JP3382770B2 - Heat exchanger - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate fin tube heat exchanger which is provided in an indoor unit of a separate type air conditioner and can be bent in multiple stages.

[0002]

2. Description of the Related Art Generally, there is a separate type air conditioner. The indoor unit of this separate type air conditioner is attached to the wall surface in the room.
Indoor heat exchanger (plate fin tube type heat exchanger) that performs cooling, heating, and dehumidifying actions by switching operation.
And a blower for circulating indoor air in the case and exchanging heat with the indoor heat exchanger.

By the way, there is a great demand for miniaturization (especially miniaturization in the height direction) of this indoor unit due to recent housing circumstances, while demand for improvement of heat exchange performance. Therefore, the indoor side heat exchanger, which was conventionally arranged with the height direction substantially vertical, has a slit at several points in the height direction and is bent in multiple steps to make the upper part of the heat exchanger. There has been considered a method of extending and arranging on the back side of the case.

[0004]

However, such a heat exchanger bent in multiple stages has problems to be solved as described below.

That is, in this heat exchanger, generally, after the heat exchange tube is inserted into the plate fin, slits are made at several places of the plate fin and the plate fin is bent. At this time, the inside of the bent portion of the plate fin is bent. There is a case that the strain of becomes large and a large deformation occurs in this part. In this case, there is a problem that drain water is accumulated in the deformed portion and the deformed portion has a large ventilation resistance.

On the other hand, instead of bending, a method of disposing a plurality of heat exchangers in the height direction and inclining them at an arbitrary angle may be considered. With such a configuration, the problem of deformation as described above does not occur,
A new problem arises in that not only the number of parts is increased due to the complicated structure, but also the number of assembly steps is increased.

The present invention has been made in view of such circumstances, and in a heat exchanger of a type in which a slit is formed and then bent after assembling, it is possible to effectively prevent distortion or deformation from occurring inside the bent portion. It is intended to provide a heat exchanger.

[0008]

The first means of the present invention is to stack a large number of plate fins and to provide side plates at both ends thereof.
And stacking these stacked plate plates together.
Insert the heat exchange tube into the insertion hole provided on the side plate.
And along the length of the plate fin.
Bent and formed in multiple stages by the multiple slits
In the heat exchanger consisting of
Attempt to bend at least in the part that bends with slits
Notch is provided on the inner side in the direction of
It is separated in advance for each of the plurality of stages formed by folding,
For maintaining the shape of the heat exchanger after bending to the leeward side of
A holding portion is provided and each holding portion is provided with an engaging portion.
And is provided in the holding portion of the side plate at the time of bending.
By engaging and fixing the engaging parts to each other
The bending center and bending angle should be specified by the plate.
It is a heat exchanger characterized by that.

A second means is the heat exchanger of the first means, characterized in that the cutouts are provided both inside and outside of the bending direction.

[0010]

A third means is, in the heat exchanger of the first means, a point set on the heat exchanger side plate so as to be a bending center of the heat exchanger, in the bending direction of the heat exchanger. The heat exchanger is characterized in that the heat exchanger is set at a position separated from the inner end surface by a predetermined distance in the outer direction of the plate fin.

A fourth means is, in the heat exchanger of the first means, a point set on the heat exchanger side plate so as to be a bending center of the heat exchanger, in a bending direction of the heat exchanger. The heat exchanger is characterized in that the heat exchanger is set at a position that is located a predetermined distance inward of the plate fin from the inner end surface.

A fifth means is, in the heat exchanger of the first means, a point set on the heat exchanger side plate so as to be a bending center of the heat exchanger, from a position of the slit to a length of the plate fin. The heat exchanger is characterized by being set at a position shifted in the vertical direction.

