear cutouts (linear portions) (a, b, c) extending along the longitudinal direction and having a predetermined length are formed. In the structure of the cross fin coil type air heat exchanger of 6th embodiment provided, the linear cutout a of the upper end of each slit is removed.

According to this structure, compared with 6th Embodiment, after the condensate which generate | occur | produced on the fin surface gathered in the cutout part a of the upper side of each slit 14a, 14b, it returns to the upper end surface of each slit 14a, 14b. The action which flows into each slit 14a, 14b is suppressed without entering, but inflow of condensate from the upper part of a slit is suppressed. In forming the fin collar or the like, at least the upper cutout a does not interfere with the fin collar 15 through which the heat transfer tube 12 is inserted.

(Eleventh embodiment)

FIG. 13: shows the structure of the air heat exchanger suitable for the indoor unit for air conditioners concerning 11th Embodiment of this invention.

In this embodiment, the integrated slit 14b is adopted as the cutting piece 14 located in the center of each heat-transfer fin 13a, 13b, and is located in the vicinity of the both side edges of each heat-transfer fin 13a, 13b. As the cutting piece 14, a parallel split type slit 14a is employed. A linear cutout (linear part) extending along the longitudinal direction at the center of the narrow portion at the upper end and the lower end of each slit 14a and 14b, and having a predetermined length, respectively. In the structure of the cross fin coil type air heat exchanger which concerns on 2nd Embodiment which provided (a, b, c), all the cut parts except the cut part b of the center of the parallel split slit 14a ( a, b, c extend obliquely to the fin collar 15 through which the heat transfer tube 12 is inserted.

As in the second embodiment, irrespective of the presence of the pin collar 15, when the cutouts a, b, c extending along the direction are provided in the heat transfer fins 13a, 13b, the pin collars 15 The metal mold | die used for the press molding of the) may interfere with the cutouts a, b, and c.

According to this embodiment, since the distance between the cutouts a, b and c and the pin collar 15 can be sufficiently secured, the interference between the cutout and the mold is avoided, and the degree of freedom of pin machining is increased, and the molding Accuracy is also improved. Also, as is well known, the condensed water on the fin surface tends to be concentrated in the center lower portion of the pin collar 15. In view of this, according to this embodiment, since the cutouts a at the upper ends of the slits 14a and 14b are inclined, the condensed water is likely to be trapped in the cutouts a, and the slits 14a and 14b are transferred to the slits 14a and 14b. Inflow of condensate becomes easy.

(12th Embodiment)

14 shows the configuration of an air heat exchanger suitable for an indoor unit for an air conditioner according to a twelfth embodiment of the present invention.

In this embodiment, the integrated slit 14b is adopted as the cutting piece 14 located in the center of each heat-transfer fin 13a, 13b, and is located in the vicinity of the both side edges of each heat-transfer fin 13a, 13b. As the cutting piece 14, a parallel split type slit 14a is employed. Narrow angle portions at the upper and lower ends of the respective slits 14a and 14b, and linear cutouts (linear portions) extending along the longitudinal direction at the center of each of the slits 14a, respectively, and having a predetermined length (a). In the configuration of the cross fin coil-type air heat exchanger according to the third embodiment in which b, c is provided, all the cutouts a, except the cutout b in the center of the parallel split slit 14a, b and c extend obliquely to the fin collar 15 through which the heat transfer tube 12 is inserted.

As in the third embodiment, irrespective of the presence of the pin collar 15, when the cutouts a, b, and c extending along the longitudinal direction are provided in each of the heat transfer fins 13a and 13b, the pin collar ( The metal mold | die used for the press molding of 15) may interfere with cutout parts a, b, and c.

According to this embodiment, since the distance between the cutouts a, b and c and the pin collar 15 can be sufficiently secured, the interference between the cutout and the mold is avoided, and the degree of freedom of pin machining is increased, and the molding Accuracy is also improved. Also, as is well known, condensate on the fin surface tends to be concentrated at the center lower portion of the pin collar 15. In view of this, according to this embodiment, since the cutouts a at the upper ends of the slits 14a and 14b are inclined, the condensed water is likely to be trapped in the cutouts a, and the slits 14a and 14b are transferred to the slits 14a and 14b. Inflow of condensate becomes easy.

(13th Embodiment)

Fig. 15 shows a configuration of an air heat exchanger suitable for an indoor unit for an air conditioner according to a thirteenth embodiment of the present invention.

This embodiment employs an integrated slit 14b as the cutting piece 14 positioned at the center of each heat transfer fin 13a, 13b, and is located near both edges of each heat transfer fin 13a, 13b. As the cutting piece 14, an oblique split slit 14a is employed. Linear cutouts (linear portions) (a, b, c) extending along the longitudinal direction and having a predetermined length at the top and bottom of each slit 14a, 14b, and in the center of each slit 14a, respectively. On the other hand, the cross fin coil-type air heat exchanger of the eleventh embodiment in which all the cutouts (a, b, c) except for the center cutout of the split slit 14a extend obliquely to the pin collar 15. In the structure of the group, the cut-out part a of the upper end of each slit is removed.

According to this structure, compared with 10th Embodiment, after condensate which generate | occur | produced on the fin surface gathered in the cutout part a of the upper side of each slit 14a, 14b, it returns to the upper end surface of each slit 14a, 14b. Although the action which flows into each slit 14a, 14b is suppressed without being thin, the metal mold | die used for the press molding of the pin collar 15 does not interfere with the cut-out part a.

(14th Embodiment)

FIG. 16: shows the structure of the air heat exchanger suitable for the indoor unit for air conditioners concerning 14th Embodiment of this invention.

In this embodiment, the integrated slit 14b is adopted as the cutting piece 14 located in the center of each heat-transfer fin 13a, 13b, and is located in the vicinity of the both side edges of each heat-transfer fin 13a, 13b. As the cutting piece 14, a parallel split type slit 14a is employed. Linear cutouts (linear portions) (a, b, c) extending along the longitudinal direction and having a predetermined length at the top and bottom of each slit 14a, 14b, and in the center of each slit 14a, respectively. On the other hand, the cross pin coil type air of the twelfth embodiment in which all the cutouts (a, b, c) except the cutout in the center of the split slit 14a extend obliquely to the pin collar 15. In the configuration of the heat exchanger, the cutout a at the upper end of the slit is removed.

According to this structure, compared with the eleventh embodiment, after condensate generated on the fin surface is collected in the cutout a at the upper side of each of the slits 14a and 14b, the condensed water returns to the upper end surfaces of the slits 14a and 14b. Although the action which flows into each slit 14a, 14b is suppressed finely, the metal mold | die used for the press molding of the pin collar 15 does not interfere with the cut-out part a.

(15th Embodiment)

FIG. 17: shows the structure of the air heat exchanger suitable for the indoor unit for air conditioners concerning 15th Embodiment of this invention.

In this embodiment, the integrated slit 14b is adopted as the cutting piece 14 located in the center of each heat-transfer fin 13a, 13b, and is located in the vicinity of the both sides edge of each heat-transfer fin 13a, 13b. As the cutting piece 14, an oblique split slit 14a is employed. In the configuration of the cross fin coil type air heat exchanger of the thirteenth embodiment in which linear cutouts (linear portions) b and c extending obliquely downward are provided only at the narrow angle portions at the lower ends of the respective slits 14a and 14b. The ribs 16a and 16b for drainage are provided along the leading edge of the front fin 13a and the trailing edge of the rear fin 13b. These ribs 16a and 16b have concave portions on one pin face and convex portions on the other pin face. The linear cutout c extending from the narrow angle portion at the lower ends of the slits 14a and 14b is connected to or close to the ribs 16a and 16b.

In this case, as the ribs 16a and 16b, for example, a cross-sectional semicircle rib shown in Fig. 18A, a cross-sectional rib shape shown in Fig. 18B, and a cross-sectional rectangle shown in Fig. 18C. Shape ribs; and the like. According to this configuration, in addition to eliminating the interference between the mold and the cutout portion used for the press molding of the pin collar, the condensed water in the slit 14a located near the side edges of the heat transfer fins 13a and 13b is provided with ribs 16a, It is discharged smoothly through the groove of 16b).

(16th Embodiment)

Fig. 19 shows a configuration of an air heat exchanger suitable for an indoor unit for an air conditioner according to a sixteenth embodiment of the present invention.