According to the first and second means, after the assembly,
In a heat exchanger of the type that puts in and bends,
Effectively prevent distortion and deformation inside the bent part
Can be stopped. Therefore, drainage collects inside the bent part.
Or, if this part becomes ventilation resistance and the ventilation volume decreases
To prevent and improve the performance of this heat exchanger
There is an effect that can be. In addition, the heat exchanger side plate
It is possible to regulate the bending center and bending angle of the converter.
Therefore, it is possible to reliably prevent the deformation.
It In addition, the heat exchanger curve set on this heat exchanger side plate
This heat exchanger can be folded by simply changing the center point.
This allows you to control the bend shape and set it freely.
It is also possible to change the dimensions of the heat exchanger. According to
The simple structure improves the freedom of design of this heat exchanger.
There is an effect that can be made.

[0015]

According to the third to fifth means, the point set on the heat exchanger side plate so as to be the bending center of the heat exchanger is defined by the plate from the inner end face in the bending direction of the heat exchanger. Set a position that is a predetermined distance away from the fins,
It is set at a position inwardly of the plate fin by a predetermined distance from the inner end face in the bending direction of the heat exchanger,
Alternatively, the bent shape of the heat exchanger can be freely set by setting the slit fin at a position shifted in the lengthwise direction of the plate fin, and the dimensions of the heat exchanger can be changed accordingly.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS.

First, the first embodiment will be described with reference to FIGS.

Reference numeral 1 in FIG. 1 denotes an indoor unit attached to a wall surface in the room. The indoor unit 1 includes a case 2. A first suction port 3 is provided on the front surface of the case 2, and a second suction port 4 is provided on the upper surface. Also,
An air outlet 5 is defined in the lower portion of the case 2.
Inside the case 2, an indoor heat exchanger 6 bent at two positions in the height direction is arranged so as to face the first and second suction ports 3 and 4.

On the back side of the indoor heat exchanger 6, the number 7 in FIG.
The cross flow fan shown by is provided. The indoor unit 1 rotates the cross-flow fan 7 to suck the indoor air from the first and second suction ports 3 and 4 and pass the indoor heat exchanger 6 to perform heat exchange. Then, the heat-exchanged air is blown out into the room from the air outlet 5.

Next, the structure of the indoor heat exchanger 6 (hereinafter referred to as "heat exchanger 6"), which is the subject matter of the present invention, will be described with reference to FIGS. 2 and 3 together with its manufacturing method.

The heat exchanger 6 is of a so-called plate fin tube type, in which a large number of plate fins 9 shown in FIG. 2 (a) are laminated in a direction perpendicular to the plane of the drawing, and the lamination is performed. After arranging the side plates 10 shown in FIG. 1B at both ends, a U-shaped heat exchange tube is provided in each of the plate fins 9 and the insertion holes 11 provided in the side plates 10 in a plurality of layers. It is manufactured by inserting (shown as 13 in FIG. 3). In the heat exchanger 6, the plate fin 9 is cut and separated by assembling slits at two places indicated by alternate long and short dash lines (a) and (b) in FIG. 2 (a) before being assembled to the indoor unit 1. By being bent as shown in FIG. 3, it is formed into the shape shown in FIG. The side plate 10 is not shown in FIG.

The plate fin 9 shown in FIG.
Is integrally formed, for example, by pressing a thin plate material made of aluminum into a strip shape. A cut-and-raised portion 14 as shown in the drawing is provided between the insertion holes 11 ... Adjacent to the plate fin 9 in the longitudinal direction, thereby increasing the heat exchange area of the plate fin 9.

In addition, at the two cutting portions (portions where slits are formed) indicated by the one-dot chain lines (a) and (b), one side portion located on the windward side (outside of the bending direction) and the leeward portion are provided. Notches 15 and 16 are provided on the other side portions located on the side (inside the direction in which the bending is performed). Of these, the notch 16 on the other side is a corner of each of the upper, middle, and lower parts of the plate fin 9 (indicated by 9a, 9b, and 9c in the figure) that are cut when the heat exchanger 6 is bent. Have a function as a relief for preventing the two from interfering with each other.

The side plate 10 shown in FIG. 2 (b) is
The heat exchanger 6 has a function of reinforcing the heat exchanger 6 and maintaining the shape of the heat exchanger 6 after being bent, and is made of, for example, an aluminum material or a stainless material. The side plate 10 is composed of three members, an upper part 10a, a middle part 10b, and a lower part 10c, and unlike the plate fin 9, they are separated in advance.

A large number of insertion holes 12 communicating with the insertion holes 11 of the plate fins 9 are formed at one end portion of the side plate 10 located on the windward side. On the other hand, the other end located on the leeward side of each of the upper, lower, middle and lower parts 10a, 10b, 10c of the side plate 10 serves as holding parts 17a, 17b, 17c for maintaining the shape of the heat exchanger 6 after bending. There is.

Of these, the holding portion 17b provided on the side plate 10 of the middle portion 10b has 18, as shown in FIG.
First and second engaging protrusions shown by 19 are provided, and the holding portions 17a, 17 of the side plate 10 of the upper portion 10a and the lower portion 10c are provided.
In c, the first and second engagement holes 20 and 21 that engage with the first and second engagement protrusions 18 and 19 as shown in FIG. 3 when the heat exchanger 6 is bent. Are provided respectively.

By engaging the engaging protrusions 18 and 19 with the engaging holes 20 and 21, the bending angle of the heat exchanger 6 can be set to a desired angle. By fixing the engaging projections 18 and 19 and the engaging holes 20 and 21, the bent shape can be maintained.

That is, as shown in FIG. 2B, for example, regarding the relationship between the first engaging protrusion 18 and the first engaging hole 20, the first engaging protrusion 18 and the first engaging protrusion 18 are connected to each other. Since two engaging holes 20 are provided in the width direction of the side plate 10, by engaging both of them, the bending center of the heat exchanger 6 shown by A in the figure and the bending shown by θ1. The angle is defined.

In the case of the second engaging projection 19 and the second engaging hole 20, only one of each is provided. This is because the side plates 10b and 10c or the plate fins 9b and 9c are brought into contact with each other at a point indicated by B in the figure, and bending is performed with this point B as a fulcrum (folding center). The bending angle θ2 is defined even when the number of the engaging projections and the number of the engaging holes are each one.

The size and the cutting angle of the notch 16 formed in the plate fin 9 are determined according to the bending angle of the heat exchanger 6. That is, when the heat exchanger 6 is bent, the separated plate fins 9a, 9a
The corners of b and 9c are set so as not to be pressed against each other and deformed.

With this structure, the effects described below can be obtained.

First, since the notch 16 is provided at the portion of the plate fin 9 where the slit is inserted and the portion is bent (the portion indicated by the one-dot chain line (a) and (b)), a relief is formed. There is no possibility that the cut corners 9a, 9b, 9c of the plate fin 9 are pressed against each other and crushed to cause deformation. Therefore, it is possible to effectively prevent the drain from being accumulated in the bent portion and dropping the drain, or the deformed portion becoming air resistance and reducing the air flow rate.

Since the heat exchanger 6 is of a type in which the plate fins 9 are slit and then cut and bent after assembly, the number of parts is smaller than that in the case where a plurality of heat exchangers are combined. At the same time, the number of assembling steps can be reduced, and the manufacturing can be facilitated.

Second, the plate fin 9 has a notch 16
In addition, the holding portions 17a to 17c are provided on the respective portions 10a to 10c of the side plate 10 and these are engaged with each other as shown in FIG. 3 to regulate the bending angle of the heat exchanger 6.
Since it is maintained, the deformation of the plate fin 9 can be effectively controlled.

The holding portions 17a to 17c allow
Since the passage of the wind that has passed through this heat exchanger 6 can be partitioned,
There is also an effect that this wind can be effectively guided to the cross flow fan 7.

Next, second to fourth embodiments of the present invention will be described.

The second to fourth embodiments are the holding portions 17a, 17b of the side plate 10 in the first embodiment.
By changing the shape of the heat exchanger 6, the first bending center A of the heat exchanger 6 is shifted to an arbitrary position, and the degree of freedom in designing the heat exchanger 6 is improved.
Regarding the second bending center B, the holding portion 17
By changing the shapes of b and 17c, the shift can be performed in the same manner as the first bending center A, and thus the description thereof is omitted here.