In this embodiment, the integrated slit 14b is adopted as the cutting piece 14 located in the center of each heat-transfer fin 13a, 13b, and is located in the vicinity of the both side edges of each heat-transfer fin 13a, 13b. As the cutting piece 14, a parallel split slit 14a is used (only the narrow angle portion at the lower end of each slit 14a, 14b extends obliquely downward, avoiding the pin collar 15, and is also prescribed. In the configuration of the cross fin coil-type air heat exchanger of the fourteenth embodiment in which linear cutout portions (linear portions) c and b having a length are provided, the front and rear rows of the heat transfer fins 13a and fins 13b. The ribs 16a and 16b for drainage are provided along the trailing edge of () These ribs 16a and 16b have a recessed part in one fin surface, and a convex part in the other fin surface. The linear incision extending from the narrow angle of the lower end of 14a, 14b is contiguous or close to rib 16a, 16b. Doing.

In this case, as the ribs 16a and 16b for drainage, for example, the cross-sectional semicircular ribs shown in Fig. 18A, the cross-sectional triangular ribs shown in Fig. 18B, and Fig. 18C are shown. A rib having a cross-sectional rectangular shape shown in the drawings can be employed. According to this configuration, in addition to eliminating the interference between the mold and the cutout portion used for the press molding of the pin collar, the condensed water in the slit 14a located near the side edges of the heat transfer fins 13a and 13b is provided with ribs 16a, It is discharged smoothly through the groove of 16b).

(Other modified examples of linear upper part having inflow and outflow effect of condensed water)

As described above, as the linear tops a to c of the embodiments, in addition to the cutout shown in FIG. 20A, for example, the micro space shown in FIG. 20B and the scribing shown in FIG. 20C. The micro groove of a (scribing) shape, the micro slit shown to FIG. 20 (d), the micro louver shown to FIG. 20 (e), etc. can be employ | adopted. In these cases, since the capillary phenomenon due to the minute gap is exerted, the surrounding condensate can be drawn in, and the condensate can be discharged smoothly.

(Various application forms)

The heat exchanger of each embodiment is optimal as a cross fin coil type air heat exchanger of the indoor unit for air conditioners shown to FIG. 21, FIG. Specifically, the drainage during the cooling operation is good, the cooling ability is improved, the ventilation resistance is reduced, and the water is free from adhesion of environmental suspended matter to the surface of the heat transfer fin, germ propagation, and corrosion of the fin. The indoor unit for an air conditioner in which splashing etc. can be prevented can be manufactured simply and at low cost. The heat exchanger of the present invention can be applied to all other types of refrigeration apparatus.

Claims (14)

A heat exchanger comprising a heat transfer tube, a plurality of heat transfer fins arranged in parallel with each other and in a direction crossing the axis line of the heat transfer tube, and a cut-up piece provided on the heat transfer surface of the heat transfer fin, A heat exchanger characterized in that a lower portion of the cut piece extends downward and is provided with a linear upper portion for guiding the condensed water generated on the heat transfer surface downward. The method according to claim 1, A heat exchanger characterized in that the upper end of the cutting piece is provided with a linear upper portion extending upward and for guiding the condensate downward. The method according to claim 1 or 2, The cut piece is divided into an upper portion and a lower portion, and between the upper portion and the lower portion, the linear upper portion for extending the longitudinal direction and guiding the condensate downward is provided. The method according to any one of claims 1 to 3, The linear upper part is in communication with the cutting piece. The method according to any one of claims 1 to 4, An upper end and a lower end of the cutting piece are inclined, and the linear upper portion is provided at a narrow angle portion at the upper end and the lower end of the cutting piece. The method according to any one of claims 2 to 4, An upper end and a lower end of the cutting piece are inclined, and a linear upper portion of the cutting piece piece is provided at a wide-angle portion of the cutting piece. The method according to any one of claims 1 to 4, The said linear upper part is provided in the center of the edge part of the said cutting piece, The heat exchanger characterized by the above-mentioned. The method according to any one of claims 1 to 7, And the linear upper portion extends along the short pitch of the heat transfer fins. The method according to any one of claims 1 to 7, The linear upper portion of the top or bottom of the cutting piece is obliquely extended to avoid the fin collar through which the heat transfer tube is inserted. The method according to any one of claims 1 to 9, And a drainage rib which is provided along the leading edge or the trailing edge of the heat transfer fin, and which is adjacent to or connected to the linear upper portion of the lower end of the cut piece. The method according to any one of claims 1 to 10, And the linear upper portion is a linear incision. The method according to any one of claims 1 to 10, And the linear upper portion is a linear groove. The method according to any one of claims 1 to 12, The cut piece is a heat exchanger, characterized in that the louver. The method according to any one of claims 1 to 13, The heat exchanger is a heat exchanger, characterized in that the heat exchanger of the indoor unit for the air conditioner.

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