In the first embodiment, as shown in FIG.
Point B in (b) and FIG. 3 is the first bending center, and this point is set at a position where the extension line of the other side of the plate fin 9 and the cutting line (a) intersect. ing. That is, as described above, the holding portion 17
The bending center is determined to be the point A based on the positional relationship between the first engagement protrusions 18 and the first engagement holes 20 provided on the a and 17b. On the other hand, in the following second to fourth embodiments, the first engaging protrusion 18
Also, the bending center is shifted by changing the positional relationship between the engaging holes 20.

First, in the second embodiment, as shown in FIG.
As shown in (b), the bending center is shifted to a point A1 on the outer side of the other side of the plate fin 9. That is, as shown in FIG.
The holding portions 17a and 17b are formed so that the lines passing through the first engagement protrusions 18 and the engagement holes 20 provided on the portions 7a and 17b intersect at the point A1.

According to this structure, the heat exchanger 6 is
After bending, as shown in FIG. 5 (b), the gap x between the upper portion 9a and the middle portion 10b of the adjacent plate fins 9 is made wider than in the case of the first embodiment shown in FIG. 5 (a). can do.

Further, FIG. 6 shows a third embodiment. In the third embodiment, contrary to the second embodiment, the bending center is shifted to a point A2 located inside the other side portion of the plate fin. This shift is similar to the case of the second embodiment, and the holding portions 17a, 17 are so arranged that the lines passing through the first engagement protrusion 18 and the engagement hole 20 intersect at the point A2.
Since it can be realized by forming b, the illustration is omitted here.

With this structure, as shown in FIG. 6B, the upper portion 9a and the middle portion 9 of the plate fin 9 are formed.
The distance x from b can be made narrower than that in the first embodiment (FIG. 5A).

FIG. 7 shows a fourth embodiment.
In the fourth embodiment, the bending center is set to the second,
The direction orthogonal to the points A1 and A2 in the case of the third embodiment,
That is, the plate fins 9 are shifted to a point A3 located at a position displaced in the longitudinal direction. Also in this shift, similarly to the case of the second embodiment, the holding portions 17a and 17b are formed so that the lines passing through the first engagement protrusion 16 and the engagement hole 20 intersect at the point A3. Since it can be realized by doing so, the illustration is omitted here.

With such a structure, as shown in FIG. 7B, the upper portion 9a and the middle portion 9 of the plate fin 9 are formed.
These can be arranged in a staggered manner by shifting the height from b as shown by dimension h in the figure.

According to the second to fourth embodiments described above, the bent state of the plate fin 9 can be freely defined only by changing the shapes of the holding portions 17a and 17b of the side plate 10, and the heat exchanger 6 Overall dimensions can also be specified.
Therefore, the degree of freedom in design is improved.

For example, if a plurality of types of side plates 10 are prepared according to the bent shape and dimensions of the heat exchanger 6, the shape of the heat exchanger can be changed by simply replacing the side plate 10 during assembly. can do.

The present invention is not limited to the above-described embodiment, but can be variously modified without changing the gist of the invention.

For example, in the above embodiment, the heat exchanger 6 is an indoor heat exchanger, but it may be applied to an outdoor heat exchanger. Further, not only the separate type air conditioner used at home but also various other air conditioners can be applied.

Further, in the above-mentioned one embodiment, the side plate 1 is provided.
Although 0 was previously cut into the upper part 10a, the middle part 10b and the lower part 10c, it is not limited to this and may be cut at the same time when the plate fin 9 is cut.

Further, in the above-mentioned one embodiment, the side plate 10 is provided.
The holding portions 17a, 17b, 17c are fixed to each other by engaging the engagement protrusions 18, 19 with the engagement holes 20, 21. However, the present invention is not limited to this, and the members are fixed by pins or the like. You may do it.

Further, although the heat exchanger of the above-described embodiment is bent in three stages, it is not limited to this, and it may be folded in two stages or four stages or more.

[0053]

As described above, according to the present invention,
In a heat exchanger of a type in which a slit is formed and bent after assembling, it is possible to effectively prevent distortion and deformation from occurring inside the bent portion. Therefore, it is possible to prevent the drain from accumulating inside the bent portion, and to prevent this portion from becoming a ventilation resistance to reduce the ventilation amount, and it is possible to improve the performance of the heat exchanger.

Further, since the bending center and bending angle of the heat exchanger can be regulated by the heat exchanger side plate, it is possible to reliably prevent the deformation. In addition, the bending shape of this heat exchanger can be regulated or freely set only by changing the bending center point of the heat exchanger set on this heat exchanger side plate. You can also make changes. Therefore, there is an effect that the degree of freedom in designing the heat exchanger can be improved with a simple configuration.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing a first embodiment of the present invention.

FIG. 2 is a side view showing plate fins and heat exchanger side plates.

FIG. 3 is likewise a side view showing a heat exchanger.

FIG. 4 is a side view showing a part of a plate fin and a part of a heat exchanger side plate of the second embodiment.

FIG. 5 is an explanatory view showing dimensions after bending in the same manner.

FIG. 6 is a side view showing a part of a plate fin of the third embodiment and dimensions after bending.

FIG. 7 is a side view showing a part of the plate fins of the fourth embodiment and dimensions after bending.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Indoor unit, 2 ... Case, 6 ... Heat exchanger, 7 ... Cross flow fan (blower), 9 ... Plate fin, 10 ... Heat exchanger side plate, 13 ... Heat exchange tube, A ... Bending center, B
… Bending center, θ1… Bending angle, θ2… Bending angle, (a)
… Slit, (b)… slit.

─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-7-83593 (JP, A) JP-A-6-137590 (JP, A) JP-A-7-260177 (JP, A) JP-A-7- 139748 (JP, A) JP 5-164347 (JP, A) JP 5-172362 (JP, A) Actual development 4-57073 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F24F 1/00 391 F28D 1/047 F28F 9/00 321 F28F 9/00 331 F28F 9/26

Claims (5)

(57) [Claims] 1. A plurality of plate fins are laminated, and both of them are laminated.
Position the side plates at the edges and set the stacked plates together.
The heat exchange channel is installed in the rate fin and the through hole provided in the side plate.
Insert the tube and the plate fin length direction
Folds in multiple stages with multiple slits inserted along
In the heat exchanger formed by bending, the plate filter
At least the bend of the part where the slit is inserted and bent.
A notch is provided on the inner side in the bending direction, and the side plate is divided in advance for each of the plurality of steps formed by bending.
Separated and bent to the leeward side of each, the heat exchanger shape after bending is maintained.
A holding part for holding is provided and each holding part
Engagement portions are provided, and the engagement portions are provided on the holding portion of the side plate at the time of bending.
By engaging and fixing the mating parts to each other,
A heat exchanger characterized by defining a bending center and a bending angle . 2. The heat exchanger according to claim 1, wherein the cutouts are provided both inside and outside the bending direction. 3. The heat exchanger according to claim 1, wherein a point set on the heat exchanger side plate so as to be a bending center of the heat exchanger is from an end face inside the bending direction of the heat exchanger. A heat exchanger characterized in that the heat exchangers are set at positions separated by a predetermined distance in the outer direction of the plate fins. 4. The heat exchanger according to claim 1, wherein a point set on the heat exchanger side plate so as to be a bending center of the heat exchanger is from an end face inside the bending direction of the heat exchanger. A heat exchanger characterized in that the heat exchanger is set at a position that is inward of the plate fin by a predetermined distance. 5. The heat exchanger according to claim 1, wherein a point set on the heat exchanger side plate so as to be a bending center of the heat exchanger is shifted from a position of the slit in a length direction of the plate fin. A heat exchanger characterized by being set in a predetermined position.